Outdoor heat exchanger, air conditioner outdoor unit and air conditioner

Abstract

The invention discloses an outdoor heat exchanger, an air conditioner outdoor unit and an air conditioner. A heat exchange flow path of the outdoor heat exchanger is provided with a main inlet and a main outlet and comprises a first flow path, a second flow path and a third flow path. One end of the first branch is communicated with one end of the second flow path and one end of the third flow path, the other end of the first branch and one end of the first flow path are both communicated with the main inlet, and the first branch is provided with a first one-way valve; one end of the second branch is communicated with the end, deviating from the main inlet, of the first flow path and the end, deviating from the first branch, of the second flow path, the other end of the second branch and the end, deviating from the first branch, of the third flow path are both communicated with the main outlet, and a second one-way valve is arranged on the second branch. The refrigerant flows from the main outlet to the main inlet, so that the problem of bias flow generated by multiple flow paths during refrigeration can be improved, the problem of non-uniform temperature is improved, the temperature of the outlet of the outdoor heat exchanger is favorably reduced, and heat dissipation and cooling of the electric control module are favorably realized.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and in particular to an outdoor heat exchanger, an air conditioner outdoor unit and an air conditioner. Background Art

[0002] The electronic control module in the air conditioner outdoor unit integrates high-density components, which will generate heat during the working process, resulting in a high temperature of the module. Under harsh working conditions of high outdoor temperature or high frequency of the compressor, the heat of the electronic control board rises very quickly. When it exceeds a certain safety range, it will cause a shutdown state. In severe cases, the electronic control board will be damaged, and the air conditioner will eventually fail to operate normally.

[0003] In the related technology, in addition to air cooling, the heat dissipation of the outdoor unit electronic control module is better in cooling effect. The refrigerant ring technology is a liquid cooling technology that allows the refrigerant to flow through the outdoor unit electronic control module. Its heat dissipation effect is closely related to the refrigerant temperature. In the air conditioner cooling mode, the electronic control module is connected to the outlet of the condenser. However, there are still certain problems with the existing refrigerant ring heat dissipation. For example, the refrigerant temperature for the electronic control module is not low enough to dissipate the heat of the higher temperature electronic control module, or when the air conditioner is cooling, when the condenser flows in multiple flow paths, it is easy to produce bias flow, resulting in uneven temperatures in each flow path, which is not conducive to reducing the total outlet temperature of the refrigerant. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an outdoor heat exchanger, which can improve the problem of biased flow in multiple flow paths during refrigeration, thereby improving the problem of uneven temperature in multiple flow paths, enhancing heat exchange efficiency, and facilitating the reduction of the outlet temperature of the outdoor heat exchanger.

[0005] The present invention also provides an air-conditioning outdoor unit, which includes the above-mentioned outdoor heat exchanger.

[0006] The present invention also provides an air conditioner, which includes the above-mentioned air conditioner outdoor unit.

[0007] According to an outdoor heat exchanger of an embodiment of the present invention, the outdoor heat exchanger includes a heat exchanger body and a plurality of heat exchange tubes arranged in the heat exchanger body, the heat exchange flow path of the outdoor heat exchanger has a total inlet and a total outlet and includes: a first flow path, a second flow path, and a third flow path, the first flow path, the second flow path and the third flow path all flow through part of the heat exchange tubes; a first branch, the first branch is arranged outside the heat exchanger body, one end of the first branch is connected with one end of the second flow path and one end of the third flow path, the other end of the first branch and one end of the first flow path are both connected with the total inlet, and the first branch is provided with a first one-way valve, the first one-way valve only allows the refrigerant to flow through the The end of the first branch connected to the main inlet flows toward the end of the first branch away from the main inlet; the second branch, the second branch is arranged outside the heat exchanger body, one end of the second branch is connected with the end of the first flow path away from the main inlet and the end of the second flow path away from the first branch, the other end of the second branch and the end of the third flow path away from the first branch are both connected to the main outlet, the second branch is provided with a second one-way valve, the second one-way valve only allows the refrigerant to flow from the end of the second branch away from the main outlet to the end of the second branch connected to the main outlet, when the air conditioner is cooling, the refrigerant flows from the main outlet to the main inlet.

[0008] According to the outdoor heat exchanger of an embodiment of the present invention, one end of the first branch is connected with one end of the second flow path and one end of the third flow path, the other end of the first branch and one end of the first flow path are both connected with the total inlet, one end of the second branch is connected with an end of the first flow path away from the total inlet and an end of the second flow path away from the first branch, and the other end of the second branch and an end of the third flow path away from the first branch are both connected with the total outlet. In the present application, a first one-way valve is arranged on the first branch and a second one-way valve is arranged on the second branch. The first one-way valve only allows the refrigerant to flow from one end of the first branch connected to the main inlet to the end of the first branch away from the main inlet, and the second one-way valve only allows the refrigerant to flow from one end of the second branch away from the main outlet to one end of the second branch connected to the main outlet. This can make the air conditioner flow through different flow paths during cooling and heating, and the number of parallel flow paths of the outdoor heat exchanger during cooling is less than the number of parallel flow paths of the outdoor heat exchanger during heating. This can improve the problem of biased flow in multiple flow paths during cooling, improve the problem of uneven temperature in multiple flow paths, enhance the heat exchange efficiency, and thus help to reduce the outlet temperature of the outdoor heat exchanger, thereby helping to dissipate heat and cool the electronic control module, enable the electronic control module to work at higher temperatures, and break through the unlimited cooling effect of the air conditioner at higher temperatures outdoors.

[0009] According to some embodiments of the present invention, the second flow path and the third flow path are connected to the first branch through a tee or a distributor.

[0010] According to some embodiments of the present invention, the heat exchange flow path also includes a fourth flow path, which flows through part of the heat exchange tube, and one end of the fourth flow path is connected to an end of the first branch away from the total inlet, and the other end is connected to the total outlet.

[0011] In some embodiments of the present invention, the second flow path, the third flow path and the fourth flow path are connected to the first branch through a distributor.

[0012] In some embodiments of the present invention, the third flow path includes a first sub-flow path and a second sub-flow path arranged in parallel, and the first sub-flow path and the second sub-flow path both flow through a portion of the heat exchange tube.

[0013] In some embodiments of the present invention, the fourth flow path includes a third sub-flow path and a fourth sub-flow path that are arranged in parallel, and the third sub-flow path and the fourth sub-flow path both flow through a portion of the heat exchange tube.

[0014] In some embodiments of the present invention, the outdoor heat exchanger has a first end and a second end relative to each other, and in the direction from the first end to the second end, the heat exchange tubes of the first flow path, the heat exchange tubes of the second flow path, the heat exchange tubes of the third flow path and the heat exchange tubes of the fourth flow path are arranged in sequence.

[0015] According to some embodiments of the present invention, the outdoor heat exchanger has a first end and a second end opposite to each other, the plurality of heat exchange tubes are arranged in a single row or multiple rows, and the plurality of heat exchange tubes in the same row are arranged in a direction from the first end to the second end.

[0016] According to an embodiment of the present invention, an air-conditioning outdoor unit includes: a shell; an electronic control module, which is arranged in the shell and has a cooling flow path; the above-mentioned outdoor heat exchanger, which is arranged in the shell, and the main inlet is connected to one end of the cooling flow path.

[0017] According to the air conditioner outdoor unit of an embodiment of the present invention, by setting the above-mentioned outdoor heat exchanger, one end of the first branch is connected with one end of the second flow path and one end of the third flow path, the other end of the first branch and one end of the first flow path are both connected with the total inlet, one end of the second branch is connected with an end of the first flow path away from the total inlet and an end of the second flow path away from the first branch, and the other end of the second branch and an end of the third flow path away from the first branch are both connected with the total outlet. In the present application, a first one-way valve is arranged on the first branch and a second one-way valve is arranged on the second branch. The first one-way valve only allows the refrigerant to flow from one end of the first branch connected to the main inlet to the end of the first branch away from the main inlet, and the second one-way valve only allows the refrigerant to flow from one end of the second branch away from the main outlet to one end of the second branch connected to the main outlet. This can make the air conditioner flow through different flow paths during cooling and heating, and the number of parallel flow paths of the outdoor heat exchanger during cooling is less than the number of parallel flow paths of the outdoor heat exchanger during heating. This can improve the problem of biased flow in multiple flow paths during cooling, improve the problem of uneven temperature in multiple flow paths, enhance the heat exchange efficiency, and thus help to reduce the outlet temperature of the outdoor heat exchanger, thereby helping to dissipate heat and cool the electronic control module, enable the electronic control module to work at higher temperatures, and break through the unlimited cooling effect of the air conditioner at higher temperatures outdoors.

[0018] An air conditioner according to an embodiment of the present invention includes the above-mentioned air conditioner outdoor unit.

[0019] According to the air conditioner of an embodiment of the present invention, by setting the above-mentioned air-conditioning outdoor unit, the above-mentioned air-conditioning outdoor unit includes the above-mentioned outdoor heat exchanger, one end of the first branch is connected with one end of the second flow path and one end of the third flow path, the other end of the first branch and one end of the first flow path are both connected with the total inlet, one end of the second branch is connected with one end of the first flow path away from the total inlet and one end of the second flow path away from the first branch, and the other end of the second branch and one end of the third flow path away from the first branch are both connected with the total outlet. In the present application, a first one-way valve is arranged on the first branch and a second one-way valve is arranged on the second branch. The first one-way valve only allows the refrigerant to flow from one end of the first branch connected to the main inlet to the end of the first branch away from the main inlet, and the second one-way valve only allows the refrigerant to flow from one end of the second branch away from the main outlet to one end of the second branch connected to the main outlet. This can make the air conditioner flow through different flow paths during cooling and heating, and the number of parallel flow paths of the outdoor heat exchanger during cooling is less than the number of parallel flow paths of the outdoor heat exchanger during heating. This can improve the problem of biased flow in multiple flow paths during cooling, improve the problem of uneven temperature in multiple flow paths, enhance the heat exchange efficiency, and thus help to reduce the outlet temperature of the outdoor heat exchanger, thereby helping to dissipate heat and cool the electronic control module, enable the electronic control module to work at higher temperatures, and break through the unlimited cooling effect of the air conditioner at higher temperatures outdoors.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a refrigerant loop of an electric control module according to an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of a flow path of an outdoor heat exchanger according to a first embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of a flow path of an outdoor heat exchanger according to a second embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of a flow path of an outdoor heat exchanger according to a third embodiment of the present invention;

[0027] Figure 6 4 is a schematic diagram of a flow path of an outdoor heat exchanger according to a fourth embodiment of the present invention.

[0028] Reference numerals:

[0029] 100. Refrigeration system;

[0030] 10. Outdoor heat exchanger;

[0031] 1. Heat exchanger body; 2. Heat exchange tube;

[0032] 3. heat exchange flow path; 31. first flow path; 32. second flow path; 33. third flow path; 331. first sub-flow path; 332. second sub-flow path; 333. first main path; 334. third main path; 34. fourth flow path; 341. third sub-flow path; 342. fourth sub-flow path; 343. second main path; 344. fourth main path; 35. first branch path; 351. first check valve; 36. second branch path; 361. second check valve; 37. total inlet; 38. total outlet; 39. distributor;

[0033] 20. Electric control module; 201. Electric control board; 202. Electronic components; 203. Heat dissipation substrate; 204. Fixed baffle; 205. Heat dissipation pipe;

[0034] 30. compressor; 40. indoor heat exchanger; 50. throttling device; 60. electronic expansion valve; 70. four-way valve; 701. first valve port; 702. second valve port; 703. third valve port; 704. fourth valve port. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Reference below Figure 1 A refrigeration system 100 of an air conditioner according to an embodiment of the present invention is described.

[0039] like Figure 1 As shown, the refrigeration system 100 includes a compressor 30 , an outdoor heat exchanger 10 , an indoor heat exchanger 40 , a throttling device 50 , a four-way valve 70 and an electronic control module 20 .

[0040] Specifically, the compressor 30 has an exhaust port 301 and an intake port 302, and the four-way valve 70 has a first valve port 701, a second valve port 702, a third valve port 703 and a fourth valve port 704. The first valve port 701 is connected to the exhaust port 301, the second valve port 702 is connected to the total outlet 38 of the outdoor heat exchanger 10, the third valve port 703 is connected to one end of the indoor heat exchanger 40, and the fourth valve port 704 is connected to the intake port 302. The first valve port 701 is connected to one of the second valve port 702 and the third valve port 703, and the fourth valve port 704 is connected to the other of the second valve port 702 and the third valve port 703; the total inlet 37 of the outdoor heat exchanger 10 is connected to one end of the throttling device 50, the other end of the throttling device 50 is connected to one end of the cooling flow path in the electronic control module 20, and the other end of the cooling flow path in the electronic control module 20 is connected to the other end of the indoor heat exchanger 40.

[0041] In the cooling mode, the first valve port 701 is connected to the second valve port 702, and the fourth valve port 704 is connected to the third valve port 703. The high-temperature and high-pressure refrigerant discharged from the exhaust port 301 of the compressor 30 first flows to the outdoor heat exchanger 10, where the refrigerant condenses and dissipates heat in the outdoor heat exchanger 10, and the temperature is reduced. Then, the refrigerant flows to the throttling device 50, and after throttling and reducing the pressure by the throttling device 50, it flows to the cooling flow path of the electronic control module 20 to dissipate heat for the electronic control module 20. The refrigerant flowing out of the cooling flow path flows to the indoor heat exchanger 40, where the refrigerant evaporates and absorbs heat, and finally flows to the suction port 302 of the compressor 30 for the next cycle. The refrigerant flow direction is as follows: Figure 1 a in.

[0042] In the heating mode, the first valve port 701 is connected to the third valve port 703, and the fourth valve port 704 is connected to the second valve port 702. The high-temperature and high-pressure refrigerant discharged from the exhaust port 301 of the compressor 30 first flows to the indoor heat exchanger 40, where the refrigerant condenses and dissipates heat in the indoor heat exchanger 40, and the temperature is reduced. Then, the refrigerant flows to the cooling flow path of the electronic control module 20 to dissipate heat for the electronic control module 20. The refrigerant flowing out of the cooling flow path flows to the throttling device 50, and after throttling and reducing the pressure by the throttling device 50, it flows to the outdoor heat exchanger 10. The refrigerant evaporates and absorbs heat in the outdoor heat exchanger 10, and finally flows to the suction port 302 of the compressor 30 for the next cycle. The refrigerant flow direction is as follows: Figure 1 b in.

[0043] The outdoor heat exchanger 10 is used for heat exchange outdoors, and an electronic expansion valve 60 may be provided between the cooling flow path of the electronic control module 20 and the indoor heat exchanger 40 .

[0044] When the air conditioner is operated under harsh outdoor high temperature conditions or the compressor 30 is operated at high frequency, the temperature of the electric control module 20 is high and rises quickly. At this time, the air conditioner is generally used for cooling, and the refrigerant flowing out of the outdoor heat exchanger 10 flows to the cooling flow path of the electric control module 20. Since the refrigerant is condensed from the outdoor heat exchanger 10, the temperature of the refrigerant flowing out of the outdoor heat exchanger 10 is lower than the temperature of the electric control module 20. After reaching a certain temperature difference, liquid cooling can be completed, and the heat of the electronic components 202 in the electric control module 20 can be taken away, which is more efficient than air cooling. Among them, the lower the temperature of the refrigerant flowing out of the outdoor heat exchanger 10, the better the heat exchange effect can be provided.

[0045] like Figure 2 As shown, an electric control module 20 according to an embodiment of the present invention is described.

[0046] Specifically, the electric control module 20 includes an electric control board 201 , electronic components 202 , a heat dissipation substrate 203 , a heat dissipation pipe 205 and a fixed baffle 204 .

[0047] Specifically, the electronic components 202 are arranged on the electric control board 201, and the electronic components 202 include IGBT, bridge stack, fast recovery diode, etc. The number of electronic components 202 on the electric control board 201 is large and dense, resulting in high heat flux density and high temperature of the electric control board 201 during outdoor high-temperature operation. The heat dissipation substrate 203 is bonded to the electronic components 202, the fixed baffle 204 is stacked with the heat dissipation substrate 203 and is located on the side of the heat dissipation substrate 203 away from the electronic components 202, the heat dissipation pipe 205 is located between the heat dissipation substrate 203 and the fixed baffle 204 and is bonded to the heat dissipation substrate 203 and the fixed baffle 204, and the heat dissipation pipe 205 is configured to form the above-mentioned cooling flow path.

[0048] The heat on the electronic component 202 is transferred to the heat dissipation substrate 203 , and the coldness of the refrigerant is transferred to the heat dissipation pipe 205 . The heat dissipation substrate 203 and the heat dissipation pipe 205 exchange heat, thereby achieving cooling of the electronic component 202 .

[0049] In order to further expand the heat exchange effect of the refrigerant ring on the electronic control module 20, optimize the refrigeration bias phenomenon, improve the high temperature operation resistance of the air conditioner, and break through the higher outdoor temperature operation, this application proposes a linkage method between the variable flow path and the refrigerant ring of the outdoor heat exchanger 10. The variable flow path is designed through the flow path, so that the number of pipes for the refrigerant flow during cooling and heating is different, achieving a better heat exchange effect during cooling and heating of the air conditioner.

[0050] Reference below Figure 3 The outdoor heat exchanger 10 according to the embodiment of the present invention is described.

[0051] like Figure 3As shown, the outdoor heat exchanger 10 according to the embodiment of the present invention comprises a heat exchanger body 1 and a plurality of heat exchange tubes 2 arranged in the heat exchanger body 1. The heat exchanger body 1 may be a plurality of spaced fins, and the heat exchange tubes 2 may be U-shaped tubes passing through the fins.

[0052] like Figure 3 As shown, the heat exchange flow path 3 of the outdoor heat exchanger 10 has a total inlet 37 and a total outlet 38 and includes: a first flow path 31 , a second flow path 32 , a third flow path 33 , a first branch path 35 and a second branch path 36 .

[0053] Specifically, the first flow path 31, the second flow path 32 and the third flow path 33 all flow through a portion of the heat exchange tube 2, and the first branch 35 is disposed outside the heat exchanger body 1. One end of the first branch 35 is connected to one end of the second flow path 32 and one end of the third flow path 33, and the other end of the first branch 35 and one end of the first flow path 31 are both connected to the main inlet 37. The first branch 35 has a first check valve 351, and the first check valve 351 only allows the refrigerant to flow from one end of the first branch 35 connected to the main inlet 37 to one end of the first branch 35 away from the main inlet 37. The second branch 36 is arranged outside the heat exchanger body 1, and one end of the second branch 36 is connected with one end of the first flow path 31 away from the total inlet 37 and one end of the second flow path 32 away from the first branch 35, and the other end of the second branch 36 and one end of the third flow path 33 away from the first branch 35 are both connected with the total outlet 38. The second branch 36 has a second one-way valve 361, and the second one-way valve 361 only allows the refrigerant to flow from one end of the second branch 36 away from the total outlet 38 to one end of the second branch 36 connected to the total outlet 38. When the air conditioner is cooling, the refrigerant flows from the total outlet 38 to the total inlet 37, and correspondingly, when the air conditioner is heating, the refrigerant flows from the total inlet 37 to the total outlet 38.

[0054] It can be understood that when the air conditioner is cooling, the refrigerant flows in from the main outlet 38. Due to the setting of the second one-way valve 361, the refrigerant will not flow to the second branch 36, but will flow to the third flow path 33. Moreover, due to the setting of the first one-way valve 351, the refrigerant flowing out of the third flow path 33 will not flow to the first branch 35. The refrigerant flowing out of the third flow path 33 will flow to the second flow path 32 through the connection point of the second flow path 32, the third flow path 33 and the first branch 35. Due to the inlet pressure of the main outlet 38, the refrigerant flowing out of the second flow path 32 will not flow to the main outlet 38 through the second branch 36, but will flow to the first flow path 31 through the connection point of the first flow path 31, the second flow path 32 and the second branch 36, and then flow out from the main inlet 37. Due to the refrigerant flow pressure, the refrigerant flowing to the main inlet 37 will not flow to the second flow path 32 and the third flow path 33 through the first branch 35.

[0055] When the air conditioner is heating, the refrigerant flows in from the main inlet 37 and then flows to the first flow path 31 and the first branch 35 respectively. The refrigerant flowing out of the first branch 35 flows to the second flow path 32 and the third flow path 33 respectively. The refrigerant flowing out of the first flow path 31 and the second flow path 32 is combined and flows into the second branch 36. The refrigerant in the second branch 36 and the refrigerant in the third flow path 33 are combined and flow to the main outlet 38.

[0056] As can be seen from the above, the number of parallel flow paths of the outdoor heat exchanger 10 during cooling is less than the number of parallel flow paths of the outdoor heat exchanger 10 during heating, thereby improving the problem of biased flow in multiple flow paths during cooling, improving the problem of uneven temperature in multiple flow paths, and enhancing heat exchange efficiency, which is conducive to reducing the outlet temperature of the outdoor heat exchanger 10, thereby facilitating heat dissipation and cooling of the electronic control module 20. In addition, when the air conditioner is heating, there are more parallel flow paths, which is conducive to improving the heat exchange effect.

[0057] The heat exchange effect of the outdoor heat exchanger 10 of the present application is explained below in combination with Table 1 and Table 2, wherein Table 1 shows the outlet temperature of the outdoor heat exchanger 10 in cooling mode at different outdoor temperatures, and Table 2 shows the temperature of each component in the electric control module 20 when different flow paths of the outdoor heat exchanger 10 dissipate heat and cool the electric control module 20.

[0058] Table 1. Refrigerant outlet temperature of different flow paths

[0059] 35 degrees cooling 43 degrees refrigeration 48 degrees refrigeration Existing outdoor heat exchanger outlet temperature (℃) 37.9 47.5 53.6 The application outdoor heat exchanger outlet temperature (℃) 35.6 44.5 50.3

[0060] Table 2. Electrical heating of different flow paths

[0061]

[0062] Among them, the existing outdoor heat exchanger has the same and opposite refrigerant flow path during cooling and heating.

[0063] It can be seen from Table 1 that compared with the existing outdoor heat exchanger, the outlet temperature of the outdoor heat exchanger 10 of the present application is 2-3 degrees lower than that of the existing outdoor heat exchanger when the air conditioner is cooling, and the higher the outdoor temperature, the greater the reduction in the outlet temperature of the outdoor heat exchanger 10 of the present application compared with the existing outdoor heat exchanger when the air conditioner is cooling, and the more obvious the advantage.

[0064] In addition, when the air conditioner is cooling, the lower the outlet temperature of the outdoor heat exchanger 10, the greater the temperature difference with the electronic control module 20, and the better the heat dissipation effect. As shown in Table 2, the refrigeration system 100 using the outdoor heat exchanger 10 of the present application has a lower cooling effect on the same component of the electronic control module compared to the refrigeration system using the existing outdoor heat exchanger. Under the working conditions of 27°C indoors and 35°C outdoors, the temperature drop of the frequency conversion module, IGBT, bridge stack, and fast recovery diode ranges from 2.1 to 3.4°C, providing a basic guarantee for the refrigerant ring to break through the use of higher temperatures.

[0065] According to the outdoor heat exchanger 10 of the embodiment of the present invention, one end of the first branch 35 is connected with one end of the second flow path 32 and one end of the third flow path 33, the other end of the first branch 35 and one end of the first flow path 31 are both connected with the total inlet 37, one end of the second branch 36 is connected with one end of the first flow path 31 away from the total inlet 37 and one end of the second flow path 32 away from the first branch 35, and the other end of the second branch 36 and one end of the third flow path 33 away from the first branch 35 are both connected with the total outlet 38. In the present application, a first one-way valve 351 is provided on the first branch 35, and a second one-way valve 361 is provided on the second branch 36. The first one-way valve 351 only allows the refrigerant to flow from the end of the first branch 35 connected to the main inlet 37 to the end of the first branch 35 away from the main inlet 37, and the second one-way valve 361 only allows the refrigerant to flow from the end of the second branch 36 away from the main outlet 38 to the end of the second branch 36 connected to the main outlet 38. This allows the air conditioner to flow through different flow paths during cooling and heating, and the number of parallel flow paths of the outdoor heat exchanger 10 during cooling is less than the number of parallel flow paths of the outdoor heat exchanger 10 during heating. This can improve the problem of biased flow in multiple flow paths during cooling, thereby improving the problem of uneven temperature in multiple flow paths, enhancing the heat exchange efficiency, and thus facilitating the reduction of the outlet temperature of the outdoor heat exchanger 10, thereby facilitating the heat dissipation and cooling of the electric control module 20, enabling the electric control module 20 to work at a higher temperature, and breaking through the unlimited cooling effect of the air conditioner at a higher outdoor temperature.

[0066] In some embodiments of the present invention, Figure 3 As shown, the second flow path 32 and the third flow path 33 are connected to the first branch 35 through a three-way pipe. The three-way pipe has three interfaces, which are interconnected and respectively connected to the second flow path 32, the third flow path 33 and the first branch 35 for conveying refrigerant, thereby facilitating the communication between one end of the first branch 35 away from the main inlet 37 and one end of the second flow path 32 and one end of the third flow path 33.

[0067] Of course, the present invention is not limited to this. Figure 4As shown, the second flow path 32 and the third flow path 33 can also be connected to the first branch 35 through a distributor 39. The distributor 39 can evenly distribute the refrigerant to each channel, so that in the heating mode, the refrigerant flowing out of the first branch 35 can evenly flow to the second flow path 32 and the third flow path 33, avoiding the occurrence of biased flow between the second flow path 32 and the third flow path 33, making the temperature of the second flow path 32 and the third flow path 33 more uniform, and improving the heat exchange efficiency.

[0068] In some embodiments of the present invention, Figure 5 As shown, the heat exchange flow path 3 also includes a fourth flow path 34, the fourth flow path 34 flows through part of the heat exchange tube 2, one end of the fourth flow path 34 is connected to the end of the first branch 35 away from the main inlet 37, and the other end is connected to the main outlet 38. It can be understood that when the air conditioner is cooling, the refrigerant flows in from the main outlet 38. Due to the setting of the second one-way valve 361, the refrigerant will not flow to the second branch 36, and the refrigerant will flow to the third flow path 33 and the fourth flow path 34 at the same time. Moreover, due to the setting of the first one-way valve 351, the refrigerant flowing out of the third flow path 33 and the fourth flow path 34 will not flow to the first branch 35, and the refrigerant flowing out of the third flow path 33 and the fourth flow path 34 will flow through the second flow path 32, the third flow path 33, the fourth flow path 34 and the first branch 35. The connection point of branch 35 flows to the second flow path 32. Due to the inlet pressure of the total outlet 38, the refrigerant flowing out of the second flow path 32 will not flow to the total outlet 38 through the second branch 36, but will flow to the first flow path 31 through the connection point of the first flow path 31, the second flow path 32 and the second branch 36, and then flow out from the total inlet 37. Due to the refrigerant flow pressure, the refrigerant flowing to the total inlet 37 will not flow to the second flow path 32, the third flow path 33 and the fourth flow path 34 through the first branch 35.

[0069] When the air conditioner is heating, the refrigerant flows in from the main inlet 37 and then flows to the first flow path 31 and the first branch 35 respectively. The refrigerant flowing out of the first branch 35 flows to the second flow path 32, the third flow path 33 and the fourth flow path 34 respectively. The refrigerant flowing out of the first flow path 31 and the second flow path 32 is combined and flows into the second branch 36. The refrigerant in the second branch 36, the refrigerant in the third flow path 33 and the refrigerant in the fourth flow path 34 are combined and flow to the main outlet 38.

[0070] Furthermore, if Figure 5 As shown, the second flow path 32, the third flow path 33 and the fourth flow path 34 are connected to the first branch 35 through the distributor 39. Therefore, in the heating mode, the refrigerant flowing out of the first branch 35 is facilitated to flow evenly to the second flow path 32, the third flow path 33 and the fourth flow path 34, avoiding the occurrence of biased flow between the second flow path 32, the third flow path 33 and the fourth flow path 34, making the temperature of the second flow path 32, the third flow path 33 and the fourth flow path 34 more uniform, thereby improving the heat exchange efficiency.

[0071] In a further embodiment of the present invention, Figure 6 As shown, the third flow path 33 includes a first sub-flow path 331 and a second sub-flow path 332 arranged in parallel, and the first sub-flow path 331 and the second sub-flow path 332 both flow through a portion of the heat exchange tube 2. When the air conditioner is in cooling mode, the refrigerant at the total outlet 38 flows to the first sub-flow path 331 and the second sub-flow path 332 at the same time, and the refrigerant flowing out of the first sub-flow path 331 and the second sub-flow path 332 flows to the connection point of the second flow path 32, the third flow path 33, the fourth flow path 34 and the first branch 35. When the air conditioner is in heating mode, the refrigerant flowing out of the first branch 35 flows to the first sub-flow path 331 and the second sub-flow path 332 at the same time when flowing to the third flow path 33.

[0072] Of course, if Figure 6 As shown, the fourth flow path 34 may also include a third sub-flow path 341 and a fourth sub-flow path 342 arranged in parallel, and the third sub-flow path 341 and the fourth sub-flow path 342 both flow through part of the heat exchange tube 2. When the air conditioner is in cooling mode, the refrigerant at the total outlet 38 flows to the third sub-flow path 341 and the fourth sub-flow path 342 at the same time, and the refrigerant flowing out of the third sub-flow path 341 and the fourth sub-flow path 342 flows to the connection point of the second flow path 32, the third flow path 33, the fourth flow path 34 and the first branch 35. When the air conditioner is in heating mode, the refrigerant flowing out of the first branch 35 flows to the third sub-flow path 341 and the fourth sub-flow path 342 at the same time when flowing to the fourth flow path 34.

[0073] Optionally, the third flow path 33 may further include a first main path 333, one end of the first main path 333 is connected to the first branch path 35, and the other end is communicated with the first sub-flow path 331 and the second sub-flow path 332, wherein the first main path 333 and the first sub-flow path 331 and the second sub-flow path 332 may be connected via a tee or a distributor 39. The fourth flow path 34 may further include a second main path 343, one end of the second main path 343 is connected to the first branch path 35, and the other end is communicated with the third sub-flow path 341 and the fourth sub-flow path 342, wherein the second main path 343 and the third sub-flow path 341 and the fourth sub-flow path 342 may be connected via a tee or a distributor 39.

[0074] Of course, the third flow path 33 may also include a third main path 334, one end of which is connected to the main outlet 38, and the other end is in communication with the first sub-flow path 331 and the second sub-flow path 332, wherein the third main path 334 and the first sub-flow path 331 and the second sub-flow path 332 may be connected via a tee or a distributor 39. The fourth flow path 34 may also include a fourth main path 344, one end of which is connected to the main outlet 38, and the other end is in communication with the third sub-flow path 341 and the fourth sub-flow path 342, wherein the fourth main path 344 and the third sub-flow path 341 and the fourth sub-flow path 342 may be connected via a tee or a distributor 39.

[0075] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the outdoor heat exchanger 10 has a first end and a second end opposite to each other, and in the direction from the first end to the second end, the heat exchange tube 2 of the first flow path 31, the heat exchange tube 2 of the second flow path 32, the heat exchange tube 2 of the third flow path 33, and the heat exchange tube 2 of the fourth flow path 34 are arranged in sequence. This facilitates the arrangement of the flow paths, simplifies the connection structure between the flow paths, and in addition, the heat exchange efficiency of the outdoor heat exchanger 10 can be made more uniform in the square from the first end to the second end of the outdoor heat exchanger 10.

[0076] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the outdoor heat exchanger 10 has a first end and a second end opposite to each other, and a plurality of heat exchange tubes 2 are arranged in a single row or multiple rows, and a plurality of heat exchange tubes 2 in the same row are arranged in the direction from the first end to the second end. In this way, the form of the outdoor heat exchanger 10 can be increased, and different rows of heat exchange tubes 2 can be arranged according to different needs to meet different needs.

[0077] In addition, when the outdoor heat exchanger 10 has multiple rows of heat exchange tubes 2 , the first flow path 31 , the second flow path 32 , the third flow path 33 and the fourth flow path 34 all flow through a portion of the heat exchange tubes 2 in each row of heat exchange tubes 2 .

[0078] For example, in Figure 3 and Figure 4 In the example shown, the outdoor heat exchanger 10 has a first end and a second end relative to each other, and a plurality of heat exchange tubes 2 are arranged in a row, wherein the plurality of heat exchange tubes 2 in the row are spaced apart in the direction from the first end to the second end, and the heat exchange tubes 2 of the first flow path 31, the heat exchange tubes 2 of the second flow path 32, and the heat exchange tubes 2 of the third flow path 33 are arranged in the direction from the first end to the second end.

[0079] For example, in Figure 5 In the example shown, the outdoor heat exchanger 10 has a first end and a second end relative to each other, and a plurality of heat exchange tubes 2 are arranged in a row, wherein the plurality of heat exchange tubes 2 in the row are spaced apart in the direction from the first end to the second end, and the heat exchange tubes 2 of the first flow path 31, the heat exchange tubes 2 of the second flow path 32, the heat exchange tubes 2 of the third flow path 33, and the heat exchange tubes 2 of the fourth flow path 34 are arranged in the direction from the first end to the second end.

[0080] For example, in Figure 6In the example shown, the outdoor heat exchanger 10 has a first end and a second end opposite to each other, and a plurality of heat exchange tubes 2 are arranged in two rows, and the plurality of heat exchange tubes 2 in each row are spaced apart in the direction from the first end to the second end, and the heat exchange tubes 2 of the first flow path 31, the heat exchange tubes 2 of the second flow path 32, the heat exchange tubes 2 of the third flow path 33, and the heat exchange tubes 2 of the fourth flow path 34 are arranged in the direction from the first end to the second end. In addition, the heat exchange tubes 2 of the first sub-flow path 331 and the heat exchange tubes 2 of the second sub-flow path 332 are arranged in the direction from the first end to the second end, and the heat exchange tubes 2 of the third sub-flow path 341 and the heat exchange tubes 2 of the fourth sub-flow path 342 are arranged in the direction from the first end to the second end, and the first flow path 31, the second flow path 32, the first sub-flow path 331, the second sub-flow path 332, the third sub-flow path 341, and the fourth sub-flow path 342 all flow through part of the heat exchange tubes 2 in each row of heat exchange tubes 2.

[0081] The following describes an air conditioner outdoor unit according to an embodiment of the present invention.

[0082] The air-conditioning outdoor unit according to the embodiment of the present invention includes a housing, an electric control module 20 and the outdoor heat exchanger 10 described above.

[0083] Specifically, the electronic control module 20 is arranged in the shell and has a cooling flow path, the outdoor heat exchanger 10 is arranged in the shell, and the total inlet 37 is connected to one end of the cooling flow path. When the air conditioner is in the cooling mode, the refrigerant flowing out from the total inlet 37 of the outdoor heat exchanger 10 can flow into the cooling flow path of the electronic control module 20, thereby realizing heat dissipation and cooling of the electronic control module 20.

[0084] According to the air-conditioning outdoor unit of an embodiment of the present invention, by setting the above-mentioned outdoor heat exchanger 10, one end of the first branch 35 is connected with one end of the second flow path 32 and one end of the third flow path 33, the other end of the first branch 35 and one end of the first flow path 31 are both connected with the total inlet 37, one end of the second branch 36 is connected with an end of the first flow path 31 away from the total inlet 37 and an end of the second flow path 32 away from the first branch 35, and the other end of the second branch 36 and an end of the third flow path 33 away from the first branch 35 are both connected with the total outlet 38. In the present application, a first one-way valve 351 is provided on the first branch 35, and a second one-way valve 361 is provided on the second branch 36. The first one-way valve 351 only allows the refrigerant to flow from the end of the first branch 35 connected to the main inlet 37 to the end of the first branch 35 away from the main inlet 37, and the second one-way valve 361 only allows the refrigerant to flow from the end of the second branch 36 away from the main outlet 38 to the end of the second branch 36 connected to the main outlet 38. This allows the air conditioner to flow through different flow paths during cooling and heating, and the number of parallel flow paths of the outdoor heat exchanger 10 during cooling is less than the number of parallel flow paths of the outdoor heat exchanger 10 during heating. This can improve the problem of biased flow in multiple flow paths during cooling, improve the problem of uneven temperature in multiple flow paths, enhance the heat exchange efficiency, and thus facilitate the reduction of the outlet temperature of the outdoor heat exchanger 10, thereby facilitating the heat dissipation and cooling of the electronic control module 20, enabling the electronic control module 20 to work at a higher temperature, and breaking through the unlimited cooling effect of the air conditioner at a higher outdoor temperature.

[0085] The following describes an air conditioner according to an embodiment of the present invention.

[0086] The air conditioner according to an embodiment of the present invention includes the above-mentioned air conditioner outdoor unit and air conditioner indoor unit, the air conditioner indoor unit is provided with an indoor heat exchanger 40, the compressor 30 is provided in the shell of the air conditioner outdoor unit, and the compressor 30, the outdoor heat exchanger 10, the indoor heat exchanger 40 and the throttling device 50 constitute the refrigeration system 100 of the air conditioner.

[0087] According to the air conditioner of an embodiment of the present invention, by setting the above-mentioned air-conditioning outdoor unit, the above-mentioned air-conditioning outdoor unit includes the above-mentioned outdoor heat exchanger 10, one end of the first branch 35 is connected with one end of the second flow path 32 and one end of the third flow path 33, the other end of the first branch 35 and one end of the first flow path 31 are both connected with the total inlet 37, one end of the second branch 36 is connected with one end of the first flow path 31 away from the total inlet 37 and one end of the second flow path 32 away from the first branch 35, and the other end of the second branch 36 and one end of the third flow path 33 away from the first branch 35 are both connected with the total outlet 38. In the present application, a first one-way valve 351 is provided on the first branch 35, and a second one-way valve 361 is provided on the second branch 36. The first one-way valve 351 only allows the refrigerant to flow from the end of the first branch 35 connected to the main inlet 37 to the end of the first branch 35 away from the main inlet 37, and the second one-way valve 361 only allows the refrigerant to flow from the end of the second branch 36 away from the main outlet 38 to the end of the second branch 36 connected to the main outlet 38. This allows the air conditioner to flow through different flow paths during cooling and heating, and the number of parallel flow paths of the outdoor heat exchanger 10 during cooling is less than the number of parallel flow paths of the outdoor heat exchanger 10 during heating. This can improve the problem of biased flow in multiple flow paths during cooling, improve the problem of uneven temperature in multiple flow paths, enhance the heat exchange efficiency, and thus facilitate the reduction of the outlet temperature of the outdoor heat exchanger 10, thereby facilitating the heat dissipation and cooling of the electronic control module 20, enabling the electronic control module 20 to work at a higher temperature, and breaking through the unlimited cooling effect of the air conditioner at a higher outdoor temperature.

[0088] Optionally, the air conditioner can be a split unit, that is, the indoor unit and the outdoor unit are separately arranged, and the indoor unit can be a wall-mounted unit or a cabinet unit. Of course, the air conditioner can also be an integrated unit such as a window air conditioner, in which case the shell of the indoor unit and the shell of the outdoor unit are connected to each other.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0090] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An outdoor heat exchanger, characterized in that: The outdoor heat exchanger comprises a heat exchanger body and a plurality of heat exchange tubes arranged in the heat exchanger body. The heat exchange flow path of the outdoor heat exchanger has a total inlet and a total outlet and comprises: a first flow path, a second flow path, and a third flow path, wherein the first flow path, the second flow path, and the third flow path all flow through a portion of the heat exchange tube; A first branch, the first branch is arranged outside the heat exchanger body, one end of the first branch is connected with one end of the second flow path and one end of the third flow path, the other end of the first branch and one end of the first flow path are both connected with the main inlet, and the first branch is provided with a first one-way valve, the first one-way valve only allows the refrigerant to flow from the end of the first branch connected with the main inlet to the end of the first branch away from the main inlet; a second branch, the second branch is arranged outside the heat exchanger body, one end of the second branch is connected with one end of the first flow path away from the main inlet and one end of the second flow path away from the first branch, the other end of the second branch and one end of the third flow path away from the first branch are both connected with the main outlet, a second one-way valve is provided on the second branch, and the second one-way valve only allows the refrigerant to flow from one end of the second branch away from the main outlet to one end of the second branch connected to the main outlet, When the air conditioner is cooling, the refrigerant flows from the main outlet to the main inlet.

2. The outdoor heat exchanger according to claim 1, characterized in that: The second flow path and the third flow path are connected to the first branch through a tee pipe or a distributor.

3. The outdoor heat exchanger according to claim 1, characterized in that: The heat exchange flow path also includes a fourth flow path, which flows through a portion of the heat exchange tubes, one end of the fourth flow path is connected to an end of the first branch away from the main inlet, and the other end is connected to the main outlet.

4. The outdoor heat exchanger according to claim 3, characterized in that: The second flow path, the third flow path and the fourth flow path are connected to the first branch through a distributor.

5. The outdoor heat exchanger according to claim 3, characterized in that: The third flow path includes a first sub-flow path and a second sub-flow path arranged in parallel, and the first sub-flow path and the second sub-flow path both flow through a portion of the heat exchange tube.

6. The outdoor heat exchanger according to claim 3, characterized in that: The fourth flow path includes a third sub-flow path and a fourth sub-flow path which are arranged in parallel, and the third sub-flow path and the fourth sub-flow path both flow through a portion of the heat exchange tube.

7. The outdoor heat exchanger according to claim 3, characterized in that: The outdoor heat exchanger has a first end and a second end opposite to each other, and in the direction from the first end to the second end, the heat exchange tubes of the first flow path, the heat exchange tubes of the second flow path, the heat exchange tubes of the third flow path and the heat exchange tubes of the fourth flow path are arranged in sequence.

8. The outdoor heat exchanger according to claim 1, characterized in that: The outdoor heat exchanger has a first end and a second end opposite to each other. The plurality of heat exchange tubes are arranged in a single row or in multiple rows. The plurality of heat exchange tubes in the same row are arranged in a direction from the first end to the second end.

9. An air conditioner outdoor unit, characterized in that: include: case; An electric control module, the electric control module is arranged in the housing and has a cooling flow path; According to the outdoor heat exchanger according to any one of claims 1 to 8, the outdoor heat exchanger is arranged in the shell, and the main inlet is connected to one end of the cooling flow path.

10. An air conditioner, characterized in that: Comprising the air conditioner outdoor unit according to claim 9.

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