Outdoor heat exchanger of air source heat pump

Abstract

The utility model relates to the technical field of air source heat pumps, in particular to an outdoor heat exchanger of an air source heat pump. The outdoor heat exchanger of the air source heat pump comprises a heat exchanger; the heat exchanger comprises a plurality of heat exchange pipes, the adjacent heat exchange pipes are arranged at intervals, one ends of the heat exchange pipes communicate with the heat exchanger, the other ends of the heat exchange pipes communicate with a distribution structure, and the heat exchange pipes comprise the first heat exchange pipe at the bottom and the second heat exchange pipe adjacent to the first heat exchange pipe; one end of the first heat exchange tube is communicated with the distribution structure, the other end of the first heat exchange tube is communicated with the second heat exchange tube, and the second heat exchange tube is communicated with the bottom of the heat exchanger. By communicating the first heat exchange pipe with the second heat exchange pipe, the resistance of the bottom of the heat exchanger can be reduced, the resistance borne by a refrigerant is reduced, the refrigerant can move to the bottom of the heat exchanger better and quickly, and the defrosting time of the bottom of the heat exchanger is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of air source heat pumps, in particular to an air source heat pump outdoor heat exchanger. Background Art

[0002] With the promotion of the coal-to-clean energy policy in the north in recent years, air source heat pumps are no longer limited to the southern hot water market and have been widely used in the northern heating market. Compared with traditional household air conditioners or water heaters, air source heat pumps require a greater heat load, so the heat exchanger is larger, and a multi-channel shunt design must be adopted to achieve sufficient heat exchange. In the existing shunt design, a distribution pipe assembly and a collection pipe assembly are used. The distribution pipe assembly in this structure consists of a distributor and a capillary tube, while the collection pipe assembly consists of a flute tube structure. The above structure can effectively ensure the uniformity of the outdoor heat exchanger when serving as an evaporator, improve the efficiency of the heat exchanger, and the flute tube structure can minimize gas resistance while saving costs and increasing production efficiency.

[0003] However, the above structure also has certain problems. During the heating process of the air source heat pump, a frost layer will form on the outer surface of the heat exchanger. The air source heat pump needs to defrost the heat exchanger after running for a certain period of time. During the defrosting process, the high-temperature and high-pressure refrigerant enters the heat exchanger through the collecting pipe assembly to melt the frost layer on the outer surface of the heat exchanger. The pipes close to the inlet of the collecting pipe assembly are more likely to enter with more refrigerant, while the pipes far away from the inlet of the collecting pipe assembly rarely enter with refrigerant. Because the heat exchanger is arranged longitudinally, the pipes close to the inlet of the collecting pipe assembly are The pipeline connected to the upper part of the heat exchanger and away from the inlet of the collecting pipe assembly is connected to the middle and lower parts of the heat exchanger. The refrigerant encounters greater resistance in the middle and lower parts of the heat exchanger, so the movement speed is slow. At the same time, the amount of refrigerant entering is also small, resulting in a slow defrosting speed. Therefore, it often happens that the frost layer on the upper part of the heat exchanger has melted, while the frost layer on the lower part has not melted yet. Since the refrigerant continues to enter the heat exchanger, the temperature of the upper part of the heat exchanger becomes higher and higher, and the pressure will also become higher and higher. The air source heat pump is prone to the problem of forced protection shutdown due to excessive system pressure during defrosting. Summary of the Invention

[0004] In view of this, the utility model provides an air source heat pump outdoor heat exchanger to solve the problem that the refrigerant encounters large resistance in the lower part of the heat exchanger, resulting in slow movement speed, slow defrosting speed, and forced protection shutdown due to excessive system pressure.

[0005] The utility model provides an air source heat pump outdoor heat exchanger, comprising:

[0006] heat exchangers;

[0007] Multiple heat exchange tubes are arranged at intervals between adjacent heat exchange tubes, one ends of the multiple heat exchange tubes are respectively connected to the heat exchanger, and the other ends of the multiple heat exchange tubes are connected to the distribution structure. The multiple heat exchange tubes include a first heat exchange tube at the bottom and a second heat exchange tube adjacent to the first heat exchange tube, one end of the first heat exchange tube and one end of the second heat exchange tube are respectively connected to the distribution structure, and the other end of the first heat exchange tube is connected to the other end of the second heat exchange tube and connected to the bottom of the heat exchanger.

[0008] In an optional embodiment, the method further includes:

[0009] A collecting pipe assembly includes a collecting main pipe and multiple collecting branch pipes arranged at intervals. The length of the collecting main pipe is less than the height of the heat exchanger. The distance between the top of the collecting main pipe and the top of the heat exchanger is the same as the distance between the bottom of the collecting main pipe and the bottom of the heat exchanger. One end of each of the multiple collecting branch pipes is connected to the collecting main pipe, and the other end of each of the multiple collecting branch pipes extends into the heat exchanger and is connected to the multiple heat exchange pipes in a one-to-one correspondence.

[0010] In an optional embodiment, the multiple collecting branch pipes include a first collecting branch pipe at the top, a second collecting branch pipe, a fifth collecting branch pipe, and a sixth collecting branch pipe at the bottom. The second collecting branch pipe is arranged on a side of the first collecting branch pipe close to the bottom of the collecting main pipe, and the fifth collecting branch pipe is arranged on a side of the sixth collecting branch pipe close to the top of the collecting main pipe. One end of the first collecting branch pipe is connected to the heat exchange pipe located at the top of the heat exchanger, and one end of the sixth collecting branch pipe is connected to the second heat exchange pipe located at the bottom of the heat exchanger. The first collecting branch pipe, the second collecting branch pipe, the fifth collecting pipe and the sixth collecting pipe have a first connecting end, a second connecting end, a fifth connecting end and a sixth connecting end connected to the collecting main pipe. The first connecting end is located on a side of the second connecting end close to the bottom of the collecting branch pipe, and the sixth connecting end is located on a side of the fifth connecting end close to the top of the collecting branch pipe.

[0011] In an optional embodiment, the plurality of summary branch pipes further include a third summary branch pipe and a fourth summary branch pipe, the third summary branch pipe being arranged on a side of the second summary branch pipe close to the bottom of the main summary pipe, and the fourth summary branch pipe being arranged on a side of the fifth summary branch pipe close to the top of the main summary pipe, the third summary branch pipe and the fourth summary branch pipe having a third connection end and a fourth connection end connected to the main summary pipe, the third connection end being located between the first connection end and the second connection end, and the fourth connection end being located between the fifth connection end and the sixth connection end.

[0012] In an optional embodiment, the distance between the first connection end and the third connection end is the same as the distance between the second connection end and the third connection end;

[0013] The distance between the sixth connection end and the fourth connection end is the same as the distance between the fifth connection end and the fourth connection end.

[0014] In an optional embodiment, the distance between the first connection end and the third connection end is smaller than the distance between the connection end of the third collecting branch pipe adjacent to the collecting branch pipe and the third connection end;

[0015] The distance between the sixth connection end and the fourth connection end is smaller than the distance between the connection end of the fourth collecting branch pipe adjacent to the collecting branch pipe and the fourth connection end.

[0016] In an optional embodiment, one ends of the multiple heat exchange tubes are evenly spaced apart in the heat exchanger, and one ends of the multiple collecting branch pipes connected to the heat exchange tubes are evenly spaced apart in the heat exchanger and are connected to the multiple heat exchange tubes one by one.

[0017] In an optional embodiment, a one-way valve is provided on the first heat exchange tube.

[0018] In an optional embodiment, the distribution structure is connected to the throttling component through a pipeline.

[0019] In an optional embodiment, the collecting main pipe is connected to the compressor through a four-way reversing valve and a pipeline.

[0020] Beneficial effects:

[0021] By connecting the first heat exchange tube with the second heat exchange tube, the resistance at the bottom of the heat exchanger can be reduced, so that the resistance to the refrigerant is reduced, and it can move to the bottom of the heat exchanger more quickly, reducing the defrosting time at the bottom of the heat exchanger, and preventing the temperature and pressure on the upper part of the heat exchanger from becoming higher and higher due to the slow defrosting speed, resulting in the system pressure being too high during defrosting and forced protection shutdown, causing the frost layer on the surface of the heat exchanger to be unable to fully melt. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1This is a schematic diagram of an air source heat pump outdoor heat exchanger according to an embodiment of the present utility model.

[0024] Description of reference numerals:

[0025] 1. Heat exchanger; 2. Distribution structure; 3. First heat exchange tube; 4. Second heat exchange tube; 5. Main pipe; 6. First branch pipe; 7. Second branch pipe; 8. Third branch pipe; 9. Fourth branch pipe; 10. Fifth branch pipe; 11. Sixth branch pipe; 12. One-way valve; 13. Throttle assembly; 14. Four-way reversing valve; 15. Compressor. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The following combination Figure 1 , describing the embodiments of the present utility model.

[0028] According to an embodiment of the present invention, an air source heat pump outdoor heat exchanger is provided, comprising: a heat exchanger 1 and a plurality of heat exchange tubes.

[0029] Specifically, adjacent heat exchange tubes are arranged at intervals, one end of multiple heat exchange tubes are respectively connected to the heat exchanger 1, and the other ends of multiple heat exchange tubes are connected to the distribution structure 2. The multiple heat exchange tubes include a first heat exchange tube 3 at the bottom and a second heat exchange tube 4 adjacent to the first heat exchange tube 3. One end of the first heat exchange tube 3 and one end of the second heat exchange tube 4 are respectively connected to the distribution structure 2, and the other end of the first heat exchange tube 3 is connected to the other end of the second heat exchange tube 4 and connected to the bottom of the heat exchanger 1.

[0030] Specifically, such as Figure 1 As shown, multiple heat exchange tubes are arranged on the left side of the heat exchanger 1, the right ends of the multiple heat exchange tubes extend into the heat exchanger 1, the left ends of the multiple heat exchange tubes are connected with the distribution structure 2, the upper side of the multiple heat exchange tubes is the top, and the lower side of the multiple heat exchange tubes is the bottom. The first heat exchange tube 3 is located at the bottom of the multiple heat exchange tubes, and the second heat exchange tube 4 is arranged on the upper side of the first heat exchange tube 3. The left end of the first heat exchange tube 3 is connected with the distribution structure 2, and the left end of the second heat exchange tube 4 is connected with the distribution structure 2. The right end of the first heat exchange tube 3 is connected with the right end of the second heat exchange tube 4 and is connected with the bottom of the heat exchanger 1. After the refrigerant at the bottom of the heat exchanger 1 enters the second heat exchange tube 4, a part of the refrigerant will enter the first heat exchange tube 3 and flow from the first heat exchange tube 3 to the distribution structure 2.

[0031] In this embodiment, fifteen heat exchange tubes are provided on the left side of heat exchanger 1. Refrigerant after heat exchange in heat exchanger 1 flows through these tubes to distribution structure 2. From there, it flows back to compressor 15 for reheating before entering heat exchanger 1 for defrosting. The right end of first heat exchange tube 3 is connected to the right end of second heat exchange tube 4 and to the bottom of heat exchanger 1 via a forked tee.

[0032] Preferably, the heat exchange tube is a capillary tube.

[0033] In other embodiments, fourteen or sixteen heat exchange tubes may be provided on the left side of the heat exchanger 1 . The number of heat exchange tubes may be determined according to the longitudinal dimension of the heat exchanger 1 and the intervals between the heat exchange tubes.

[0034] It should be noted that by connecting the first heat exchange tube 3 with the second heat exchange tube 4, the resistance at the bottom of the heat exchanger 1 can be reduced, so that the resistance to the refrigerant is reduced, and it can move to the bottom of the heat exchanger 1 more quickly, reducing the defrosting time at the bottom of the heat exchanger 1, and preventing the temperature and pressure on the upper part of the heat exchanger 1 from becoming increasingly higher due to the slow defrosting speed, resulting in the system pressure being too high during defrosting and forced protection shutdown, causing the frost layer on the surface of the heat exchanger 1 to be unable to fully melt.

[0035] In some embodiments, the system further includes a manifold assembly. The manifold assembly includes a manifold main pipe 5 and a plurality of spaced-apart manifold branches. The manifold main pipe 5 is shorter than the height of the heat exchanger 1, and the distance between the top of the manifold main pipe 5 and the top of the heat exchanger 1 is the same as the distance between the bottom of the manifold main pipe 5 and the bottom of the heat exchanger 1. One end of each of the plurality of branch manifolds is connected to the manifold main pipe 5, and the other ends of each of the plurality of branch manifolds extend into the heat exchanger 1 and communicate with the plurality of heat exchange tubes in a one-to-one correspondence.

[0036] Specifically, such as Figure 1 As shown, a collecting main pipe 5 and a plurality of collecting branch pipes arranged at intervals are provided on the right side of the heat exchanger 1. The right ends of the plurality of collecting branch pipes are connected to the collecting main pipe 5, and the left ends of the plurality of collecting branch pipes extend into the heat exchanger 1 and are connected one-to-one with the right ends of the plurality of heat exchange tubes. The upper end of the collecting main pipe 5 is connected to the compressor 15 through a pipeline, and the high-temperature and high-pressure refrigerant enters the collecting main pipe 5 through the pipeline. The collecting main pipe 5 distributes the refrigerant to the plurality of collecting branch pipes. The refrigerant enters the heat exchanger 1 through the collecting branch pipe for heat exchange and defrosting, and then enters the heat exchange tube and flows out of the heat exchanger 1.

[0037] In this embodiment, fourteen converging branch pipes are provided on the right side of heat exchanger 1, with the left ends of these fourteen converging branch pipes connected to the right ends of the fourteen heat exchange tubes. The length of the converging branch pipe 5 is shorter than the height of the heat exchanger 1, effectively reducing the travel time of the refrigerant within the converging branch pipe 5 and reducing the distance between the inlet of the top and bottom converging branch pipes, thereby improving the rationality of refrigerant distribution.

[0038] In some embodiments, the plurality of collecting branch pipes include a first collecting branch pipe 6, a second collecting branch pipe 7, a fifth collecting branch pipe 10 at the top, and a sixth collecting branch pipe 11 at the bottom. The second collecting branch pipe 7 is arranged on a side of the first collecting branch pipe 6 close to the bottom of the main collecting pipe 5, and the fifth collecting branch pipe 10 is arranged on a side of the sixth collecting branch pipe 11 close to the top of the main collecting pipe 5. One end of the first collecting branch pipe 6 is connected to the heat exchange pipe located at the top of the heat exchanger 1, and one end of the sixth collecting branch pipe 11 is connected to the second heat exchange pipe 4 located at the bottom of the heat exchanger 1. The first collecting branch pipe 6, the second collecting branch pipe 7, the fifth collecting branch pipe 10 and the sixth collecting branch pipe 11 have a first connecting end, a second connecting end, a fifth connecting end and a sixth connecting end connected to the main collecting pipe 5. The first connecting end is located on a side of the second connecting end close to the bottom of the collecting pipe, and the sixth connecting end is located on a side of the fifth connecting end close to the top of the collecting pipe.

[0039] In this embodiment, if Figure 1 As shown, multiple collecting branch pipes include a first collecting branch pipe 6, a second collecting branch pipe 7, a fifth collecting branch pipe 10 at the top, and a sixth collecting branch pipe 11 at the bottom. The left ends of the first collecting branch pipe 6, the second collecting branch pipe 7, and the fifth collecting branch pipe 10 are respectively connected to the heat exchange pipes, and the left end of the sixth collecting branch pipe 11 is connected to the fork-shaped tee pipe. The right ends of the first collecting branch pipe 6, the second collecting branch pipe 7, the fifth collecting branch pipe 10, and the sixth collecting branch pipe 11 are respectively the first connecting end, the second connecting end, the fifth connecting end, and the sixth connecting end. The first connecting end is arranged on the lower side of the second connecting end, and the sixth connecting end is arranged on the upper side of the fifth connecting end.

[0040] It should be noted that by setting the first connection end at the lower side of the second connection end and the sixth connection end at the upper side of the fifth connection end, the amount of refrigerant entering the first summary branch pipe 6 through the first connection end in the summary main pipe 5 can be effectively reduced, and the sixth connection end is placed close to the inlet of the summary main pipe 5, thereby increasing the amount of refrigerant entering the sixth summary branch pipe 11 through the sixth connection end, thereby increasing the defrost speed at the bottom of the heat exchanger 1 and slowing down the defrost speed at the top of the heat exchanger 1.

[0041] Specifically, such as Figure 1 As shown, the multiple summarizing branch pipes further include a third summarizing branch pipe 8 and a fourth summarizing branch pipe 9. The third summarizing branch pipe 8 is arranged on a side of the second summarizing branch pipe 7 close to the bottom of the main summarizing pipe 5, and the fourth summarizing branch pipe 9 is arranged on a side of the fifth summarizing branch pipe 10 close to the top of the main summarizing pipe 5. The third summarizing branch pipe 8 and the fourth summarizing branch pipe 9 have a third connecting end and a fourth connecting end connected to the main summarizing pipe 5. The third connecting end is located between the first connecting end and the second connecting end, and the fourth connecting end is located between the fifth connecting end and the sixth connecting end.

[0042] In this embodiment, the left and right ends of the third summarizing branch pipe 8 are respectively located below the left and right ends of the second summarizing branch pipe 7, the left and right ends of the fourth summarizing branch pipe 9 are respectively located above the left and right ends of the fifth summarizing branch pipe 10, the first connecting end is located below the third connecting end, the third connecting end is arranged between the first connecting end and the second connecting end, the sixth connecting end is located above the fourth connecting end, and the fourth connecting end is arranged between the sixth connecting end and the fifth connecting end.

[0043] In this embodiment, if Figure 1 As shown, the distance between the first connection end and the third connection end is the same as the distance between the second connection end and the third connection end; the distance between the sixth connection end and the fourth connection end is the same as the distance between the fifth connection end and the fourth connection end.

[0044] In this embodiment, if Figure 1 As shown, the distance between the first connection end and the third connection end is smaller than the distance between the connection end of the adjacent summary branch of the third summary branch 8 and the third connection end; the distance between the sixth connection end and the fourth connection end is smaller than the distance between the connection end of the adjacent summary branch of the fourth summary branch 9 and the fourth connection end.

[0045] Specifically, the distance between the first connection end and the third connection end is smaller than the distance between the connection end of the lower side of the third summary branch pipe 8 and the third connection end, and the distance between the sixth connection end and the fourth connection end is smaller than the distance between the connection end of the upper side of the fourth summary branch pipe 9 and the fourth connection end. By reducing the distance between the first connection end and the third connection end, the distance between the third connection end and the second connection end, the distance between the sixth connection end and the fourth connection end, and the distance between the fourth connection end and the fifth connection end, the rationality of the refrigerant distribution is improved and the distribution is made more uniform.

[0046] In some embodiments, one end of multiple heat exchange tubes is evenly spaced apart in the heat exchanger 1, and one end of multiple collecting branch pipes connected to the heat exchange tubes is evenly spaced apart in the heat exchanger 1 and communicates with the multiple heat exchange tubes one by one.

[0047] In this embodiment, if Figure 1 As shown, the right ends of multiple heat exchange tubes are evenly spaced in the heat exchanger 1, and the spacing between adjacent heat exchange tubes is the same. The left ends of multiple summary branch pipes are evenly spaced in the heat exchanger 1, and the spacing between the left ends of adjacent summary branch pipes is the same.

[0048] In this embodiment, if Figure 1 As shown, a one-way valve 12 is provided on the first heat exchange tube 3. During the defrosting process, the one-way valve 12 is opened to allow the refrigerant to enter the first heat exchange tube 3. During the heating process, the one-way valve 12 is closed to seal the first heat exchange tube 3 and prevent the refrigerant from entering the first heat exchange tube 3. This would prevent excessive flow at the bottom of the heat exchanger 1 from affecting the heat exchange effect.

[0049] In this embodiment, if Figure 1 As shown, the distribution structure 2 is connected to the throttling component 13 through a pipeline, and the right side of the throttling component 13 is connected to the floor heating heat exchanger 1.

[0050] In this embodiment, if Figure 1 As shown, the collecting main pipe 5 is connected to the compressor 15 through a four-way reversing valve 14 and a pipeline. The floor heating heat exchanger 1 is connected to the compressor 15 through a four-way reversing valve 14 and a pipeline.

[0051] Specifically, in the defrost state, the compressor 15 transports the high-temperature and high-pressure refrigerant through the four-way reversing valve 14 and the pipeline to the collecting main pipe 5 and enters the heat exchanger 1. After the heat exchange is completed, the refrigerant passes through the heat exchange pipe, the distribution structure 2, the throttling component 13, the floor heating heat exchanger 1 and the four-way reversing valve 14 in turn and enters the compressor 15.

[0052] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. An air source heat pump outdoor heat exchanger, characterized in that: include: Heat exchanger (1); A plurality of heat exchange tubes are provided, and adjacent heat exchange tubes are spaced apart. One end of each of the plurality of heat exchange tubes is connected to the heat exchanger (1), and the other end of each of the plurality of heat exchange tubes is connected to the distribution structure (2). The plurality of heat exchange tubes include a first heat exchange tube (3) at the bottom and a second heat exchange tube (4) adjacent to the first heat exchange tube (3). One end of the first heat exchange tube (3) and one end of the second heat exchange tube (4) are connected to the distribution structure (2), respectively. The other end of the first heat exchange tube (3) is connected to the other end of the second heat exchange tube (4) and is connected to the bottom of the heat exchanger (1).

2. The air source heat pump outdoor heat exchanger according to claim 1, characterized in that: Also includes: A collecting pipe assembly comprises a collecting main pipe (5) and a plurality of collecting branch pipes arranged at intervals, wherein the length of the collecting main pipe (5) is less than the height of the heat exchanger (1), the distance between the top of the collecting main pipe (5) and the top of the heat exchanger (1) is the same as the distance between the bottom of the collecting main pipe (5) and the bottom of the heat exchanger (1), one end of each of the plurality of collecting branch pipes is connected to the collecting main pipe (5), and the other end of each of the plurality of collecting branch pipes extends into the heat exchanger (1) and is connected to each of the plurality of heat exchange pipes in a one-to-one correspondence.

3. The air source heat pump outdoor heat exchanger according to claim 2, characterized in that: The plurality of collecting branch pipes include a first collecting branch pipe (6) at the top, a second collecting branch pipe (7), a fifth collecting branch pipe (10), and a sixth collecting branch pipe (11) at the bottom. The second collecting branch pipe (7) is arranged on a side of the first collecting branch pipe (6) close to the bottom of the collecting main pipe (5), and the fifth collecting branch pipe (10) is arranged on a side of the sixth collecting branch pipe (11) close to the top of the collecting main pipe (5). One end of the first collecting branch pipe (6) is communicated with the heat exchange pipe located at the top of the heat exchanger (1), and one end of the sixth collecting branch pipe (11) is communicated with the second heat exchange pipe (4) located at the bottom of the heat exchanger (1). The first collecting branch pipe (6), the second collecting branch pipe (7), the fifth collecting branch pipe (10), and the sixth collecting branch pipe (11) have a first connection end, a second connection end, a fifth connection end, and a sixth connection end connected to the collecting main pipe (5). The first connection end is located on a side of the second connection end close to the bottom of the collecting branch pipe, and the sixth connection end is located on a side of the fifth connection end close to the top of the collecting branch pipe.

4. The air source heat pump outdoor heat exchanger according to claim 3, characterized in that: The plurality of summary branch pipes further include a third summary branch pipe (8) and a fourth summary branch pipe (9), wherein the third summary branch pipe (8) is arranged on a side of the second summary branch pipe (7) close to the bottom of the summary main pipe (5), and the fourth summary branch pipe (9) is arranged on a side of the fifth summary branch pipe (10) close to the top of the summary main pipe (5), and the third summary branch pipe (8) and the fourth summary branch pipe (9) have a third connection end and a fourth connection end connected to the summary main pipe (5), wherein the third connection end is located between the first connection end and the second connection end, and the fourth connection end is located between the fifth connection end and the sixth connection end.

5. The air source heat pump outdoor heat exchanger according to claim 4, characterized in that: The distance between the first connection end and the third connection end is the same as the distance between the second connection end and the third connection end; The distance between the sixth connection end and the fourth connection end is the same as the distance between the fifth connection end and the fourth connection end.

6. The air source heat pump outdoor heat exchanger according to claim 5, characterized in that: The distance between the first connection end and the third connection end is smaller than the distance between the connection end of the third collecting branch pipe (8) adjacent to the collecting branch pipe and the third connection end; The distance between the sixth connection end and the fourth connection end is smaller than the distance between the connection end of the fourth collecting branch pipe (9) adjacent to the collecting branch pipe and the fourth connection end.

7. The air source heat pump outdoor heat exchanger according to claim 3, characterized in that: One ends of the plurality of heat exchange tubes are evenly spaced apart and arranged in the heat exchanger (1); one ends of the plurality of collecting branch pipes connected to the heat exchange tubes are evenly spaced apart and arranged in the heat exchanger (1) and communicate with the plurality of heat exchange tubes in a one-to-one correspondence.

8. The air source heat pump outdoor heat exchanger according to any one of claims 1 to 7, characterized in that: A one-way valve (12) is provided on the first heat exchange tube (3).

9. The air source heat pump outdoor heat exchanger according to claim 8, characterized in that: The distribution structure (2) is connected to the throttling component (13) through a pipeline.

10. The air source heat pump outdoor heat exchanger according to claim 2, characterized in that: The collecting main pipe (5) is connected to the compressor (15) through a four-way reversing valve (14) and a pipeline.

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