WO2021135990A1

WO2021135990A1 - Heat exchange system

Info

Publication number: WO2021135990A1
Application number: PCT/CN2020/137724
Authority: WO
Inventors: 魏广飞; 邵春宇; 高强; 祁照岗
Original assignee: 杭州三花微通道换热器有限公司
Priority date: 2019-12-31
Filing date: 2020-12-18
Publication date: 2021-07-08

Abstract

A heat exchange system. The heat exchange system comprises a compressor (1), a first heat exchanger (3), a throttling element (4), a second heat exchanger (5), and a flow direction conversion element (2); the compressor (1) is connected to the first heat exchanger (3) and the second heat exchanger (5) by means of the flow direction conversion element (2), separately; the throttling element (4) is connected between the first heat exchanger (3) and the second heat exchanger (5). The heat exchange system further comprises a connecting pipe (6) and a heating device (8); the connecting pipe (6) comprises a first opening (61) and a second opening (62), the first opening (61) of the connecting pipe (6) is communicated with a first opening (501) of the second heat exchanger (5) and a second opening (42) of the throttling element (4), the second opening (62) of the connecting pipe (6) is communicated with a second opening (502) of the second heat exchanger (5), and the second opening (62) of the connecting pipe (6) is communicated with a second opening (102) of the compressor (1) by means of the flow direction conversion element (2); the heating device (8) is disposed on the connecting pipe (6).

Description

Heat Exchange System

Cross-references to related applications

This application requires the priority and rights of Chinese patent applications with application numbers of 201911417896.2 and 201922497937.5, and the application date of December 31, 2019. The entire contents of the above Chinese patent applications are hereby incorporated into this application by reference.

Technical field

This application relates to the field of heat exchange technology, and more specifically, to a heat exchange system.

Background technique

In the related art, when the microchannel heat exchanger is used as an outdoor heat exchanger, the biggest technical problem is that it is easy to form frost. Compared with the copper tube fin heat exchanger as the outdoor heat exchanger, the micro-channel heat exchanger as an outdoor heat exchanger is prone to frost when operating in the heating mode, which affects the heat exchange. Thermal performance and system energy efficiency.

Summary of the invention

For this reason, the embodiment of the present application proposes a heat exchange system, which delays the frosting speed of the heating mode, which is beneficial to improve the heat exchange performance.

A heat exchange system according to an embodiment of the first aspect of the present application includes a compressor, a first heat exchanger, a second heat exchanger, a throttling member, and a flow direction conversion member, and the compressor includes a first opening and a second opening , The first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, the first The first opening of a heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, the second opening of the first heat exchanger communicates with the first opening of the throttle member, and the The second opening of the throttling element is in communication with the first opening of the second heat exchanger, and the second opening of the second heat exchanger is in communication with the second opening of the compressor through the flow direction conversion element, so When the heat exchange system is working, the heat exchange system is filled with refrigerant, the flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system, and the heat exchange system further includes a connecting pipe and a heating device. The connecting pipe includes a first opening and a second opening. The first opening of the connecting pipe communicates with the first opening of the second heat exchanger and the second opening of the throttle member. The second opening of the second heat exchanger communicates with the second opening of the second heat exchanger, and the second opening of the connecting pipe communicates with the second opening of the compressor through the flow direction converter. The heating device is arranged in the connecting pipe .

According to the heat exchange system of the embodiment of the present application, by providing the connecting pipe and the heating device, and in the heating mode, that is, the frosting condition, the connecting pipe is connected to the first opening of the second heat exchanger and the second opening of the throttle And the second opening of the second heat exchanger and the flow direction conversion element, which can make the refrigerant flowing out through the first heat exchanger and the throttling element enter the flow direction conversion element through the connecting pipe, or the refrigerant in the second heat exchanger can pass from The first opening of the second heat exchanger flows out and flows into the flow direction conversion part through the connecting pipe, and then flows back to the compressor through the flow direction conversion part. The refrigerant no longer enters the flow direction conversion part through the second heat exchanger, and the flow resistance is relatively reduced. Moreover, the heating device is turned on to heat the refrigerant flowing through the connecting pipe to accelerate the vaporization of the liquid refrigerant, increase the evaporation temperature, delay the frosting speed of the heating mode, and improve the heat exchange performance.

A heat exchange system according to an embodiment of the second aspect of the present application includes a compressor, a first heat exchanger, a second heat exchanger, a throttling member, and a flow direction conversion member, and the compressor includes a first opening and a second opening , The first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, the first The first opening of a heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, the second opening of the first heat exchanger communicates with the first opening of the throttle member, and the The second opening of the throttling element is in communication with the first opening of the second heat exchanger, and the second opening of the second heat exchanger is in communication with the second opening of the compressor through the flow direction conversion element, so When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system. The heat exchange system further includes a heating device, and the heating device It is arranged between the second opening of the second heat exchanger and the second opening of the compressor.

According to the heat exchange system of the embodiment of the present application, by setting the heating device, the heating device can be turned on in the heating mode to heat the refrigerant flowing anywhere between the second opening of the second heat exchanger and the second opening of the compressor, It can accelerate the gasification of the liquid refrigerant, increase the evaporation temperature, delay the frosting speed of the heating mode, and improve the heat exchange performance.

A heat exchange system according to an embodiment of the third aspect of the present application includes a compressor, a first heat exchanger, a second heat exchanger, a throttling element, and a flow direction conversion element. The compressor includes a first opening and a second opening, The first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, and the first opening of the first heat exchanger communicates with the flow direction conversion member through the The first opening of the compressor is in communication, the second opening of the first heat exchanger is in communication with the first opening of the throttle, and when the heat exchange system is working, the heat exchange system is filled with refrigerant, so The flow direction conversion element is used to change the flow direction of the refrigerant in the heat exchange system. The second heat exchanger includes a first header, a second header, and a plurality of first heat exchange tubes. The header and the second header are arranged at intervals, a plurality of the first heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one of the first heat exchange tubes is arranged in the length direction of the first header. One end of the upper part is connected to the first header, and the other end of the first heat exchange tube in its length direction is connected to the second header to communicate with the first header And a second header, the first header is in communication with the second opening of the throttle, and the second header is in communication with the second opening of the compressor through the flow direction conversion part, The heat exchange system further includes a heating device, and the heating device is arranged in the first header.

According to the heat exchange system of the embodiment of the present application, by setting the heating device and turning on the heating device in the heating mode to heat the refrigerant flowing through the first header, the refrigerant can be converted from liquid to gaseous refrigerant, thereby accelerating the liquid refrigerant gas It improves the evaporation temperature, delays the frosting speed of the heating mode, and improves the heat exchange performance.

A heat exchange system according to an embodiment of the fourth aspect of the present application includes a compressor, a first heat exchanger, a second heat exchanger, a throttling element, and a flow direction conversion element. The compressor includes a first opening and a second opening, The first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, and the first opening of the first heat exchanger communicates with the flow direction conversion member through the The first opening of the compressor is in communication, the second opening of the first heat exchanger is in communication with the first opening of the throttle, and when the heat exchange system is working, the heat exchange system is filled with refrigerant, so The flow direction conversion element is used to change the flow direction of the refrigerant in the heat exchange system. The second heat exchanger includes a first header, a second header, and a plurality of first heat exchange tubes. The header and the second header are arranged at intervals, a plurality of the first heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one of the first heat exchange tubes is arranged in the length direction of the first header. One end of the upper part is connected to the first header, and the other end of the first heat exchange tube in its length direction is connected to the second header to communicate with the first header And a second header, the first header is in communication with the second opening of the throttle, and the second header is in communication with the second opening of the compressor through the flow direction conversion part, The heat exchange system further includes a first channel, at least part of the first channel is provided in the first header so that the refrigerant in the first channel exchanges heat with the refrigerant in the first header , And when the refrigerant in the first passage exchanges heat with the refrigerant in the first header, the refrigerant in the first passage is kept separate from the refrigerant in the first header, and the first The passage includes a first opening and a second opening, the first opening of the first passage is in communication with the first opening of the compressor, the second opening of the first passage is in communication with the flow direction conversion member, and the control The piece includes a first opening and a second opening.

According to the heat exchange system of the embodiment of the present application, the first passage is provided to communicate with the first opening of the compressor and the flow direction conversion member, and the refrigerant flowing through the first passage can exchange heat with the refrigerant in the first header and remain separated, The gasification of liquid refrigerant is accelerated, the evaporation temperature is increased, the frosting speed of the heating mode is delayed, and the heat exchange performance is improved.

The heat exchange system according to the embodiment of the fifth aspect of the present application includes a compressor, a first heat exchanger, a second heat exchanger, a throttling element, a flow direction conversion element, and a gas-liquid separator. The compressor includes a first opening and A second opening, the first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, The gas-liquid separator includes a first opening and a second opening, the first opening of the first heat exchanger is in communication with the first opening of the compressor through the flow direction conversion element, and the first heat exchanger The second opening of the throttle is in communication with the first opening of the throttle, the second opening of the throttle is in communication with the first opening of the second heat exchanger, and the second opening of the second heat exchanger The flow direction conversion element communicates with the first opening of the gas-liquid separator, and the second opening of the gas-liquid separator communicates with the second opening of the compressor. When the heat exchange system is working, the The heat exchange system is filled with refrigerant, the flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system, the heat exchange system further includes a second channel, and at least part of the second channel is provided in the In the gas-liquid separator, the refrigerant in the second passage exchanges heat with the refrigerant in the gas-liquid separator, and the refrigerant in the second passage exchanges heat with the refrigerant in the gas-liquid separator When the refrigerant in the second channel is kept separate from the refrigerant in the gas-liquid separator, the second channel includes a first opening and a second opening, and the first opening of the second channel is connected to the compressor The first opening of the machine is in communication, and the second opening of the second passage is in communication with the flow direction conversion member.

According to the heat exchange system of the embodiment of the present application, the second passage is provided to connect the first opening of the compressor and the flow direction conversion element, and the refrigerant flowing through the second passage can exchange heat with the refrigerant in the gas-liquid separator, accelerating the liquid state. The refrigerant gasification increases the evaporation temperature, delays the frosting speed of the heating mode, and improves the heat exchange performance.

Description of the drawings

Fig. 1 is a schematic structural diagram of a heat exchange system according to an embodiment of the present application.

Fig. 2 is a partial enlarged schematic diagram of the heat exchange system in Fig. 1.

Fig. 3 is a schematic diagram of the heat exchange system in Fig. 1, which shows the openings of each device in the system.

Fig. 4 is a schematic structural diagram of a heat exchange system according to another embodiment of the present application.

Fig. 5 is a partial enlarged schematic diagram of the heat exchange system in Fig. 4.

Fig. 6 is a schematic structural diagram of a heat exchange system according to still another embodiment of the present application.

Fig. 7 is a schematic structural diagram of a heat exchange system according to another embodiment of the present application.

Fig. 8 is a partial enlarged schematic diagram of the heat exchange system in Fig. 7.

Fig. 9 is a schematic structural diagram of a heat exchange system according to another embodiment of the present application.

Fig. 10 is a schematic structural diagram of a second heat exchanger according to an embodiment of the present application.

Fig. 11 is a schematic diagram of the heat exchange system in Fig. 9, which shows the openings of each device in the system.

Fig. 12 is a schematic diagram of a first channel according to an embodiment of the present application.

Fig. 13 is a schematic diagram of a first channel according to another embodiment of the present application.

Fig. 14 is a schematic diagram of the first channel according to still another embodiment of the present application.

Fig. 15 is a schematic diagram of a first channel according to another embodiment of the present application.

Fig. 16 is a schematic structural diagram of a heat exchange system according to another embodiment of the present application.

Fig. 17 is a partial enlarged schematic diagram of the heat exchange system in Fig. 16.

Fig. 18 is a schematic structural diagram of a heat exchange system according to still another embodiment of the present application.

Fig. 19 is a partial enlarged schematic diagram of the heat exchange system in Fig. 18.

Detailed ways

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present application, but should not be understood as a limitation to the present application. In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply the device or element referred to. The clamp must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application.

As shown in Figs. 1-5, the heat exchange system according to the embodiment of the present application includes a compressor 1, a first heat exchanger 3, a second heat exchanger 5, a throttling element 4, and a flow direction conversion element 2. The compressor 1 includes a first opening 101 and a second opening 102. The first heat exchanger 3 includes a first opening 31 and a second opening 32. The throttle 4 includes a first opening 41 and a second opening 42. The heat exchanger 5 includes a first opening 501 and a second opening 502. The first opening 31 of the first heat exchanger 3 communicates with the first opening 101 of the compressor 1 through the flow direction conversion element 2. The second opening of the first heat exchanger 3 32 is in communication with the first opening 41 of the throttle 4, the second opening 42 of the throttle 4 is in communication with the first opening 501 of the second heat exchanger 5, and the second opening 502 of the second heat exchanger 5 is switched by the flow direction The piece 2 communicates with the second opening 102 of the compressor 1.

Specifically, adjacent devices in the heat exchange system are connected at least by pipelines. In other words, the first opening 101 of the compressor 1 and the flow direction conversion element 2 are connected by at least a first pipeline, and the flow direction conversion element 2 and the first The first openings 31 of the heat exchanger 3 are connected by at least a second pipeline, and the second openings 32 of the first heat exchanger 3 and the first opening 41 of the throttle 4 are connected by at least a third pipeline, The second opening 42 of the throttling element 4 and the first opening 501 of the second heat exchanger 5 are connected by at least a fourth pipeline, and the second opening 502 of the second heat exchanger 5 and the flow direction conversion element 2 are at least It is connected by a fifth pipeline, and the flow direction converter 2 and the second opening 102 of the compressor 1 are connected by at least a sixth pipeline.

When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the refrigerant can circulate in the heat exchange system. The flow direction changer 2 is used to change the flow direction of the refrigerant in the heat exchange system. In other words, under the action of the flow direction converter 2, the refrigerant can flow out of the compressor 1 and then pass through the first heat exchanger 3 and then flow back to the compressor 1 after passing through the second heat exchanger 5. After passing through the second heat exchanger 5 and then the first heat exchanger 3, it flows back to the compressor 1.

The heat exchange system also includes a connecting pipe 6 and a heating device 8. The connecting pipe 6 includes a first opening 61 and a second opening 62. The first opening 61 of the connecting pipe 6 is in communication with the first opening 501 of the second heat exchanger 5, and the first opening 61 of the connecting pipe 6 is connected to the throttle 4 The second opening 42 is in communication. The second opening 62 of the connecting pipe 6 communicates with the second opening 502 of the second heat exchanger 5, and the second opening 62 of the connecting pipe 6 communicates with the second opening 102 of the compressor 1 through the flow direction converter 2.

In other words, the first opening 501 and the second opening 502 of the second heat exchanger 5 are provided with connecting pipes 6 so that the first opening 501 and the second opening 502 of the second heat exchanger 5 pass through the second heat exchanger. In addition to communicating with itself, it can also be connected through the connecting pipe 6, and in addition to communicating with the flow direction conversion piece 2 through the second heat exchanger 5, the throttle piece 4 can also be connected through the connecting pipe 6.

The heating device 8 is provided in the connecting pipe 6. Specifically, in the heating mode, the heating device 8 can be turned on to heat the refrigerant in the connecting pipe 6 so as to promote the change of the refrigerant from a liquid state to a gas state.

In addition, when the heat exchange system is in use, the first opening 501 of the second heat exchanger 5 is lower than the second opening 502 of the second heat exchanger 5 in the direction of gravity, and the first opening 61 of the connecting pipe 6 is in the direction of gravity. It is lower than the second opening 62 of the connecting pipe 6.

In other words, when the first opening 501 of the second heat exchanger 5 is down and the second opening 502 is up, the refrigerant entering the second heat exchanger 5 through the first opening 501 of the second heat exchanger 5 needs to overcome its own gravity. It flows downward to flow out through the second opening 502 of the second heat exchanger 5 and flows back to the compressor 1 through the flow direction conversion element 2. The flow resistance is relatively large. In this case, the connecting pipe 6 can be used to avoid Flow resistance improves heat transfer performance.

According to the heat exchange system of the embodiment of the present application, by providing the connecting pipe 6 and the heating device 8, in the heating mode, that is, the frosting condition, the connecting pipe 6 is connected to the first opening 501 of the second heat exchanger 5 and the throttle The second opening 42 of the element 4, the second opening 502 of the second heat exchanger 5, and the flow direction conversion element 2, so that the refrigerant flowing out through the first heat exchanger 3 and the throttle element 4 can enter the flow direction conversion through the connecting pipe 6 The refrigerant in the second heat exchanger 5 flows out from the first opening 501 of the second heat exchanger 5 and flows into the flow direction conversion member 2 through the connecting pipe 6, and then flows back to the compressor 1 through the flow direction conversion member 2. Then it enters the flow direction adapter 2 through the second heat exchanger 5, the flow resistance is relatively reduced, and the heating device 8 is turned on to heat the refrigerant flowing through the connecting pipe 6, which can convert the refrigerant from liquid to gaseous refrigerant to accelerate the liquid refrigerant gas It can improve the evaporation temperature, delay the frosting speed of the heating mode, and help improve the heat exchange performance.

In addition, as the gasification of the liquid refrigerant is accelerated, the gaseous refrigerant entering the compressor 1 is increased, and the problem of compressor liquid hammer is avoided.

In some embodiments, the control member 7 is provided on the connecting pipe 6 for connecting or disconnecting the first opening 61 of the connecting pipe 6 and the second opening 62 of the connecting pipe 6. In other words, the control member 7 is opened, and the first opening 501 of the second heat exchanger 5 and the second opening of the throttle member 4 communicate with the second opening 502 of the second heat exchanger 5 and the flow direction conversion member 2 through the connecting pipe 6.

When the heat exchange system is in use, in the heating mode (frosting condition), the connecting pipe 6 connects the first opening 501 of the second heat exchanger 5, the second opening 42 of the throttling element 4, and the second heat exchanger 5 The second opening 502 of the flow direction conversion element 2, the heating device 8 is turned on to heat the refrigerant flowing through the connecting pipe 6, and the refrigerant flowing out of the compressor 1 can enter the first opening 31 of the first heat exchanger 3 through the flow direction conversion element 2 , And flow out from the second opening 32 of the first heat exchanger 3 and flow back into the compressor 1 through the throttle 4, the connecting pipe 6 and the flow direction conversion piece 2 in sequence, so that in this mode, the connecting pipe 6 is set Avoiding the problem of large flow resistance of the refrigerant in the second heat exchanger 5, heating the refrigerant flowing through the connecting pipe 6 by the heating device 8 can convert the liquid refrigerant into a gaseous refrigerant in time, accelerate the vaporization of the liquid refrigerant, and increase the evaporation temperature , Which delays the frosting speed of the heating mode, which is beneficial to improve the heat exchange performance.

When the heat exchange system is in the cooling mode, that is, the defrosting mode, the control part 7 is turned off and the heating device 8 is turned off. The refrigerant flowing out of the compressor 1 passes through the conversion part 2 and then sequentially passes through the second heat exchanger 5 and the throttling part. 4 and the first heat exchanger 3, and then flow back to the compressor 1 through the flow direction conversion element 2. In other words, in the cooling mode, the refrigerant no longer flows back to the compressor 1 through the connecting pipe 6 and the flow direction conversion element 2.

Further, in the starting phase of the heating mode (frosting condition), the control member 7 is opened to communicate the first opening 61 and the second opening 62 of the connecting pipe 6, and the heating device 8 is turned on to heat the flow through the connecting pipe 6. Refrigerant.

In the stable stage of the heating mode (frosting condition), the control element 7 is turned off, the heating device 8 is turned off, and the refrigerant flowing out of the compressor 1 can enter the first opening 31 of the first heat exchanger 3 after flowing through the conversion element 2 , And flows out from the second opening 32 of the first heat exchanger 3 and enters the first opening 501 of the second heat exchanger 5 through the throttle 4, and flows out from the second opening 502 of the second heat exchanger 5 and passes through The flow direction conversion part 2 returns to the compressor 1.

It should be noted here that the heating mode includes a startup phase and a stable phase. After the heating mode is turned on, the compressor 1 starts, and the flow rate of the refrigerant gradually increases from a very low starting point and reaches a certain normal operating speed. Speed. The section from the start of the compressor 1 until the flow rate of the refrigerant reaches the normal operating speed is the starting stage of the heating mode, and the section when the flow rate of the refrigerant is at the normal operating speed is the stable stage of the heating mode. According to the knowledge in the art, the start-up phase of the heating mode is within 5 minutes of the start of the heating mode.

In other words, in some specific embodiments, the control member 7 is only opened during the startup phase of the heating mode to communicate with the first opening 61 and the second opening 62 of the connecting pipe 6, and the heating device 8 is only opened during the startup phase of the heating mode. Turn on to heat the refrigerant flowing through the connecting pipe 6, thereby delaying the frosting speed in the starting phase of the heating mode.

In some embodiments, the first opening 31 of the first heat exchanger 3 communicates with the second opening 102 of the compressor 1 through the flow direction conversion element 2, and the second opening 502 of the second heat exchanger 5 communicates with the second opening 102 of the compressor 1 through the flow direction conversion element 2 The first opening of the compressor 1 communicates. While the first opening 31 of the first heat exchanger 3 is in communication with the first opening 101 of the compressor 1, the second opening 502 of the second heat exchanger 5 is in communication with the second opening 102 of the compressor 1, and the first heat exchange While the first opening 31 of the compressor 3 is in communication with the second opening 102 of the compressor 1, the second opening 502 of the second heat exchanger 5 is in communication with the first opening 101 of the compressor 1.

In other words, the first opening 31 of the first heat exchanger 3 can be communicated with the first opening 101 of the compressor 1 through the flow direction converter 2, or can be communicated with the second opening 102 of the compressor 1, but with the compressor 1 The first opening 101 and the second opening 102 are not connected at the same time. The second opening 502 of the second heat exchanger 5 can be communicated with the second opening 102 of the compressor 1 through the flow direction conversion member 2, or can be communicated with the first opening of the compressor 1, but with the first opening of the compressor 1 101 and the second opening 102 are not connected at the same time. Moreover, when the first opening 31 of the first heat exchanger 3 communicates with the first opening 101 of the compressor 1, the second opening 502 of the second heat exchanger 5 needs to communicate with the second opening 102 of the compressor 1. When the first opening 31 of the first heat exchanger 3 communicates with the second opening 102 of the compressor 1, the second opening 502 of the second heat exchanger 5 needs to communicate with the first opening 101 of the compressor 1.

In some specific embodiments, the flow direction switching element 2 includes a first opening 21, a second opening 22, a third opening 23, and a fourth opening 24. For example, the flow direction switching element 2 is a four-way valve, and the flow direction switching element 2 is a first While the opening 21 is in communication with the second opening 22, the third opening 23 and the fourth opening 24 of the flow direction conversion element 2 are in communication. While the first opening 21 and the third opening 23 of the flow direction switching element 2 are in communication, the second opening 22 and the fourth opening 24 of the flow direction switching element 2 are in communication. When the first opening 21 and the second opening 22 of the flow direction switching element 2 are in communication, the first opening 21 and the third opening 23 of the flow direction switching element 2 are not connected.

In other words, the first opening 21 of the flow direction conversion member 2 may be in communication with the second opening 22, or may be in communication with the third opening 23, but not in communication with the second opening 22 and the third opening 23 at the same time. The fourth opening 24 of the flow direction conversion member 2 may be in communication with the second opening 22 or with the third opening 23, but is not in communication with the second opening 22 and the third opening at the same time. Moreover, when the first opening 21 and the second opening 22 of the flow direction switching element 2 are in communication, the third opening 23 and the fourth opening 24 of the flow direction switching element 2 are in communication. When the first opening 21 and the third opening 23 of the flow direction switching element 2 are in communication, the second opening 22 of the flow direction switching element 2 is in communication with the fourth opening 24.

The first opening 21 of the flow direction conversion element 2 is communicated with the first opening 101 of the compressor 1, and the second opening 22 of the flow direction conversion element 2 is communicated with the first opening 31 of the first heat exchanger 3, and flows to the first opening 31 of the conversion element 2. The three openings 23 are in communication with the second opening 502 of the second heat exchanger 5, and the fourth opening 24 of the flow to the conversion element 2 is in communication with the second opening 102 of the compressor 1, so that the flow to the first opening 21 of the conversion element 2 and When the second opening 22 is in communication and the third opening 23 and the fourth opening 24 of the flow direction converter 2 are in communication, the flow direction converter 2 communicates with the first opening 101 of the compressor 1 and the first opening 31 of the first heat exchanger 3, and The second opening 102 of the compressor 1 and the second opening 502 of the second heat exchanger 5 are connected. When the first opening 22 and the third opening 23 of the flow direction conversion member 2 are in communication and the second opening 22 and the fourth opening 24 of the flow direction conversion member 2 are in communication, the flow direction conversion member 2 communicates with the first opening 101 and the second opening 101 of the compressor 1 The second opening 502 of the heat exchanger 5 communicates with the second opening 102 of the compressor 1 and the first opening 31 of the first heat exchanger 3.

When the heat exchange system is in the heating mode, the first opening 21 and the second opening 22 flowing to the conversion element 2 are connected, and the third opening 23 and the fourth opening 24 flowing to the conversion element 2 are connected, thereby communicating with the first opening 101 of the compressor 1 And the first opening 31 of the first heat exchanger 3 and communicate with the second opening 102 of the compressor 1 and the second opening 502 of the second heat exchanger 5 so that the refrigerant flowing out of the first opening 101 of the compressor 1 can pass The flow direction conversion element 2 enters the first heat exchanger 3, and the refrigerant in the second heat exchanger 5 can be returned to the compressor 1 through the second opening 102 of the compressor 1.

In the starting phase of the heating mode, the control member 7 is opened to communicate the first opening 61 and the second opening 62 of the connecting pipe 6, and the heating device 8 is turned on to heat the refrigerant in the connecting pipe 6.

In the stable phase of the heating mode, the control element 7 is turned off and the heating device 8 is turned off.

In the cooling mode, the control element 7 is closed and the heating device 8 is closed, the first opening 21 and the third opening 23 of the flow to the conversion element 2 are communicated, and the second opening 22 and the fourth opening 24 of the flow to the conversion element 2 are communicated, thereby communicating with the compressor The first opening 101 of 1 and the second opening 502 of the second heat exchanger 5 communicate with the second opening 102 of the compressor 1 and the first opening 31 of the first heat exchanger 3, so that the first opening of the compressor 1 The refrigerant flowing out of the opening 101 enters the second heat exchanger 5 through the flow direction converter 2, and the refrigerant in the first heat exchanger 3 can be returned to the compressor 1 through the second opening 102 of the compressor 1.

In some embodiments, the heating device 8 is an electric heating wire, and the electric heating wire is provided in the connecting pipe 6. In other words, during the start-up phase of the cooling mode, the heating wire provided in the connecting pipe 6 heats the refrigerant flowing in the connecting pipe 6 to convert the liquid refrigerant into a gaseous refrigerant. It can be understood that the heating device 8 of the present application is not limited to this. For example, the electric heating device 8 may also be an electric heating tube, and the electric heating tube is provided in the connecting tube 6. For another example, the electric heating device 8 may also be an electric heating belt, which is wound around the outer wall of the connecting pipe 6.

In some embodiments, the second heat exchanger 5 includes a first header 51, a second header 52 and a plurality of first heat exchange tubes 53. The first header 51 and the second header 52 are arranged at intervals, the first header 51 is adjacent to and communicated with the first opening 501 of the second heat exchanger 5, and the second header 52 is connected to the second heat exchanger. The second opening 502 of 5 is adjacent and connected. As shown in FIGS. 1-5, the first header 51 and the second header 52 are arranged substantially in parallel and spaced apart in the vertical direction, and the first header 51 is located below the second header 52. The right end of the first header 51 is adjacent to the first opening 501 of the second heat exchanger 5 and communicates with the first opening 501 of the second heat exchanger 5, and the right end of the second header 52 is adjacent to the second heat exchanger 5 The second opening 502 of the second heat exchanger 5 is in communication with the second opening 502 of the second heat exchanger 5.

A plurality of first heat exchange tubes 53 are arranged at intervals along the length direction of the first header 51, and at least one first heat exchange tube 53 is connected to the first header 51 at one end of its length direction. The other end of the heat exchange tube 53 in its length direction is connected to the second header 52 to communicate the first header 51 and the second header 52. As shown in Figures 1-5, the length of the first heat exchange tube 53 is up and down, the upper end of the first heat exchange tube 53 is connected to the first header 51, and the lower end of the first heat exchange tube 53 is connected to the second header. The flow tube 52 is connected, so that the first header 51 and the second header 52 are in communication through the first heat exchange tube 53.

Specifically, the second heat exchanger 5 further includes fins 54 which are arranged between adjacent first heat exchange tubes 53. By arranging the fin 54 between the adjacent first heat exchange tubes 53, the heat exchange area of the two adjacent first heat exchange tubes 53 can be increased, and the heat exchange efficiency can be improved.

In some specific embodiments, the second heat exchanger 5 further includes a first tube 55 and a second tube 56. The first tube 55 is in communication with the first header 51, and one end of the first tube 55 is located outside the first header 51, and the first opening 501 of the second heat exchanger 5 is provided in the first tube 55. One end. As shown in FIGS. 1-5, the upper right end of the first tube 55 is located outside the first header 51, and the upper right end of the first tube 55 is provided with an opening to form the first opening 501 of the second heat exchanger 5 .

The second tube 56 communicates with the second header 52, and one end of the second tube 56 is located outside the second header 52, and the second opening 502 of the second heat exchanger 5 is provided in the second tube 56 One end. As shown in FIGS. 1-5, the lower right end of the second tube 56 is located outside the second header 52, and the lower right end of the second tube 56 is provided with an opening to form the second opening 502 of the second heat exchanger 5. .

In some embodiments, the first opening 61 of the connecting pipe 6 is provided at one end of the connecting pipe 6, the one end of the connecting pipe 6 is connected to one end of the first pipe 55, or the one end of the connecting pipe 6 The end is connected to the first header 51 to communicate the connecting tube 6 and the first header 51.

The second opening 62 of the connecting pipe 6 is provided at the other end of the connecting pipe 6, and the other end of the connecting pipe 6 is connected to the other end of the second pipe 56.

As shown in Figures 1-5, the first opening 61 of the connecting pipe 6 is provided at the lower end of the connecting pipe 6, the second opening 62 of the connecting pipe 6 is provided at the upper end of the connecting pipe 6, and the upper end of the connecting pipe 6 is The lower right end of the two pipes 56 are connected.

For the lower end of the connecting pipe 6, in the embodiment shown in FIGS. 1-3, the lower end of the connecting pipe 6 is connected to the upper right end of the first pipe 55. In the embodiment shown in Figures 4 and 5, the lower end of the connecting pipe 6 is connected to the first header 51 to communicate the connecting pipe 6 and the first header 51. It can be understood that in this embodiment The first opening 501 of the second heat exchanger 5 communicates with the first opening 61 of the connecting pipe 6 through the inner cavity of the first header 51.

In some specific embodiments, the other end of the first tube 55 and a section adjacent to the other end are located in the first header 51, and a section of the first tube 55 is provided with a connection between the first tube 55 and The through hole of the first header 51. As shown in Figures 1-5, the left part of the first tube 55 extends into the first header 51, and the left part of the first tube 55 is provided with a through hole to connect the first tube 55 and the first header. Tube 51. The refrigerant can enter the first header 51 through the first tube 55 and the through holes on the first tube 55.

Further, in the embodiment shown in FIGS. 4 and 5, the refrigerant flowing out of the second opening 42 of the throttle member 4 can pass through the upper right end of the first pipe 55 during the start-up phase of the heating mode of the heat exchange system. The opening of the first tube 55 enters the first tube 55, and enters the first header 51 through the through hole on the first tube 55. The refrigerant in the first header 51 can enter the flow direction converter 2 through the connecting tube 6 and be converted by the flow direction Piece 2 is refluxed to compressor 1.

In some specific embodiments, the first header 51 includes two ends spaced apart in its length direction, and the connection between the connecting pipe 6 and the first header 51 is far from the two ends of the first header 51. One end. As shown in Figures 4 and 5, the length direction of the first header 51 is the left and right direction. The first header 51 includes a left end and a right end. The connection between the connecting pipe 6 and the first header 51 is located at the first There is a certain distance between the left end and the right end of a header 51 and the left end of the first header 51 and a certain distance from the right end of the first header 51.

In some embodiments, the first heat exchange tube 53 is a flat tube, and the first heat exchange tube 53 includes a first side surface and a second side surface disposed oppositely, and a third side surface and a fourth side surface disposed oppositely. The distance between the first side surface and the second side surface of 53 is smaller than the distance between the third side surface and the fourth side surface of the first heat exchange tube 53. In other words, the first heat exchange tube 53 has a thickness and a width, and the width of the first heat exchange tube 53 is greater than the thickness of the first heat exchange tube 53.

The first heat exchange tube 53 also includes a plurality of passages arranged at intervals, and the first heat exchange tube 53 communicates with the first header 51 and the second header 52 through the passages.

Specifically, each first heat exchange tube 53 of the plurality of first heat exchange tubes 53 communicates with the first header 51 and the second header 52. In other words, the plurality of first heat exchange tubes 53 are all connected to the first header 51 and the second header 52. The header 51 and the second header 52 are in communication. The relationship between the connecting tube 6 and the first heat exchange tube 53 of the second heat exchanger 5 is:

A≥0.5·n·C, where A is the flow area of the connecting pipe 6, C is the flow area of a single first heat exchange tube 53, and n is the number of first heat exchange tubes 53 in the heat exchanger.

In some embodiments, as shown in FIGS. 1-3, the heat exchange system further includes a gas-liquid separator 9. The gas-liquid separator 9 includes a first opening and a second opening, and the first opening 91 of the gas-liquid separator 9 and The flow direction converter 2 is in communication, and the second opening 92 of the gas-liquid separator 9 is in communication with the second opening 102 of the compressor 1. In other words, the flow direction switching element 2 communicates with the second opening 102 of the compressor 1 through the gas-liquid separator 9.

Specifically, the fourth opening 24 of the flow direction switching element 2 is in communication with the first opening 91 of the gas-liquid separator 9. By providing a gas-liquid separator 9 between the flow direction converter 2 and the second opening 102 of the compressor 1, in the heating mode, the liquid refrigerant and the gaseous refrigerant can be separated and the liquid refrigerant can be stored in the gas-liquid separator 9 , And the gaseous refrigerant returns to the compressor 1, that is, to prevent the liquid refrigerant from returning to the compressor 1, thereby reducing the risk of the compressor 1 liquid shock.

It can be understood that the present application is not limited to the embodiments shown in FIGS. 1-5. Hereinafter, a heat exchange system according to another embodiment of the present application will be described with reference to FIG. 6.

As shown in Figure 6 and with reference to the labeling of the opening in Figure 3, the heat exchange system according to the embodiment of the present application includes a compressor 1, a first heat exchanger 3, a second heat exchanger 5, a throttle 4 and a flow direction conversion Part 2. The compressor 1 includes a first opening 101 and a second opening 102. The first heat exchanger 3 includes a first opening 31 and a second opening 32. The throttle member 4 includes a first opening 41 and a second opening 42. The second heat exchanger 5 includes a first opening 501 and a second opening 502. The first opening 31 of the first heat exchanger 3 communicates with the first opening 101 of the compressor 1 through the flow direction conversion element 2. The second opening 32 is in communication with the first opening 41 of the throttle 4, the second opening 42 of the throttle 4 is in communication with the first opening 501 of the second heat exchanger 5, and the second opening 502 of the second heat exchanger 5 It communicates with the second opening 102 of the compressor 1 through the flow direction switching member 2.

Specifically, adjacent devices in the heat exchange system are connected at least by pipelines. In other words, the first opening 101 of the compressor 1 and the flow direction conversion element 2 are connected by at least a first pipeline, and the flow direction conversion element 2 and the first The first openings 31 of the heat exchanger 3 are connected by at least a second pipeline, and the second openings 32 of the first heat exchanger 3 and the first opening 41 of the throttle 4 are connected by at least a third pipeline, The second opening of the throttling element 4 and the first opening 501 of the second heat exchanger 5 are connected by at least a fourth pipe, and the second opening 502 of the second heat exchanger 5 and the flow direction conversion element 2 pass through at least The fifth pipeline is connected, and the flow direction conversion element 2 and the second opening 102 of the compressor 1 are connected by at least a sixth pipeline.

The heat exchange system further includes a heating device 8 which is arranged between the second opening 502 of the second heat exchanger 5 and the second opening 102 of the compressor 1. In other words, at any position between the second opening 502 of the second heat exchanger 5 and the second opening 102 of the compressor 1 in the heat exchange system, that is, any pipeline and/or device between the two is provided with a heating device 8.

When the heat exchange system is in use, in the heating mode (frosting condition), the refrigerant flowing out of the compressor 1 can enter the first heat exchanger 3 through the flow direction conversion element 2 and the first opening 31 of the first heat exchanger 3 , And flows out from the second opening 32 of the first heat exchanger 3, enters the second heat exchanger 5 through the throttling member 4 and the first opening 501 of the second heat exchanger 5, and enters the second heat exchanger 5 from the first opening 501 of the second heat exchanger 5 The two openings 502 flow out, and return to the compressor 1 through the flow direction switching element 2.

In the refrigeration mode (defrosting mode), the refrigerant flowing out of the compressor 1 can enter the second heat exchanger 5 through the second opening 502 flowing to the conversion element 2 and the second heat exchanger 5, and from the second heat exchanger After the first opening 501 of 5 flows out, it enters the first heat exchanger 3 through the throttle 4 and the second opening 32 of the first heat exchanger 3 and flows out from the first opening 31 of the first heat exchanger 3, and passes through the flow direction The conversion part 2 returns to the compressor 1.

Specifically, in the heating mode (frosting condition), the heating device 8 is turned on to heat the refrigerant flowing anywhere between the second opening 52 of the second heat exchanger 5 and the second opening 102 of the compressor 1. In the cooling mode (defrosting mode), the heating device 8 is turned off.

According to the heat exchange system of the embodiment of the present application, by setting the heating device 8, the heating device 8 can be turned on in the heating mode to heat the second opening 52 of the second heat exchanger 5 and the second opening 102 of the compressor 1 The refrigerant at any position in between can accelerate the vaporization of the liquid refrigerant, increase the evaporation temperature, delay the frosting speed of the heating mode, and improve the heat exchange performance.

Moreover, as the liquid refrigerant is vaporized, the amount of gaseous refrigerant entering the compressor 1 is increased, thereby reducing the risk of compressor liquid shock.

In some specific embodiments, during the startup phase of the heating mode (frosting condition), the heating device 8 is activated to heat the second opening 502 of the second heat exchanger 5 and the second opening 102 of the compressor 1 Refrigerant anywhere in between.

In the stable phase of the heating mode (frosting condition), the heating device 8 is turned off.

In other words, in some specific embodiments, the heating device 8 is only turned on during the startup phase of the heating mode to heat any position between the second opening 52 of the second heat exchanger 5 and the second opening 102 of the compressor 1 Of the refrigerant, thereby delaying the frosting speed during the start-up phase of the heating mode.

In some embodiments, the first opening 31 of the first heat exchanger 3 communicates with the second opening 102 of the compressor 1 through the flow direction conversion element 2, and the second opening 502 of the second heat exchanger 5 communicates with the second opening 102 of the compressor 1 through the flow direction conversion element 2. The first opening of the compressor 1 communicates. While the first opening 31 of the first heat exchanger 3 is in communication with the first opening 101 of the compressor 1, the second opening 502 of the second heat exchanger 5 is in communication with the second opening 102 of the compressor 1, and the first heat exchange While the first opening 31 of the compressor 3 is in communication with the second opening 102 of the compressor 1, the second opening 502 of the second heat exchanger 5 is in communication with the first opening 101 of the compressor 1.

In some embodiments, the flow direction switching element 2 includes a first opening 21, a second opening 22, a third opening 23, and a fourth opening 24. For example, the flow direction switching element 2 is a four-way valve, and the flow direction switching element 2 is a first opening 21 While communicating with the second opening 22, the third opening 23 and the fourth opening 24 of the flow direction switching member 2 are communicated with each other. While the first opening 21 and the third opening 23 of the flow direction switching element 2 are in communication, the second opening 22 and the fourth opening 24 of the flow direction switching element 2 are in communication. When the first opening 21 and the second opening 22 of the flow direction conversion element 2 are in communication, the first opening 21 and the third opening 23 of the flow direction conversion element 2 are not connected.

In other words, the first opening 21 of the flow direction conversion member 2 may be in communication with the second opening 22, or in communication with the third opening 23, but not in communication with the second opening 22 and the third opening 23 at the same time. The fourth opening 24 of the flow direction conversion member 2 may be in communication with the second opening 22 or with the third opening 23, but is not in communication with the second opening 22 and the third opening at the same time. Moreover, when the first opening 21 and the second opening 22 of the flow direction switching element 2 are in communication, the third opening 23 and the fourth opening 24 of the flow direction switching element 2 are in communication. When the first opening 21 and the third opening 23 of the flow direction switching element 2 are in communication, the second opening 22 of the flow direction switching element 2 is in communication with the fourth opening 24.

When the heat exchange system is in the heating mode, the first opening 21 and the second opening 22 flowing to the conversion element 2 are communicated, and the third opening 23 and the fourth opening 24 flowing to the conversion element 2 are communicated, thereby communicating with the first opening 101 of the compressor 1 And the first opening 31 of the first heat exchanger 3, and communicate with the second opening 102 of the compressor 1 and the second opening 502 of the second heat exchanger 5, so that the refrigerant flowing out of the first opening 101 of the compressor 1 It enters the first heat exchanger 3 through the flow direction conversion element 2, and the refrigerant in the second heat exchanger 5 can flow back to the compressor 1 through the second opening 102 of the compressor 1.

Among them, during the startup phase of the heating mode, the heating device 8 is turned on to heat the refrigerant at any position between the second opening 502 of the second heat exchanger 5 and the second opening 102 of the compressor 1.

In the stable phase of the heating mode and the cooling mode, the heating device 8 is turned off.

In some embodiments, the heat exchange system further includes a gas-liquid separator 9. The gas-liquid separator 9 includes a first opening and a second opening. The first opening 91 of the gas-liquid separator 9 is in communication with the flow direction conversion element 2. The second opening 92 of the separator 9 communicates with the second opening 102 of the compressor 1. In other words, the flow direction switching element 2 communicates with the second opening 102 of the compressor 1 through the gas-liquid separator 9. Specifically, the fourth opening 24 of the flow direction switching element 2 is in communication with the first opening 91 of the gas-liquid separator 9. By providing a gas-liquid separator 9 between the flow direction converter 2 and the second opening 102 of the compressor 1, in the heating mode, the liquid refrigerant and the gaseous refrigerant can be separated and the liquid refrigerant can be stored in the gas-liquid separator 9 , And the gaseous refrigerant returns to the compressor 1, that is, to prevent the liquid refrigerant from returning to the compressor 1, thereby reducing the risk of compressor 1 liquid shock.

As shown in Figure 6, the heating device 8 is installed in the gas-liquid separator 9, so that in the heating mode, the heating device 8 can be turned on to heat the liquid refrigerant in the gas-liquid separator 9 into a gaseous refrigerant, further accelerating the refrigerant flow rate and increasing evaporation Temperature slows down the frosting speed of heating mode.

In some embodiments, the heating device 8 is an electric heating wire, and the electric heating wire is provided in the gas-liquid separator 9. In other words, in the cooling mode, the refrigerant flowing in the gas-liquid separator 9 is heated by the heating wire provided in the gas-liquid separator 9 to convert the liquid refrigerant into the gaseous refrigerant. It can be understood that the heating device 8 of the present application is not limited to this. For example, the electric heating device 8 may also be an electric heating tube, and the electric heating tube is provided in the gas-liquid separator 9. For another example, the electric heating device 8 may also be an electric heating belt, which is arranged around the outer wall of the gas-liquid separator 9.

It can be understood that the present application is not limited to the embodiments shown in FIGS. 1-5 and 6 above. Hereinafter, a heat exchange system according to another embodiment of the present application will be described with reference to FIG. 7 and FIG. 8.

As shown in Figures 7 and 8, and with reference to the labeling of the opening in Figure 3, the heat exchange system according to the embodiment of the present application includes a compressor 1, a first heat exchanger 3, a second heat exchanger 5, and a throttle 4和流向转件2。 And flow to the conversion piece 2. The compressor 1 includes a first opening 101 and a second opening 102. The first heat exchanger 3 includes a first opening 31 and a second opening 32. The throttle member 4 includes a first opening 41 and a second opening 42. The first opening 31 of the heat exchanger 3 communicates with the first opening 101 of the compressor 1 through the flow direction converter 2, and the second opening 32 of the first heat exchanger 3 communicates with the first opening 41 of the throttle 4.

The second heat exchanger 5 includes a first header 51, a second header 52, and a plurality of first heat exchange tubes 53, the first header 51 and the second header 52 are arranged at intervals, and the first header The tube 51 communicates with the second opening 42 of the throttle 4, and the second header 52 communicates with the second opening 102 of the compressor 1 through the flow direction conversion member 2. As shown in FIGS. 7 and 8, the first header 51 and the second header 52 are arranged substantially in parallel and spaced apart in the vertical direction, and the first header 51 is located below the second header 52. The right end of the first header 51 is connected with the throttling piece 4 to communicate with the first header 51 and the second opening 42 of the throttling piece 4, and the right end of the second header 52 is connected with the flow direction conversion piece 2 It communicates with the second opening 102 of the compressor 1 through the flow direction switching member 2.

Specifically, adjacent devices in the heat exchange system are connected at least by pipelines. In other words, the first opening 101 of the compressor 1 and the flow direction conversion element 2 are connected by at least a first pipeline, and the flow direction conversion element 2 and the first The first openings 31 of the heat exchanger 3 are connected by at least a second pipeline, and the second openings 32 of the first heat exchanger 3 and the first opening 41 of the throttle 4 are connected by at least a third pipeline, The second opening of the throttling element 4 and the first header 51 are connected by at least a fourth pipeline, and the second header 52 and the flow direction switching element 2 are connected by at least a fifth pipeline, and the flow direction switching element 2 is connected by at least a fifth pipeline. It is connected to the second opening 102 of the compressor 1 by at least a sixth pipeline.

The heat exchange system further includes a heating device 8, and the heating device 8 is arranged in the first header 51.

When the heat exchange system is in use, in the heating mode (frosting condition), the refrigerant flowing out of the compressor 1 can enter the first heat exchanger 3 through the flow direction conversion element 2 and the first opening 31 of the first heat exchanger 3 , And flows out from the second opening 32 of the first heat exchanger 3, enters the second heat exchanger 5 through the throttling element 4 and the first header 51, flows out from the second header 52, and passes through the flow direction converter 2 Reflux into the compressor 1.

In the refrigeration mode (defrosting mode), the refrigerant flowing out of the compressor 1 can enter the second heat exchanger 5 through the flow direction converter 2 and the second header 52, and flow out of the first header 51 and then pass through the junction. The flow element 4 and the second opening 32 of the first heat exchanger 3 enter the first heat exchanger 3 and flow out from the first opening 31 of the first heat exchanger 3, and return to the compressor 1 through the flow direction conversion element 2.

Specifically, in the heating mode (frosting condition), the heating device 8 is turned on to heat the refrigerant flowing through the first header 51. In the cooling mode (defrosting mode), the heating device 8 is turned off.

In addition, when the heat exchange system is in use, the first header 51 is lower than the second header 52 in the direction of gravity. In other words, when the first header 51 is down and the second header 52 is up, the refrigerant entering the second heat exchanger 5 through the first header 51 needs to overcome its own gravity to flow down to pass through the second heat exchanger. The header 52 flows out and flows back to the compressor 1 through the flow direction conversion member 2, and the flow resistance is relatively large. In this case, the heating device 8 can be set to convert the liquid refrigerant into the gaseous refrigerant to increase the flow rate of the refrigerant and reduce the flow. Resistance slows down the frosting speed of the heating mode and improves the heat transfer performance.

According to the heat exchange system of the embodiment of the present application, by setting the heating device, the heating device 8 can be turned on in the heating mode to heat the refrigerant flowing through the first header 51, which can convert the refrigerant from liquid to gaseous refrigerant, accelerating The gasification of liquid refrigerant increases the evaporation temperature, delays the frosting speed of the heating mode, and improves the heat exchange performance.

In some specific embodiments, during the startup phase of the heating mode (frosting condition), the heating device 8 provided in the first header 51 is started to heat the refrigerant flowing through the first header 51 .

It should be noted here that the heating mode includes a start-up phase and a stable phase. After the heating mode is turned on, the compressor 1 starts, and the flow rate of the refrigerant gradually increases from a very low starting point and reaches a certain normal operating speed. Speed. The section from the start of the compressor 1 until the flow rate of the refrigerant reaches the normal operating speed is the starting stage of the heating mode, and the section when the flow rate of the refrigerant is at the normal operating speed is the stable stage of the heating mode. According to the knowledge in the art, the start-up phase of the heating mode is within 5 minutes of the start of the heating mode.

In other words, in some specific embodiments, the heating device 8 is only turned on during the start-up phase of the heating mode to heat the refrigerant flowing through the first header 51, thereby delaying the frosting speed during the start-up phase of the heating mode.

The first opening 21 of the flow direction conversion element 2 is communicated with the first opening 101 of the compressor 1, and the second opening 22 of the flow direction conversion element 2 is communicated with the first opening 31 of the first heat exchanger 3, and flows to the first opening 31 of the conversion element 2. The three openings 23 are in communication with the second header 52, and the fourth opening 24 of the flow direction conversion member 2 is in communication with the second opening 102 of the compressor 1, so that the first opening 21 and the second opening 22 of the flow direction conversion member 2 are in communication with each other. And when the third opening 23 and the fourth opening 24 of the flow direction converter 2 are in communication, the flow direction converter 2 communicates with the first opening 101 of the compressor 1 and the first opening 31 of the first heat exchanger 3, and communicates with the compressor 1 The second opening 102 and the second header 52. When the first opening 22 and the third opening 23 of the flow direction switching element 2 are in communication and the second opening 22 and the fourth opening 24 of the flow direction switching element 2 are in communication, the flow direction switching element 2 communicates with the first opening 101 and the second opening 101 of the compressor 1 The header 52 communicates with the second opening 102 of the compressor 1 and the first opening 31 of the first heat exchanger 3.

When the heat exchange system is in the heating mode, the first opening 21 and the second opening 22 of the flow to the conversion element 2 are communicated, and the third opening 23 and the fourth opening 24 of the flow to the conversion element 2 are communicated, so as to communicate with the first opening of the compressor 1 101 and the first opening 31 of the first heat exchanger 3, and communicate with the second opening 102 of the compressor 1 and the second header 52, so that the refrigerant flowing out of the first opening 101 of the compressor 1 passes through the flow direction converter 2 enters the first heat exchanger 3, and the refrigerant in the second heat exchanger 5 can flow back to the compressor 1 through the second opening 102 of the compressor 1.

Among them, during the startup phase of the heating mode, the heating device 8 is turned on to heat the refrigerant in the first header 51.

In some specific embodiments, the heating device 8 is an electric heating tube or an electric heating wire.

In some embodiments, the heat exchange system further includes a gas-liquid separator 9. The gas-liquid separator 9 includes a first opening and a second opening. The first opening 91 of the gas-liquid separator 9 is in communication with the flow direction conversion element 2. The second opening 92 of the separator 9 communicates with the second opening 102 of the compressor 1. . In other words, the flow direction switching element 2 communicates with the second opening 102 of the compressor 1 through the gas-liquid separator 9. Specifically, the fourth opening 24 of the flow direction switching element 2 is in communication with the first opening 91 of the gas-liquid separator 9. By providing a gas-liquid separator 9 between the flow direction converter 2 and the second opening 102 of the compressor 1, in the heating mode, the liquid refrigerant and the gaseous refrigerant can be separated and the liquid refrigerant can be stored in the gas-liquid separator 9 , And the gaseous refrigerant flows back into the compressor 1 to further prevent the liquid refrigerant from flowing back into the compressor 1, thereby reducing the risk of compressor 1 liquid shock.

As shown in FIGS. 9-17, the heat exchange system according to the embodiment of the present invention includes a compressor 1, a first heat exchanger 3, a second heat exchanger 5, a throttling element 4, and a flow direction conversion element 2. The compressor 1 includes a first opening 101 and a second opening 102. The first heat exchanger 3 includes a first opening 31 and a second opening 32. The throttle member 4 includes a first opening 41 and a second opening 42. The first opening 31 of the heat exchanger 3 communicates with the first opening 101 of the compressor 1 through the flow direction converter 2, and the second opening 32 of the first heat exchanger 3 communicates with the first opening 41 of the throttle 4.

The second heat exchanger 5 includes a first header 51, a second header 52, and a plurality of first heat exchange tubes 53, the first header 51 and the second header 52 are arranged at intervals. As shown in FIGS. 9 and 10, the first header 51 and the second header 52 are arranged substantially in parallel and spaced apart in the vertical direction, and the first header 51 is located below the second header 52.

A plurality of first heat exchange tubes 53 are arranged at intervals along the length direction of the first header 51, and at least one first heat exchange tube 53 is connected to the first header 51 at one end of its length direction. The other end of the heat exchange tube 53 in its length direction is connected to the second header 52 to communicate the first header 51 and the second header 52. As shown in Figures 9 and 10, the length direction of the first heat exchange tube 53 is up and down, the upper end of the first heat exchange tube 53 is connected to the first header 51, and the lower end of the first heat exchange tube 53 is connected to the second The headers 52 are connected, so that the first header 51 and the second header 52 are in communication through the first heat exchange tube 53.

The first header 51 is in communication with the second opening 42 of the throttling member 4, and the second header 52 is in communication with the second opening 102 of the compressor 1 through the flow direction conversion member 2. Specifically, adjacent devices in the heat exchange system are connected at least by pipelines. In other words, the first opening 101 of the compressor 1 and the flow direction conversion element 2 are connected by at least a first pipeline, and the flow direction conversion element 2 and the first The first openings 31 of the heat exchanger 3 are connected by at least a second pipeline, and the second openings 32 of the first heat exchanger 3 and the first opening 41 of the throttle 4 are connected by at least a third pipeline, The second opening 42 of the throttle 4 and the first header 51 are connected by at least a fourth pipeline, and the second header 52 and the flow direction conversion element 2 are connected by at least a fifth pipeline. 2 and the second opening 102 of the compressor 1 are connected by at least a sixth pipeline.

The heat exchange system also includes a first channel 100. At least part of the first passage 100 is provided in the first header 51 so that the refrigerant in the first passage 100 exchanges heat with the refrigerant in the first header 51, and the refrigerant in the first passage 100 exchanges heat with the first header. When the refrigerant in the header 51 exchanges heat, the refrigerant in the first passage 100 and the refrigerant in the first header 51 are kept separate. The first passage 100 includes a first opening 110 and a second opening 111. The first opening 110 of the first passage 100 is in communication with the first opening 101 of the compressor 1, and the second opening 111 of the first passage 100 is in communication with the flow direction conversion member 2 .

In other words, a pipeline, such as a seventh pipeline, is added between the first opening 101 of the compressor 1 and the flow direction conversion element 2, and the seventh pipeline flows through the first header 51, and one of the seventh pipelines The end opening is in communication with the first opening 101 of the compressor 1, and the other end opening of the seventh pipeline is in communication with the flow direction switching element 2, wherein the seventh pipeline is located in the part of the first header 51. The refrigerant can exchange heat with the refrigerant in the first header 51. Specifically, one end of the seventh pipeline is connected to the first pipeline between the compressor 1 and the flow direction converter 2, the other end of the seventh pipeline is connected to the first pipeline, and the seventh pipeline is connected to the first pipeline. One end of the pipeline and the other end of the seventh pipeline are spaced apart on the first pipeline.

In addition, when the heat exchange system is in use, the first header 51 is lower than the second header 52 in the direction of gravity. In other words, when the first header 51 is down and the second header 52 is up, the refrigerant entering the second heat exchanger 5 through the first header 51 needs to overcome its own gravity to flow down to pass through the second heat exchanger. The header 52 flows out and flows back to the compressor 1 through the flow direction conversion member 2, and the flow resistance is relatively large. In this case, the first passage 100 is provided to exchange the gaseous refrigerant from the compressor 1 with the second The liquid refrigerant in the heat exchanger 5 exchanges heat, reduces the flow resistance and improves the heat exchange performance.

According to the heat exchange system of the embodiment of the present invention, by providing the first passage 100 to communicate with the first opening 101 of the compressor 1 and the flow direction converter 2, the refrigerant flowing through the first passage 100 can be connected with the refrigerant in the first header 51 The refrigerant exchanges heat, and the refrigerant in the first channel 100 can be kept separated from the refrigerant in the first header 51 during heat exchange, which accelerates the vaporization of the liquid refrigerant, increases the evaporation temperature, and delays the frosting speed of the heating mode. Improved heat transfer performance.

In addition, as the gasification of the liquid refrigerant is accelerated, the amount of gaseous refrigerant entering the compressor 1 is increased, and the risk of compressor liquid shock is reduced.

In some embodiments, the heat exchange system further includes a control element 16. The control element 16 includes a first opening 161 and a second opening 162, the first opening 161 of the control element 16 and the first opening 101 and the first passage of the compressor 1 100 communicates with the first opening 110, the second opening 162 of the control member 16 communicates with the second opening 111 of the first passage 100 and the flow direction conversion member 2, and the control member 16 can be opened to communicate with the first opening 161 of the control member 16 and the first opening 161 of the control member 16. The two openings 162 in turn communicate with the first opening 101 of the compressor 1 and the flow direction switching member 2, and the control member 16 can be closed to disconnect the first opening 161 and the second opening 162 of the control member 16 to disconnect the first opening of the compressor 1 101 and flow direction conversion piece 2.

In other words, a section of the first connecting pipeline between one end of the seventh pipeline and the other end of the seventh pipeline is provided with a control member 16, and the control member 16 can be opened to enable the above-mentioned first connecting pipeline One section is turned on, the first opening 101 of the compressor 1 communicates with the flow direction switching member 2 through the control member 16. When the control member 16 is closed, the above section of the first connecting pipeline can be disconnected, and the first opening 101 of the compressor 1 passes The first channel 100 communicates with the flow direction conversion member 2.

When the heat exchange system is in use, in the heating mode (frosting condition), the control member 16 is closed to disconnect the above-mentioned section of the first connecting pipeline, and the refrigerant flowing out of the compressor 1 can enter the first passage through the first passage 100. In the first opening 31 of the heat exchanger 3, the refrigerant flowing through the first passage 100 exchanges heat with the refrigerant in the first header 51, and the refrigerant in the first heat exchanger 3 passes from the first heat exchanger 3 to the first opening 31. The two openings 32 flow out and flow back into the compressor 1 through the throttling piece 4, the connecting pipe 6 and the flow direction conversion piece 2, so that in this mode, the gaseous refrigerant flowing out of the compressor 1 can be provided by setting the first passage 100 Exchange heat with the liquid refrigerant in the first header 51, thereby converting part of the liquid refrigerant in the first header 51 into gaseous refrigerant, accelerate the vaporization of the liquid refrigerant, increase the evaporation temperature, and delay the heating mode. The frost speed is conducive to the improvement of heat transfer performance.

When the heat exchange system is in the cooling mode, that is, the defrosting mode, the control member 16 is opened to conduct the above-mentioned section of the first connecting pipe, and the refrigerant flowing out of the compressor 1 passes through the conversion member 2 and then sequentially passes through the second heat exchange The device 5, the throttling element 4 and the first heat exchanger 3 flow back to the compressor 1 through the flow direction switching element 2.

Further, in the starting phase of the heating mode (frosting condition), the control member 16 is closed to disconnect the above-mentioned section of the first connecting pipeline.

In the stable phase of the heating mode (frosting condition), the control member 16 is opened to conduct the above-mentioned section of the first connecting pipe, and the refrigerant flowing out of the compressor 1 can flow into the first heat exchanger after flowing into the conversion member 2 3, and flow out from the second opening 32 of the first heat exchanger 3 and enter the first opening 501 of the second heat exchanger 5 through the throttle 4, and from the second opening 501 of the second heat exchanger 5 The two openings 502 flow out and flow back into the compressor 1 through the flow direction switching element 2.

In other words, in some specific embodiments, the control member 16 is only turned off during the activation phase of the heating mode to disconnect the above-mentioned section of the first connecting pipe, thereby delaying the frosting speed during the activation phase of the heating mode.

In some embodiments, the first opening 31 of the first heat exchanger 3 communicates with the second opening 102 of the compressor 1 through the flow direction conversion member 2, and the second header 52 communicates with the second opening 102 of the compressor 1 through the flow direction conversion member 2 An opening 101 is in communication. While the first opening 31 of the first heat exchanger 3 is in communication with the first opening 101 of the compressor 1, the second header 52 is in communication with the second opening 102 of the compressor 1; While the first opening 31 of the compressor 3 is in communication with the second opening 102 of the compressor 1, the second header 52 is in communication with the first opening 101 of the compressor 1.

In other words, the first opening 31 of the first heat exchanger 3 can be communicated with the first opening 101 of the compressor 1 through the flow direction converter 2, or can be communicated with the second opening 102 of the compressor 1, but with the compressor 1 The first opening 101 and the second opening 102 are not connected at the same time. The second header 52 can communicate with the second opening 102 of the compressor 1 through the flow direction conversion member 2, and can also communicate with the first opening of the compressor 1, but is connected to the first opening 101 and the second opening of the compressor 1. 102 is not connected at the same time. Moreover, when the first opening 31 of the first heat exchanger 3 communicates with the first opening 101 of the compressor 1, the second header 52 needs to communicate with the second opening 102 of the compressor 1. When the first opening 31 of the first heat exchanger 3 is in communication with the second opening 102 of the compressor 1, the second header 52 needs to be in communication with the first opening 101 of the compressor 1.

In some specific embodiments, the flow direction switching element 2 includes a first opening 21, a second opening 22, a third opening 23, and a fourth opening 24. For example, the flow direction switching element 2 is a four-way valve, and the flow direction switching element 2 is a first While the opening 21 is in communication with the second opening 22, the third opening 23 and the fourth opening 24 of the flow direction conversion element 2 are in communication. While the first opening 21 and the third opening 23 of the flow direction switching element 2 are in communication, the second opening 22 and the fourth opening 24 of the flow direction switching element 2 are in communication. When the first opening 21 and the second opening 22 of the flow direction conversion element 2 are in communication, the first opening 21 and the third opening 23 of the flow direction conversion element 2 are not connected.

When the heat exchange system is in the heating mode, the first opening 21 and the second opening 22 flowing to the conversion element 2 are communicated, and the third opening 23 and the fourth opening flowing to the conversion element 2 are communicated with each other, thereby communicating the first opening 101 and the compressor 1 The first opening 31 of the first heat exchanger 3 communicates with the second opening 102 of the compressor 1 and the second header 52, so that the refrigerant flowing out of the first opening 101 of the compressor 1 enters the second opening through the flow direction converter 2 A heat exchanger 3, and the refrigerant in the second heat exchanger 5 can flow back to the compressor 1 through the second opening 102 of the compressor 1.

In the starting phase of the heating mode, the control member 16 is closed to disconnect the first opening and the second opening of the control member 16, and the refrigerant flowing out of the first opening 101 of the compressor 1 flows to the conversion member 2 through the first passage 100. Entering the first heat exchanger 3, the refrigerant flowing through the first passage 100 can exchange heat with the refrigerant in the first header 51 of the second heat exchanger 5 and keep separate, so as to improve the performance of the second heat exchanger 5. Evaporation pressure slows down the speed of frosting.

In the stable stage of the heating mode, the control element 16 is opened to communicate the first opening and the second opening of the control element 16, and the refrigerant flowing out of the first opening 101 of the compressor 1 directly enters the first heat exchanger through the flow direction conversion element 2 3. No longer pass through the first channel 100.

In the cooling mode, the control member 16 is opened, the first opening 21 and the third opening 23 of the flow to the conversion member 2 are communicated, and the second opening 22 and the fourth opening 24 of the flow to the conversion member 2 are communicated, thereby communicating with the first opening of the compressor 1 101 and the second header 52 and communicate with the second opening 102 of the compressor 1 and the first opening 31 of the first heat exchanger 3, so that the refrigerant flowing out of the first opening 101 of the compressor 1 passes through the flow direction converter 2 Enter the second heat exchanger 5, and the refrigerant in the first heat exchanger 3 can flow back to the compressor 1 through the second opening 102 of the compressor 1.

In some embodiments, the heat exchange system further includes a second heat exchange tube 10, at least part of the second heat exchange tube 10 is provided in the first header 51, the second heat exchange tube 10 includes a channel, and the second heat exchange tube The passage of the tube 10 forms at least part of the first passage 100. Specifically, the second heat exchange tube 10 can penetrate the first header 5 along the length direction of the first header 5, that is, a part of the second heat exchange tube 10 is provided in the first header 5, and the second heat exchange tube The length direction of the heat pipe 10 and the length direction of the first header 51 are both left and right directions, and the second heat exchange tube 10 has a channel extending along its length direction. As shown in Figures 12 and 13, the right end of the second heat exchange tube 10 extends from the right end of the first header 51, and the left end of the second heat exchange tube 10 extends from the left end of the first header 51. . It can be understood that the present application is not limited to this. For example, as shown in FIG. 14, the second heat exchange tube 6 is entirely arranged in the first header 51.

In some specific embodiments, as shown in FIGS. 12 and 13, the passage of the second heat exchange tube 10 forms the first passage 100, and the first opening 110 of the first passage 100 is provided in the second heat exchange tube 10 in its At one end in the length direction, the second opening 111 of the first channel 100 is provided at the other end of the second heat exchange tube 10 in the length direction.

As shown in Figures 12 and 13, the extension direction of the channel of the second heat exchange tube 10 is substantially parallel to the extension direction of the chamber of the first header 51, that is, the length direction of the first channel 100 is substantially parallel to that of the first header 51. The length direction is generally parallel. The right end of the second heat exchange tube 10 is opened to form the first opening 110 of the first channel 100, and the left end of the second heat exchange tube 10 is opened to form the second opening 111 of the first channel 100.

Further, the first header 51 includes a chamber, and the chamber of the first header 51 includes a first chamber 511 and a second chamber 512. A first partition 513 extending along the length direction of the first header 51 is provided in the first header 51 to separate the first chamber 511 and the second chamber 512. The first partition 513 is provided with a through hole 5131, and the through hole 5131 communicates with the first chamber 511 and the second chamber 512. At least one first heat exchange tube 53 communicates with the first chamber 511 of the first header 51 and the second header 52, and the second heat exchange tube 10 is provided in the second chamber 512 of the first header 51.

As shown in FIG. 13, the first partition 513 is provided in the first header 51 and the longitudinal direction of the first partition 513 is substantially parallel to the longitudinal direction of the first header 5, so as to connect the first header 51 The chamber is divided into a first chamber 511 and a second chamber 512. The first partition 513 is provided with a plurality of through holes 5131 arranged at intervals along the length direction of the first partition 513, and the plurality of through holes 5131 communicate with the first chamber 511 and the second chamber 512. The first heat exchange tube 53 is connected with the first header 51 to connect the first heat exchange tube 53 and the first chamber 511, that is, the first chamber 511 passes through the first heat exchange tube 53 and the second header 52 Connected, the second heat exchange tube 10 penetrates the second chamber 512 of the first header 51.

In other specific embodiments, as shown in FIG. 14, the heat exchange system further includes a first tube 11 and a second tube 12, and the first tube 11 and the second tube 12 are arranged at intervals.

There are a plurality of second heat exchange tubes 10, the plurality of second heat exchange tubes 10 are arranged at intervals along the length direction of the first tube 11, and one end of at least one second heat exchange tube 10 in its length direction is connected to the first tube 11, the other end of the second heat exchange tube 10 in its length direction is connected to the second tube 12 to connect the first tube 11 and the second tube 12.

The first tube 11, the second tube 12, and a plurality of second heat exchange tubes 10 are arranged in the first header 51. The first tube 11 includes a chamber, the second tube 12 includes a chamber, and the first channel 100 includes a first A chamber of a tube 11, a plurality of channels of the second heat exchange tubes 10, and a chamber of the second tube 12.

As shown in FIG. 14, the length direction of the second heat exchange tube 10 and the length direction of the first header 51 are both left and right directions and there are multiple, and the plurality of second heat exchange tubes 10 are all located in the first header 51. Inside. The first tube 11 and the second tube 12 both extend in the up and down direction and are spaced apart in the left and right direction. A plurality of second heat exchange tubes 10 are connected between the first tube 11 and the second tube 12, that is, each second tube The right end of the heat pipe 10 is connected to the first tube 11, and the left end of each second heat exchange tube 10 is connected to the second tube 12 to communicate the first tube 11 and the second tube 12, wherein the first channel 100 includes a first tube A chamber of a tube 11, a plurality of channels of the second heat exchange tubes 10, and a chamber of the second tube 12.

In other words, in this embodiment, the first passage 100 is formed by a relatively small heat exchanger.

Further, the heat exchange system further includes a first connection pipe 13 and a second connection pipe 14. One end of the first connection pipe 13 is connected to the first pipe 11 and is located in the first header 51, and the other end of the first connection pipe 13 The portion is located outside the first header 51, and the first opening 61 of the first channel 100 is provided at the other end of the first connecting pipe 13. One end of the second connecting pipe 14 is connected to the second pipe 12 and is located in the first header 51, the other end of the second connecting pipe 14 is located outside the first header 51, and the second opening of the first channel 100 62 is provided at the other end of the second connector 14.

As shown in Fig. 14, the first connecting pipe 13 and the second connecting pipe 14 both extend in the left-right direction, and the left end of the first connecting pipe 13 is connected to and communicated with the first pipe 11, and the right end of the first connecting pipe 13 is open to form a The first opening 110 of a channel 100, the right end of the second connecting pipe 14 and the second pipe 12 are connected and communicating with each other, and the left end of the second connecting pipe 14 is opened to form the second opening 111 of the second channel 6. In other words, the passage of the first connecting pipe 13, the cavity of the first pipe 11, the passages of the plurality of second heat exchange tubes 10, the cavity of the second pipe 12 and the passage of the second connecting pipe 14 form the first passage 100.

Specifically, the heat exchange system includes second fins 15, and the second fins 15 are arranged between adjacent second heat exchange tubes 10. By arranging the second fins 15 between the adjacent second heat exchange tubes 10, the heat exchange area of the two adjacent second heat exchange tubes 10 can be increased, and the heat exchange efficiency can be improved.

It can be understood that the application of the first channel 100 is not limited to the embodiment shown in FIGS. 12-14. For example, in some embodiments, the first header 51 includes a chamber, and the chamber of the first header 51 includes a first chamber 511 and a second chamber 512. A second partition 514 extending in the length direction of the header 51 separates the first chamber 511 and the second chamber 512. At least one first heat exchange tube 53 communicates with the first chamber 511 of the first header 51 and the second header 52. The second chamber 512 of the first header 51 is the first channel 100, and the refrigerant in the second chamber 512 of the first header 51 is exchanged with the refrigerant in the first chamber 511 of the first header 51 heat.

As shown in FIG. 15, the second partition plate 514 is provided in the first header 51 and the length direction of the second partition plate 514 is substantially parallel to the length direction of the first header 5 to connect the first header 51 The chamber is divided into a first chamber 511 and a second chamber 512. The first heat exchange tube 53 is connected with the first header 51 to connect the first heat exchange tube 53 and the first chamber 511, that is, the first chamber 511 passes through the first heat exchange tube 53 and the second header 52 Connected. The second chamber 512 of the first header 51 forms the first channel 100.

In some embodiments, as shown in Figures 9, 11, 16 and 17, the heat exchange system further includes a gas-liquid separator 9. The gas-liquid separator 9 includes a first opening and a second opening. The first opening is in communication with the flow direction converter 2, and the second opening of the gas-liquid separator 9 is in communication with the second opening 102 of the compressor 1.

Specifically, the fourth opening 24 of the flow direction conversion element 2 is in communication with the first opening 201 of the gas-liquid separator 9. By providing a gas-liquid separator 9 between the flow direction converter 2 and the second opening 102 of the compressor 1, in the heating mode, the liquid refrigerant and the gaseous refrigerant can be separated and the liquid refrigerant can be stored in the gas-liquid separator 9 , And the gaseous refrigerant returns to the compressor 1, that is, to prevent the liquid refrigerant from returning to the compressor 1, thereby reducing the risk of the compressor 1 liquid shock.

Further, the heat exchange system further includes a second passage 200, at least part of the second passage 200 is provided in the gas-liquid separator 9 so that the refrigerant in the second passage 200 exchanges heat with the refrigerant in the gas-liquid separator 9, and When the refrigerant in the second passage 200 exchanges heat with the refrigerant in the gas-liquid separator 9, the refrigerant in the second passage 200 is kept separate from the refrigerant in the gas-liquid separator 9, and the first opening 110 of the first passage 100 passes through The second passage 200 communicates with the first opening 101 of the compressor 1, and the first opening 161 of the control member 16 communicates with the first opening 110 of the first passage 100 through the second passage 200. As shown in FIG. 16 and FIG. 17, the seventh pipeline added between the first opening 101 of the compressor 1 and the flow direction conversion member 2 first passes through the gas-liquid separator 9 and then passes through the first header 51. The refrigerant in the portion of the seventh pipeline located in the gas-liquid separator 9 can exchange heat with the gas-liquid separator 9. The second passage 200 includes a first opening 201 and a second opening 202. The first opening 201 of the second passage 200 communicates with the first opening 101 of the compressor 1 and the first opening 161 of the control member 16, and the second passage 200 The second opening 202 is in communication with the first opening 110 of the first passage 100.

In some embodiments, as shown in Figures 9-17, the second heat exchanger 5 further includes a first connecting pipe 55 and a second connecting pipe 56, the first connecting pipe 55 is in communication with the first header 51, and the One end of a connecting pipe 55 is located outside the first header 51. One end of the second connecting pipe 56 is connected with one end of the second collecting pipe 52 to communicate the second connecting pipe 56 and the second collecting pipe 52, and the other end of the second connecting pipe 56 is switched to the flow direction. Piece 2 is connected. As shown in Figures 9-17, the upper right end of the first connecting pipe 55 is located outside the first collecting pipe 51, the lower right end of the second connecting pipe 56 is located outside the second collecting pipe 52, and the second connecting pipe 56 The upper left end of the second header 52 is connected to the right end of the second header 52 to communicate the second connecting tube 56 and the second header 52.

For the first connecting pipe 51, in some specific embodiments, the other end of the first connecting pipe 55 may be connected to the right end of the first collecting pipe 51 to communicate the first connecting pipe 55 and the first collecting pipe. Tube 51. As shown in FIGS. 9-17, the lower left end of the first connecting pipe 55 is connected to the right end of the first header 51. The present application is not limited to this. For example, in other specific embodiments, the other end of the first connecting pipe 55 and a section adjacent to the other end are located in the first header 51, and the first connecting pipe 55 A through hole is provided for connecting the first connecting pipe 55 and the first collecting pipe 51. As shown in Figures 9-17, the left part of the first connecting pipe 55 extends into the first header 51, and the left part of the first connecting pipe 55 is provided with a through hole to connect the first connecting pipe 55 and the first connecting pipe 55. A collecting pipe 51. The refrigerant can enter the first header 51 through the first connecting pipe 55 and the through holes on the first connecting pipe 55.

It can be understood that the present application is not limited to the embodiments shown in FIGS. 9-17. Hereinafter, a heat exchange system according to another embodiment of the present invention will be described with reference to FIG. 18 and FIG. 19.

As shown in Figures 18 and 19, and with reference to the labeling of the opening in Figure 11, the heat exchange system according to the embodiment of the present invention includes a compressor 1, a first heat exchanger 3, a second heat exchanger 5, and a throttle 4 , The flow direction conversion element 2 and the gas-liquid separator 9, the compressor 1 includes a first opening and a second opening, the first heat exchanger 3 includes a first opening and a second opening, and the throttling member 4 includes a first opening and a second opening , The second heat exchanger 5 includes a first opening and a second opening, the gas-liquid separator 9 includes a first opening and a second opening, and the first opening 31 of the first heat exchanger 3 passes through the flow direction converter 2 and the compressor 1 The first opening 101 of the first heat exchanger 3 is connected, the second opening 32 of the first heat exchanger 3 is connected with the first opening 41 of the throttle 4, and the second opening 42 of the throttle 4 is connected with the first opening of the second heat exchanger 5 501 is connected, the second opening 502 of the second heat exchanger 5 is in communication with the first opening of the gas-liquid separator 9 through the flow direction converter 2, and the second opening of the gas-liquid separator 9 is in communication with the second opening 102 of the compressor 1 When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the flow direction conversion member 2 is used to change the flow direction of the refrigerant in the heat exchange system.

Specifically, adjacent devices in the heat exchange system are connected at least by pipelines. In other words, the first opening 101 of the compressor 1 and the flow direction conversion element 2 are connected by at least a first pipeline, and the flow direction conversion element 2 and the first The first openings 31 of the heat exchanger 3 are connected by at least a second pipeline, and the second openings 32 of the first heat exchanger 3 and the first opening 41 of the throttle 4 are connected by at least a third pipeline, The second opening 42 of the throttling element 4 and the first opening 501 of the second heat exchanger 5 are connected by at least a fourth pipeline, and the second opening 502 of the second heat exchanger 5 and the flow direction conversion element 2 are at least Connected by the fifth pipeline, the flow direction conversion element 2 and the first opening 201 of the gas-liquid separator 9 are connected by at least a sixth pipeline, the second opening 202 of the gas-liquid separator 9 and the second opening 102 of the compressor 1 They are connected by at least an eighth pipeline.

The heat exchange system also includes a second channel 200. At least part of the second channel 200 is provided in the gas-liquid separator 9 so that the refrigerant in the second channel 200 exchanges heat with the refrigerant in the gas-liquid separator 9, and in the second When the refrigerant in the passage 200 exchanges heat with the refrigerant in the gas-liquid separator 9, the refrigerant in the second passage 200 is kept separate from the refrigerant in the gas-liquid separator 9. The second passage 200 includes a first opening and a second opening, The first opening 201 of the second passage 200 communicates with the first opening 101 of the compressor 1, and the second opening 202 of the second passage 200 communicates with the flow direction converter 2.

In other words, an additional pipeline, such as a seventh pipeline, is added between the first opening 101 of the compressor 1 and the flow direction conversion element 2. The seventh pipeline flows through the gas-liquid separator 9 and one end of the seventh pipeline The opening is connected with the first opening 101 of the compressor 1, and the other end opening of the seventh pipeline is connected with the flow direction switching element 2, wherein the refrigerant in the portion of the seventh pipeline located in the gas-liquid separator 9 can be It can exchange heat with the refrigerant in the gas-liquid separator 9. Specifically, one end of the seventh pipeline is connected to the first pipeline between the compressor 1 and the flow direction converter 2, the other end of the seventh pipeline is connected to the first pipeline, and the seventh pipeline is connected to the first pipeline. One end of the pipeline and the other end of the seventh pipeline are spaced apart on the first pipeline.

According to the heat exchange system of the embodiment of the present invention, by providing the second passage 200 to communicate with the first opening 101 of the compressor 1 and the flow direction conversion element 2, the refrigerant flowing through the second passage 200 can interact with the refrigerant in the gas-liquid separator 9 During the heat exchange, the refrigerant in the second channel 200 can be kept separated from the refrigerant in the gas-liquid separator 9, which accelerates the vaporization of the liquid refrigerant, increases the evaporation temperature, delays the frosting speed of the heating mode, and improves Heat transfer performance.

Moreover, since the vaporization of the liquid refrigerant is accelerated, the amount of gaseous refrigerant entering the compressor 1 is increased, and the risk of compressor liquid shock is reduced.

In some embodiments, the heat exchange system further includes a control element 16, which includes a first opening and a second opening, and the first opening of the control element 16 is connected to the first opening 101 of the compressor 1 and the second passage 200 of the compressor 1. An opening 201 is in communication, the second opening of the control member 16 is in communication with the second opening 202 of the second passage 200 and the flow direction switching member 2, and the control member 16 can be opened to communicate with the first opening 161 and the second opening 162 of the control member 16 Connecting the first opening 101 of the compressor 1 and the flow direction switching member 2, the control member 16 can be closed to disconnect the first opening 161 and the second opening 162 of the control member 16 to disconnect the first opening 101 and the flow direction switching member of the compressor 1 Piece 2.

In other words, a section of the first connecting pipeline between one end of the seventh pipeline and the other end of the seventh pipeline is provided with a control member 16, and the control member 16 can be opened to enable the above-mentioned first connecting pipeline One section is turned on, the first opening 101 of the compressor 1 communicates with the flow direction switching member 2 through the control member 16. When the control member 16 is closed, the above section of the first connecting pipeline can be disconnected, and the first opening 101 of the compressor 1 passes The second passage 200 is in communication with the flow direction conversion member 2.

When the heat exchange system is in use, in the heating mode (frosting condition), the control member 16 is closed to disconnect the above-mentioned section of the first connecting pipe, and the refrigerant flowing out of the compressor 1 can enter the first through the second passage 200 In the first opening 31 of the heat exchanger 3, the refrigerant flowing through the second passage 200 exchanges heat with the refrigerant in the gas-liquid separator 9, and the refrigerant in the first heat exchanger 3 passes from the second The opening 32 flows out and flows back into the compressor 1 through the throttle member 4, the connecting pipe 6 and the flow direction conversion member 2 in sequence, so that in this mode, the gaseous refrigerant flowing out of the compressor 1 can be combined with the second passage 200 in this mode. The liquid refrigerant in the gas-liquid separator 9 exchanges heat, thereby converting part of the liquid refrigerant in the gas-liquid separator 9 into a gaseous refrigerant, which accelerates the vaporization of the liquid refrigerant, increases the evaporation temperature, and delays the frosting of the heating mode Speed is conducive to the improvement of heat exchange performance.

In some embodiments, the first opening 31 of the first heat exchanger 3 communicates with the second opening 102 of the compressor 1 through the flow direction conversion element 2, and the second opening 502 of the second heat exchanger 5 communicates with the second opening 102 of the compressor 1 through the flow direction conversion element 2 The first opening 101 of the compressor 1 is in communication, while the first opening 31 of the first heat exchanger 3 is in communication with the first opening 101 of the compressor 1, while the second opening 502 of the second heat exchanger 5 is connected to the compressor 1 The second opening 102 is in communication; while the first opening 31 of the first heat exchanger 3 is in communication with the second opening 102 of the compressor 1, the second opening 502 of the second heat exchanger 5 is in communication with the first opening 101 of the compressor 1 Connected.

In some specific embodiments, the flow direction switching element 2 includes a first opening, a second opening, a third opening, and a fourth opening. While the first opening 21 of the flow direction switching element 2 is in communication with the second opening, the flow direction switching element 2 is in communication with the second opening. The third opening 23 is in communication with the fourth opening. While the first opening 21 of the flow direction switching element 2 is in communication with the third opening, the second opening 22 and the fourth opening of the flow direction switching element 2 are in communication with each other. When the first opening 21 of the flow direction switching element 2 communicates with the second opening, the first opening 21 and the third opening of the flow direction switching element 2 are not connected.

When the heat exchange system is in the heating mode, the first opening 21 of the flow to the conversion element 2 communicates with the second opening, and the third opening 23 and the fourth opening 24 of the flow to the conversion element 2 are communicated, thereby communicating the first opening 101 and the compressor 1 The first opening 31 of the first heat exchanger 3 communicates with the second opening 102 of the compressor 1 and the second opening 502 of the second heat exchanger 5, so that the refrigerant flowing out of the first opening 101 of the compressor 1 passes through the flow direction The conversion element 2 enters the first heat exchanger 3, and the refrigerant in the second heat exchanger 5 can be returned to the compressor 1 through the second opening 102 of the compressor 1.

In the starting phase of the heating mode, the control element 16 is closed to disconnect the first opening and the second opening of the control element 16, and the refrigerant flowing out of the first opening 101 of the compressor 1 flows to the conversion element 2 through the second passage 200. Entering the first heat exchanger 3, the refrigerant flowing through the second passage 200 can exchange heat with the refrigerant in the gas-liquid separator 9.

In the stable stage of the heating mode, the control element 16 is opened to communicate the first opening and the second opening of the control element 16, and the refrigerant flowing out of the first opening 101 of the compressor 1 directly enters the first heat exchanger through the flow direction conversion element 2 3. No longer pass through the second channel 200.

In some embodiments, the second heat exchanger 5 includes a first header 51, a second header 52 and a plurality of first heat exchange tubes 51. The first header 51 and the second header 52 are arranged at intervals. As shown in FIGS. 17 and 18, the first header 51 and the second header 52 are arranged substantially in parallel and spaced apart in the vertical direction, and the first header 51 is located below the second header 52.

A plurality of first heat exchange tubes 53 are arranged at intervals along the length direction of the first header 51, and at least one first heat exchange tube 53 is connected to the first header 51 at one end of its length direction. The other end of the heat exchange tube 53 in its length direction is connected to the second header 52 to communicate the first header 51 and the second header 52. As shown in Figures 17 and 18, the length direction of the heat exchange tube 53 is up and down, the upper end of the heat exchange tube 53 is connected to the first header 51, and the lower end of the heat exchange tube 53 is connected to the second header 52. As a result, the first header 51 and the second header 52 are in communication with each other through the heat exchange tube 53.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , The structure, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction relationship between two components, Unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless expressly stipulated and defined otherwise, the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. contact. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than that of the second feature. The “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the level of the first feature is smaller than the second feature.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiment undergoes changes, modifications, substitutions, and modifications.

Claims

A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling element, and a flow direction conversion element. The compressor includes a first opening and a second opening. A heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, the first heat exchanger The first opening of the first heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, the second opening of the first heat exchanger is communicated with the first opening of the throttle member, and the second opening of the throttle member communicates with the first opening of the throttle member. The second opening is in communication with the first opening of the second heat exchanger, the second opening of the second heat exchanger is in communication with the second opening of the compressor through the flow direction conversion element, and the heat exchange system During operation, the heat exchange system is filled with refrigerant, and the flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system,

The heat exchange system further includes a connecting pipe and a heating device. The connecting pipe includes a first opening and a second opening. The first opening of the connecting pipe is connected to the first opening of the second heat exchanger and the section. The second opening of the flow element is in communication, the second opening of the connecting pipe is in communication with the second opening of the second heat exchanger, and the second opening of the connecting pipe communicates with the compressor through the flow direction conversion element. The second opening is in communication, and the heating device is arranged on the connecting pipe.
The heat exchange system according to claim 1, further comprising a control element provided on the connecting pipe for connecting or disconnecting the first opening of the connecting pipe and the connecting pipe The second opening.
The heat exchange system according to claim 2, wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion element, and the second heat exchanger The second opening of the first heat exchanger is in communication with the first opening of the compressor through the flow direction conversion member. While the first opening of the first heat exchanger is in communication with the first opening of the compressor, the second The second opening of the heat exchanger is in communication with the second opening of the compressor; while the first opening of the first heat exchanger is in communication with the second opening of the compressor, the first opening of the second heat exchanger is in communication with the second opening of the compressor. The two openings are in communication with the first opening of the compressor,

The flow direction conversion member includes a first opening, a second opening, a third opening, and a fourth opening. The first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening is in communication with the first opening of the first heat exchanger, the third opening of the flow direction converter is in communication with the second opening of the second heat exchanger, and the fourth opening of the flow direction converter is in communication with the The second opening of the compressor is connected,

In the heating mode of the heat exchange system, the first opening of the flow direction converter communicates with the second opening to communicate the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the conversion member communicates with the fourth opening to communicate with the second opening of the compressor and the second opening of the second heat exchanger, and the control member opens to communicate with the first opening of the connecting pipe. In the second opening, the heating device is opened to heat the refrigerant in the connecting pipe.
The heat exchange system according to any one of claims 1 to 3, wherein the heating device is an electric heating wire, and the electric heating wire is provided in the connecting tube; or the electric heating device is an electric heating tube, The electric heating pipe is arranged in the connecting pipe; or the electric heating device is an electric heating belt, and the electric heating belt is wound around the outer wall of the connecting pipe.
The heat exchange system according to any one of claims 1-3, wherein the second heat exchanger comprises:

A first header and a second header, the first header and the second header are arranged at intervals, and the first header is adjacent to the first opening of the second heat exchanger And connected, the second header is adjacent to and communicated with the second opening of the second heat exchanger;

A plurality of first heat exchange tubes, the plurality of first heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one end of the first heat exchange tube in the length direction is connected to The first header is connected, and the other end of the first heat exchange tube in its length direction is connected with the second header to communicate with the first header and the second header ；

The first tube, the first tube is in communication with the first header, and one end of the first tube is located outside the first header, the first opening of the second heat exchanger Set at the one end of the first tube;

The second tube, the second tube is in communication with the second header, and one end of the second tube is located outside the second header, the second opening of the second heat exchanger It is provided at the one end of the second tube.
The heat exchange system according to claim 5, wherein the first opening of the connecting pipe is provided at one end of the connecting pipe, and the one end of the connecting pipe is connected to the The one end is connected, or the one end of the connecting pipe is connected with the one end of the first header to communicate the connecting pipe and the first header,

The second opening of the connecting pipe is provided at the other end of the connecting pipe, and the other end of the connecting pipe is connected to the other end of the second pipe.
The heat exchange system according to claim 6, wherein the other end of the first tube and a section adjacent to the other end are located in the first header, and all of the first tube The one section is provided with a through hole connecting the first pipe and the first header.
The heat exchange system according to claim 6, wherein the first header includes two ends spaced apart in its length direction, and the connection between the connecting tube and the first header Away from the two ends of the first header.
The heat exchange system according to claim 5, wherein the first heat exchange tube is a flat tube, and the first heat exchange tube includes a first side surface and a second side surface disposed oppositely, and a third side surface disposed oppositely. Side and fourth side, the distance between the first side and the second side of the first heat exchange tube is smaller than the distance between the third side and the fourth side of the first heat exchange tube, the first The heat exchange tube further includes a plurality of passages arranged at intervals, the first heat exchange tube communicates with the first header and the second header through the passage, each of the plurality of first heat exchange tubes One of the first heat exchange tubes communicates with the first header and the second header, and the relationship between the connecting tube and the first heat exchange tube of the second heat exchanger is:

A≥0.5·n·C, where A is the flow area of the connecting pipe, C is the flow area of a single first heat exchange tube, and n is the number of the first heat exchange tubes in the heat exchanger.
A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling element, and a flow direction conversion element. The compressor includes a first opening and a second opening. A heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, the first heat exchanger The first opening of the first heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, the second opening of the first heat exchanger is communicated with the first opening of the throttle member, and the second opening of the throttle member communicates with the first opening of the throttle member. The second opening is in communication with the first opening of the second heat exchanger, the second opening of the second heat exchanger is in communication with the second opening of the compressor through the flow direction conversion element, and the heat exchange system During operation, the heat exchange system is filled with refrigerant, and the flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system,

The heat exchange system further includes a heating device disposed between the second opening of the second heat exchanger and the second opening of the compressor.
The heat exchange system according to claim 10, wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion element, and the second heat exchanger The second opening is in communication with the first opening of the compressor through the flow direction conversion member,

While the first opening of the first heat exchanger is in communication with the first opening of the compressor, the second opening of the second heat exchanger is in communication with the second opening of the compressor, and the first While the first opening of the heat exchanger is in communication with the second opening of the compressor, the second opening of the second heat exchanger is in communication with the first opening of the compressor,

The flow direction conversion member includes a first opening, a second opening, a third opening, and a fourth opening. The first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening is in communication with the first opening of the first heat exchanger, the third opening of the flow direction converter is in communication with the second opening of the second heat exchanger, and the fourth opening of the flow direction converter is in communication with the The second opening of the compressor is connected,

When the heat exchange system is in the heating mode, the first opening of the flow direction converter communicates with the second opening to communicate the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the converter communicates with the fourth opening to communicate the second opening of the compressor and the second opening of the second heat exchanger, and the heating device is turned on to connect to the second heat exchanger. At least a part between the second opening of the compressor and the second opening of the compressor heats the refrigerant.
The heat exchange system according to claim 10 or 11, further comprising a gas-liquid separator, the gas-liquid separator comprising a first opening and a second opening, the first opening of the gas-liquid separator and The flow direction conversion element is in communication, the second opening of the gas-liquid separator is in communication with the second opening of the compressor, and the heating device is provided in the gas-liquid separator.
The heat exchange system according to claim 12, wherein the heating device is an electric heating wire, and the electric heating wire is provided in the gas-liquid separator;

Or the electric heating device is an electric heating tube, and the electric heating tube is arranged in the gas-liquid separator;

Or the electric heating device is an electric heating belt, and the electric heating belt is wound around the outer wall of the gas-liquid separator.
A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling element and a flow direction conversion element. The compressor comprises a first opening and a second opening. A heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, and the first opening of the first heat exchanger passes through the flow direction conversion member and the compressor The first opening is in communication, and the second opening of the first heat exchanger is in communication with the first opening of the throttle. When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the flow direction is switched Parts are used to change the flow direction of the refrigerant in the heat exchange system,

The second heat exchanger includes a first header, a second header, and a plurality of first heat exchange tubes, the first header and the second header are arranged at intervals, and the plurality of The first heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one end of the first heat exchange tube in the length direction is connected to the first header. The other end of the heat exchange tube in its length direction is connected to the second header to communicate with the first header and the second header, the first header and the section The second opening of the flow element is in communication, and the second header is in communication with the second opening of the compressor through the flow direction switching element,

The heat exchange system further includes a heating device, and the heating device is arranged in the first header.
The heat exchange system according to claim 14, wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion element, and the second header Communicate with the first opening of the compressor through the flow direction conversion member,

While the first opening of the first heat exchanger is in communication with the first opening of the compressor, the second header is in communication with the second opening of the compressor; While the first opening is in communication with the second opening of the compressor, the second header is in communication with the first opening of the compressor,

The flow direction conversion member includes a first opening, a second opening, a third opening, and a fourth opening. The first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening is in communication with the first opening of the first heat exchanger, the third opening of the flow direction converter is in communication with the second opening of the second heat exchanger, and the fourth opening of the flow direction converter is in communication with the The second opening of the compressor is connected,

When the heat exchange system is in the heating mode, the first opening of the flow direction converter communicates with the second opening to communicate the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the converter communicates with the fourth opening to communicate the second opening of the compressor and the second header, and the heating device is turned on to heat the refrigerant in the first header .
The heat exchange system according to claim 14 or 15, further comprising a gas-liquid separator, the gas-liquid separator comprising a first opening and a second opening, the first opening of the gas-liquid separator and The flow direction conversion member is in communication, and the second opening of the gas-liquid separator is in communication with the second opening of the compressor.
A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling element, and a flow direction conversion element. The compressor includes a first opening and a second opening. A heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, and the first opening of the first heat exchanger passes through the flow direction conversion member and the compressor The first opening is in communication, and the second opening of the first heat exchanger is in communication with the first opening of the throttle. When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the flow direction is switched Parts are used to change the flow direction of the refrigerant in the heat exchange system,

The second heat exchanger includes a first header, a second header, and a plurality of first heat exchange tubes, the first header and the second header are arranged at intervals, and the plurality of The first heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one end of the first heat exchange tube in the length direction is connected to the first header. The other end of the heat exchange tube in its length direction is connected to the second header to communicate with the first header and the second header, the first header and the section The second opening of the flow element is in communication, and the second header is in communication with the second opening of the compressor through the flow direction switching element,

The heat exchange system further includes a first channel, at least part of the first channel is provided in the first header so that the refrigerant in the first channel exchanges heat with the refrigerant in the first header , And when the refrigerant in the first passage exchanges heat with the refrigerant in the first header, the refrigerant in the first passage is kept separate from the refrigerant in the first header, and the first The passage includes a first opening and a second opening, the first opening of the first passage communicates with the first opening of the compressor, and the second opening of the first passage communicates with the flow direction conversion member.
The heat exchange system according to claim 17, further comprising a control element, the control element comprising a first opening and a second opening, the first opening of the control element and the first opening of the compressor Communicates with the first opening of the first passage, the second opening of the control member communicates with the second opening of the first passage and the flow direction conversion member, and the control member can be opened to communicate with the compressor The first opening of the compressor and the flow direction conversion member, the control member can be closed to disconnect the first opening of the compressor and the flow direction conversion member.
The heat exchange system according to claim 18, wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion element, and the second header The first opening of the first heat exchanger is in communication with the first opening of the compressor through the flow direction conversion element, and the second header is in communication with the first opening of the compressor. The second opening of the compressor is in communication; while the first opening of the first heat exchanger is in communication with the second opening of the compressor, the second header is in communication with the first opening of the compressor ,

The flow direction conversion member includes a first opening, a second opening, a third opening, and a fourth opening. The first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening is in communication with the first opening of the first heat exchanger, the third opening of the flow direction converter is in communication with the second opening of the second heat exchanger, and the fourth opening of the flow direction converter is in communication with the The second opening of the compressor is connected,

When the heat exchange system is in the heating mode, the first opening of the flow direction converter communicates with the second opening to communicate the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the conversion member communicates with the fourth opening to communicate the second opening of the compressor and the second header, and the control member is closed to disconnect the first opening of the compressor from the second header.述流向转件。 Said flow conversion.
The heat exchange system according to any one of claims 17-19, further comprising a second heat exchange tube, at least part of the second heat exchange tube is provided in the first header, so The second heat exchange tube includes a channel, and the channel of the second heat exchange tube forms at least part of the first channel.
The heat exchange system according to claim 20, wherein the channel of the second heat exchange tube forms the first channel, and the first opening of the first channel is provided in the second heat exchange tube. On one end of the longitudinal direction, the second opening of the first channel is provided at the other end of the second heat exchange tube in the longitudinal direction.
The heat exchange system of claim 21, wherein the first header includes a chamber, the chamber of the first header includes a first chamber and a second chamber, and the first A header is provided with a first partition extending along the length of the first header to separate the first chamber and the second chamber, and the first partition is provided with a through hole to communicate with each other. The first chamber and the second chamber, the at least one first heat exchange tube is connected to the first chamber of the first header and the second header, and the second heat exchange tube is provided with In the second chamber of the first header.
The heat exchange system according to claim 22, further comprising a first tube and a second tube, the first tube and the second tube are arranged at intervals, and the second heat exchange tube is multiple, A plurality of the second heat exchange tubes are arranged at intervals along the length direction of the first tube, at least one of the second heat exchange tubes is connected to the first tube at one end in the length direction thereof, and the second The other end of the heat exchange tube in its length direction is connected to the second tube to communicate the first tube and the second tube,

The first tube, the second tube, and a plurality of the second heat exchange tubes are arranged in the first header, the first tube includes a cavity, and the second tube includes a cavity, so The first channel includes a cavity of the first tube, a plurality of channels of the second heat exchange tube, and a cavity of the second tube.
The heat exchange system according to any one of claims 17-19, wherein the first header includes a chamber, and the chamber of the first header includes a first chamber and a second chamber. A chamber, the first header is provided with a second partition extending along the length of the first header to separate the first chamber and the second chamber, and the at least one first changer The heat pipe communicates with the first chamber of the first header and the second header, the second chamber of the first header is the first channel, and the first header The refrigerant in the second chamber exchanges heat with the refrigerant in the first chamber of the first header.
The heat exchange system according to any one of claims 17-24, further comprising a gas-liquid separator, the gas-liquid separator comprising a first opening and a second opening, the gas-liquid separator The first opening is in communication with the flow direction conversion member, and the second opening of the gas-liquid separator is in communication with the second opening of the compressor.
The heat exchange system according to claim 25, further comprising a second passage, at least part of the second passage is provided in the gas-liquid separator so that the refrigerant in the second passage is The refrigerant in the gas-liquid separator exchanges heat, and when the refrigerant in the second channel exchanges heat with the refrigerant in the gas-liquid separator, the refrigerant in the second channel exchanges heat with the gas-liquid separator The refrigerant inside is kept separated, the first opening of the first passage communicates with the first opening of the compressor through the second passage, and the first opening of the control member communicates with the first opening of the compressor through the second passage. The first opening of a channel communicates.
A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttle, a flow direction converter and a gas-liquid separator, the compressor comprising a first opening and a second opening , The first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, the gas The liquid separator includes a first opening and a second opening. The first opening of the first heat exchanger communicates with the first opening of the compressor through the flow direction conversion element. The second opening of the first heat exchanger is The opening is in communication with the first opening of the throttle, the second opening of the throttle is in communication with the first opening of the second heat exchanger, and the second opening of the second heat exchanger passes through the The flow direction conversion element is in communication with the first opening of the gas-liquid separator, and the second opening of the gas-liquid separator is in communication with the second opening of the compressor. When the heat exchange system is working, the heat exchange system Is filled with refrigerant, and the flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system,

The heat exchange system further includes a second channel, at least part of the second channel is provided in the gas-liquid separator so that the refrigerant in the second channel exchanges heat with the refrigerant in the gas-liquid separator , And when the refrigerant in the second passage exchanges heat with the refrigerant in the gas-liquid separator, the refrigerant in the second passage is kept separate from the refrigerant in the gas-liquid separator, and the second The passage includes a first opening and a second opening, the first opening of the second passage communicates with the first opening of the compressor, and the second opening of the second passage communicates with the flow direction conversion member.
The heat exchange system according to claim 27, further comprising a control element, the control element comprising a first opening and a second opening, the first opening of the control element and the first opening of the compressor Communicates with the first opening of the second passage, the second opening of the control member communicates with the second opening of the second passage and the flow direction conversion member, and the control member can be opened to communicate with the compressor The first opening of the compressor and the flow direction conversion member, the control member can be closed to disconnect the first opening of the compressor and the flow direction conversion member.
The heat exchange system according to claim 28, wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion element, and the second heat exchanger The second opening of the first heat exchanger is in communication with the first opening of the compressor through the flow direction conversion member. While the first opening of the first heat exchanger is in communication with the first opening of the compressor, the second The second opening of the heat exchanger is in communication with the second opening of the compressor; while the first opening of the first heat exchanger is in communication with the second opening of the compressor, the first opening of the second heat exchanger is in communication with the second opening of the compressor. The two openings are in communication with the first opening of the compressor,

The flow direction conversion member includes a first opening, a second opening, a third opening, and a fourth opening. The first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening is in communication with the first opening of the first heat exchanger, the third opening of the flow direction converter is in communication with the second opening of the second heat exchanger, and the fourth opening of the flow direction converter is in communication with the The second opening of the compressor is connected,

When the heat exchange system is in the heating mode, the first opening of the flow direction converter communicates with the second opening to communicate the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the conversion member communicates with the fourth opening to communicate the second opening of the compressor and the second opening of the second heat exchanger, and the control member is closed to disconnect the first opening of the compressor. An opening and the flow direction conversion piece.
The heat exchange system according to any one of claims 27-29, wherein the second heat exchanger comprises:

A first header and a second header, the first header and the second header are arranged at intervals;

A plurality of first heat exchange tubes, the plurality of first heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one end of the first heat exchange tube in the length direction is connected to The first header is connected, and the other end of the first heat exchange tube in its length direction is connected with the second header to communicate with the first header and the second header .