阅读说明：本技术 热交换器及具有其的空调器 (Heat exchanger and air conditioner with same ) 是由 董旭 王飞 周枢 费兆军 吴剑 于 2019-11-18 设计创作，主要内容包括：本发明涉及热交换器及具有其的空调器。本发明提供了一种热交换器包括：液分离主管,其内限定有沿其长度方向延伸的气液分离通道；换热部,所述换热部具有多个冷媒通道；每个所述冷媒通道的一端连通所述气液分离通道；且多个所述冷媒通道在所述气液分离通道的轴向方向上的至少两个部位处与所述气液分离通道进行连接；以及连接管路,其一端连接于所述气液分离通道的一端,且每个所述冷媒通道的另一端与所述连接管路的连接于所述气液分离通道的一端连通。本发明还提供了一种具有上述热交换器的空调器。该热交换器换热效率高、成本低。(The invention relates to a heat exchanger and an air conditioner with the same. The present invention provides a heat exchanger comprising: a liquid separation main pipe, which is internally provided with a gas-liquid separation channel extending along the length direction; a heat exchanging part having a plurality of refrigerant channels; one end of each refrigerant channel is communicated with the gas-liquid separation channel; the refrigerant channels are connected with the gas-liquid separation channel at least two positions in the axial direction of the gas-liquid separation channel; and one end of the connecting pipeline is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is communicated with one end of the connecting pipeline, which is connected to the gas-liquid separation channel. The invention also provides an air conditioner with the heat exchanger. The heat exchanger has high heat exchange efficiency and low cost.)

1. A heat exchanger, comprising:

a gas-liquid separation main pipe, which is internally provided with a gas-liquid separation channel extending along the length direction;

a heat exchanging part having a plurality of refrigerant channels; one end of each refrigerant channel is communicated with the gas-liquid separation channel; the refrigerant channels are connected with the gas-liquid separation channel at least two positions in the axial direction of the gas-liquid separation channel; and

and one end of the connecting pipeline is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is communicated with one end of the connecting pipeline, which is connected to the gas-liquid separation channel.

2. The heat exchanger of claim 1, further comprising:

the gas-liquid separation device comprises one or more gas-liquid separation structures arranged in the gas-liquid separation channel at intervals along the axial direction of the gas-liquid separation channel, and each gas-liquid separation structure is provided with at least one communication hole communicated with two sides of the gas-liquid separation structure.

3. The heat exchanger of claim 1,

the refrigerant channels are arranged into a plurality of groups, each group of refrigerant channels is provided with at least one refrigerant channel, and the diameters of the refrigerant channels are equal;

one end of the gas-liquid separation channel, which is connected with the connecting pipeline, points to the other end of the gas-liquid separation channel and is in a first direction;

the end parts of the multiple groups of refrigerant channels connected to the gas-liquid separation channel are sequentially arranged along the first direction, and the diameters of the refrigerant channels are sequentially increased in the multiple groups of refrigerant channels with the end parts sequentially arranged along the first direction.

4. The heat exchanger of claim 1,

and a communication port is arranged between the connecting pipeline and the gas-liquid separation channel, and the diameter of the communication port is smaller than that of the connecting pipeline.

5. The heat exchanger as claimed in claim 1, wherein each of the refrigerant passages comprises:

a straight passage section extending in an axial direction of the gas-liquid separation passage; and

and a connecting passage section connecting the gas-liquid separation passage and one end of the straight passage section.

6. The heat exchanger of claim 1,

the gas-liquid separation main pipe is positioned at the central position of the heat exchanging part.

7. The heat exchanger of claim 1, further comprising:

a plurality of branches, each of which is connected to one end of the connection pipe connected to the gas-liquid separation channel; each branch is connected with one or more refrigerant channels.

8. The heat exchanger of claim 1,

the heat exchanging part is provided with a plurality of channel pipes, and each channel pipe is internally provided with one refrigerant channel.

9. The heat exchanger of claim 1,

the heat exchanging part is an integrated workpiece and is formed by adopting an extrusion process; or the like, or, alternatively,

the whole formed by the heat exchanging part and the gas-liquid separation main pipe is an integrated workpiece and is formed by adopting an extrusion process; or the like, or, alternatively,

the heat exchanger is an integrated workpiece and is formed by adopting an extrusion process.

10. An air conditioner comprises an evaporator and a condenser, and is characterized in that,

the evaporator and/or the condenser using the heat exchanger as claimed in claims 1 to 9.

Technical Field

The invention relates to the field of refrigeration and heating, in particular to a heat exchanger and an air conditioner with the same.

Background

With the development of science and technology, the development of social economy and the improvement of the living standard of people, high comfort becomes high demand of users, and the air conditioner also becomes an indispensable household appliance in daily life of people. The air-conditioning refrigeration system is mainly formed by connecting a compressor, a condenser, an air-conditioning expansion valve and an evaporator through refrigerant pipelines. When the air conditioner operates in a refrigerating mode, low-temperature low-pressure refrigerant gas is sucked by the compressor and then is changed into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas is released in the outdoor condenser and is changed into normal-temperature high-pressure refrigerant liquid, the normal-temperature high-pressure refrigerant liquid is throttled and reduced in pressure by the air conditioner expansion valve and then is changed into low-temperature low-pressure refrigerant liquid, the low-temperature low-pressure refrigerant liquid refrigerant absorbs heat in the indoor evaporator and is evaporated into low-temperature low-pressure refrigerant gas, then the low-temperature low-pressure refrigerant gas enters. The existing evaporator for air conditioner usually adopts a tube-fin evaporator, and the inventor finds that the existing evaporator is still to be optimized.

Disclosure of Invention

The object of the first aspect of the invention is to provide an optimized heat exchanger.

An object of a second aspect of the present invention is to provide an air conditioner having the above heat exchanger.

According to a first aspect of the invention, the invention proposes a heat exchanger comprising:

a gas-liquid separation main pipe, which is internally provided with a gas-liquid separation channel extending along the length direction;

a heat exchanging part having a plurality of refrigerant channels; one end of each refrigerant channel is communicated with the gas-liquid separation channel; the refrigerant channels are connected with the gas-liquid separation channel at least two positions in the axial direction of the gas-liquid separation channel; and

and one end of the connecting pipeline is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is communicated with one end of the connecting pipeline, which is connected to the gas-liquid separation channel.

Optionally, the heat exchanger further includes one or more gas-liquid separation structures arranged at intervals in the axial direction of the gas-liquid separation passage, and each gas-liquid separation structure is provided with at least one communication hole communicating with both sides of the gas-liquid separation structure.

Optionally, the plurality of refrigerant channels are arranged into a plurality of groups, each group of refrigerant channels has at least one refrigerant channel, and the diameters of the refrigerant channels in each group are equal;

one end of the gas-liquid separation channel, which is connected with the connecting pipeline, points to the other end of the gas-liquid separation channel and is in a first direction;

the end parts of the multiple groups of refrigerant channels connected to the gas-liquid separation channel are sequentially arranged along the first direction, and the diameters of the refrigerant channels are sequentially increased in the multiple groups of refrigerant channels with the end parts sequentially arranged along the first direction.

Optionally, a communication port is arranged between the connecting pipeline and the gas-liquid separation channel, and the diameter of the communication port is smaller than that of the connecting pipeline.

Optionally, each of the refrigerant channels includes:

a straight passage section extending in an axial direction of the gas-liquid separation passage; and

and a connecting passage section connecting the gas-liquid separation passage and one end of the straight passage section.

Alternatively, a plurality of the straight passage sections may be provided outside the gas-liquid separation passage so that the gas-liquid separation main pipe is located at a central position of the heat exchanging portion.

Optionally, the heat exchanger further comprises a plurality of branches, each of which is connected to one end of the connecting line connected to the gas-liquid separation channel; each branch is connected with one or more refrigerant channels.

Optionally, the heat exchanger further comprises a housing; the heat exchanging part and the gas-liquid separation main pipe are arranged in the shell; the shell is a heat-conducting shell; the heat exchanging part is provided with a plurality of channel pipes, and each channel pipe is internally provided with one refrigerant channel.

Optionally, the heat exchanging part is an integrated workpiece and is formed by adopting an extrusion process; or the like, or, alternatively,

the whole formed by the heat exchanging part and the gas-liquid separation main pipe is an integrated workpiece and is formed by adopting an extrusion process;

or the heat exchanger is an integrated workpiece and is formed by adopting an extrusion process.

According to a second aspect of the present invention, there is provided an air conditioner comprising an evaporator and a condenser, the evaporator and/or the condenser employing any one of the heat exchangers described above.

The heat exchanger and the air conditioner have the gas-liquid separation main pipe and the special connection relationship between the gas-liquid separation main pipe and the heat exchange part, so when the heat exchanger is used as an evaporator, after a gas-liquid mixture enters the heat exchanger, saturated steam can directly rise in the gas-liquid separation channel to exchange heat with a refrigerant or air outside the gas-liquid separation main pipe, the refrigerant in the heat exchange part absorbs heat and is gasified, rises and gathers, and is discharged out of the heat exchange part through the connecting pipeline. Of course, the heat exchanger may also be used as a condenser. For example, the heat exchanger is used as an indoor heat exchanger of an air conditioner, as an evaporator in cooling in summer, and as a condenser in heating in winter.

Furthermore, in the heat exchanger, the gas-liquid spacing structure can be arranged to ventilate through the communication holes, so that the refrigerant liquid is blocked, and the heat exchange performance is further improved.

Furthermore, in the heat exchanger, the inner flow channel of the heat exchange part and the gas-liquid separation main pipe can form an approximate vein structure, namely a vein bionic flow channel structure is formed, so that small pressure loss shunting in the flow direction of refrigerant liquid is realized, and turbulent heat exchange is enhanced. Furthermore, the gas-liquid partition plate intermittently separates and blocks, gas-liquid separation, turbulent heat exchange and pressure loss reduction are considered, the diameter of the vein is gradually reduced along the flowing direction, the air duct is gradually enlarged, the output of air quantity and cold quantity to users is facilitated, and the energy conservation of the fan is facilitated.

Further, the inventors of the present invention have also found that: the existing tube-fin evaporator has the disadvantages of large volume, high cost, complicated production flow, large local resistance of a refrigerant pipeline such as an elbow and influence on the improvement of heat exchange performance; and because the heat transfer area is too big, rely on the convection heat transfer intensity that fan disturbance air flows not enough. The heat exchanger with gas-liquid separation of the present invention can solve these problems. The heat exchanger has the advantages that part or all of components of the heat exchanger are integrally extruded and molded, namely integrally molded, and the structure of the heat exchanger can optimize the airflow organization of the heat exchanger, improve the convective heat transfer intensity, reduce the local resistance of a refrigerant pipeline such as an elbow, improve the heat transfer coefficient, achieve the purposes of reducing the production cost, reducing the production flow (integrally extruded and integrally molded), reducing the occupied space and promote the improvement of the energy efficiency of the air conditioner.

Further, the heat exchanger of the present invention may be connected in series or in parallel with a conventional tube and fin heat exchanger depending on the refrigerant system control scheme and climate conditions of the area where the air conditioner is used.

Furthermore, the heat exchanger can be provided with a heat conduction shell and can be used for radiation heat exchange, convection heat exchange can be adopted in the heat conduction shell, and the heat conduction shell bears part of heating or refrigerating load, so that the blowing feeling of a human body can be reduced and the thermal comfort of the human body can be improved on the premise of ensuring the heating or refrigerating capacity; especially, when heating in winter, the heat radiation and heat exchange can obviously increase the thermal comfort of the human body.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic cross-sectional view of a heat exchanger according to one embodiment of the present invention.

Detailed Description

FIG. 1 is a schematic cross-sectional view of a heat exchanger according to one embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a heat exchanger including a gas-liquid separation main pipe 10, a connection pipe 11, and a heat exchange portion 20. The main gas-liquid separation pipe 10 has a gas-liquid separation passage defined therein and extending along the longitudinal direction thereof. The heat exchanging part 20 has a plurality of refrigerant passages. One end of each refrigerant channel is communicated with the gas-liquid separation channel. And the plurality of refrigerant channels are connected with the gas-liquid separation channel at least two positions in the axial direction of the gas-liquid separation channel. That is, one refrigerant passage is extended or provided at each of a plurality of positions in the axial direction of the gas-liquid separation passage. Further, in order to facilitate the arrangement and layout of the refrigerant channels, the plurality of refrigerant channels are connected to the gas-liquid separation channel at a plurality of locations in the circumferential direction of the gas-liquid separation channel. For example, by disposing the gas-liquid separation main pipe 10 at the center of the heat exchanging portion 20 in this manner, the heat exchanger can be made compact, small, and easy to machine. One end of the connecting pipeline 11 is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is communicated with one end of the connecting pipeline 11 connected to the gas-liquid separation channel.

When the heat exchanger is used as an evaporator, the end of the gas-liquid separation passage away from the connection pipe 11 may be a refrigerant inlet. When the heat exchanger is used as an evaporator, after a gas-liquid mixture-shaped refrigerant enters the heat exchanger, saturated vapor can directly rise in the gas-liquid separation channel to exchange heat with the refrigerant or air outside the gas-liquid separation main pipe 10, the refrigerant in the heat exchange part 20 absorbs heat, is gasified, rises and converges, and is discharged out of the heat exchange part 20 through the connecting pipeline 11, so that the energy efficiency can be improved.

In some preferred embodiments of the present invention, the heat exchanger further includes a gas-liquid separation structure 30 disposed in the gas-liquid separation passage, and the gas-liquid separation structure 30 has at least one communication hole communicating both sides thereof. The gas-liquid spacing structure 30 may be a spacer plate having a communication hole formed therein. Alternatively, the gas-liquid separation structure 30 may be formed of projections extending from the gas-liquid separation channel wall, with communication holes provided between or on the projections. The gas-liquid spacing structure 30 can be ventilated through the communication hole to block the refrigerant liquid, so that the heat exchange performance is further improved. Preferably, the gas-liquid separation structure 30 may be plural, spaced in the axial direction of the gas-liquid separation passage, and for example, in the embodiment shown in fig. 1, the gas-liquid separation structure 30 may be two.

In some embodiments of the present invention, each refrigerant channel may include a straight channel section 21 and a connecting channel section 22. The straight passage section 21 extends in the axial direction of the gas-liquid separation passage. The connecting passage section 22 connects the gas-liquid separation passage and one end of the straight passage section 21. A plurality of straight passage sections 21 are provided outside the gas-liquid separation passage. The heat exchanger further includes a plurality of branches 23, and each branch 23 is connected to one end of the connecting line 11 connected to the gas-liquid separation passage. Each branch 23 is connected to one or more refrigerant channels. Each refrigerant channel and the gas-liquid separation channel can form an approximate vein structure, namely a vein bionic flow channel structure is formed, small pressure loss shunting in the refrigerant liquid flowing direction is realized, and turbulent heat exchange is enhanced. The connecting passage section 22 may extend from the gas-liquid separation passage first toward the connecting pipe 11 and then toward the corresponding straight passage section 21. The extension paths of the plurality of connecting channel segments 22 may not be uniform.

Specifically, in some embodiments, the heat exchanging part 20 has a plurality of channel tubes, and each channel tube has a refrigerant channel therein. In other embodiments, the heat exchanging portion 20 further includes a plurality of heat exchanging plates, which are sequentially disposed at intervals outside the gas-liquid separation main pipe 10 along a circumferential direction of the gas-liquid separation main pipe 10, and each of the heat exchanging plates is provided with a plurality of refrigerant channels.

In some preferred embodiments of the present invention, the plurality of refrigerant channels are arranged in a plurality of groups, each group of refrigerant channels has at least one refrigerant channel, and each group of refrigerant channels has an equal diameter. The other end of the gas-liquid separation channel, which is connected with one end of the connecting pipeline 11 and points to the gas-liquid separation channel, is in the first direction. The end parts of the multiple groups of refrigerant channels, which are connected to the gas-liquid separation channel, are sequentially arranged along the first direction, and the diameters of the refrigerant channels are sequentially increased in the multiple groups of refrigerant channels, which are sequentially arranged along the first direction. For example, the refrigerant passages are divided into a plurality of groups by the gas-liquid partition structure 30 as a boundary. In some alternative embodiments, each refrigerant channel is a group.

Each refrigerant channel and the gas-liquid separation channel can form an approximate vein structure, namely a vein bionic flow channel structure is formed, small pressure loss shunting in the refrigerant liquid flowing direction is realized, and turbulent heat exchange is enhanced. The intermittent separation of the gas-liquid partition plate gives consideration to gas-liquid separation, turbulent heat exchange and pressure loss reduction, the diameter of the vein is gradually reduced along the flowing direction, the air duct is gradually enlarged, the output of air quantity and cold quantity to users is facilitated, and the energy conservation of the fan is facilitated.

In some embodiments of the present invention, the gas-liquid separation channel has a diameter larger than that of the refrigerant channel. A communication port 12 is provided between the connecting line 11 and the gas-liquid separation passage, and the diameter of the communication port 12 is smaller than that of the connecting line 11. Specifically, the end of the gas-liquid separation channel connected to the connection pipeline 11 is provided with a tapered groove, and the center of the tapered groove is provided with the communication port 12, so that gas-liquid separation is performed better, the refrigerant can flow conveniently, and the energy efficiency is improved.

In some embodiments of the invention, the heat exchanger further comprises a housing 40. The heat exchanging unit 20 and the gas-liquid separation main pipe 10 are provided in the casing 40, and air flows through the casing 40, thereby improving the heat exchanging efficiency of the heat exchanging unit 20. Preferably, the shell 40 is a heat-conducting shell and can be used for radiation heat exchange, convection heat exchange can be adopted in the heat-conducting shell 40, and the heat-conducting shell 40 bears a part of heating or cooling load, so that on the premise of ensuring the heating or cooling capacity, the blowing feeling of a human body is reduced, and the thermal comfort of the human body is increased. Especially, when heating in winter, the heat radiation and heat exchange can obviously increase the thermal comfort of the human body.

In some embodiments of the present invention, the heat exchanging portion 20 is a one-piece member and is formed by an extrusion process. In other embodiments of the present invention, the heat exchanging portion 20 and the main gas-liquid separating pipe 10 are integrally formed as a single piece, and are formed by an extrusion process. In still other embodiments of the present invention, the heat exchanger is a one-piece part and is formed using an extrusion process. The heat exchanger has the advantages that the whole or all components of the heat exchanger are integrally extruded and molded, namely integrally molded, the structure of the heat exchanger can optimize the airflow organization of the heat exchanger, the air channels can be arranged at large intervals among the refrigerant channels, the convective heat transfer intensity is improved, the local resistance of refrigerant pipelines such as elbows is reduced, the heat transfer coefficient is improved, the purposes of reducing the production cost, reducing the production flow (integrally extruded and integrally molded) and reducing the occupied space are achieved, and the improvement of the energy efficiency of an air conditioner is promoted.

When the heat exchanger works, the heat exchanger is used as an indoor heat exchanger, when refrigerating, gas-liquid two-phase refrigerant enters the gas-liquid separation channel of the heat exchanger from one end, far away from the connecting pipeline 11, of the gas-liquid separation channel, then is radially distributed to each straight channel section 21 through the connecting channel section 22, and enters the branch 23 and the connecting pipeline 11 to flow out of the heat exchanger to enter a compressor along with the heat absorption and evaporation of the refrigerant in the connecting channel section 22 and the straight channel section 21. At least part of the gaseous refrigerant in the gas-liquid separation channel can directly enter the connecting pipeline 11 upwards, and the liquid refrigerant in the refrigerant from the branch 23 can also fall into the gas-liquid separation channel downwards. During heating, high-temperature gaseous refrigerant enters the heat exchanger through the connecting pipeline 11, flows to the heat exchange part 20 at the top of the heat exchanger, releases heat of the refrigerant, is condensed into liquid, and flows to a downstream throttling device and other parts through one end of the gas-liquid separation channel, which is far away from the connecting pipeline 11.

The embodiment of the invention also provides an air conditioner which can comprise a compressor, a condenser, a throttling device and an evaporator. The evaporator and/or the condenser employ the heat exchanger of any of the embodiments described above. Preferably, only the evaporator employs the heat exchanger of any of the embodiments described above. Further, one end of the case 40 of the heat exchanger may be provided with a blower fan to force air into the inside of the case 40 to exchange heat with the heat exchanging part 20.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.