阅读说明：本技术 电磁阀一体型膨胀阀 (Solenoid valve integrated expansion valve ) 是由 天池将太郎 于 2020-04-02 设计创作，主要内容包括：提供一种操作性优异的电磁阀一体型膨胀阀(1)。电磁阀一体型膨胀阀(1)具有：具备阀室(12)的阀主体(10)；通过落座于阀座(14)来限制流体从所述阀室(12)通向所述出口制冷剂流路(13a),通过从所述阀座(14)远离来容许所述流体通过的阀芯(30)；对所述阀芯(30)朝向所述阀座(14)施力的螺旋弹簧(34)；一端与所述阀芯(30)抵接的动作棒(70)；安装于所述阀主体(10),并驱动所述动作棒(70)的动力元件(50)；设置于所述阀主体(10),对设置于所述阀室(12)与流出侧通路(13)之间的主阀口(25)进行开放或关闭的电磁阀(100),所述电磁阀(100)具有：固定于所述阀主体(10)的壳体(110)和与向所述电磁阀100)供电的电线(122)连接的连接器(170),所述连接器(170)由从所述阀主体(10)或所述壳体(110)延伸的托架(180)支承。(Provided is a solenoid valve integrated expansion valve (1) having excellent operability. An expansion valve (1) with an integrated solenoid valve comprises: a valve body (10) provided with a valve chamber (12); a valve element (30) that restricts passage of fluid from the valve chamber (12) to the outlet refrigerant flow path (13a) by being seated on a valve seat (14), and allows passage of the fluid by being separated from the valve seat (14); a coil spring (34) that urges the valve element (30) toward the valve seat (14); an operation rod (70) having one end abutting against the valve element (30); a power element (50) attached to the valve main body (10) and driving the operating rod (70); a solenoid valve (100) provided in the valve body (10) and opening or closing a main valve port (25) provided between the valve chamber (12) and an outflow-side passage (13), the solenoid valve (100) comprising: a housing (110) fixed to the valve main body (10), and a connector (170) connected to an electric wire (122) for supplying electric power to the solenoid valve (100), the connector (170) being supported by a bracket (180) extending from the valve main body (10) or the housing (110).)

1. An expansion valve with an integrated solenoid valve, comprising:

a valve body provided with a valve chamber;

a valve element that restricts passage of fluid by seating on a valve seat and allows passage of the fluid by moving away from the valve seat;

a coil spring that urges the valve element toward the valve seat;

an operating rod, one end of which is abutted against the valve core;

a power element attached to the valve main body and driving the operation rod; and

a solenoid valve that opens or closes a main valve port provided between the valve chamber and the outflow-side passage,

the electromagnetic valve has: a housing fixed to the valve main body, a solenoid valve element that is remote from or close to the main valve port, a coil that drives the solenoid valve element, and a connector that is connected to a wire that supplies power to the coil,

the connector is supported by a bracket extending from the valve body or the housing.

2. An integrated expansion valve of a solenoid valve according to claim 1,

the bracket is formed by bending a plate material, one end side of the bracket is fixed to the valve body, and the connector is attached to the other end side of the bracket.

3. An integrated expansion valve of a solenoid valve according to claim 2,

the bracket is bent more than twice.

4. An integrated expansion valve of a solenoid valve according to claim 1,

the housing is formed by bending a sheet of material of which the bracket is a part.

5. An integrated expansion valve of a solenoid valve according to claim 4,

the bracket is bendable relative to the housing.

6. The solenoid valve integrated expansion valve according to claim 4 or 5,

the widthwise edges of the bracket are bent.

Technical Field

The invention relates to an expansion valve integrated with a solenoid valve.

Background

Conventionally, as a solenoid valve integrated expansion valve used in a refrigerant cycle system, for example, an expansion valve described in patent document 1 below is known. The solenoid valve integrated expansion valve includes: a valve seat disposed between the valve chamber and the outlet refrigerant flow path, a valve body that is close to or away from the valve seat, a valve body operating mechanism (power element) that displaces the valve body, a bypass path that communicates the valve chamber with the outlet refrigerant flow path, and an electromagnetic valve that opens and closes the bypass path.

According to such a solenoid valve integrated expansion valve, by opening the bypass passage when the solenoid valve is opened, the force applied to the valve element can be unbalanced, and the valve element can be separated from the valve seat. On the other hand, by closing the bypass passage when the electromagnetic valve is closed, the balance of the forces applied to the valve body can be restored, and the valve body can be driven by the diaphragm operating mechanism.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2006-214722

Technical problem to be solved by the invention

The solenoid valve includes an electric wire for receiving power supply from a control device of the refrigerant cycle system, and the electric wire is connected to a connector (referred to as a valve-side connector). When the solenoid valve integrated expansion valve is assembled to the refrigerant cycle system, the connector is fitted to the counterpart connector, thereby achieving electrical conduction between the control device and the solenoid valve.

Here, the refrigerant cycle system having the solenoid valve integrated expansion valve mounted thereon has various modes, and the position and orientation of the counterpart connector are various. Therefore, conventionally, the valve-side connector and the solenoid valve integrated expansion valve are not fixed, but are oriented in any direction according to the counterpart connector.

Therefore, the valve-side connector is in a state of hanging down from the electric wire due to its own weight, and an operator who assembles the solenoid valve-integrated expansion valve to the refrigerant cycle needs to grip the valve-side connector with one hand and adjust the orientation thereof, and then to fit the valve-side connector to a counterpart connector gripped with the other hand, which is a problem of poor operability.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a solenoid valve integrated expansion valve having excellent operability.

Means for solving the problems

The solenoid valve integrated expansion valve of the present invention comprises:

a valve body provided with a valve chamber;

a valve element that restricts passage of fluid by seating on a valve seat and allows passage of the fluid by moving away from the valve seat;

a coil spring that urges the valve element toward the valve seat;

an operating rod, one end of which is abutted against the valve core;

a power element attached to the valve main body and driving the operation rod; and

a solenoid valve that opens or closes a main valve port provided between the valve chamber and the outflow-side passage,

the electromagnetic valve has: a housing fixed to the valve main body, a solenoid valve element that is remote from or close to the main valve port, a coil that drives the solenoid valve element, and a connector that is connected to a wire that supplies power to the coil,

the connector is supported by a bracket extending from the valve body or the housing.

Effects of the invention

According to the present invention, it is possible to provide a solenoid valve integrated expansion valve having excellent operability.

Drawings

Fig. 1 is a perspective view of a solenoid valve integrated expansion valve according to a first embodiment.

Fig. 2 is a plan view of the solenoid valve integrated expansion valve.

Fig. 3 is a front view of the solenoid valve integrated expansion valve.

Fig. 4 is a side view of the solenoid valve integrated expansion valve.

Fig. 5 is a cross-sectional view of the cross-section taken along line a-a of fig. 4, viewed from the side, with the bracket removed.

Fig. 6 is a plan view of an intermediate product obtained in the process of manufacturing the bracket.

Fig. 7 is a perspective view of a solenoid valve integrated expansion valve according to a second embodiment.

Fig. 8 is a plan view of the solenoid valve integrated expansion valve.

Fig. 9 is a front view of the solenoid valve integrated expansion valve.

Fig. 10 is a side view of the solenoid valve integrated expansion valve.

Detailed Description

Embodiments according to the present invention will be described below with reference to the drawings.

(definition of orientation)

In the present specification, a direction from the valve body toward the operation rod is defined as an "upward direction", and a direction from the operation rod toward the valve body is defined as a "downward direction". Therefore, in the present specification, the direction from the valve core toward the operation rod is referred to as an "upward direction" regardless of the orientation of the expansion valve.

(first embodiment)

Fig. 1 is a perspective view of a solenoid valve-integrated expansion valve 1 according to a first embodiment, fig. 2 is a plan view of the solenoid valve-integrated expansion valve 1, fig. 3 is a front view of the solenoid valve-integrated expansion valve 1, fig. 4 is a side view of the solenoid valve-integrated expansion valve 1, and fig. 5 is a cross-sectional view of a cross-section taken along line a-a in fig. 4, as viewed from a side, with a bracket removed.

(Structure of solenoid valve integrated expansion valve)

In fig. 5, the solenoid valve integrated expansion valve 1 has a valve main body 10 having a substantially square column shape. An inlet refrigerant passage 13 is formed in the lower portion of the valve main body 10, a high-pressure refrigerant from the compressor side of the refrigeration cycle is supplied to the inlet refrigerant passage 13, and the inlet refrigerant passage 13 communicates with a valve chamber 12 formed in the valve main body 10. A spherical valve body 30 is disposed in the valve chamber 12, and the valve body 30 is supported by a coil spring 34 via a support member 32.

The upper end of the valve body 30 abuts against the lower end of the actuating rod 70. The operating rod 70 extends inside the valve main body 10 via the orifice portion 15 connected to the valve seat 14, the sliding portion 17 that guides the operating rod 70, and the return passage 18. A seal member 19 that abuts the operating rod 70 and the valve main body 10 is provided between the slide portion 17 and the return passage 18.

The nut member 40 is screwed into the opening 10d at the lower end of the valve chamber 12, and the nut member 40 seals the opening 10d via the O-ring 36. By tightening the nut member 40, the coil spring 34 is preloaded, and the valve body 30 can be biased upward via the support member 32 with a predetermined elastic force. When the valve is opened, the refrigerant (fluid) in the valve chamber 12 passes between the valve body 30 and the valve seat 14, and flows out to an outlet refrigerant passage 13a (shown by a broken line in fig. 5) formed on the side opposite to the inlet refrigerant passage 13. The refrigerant from the outlet refrigerant passage 13a is sent to an evaporator not shown.

The refrigerant returned from the evaporator flows back to the compressor, not shown, through a return passage 18 provided in the upper portion of the valve main body 10. The temperature of the refrigerant in the return passage 18 is transmitted to the pressure operation chamber PA of the power element 50 attached to the upper portion of the valve main body 10.

The power element 50 provided at the upper end of the valve main body 10 includes a plug 51, an upper cover member 52, a diaphragm 53, a stopper member 54, and a receiving member 55.

An opening 52a is formed in the top of the upper cover member 52 having a substantially conical shape, and the opening 52a can be sealed by a plug 51.

The diaphragm 53 is formed of a thin plate material having a plurality of concentric convexo-concave shapes, and has an outer diameter substantially equal to the outer diameters of the upper cover member 52 and the receiving member 55.

A male screw 55a is provided on the outer periphery of the lower end of a substantially cylindrical receiving member 55 whose upper portion is expanded into a conical shape.

The stopper member 54 has a disc portion 54a and a cylindrical portion 54b, and the cylindrical portion 54b is coaxially joined to the lower surface of the disc portion 54 a. A fitting hole 54c is formed in the center of the lower end of the cylindrical portion 54 b.

The assembly sequence of the power element 50 will be explained. The outer peripheral portions of the upper lid member 52, the diaphragm 53, and the receiving member 55 are integrated by circumferential welding such as TIG welding, laser welding, or plasma welding, while the outer peripheral portions are overlapped with each other.

Next, after the working gas is sealed in a space (referred to as a pressure working chamber PA) surrounded by the upper lid member 52 and the diaphragm 53 from an opening 52a formed in the upper lid member 52, the opening 52a is sealed by the plug 51, and the plug 51 is fixed to the upper lid member 52 by projection welding or the like.

At this time, the diaphragm 53 receives pressure so as to protrude toward the receiving member 55 by the operating gas sealed in the pressure operating chamber PA, and therefore, the diaphragm 53 is supported in contact with the upper surface of the stopper member 54 disposed in the lower space LS surrounded by the diaphragm 53 and the receiving member 55. In addition, the disk portion 54a of the stopper member 54 is held by the inner surface of the receiving member 55, and therefore, the stopper member 54 does not come out of the power element 50.

When the power element 50 assembled as described above is assembled to the valve main body 10, the male screw 55a on the outer periphery of the lower end of the receiving member 55 is screwed into the female screw 10b formed on the inner periphery of the recess 10a of the valve main body 10. When the male screw 55a is screwed into the female screw 10b, the lower end of the receiving member 55 abuts against the upper end surface of the valve main body 10. Thereby, the power element 50 can be fixed to the valve main body 10. In this state, the lower space LS of the power element 50 communicates with the return flow path 18, i.e., the same internal pressure is established.

At this time, a packing PK is attached between the power element 50 and the valve main body 10, and the refrigerant is prevented from leaking from the recess 10a when the power element 50 is attached to the valve main body 10.

The solenoid valve integrated expansion valve 1 changes the internal pressure of the pressure operation chamber PA in accordance with the pressure and temperature of the refrigerant flowing out of the evaporator and passing through the return passage 18, whereby the diaphragm 53 deforms and drives the operation rod 70. The pressing force of the operating rod 70, the refrigerant pressure in the valve chamber 12, and the biasing force of the coil spring 34 are applied to the valve body 30, and the gap between the valve body 30 and the valve seat 14 is adjusted by the balance of these forces.

Specifically, when the heat load of the evaporator is large, the clearance between the valve element 30 and the valve seat 14 is increased, and a large amount of refrigerant is supplied to the evaporator, and conversely, when the heat load is small, the clearance is decreased, and therefore, the flow rate of refrigerant supplied to the evaporator is decreased.

(magnetic valve)

A solenoid valve 100 is mounted on a side surface portion of the valve main body 10. The solenoid valve 100 has a housing 110 screwed to the valve body 10. The hollow suction member 130 is attached to extend from a bottomed opening 10c formed in the valve main body 10 into the case 110.

The opening 10c communicates with the valve chamber 12 via a communication passage, not shown, in the valve main body 10. Therefore, the pressure in the opening 10c is substantially equal to the internal pressure of the valve chamber 12.

A cylindrical cover 123 connected to the suction tool 130 is disposed at the center of the housing 110, a cylindrical plunger 124 is slidably disposed inside the cover 123, and a valve shaft 140 is slidably inserted into the plunger 124. The spring 142 provided between the plunger 124 and the valve shaft 140 biases the valve shaft 140 in a direction in which the plunger 124 protrudes. Further, the spring 143 disposed between the suction tool 130 and the plunger 124 biases the plunger 124 in a direction away from the suction tool 130.

A pilot valve body 150 is disposed inside the suction member 130 screwed into the opening 10 c. The pilot valve spool 150 includes an annular valve spool 152 made of PTFE and a brass pilot valve main body 154 enclosing the valve spool 152. The pilot valve body 154 has a drain port 154a penetrating therethrough in parallel with the valve spool 152. The valve shaft 140 and the pilot valve core 150 constitute an electromagnetic valve core.

The pilot valve body 150 is held so as to be relatively displaceable along the axis with respect to the suction tool 130, and the coil spring 156 biases the pilot valve body 150 toward the valve shaft 140, so that the pilot valve body 150 abuts against a step portion on the inner periphery of the suction tool 130. The pilot port 158 formed in the center of the valve body 152 faces the conical tip 144 of the valve shaft 140 protruding from the plunger 124.

In the opening 10c, a conduit 24 is provided so as to face the pilot valve body 150. The inside of the conduit 24 constitutes a main valve 25, the main valve 25 is connected to the inlets 10e and 10f, and the inlets 10e and 10f are connected to the outlet refrigerant passage (outflow passage) 13.

As shown in fig. 1 to 4, the case 110 is bent into an Contraband shape by press-forming a single plate material, and the coil 120 is disposed inside the case 110. The coil 120 is connected to one end of two wires 122. The other end of the wire 122 is connected to the connector 170.

The connector 170 includes a resin cylindrical body portion 171, a resin clip portion 172 for attachment to the bracket 180, and a metal terminal (not shown) connected to the electric wire 122 in the cylindrical body portion 171. The clip 172 has a shape in which a plurality of umbrella portions are joined in series, and is provided in a state of being connected to the cylindrical body 171.

(bracket)

Fig. 6 is a plan view of an intermediate product obtained in the process of manufacturing the bracket 180. An intermediate product IM having a substantially L-shape as shown in fig. 6 is formed by punching a single metal plate. The first hole 181 near one end, the second hole 182 near the other end, and the third hole 183 of the intermediate product IM may be formed simultaneously at the time of punching. The first and second holes 181 and 182 are circular, but the third hole 183 has two protrusions 183a protruding from the inner circumference thereof.

The intermediate product IM is bent at a right angle around the first folding line FL1 near the first hole 181. The intermediate product IM is bent by about 150 degrees around the second fold line FL2 in the middle thereof (see fig. 3). Further, the intermediate green body IM is bent at a right angle at the third folding line FL3 near the third hole 183. Thereby forming the bracket 180. Further, the bracket is bent twice or more, whereby the orientation of the connector 170 can be set to an arbitrary three-dimensional direction.

The attachment of the connector 170 to the bracket 180 is performed by inserting the clip 172 into the third hole 183 of the bracket 180. When the clip 172 is inserted into the third hole 183, any of the umbrella portions of the clip 172 is elastically deformed, and thus can pass through the protrusion 183a of the third hole 183. However, when a force is applied in a direction to pull the clip portion 172 out of the third hole 183, the protrusion 183a engages with any of the umbrella portions, thereby preventing the detachment. In addition, the second hole 182 can be used to secure other parts.

The bracket 180 can be attached to the valve body 10 by screwing the screw SC inserted through the first hole 181 of the bracket 180 into the screw hole of the valve body 10. By providing the screw hole into which the screw SC is screwed on the same surface as the screw hole in the valve body 10 to which the housing 110 is screwed, the processing is facilitated.

At this time, the connector 170 attached to the bracket 180 through the third hole 183 is disposed obliquely downward with respect to the valve main body 10 (see fig. 3). By fitting with a mating connector and a connector 170, not shown, it is possible to connect the connector to an external control device via the electric wire 122 so as to supply electric power.

(operation of solenoid valve)

The solenoid valve 100 can open or close communication between the valve chamber 12 and the outlet refrigerant passage 13 a. When the solenoid valve 100 is energized, the coil 120 is excited, and therefore, the plunger 124 approaches the suction tool 130 against the biasing force of the spring 143. Further, the valve shaft 140 held by the plunger 124 is also displaced toward the pilot valve core 150, and the tip 144 of the valve shaft 140 closes the pilot valve port 158.

Thereby, the refrigerant in the opening 10c flows into a space between the valve shaft 140 and the pilot valve core 150 via the drain port 154a, and the pressure in the space increases, so that the pilot valve core 150 is displaced toward the conduit 24 side, and the main valve port 25 is closed. By closing the main valve port 25, the communication between the valve chamber 12 and the outlet refrigerant passage 13a is closed.

At this time, as the actuating rod 70 is displaced in accordance with the action of the diaphragm 53 as described above, the valve body 30 is seated on the valve seat 14 or is separated from the valve seat 14.

On the other hand, when the energization of the solenoid valve 100 is interrupted to cancel the excitation of the coil 120, the plunger 124 is separated from the suction tool 130 by the biasing force of the spring 143. Then, the valve shaft 140 held by the plunger 124 is also displaced in a direction away from the pilot valve body 150, and therefore, the pilot valve port 158 closed by the tip 144 is opened.

Accordingly, more refrigerant than the refrigerant flowing into the space between the valve shaft 140 and the pilot valve core 150 from the drain port 154a flows out from the pilot valve port 158, and therefore the pressure in the space is reduced, the pilot valve core 150 is separated from the conduit 24, and the main valve port 25 is opened. By opening the main valve port 25, the refrigerant in the valve chamber 12 flows toward the outlet refrigerant passage 13 a.

This allows the refrigerant whose flow rate is controlled to circulate even in a state where the valve body 30 is seated on the valve seat 14.

According to the present embodiment, since the connector 170 is attached using the bracket 180 that is bent in three dimensions, the orientation of the connector 170 can be set to an optimum orientation regardless of the posture of the valve body 10. Therefore, when the solenoid valve integrated expansion valve 1 is assembled to the refrigerant cycle system, the operator can easily connect to the counterpart connector without holding the connector 170, and the ease of assembly is improved.

Further, by providing the housing 110 and the bracket 180 as separate bodies, a plate material having a thickness suitable for the clip portion 172 inserted into the third hole 183 can be selected to form the bracket 180. Therefore, even when the specification of the clip portion 172 is changed, the original housing 110 can be used in common. In addition, a screw hole may be formed in the housing 110 to screw one end of the bracket 180.

(second embodiment)

Fig. 7 is a perspective view of a solenoid valve-integrated expansion valve 1A according to a second embodiment, fig. 8 is a plan view of the solenoid valve-integrated expansion valve 1A, fig. 9 is a front view of the solenoid valve-integrated expansion valve 1A, and fig. 10 is a side view of the solenoid valve-integrated expansion valve 1A. The same components as those in the above-described embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.

In the present embodiment, a part of the housing of the solenoid valve also serves as a bracket of the connector. More specifically, the housing 110A of the solenoid valve 100A is formed by press-forming a single metal plate. The housing 110A has: a first plate portion 111 screwed to the valve main body 10, a second plate portion 112 parallel to the first plate portion 111, and a third plate portion 113 connecting end portions of the first plate portion 111 and the second plate portion 112 to each other.

An extension portion 114 is formed by extending a part of the free end side of the second plate portion 112. The extension portion 114 constituting the bracket has a substantially L-shape as shown in fig. 10, and has a base portion 114a provided in a state of being connected to the second plate portion 112, and a widened portion 114b having a width wider than that of the base portion 114 a. A mounting hole 114c having the same shape as the third hole 183 of the first embodiment is formed in the center of the widened portion 114 b.

One side edge linearly continuous over the second plate portion 112, the root portion 114a, and the widened portion 114b is bent to form a common rib 114 d. The other side edge of the root portion 114a is also bent to form a rib 114e, and the other side edge of the widened portion 114b is also bent to form a rib 114 f. The formation of the ribs 114d, 114e, and 114f improves the rigidity of the housing 110A, and is therefore also advantageous for vibration and the like.

The connector 170 is attached to the housing 110A by inserting the clip 172 into the attachment hole 114c as in the above-described embodiment.

According to the present embodiment, since the housing 110A also serves as a mounting bracket for the connector 170, the number of parts is reduced. Further, since the housing 110A can be formed by press forming, the cost can be kept low even if it also serves as a mounting bracket.

Here, it is difficult to arbitrarily change the shapes and sizes of the first plate portion 111, the second plate portion 112, and the third plate portion 113 in order to hold a coil of a predetermined size. However, for example, at the position of the folding line FL4 shown by the broken line in fig. 7, the base portion 114a can be bent with respect to the second plate portion 112, and thereby the connector 170 can be moved obliquely to an arbitrary position around the folding line FL 4. Further, since the orientation of the connector 170 with respect to the mounting hole 114c (fig. 10) can be arbitrarily changed, the present embodiment also ensures ease of assembly.

The present invention is not limited to the above-described embodiments. Any components of the above-described embodiments may be modified within the scope of the present invention. In the above-described embodiment, any component can be added or omitted.

Description of the symbols

1. 1A solenoid valve integrated expansion valve

10 valve body

12 valve chamber

13 inlet refrigerant passage

13a outlet refrigerant flow path

14 valve seat

24 catheter

30 valve core

50 power element

53 diaphragm

70 action bar

100. 100A electromagnetic valve

110. 110A casing

120 coil

130 suction piece

140 valve shaft

150 pilot valve core

170 connector

180 bracket.