阅读说明：本技术 控制阀、空调系统及控制阀的加工方法 (Control valve, air conditioning system and processing method of control valve ) 是由 不公告发明人 于 2019-03-20 设计创作，主要内容包括：本发明公开了控制阀、空调系统及控制阀的加工方法,包括阀体,阀体包括第一端口、第二端口、第三端口、第四端口、第一阀孔、第一通道,第一通道与第二端口连通,阀体包括第一侧部、第二侧部和第三侧部,第一侧部与第二侧部相对设置,第一侧部设置第一端口和第四端口,第二侧部设置第二端口和第三端口,第三侧部与第一侧部相邻,第三侧部与第二侧部相邻,阀体包括侧腔,侧腔的开口侧位于第三侧部,侧腔对应的壁部至少开设有第二阀孔和侧孔,第二阀孔与第一通道连通,侧孔与第一端口连通。该控制阀可实现正向节流,反向导通的功能,且该控制阀结构紧凑。(The invention discloses a control valve, an air conditioning system and a processing method of the control valve, wherein the control valve comprises a valve body, the valve body comprises a first port, a second port, a third port, a fourth port, a first valve hole and a first channel, the first channel is communicated with the second port, the valve body comprises a first side part, a second side part and a third side part, the first side part and the second side part are oppositely arranged, the first side part is provided with the first port and the fourth port, the second side part is provided with the second port and the third port, the third side part is adjacent to the first side part, the third side part is adjacent to the second side part, the valve body comprises a side cavity, the opening side of the side cavity is positioned at the third side part, the wall part corresponding to the side cavity is at least provided with the second valve hole and a side hole, the second valve hole is communicated with the first channel, and the side hole. The control valve can realize the functions of forward throttling and reverse conducting, and has a compact structure.)

1. A control valve comprises a power element, a transmission rod, a valve core assembly and a valve body, wherein the valve body comprises a first port, a second port and a first valve hole, the power element drives the valve core assembly to act through the transmission rod, and the control valve is characterized in that the control valve comprises a valve core part, a base part and a spring, the valve body comprises a first channel, a second channel and a side cavity, the first channel is communicated with the second port, the second channel is communicated with the first port, the valve core assembly acts, and the valve core assembly is communicated with the first valve hole in a matched mode or is communicated with the second channel and the first channel in a stopping mode; the valve core part is at least partially positioned in the side cavity, the base part is at least partially positioned in the side cavity, the spring is at least partially positioned in the side cavity, the valve body is at least provided with a second valve hole and a side hole on the wall part corresponding to the side cavity, the second valve hole is communicated with the first channel, and the side hole is communicated with the second channel; the valve core part is arranged opposite to the second valve hole, the valve core part is larger than the second valve hole, and the spring is positioned between the base part and the valve core part;

when the valve core part covers the second valve hole, the spring is in a compressed state, and the side cavity does not communicate the first port with the second port;

when the valve core part is far away from the second valve hole, the spring is in a compressed state, and the side cavity is communicated with the first port and the second port.

2. The control valve of claim 1, wherein: the valve body comprises a first side, a second side and a third side, the first side is opposite to the second side, the first port is located at the first side, the second port is located at the second side, the third side is adjacent to the first side and/or the second side, the open side of the side cavity is located at the third side,

the wall portion that the side chamber corresponds includes lateral wall and diapire, the valve body is in the diapire sets up the second valve opening with the side opening, the second valve opening is sharp through-hole, the second valve opening with diapire quadrature sets up, the side opening is sharp through-hole, the side opening with diapire quadrature sets up.

3. The control valve of claim 1, wherein: the valve body comprises a first side, a second side and a third side, the first side is opposite to the second side, the first port is located at the first side, the second port is located at the second side, the third side is adjacent to the first side and/or the second side, the open side of the side cavity is located at the third side,

the wall portion that the side chamber corresponds includes lateral wall and diapire, the valve body is in the diapire sets up the second valve opening, the second valve opening with diapire quadrature sets up, the valve body is in the lateral wall sets up the second hole, the side opening with the diapire angulation sets up.

4. The control valve according to claim 1, 2 or 3, wherein: the valve core part is provided with a blocking piece, the blocking piece is larger than the second valve hole, the wall part corresponding to the side cavity is provided with a circular wall corresponding to the second valve hole, the rigidity of the blocking piece is smaller than that of the circular wall, the valve core part comprises a support, the support is provided with a head part, the head part is positioned at the end part of the support, the blocking piece is accommodated in a space surrounded by the head part, the vertical projection of the head part on the bottom wall covers the second valve hole, the head part is arranged opposite to the wall part corresponding to the side cavity, the head part is provided with an arc-shaped section, and at least part of the arc-shaped section is abutted against the blocking piece; the arc-shaped section is provided with a base section and an extending section, at least part of the base section is abutted to the baffle plate, the extending section is close to the wall portion where the second valve hole is located relative to the base section, the extending section extends out of the baffle plate, and the vertical projection of at least part of the extending section in the center direction of the valve core portion falls on the baffle plate; the wall portion that the side chamber corresponds includes the diapire, the diapire includes the boss, the valve body is in the boss is seted up the second valve opening, the section of extending has and is close to the outside portion of diapire side, the boss certainly the protruding height that extends of diapire is greater than the separation blade with the distance between the outside portion of the section of extending.

5. The control valve according to claim 1, 2 or 3, wherein: the valve core part is provided with a blocking piece, the blocking piece is larger than the second valve hole, the wall part corresponding to the side cavity is provided with a circular wall corresponding to the second valve hole, the rigidity of the blocking piece is smaller than that of the circular wall, the valve core part comprises a support, the support is provided with a head part, the head part is positioned at the end part of the support, the blocking piece is accommodated in a space surrounded by the head part, the vertical projection of the head part on the bottom wall covers the second valve hole, the head part is arranged opposite to the wall part corresponding to the side cavity, the head part is provided with an arc-shaped section, and at least part of the arc-shaped section is abutted against the blocking piece; at least part of the side wall of the arc-shaped section is arranged against the baffle plate, the arc-shaped section is provided with a base section and an extension section, the base section of the arc-shaped section is positioned outside the baffle plate, and the vertical projection of at least part of the extension section in the center direction of the valve core part falls on the baffle plate; the wall portion that the side chamber corresponds includes the diapire, the diapire includes the boss, the valve body is in the boss is seted up the second valve opening, the section of extending has and is close to the outside portion of diapire side, the boss certainly the protruding height that extends of diapire is greater than the separation blade with the distance between the outside portion of the section of extending.

6. The control valve according to claim 1, 2 or 3, wherein: the flow area of the first valve hole is smaller than that of the second port, the flow area of the first valve hole is not smaller than the throttling area, the first valve hole is larger than or equal to the side hole, the wall part corresponding to the first channel comprises a first inner wall, the first inner wall comprises a first wall part and a second wall part, the first valve hole is arranged on the first wall part of the valve body, the wall part corresponding to the second valve hole comprises a third wall, the second wall part is connected with the first wall part and the third wall part, and the inner diameter of the third wall part is smaller than that of the second wall part; the wall part corresponding to the second channel comprises a second inner wall, in the longitudinal direction of the valve body, the projection of at least part of the second wall part in the longitudinal direction of the valve body falls on the second inner wall, the projection of the second inner wall in the longitudinal direction of the valve body falls on the second wall part, and the inner diameter of the second wall part is smaller than that of the first wall part.

7. The control valve of claim 1, wherein: the valve body comprises an adjusting seat cavity, the valve core assembly is positioned in the adjusting seat cavity and acts, and the first valve hole is communicated with or closes the second channel, the adjusting seat cavity and the first channel; the valve body comprises a first side, a second side and a third side, the first side is opposite to the second side, the first port is located at the first side, the second port is located at the second side, the third side is adjacent to the first side and/or the second side, the open side of the side cavity is located at the third side,

the wall part corresponding to the side cavity comprises a side wall and a bottom wall, the second valve hole and the side hole are formed in the bottom wall of the valve body, the second valve hole is a linear through hole, the second valve hole is arranged in an orthogonal mode with the bottom wall, the side hole is a linear through hole, and the side hole is arranged in an orthogonal mode with the bottom wall;

the flow area of the first valve hole is smaller than that of the second port, the flow area of the first valve hole is not smaller than the throttling area, the first valve hole is larger than or equal to the side hole, the wall part corresponding to the first channel comprises a first inner wall, the first inner wall comprises a first wall part and a second wall part, the first valve hole is arranged on the first wall part of the valve body, the wall part corresponding to the second valve hole comprises a third wall, the second wall part is connected with the first wall part and the third wall part, and the inner diameter of the third wall part is smaller than that of the second wall part; the wall part corresponding to the second channel comprises a second inner wall, in the longitudinal direction of the valve body, the projection of at least part of the second wall part in the longitudinal direction of the valve body falls on the second inner wall, the projection of the second inner wall in the longitudinal direction of the valve body falls on the second wall part, and the inner diameter of the second wall part is smaller than that of the first wall part;

the base portion comprises a base and a spring, the base comprising a slot, at least a portion of the spring being located in the slot; the base part comprises a threaded section which is in threaded connection with a wall part corresponding to the side cavity; or the valve body is provided with a wrapping edge, the wrapping edge extends from the wall part corresponding to the side cavity, and the extending end of the wrapping edge is abutted against the outer wall of the base;

the valve core part is provided with a blocking piece, the blocking piece is larger than the second valve hole, the wall part corresponding to the side cavity is provided with a circular wall corresponding to the second valve hole, the rigidity of the blocking piece is smaller than that of the circular wall, the valve core part comprises a support, the support is provided with a head part, the head part is positioned at the end part of the support, the blocking piece is accommodated in a space surrounded by the head part, the vertical projection of the head part on the bottom wall covers the second valve hole, the head part is arranged opposite to the wall part corresponding to the side cavity, the head part is provided with an arc-shaped section, and at least part of the arc-shaped section is abutted against the blocking piece;

the ring wall is made of metal, and the baffle plates are made of nylon, resin and rubber;

the head part comprises an accommodating part, the blocking piece is arranged in contact with the accommodating part, the accommodating part is provided with an opening, the blocking piece is provided with a protruding part, and the protruding part extends into the opening;

the head portion including a bearing surface surrounding the arc segment perimeter, the bearing surface extending outwardly from the arc segment root;

the arc-shaped section is provided with a base section and an extending section, at least part of the base section is abutted to the baffle plate, the extending section is close to the wall portion where the second valve hole is located relative to the base section, the extending section extends out of the baffle plate, and the vertical projection of at least part of the extending section in the center direction of the valve core portion falls on the baffle plate; the wall part corresponding to the side cavity comprises a bottom wall, the bottom wall comprises a boss, the boss of the valve body is provided with the second valve hole, the extension section is provided with an outer side part close to the side of the bottom wall, and the protruding height of the boss from the bottom wall is larger than the distance between the blocking piece and the outer side part of the extension section; or at least part of the side wall of the arc-shaped section is arranged against the baffle plate, the arc-shaped section is provided with a base section and an extension section, the base section of the arc-shaped section is positioned outside the baffle plate, and the perpendicular projection of at least part of the extension section in the center direction of the valve core part falls on the baffle plate; the wall portion that the side chamber corresponds includes the diapire, the diapire includes the boss, the valve body is in the boss is seted up the second valve opening, the section of extending has and is close to the outside portion of diapire side, the boss certainly the protruding height that extends of diapire is greater than the separation blade with the distance between the outside portion of the section of extending.

8. An air conditioning system comprising a first heat exchanger, a second heat exchanger and a control valve according to any one of claims 1 to 7, the control valve being at least two, the control valve being a first valve and a second valve, the first port of the first heat exchanger being in communication with the second port of the first valve, the first port of the first valve being in communication with the first port of the second valve, the second port of the second valve being in communication with the first port of the second heat exchanger.

9. The air conditioning system of claim 8, wherein: the air conditioning system further comprises a compressor and a fluid switching valve, the fluid switching device is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface of the compressor is communicated with the second interface of the fluid switching device, the third interface of the fluid switching device is communicated with the third port of the first valve, the third port of the first valve is communicated with the second interface of the first heat exchanger, the second interface of the second heat exchanger is communicated with the third port of the second valve, the fourth port of the second valve is communicated with the first interface of the fluid switching device, and the fourth interface of the fluid switching device is communicated with the second interface of the compressor; the first interface of the fluid switching device is communicated with the second interface of the fluid switching device, the third interface of the fluid switching device is communicated with the fourth interface of the fluid switching device, the first heat exchanger is used as an evaporator, and the second heat exchanger is used as a condenser; or the second interface of the fluid switching device is communicated with the third interface of the fluid switching device, the first interface of the fluid switching device is communicated with the fourth interface of the fluid switching device, the second heat exchanger is used as an evaporator, and the first heat exchanger is used as a condenser.

10. A method for processing a control valve is characterized by comprising the following steps:

drilling a first side part of the valve body blank to form a first port;

drilling a second side of the valve body blank to form a second port;

drilling a third side of the valve body blank to form a side cavity;

milling the wall part corresponding to the side cavity to form a step, and drilling the center of the step to form a second valve hole;

drilling holes in the position, deviating from the center, of the wall part corresponding to the side cavity to form side holes;

the control valve comprises a valve body, the valve body comprises the first port, the second port and a first valve hole, the valve body comprises a first channel, the first channel is communicated with the second port, the wall part corresponding to the first channel comprises a first inner wall, and the first valve hole is formed in the first inner wall of the valve body; the valve body comprises the side cavity, at least a second valve hole and a side hole are formed in the wall part of the valve body corresponding to the side cavity, the first valve hole is communicated with the first channel, and the side hole is communicated with the first port;

the valve body comprises the first side portion, a second side portion and a third side portion, the first side portion is arranged opposite to the second side portion, the first port is located at the first side portion, the second port is located at the second side portion, the third side portion is adjacent to the first side portion and/or the second side portion, and the opening side of the side cavity is located at the third side portion.

Technical Field

The present invention relates to the field of refrigeration.

Background

In a vehicle or household air conditioning system, an evaporator, a condenser, a compressor and a throttling part are required, a general refrigeration system needs to arrange the throttling part in front of the evaporator, and the flow direction of refrigerant in the throttling part is constant. Sometimes, to meet the system requirement, the local refrigerant flow direction in the system is switched to be the reverse condition, and at this time, a valve component needs to be additionally arranged, so that the pipeline connection in the system is more, and the number of parts is more.

Disclosure of Invention

The invention aims to provide a control valve, an air conditioning system and a processing method of the control valve, wherein the control valve can realize the functions of forward throttling and reverse bypass.

In order to realize the purpose, the following technical scheme is adopted:

a control valve comprises a power element, a transmission rod, a valve core assembly and a valve body, wherein the valve body comprises a first port, a second port and a first valve hole, the power element drives the valve core assembly to act through the transmission rod, and the control valve is characterized in that the control valve comprises a valve core part, a base part and a spring, the valve body comprises a first channel, a second channel and a side cavity, the first channel is communicated with the second port, the second channel is communicated with the first port, the valve core assembly acts, and the valve core assembly is communicated with the first valve hole in a matched mode or is communicated with the second channel and the first channel in a stopping mode; the valve core part is at least partially positioned in the side cavity, the base part is at least partially positioned in the side cavity, the spring is at least partially positioned in the side cavity, the valve body is at least provided with a second valve hole and a side hole on the wall part corresponding to the side cavity, the second valve hole is communicated with the first channel, and the side hole is communicated with the second channel; the valve core part is arranged opposite to the second valve hole, the valve core part is larger than the second valve hole, and the spring is positioned between the base part and the valve core part;

when the valve core part covers the second valve hole, the spring is in a compressed state, and the side cavity does not communicate the first port with the second port;

when the valve core part is far away from the second valve hole, the spring is in a compressed state, and the side cavity is communicated with the first port and the second port.

An air conditioning system comprises a first heat exchanger, a second heat exchanger and the control valve according to the technical scheme, wherein the number of the control valves is at least two, the control valves are a first valve and a second valve, a first port of the first heat exchanger is communicated with a first port of the first valve, a second port of the first valve is communicated with a first port of the second valve, and a second port of the second valve is communicated with a first port of the second heat exchanger.

A method of manufacturing a control valve, comprising the steps of:

drilling a first side part of the valve body blank to form a first port;

drilling a second side of the valve body blank to form a second port;

drilling a third side of the valve body blank to form a side cavity;

milling the wall part corresponding to the side cavity to form a step, and drilling the center of the step to form a second valve hole;

drilling holes in the position, deviating from the center, of the wall part corresponding to the side cavity to form side holes;

the control valve comprises a valve body, the valve body comprises the first port, the second port and a first valve hole, the valve body comprises a first channel, the first channel is communicated with the second port, the wall part corresponding to the first channel comprises a first inner wall, and the first valve hole is formed in the first inner wall of the valve body; the valve body comprises the side cavity, at least a second valve hole and a side hole are formed in the wall part of the valve body corresponding to the side cavity, the first valve hole is communicated with the first channel, and the side hole is communicated with the first port;

the valve body comprises the first side portion, a second side portion and a third side portion, the first side portion is arranged opposite to the second side portion, the first port is located at the first side portion, the second port is located at the second side portion, the third side portion is adjacent to the first side portion and/or the second side portion, and the opening side of the side cavity is located at the third side portion.

The control valve of the technical scheme of the invention is provided with the valve core part, the spring and the base part, the valve body is provided with the side cavity, the wall part corresponding to the side cavity is provided with the second valve hole opposite to the valve core part, the valve body is provided with the side hole communicated with the first port, and the second valve hole can be communicated with the first port and the second port.

Drawings

FIG. 1 is a schematic perspective view of one embodiment of a control valve of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a side schematic view and a partial sectional schematic view taken along H-H of the valve body of FIG. 1;

FIG. 4 is another side view and a cross-sectional view taken along C-C of the valve body of FIG. 1;

FIG. 5 is an exploded view of the spool portion of FIG. 1;

FIG. 6 is a further side view and a cross-sectional view A-A of the valve body of FIG. 1;

FIG. 7 is a schematic cross-sectional view taken along line J-J of FIG. 4;

FIG. 8 is a perspective view of the valve body of FIG. 1;

FIG. 9 is an exploded schematic view of another embodiment of the control valve of the present invention;

FIG. 10 is a side schematic view and a partial cross-sectional view taken along B-B of the valve body of FIG. 9;

FIG. 11 is another side view of the valve body of FIG. 9 and a partial cross-sectional view taken along E-E;

FIG. 12 is a schematic cross-sectional view taken along line C-C of FIG. 11;

FIG. 13 is an exploded view of the closure member of FIG. 9;

FIG. 14 is a schematic structural view of yet another embodiment of a control valve of the present invention;

FIG. 15 is a side schematic view and a partial cross-sectional view taken along D-D of the valve body of FIG. 14;

FIG. 16 is a schematic flow diagram of fluid flow in accordance with an embodiment of the air conditioning system of the present invention;

FIG. 17 is a schematic view of another flow direction of fluid in an embodiment of the air conditioning system of the present invention.

Detailed Description

Referring to fig. 1 to 8, fig. 1 to 8 are schematic views of an embodiment of a control valve, and fig. 1 and 2 are schematic views illustrating a structure of a control valve 100, wherein the control valve 100 includes a power head assembly 10, a valve body 20, a transmission rod 30, a valve core assembly 40, an adjustment seat assembly 50, and a stop member 90. From the valve body configuration illustrated in fig. 1, the control valve 100 may be an expansion valve with a shut-off feature, such as a thermostatic expansion valve, an electronic expansion valve, or other type of expansion valve.

The valve body 20 includes a first port 2011, a second port 2012, a third port 2013, a fourth port 2014, and a first valve bore 2015, wherein fluid may enter the first port 2011, exit the second port 2012 after passing through the first valve bore 2015, enter the third port 2013, and exit the fourth port 2014; fluid may also enter from the fourth port 2014, exit from the third port 2013, enter from the second port 2012, and exit from the first port 2011. The control valve may be used for bi-directional flow of fluid.

Taking the valve body structure illustrated in fig. 1 as an example, the valve body 20 includes a first side portion 2021, a second side portion 2022, a third side portion 2023, and a fourth side portion 2024, the first side portion 2021 is disposed opposite to the second side portion 2022, the first side portion 2021 is disposed with a first port 2011, the second side portion 2022 is disposed with a second port 2012, the third side portion 2023 is adjacent to the first side portion 2021, the third side portion 2023 is adjacent to the second side portion 2022, the fourth side portion 2024 is disposed opposite to the third side portion 2023, the fourth side portion 2024 is adjacent to the first side portion 2021, and the fourth side portion 2024 is adjacent to the second side portion 2022.

The valve body 20 includes a first channel 2051, the first channel 2051 communicates with the second port 2012, a wall portion corresponding to the first channel 2051 includes a first inner wall 205, and the valve body 20 opens a first valve hole 2015 on the first inner wall 205.

Referring to fig. 4, the valve body 20 includes a second passage 208, the second passage 208 communicates with the first port 2011, and the valve body 20 includes a second inner wall 209, and the second inner wall 209 is a portion of a wall portion corresponding to the second passage 208.

The valve body 20 includes a side cavity 203, an opening side of the side cavity 203 is located at the third side 2023, the valve body 20 at least has a second valve hole 2041c and a side hole 2041b opened on a wall 204 corresponding to the side cavity 203, the second valve hole 2041c is communicated with the second port 2012, the second valve hole 2041c is communicated with the first passage 2051, and the side hole 2041b is communicated with the first port 2011.

The wall portion 204 corresponding to the side cavity 203 has a bottom wall 2041 and a side wall 2042, the bottom wall 2041 is opposite to the opening side of the side cavity 203, the valve body 20 is provided with a second valve hole 2041c and a side hole 2041b on the bottom wall 2041, the valve body 20 includes the second valve hole 2041c and a side hole 2041b, the second valve hole 2041c is a linear hole, the second valve hole 2041c is orthogonal to the bottom wall 2041, the side hole 2041b is a linear hole, and the side hole 2041b is orthogonal to the bottom wall 2041.

With the central axis of the side cavity 203 as the center direction, the center line of the second valve hole 2041c is parallel to or coincides with the center direction, and the center line of the side hole 2041b is parallel to or coincides with the center direction. Thus, the second valve hole 2041c and the side hole 2041b can be easily processed.

It should be understood that the open side of the side cavity 203 may be located at other side portions, the second valve hole 2041c may be opened at the side wall 2042, and the opening directions of the second valve hole and the side hole may not be parallel to the central direction.

Of course, as other embodiments, the valve body includes second valve opening and side opening, the second valve opening with the diapire quadrature sets up, the valve body is in the lateral wall is seted up the side opening, the side opening with the diapire angulation sets up.

As another embodiment, the valve body may be opened with another port, and for example, another port may be provided in addition to the second valve hole 2041c and the side hole 2041b, and the other port may communicate with the first port 2011.

In addition, because the opening side of side chamber is located the third side, and first port is located first side, and the second port is located the second side, and it is more convenient to process, and the runner processing is less to the structure of control valve, for example first valve opening structure, structure influence such as regulation seat, in addition, because the part is embedded into the valve body by the end, it is less to the overall structure size influence of valve body, and control valve overall structure is compact, and the size is small and exquisite, and weight is lower.

Referring to fig. 3 and 7 in combination, in the present embodiment, the control valveThe maximum throttle area of 3-19.6mm²The flow area of the first valve hole is smaller than that of the second port, the flow area of the first valve hole is not smaller than the throttling area, the first valve hole is larger than or equal to the side hole, the first inner wall 205 comprises a first wall part 2052 and a second wall part 2053, the valve body 20 is provided with the first valve hole 2015 on the first wall part 2052, the wall part corresponding to the second valve hole comprises a third wall part 2054, the second wall part 2053 connects the first wall part 2052 and the third wall part 2054, the inner diameter of the third wall part 2054 is smaller than that of the second wall part 2053, and due to the fact that the third wall part 2054 and the second wall part 2053 form an angle, a certain resistance exists when fluid enters the third wall part 2054 through the second wall part to form a channel, so that the inner diameter of the second wall part is set to be larger than that of the third wall part to reduce the flow caused by the flow channel setting to a certain extent. Herein, the throttle area refers to the fitted area between the valve core assembly and the first valve hole, is the actual fluid flow throttle area, and is not limited to the area of the first valve hole. The flow area refers to the orifice fluid flow area of the first valve bore.

Referring to fig. 4, in the longitudinal direction z of the valve body, the first port is lower in height than the second port; the side hole 2041b is communicated with the second passage; the side hole 2041b has a communication orifice 2091, the communication orifice 2091 is located at one end of the side hole 2041b communicating with the second passage, and a distance D1 between a centerline of the communication orifice 2091 and a valve body face where the first port is located is smaller than a distance D2 between the centerline of the first valve hole and the valve body face where the first port is located. Thus, as fluid enters the valve body from the second port 2012, the fluid flushes the seal between the valve core and the second valve bore, enters the side chamber, then enters the second passage 208 from the side bore via the communication orifice 2091, and then the fluid exits the control valve from the first port, so that the fluid path exiting the first port is relatively open and the pressure drop is relatively low due to the entry of fluid from the second port.

The valve body 20 includes an adjusting seat cavity 206, at least a portion of the adjusting seat assembly 50 is located in the adjusting seat cavity 206, the valve core assembly is located in the adjusting seat cavity 206, the second channel 208 is communicated with the adjusting seat cavity 206, after the valve core assembly is driven by the driving rod to act, the valve core assembly can be communicated or stopped to be communicated with the adjusting seat cavity and the first channel after being matched with the first valve hole, the second channel is communicated with the adjusting seat cavity, or the valve core assembly can be communicated or stopped to be communicated with the first channel and the second channel after being matched with the first valve hole, and the communication hole 2091 is located between the adjusting seat cavity 206 and the first port 2011. Therefore, the fluid entering from the second port and flowing out through the communication hole avoids the adjusting seat cavity and the part structure in the adjusting seat cavity, and the pressure drop is relatively small. The communication aperture 2091 may be located partially in the adjuster pocket 206 or completely in the adjuster pocket, but out of the way of the cartridge assembly.

At least part of the second wall portion 2053 corresponds to the second inner wall 209 in the longitudinal direction z of the valve body 20, i.e. a projection of at least part of the second wall portion 2053 in the longitudinal direction of the valve body 20 will fall on the second inner wall 209, and a projection of the second inner wall 209 in the longitudinal direction of the valve body 20 will also fall on the second wall portion 2053, and the inner diameter of the second wall portion 2053 is smaller than that of the first wall portion 2052, which helps to ensure the thickness of the valve body wall portion at the position of the second wall portion 2053 opposite to the second inner wall 209, and helps to stabilize the valve body.

The adjusting seat assembly 50 includes a base 501, a spring 502, and a vibration-proof member 503, and an outer wall of the base 501 is fixed to a wall portion corresponding to the adjusting seat cavity 206, for example, by screwing. The base 501 comprises an inner cavity, most of the spring 502 is located in the inner cavity, one end of the spring 502 abuts against the base 501, and part of the anti-vibration component 503 is sleeved outside part of the structure of the valve core assembly.

Further, the bottom wall 2041 includes a boss 2041a, the valve body 20 is provided with a second valve hole 2041c on the boss 2041a, and the boss 2041a is provided to cooperate with the stopping component 90, so as to seal the second valve hole 2041 c.

The cut-off component 90 includes a valve core portion 60 and a base portion 70, the valve core portion 60 is disposed corresponding to the second valve hole 2041c, the valve core portion 60 is larger than the second valve hole 2041c, that is, the valve core portion 60 at least has a size larger than the area of the second valve hole 2041c, and the valve core portion 60 can cover the second valve hole 2041c, the base portion 70 is disposed in a limiting manner with the valve core portion 60, and the base portion 70 is fixed with the valve body 20.

The valve core portion 60 includes a flap 601 and a bracket 602, the wall portion 204 corresponding to the side cavity 203 has an annular wall 2043 corresponding to the second valve hole 2041c, the flap 601 has a rigidity smaller than that of the annular wall 2043, and the flap 601 is larger than the second valve hole 2041 c. For example, the baffle 601 may be made of nylon, resin, rubber, etc., the valve body 20 may be made of metal, such as aluminum alloy or stainless steel, etc., and the annular wall 2043 may also be made of metal, such as aluminum alloy or stainless steel, etc. When the valve body 20 is made of a non-metal material, such as plastic, the baffle 601 may be made of nylon, resin, rubber, or the like, the annular wall 2043 may be integrally provided with the plastic valve body, and the annular wall 2043 may also be made of metal, such as aluminum alloy or stainless steel. The sealing at the second valve hole 2041c is facilitated by the close contact of the two materials different in rigidity.

The support 602 comprises a head part 6021 and a long diameter part 6026, the head part 6021 is positioned at the end part of the support 602, the baffle plate 601 is accommodated in the space enclosed by the head part 6021, the perpendicular projection of the head part 6021 on the bottom wall 2041 covers the second valve hole 2041c, the head part 6021 is arranged opposite to the wall part corresponding to the side cavity 203, the head part 6021 is provided with an arc-shaped section 6023, and at least part of the arc-shaped section 6023 is abutted to the baffle plate 601. The head portion 6021 may be made of metal, and the arc-shaped portion 6023 limits the periphery of the blocking piece 601 to prevent the blocking piece 601 from falling off.

The height of the arc-shaped segment 6023 in the axial direction of the valve core portion 60 is higher than that of the baffle plate 601, at least part of the side wall of the arc-shaped segment 6023 is arranged against the baffle plate 601, the arc-shaped segment 6023 has a base segment 6023a and an outer extension segment 6023b, the outer extension segment 6023b is opposite to the base segment 6023a and is close to the wall portion (i.e. the bottom wall 2041) where the second valve hole 2041C is located, the perpendicular projection of at least part of the outer extension segment 6023b in the axial direction C of the valve core portion 60 falls on the baffle plate 601, and the minimum inner diameter of the outer extension segment 6023b is smaller than the outer diameter of the baffle plate 601, so that the arc-shaped segment 6023 can effectively fix the baffle plate 601 through the base segment 6023a and the outer. The axial direction of the valve core portion 60 may also be a direction from the opening of the side cavity to the bottom wall of the side cavity, that is, a machining direction of the side cavity.

Wherein at least part of the sidewall of the arcuate section 6023 is disposed against the dam 601, and the sidewall of the base section or the extension section is disposed against the dam 601. In this context, the long diameter portion is defined as being longer than the head portion.

The bottom wall 2041 comprises a boss 2041a, the boss 2041a is provided with a second valve hole 2041c, and the distance between the baffle plate 601 and the arc-shaped section 6023 is less than the protruding height of the boss 2041 a. The distance between the blocking plate 601 and the arc-shaped section 6023 is especially the maximum distance between the blocking plate 601 and the arc-shaped section 6023, so that when the blocking plate 601 is matched with the boss 2041a oppositely, the sealing performance between the blocking plate 601 and the boss 2041a can still be ensured.

Specifically, the vertical projection of the extension section 6023b in the direction toward the boss 2041a falls outside the boss 2041a, the extension section 6023b has an outer side portion 6023c near the side of the bottom wall 2041, and the height of the boss 2041a protruding from the bottom wall 2041 is greater than the distance between the baffle plate 601 and the outer side portion 6023c of the extension section 6023b, particularly the maximum distance between the baffle plate 601 and the extension section 6023 b. Therefore, the baffle plate 601 and the boss 2041a can be tightly matched, and the sealing performance is ensured.

Furthermore, the plane size of separation blade 601 is greater than boss 2041a, and the diapire sets up second valve opening and side opening, and the separation blade does not cover the side opening completely in the projection of diapire, and on the one hand, the plane size of separation blade 601 can promote the leakproofness between separation blade and the boss greatly, and on the other hand, the separation blade can not cover the side opening completely in the projection of diapire, further improves the stability of case portion when fluid flows to the second port from first port, and the stability of throttling function's performance is realized to the poppet valve.

The head part 6021 comprises a supporting part 6025, the baffle plate 601 is arranged in contact with the supporting part 6025, and the baffle plate 601 and the supporting part 6025 are arranged in a limiting way, so that the position of the baffle plate 601 is fixed during assembly, the assembly of the stop part is facilitated, the baffle plate 601 accurately covers the second valve hole 2041c, and the convenience and the accuracy of assembly are further facilitated. The support portion 6025 has an opening 6027, the baffle 601 has a projection 6011, and the projection 6011 projects into the opening 6027, which helps to ensure the position of the baffle 601 when fixed with the support portion 6025.

The base part 70 comprises a spring 701 and a base 702, the base 702 comprises a groove 7021, the center line of the groove 7021 is parallel to or coincided with the center line of the second valve hole, the center line of the groove 7021 is parallel to or coincided with the center line of the side cavity, at least part of the spring 701 is located in the groove 7021, at least part of the spring 701 is limited with the valve core part 60, and the base 702 is fixedly arranged with the valve body 20. Thus, when the stop member is assembled with the valve body 20, the spring 701 and the base 702 can be arranged in a limiting manner, and the valve core portion 60 and the spring 701 can be arranged in a limiting manner, so that the stop member can be accurately installed in the side cavity of the valve body 20 during assembly, the valve core portion 60 can be accurately positioned, and the integrity of the peripheral wall portion of the second valve hole 2041c can be maintained to a certain extent.

Specifically, at least a portion of the spring 701 abuts against the support portion 6025, and at least a portion of the spring 701 abuts against the base 702; at least part of the spring 701 is positioned in a space surrounded by the long diameter part 6026, the long diameter part 6026 is sleeved outside the spring 701, a small gap is arranged between the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021, the gap between the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021 is 0.2mm-0.9mm, the gap between the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021 is far smaller than the depth of the long diameter part 6026 extending into the groove 7021, and the long diameter part 6026 and the side wall 7025 of the groove 7021 can be arranged in a guiding way to help stabilize the movement of the valve core part 60. The gap between the outer wall of the long diameter portion 6026 and the side wall 7025 of the slot 7021 is at least less than 3 times the depth that the long diameter portion 6026 extends into the slot 7021.

More specifically, the long diameter portion 6026 is hollow, at least a part of the spring 701 is accommodated in the long diameter portion 6026, and the spring 701 is disposed with a small gap from the long diameter portion 6026, the center line of the base 702 is taken as the center line, the angle a of inclination of the spool portion 60 with respect to the center line is between 0 ° and 15 °, the outer diameter of the long diameter portion 6026 is larger than the diameter of the stopper plate 601, and the outer diameter of the long diameter portion 6026 is larger than the diameter of the second valve hole 2041 c. Because the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021 are arranged in a small clearance mode, and the spring 701 and the long diameter part 6026 are arranged in a small clearance mode, the limiting of the long diameter part 6026 and the base 702 is accurate, particularly, the inclination angle a of the valve core part 60 relative to the central line is 0-15 degrees, so when the stop component 90 is assembled, the valve core part 60 is limited by the spring 701 and the base 702, the assembly is easier, the stability of the valve core part 60 can be improved, and the abrasion of the valve core part of the peripheral wall part of the second valve hole is reduced to a certain degree.

The head 6021 has a ledge 6028, the perpendicular projection of the ledge 6028 from the base 702 falls outside the groove 7021, the head 6021 having an outer diameter that is greater in size than the inner diameter of the groove 7021; when the head 6021 moves in the direction of the groove 7021, the lug 6028 always extends out of the side wall 7025 of the groove 7021, and contributes to smooth movement of the support part 6025, thereby improving sealing performance.

The head portion 6021 includes a support surface 6025a, the support surface 6025a surrounds the arc-shaped section 6023, the support surface 6025a extends outward from the root of the arc-shaped section 6023, the support surface 6025a can provide a limiting point for riveting, and if the support surface 6025a is not provided, the riveting distance of the riveting tool needs to be set by a machine used for the riveting tool, so that the riveting distance is constant, which has a high precision requirement for the riveting tool because the valve core portion 60 has a smaller structure and the valve core portion 60 is arranged to cooperate with the second valve hole 2041c, which can be used for sealing the second valve hole 2041 c.

The base portion 70 includes a threaded section 7023, the threaded section 7023 threadably engages the side wall 2042 of the side cavity, the base 702 includes a slot 7021, and at least a portion of the spring 701 is positioned in the slot 7021. The base part 70 is connected with the valve body through threads, so that the connection is convenient and the assembly is simple; in addition, because the valve core part and the base part have certain limiting effect, in the assembling process of the base part and the valve body, the sealing between the valve core part and the second valve hole is easy to realize and the assembling is easy.

The operating principle of the control valve 100 is: when the control valve is required to realize a throttling function, high-pressure fluid enters from the first port 2011, the power head assembly 10 drives the transmission rod 30, the transmission rod 30 drives the valve core assembly 40 to move in the axial direction of the valve body, the size of the first valve hole is adjusted, so that the fluid enters a first channel after being throttled and then leaves from the second port 2012, when the valve core part 60 covers the second valve hole 2041c, the spring is in a compressed state, the side cavity 203 is not communicated with the first port 2011 and the second port 2012, the third port 2013 enters low-pressure fluid, the power head assembly 10 senses the temperature and pressure of the low-pressure fluid, the size of the first valve hole is adjusted, and the low-pressure fluid leaves from the fourth port 2014; when the control valve is required to realize a reverse conduction function, high-pressure fluid enters from the fourth port 2014, the power head assembly 10 senses the temperature and the pressure of the high-pressure fluid, the power head assembly 10 drives the transmission rod to move upwards to close the first valve hole, the high-pressure fluid leaves from the third port 2013, then the high-pressure fluid enters from the second port 2012, passes through the first channel, enters the side cavity 203 at the second valve hole 2041c and then leaves from the second channel and the first port 2011, at the moment, the valve core part 60 is far away from the second valve hole 2041c, the spring is in a compression state, the side cavity 203 is communicated with the first port 2011 and the second port 2012, and the control valve realizes a large-flow conduction function because the first valve hole is always in a closed state.

As another embodiment, referring to fig. 9-13, fig. 9-13 illustrate a schematic structural view of a control valve 200, the control valve 200 includes a power head assembly 10, a valve body 20, a transmission rod 30, a valve core assembly 40, an adjustment seat assembly 50, and a stop member 90. From the valve body structure illustrated in fig. 9, the control valve 200 may be an expansion valve with a shut-off component, such as a thermal expansion valve, an electronic expansion valve, or other type of expansion valve. The power head assembly 10, the valve body 20, the transmission rod 30, the valve core assembly 40, the adjusting seat assembly 50 and the like refer to the above-mentioned embodiments, and the reference numerals of the similar structures in the following are denoted by the same reference numerals, and the same reference numerals are only for simplicity of illustration and are not limited to the structures in the same way.

The stopping component 90 includes a valve core portion 60 ' and a base portion 70 ', the valve core portion 60 ' is disposed corresponding to the second valve hole 2041c, the valve core portion 60 ' is larger than the second valve hole 2041c, the base portion 70 and the valve core portion 60 ' are disposed in a limiting manner, and the base portion 70 and the valve body 20 are fixedly disposed.

Specifically, the valve core portion 60' includes a stopper 601 and a bracket 602, the bracket 602 includes a head portion 6021 and a long diameter portion 6026, the head portion 6021 includes a support portion 6025, and the stopper 601 is disposed in contact with the support portion 6025.

The baffle plate 601 is in contact with the supporting portion 6025, and the baffle plate 601 and the supporting portion 6025 are in limit arrangement, so that when the stop member is assembled, the position of the baffle plate 601 is fixed, the stop member 601 accurately covers the second valve hole 2041c, and the assembly is more convenient and accurate.

The support portion 6025 has an opening 6027, the baffle plate 601 has a projecting portion 6011, and the projecting portion 6011 projects into the opening 6027, contributing to the prevention of positional deviation when the baffle plate 601 is fixed to the support portion 6025.

The flap 601 is received in a space defined by the head portion 6021, and the head portion 6021 has an arcuate section 6023. The arc-shaped section 6023 limits the periphery of the blocking piece 601 to prevent the blocking piece 601 from falling off. The flap 601 has a stiffness less than that of the annular wall 2043 and the flap 601 is larger than the second valve aperture 2041 c. For example, the baffle 601 may be made of nylon, resin, rubber, etc., the valve body 20 may be made of metal, such as aluminum alloy or stainless steel, etc., and the annular wall 2043 may also be made of metal, such as aluminum alloy or stainless steel, etc. When the valve body 20 is made of a non-metal material, such as plastic, the baffle 601 may be made of nylon, resin, rubber, or the like, the annular wall 2043 may be integrally provided with the plastic valve body, and the annular wall 2043 may also be made of metal, such as aluminum alloy or stainless steel. The sealing at the second valve hole 2041c is facilitated by the close contact of the two materials different in rigidity.

The bottom wall 2041 comprises a boss 2041a, the boss 2041a is provided with a second valve hole 2041c, and the distance between the baffle plate 601 and the arc-shaped section 6023 is less than the protruding height of the boss 2041 a. The distance between the blocking plate 601 and the arc-shaped section 6023 is especially the maximum distance between the blocking plate 601 and the arc-shaped section 6023, so that when the blocking plate 601 is relatively matched with the boss 2041a, the sealing performance between the blocking plate 601 and the boss 2041a can be ensured to a certain extent.

The base portion 70 'includes a spring 701 and a base 702, the base 702 includes a groove 7021, at least a portion of the spring 701 is located in the groove 7021, at least a portion of the spring 701 is disposed in a position-limited manner with respect to the valve core portion 60', and the base 702 is disposed in a fixed manner with respect to the valve body 20. Therefore, when the stop component is assembled with the valve body 20, the spring 701 and the base 702 can be arranged in a limiting mode, and the valve core portion 60' and the spring 701 can be arranged in a limiting mode.

Specifically, the diameter of the head portion 6021 is larger than the diameter of the long diameter portion 6026, at least part of the spring 701 abuts against the head portion 6021, at least part of the spring 701 is sleeved outside the long diameter portion 6026, the base 702 is provided with a column 7022, the column 7022 is positioned in the middle of the groove 7021, at least part of the long diameter portion 6026 is sleeved outside the column 7022, and the spring 701 is sleeved outside the long diameter portion 6026. The guiding arrangement among the spring 701, the cylinder 7022 and the long diameter portion 6026 facilitates the limiting arrangement of the valve core portion, and during assembly, because the positions of the components are accurately positioned, the assembly is easier, which is beneficial to maintaining the integrity of the peripheral wall portion of the second valve hole 2041c to a certain extent, and reducing the possibility of abrasion.

The long diameter part 6026 is hollow, and at least a part of the column 7022 is accommodated in the long diameter part 6026, the long diameter part 6026 has a side port 6026a, and the side port 6026a penetrates the long diameter part 6026; the outer diameter of the long diameter portion 6026 is smaller than the spring 701, when the stop member is in a closed state, that is, the blocking plate 601 closes the second valve hole 2041c, the control valve 200 has a throttling function, fluid enters from the first port 2011, passes through the first valve hole and then leaves from the second port 2012, because the first port 2011 is communicated with the side hole 2041b, the fluid can enter the side cavity 203, the side cavity 203 is filled with high-pressure fluid entering from the first port, and at this time, the hollow position of the long diameter portion 6026 is filled with the high-pressure fluid. When the control valve needs to realize the reverse conduction function, low-pressure fluid enters the control valve from the second port 2012, the low-pressure fluid needs to overcome the potential energy for moving the valve core portion 60 to the base 702, and due to the arrangement of the side port of the long-diameter portion 6026, the pressure of the high-pressure fluid in the inner cavity of the long-diameter portion is released, so that the low-pressure fluid pushes away the valve core portion 60 more easily, the reverse conduction function is also realized more easily to a certain extent, and the stability of the performance is facilitated.

On the other hand, the outer diameter of the head 6021 is greater than the inner diameter of the groove 7021, so that the valve core is difficult to enter the groove 7021 during the movement process, the accurate positioning of the valve core and the groove 7021 is ensured to a certain extent, and the stability of the performance is facilitated.

The head portion 6021 includes a support surface 6025a, the support surface 6025a surrounds the arc-shaped section 6023, the support surface 6025a extends outward from the root of the arc-shaped section 6023, the support surface 6025a can provide a limiting point for riveting, and if the support surface 6025a is not provided, the riveting distance of the riveting tool needs to be set by a machine used for the riveting tool, so that the riveting distance is constant, which has a high precision requirement for the riveting tool because the valve core portion 60 has a smaller structure and the valve core portion 60 is arranged to cooperate with the second valve hole 2041c, which can be used for sealing the second valve hole 2041 c.

Referring to fig. 14, 15, and 14, which are schematic structural views of still another embodiment of the control valve 300, the control valve 300 includes a power head assembly 10, a valve body 20, a transmission rod 30, a valve core assembly 40, an adjustment seat assembly 50, and a stop member 90. From the valve body structure illustrated in fig. 14, the control valve 300 may be an expansion valve with a shut-off component, such as a thermostatic expansion valve, an electronic expansion valve, or other type of expansion valve. The power head assembly 10, the valve body 20, the transmission rod 30, the valve core assembly 40, the adjusting seat assembly 50 and the like refer to the above-mentioned embodiments, and the reference numerals of the similar structures in the following are denoted by the same reference numerals, and the same reference numerals are only for simplicity of illustration and are not limited to the structures in the same way.

The arcuate segment 6023 has a base segment 6023a and an extension segment 6023b, the extension segment 6023b is opposite to the wall portion (i.e., the bottom wall 2041) where the base segment 6023a is close to the second valve hole 2041c, at least a portion of the base segment 6023a is disposed against the baffle plate 601, the extension segment 6023b extends out of the baffle plate 601, the base segment of the arcuate segment is located outside the baffle plate, and a vertical projection of at least a portion of the extension segment 6023b in the center direction of the valve core portion 60 falls on the baffle plate 601.

The valve body 20 has a rim 207, the rim 207 extending from the side wall 2042, an extended end 2071 of the rim 207 abutting the outer wall of the base 702.

The processing method of the control valve comprises the following steps:

drilling a first side of the valve body blank to form the first port;

drilling a second side of the valve body blank to form the second port;

drilling a third side of the valve body blank to form a side cavity;

milling the wall part corresponding to the side cavity to form a step, and drilling the center of the step to form the second valve hole;

and drilling holes at the position of the wall part corresponding to the side cavity deviating from the center to form the side hole.

The above-mentioned control valves can be used in an air conditioning system, which may be a heat pump system, referring to fig. 16 and 17, the air conditioning system 500 includes a first heat exchanger 80, a second heat exchanger 81, a compressor 82, a fluid switching device 83, and control valves 100, two control valves 100 are provided, the control valves 100 are defined as a first valve 100a and a second valve 100b, the fluid switching device 83 has a first port 83a, a second port 83b, a third port 83c, and a fourth port 83d, the first heat exchanger 80 has a first port 80b and a second port 80a communicated therewith, the second heat exchanger 81 has a first port 81b and a second port 81a communicated therewith, the first port 82a of the compressor 82 communicates with the second port 83b of the fluid switching device 83, the third port 83c of the fluid switching device 83 communicates with the fourth port 2014 of the first valve 100a, the third port 2013 of the first valve 100a communicates with the second port 80a of the first valve 80, the first port 80b of the first heat exchanger 80 communicates with the second port 2012 of the first valve 100a, the first port 2011 of the first valve 100a communicates with the first port 2011 of the second valve 100b, the second port 2012 of the second valve 100b communicates with the first port 81b of the second heat exchanger 81, the second port 81a of the second heat exchanger 81 communicates with the third port 2013 of the second valve 100b, the fourth port 2014 of the second valve 100b communicates with the first port 83a of the fluid switching device 83, and the fourth port 83d of the fluid switching device 83 communicates with the second port 82b of the compressor 82.

When the second heat exchanger 81 is used as an evaporator and the first heat exchanger 80 is used as a condenser, the second port 83b of the fluid switching device 83 communicates with the third port 83c of the fluid switching device 83, and the first port 83a of the fluid switching device 83 communicates with the fourth port 83d of the fluid switching device 83.

When the first heat exchanger 80 is used as an evaporator and the second heat exchanger 81 is used as a condenser, the first port 83a of the fluid switching device 83 communicates with the second port 83b of the fluid switching device 83, and the third port 83c of the fluid switching device 83 communicates with the fourth port 83d of the fluid switching device 83.

It should be noted that the air conditioning system 500 illustrates only two control valves 100, but the air conditioning system may have not only two control valves 100 but also a plurality of control valves. Fig. 16 and 17 illustrate only the control valve 100, but the control valve 200, the control valve 300, and other embodiments are also applicable to the air conditioning system.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.