Heat exchanger, outdoor unit and air conditioner

Abstract

The utility model discloses a heat exchanger, an outdoor unit and an air conditioner, and relates to the technical field of air conditioners, a first heat exchange part in the heat exchanger comprises a first leeward heat exchange tube and a first windward heat exchange tube which are connected in series, and a second heat exchange part comprises a second leeward heat exchange tube and a second windward heat exchange tube which are connected in series; a communicating part between the first leeward heat exchange pipe and the second leeward heat exchange pipe, the first windward heat exchange pipe, the second leeward heat exchange pipe, the first refrigerant end and the second refrigerant end are all connected with the flow direction adjusting assembly; the flow direction adjusting assembly is arranged to adjust a refrigerant to sequentially flow through the second leeward heat exchange pipe, the second windward heat exchange pipe, the first leeward heat exchange pipe and the second leeward heat exchange pipe when the refrigerant flows from the first refrigerant end to the second refrigerant end. And a refrigerant flows to the first refrigerant end from the second refrigerant end, and flows into the corresponding heat exchange parts for heat exchange from the first leeward heat exchange pipe and the second windward heat exchange pipe. The heat exchange effect of the heat exchanger during refrigeration and heating of the air conditioner is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a heat exchanger, an outdoor unit, and an air conditioner. Background Technology

[0002] During the operation of the refrigerant system of an air conditioner, the heat exchanger is in a heat exchange state, and the air in the environment can flow through the heat exchanger for heat exchange under the drive of the corresponding fan.

[0003] In related technologies, heat exchangers typically include a switching component and a manifold. During cooling, when the heat exchanger is in a condensing state, the switching component adjusts the refrigerant flow from the heat exchange section into the manifold for further heat exchange. During heating, when the heat exchanger is in an evaporating state, the switching component adjusts the refrigerant flow to both the heat exchange section and the manifold for separate heat exchange. However, this approach results in some refrigerant flow during cooling (refrigerant flows in from the windward side and out from the leeward side) and some during heating (refrigerant flows in from the leeward side and out from the windward side), while during heating, there may be either entirely counter-current or entirely co-current heat exchange. This leads to poor heat exchange efficiency during both cooling and heating. Utility Model Content

[0004] The main purpose of this utility model is to propose a heat exchanger, an outdoor unit, and an air conditioner, which aims to improve the heat exchange effect of the heat exchanger during air conditioning cooling and heating.

[0005] To achieve the above objectives, this utility model proposes a heat exchanger, the heat exchanger comprising:

[0006] First refrigerant end and second refrigerant end;

[0007] The first heat exchange section includes a first leeward heat exchange tube and a first frontal heat exchange tube connected in series.

[0008] The second heat exchange section includes a second leeward heat exchange tube and a second forward heat exchange tube connected in series, the second forward heat exchange tube being connected to the first leeward heat exchange tube; and...

[0009] The flow direction adjustment component is connected to the connecting portion between the first leeward heat exchange pipe and the second windward heat exchange pipe, the first windward heat exchange pipe, the second leeward heat exchange pipe, the first refrigerant end, and the second refrigerant end. The flow direction adjustment component is configured to adjust the refrigerant to flow sequentially through the second leeward heat exchange pipe, the second windward heat exchange pipe, the first leeward heat exchange pipe, and the first leeward heat exchange pipe when the refrigerant flows from the second refrigerant end to the second refrigerant end. The flow direction adjustment component is also configured to adjust the refrigerant to flow into the corresponding heat exchange section from the first leeward heat exchange pipe and the second windward heat exchange pipe respectively when the refrigerant flows from the second refrigerant end to the first refrigerant end.

[0010] In one embodiment, the flow direction adjustment component includes:

[0011] The first regulating component is configured to block the connection between the first refrigerant end and the first airflow heat exchanger when the refrigerant flows from the first refrigerant end to the second refrigerant end, and to connect the first refrigerant end to the first airflow heat exchanger when the refrigerant flows from the second refrigerant end to the first refrigerant end;

[0012] The second regulating component is connected to the connecting part, the second refrigerant end, and the first air-facing heat exchange pipe. The second regulating component is configured to switch between a first state and a second state. In the first state, when the refrigerant flows from the first refrigerant end to the second refrigerant end, the first air-facing heat exchange pipe is connected to the second refrigerant end. In the second state, when the refrigerant flows from the second refrigerant end to the first refrigerant end, the connecting part is connected to the second refrigerant end.

[0013] In one embodiment, the first regulating component includes a first one-way valve, which is configured to allow one-way flow from the first air-facing heat exchange tube to the first pipeline.

[0014] In one embodiment, the second adjustment component includes:

[0015] The second one-way valve is configured to allow unidirectional flow from the second refrigerant end to the connecting part. The second one-way valve is connected to both ends of the second one-way valve, and the second one-way valve is configured to allow unidirectional flow from the second refrigerant end to the connecting part.

[0016] The third one-way valve is connected to both ends of the second refrigerant end and the first air-facing heat exchange pipe, respectively. The third one-way valve is configured to allow one-way flow from the first air-facing heat exchange pipe to the second refrigerant end.

[0017] In one embodiment, the first heat exchange section includes at least two first tube groups connected in parallel, each first tube group including a first leeward heat exchange tube and a first frontal heat exchange tube connected in series.

[0018] In one embodiment, the second heat exchange section includes at least two parallel second tube groups, each second tube group including a second leeward heat exchange tube and a second frontal heat exchange tube connected in series.

[0019] In one embodiment, the first heat exchange section is disposed above the second heat exchange section.

[0020] In one embodiment, the second heat exchange section is disposed above the first heat exchange section.

[0021] This utility model also proposes an outdoor unit, which includes an outdoor fan, a throttling device, a reversing assembly, a compressor, and a heat exchanger as described in any of the above. The first refrigerant end, the exhaust port of the compressor, and the return port of the compressor are all connected to the reversing assembly, and the second refrigerant end is connected to the throttling device.

[0022] The first windward heat exchange pipe and the first leeward heat exchange pipe are arranged sequentially along the airflow direction driven by the outdoor fan.

[0023] The second windward heat exchange pipe and the second leeward heat exchange pipe are arranged sequentially along the airflow direction driven by the outdoor fan.

[0024] This utility model also proposes an air conditioner, which includes an outdoor unit and an indoor heat exchange device as described above. The indoor heat exchange device is connected to the reversing assembly, and the indoor heat exchange device, the throttling device, and the heat exchanger are connected in sequence.

[0025] The technical solution of this utility model is based on the connection between the leeward side of the first heat exchange section and the windward side of the second heat exchange section in the heat exchanger. The connecting part, the windward and leeward sides of the different heat exchange sections, and the first and second refrigerant ends are connected by a flow direction adjustment component. When the refrigerant flows from the first refrigerant end to the second refrigerant end, the refrigerant first flows into the second heat exchange section for heat exchange and then flows into the second heat exchange section for subcooling. During this process, the refrigerant flows from the leeward side to the windward side. This can realize that when the air conditioner where the heat exchanger is located is in cooling operation, and when the refrigerant flows in from the first refrigerant end, the first and second heat exchange sections can be in a counter-current state in the heat exchanger when the heat exchanger is in a condensing state. In a hot state, this is beneficial for improving the condensation efficiency of the heat exchanger. When the refrigerant flows from the second refrigerant end to the first refrigerant end, the refrigerant flows into the first and second heat exchange sections respectively for heat exchange. During this process, the refrigerant in the first heat exchange section flows in from the leeward side, while the refrigerant in the second heat exchange section flows in from the windward side. This allows the air conditioner where the heat exchanger is located to operate in heating mode, and when the refrigerant flows in from the second refrigerant end, the first and second heat exchange sections can be in counter-current and co-current heat exchange states respectively during the evaporation state. This is beneficial for improving the evaporation heat exchange efficiency of the heat exchanger and avoiding excessively low refrigerant temperature at the outlet of the heat exchanger, thus reducing the risk of frosting. Based on this, the heat exchange effect of the heat exchanger during air conditioning cooling and heating can be improved. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a heat exchanger embodiment provided by this utility model;

[0028] Figure 2 A schematic diagram of another embodiment of the heat exchanger provided by this utility model;

[0029] Figure 3 A schematic diagram of the refrigerant system structure of an embodiment of the air conditioner provided by this utility model.

[0030] Explanation of icon numbers:

[0031] label name label name 100 Outdoor unit 14 Flow direction adjustment component 1 heat exchanger 141 First adjustment component 101 First refrigerant end 142 Second adjustment component 102 Second refrigerant end 1421 Second check valve 11 First heat exchange section 1422 Third check valve 11a First Pipe Group 15 First pipeline 111 First leeward heat exchanger pipe 2 commutation components 112 First air-facing heat exchanger pipe 3 Throttling device 12 Second heat exchange section 4 compressor 12a Second group 5 Indoor heat exchanger 121 Second back-wind heat exchanger pipe 6 Indoor fan 122 Second air-facing heat exchanger pipe 7 outdoor fan 13 Connecting parts

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] This utility model proposes a heat exchanger 1.

[0037] In this embodiment, heat exchanger 1 is an outdoor heat exchanger, located in the outdoor environment. In some other embodiments, heat exchanger 1 is also an indoor heat exchanger.

[0038] Reference Figure 1 and Figure 2 The heat exchanger 1 includes a first refrigerant end 101, a second refrigerant end 102, a first heat exchange section 11, a second heat exchange section 12, and a flow direction adjustment component 14.

[0039] The first heat exchange section 11 includes a first leeward heat exchange tube 111 and a first windward heat exchange tube 112 connected in series. The second heat exchange section 12 includes a second leeward heat exchange tube 121 and a second windward heat exchange tube 122 connected in series. The second windward heat exchange tube 122 is connected to the first leeward heat exchange tube 111.

[0040] The connecting portion 13 between the first leeward heat exchange pipe 111 and the second windward heat exchange pipe 122, the first windward heat exchange pipe 112, the second leeward heat exchange pipe 121, the first refrigerant end 101, and the second refrigerant end 102 are all connected to the flow direction adjustment component 14. The flow direction adjustment component 14 is configured to adjust the refrigerant flow sequentially through the second leeward heat exchange pipe 121, the second windward heat exchange pipe 122, the first leeward heat exchange pipe 111, and the first leeward heat exchange pipe 111 when the refrigerant flows from the second refrigerant end 101 to the first refrigerant end 101. The flow direction adjustment component 14 is also configured to adjust the refrigerant flow from the first leeward heat exchange pipe 111 and the second windward heat exchange pipe 122 into the corresponding heat exchange sections for heat exchange when the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101.

[0041] The first leeward heat exchanger tube 111 is a heat exchanger tube installed on the leeward side of the first heat exchanger 1, and the first windward heat exchanger tube 112 is a heat exchanger tube installed on the windward side of the first heat exchanger 1. The second leeward heat exchanger tube 121 is a heat exchanger tube installed on the leeward side of the second heat exchanger 1, and the second windward heat exchanger tube 122 is a heat exchanger tube installed on the windward side of the second heat exchanger 1. Here, the leeward side and the windward side are defined as follows: the upstream direction of the airflow driven by the fan corresponding to the heat exchanger 1 is the windward side, and the downstream direction of the airflow driven by the fan corresponding to the heat exchanger 1 is the leeward side.

[0042] In this embodiment, the first heat exchange section 11 includes more than one first leeward heat exchange pipe 111 and a corresponding first windward heat exchange pipe 112 connected in series, and the second heat exchange section 12 includes more than one second leeward heat exchange pipe 121 and a corresponding second windward heat exchange pipe 122 connected in series. In some other embodiments, the first heat exchange section 11 may also include a first leeward heat exchange pipe 111 and a corresponding first windward heat exchange pipe 112 connected in series, and / or, the second heat exchange section 12 may include a second leeward heat exchange pipe 121 and a corresponding second windward heat exchange pipe 122 connected in series.

[0043] The first leeward heat exchanger tube 111 and the first windward heat exchanger tube 112 can be connected in series via a first intermediate heat exchanger tube. The first leeward heat exchanger tube 111, the first intermediate heat exchanger tube, and the first windward heat exchanger tube 112 can be arranged sequentially. Alternatively, the first leeward heat exchanger tube 111 and the first windward heat exchanger tube 112 can be directly connected in series.

[0044] The second leeward heat exchanger tube 121 and the second forward heat exchanger tube 122 can be connected in series via a second intermediate heat exchanger tube. The second leeward heat exchanger tube 121, the second intermediate heat exchanger tube, and the second forward heat exchanger tube 122 can be arranged sequentially. Alternatively, the second leeward heat exchanger tube 121 and the second forward heat exchanger tube 122 can be directly connected in series.

[0045] The first leeward heat exchanger tube 111, the first windward heat exchanger tube 112, the second leeward heat exchanger tube 121, and the second windward heat exchanger tube 122 can be straight tubes or coils.

[0046] The first refrigerant terminal 101 and the second refrigerant terminal 102 are configured to be connected to different locations in the refrigerant system of the air conditioner. The first refrigerant terminal 101 and the second refrigerant terminal 102 are respectively the refrigerant inlet and refrigerant outlet of the heat exchanger 1. When the refrigerant flows from the first refrigerant terminal 101 to the second refrigerant terminal 102, the heat exchanger 1 is in a condensing state; when the refrigerant flows from the second refrigerant terminal 102 to the first refrigerant terminal 101, the heat exchanger 1 is in an evaporating state.

[0047] In this embodiment, the first refrigerant end 101 is configured to be connected to the reversing assembly 2 (e.g., a four-way valve) in the air conditioner, and the second refrigerant end 102 is configured to be connected to the throttling device 3 (e.g., an electronic expansion valve) in the air conditioner. The reversing assembly 2 can switch the refrigerant flow direction in the air conditioner. When the reversing assembly 2 is in the first operating state, the exhaust port of the compressor 4 is connected to the first refrigerant end 101 of the heat exchanger 1, and the refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, and the heat exchanger 1 is in the condensation state. When the reversing assembly 2 is in the second operating state, the return port of the compressor 4 is connected to the first refrigerant end 101 of the heat exchanger 1, and the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101, and the heat exchanger 1 is in the evaporation state.

[0048] In this embodiment, the connecting part 13 includes a distributor, and at least one first leeward heat exchange pipe 111 and at least one second windward heat exchange pipe 122 are both connected to the manifold in the distributor.

[0049] The flow direction regulating assembly 14 can be a single integrated component or composed of more than one separate component. The flow direction regulating assembly 14 may include a combination of more than one check valve, or a combination of more than one solenoid valve, or a combination of a check valve and a solenoid valve, or a multi-way regulating assembly, or a combination of a multi-way valve and a solenoid valve, or a combination of a multi-way valve and a check valve, etc. The specific form of the flow direction regulating assembly 14 is not specifically limited; all regulating assemblies capable of achieving the same state regulation function are within the protection scope of the flow direction regulating assembly 14.

[0050] Reference Figure 1 (a) and Figure 2 (a) The arrow in the figure shows the direction of refrigerant flow. When the refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, the heat exchanger 1 is in a condensing state. The refrigerant flowing in from the first refrigerant end 101 flows through the second leeward heat exchange pipe 121, the second windward heat exchange pipe 122, the first leeward heat exchange pipe 111 and the first leeward heat exchange pipe 111 and then flows out from the second refrigerant end 102. The direction of refrigerant in the first heat exchange section 11 and the second heat exchanger 1 is opposite to the direction of airflow driven by the fan corresponding to the heat exchanger 1, that is, they are both in a counter-current heat exchange state.

[0051] Reference Figure 1 (b) and Figure 2(b) The arrows in the diagram indicate the refrigerant flow direction. When the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101, the heat exchanger 1 is in an evaporation state. The refrigerant flowing into the second refrigerant end 102 can be divided into two parts. One part of the refrigerant flows through the first leeward heat exchange pipe 111 and the first windward heat exchange pipe 112 in sequence for heat exchange and then flows out of the heat exchanger 1 from the first refrigerant end 101. The other part of the refrigerant flows through the second windward heat exchange pipe 122 and the second leeward heat exchange pipe 121 in sequence for heat exchange and then flows out of the heat exchanger 1 from the first refrigerant end 101. The direction of refrigerant in the first heat exchange section 11 is opposite to the direction of airflow driven by the fan corresponding to the heat exchanger 1, and it is in a counter-current heat exchange state. The direction of refrigerant in the second heat exchange section 12 is the same as the direction of airflow driven by the fan corresponding to the heat exchanger 1, and it is in a water flow heat exchange state.

[0052] The technical solution of this utility model, based on the connection between the leeward side of the first heat exchange section 11 and the windward side of the second heat exchange section 12 in the heat exchanger 1, connects the connecting part 13, the windward and leeward sides of the different heat exchange sections, and the first refrigerant end 101 and the second refrigerant end 102 through the flow direction adjustment component 14. When the refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, the refrigerant first flows into the second heat exchange section 12 for heat exchange and then flows into the second heat exchange section 12 for subcooling. During this process, the refrigerant flows from the leeward side to the windward side, which can realize that the air conditioner where the heat exchanger 1 is located can operate in cooling mode, and when the refrigerant flows in from the first refrigerant end 101, both the first heat exchange section 11 and the second heat exchange section 12 can operate in the condensation state. In a counter-current heat exchange state, the condensation efficiency of heat exchanger 1 is improved. When the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101, the refrigerant flows into the first heat exchange section 11 and the second heat exchange section 12 respectively for heat exchange. During this process, the refrigerant in the first heat exchange section 11 flows in from the leeward side, while the refrigerant in the second heat exchange section 12 flows in from the windward side. This allows the first heat exchange section 11 and the second heat exchange section 12 to be in a counter-current heat exchange state and a co-current heat exchange state respectively when the air conditioner containing heat exchanger 1 is in heating operation and the refrigerant flows in from the second refrigerant end 102. This improves the evaporative heat exchange efficiency of heat exchanger 1 and avoids the refrigerant temperature from flowing out of heat exchanger 1 being too low, reducing the risk of frosting. Based on this, the heat exchange effect of heat exchanger 1 during air conditioning cooling and heating can be improved.

[0053] In one feasible implementation, refer to Figure 1 and Figure 2 The flow direction adjustment component 14 includes:

[0054] The first regulating component 141 is connected to the first refrigerant end 101 via the second leeward heat exchange pipe 121. The first pipe 15 between the first refrigerant end 101 and the second leeward heat exchange pipe 121, and the first windward heat exchange pipe 112 are both connected to the first regulating component 141. The first regulating component 141 is configured to block the connection between the first refrigerant end 101 and the first windward heat exchange pipe 112 when the refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, and to connect the first refrigerant end 101 and the first windward heat exchange pipe 112 when the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101.

[0055] The second regulating component 142 is connected to the connecting part 13, the second refrigerant end 102, and the first air-facing heat exchange pipe 112. The second regulating component 142 is configured to switch between a first state and a second state. In the first state, when the refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, the first air-facing heat exchange pipe 112 and the second refrigerant end 102 are connected. In the second state, when the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101, the connecting part 13 and the second refrigerant end 102 are connected.

[0056] In the first state, the connecting part 13 is blocked from the second refrigerant end 102, and in the second state, the second refrigerant end 102 is blocked from the first air-facing heat exchange pipe 112.

[0057] Under the regulation of the first regulating component 141, when the refrigerant flows in from the first refrigerant end 101, it will not flow through the branch where the first regulating component 141 is located to enter the first heat exchange section 11, but will flow into the second leeward heat exchange tube 121 for heat exchange; when the refrigerant flows in from the second refrigerant end 102, a portion of the refrigerant will flow through the first leeward heat exchange tube 111 and the first windward heat exchange, and after flowing through the branch where the first regulating component 141 is located, it will flow out of the heat exchanger 1 from the first refrigerant end 101.

[0058] The first regulating component 141 may include a check valve, a solenoid valve, or a multi-way valve, etc.

[0059] Under the adjustment of the second adjustment component 142, when the refrigerant flows in from the first refrigerant end 101, after the refrigerant has been heated by the second back-wind heat exchanger 1 tube, it will be heated by the second front-wind heat exchanger tube 122. The refrigerant flowing out of the second front-wind heat exchanger tube 122 will not flow directly to the second refrigerant end 102, but will all flow from the first back-wind heat exchanger tube 111 into the first heat exchange section 11 for heat exchange. After the refrigerant flowing out of the first back-wind heat exchanger tube 111 flows into the first front-wind heat exchanger tube 112 for heat exchange, the refrigerant flowing out of the first front-wind heat exchanger tube 112 will flow out of the heat exchanger 1 from the second refrigerant end 102.

[0060] The second regulating component 142 may include a check valve, a solenoid valve, or a multi-way valve, etc.

[0061] In this embodiment, through the cooperation of the first adjustment component 141 and the second adjustment component 142, the heat exchanger 1 can adapt to different refrigerant flow directions and adopt different heat exchange methods. During the cooling process, in the condensation state, different heat exchange parts in the heat exchanger 1 can all perform countercurrent heat exchange. During the heating process, in the evaporation state, different heat exchange parts in the heat exchanger 1 can respectively adopt countercurrent heat exchange and cocurrent heat exchange. This ensures that the heat exchange effect of the heat exchanger 1 can be optimized during both air conditioning heating and cooling, thereby improving the heat exchange effect of the heat exchanger 1 and reducing the risk of frost formation on the heat exchanger 1.

[0062] In one feasible implementation, refer to Figure 1 and Figure 2 The first regulating component 141 includes a first one-way valve, which is configured to allow one-way flow from the first air-facing heat exchange pipe 112 to the first pipeline 15.

[0063] In this embodiment, the first regulating component 141 is configured as a first one-way valve, which is beneficial to realize that the connection state between the first windward heat exchange tube 112 and the first refrigerant end 101 can be adaptively switched according to different refrigerant flow directions without the need for electronic control. This helps to simplify the system, improve switching efficiency, and improve the heat exchange effect of the heat exchanger 1.

[0064] In other embodiments, the first regulating component 141 may also include a solenoid valve that is set to close when refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, and is set to open when refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101.

[0065] In one feasible implementation, refer to Figure 1 and Figure 2 The second adjustment component 142 includes:

[0066] The second one-way valve 1421 is connected to the two ends of the second refrigerant end 102 and the connecting part 13 respectively. The second one-way valve 1421 is configured to allow one-way flow from the second refrigerant end 102 to the connecting part 13.

[0067] The third one-way valve 1422 is connected to the two ends of the second refrigerant end 102 and the first air-facing heat exchange pipe 112 respectively. The third one-way valve 1422 is configured to allow one-way flow from the first air-facing heat exchange pipe 112 to the second refrigerant end 102.

[0068] In this embodiment, the second regulating component 142 is configured as a second one-way valve 1421 and a third one-way valve 1422, which is beneficial to realize that the connection state between the first windward heat exchange tube 112 and the first refrigerant end 101 can be adaptively switched according to different refrigerant flow directions without the need for electronic control. This helps to simplify the system, improve switching efficiency, and improve the heat exchange effect of the heat exchanger 1.

[0069] In other embodiments, the second regulating component 142 may also include a three-way valve, with the first air-facing heat exchange pipe 112, the second refrigerant end 102, and the connecting part 13 respectively connected to different valve ports of the three-way valve. When the refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, the three-way valve operates in the first valve position, with the first air-facing heat exchange pipe 112 connected to the second refrigerant end 102 and the connecting part 13 blocked from the second refrigerant end 102. When the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101, the three-way valve operates in the second valve position, with the first air-facing heat exchange pipe 112 blocked from the second refrigerant end 102 and the connecting part 13 connected to the second refrigerant end 102.

[0070] In one feasible implementation, refer to Figure 1 and Figure 2 The first heat exchange section 11 includes at least two parallel first tube groups 11a, each first tube group 11a including a first leeward heat exchange tube 111 and a first windward heat exchange tube 112 connected in series.

[0071] In this embodiment, more than one first tube group 11a is arranged in parallel in the first heat exchange section 11, which helps to reduce flow resistance and further improve the heat exchange efficiency of the first heat exchange section 11.

[0072] In one feasible implementation, refer to Figure 1 and Figure 2 The second heat exchange section 12 includes at least two parallel second tube groups 12a, each second tube group 12a including a second leeward heat exchange tube 121 and a second front wind heat exchange tube 122 connected in series.

[0073] In this embodiment, more than one second tube group 12a is provided in parallel in the second heat exchange section 12, which helps to reduce flow resistance and further improve the heat exchange efficiency of the second heat exchange section 12.

[0074] In one feasible implementation, refer to Figure 1 The first heat exchange section 11 is located above the second heat exchange section 12.

[0075] In this embodiment, the heat exchange area of ​​the first heat exchange section 11 is smaller than the heat exchange area of ​​the second heat exchange section 12.

[0076] In this way, when the first heat exchanger 1 is in a condensing state, the temperature of the first heat exchange section 11 is lower than the temperature of the second heat exchange section 12, which helps to avoid heat rising and causing the local temperature of the heat exchanger 1 to be too high, and helps to improve the reliability of system operation.

[0077] In another feasible implementation, refer to Figure 2 The second heat exchange section 12 is located above the first heat exchange section 11.

[0078] In the above manner, when the first heat exchanger 1 is in a condensed state, the temperature difference between the first heat exchange section 11 and its surrounding area is large enough when heat rises, which is beneficial to improving the heat exchange efficiency of the heat exchanger 1.

[0079] In another feasible embodiment, the first heat exchange section 11 and the second heat exchange section 12 may also be arranged in a transverse direction.

[0080] This utility model also proposes an outdoor unit 100, as shown in the reference. Figure 3 The outdoor unit 100 includes an outdoor fan 7, a throttling device 3, a reversing assembly 2, a compressor 4, and the aforementioned heat exchanger 1. The specific structure of the heat exchanger 1 is as described in the above embodiments. Since the outdoor unit 100 in this embodiment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0081] The first refrigerant end 101, the exhaust port of the compressor 4, and the return port of the compressor 4 are all connected to the reversing assembly 2, and the second refrigerant end 102 is connected to the throttling device 3; the first windward heat exchange pipe 112 and the first leeward heat exchange pipe 111 are arranged sequentially along the airflow direction driven by the outdoor fan 7; the second windward heat exchange pipe 122 and the second leeward heat exchange pipe 121 are arranged sequentially along the airflow direction driven by the outdoor fan 7.

[0082] The reversing assembly 2 (e.g., a four-way valve) has a first operating state and a second operating state. When the reversing assembly 2 is in the first operating state, the exhaust port of the compressor 4 is connected to the first refrigerant end 101 of the heat exchanger 1, and the refrigerant flows from the first refrigerant end 101 to the second refrigerant end 102, and the heat exchanger 1 is in a condensing state. When the reversing assembly 2 is in the second operating state, the return port of the compressor 4 is connected to the first refrigerant end 101 of the heat exchanger 1, and the refrigerant flows from the second refrigerant end 102 to the first refrigerant end 101, and the heat exchanger 1 is in an evaporating state.

[0083] When the reversing assembly 2 is in the first operating state, the air conditioner where the outdoor unit 100 is located is in cooling operation, the return port of the compressor 4 in the indoor heat exchange device 5 is connected, and the indoor heat exchange device 5 is in evaporation state; when the reversing assembly 2 is in the second operating state, the air conditioner where the outdoor unit 100 is located is in heating operation, the exhaust port of the compressor 4 in the indoor heat exchange device 5 is connected, and the indoor heat exchange device 5 is in condensation state.

[0084] The first windward heat exchange pipe 112 and the second windward heat exchange pipe 122 are located upstream of the airflow direction driven by the outdoor fan 7, and the first leeward heat exchange pipe 111 and the second leeward heat exchange pipe 121 are located downstream of the airflow direction driven by the outdoor fan 7.

[0085] This utility model also proposes an air conditioner, which can be a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling-mounted air conditioner, a multi-split air conditioner, etc.

[0086] The air conditioner may include the outdoor unit 100 and the indoor unit mentioned above. The indoor unit includes an indoor heat exchange device 5 and a corresponding indoor fan 6. When the indoor fan 6 is turned on, it can drive the air in the indoor space to exchange heat with the indoor heat exchange device 5.

[0087] The air conditioner includes a refrigerant circulation loop, which includes the heat exchanger 1, compressor 4, reversing assembly 2, throttling device 3 in the outdoor unit 100, and indoor heat exchanger 5 in the indoor unit. The indoor heat exchanger 5, throttling device 3, and heat exchanger 1 are connected in sequence. The exhaust port of the heat exchanger 1, indoor heat exchanger 5, and compressor 4, as well as the return port of compressor 4, are all connected to the reversing assembly 2.

[0088] When the reversing assembly 2 is running in the first operating state, the refrigerant discharged when the compressor 4 is turned on flows sequentially through the heat exchanger 1, the throttling device 3, and the indoor heat exchanger 5 before returning to the compressor 4; when the reversing assembly 2 is running in the second operating state, the refrigerant discharged when the compressor 4 is turned on flows sequentially through the indoor heat exchanger 5, the throttling device 3, and the heat exchanger 1 before returning to the compressor 4.

[0089] In this embodiment, the specific structure of the heat exchanger 1 in the air conditioner is the same as in the above embodiments. Since the outdoor unit 100 in this embodiment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0090] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A heat exchanger, characterized in that, The heat exchanger includes: First refrigerant end and second refrigerant end; The first heat exchange section includes a first leeward heat exchange tube and a first frontal heat exchange tube connected in series. The second heat exchange section includes a second leeward heat exchange tube and a second forward heat exchange tube connected in series, the second forward heat exchange tube being connected to the first leeward heat exchange tube; and... The flow direction adjustment component is connected to the connecting portion between the first leeward heat exchange pipe and the second windward heat exchange pipe, the first windward heat exchange pipe, the second leeward heat exchange pipe, the first refrigerant end, and the second refrigerant end. The flow direction adjustment component is configured to adjust the refrigerant to flow sequentially through the second leeward heat exchange pipe, the second windward heat exchange pipe, the first leeward heat exchange pipe, and the first leeward heat exchange pipe when the refrigerant flows from the second refrigerant end to the second refrigerant end. The flow direction adjustment component is also configured to adjust the refrigerant to flow into the corresponding heat exchange section from the first leeward heat exchange pipe and the second windward heat exchange pipe respectively when the refrigerant flows from the second refrigerant end to the first refrigerant end.

2. The heat exchanger as described in claim 1, characterized in that, The flow direction adjustment component includes: The first regulating component is configured to block the connection between the first refrigerant end and the first airflow heat exchanger when the refrigerant flows from the first refrigerant end to the second refrigerant end, and to connect the first refrigerant end to the first airflow heat exchanger when the refrigerant flows from the second refrigerant end to the first refrigerant end; The second regulating component is connected to the connecting part, the second refrigerant end, and the first air-facing heat exchange pipe. The second regulating component is configured to switch between a first state and a second state. In the first state, when the refrigerant flows from the first refrigerant end to the second refrigerant end, the first air-facing heat exchange pipe is connected to the second refrigerant end. In the second state, when the refrigerant flows from the second refrigerant end to the first refrigerant end, the connecting part is connected to the second refrigerant end.

3. The heat exchanger as described in claim 2, characterized in that, The first regulating component includes a first one-way valve, which is configured to allow one-way flow from the first air-facing heat exchange tube to the first pipeline.

4. The heat exchanger as described in claim 2, characterized in that, The second adjustment component includes: The second one-way valve is configured to allow unidirectional flow from the second refrigerant end to the connecting part. The second one-way valve is connected to both ends of the second one-way valve, and the second one-way valve is configured to allow unidirectional flow from the second refrigerant end to the connecting part. The third one-way valve is connected to both ends of the second refrigerant end and the first air-facing heat exchange pipe, respectively. The third one-way valve is configured to allow one-way flow from the first air-facing heat exchange pipe to the second refrigerant end.

5. The heat exchanger as described in claim 1, characterized in that, The first heat exchange section includes at least two first tube groups connected in parallel, each first tube group including a first leeward heat exchange tube and a first frontal heat exchange tube connected in series.

6. The heat exchanger as described in claim 1, characterized in that, The second heat exchange section includes at least two parallel second tube groups, each second tube group including a second leeward heat exchange tube and a second frontal heat exchange tube connected in series.

7. The heat exchanger as described in any one of claims 1 to 6, characterized in that, The first heat exchange section is located above the second heat exchange section.

8. The heat exchanger as described in any one of claims 1 to 6, characterized in that, The second heat exchange section is located above the first heat exchange section.

9. An outdoor unit, characterized in that, The outdoor unit includes an outdoor fan, a throttling device, a reversing assembly, a compressor, and a heat exchanger as described in any one of claims 1 to 8. The first refrigerant end, the exhaust port of the compressor, and the return port of the compressor are all connected to the reversing assembly, and the second refrigerant end is connected to the throttling device. The first windward heat exchange pipe and the first leeward heat exchange pipe are arranged sequentially along the airflow direction driven by the outdoor fan. The second windward heat exchange pipe and the second leeward heat exchange pipe are arranged sequentially along the airflow direction driven by the outdoor fan.

10. An air conditioner, characterized in that, The air conditioner includes an outdoor unit and an indoor heat exchange device as described in claim 9, wherein the indoor heat exchange device is connected to the reversing assembly, and the indoor heat exchange device, the throttling device, and the heat exchanger are connected in sequence.

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