WO2020143540A1

WO2020143540A1 - Heat exchanger and air conditioner

Info

Publication number: WO2020143540A1
Application number: PCT/CN2020/070182
Authority: WO
Inventors: 王飞; 许文明; 付裕; 郭刚; 张心怡
Original assignee: 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2019-01-10
Filing date: 2020-01-03
Publication date: 2020-07-16
Also published as: CN109751754B; CN109751754A

Abstract

A heat exchanger and an air conditioner, the heat exchanger comprising a heat exchange pipe group (1), a supercooling pipe group (2), a supercooling bypass pipe (3), a first one-way valve (4), a second one-way valve (5) and a third one-way valve (6), wherein a first end of the supercooling bypass pipe (3) is connected to a parallel branch between a first diverter (7) and the supercooling pipe group (2), and a second end is connected to a pipe section at one side of a second diverter (8) of a main pipeline; the first one-way valve (4) is provided on the supercooling bypass pipe (3); the second one-way valve (5) is provided on a pipe section between the first diverter (7) of the parallel branch and the first end of the supercooling bypass pipe (3); and the third one-way valve (6) is provided on a pipe section between the second diverter (8) of the main pipeline and the second end of the supercooling bypass pipe (3). The advantageous effect of the present invention is that when the heat exchanger performs a heating operation, the one-way valves are used to divide the heat exchanger, which may reduce the degree of complexity of the system and reduce system pressure loss caused by the supercooling pipe group during heating, thereby improving the heat exchange efficiency of the system.

Description

Heat exchanger and air conditioner

This application is based on the Chinese patent application with the application number 201910023518.X and the application date is January 10, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

Technical field

The invention relates to the technical field of heat exchangers, in particular to a heat exchanger and an air conditioner.

Background technique

If the existing heat exchanger needs to be shunted, a shunt tube or a shunt is usually used for the shunt design, but the conventional shunt method has no direction distinction. It passes through the same pipeline during cooling operation and heating operation. When the device is in cooling operation, it meets the cooling operation requirements through the supercooling pipeline, while in the heating operation, it still passes through the supercooling pipeline, which will increase the pressure loss of the system and reduce the heat exchange efficiency of the system.

Summary of the invention

Embodiments of the present invention provide a heat exchanger and an air conditioner to solve the problem of reduced heat exchange efficiency during heating operation of the heat exchanger. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary section is not a general comment, nor is it to determine key/important constituent elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

According to a first aspect of embodiments of the present invention, a heat exchanger is provided.

In some optional embodiments, the above heat exchanger includes a heat exchange tube group;

The supercooled tube group is connected in parallel with the heat exchange tube group to the main pipe through the first shunt and the second shunt;

Supercooling bypass pipe, the first end of the supercooling bypass pipe is connected to the parallel branch between the first diverter and the supercooling pipe group, and the second end is connected to the pipe section on the side of the second diverter of the main pipe ;

The first one-way valve is disposed on the supercooling bypass pipe, and the conduction direction of the first one-way valve is limited to flow from the first end to the second end;

The second one-way valve is arranged on the pipe section between the first diverter of the parallel branch and the first end of the supercooling bypass pipe;

The third one-way valve is arranged on the pipe section between the second diverter of the main pipe and the second end of the supercooling bypass pipe.

Optionally, the heat exchange tube group includes one or more sub-tube groups, and the multiple sub-tube groups are connected in parallel with the supercooling tube group.

Optionally, the second end of the supercooling bypass pipe is connected to the third shunt on the pipe section on the second shunt side of the main pipe.

Optionally, the number of supercooling bypass tubes is multiple, and multiple supercooling bypass tubes are connected in parallel.

Optionally, one or more of the supercooling bypass pipes are connected in parallel with part of the pipe sections of the supercooling pipe group.

According to a second aspect of the embodiments of the present invention, an air conditioner is provided.

In some optional embodiments, the above air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor and a refrigerant circulation flow path formed by connecting four-way valves; wherein, the outdoor heat exchanger is any of the optional embodiments described above In the heat exchanger, one end of the main pipe where the third check valve of the heat exchanger is located is in communication with the indoor heat exchanger, and one end of the main pipe where the first diverter is located is in communication with the compressor.

According to a third aspect of the embodiments of the present invention, another air conditioner is further provided.

In some optional embodiments, the air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a refrigerant circulation flow path formed by connecting four-way valves; wherein, the indoor heat exchanger is any of the optional embodiments described above In the heat exchanger, one end of the main pipe where the third check valve of the heat exchanger is located is connected to the compressor, and one end of the main pipe where the first diverter is located is connected to the outdoor heat exchanger.

The technical solution provided by the embodiment of the present invention may include the following beneficial effects: when the heat exchanger is in heating operation, the heat exchanger is divided by a one-way valve, which can reduce the complexity of the system and reduce the overcooling during heating The pressure loss of the system caused by the pipe group improves the heat exchange efficiency of the system.

It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present invention.

BRIEF DESCRIPTION

The drawings here are incorporated into and constitute a part of this specification, show embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

Fig. 1 is a schematic structural diagram of a heat exchanger according to an exemplary embodiment.

detailed description

The following description and drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims, as well as all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, and do not require or imply any actual relationship or order between these elements. In fact the first element can also be called the second element and vice versa. Moreover, the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a structure, device, or device that includes a series of elements includes not only those elements, but also others that are not explicitly listed Elements, or include elements inherent to such structures, devices, or equipment. Without more restrictions, the element defined by the sentence "including one..." does not exclude that there are other identical elements in the structure, device or equipment that includes the element. The embodiments in this document are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other.

The terms "portrait", "landscape", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "herein" The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing this text and simplifying the description, and does not indicate or imply that the device or element referred to must It has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In the description herein, unless otherwise specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it may be a mechanical connection or an electrical connection, or it may be the communication between two elements, It may be directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific situations.

Herein, unless otherwise stated, the term "plurality" means two or more.

In this article, the character "/" indicates that the front and back objects are in an "or" relationship. For example, A/B means: A or B.

In this article, the term "and/or" refers to an association relationship describing an object, indicating that there may be three types of relationship. For example, A and/or B means: A or B, or A and B.

In some optional embodiments, a heat exchanger is provided including a heat exchange tube group 1, a supercooled tube group 2, a supercooled bypass tube 3, a first check valve 4, a second check valve 5, a first Three one-way valves 6, in which the supercooling tube group 2 and the heat exchange tube group 1 are connected in parallel to the main pipe through the first diverter 7 and the second diverter 8; the first end of the supercooling bypass tube 3 is connected to the first The parallel branch between the shunt 7 and the supercooling pipe group 2 has the second end connected to the pipe section on the side of the second shunt 8 of the main pipe; the first check valve 4 is provided on the subcooling bypass pipe 3 ; The second one-way valve 5 is provided on the pipe section between the first diverter 7 of the parallel branch and the first end of the supercooling bypass pipe 3; the third one-way valve 6 is provided on the second branch of the main pipe On the pipe section between the device 8 and the second end of the supercooling bypass pipe 3.

Optionally, the conduction direction through the first one-way valve 4 is defined as flowing from the first end to the second end.

Here, the supercooling bypass pipe 3 includes a first end and a second end, the first check valve 4 is disposed on the supercooling bypass pipe 3, the first check valve 4 may be a supercooling bypass valve, supercooling The first end of the bypass pipe 3 may be the end close to the first diverter 7, and the second end of the supercooling bypass pipe 3 may be the end close to the third check valve 6.

Optionally, the conduction direction of the supercooling check valve is defined as that the parallel node of the supercooling bypass pipe 3 and the supercooling pipe group 2 flows to the parallel node of the supercooling bypass pipe 3 and the main pipe.

Optionally, during the cooling operation of the heat exchanger, the refrigerant sequentially flows through the first flow divider 7, the heat exchange tube group 1, the second flow divider 8, the subcooling tube group 2, and the subcooling bypass tube 3. , The refrigerant does not pass through the second check valve 5 and the third check valve 6. The refrigerant enters from the first diverter 7 and passes through the parallel heat exchange tube group 1. Since the heat exchange tubes of the heat exchange tube group 1 are connected in parallel, in the case where the pressure difference of the fluid at both ends of the heat exchange tube group 1 is the same , Multiple parallel heat exchange tubes can shunt the incoming refrigerant, and can also increase the heat exchange surface area and improve the heat exchange efficiency; then, the refrigerant flows into the second diverter 8, due to the third unidirectional on the main road When the valve 6 is blocked, the refrigerant flows into the supercooling tube group 2 for further sufficient cooling. When passing through the parallel node of the supercooling tube group 2 and the subcooling bypass tube 3, due to the blocking of the second check valve 5, the refrigerant will The supercooling bypass pipe 3 flows into the main pipe through the first check valve 4 from the second end of the supercooling bypass pipe 3. In this process, the refrigerant passes through the longer sub-cooling tube group 2 to ensure the cooling effect and make the cooling effect better.

In this article, the first one-way valve 4, the second one-way valve 5 and the third one-way valve 6 are all one-way valves, that is, the refrigerant can only pass through the valve in one direction, when the pipeline where the one-way valve is located has a reverse direction The circulating refrigerant or other fluid, the one-way valve is equivalent to a closed valve, and cannot allow refrigerant or other fluid to pass through.

Optionally, the refrigerant provided by the present invention is not limited, and may be a refrigerant. During the cooling operation of the heat exchanger, the circulation path of the refrigerant is to sequentially flow through the first flow divider 7, the heat exchange tube group 1, and the second flow divider. 8. Supercooling tube group 2, supercooling bypass tube 3, at this time, the refrigerant does not pass the second check valve 5 and the third check valve 6. The refrigerant enters from the first diverter 7 and passes through the parallel heat exchange tube group 1. Since the heat exchange tubes of the heat exchange tube group 1 are connected in parallel, under the same pressure difference between the fluids at the two ends of the heat exchange tube group 1, Multiple parallel heat exchange tubes can shunt the incoming refrigerant, and can also increase the heat exchange surface area and improve the heat exchange efficiency; then, the refrigerant flows into the second shunt 8, due to the third check valve 6 on the main road Blocked, the refrigerant flows into the subcooling tube group 2 for further sufficient cooling. When passing through the parallel node of the subcooling tube group 2 and the subcooling bypass tube 3, due to the blocking of the second check valve 5, the refrigerant will flow into the subcooling bypass The pipe 3 flows into the main pipe from the second end of the supercooling bypass pipe 3 through the first check valve 4. In this process, when the refrigerant enters the first flow divider 7, it is a gaseous refrigerant. With the flow of the refrigerant, it passes through the heat exchange tube group 1, the refrigerant is cooled to gas-liquid mixing, and then passes through the supercooling tube group 2, fully condensed into a liquid state. During the cooling process, the refrigerant passes through the long sub-cooling tube group 2 to ensure the cooling effect and make the cooling effect better.

Optionally, when the heat exchanger is in heating operation, the refrigerant flows through the third one-way valve 6, the second flow divider 8, the parallel pipelines of the heat exchange tube group 1 and the subcooling tube group 2, and the first flow divider In the heating operation state, the refrigerant flow path is a three-way split flow. At this time, the heat exchange tube group 1 includes a first heat exchange pipe and a second heat exchange pipe.

In this article, the flow path from the third check valve 6 to the second flow divider 8 may be the main line, and the flow path from the second flow divider 8 to the first heat exchange line may be the first flow path, from the second flow divider 8 The flow path into the second heat exchange line may be the second flow path, and the flow path from the second flow divider 8 into the subcooling tube group 2 may be the third flow path.

Optionally, the refrigerant provided by the present invention is not limited, and may be a refrigerant. When the heat exchanger is in heating operation, the refrigerant flow path is three parallel flow paths. When the heat exchanger is in heating operation, it shunts through multiple paths, which relieves the greater resistance when the refrigerant enters the third check valve 6, reduces the resistance loss of the flow path, and improves the heating efficiency.

In this way, the heat exchanger is shunted by the one-way valve during the heating operation, which can reduce the complexity of the system and reduce the system pressure loss caused by the supercooling tube group 2 during heating , Thereby improving the heat exchange efficiency of the system.

Optionally, the heat exchange tube group 1 includes one or more sub-tube groups, and the multiple sub-tube groups are connected in parallel with the supercooling tube group 2.

Optionally, the heat exchange tube group 1 may be two first heat exchange pipes and a second heat exchange pipe connected in parallel, and the first heat exchange pipe and the second heat exchange pipe may be connected in parallel In the connection mode, under the condition that the flow pressure difference between the two ends of the heat exchange tube group 1 is constant, the refrigerant entering the first flow divider 7 can be better divided.

Optionally, the second end of the supercooling bypass pipe 3 is connected to the third shunt 99 on the pipe section on the second shunt 8 side of the main pipe.

Optionally, during the cooling operation of the heat exchanger, the refrigerant sequentially flows through the first flow divider 7, the heat exchange tube group 1, the second flow divider 8, the subcooling tube group 2, and the subcooling bypass tube 3. , The refrigerant does not pass through the second check valve 5 and the third check valve 6. The refrigerant enters from the first diverter 7 and passes through the parallel heat exchange tube group 1. Since the heat exchange tubes of the heat exchange tube group 1 are connected in parallel, in the case where the pressure difference of the fluid at both ends of the heat exchange tube group 1 is the same , Multiple parallel heat exchange tubes can shunt the incoming refrigerant, and can also increase the heat exchange surface area and improve the heat exchange efficiency; then, the refrigerant flows into the second diverter 8, due to the third unidirectional on the main road When the valve 6 is blocked, the refrigerant flows into the supercooling tube group 2 for further sufficient cooling. When passing through the parallel node of the supercooling tube group 2 and the subcooling bypass tube 3, due to the blocking of the second check valve 5, the refrigerant will The supercooling bypass pipe 3 flows into the third diverter 99 from the second end of the supercooling bypass pipe 3 through the first check valve 4. In this process, the refrigerant passes through the longer sub-cooling tube group 2 to ensure the cooling effect and make the cooling effect better.

Optionally, the refrigerant provided by the present invention is not limited, and may be a refrigerant. During the cooling operation of the heat exchanger, the circulation path of the refrigerant is to sequentially flow through the first flow divider 7, the heat exchange tube group 1, and the second flow divider. 8. Supercooling tube group 2, supercooling bypass tube 3, at this time, the refrigerant does not pass the second check valve 5 and the third check valve 6. The refrigerant enters from the first diverter 7 and passes through the parallel heat exchange tube group 1. Since the heat exchange tubes of the heat exchange tube group 1 are connected in parallel, under the same pressure difference between the fluids at the two ends of the heat exchange tube group 1, Multiple parallel heat exchange tubes can shunt the incoming refrigerant, and can also increase the heat exchange surface area and improve the heat exchange efficiency; then, the refrigerant flows into the second shunt 8, due to the third check valve 6 on the main road Blocked, the refrigerant flows into the subcooling tube group 2 for further sufficient cooling. When passing through the parallel node of the subcooling tube group 2 and the subcooling bypass tube 3, due to the blocking of the second check valve 5, the refrigerant will flow into the subcooling bypass The pipe 3 flows into the third flow divider 99 from the second end of the supercooling bypass pipe 3 through the first check valve 4. In this process, when the refrigerant enters the first flow divider 7, it is a gaseous refrigerant. With the flow of the refrigerant, it passes through the heat exchange tube group 1, the refrigerant is cooled to gas-liquid mixing, and then passes through the supercooling tube group 2, fully condensed into a liquid state. During the cooling process, the refrigerant passes through the long sub-cooling tube group 2 to ensure the cooling effect and make the cooling effect better.

Optionally, during the heating operation of the heat exchanger, the refrigerant sequentially flows through the third diverter 99, the third check valve 6, the second diverter 8, the parallel connection of the heat exchange tube group 1 and the subcooling tube group 2 The pipeline, the first flow divider 7, in the heating operation state, the flow path of the refrigerant is a three-way flow divider. At this time, the heat exchange tube group 1 includes a first heat exchange pipeline and a second heat exchange pipeline.

In this article, the flow path from the third flow divider 9 to the second flow divider 8 through the third check valve 6 may be the main line, and the flow path from the second flow divider 8 to the first heat exchange line may be the first The first flow path, the flow path from the second flow divider 8 into the second heat exchange line may be the second flow path, and the flow path from the second flow divider 8 into the supercooling tube group 2 may be the third flow path.

Optionally, the number of the subcooling bypass tubes 3 is plural, and the plurality of subcooling bypass tubes 3 are connected in parallel.

Alternatively, the supercooling bypass pipe 3 may be two first supercooling bypass pipes 3 and a second supercooling bypass pipe 3 connected in parallel, the first supercooling bypass pipe 3 and the second supercooling The bypass pipe 3 may be connected in parallel. Under the condition that the flow pressure difference between the two ends of the subcooling bypass pipe 3 is unchanged, the refrigerant entering the first diverter 7 may be better diverted.

Optionally, one or more of the subcooling bypass tubes 3 are connected in parallel with part of the tube sections of the subcooling tube group 2.

Alternatively, the supercooling bypass pipe 3 may be two first supercooling bypass pipes 3 and a second supercooling bypass pipe 3 connected in parallel, the first supercooling bypass pipe 3 and the second supercooling The bypass pipe 3 can be connected in parallel and connected in parallel with part of the pipe sections of the supercooled pipe group 2. When the flow pressure difference between the subcooled bypass pipe 3 and the part of the pipe section of the supercooled pipe group 2 is constant, it can be The refrigerant entering the first flow divider 7 has a better flow dividing effect.

An embodiment of the present invention further provides an air conditioner, including an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a refrigerant circulation flow path connected by a four-way valve; wherein, the outdoor heat exchanger is any optional implementation as described above In the heat exchanger described in the example, the heat exchange tube group 1 of the heat exchanger communicates with the compressor, and the subcooling tube group 2 communicates with the indoor heat exchanger.

Optionally, the outdoor heat exchanger of the air conditioner is installed in the outdoor unit of the air conditioner, and the volume of the outdoor unit of the air conditioner is more unrestricted. When the outdoor heat exchanger is the outdoor heat exchanger as described in any of the optional embodiments above, the supercooled side A plurality of subcooling bypass tubes 3 connected in parallel in the group of 3 pass tubes can occupy a larger space, and the heat exchange efficiency of the air conditioner is also higher.

Optionally, when the air conditioner is performing cooling operation, the outdoor heat exchanger includes a heat exchange tube group 1, a subcooling tube group 2, a subcooling bypass tube 3, a first check valve 4, a second check valve 5, The third one-way valve 6, in which the supercooled tube group 2 and the heat exchange tube group 1 are connected in parallel to the main pipe through the first diverter 7 and the second diverter 8; the first end of the supercooled bypass tube 3 is connected to the A parallel branch between the flow divider 7 and the supercooling pipe group 2 is connected to the second end of the main flow line on the side of the second flow divider 8 side; the first check valve 4 is provided in the supercooling bypass pipe 3 The second one-way valve 5 is arranged on the pipe section between the first diverter 7 of the parallel branch and the first end of the supercooling bypass pipe 3; the third one-way valve 6 is arranged on the second of the main pipe On the pipe section between the diverter 8 and the second end of the supercooling bypass pipe 3.

Optionally, during the cooling operation of the heat exchanger, the refrigerant flows through the first shunt 7, the heat exchange tube group 1, the second shunt 8, the subcooled tube group 2, and the subcooled bypass tube 3 at this time. The refrigerant does not pass through the second check valve 5 and the third check valve 6. The refrigerant enters from the first diverter 7 and passes through the parallel heat exchange tube group 1. Since the heat exchange tubes of the heat exchange tube group 1 are connected in parallel, under the same pressure difference between the fluids at the two ends of the heat exchange tube group 1, Multiple parallel heat exchange tubes can shunt the incoming refrigerant, and can also increase the heat exchange surface area and improve the heat exchange efficiency; then, the refrigerant flows into the second shunt 8, due to the third check valve 6 on the main road Blocked, the refrigerant flows into the subcooling tube group 2 for further sufficient cooling. When passing through the parallel node of the subcooling tube group 2 and the subcooling bypass tube 3, due to the blocking of the second check valve 5, the refrigerant will flow into the subcooling bypass The pipe 3 flows into the main pipe from the second end of the supercooling bypass pipe 3 through the first check valve 4. In this process, the refrigerant passes through the long supercooling tube group 2, so that the refrigerant is recooled when passing through the supercooling tube group 2, so that the refrigerant can be fully cooled, so that it does not evaporate too quickly, thereby improving the air conditioning unit. The cooling effect of the machine system.

Optionally, when the air conditioner is performing cooling operation, the flow path of the refrigerant in the outdoor heat exchanger is a path, which sequentially flows through the first splitter 7, the heat exchange tube group 1, the second splitter 8, and the supercooling tube group 2. The supercooling bypass pipe 3, at this time, the refrigerant does not pass through the second check valve 5 and the third check valve 6. The refrigerant enters from the first splitter 7 and passes through the parallel heat exchange tube group 1. Since the heat exchange tubes of the heat exchange tube group 1 are connected in parallel, under the same pressure difference between the fluids of the heat exchange tube group 1, Multiple parallel heat exchange tubes can shunt the incoming refrigerant, and can also increase the heat exchange surface area and improve the heat exchange efficiency; then, the refrigerant flows into the second shunt 8, due to the third check valve 6 on the main road Blocked, the refrigerant flows into the subcooling tube group 2 for further sufficient cooling. When passing through the parallel node of the subcooling tube group 2 and the subcooling bypass tube 3, due to the blocking of the second check valve 5, the refrigerant will flow into the subcooling bypass The pipe 3 flows into the main pipe from the second end of the supercooling bypass pipe 3 through the first check valve 4. In this process, the refrigerant is gaseous refrigerant when it enters the first splitter 7. With the flow of the refrigerant, it passes through the heat exchange tube group 1. The state of the refrigerant gradually passes through the gas-liquid mixing, passes through the supercooling bypass pipe 3, and then The refrigerant flowing out of the cold bypass pipe 3 is guaranteed to be fully condensed into a liquid state. In order to make the condensation process fully proceed, it is necessary to pass a long sub-cooled pipe group 2 to ensure the cooling effect. The outdoor heat exchanger and sub-cooled pipe group 2 are added Compared with the outdoor heat exchanger that only passes through the heat exchange tube group 1, the cooling effect is better, the cooling effect is better, the heat exchange efficiency is guaranteed, and the cooling work efficiency of the entire air conditioner system is also improved.

Optionally, during the heating operation of the air conditioner, the refrigerant in the outdoor heat exchanger flows through the third check valve 6, the second diverter 8, the parallel pipelines of the heat exchange tube group 1 and the subcooling tube group 2 in sequence , The first flow divider 7, in the heating operation state, the flow path of the refrigerant is three-way flow, when the refrigerant in the gas-liquid mixed state enters from the second flow divider 8, if there is no heat exchange tube group 1 and supercooling tube The parallel passage formed by the group 2 is cooled, but passes through the supercooling tube group 2 and the heat exchange tube group 1 connected in series in sequence. The refrigerant resistance is large, which will reduce the heat exchange efficiency and affect the heating effect of the air conditioner.

Optionally, when the air conditioner is performing heating operation, the flow path of the refrigerant in the outdoor heat exchanger is multiple paths, and when the heat exchanger is operating during heating, the flow is diverted through multiple paths to relieve the refrigerant from entering the third check valve The larger resistance at 6 o'clock reduces the resistance loss of the flow path and improves the heating efficiency. During the heating operation of the outdoor heat exchanger, the multi-path diversion reduces the greater resistance when the refrigerant enters the third check valve 6, reduces the resistance loss of the flow path, and improves the heating efficiency of the air conditioner.

Optionally, the heat exchange tube group 1 may be two first heat exchange pipes and a second heat exchange pipe connected in parallel, and the first heat exchange pipe and the second heat exchange pipe may be connected in parallel In the connection mode, under the condition that the flow pressure difference between the two ends of the heat exchange tube group 1 is unchanged, the refrigerant entering the first flow divider 7 can be better divided.

In this way, when the air conditioner is heating, the one-way valve is used to divide the outdoor heat exchanger, which can reduce the complexity of the system and reduce the system pressure loss caused by the supercooling tube group 2 during heating, thereby improving the system. Heat exchange efficiency.

An embodiment of the present invention further provides another air conditioner, including an indoor heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve connected to form a refrigerant circulation flow path; wherein, the indoor heat exchanger is any optional as described above In the heat exchanger described in the embodiment, the heat exchange tube group 1 of the heat exchanger communicates with the compressor, and the subcooling tube group 2 communicates with the indoor heat exchanger.

Optionally, the air conditioner may further include a throttling device, which is not limited, the throttling device may be a capillary tube, the compressor of the air conditioner may be a fixed frequency compressor, and the capillary tube may be connected in parallel to the supercooling tube group 2 and the supercooling bypass tube 3 The end of the node away from the heat exchange tube group 1.

Optionally, the air conditioner may further include a throttling device, which is not limited, the throttling device may be an electronic expansion valve, the compressor of the air conditioner may be an inverter compressor, and the electronic expansion valve may be connected to the subcooling tube group 2 and the subcooling bypass The end of the parallel node of the tube 3 away from the heat exchange tube group 1.

Optionally, the throttling device may be provided at the end of the parallel node of the supercooling tube group 2 and the supercooling bypass tube 3 away from the heat exchange tube group 1, and connected to the supercooling tube group 2, the supercooling tube group 2 makes the refrigerant again For cooling, there is enough supercooling degree to control the refrigerant not to evaporate too fast before the throttling components, thereby improving the cooling efficiency of the air conditioner.

Optionally, when the air conditioner is performing cooling operation, the flow path of the refrigerant in the outdoor heat exchanger is a path, which sequentially flows through the first splitter 7, the heat exchange tube group 1, the second splitter 8, and the supercooling tube group 2. The supercooling bypass pipe 3, at this time, the refrigerant does not pass through the second check valve 5 and the third check valve 6. The refrigerant enters from the first diverter 7 and passes through the parallel heat exchange tube group 1. Since the heat exchange tubes of the heat exchange tube group 1 are connected in parallel, under the same pressure difference between the fluids at the two ends of the heat exchange tube group 1, Multiple parallel heat exchange tubes can shunt the incoming refrigerant, and can also increase the heat exchange surface area and improve the heat exchange efficiency; then, the refrigerant flows into the second shunt 8, due to the third check valve 6 on the main road Blocked, the refrigerant flows into the subcooling tube group 2 for further sufficient cooling. When passing through the parallel node of the subcooling tube group 2 and the subcooling bypass tube 3, due to the blocking of the second check valve 5, the refrigerant will flow into the subcooling bypass The pipe 3 flows into the main pipe from the second end of the supercooling bypass pipe 3 through the first check valve 4. In this process, the refrigerant is gaseous refrigerant when it enters the first splitter 7. With the flow of the refrigerant, it passes through the heat exchange tube group 1. The state of the refrigerant gradually passes through the gas-liquid mixing, passes through the subcooling bypass pipe 3, and then The refrigerant flowing out of the cold bypass tube 3 is guaranteed to be fully condensed into a liquid state. In order to make the condensation process fully proceed, it is necessary to pass a long subcooled tube group 2 to ensure the cooling effect. The outdoor heat exchanger and subcooled tube group 2 are added Compared with the outdoor heat exchanger that only passes through the heat exchange tube group 1, the cooling effect is better, the cooling effect is better, the heat exchange efficiency is guaranteed, and the cooling work efficiency of the entire air conditioner system is also improved.

In this way, when the air conditioner is heating, the check valve is used to shunt the indoor heat exchanger, which can reduce the complexity of the system and reduce the system pressure loss caused by the supercooling tube group 2 during heating, thereby improving the system. Heat exchange efficiency.

The present invention is not limited to the structure that has been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is only limited by the appended claims.

Claims

A heat exchanger, characterized in that the heat exchanger includes:

Heat exchange tube group;

The supercooled tube group is connected in parallel with the heat exchange tube group to the main pipe through the first shunt and the second shunt;

A supercooling bypass pipe, the first end of the supercooling bypass pipe is connected to the parallel branch between the first shunt and the supercooling pipe group, and the second end is connected to the first branch of the main pipe On the pipe section on the side of the second shunt;

A first one-way valve is provided on the supercooling bypass pipe, and the conduction direction of the over-first one-way valve is defined as flowing from the first end to the second end;

A second one-way valve arranged on the pipe section between the first diverter of the parallel branch and the first end of the supercooling bypass pipe;

A third one-way valve is provided on the pipe section between the second diverter of the main pipe and the second end of the supercooling bypass pipe.
The heat exchanger according to claim 1, wherein the heat exchange tube group includes one or more sub tube groups, and the plurality of sub tube groups are connected in parallel with the supercooling tube group.
The heat exchanger according to claim 1, wherein the second end of the supercooling bypass pipe is connected to the third branch on the pipe section on the side of the second diverter of the main pipe Device.
The heat exchanger according to claim 1, wherein the number of the supercooling bypass pipes is plural, and a plurality of the supercooling bypass pipes are connected in parallel.
The heat exchanger according to claim 4, characterized in that one or more of the supercooling bypass tubes are connected in parallel with part of the tube sections of the supercooling tube group.
An air conditioner, characterized in that the air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve connected refrigerant circulation flow path; wherein, the outdoor heat exchanger is as claimed The heat exchanger according to any one of 1-5, one end of the main pipe where the third check valve of the heat exchanger is connected to the indoor heat exchanger, and the first diverter is located One end of the main pipe is connected to the compressor.
An air conditioner, characterized in that the air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve connected refrigerant circulation flow path; wherein, the indoor heat exchanger is as claimed The heat exchanger according to any one of 1-5, one end of the main pipe where the third check valve of the heat exchanger is located communicates with the compressor, and the main pipe where the first diverter is located One end of the road communicates with the outdoor heat exchanger.