Heat pump system

Abstract

The present application relates to the technical field of heat pump, and particularly relates to a heat pump system. The heat pump system comprises a compressor, a condenser, a rectifier bridge circuit and a fin evaporator. The rectifier bridge circuit has a first flow passage, a second flow passage, a third flow passage and a fourth flow passage. A first one-way valve is arranged between the first flow passage and the second flow passage, a second one-way valve is arranged between the second flow passage and the third flow passage, a third one-way valve is arranged between the third flow passage and the fourth flow passage, and a fourth one-way valve is arranged between the fourth flow passage and the first flow passage. The second flow passage is communicated with an inlet end of a fin flow path in the fin evaporator, and the fourth flow passage is communicated with an outlet end of the fin flow path in the fin evaporator. One end of the condenser is communicated with the first flow passage, and the other end is communicated with the compressor; and the third flow passage is communicated with the compressor. The heat pump system can improve defrosting efficiency, improve defrosting effect, save energy consumption, and achieve the purpose of saving cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat pump, in particular to a heat pump system. BACKGROUND

[0002] Generally, in the working process of the heat pump system, the gas-liquid mixed refrigerant just entering the finned evaporator evaporates and then phase changes, thereby absorbing a large amount of heat, and then causing the frost to be seriously accumulated at the inlet end of the finned evaporator flow path. Along the flow direction of the refrigerant (the direction from the inlet end to the outlet end of the finned evaporator flow path), the refrigerant evaporates more completely, so that the heat exchange load of the finned evaporator is reduced, and then the frost at the outlet end of the finned evaporator flow path is less accumulated.

[0003] The heat pump system in the prior art usually adopts a refrigerant reverse cycle defrosting, and the finned evaporator is changed into a condenser to melt the frost on the fin surface. Specifically, the refrigerant enters the finned evaporator from the gas collecting pipe of the fin, and then condenses and releases heat to defrost. Since the gas collecting pipe is located at the outlet end of the finned evaporator flow path, the high-temperature refrigerant entering the finned evaporator first exchanges heat with the fin end with less frost, and when the refrigerant flows to the inlet end of the finned evaporator flow path with serious frost, the temperature of the refrigerant has been greatly reduced, so that the remaining high-temperature and high-pressure refrigerant is not enough to remove the frost at the inlet end, thereby reducing the defrosting efficiency, affecting the defrosting effect, and increasing the energy consumption of the heat pump system. At the same time, this refrigerant reverse defrosting method also causes a large amount of refrigerant to condense and liquefy in the finned evaporator flow path, thereby occupying the heat exchange area of the finned evaporator, reducing the heat exchange efficiency, and then affecting the defrosting effect.

[0004] Therefore, it is urgent to design a heat pump system to solve the above technical problems. SUMMARY

[0005] The purpose of the present application is to provide a heat pump system to improve the defrosting efficiency, improve the defrosting effect, save energy consumption, and save cost.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The present application provides a heat pump system, comprising a compressor, a condenser, a rectifier bridge circuit and a finned evaporator; wherein the rectifier bridge circuit has a first flow passage, a second flow passage, a third flow passage and a fourth flow passage;

[0008] A first one-way valve is arranged between the first flow passage and the second flow passage, so that the refrigerant can flow from the first flow passage to the second flow passage through the first one-way valve;

[0009] A second one-way valve is arranged between the second flow port and the third flow port to enable the refrigerant to flow from the third flow port to the second flow port through the second one-way valve;

[0010] A third one-way valve is arranged between the third flow port and the fourth flow port to enable the refrigerant to flow from the fourth flow port to the third flow port through the third one-way valve;

[0011] A fourth one-way valve is arranged between the fourth flow port and the first flow port to enable the refrigerant to flow from the fourth flow port to the first flow port through the fourth one-way valve;

[0012] The second flow port is in communication with the inlet end of the fin flow path in the fin evaporator, and the fourth flow port is in communication with the outlet end of the fin flow path in the fin evaporator, so that the refrigerant can flow from the second flow port to the inlet end of the fin flow path and then flow from the outlet end of the fin flow path to the fourth flow port;

[0013] One end of the condenser is in communication with the first flow port, and the other end is in communication with the compressor; and the third flow port is in communication with the compressor.

[0014] As an optional technical solution of the heat pump system, the fin flow path is provided in plurality, and the fin flow path is arranged in one-to-one correspondence with the capillary tube, one end of the capillary tube is in communication with the flow divider, and the other end of the capillary tube is in communication with the inlet end of the fin flow path.

[0015] As an optional technical solution of the heat pump system, a gas collecting pipe is arranged on the fin evaporator, one end of the gas collecting pipe is in communication with the outlet end of the fin flow path, and the other end of the gas collecting pipe is in communication with the fourth flow port.

[0016] As an optional technical solution of the heat pump system, the gas collecting pipe has one gas outlet and multiple gas inlets, the gas inlets are arranged in one-to-one correspondence with the fin flow paths, the gas inlets are in communication with the outlet ends of the fin flow paths, and the gas outlet is in communication with the fourth flow port.

[0017] As an optional technical solution of the heat pump system, the multiple gas inlets are arranged at equal intervals.

[0018] As an optional technical solution of the heat pump system, the heat pump system has a heating mode;

[0019] When the heat pump system is in the heating mode, the first one-way valve and the third one-way valve are both opened, and the second one-way valve and the fourth one-way valve are both closed, so that the first flow port is in communication with the second flow port, and the third flow port is in communication with the fourth flow port.

[0020] As an optional technical solution of the heat pump system, the heat pump system has a refrigeration mode;

[0021] When the heat pump system is in the refrigeration mode, the first one-way valve and the third one-way valve are both closed, and the second one-way valve and the fourth one-way valve are both opened, so that the second flow passage and the third flow passage are communicated, and the fourth flow passage and the first flow passage are communicated.

[0022] As an optional technical solution of the heat pump system, the heat pump system further comprises a four-way valve, the four-way valve has a port a, a port b, a port c and a port d, the compressor has a jet port and a suction port, the port a is communicated with the jet port, the port b is communicated with the condenser, the port c is communicated with the suction port, and the port d is communicated with the third flow passage.

[0023] As an optional technical solution of the heat pump system, when the heat pump system is in the heating mode, the port a and the port b are communicated, and the port c and the port d are communicated; when the heat pump system is in the refrigeration mode, the port a and the port d are communicated, and the port b and the port c are communicated.

[0024] As an optional technical solution of the heat pump system, an expansion valve is further arranged between the condenser and the first flow passage, and the expansion valve is configured to throttle and depressurize the refrigerant.

[0025] The beneficial effects of the present application at least include:

[0026] The present application provides a heat pump system, which comprises a compressor, a condenser, a rectifier bridge circuit and a fin evaporator; wherein the rectifier bridge circuit has a first flow passage, a second flow passage, a third flow passage and a fourth flow passage. A first one-way valve is arranged between the first flow passage and the second flow passage, so that the refrigerant can flow from the first flow passage to the second flow passage through the first one-way valve; a second one-way valve is arranged between the second flow passage and the third flow passage, so that the refrigerant can flow from the third flow passage to the second flow passage through the second one-way valve; a third one-way valve is arranged between the third flow passage and the fourth flow passage, so that the refrigerant can flow from the fourth flow passage to the third flow passage through the third one-way valve; and a fourth one-way valve is arranged between the fourth flow passage and the first flow passage, so that the refrigerant can flow from the fourth flow passage to the first flow passage through the fourth one-way valve. The second flow passage is communicated with an inlet end of a fin flow path in the fin evaporator, and the fourth flow passage is communicated with an outlet end of the fin flow path in the fin evaporator; so that the refrigerant can flow from the second flow passage to the inlet end of the fin flow path, and then flow from the outlet end of the fin flow path to the fourth flow passage. One end of the condenser is communicated with the first flow passage, and the other end is communicated with the compressor; and the third flow passage is communicated with the compressor.

[0027] Above, when the heat pump system is working normally, the refrigerant can flow into the inlet end of the fin flow path through the second flow-through port on the rectifier bridge, then the refrigerant exchanges heat with the fin flow path, so that the frost on the fin flow path melts, then the refrigerant flows to the fourth flow-through port of the rectifier bridge through the outlet end of the fin flow path, and finally flows back to the compressor. Since the frost degree at the inlet end of the fin flow path is more serious than that at the outlet end in actual application, the positive circulation defrosting of the refrigerant in the fin evaporator is realized by the design of the rectifier bridge in the application, that is, the high-temperature and high-pressure refrigerant flows from the place with serious frost to the place with slight frost, which can provide higher-temperature refrigerant to the place with serious frost, reduce the temperature difference between the refrigerant and the cooling liquid at the place with slight frost, realize reasonable distribution of heat in a single fin flow path, thereby improving the defrosting efficiency, improving the defrosting effect, saving energy consumption, and saving cost.

[0028] In addition, the defrosting mode of the positive flow of the refrigerant can improve the defrosting effect of the place with serious frost in the fin evaporator and improve the defrosting efficiency. The technical problem that a large amount of refrigerant condenses and liquefies to occupy the heat exchange area of the fin evaporator due to the reverse flow of the refrigerant in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0030] Figure 1 is a schematic diagram of the heat pump system provided by the embodiments of the present application;

[0031] Figure 2 is a schematic diagram of the heat pump system provided by the embodiments of the present application in a heating mode;

[0032] Figure 3 is a schematic diagram of the heat pump system provided by the embodiments of the present application in a cooling mode.

[0033] REFERENCE NUMERALS

[0034] 100, compressor; 110, jet port; 120, suction port;

[0035] 200, condenser;

[0036] 300, rectifier bridge; 310, first flow port; 320, second flow port; 330, third flow port; 340, fourth flow port; 350, first one-way valve; 360, second one-way valve; 370, third one-way valve; 380, fourth one-way valve;

[0037] 400, finned evaporator; 410, gas collector; 420, gas outlet; 430, gas inlet;

[0038] 500, flow splitter; 600, capillary tube;

[0039] 700, four-way valve;

[0040] 800, expansion valve. DETAILED DESCRIPTION

[0041] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0043] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0045] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0047] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0048] The present embodiment provides a heat pump system, which can improve defrosting efficiency, improve defrosting effect, save energy consumption and save cost.

[0049] As Figures 1-3As shown, the heat pump system mainly comprises a compressor 100, a condenser 200, a rectifier bridge circuit 300 and a finned evaporator 400; wherein the rectifier bridge circuit 300 has a first flow port 310, a second flow port 320, a third flow port 330 and a fourth flow port 340. A first one-way valve 350 is arranged between the first flow port 310 and the second flow port 320, so that the refrigerant can flow from the first flow port 310 to the second flow port 320 through the first one-way valve 350; a second one-way valve 360 is arranged between the second flow port 320 and the third flow port 330, so that the refrigerant can flow from the third flow port 330 to the second flow port 320 through the second one-way valve 360; a third one-way valve 370 is arranged between the third flow port 330 and the fourth flow port 340, so that the refrigerant can flow from the fourth flow port 340 to the third flow port 330 through the third one-way valve 370; a fourth one-way valve 380 is arranged between the fourth flow port 340 and the first flow port 310, so that the refrigerant can flow from the fourth flow port 340 to the first flow port 310 through the fourth one-way valve 380. The second flow port 320 is in communication with the inlet end of the finned flow path in the finned evaporator 400, and the fourth flow port 340 is in communication with the outlet end of the finned flow path in the finned evaporator 400; so that the refrigerant can flow from the second flow port 320 to the inlet end of the finned flow path, and then flow from the outlet end of the finned flow path to the fourth flow port 340. One end of the condenser 200 is in communication with the first flow port 310, and the other end is in communication with the compressor 100; and the third flow port 330 is in communication with the compressor 100.

[0050] Based on the above design, when the heat pump system in the embodiment is working normally, the refrigerant can flow into the inlet end of the finned flow path through the second flow port 320 on the rectifier bridge circuit 300, then the refrigerant exchanges heat with the finned flow path, so that the frost on the finned flow path melts, then the refrigerant flows to the fourth flow port 340 of the rectifier bridge circuit 300 through the outlet end of the finned flow path, and finally flows back to the compressor 100. Since the frost degree at the inlet end of the finned flow path is more serious than that at the outlet end in actual application, the design of the rectifier bridge circuit 300 in the embodiment realizes the forward circulation defrosting of the refrigerant in the finned evaporator 400, that is, the high-temperature and high-pressure refrigerant flows from the place with serious frost to the place with slight frost, which can provide higher-temperature refrigerant to the place with serious frost, reduce the temperature difference between the refrigerant and the cooling liquid at the place with slight frost, realize the reasonable distribution of heat of a single finned flow path, thereby improving the defrosting efficiency, improving the defrosting effect, saving energy consumption and saving cost.

[0051] In addition, the forward flow defrosting mode of the refrigerant can improve the defrosting effect of the place with serious frost in the finned evaporator 400 and improve the defrosting efficiency. The technical problem that a large amount of refrigerant condenses and liquefies to occupy the heat exchange area of the finned evaporator 400 due to the reverse flow of the refrigerant in the prior art is solved.

[0052] As Figure 1 shown in the embodiment, the heat pump system comprises a flow divider 500 and a plurality of capillary tubes 600, the fin flow paths are provided in plurality, and the fin flow paths are provided in one-to-one correspondence with the capillary tubes 600, one end of the capillary tube 600 is in communication with the flow divider 500, and the other end of the capillary tube 600 is in communication with the inlet end of the fin flow path.

[0053] The uniformity of the distribution of the refrigerant can be improved by the provision of the flow divider 500, and the refrigerant flow into each capillary tube 600 is ensured to be as uniform as possible, thereby improving the uniformity of defrosting of the fin evaporator 400 and improving the defrosting effect.

[0054] It should be noted that the flow divider 500 in the embodiment uniformly distributes the refrigerant to each capillary tube 600 through a controller in the external environment, and ensures that the refrigerant flow in each capillary tube 600 is as uniform as possible. The working principle of the controller for controlling the flow divider 500 to uniformly distribute the refrigerant belongs to conventional technology, and will not be described in detail here.

[0055] As Figure 1 shown in the embodiment, the fin evaporator 400 in the embodiment is provided with a gas collecting pipe 410, one end of the gas collecting pipe 410 is in communication with the outlet end of the fin flow path, and the other end is in communication with the fourth flow passage 340.

[0056] Specifically, the gas collecting pipe 410 has one gas outlet 420 and a plurality of gas inlets 430, the gas inlets 430 are provided in one-to-one correspondence with the fin flow paths, the gas inlets 430 are in communication with the outlet end of the fin flow path, and the gas outlet 420 is in communication with the fourth flow passage 340. In this way, the refrigerant after defrosting in each fin flow path flows out from the respective corresponding gas inlets 430 and is finally collected and discharged from the gas outlet 420 to the fourth flow passage 340. This simplifies the structure of the gas collecting pipe 410, makes the gas collecting pipe 410 simple and compact in structure, facilitates assembly, reduces the volume of the heat pump system, and improves the integration.

[0057] Optionally, the plurality of gas inlets 430 in the embodiment are arranged at equal intervals, thereby improving the defrosting uniformity of the fin evaporator 400 and improving the defrosting effect.

[0058] As Figures 2-3 shown in the embodiment, the heat pump system in the embodiment has a heating mode and a cooling mode.

[0059] As Figures 2-3As shown, the heat pump system in the embodiment further comprises a four-way valve 700 having a port a, a port b, a port c and a port d, the compressor 100 having a jet port 110 and a suction port 120, the port a being in communication with the jet port 110, the port b being in communication with the condenser 200, the port c being in communication with the suction port 120, and the port d being in communication with the third flow port 330. When the heat pump system is in the heating mode, the port a is in communication with the port b, and the port c is in communication with the port d; when the heat pump system is in the cooling mode, the port a is in communication with the port d, and the port b is in communication with the port c.

[0060] Specifically, when the heat pump system is in the heating mode, the first one-way valve 350 and the third one-way valve 370 are both opened, and the second one-way valve 360 and the fourth one-way valve 380 are both closed, so as to make the first flow port 310 in communication with the second flow port 320, and the third flow port 330 in communication with the fourth flow port 340. Figure 2 The dashed line in the figure indicates that the second one-way valve 360 and the fourth one-way valve 380 are both in the closed state.

[0061] In the heating mode, the refrigerant jetted from the jet port 110 of the compressor 100 flows to the condenser 200 through the port a and the port b of the four-way valve 700, and then the refrigerant flowing through the condenser 200 successively flows through the first flow port 310 and the second flow port 320 of the rectifier bridge circuit 300, and then flows to the respective corresponding capillary tubes 600 through the flow divider head 500, and finally flows into the fin flow path of the fin evaporator 400, and the refrigerant after heat exchange and defrosting flows out of the gas outlet 420 of the gas collecting pipe 410 successively to the fourth flow port 340 and the third flow port 330 of the rectifier bridge circuit 300, and then successively flows to the port c and the port d of the four-way valve 700, and finally flows back to the suction port 120 of the compressor 100.

[0062] When the heat pump system is in the cooling mode, the first one-way valve 350 and the third one-way valve 370 are both closed, and the second one-way valve 360 and the fourth one-way valve 380 are both opened, so as to make the second flow port 320 in communication with the third flow port 330, and the fourth flow port 340 in communication with the first flow port 310. Figure 3 The dashed line in the figure indicates that the first one-way valve 350 and the third one-way valve 370 are both in the closed state.

[0063] In cooling mode, the refrigerant injected by the nozzle 110 of the compressor 100 flows sequentially through ports a and d of the four-way valve 700 into the third flow port 330 and the second flow port 320 of the rectifier bridge circuit 300. Then, it flows through the distributor head 500 to its corresponding capillary tube 600, and finally flows into the finned flow path of the finned evaporator 400. After heat exchange and defrosting, the refrigerant flows sequentially through the outlet 420 of the gas collecting pipe 410 to the fourth flow port 340 and the first flow port 310 of the rectifier bridge circuit 300, and then flows into the condenser 200. After heat exchange in the condenser 200, the refrigerant flows sequentially through ports b and c of the four-way valve 700, and finally flows back to the suction port 120 of the compressor 100.

[0064] In summary, regardless of whether the heat pump system is in heating or cooling mode, the rectifier bridge 300 ensures that the refrigerant flowing through the finned evaporator 400 enters through the distributor head 500 and exits through the gas collector 410. In other words, the refrigerant flows from the inlet end (where frost is severe) of the finned flow path to the outlet end (where frost is less severe), thereby improving defrosting efficiency, enhancing defrosting effect, saving energy, and reducing costs.

[0065] like Figures 1-3 As shown, in this embodiment, an expansion valve 800 is also provided between the condenser 200 and the first flow port 310. The expansion valve 800 is configured to throttle and reduce the pressure of the refrigerant. In this embodiment, multiple expansion valves 800 can be provided, and the type of expansion valve 800 is not limited.

[0066] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0067] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A heat pump system, characterized by, The heat pump system comprises a compressor (100), a condenser (200), a rectifier bridge circuit (300) and a fin evaporator (400); wherein the rectifier bridge circuit (300) has a first flow passage (310), a second flow passage (320), a third flow passage (330) and a fourth flow passage (340); A first one-way valve (350) is arranged between the first flow passage (310) and the second flow passage (320) to enable the refrigerant to flow from the first flow passage (310) to the second flow passage (320) through the first one-way valve (350); A second one-way valve (360) is arranged between the second flow passage (320) and the third flow passage (330) to enable the refrigerant to flow from the third flow passage (330) to the second flow passage (320) through the second one-way valve (360); A third one-way valve (370) is arranged between the third flow passage (330) and the fourth flow passage (340) to enable the refrigerant to flow from the fourth flow passage (340) to the third flow passage (330) through the third one-way valve (370); A fourth one-way valve (380) is arranged between the fourth flow passage (340) and the first flow passage (310) to enable the refrigerant to flow from the fourth flow passage (340) to the first flow passage (310) through the fourth one-way valve (380); The second flow passage (320) is in communication with the inlet end of the fin flow path in the fin evaporator (400), and the fourth flow passage (340) is in communication with the outlet end of the fin flow path in the fin evaporator (400); so that the refrigerant can flow from the second flow passage (320) to the inlet end of the fin flow path, and then flow from the outlet end of the fin flow path to the fourth flow passage (340); One end of the condenser (200) is in communication with the first flow passage (310), and the other end is in communication with the compressor (100); and the third flow passage (330) is in communication with the compressor (100); The heat pump system comprises a flow dividing head (500) and a plurality of capillary tubes (600), the fin flow path is provided in plurality, and the fin flow path is provided in one-to-one correspondence with the capillary tube (600), one end of the capillary tube (600) is in communication with the flow dividing head (500), and the other end of the capillary tube (600) is in communication with the inlet end of the fin flow path; The heat pump system has a heating mode; when the heat pump system is in the heating mode, the first one-way valve (350) and the third one-way valve (370) are both opened, and the second one-way valve (360) and the fourth one-way valve (380) are both closed, so that the first flow passage (310) is in communication with the second flow passage (320), and the third flow passage (330) is in communication with the fourth flow passage (340); The heat pump system has a refrigeration mode; when the heat pump system is in the refrigeration mode, the first one-way valve (350) and the third one-way valve (370) are both closed, the second one-way valve (360) and the fourth one-way valve (380) are both opened, so that the second flow port (320) and the third flow port (330) are communicated, and the fourth flow port (340) and the first flow port (310) are communicated.

2. The heat pump system of claim 1, wherein, The finned evaporator (400) is provided with a gas collecting pipe (410), one end of the gas collecting pipe (410) is communicated with the outlet end of the fin flow path, and the other end is communicated with the fourth flow port (340).

3. The heat pump system of claim 2, wherein, The gas collecting pipe (410) has one gas outlet (420) and multiple gas inlets (430), the gas inlets (430) are one-to-one corresponding to the fin flow paths, the gas inlets (430) are communicated with the outlet ends of the fin flow paths, and the gas outlet (420) is communicated with the fourth flow port (340).

4. The heat pump system of claim 3, wherein, Multiple gas inlets (430) are arranged at equal intervals.

5. The heat pump system of claim 1, wherein, The heat pump system further comprises a four-way valve (700), the four-way valve (700) has a port a, a port b, a port c and a port d, the compressor (100) has a jet port (110) and a suction port (120), the port a is communicated with the jet port (110), the port b is communicated with the condenser (200), the port c is communicated with the suction port (120), and the port d is communicated with the third flow port (330).

6. The heat pump system of claim 5, wherein, When the heat pump system is in the heating mode, the port a and the port b are communicated, and the port c and the port d are communicated; when the heat pump system is in the refrigeration mode, the port a and the port d are communicated, and the port b and the port c are communicated.

7. The heat pump system of claim 6, wherein, The condenser (200) and the first flow port (310) are further provided with an expansion valve (800), and the expansion valve (800) is configured to throttle and depressurize the refrigerant.

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