Heat pump system and air conditioner having the same

Abstract

The present invention provides a heat pump system and an air conditioner having the same, including: an outdoor heat exchanger assembly including multiple rows of outdoor heat exchangers arranged side by side, and first connection ends of each row of outdoor heat exchangers are all communicated with an indoor heat exchanger; a plurality of heat exchange pipelines, both the indoor heat exchanger and the outdoor heat exchanger assembly are communicated with at least one of the plurality of heat exchange pipelines; wherein, when the heat pump system is in a first working state, the plurality of heat exchange pipelines are all communicated with the indoor heat exchanger, the plurality of heat exchange pipelines are arranged in one-to-one correspondence with the multiple rows of outdoor heat exchangers, and each row of outdoor heat exchangers is communicated with the corresponding heat exchange pipeline to form a plurality of first heat exchange circuits; when the heat pump system is in a second working state, the indoor heat exchanger and the multiple rows of outdoor heat exchangers are both communicated with one of the plurality of heat exchange pipelines to form a second heat exchange circuit. To solve the technical problem of uneven flow distribution between the inner and outer rows of the microchannel heat exchanger in the existing heat pump system.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump systems, and in particular, to a heat pump system and an air conditioner having the same. Background Art

[0002] Currently, in an air conditioning system, by applying an aluminum microchannel heat exchanger to an air conditioning unit, while ensuring the heat exchange capacity, the refrigerant demand can be reduced, the weight of the whole machine can be reduced, and thus the cost can be reduced, and at the same time, higher performance can be obtained. Especially for a microchannel heat exchanger with two rows in parallel, the refrigerant flow path can be reduced, and the controllability of the flow splitting can be increased.

[0003] However, the uneven flow splitting between the inner and outer rows of the microchannel heat exchanger and between different flow paths in the same row directly affects the air conditioning performance and the heating frosting and defrosting efficiency, which hinders its popularization. Summary of the Invention

[0004] The main object of the present invention is to provide a heat pump system and an air conditioner having the same, so as to solve the technical problem of uneven flow splitting between the inner and outer rows of the microchannel heat exchanger in the existing heat pump system.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a heat pump system, including: an indoor heat exchanger and an outdoor heat exchanger assembly, the outdoor heat exchanger assembly including a plurality of rows of outdoor heat exchangers arranged side by side, and the first connection ends of each row of outdoor heat exchangers are all communicated with the indoor heat exchanger; a plurality of heat exchange pipelines, both the indoor heat exchanger and the outdoor heat exchanger assembly are communicated with at least one of the plurality of heat exchange pipelines; wherein, the heat pump system has a first working state and a second working state. When the heat pump system is in the first working state, all the plurality of heat exchange pipelines are communicated with the indoor heat exchanger, the plurality of heat exchange pipelines are arranged in one-to-one correspondence with the plurality of rows of outdoor heat exchangers, and each row of outdoor heat exchangers is communicated with the corresponding heat exchange pipeline to form a plurality of first heat exchange circuits; when the heat pump system is in the second working state, the indoor heat exchanger and the plurality of rows of outdoor heat exchangers are both communicated with one of the plurality of heat exchange pipelines to form a second heat exchange circuit.

[0006] Further, each heat exchange pipeline includes: a four-way valve, a compressor and a gas-liquid separator, and the indoor heat exchanger, the compressor, the gas-liquid separator and the outdoor heat exchanger assembly are all communicated with the four-way valve.

[0007] Further, the plurality of heat exchange pipelines include: a first heat exchange pipeline, which includes a first four-way valve, a first compressor, and a first gas-liquid separator, and both the first compressor and the first gas-liquid separator are connected to the first four-way valve; a second heat exchange pipeline, which includes a second four-way valve, a second compressor, and a second gas-liquid separator, and both the second compressor and the second gas-liquid separator are connected to the second four-way valve; wherein, the first four-way valve and / or the second four-way valve are connected to the indoor heat exchanger, and the outdoor heat exchanger assembly includes an inner row heat exchanger and an outer row heat exchanger; the inner row heat exchanger and / or the outer row heat exchanger are connected to the first four-way valve, or the inner row heat exchanger and / or the outer row heat exchanger are connected to the second four-way valve.

[0008] Further, the outdoor heat exchanger assembly includes an inner row heat exchanger and an outer row heat exchanger, and the heat pump system further includes: a first pipeline, the inner row heat exchanger is arranged on the first pipeline, and the first pipeline is arranged between the first four-way valve and the indoor heat exchanger; a second pipeline, the outer row heat exchanger is arranged on the second pipeline, and the second pipeline is arranged between the second four-way valve and the indoor heat exchanger; a third pipeline, a first connection end of the third pipeline is connected to the first pipeline, a second connection end of the third pipeline is connected to the second pipeline, and a two-way solenoid valve is arranged on the third pipeline.

[0009] Further, the heat pump system further includes: a first electronic expansion valve arranged on the first pipeline; and / or, a second electronic expansion valve arranged on the second pipeline.

[0010] Further, the heat pump system further includes: a flash tank arranged between the indoor heat exchanger and the outdoor heat exchanger assembly.

[0011] Further, the heat pump system further includes: a fourth pipeline, a first connection end of the fourth pipeline is connected to the flash tank, and a second connection end of the fourth pipeline is connected to a first air supplement port of the first compressor; a fifth pipeline, a first connection end of the fifth pipeline is connected to the flash tank, and a second connection end of the fifth pipeline is connected to a second air supplement port of the second compressor.

[0012] Further, a first air supplement solenoid valve is arranged on the fourth pipeline; and / or, a second air supplement solenoid valve is arranged on the fifth pipeline.

[0013] Further, a first air supplement check valve is arranged on the fourth pipeline; and / or, a second air supplement check valve is arranged on the fifth pipeline.

[0014] According to another aspect of the present invention, there is provided an air conditioner, which includes a heat pump system, and the heat pump system is the heat pump system provided above.

[0015] Applying the technical solution of the present invention, when the heat pump system is in the first working state, multiple first heat exchange circuits can be formed, and heat exchange is carried out through the multiple first heat exchange circuits. The distribution of the refrigerant in each row of outdoor heat exchangers is controlled by adjusting and controlling the working conditions of each heat exchange pipeline. Specifically, the outdoor heat exchanger assembly in this embodiment is a microchannel heat exchanger structure. By adopting the above structure and the multi-exhaust and multi-suction system of the microchannel multi-connected air conditioner, it is possible to facilitate improving the distribution ratio of the refrigerant in each row of heat exchangers, and further improve the uniformity of refrigerant flow splitting. Therefore, through the technical solution provided by the present invention, the technical problem of uneven flow splitting between the inner and outer rows of the microchannel heat exchanger in the existing heat pump system can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The schematic diagrams in the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 Shows the working schematic diagram of the heat pump system provided in Embodiment 1 of the present invention in the refrigeration mode with a double-exhaust circulation system (the two-way solenoid valve is closed);

[0018] Figure 2 Shows the working schematic diagram of the heat pump system provided in Embodiment 1 of the present invention in the heating mode with a double-suction circulation system (the two-way solenoid valve is closed);

[0019] Figure 3 Shows the working schematic diagram of the heat pump system provided in Embodiment 1 of the present invention in the refrigeration and heating system (the two-way solenoid valve is opened) when the compressor operates alone at low load.

[0020] Among them, the above-mentioned drawings include the following reference numerals:

[0021] 10, indoor heat exchanger; 20, outdoor heat exchanger assembly; 21, inner row heat exchanger; 22, outer row heat exchanger; 31, first four-way valve; 32, second four-way valve; 41, first compressor; 42, second compressor; 51, first gas-liquid separator; 52, second gas-liquid separator; 61, first pipeline; 62, second pipeline; 63, third pipeline; 64, fourth pipeline; 65, fifth pipeline; 71, two-way solenoid valve; 72, first electronic expansion valve; 73, second electronic expansion valve; 74, first make-up air solenoid valve; 75, second make-up air solenoid valve; 76, first make-up air check valve; 77, second make-up air check valve; 78, gas pipe stop valve; 79, liquid pipe stop valve; 80, flash tank; 90, outdoor fan; 100, first exhaust check valve; 110, second exhaust check valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0023] As Figures 1 to 3 shown, an embodiment of the present invention provides a heat pump system, which includes an indoor heat exchanger 10, an outdoor heat exchanger assembly 20, and a plurality of heat exchange pipelines. The outdoor heat exchanger assembly 20 includes multiple rows of outdoor heat exchangers arranged side by side. The first connection ends of each row of outdoor heat exchangers are all connected to the indoor heat exchanger 10. Both the indoor heat exchanger 10 and the outdoor heat exchanger assembly 20 are connected to at least one of the plurality of heat exchange pipelines. Among them, the heat pump system has a first working state and a second working state. When the heat pump system is in the first working state, all the plurality of heat exchange pipelines are connected to the indoor heat exchanger 10, and the plurality of heat exchange pipelines are arranged in one-to-one correspondence with the multiple rows of outdoor heat exchangers. Each row of outdoor heat exchangers is connected to the corresponding heat exchange pipeline to form a plurality of first heat exchange circuits; when the heat pump system is in the second working state, the indoor heat exchanger 10 and the multiple rows of outdoor heat exchangers are both connected to one of the plurality of heat exchange pipelines to form a second heat exchange circuit.

[0024] It should be noted that the heat exchange pipeline here refers to a pipeline that can be connected to at least one row of heat exchangers of the indoor heat exchanger 10 and the outdoor heat exchanger assembly 20 and perform heat exchange. After the heat exchange pipeline is connected to at least one of the indoor heat exchanger 10 and the outdoor heat exchanger assembly 20, a heat exchange circuit can be formed, and the heat exchange circuit can complete a complete heat exchange process. In this embodiment, when the heat pump system is in the first working state, a plurality of first heat exchange circuits can be formed, and heat exchange can be performed through the plurality of first heat exchange circuits. By adjusting and controlling the working conditions of each heat exchange pipeline, the distribution of the refrigerant in each row of outdoor heat exchangers can be controlled. Specifically, the outdoor heat exchanger assembly 20 in this embodiment is a microchannel heat exchanger structure. By adopting the above structure, through the multi-exhaust and multi-suction system of the microchannel multi-connected air conditioner, the uniformity of the distribution of the refrigerant in each row of heat exchangers can be improved. Therefore, through the heat pump system provided by this embodiment, the technical problem of uneven flow distribution between the inner and outer rows of the microchannel heat exchanger in the existing heat pump system can be solved.

[0025] Specifically, each heat exchange pipeline in this embodiment includes a four-way valve, a compressor, and a gas-liquid separator. The indoor heat exchanger 10, the compressor, the gas-liquid separator, and the outdoor heat exchanger assembly 20 are all connected to the four-way valve. With such a structural arrangement, each heat exchange pipeline can achieve the heat exchange function, and by adjusting the operating frequency of the compressor in each heat exchange pipeline and the on / off state of the four-way valve, it is convenient to control the operating state of the heat pump system. When the heat pump system is in the first operating state, it is convenient to control the refrigerant flow rate of each row of outdoor heat exchangers corresponding to each heat exchange pipeline by controlling the operating frequency of the compressor in each heat exchange pipeline, so as to further improve the distribution uniformity of the refrigerant flow rate of each row of outdoor heat exchangers.

[0026] In this embodiment, the multiple heat exchange pipelines include a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline includes a first four-way valve 31, a first compressor 41, and a first gas-liquid separator 51. The first compressor 41 and the first gas-liquid separator 51 are both connected to the first four-way valve 31. The second heat exchange pipeline includes a second four-way valve 32, a second compressor 42, and a second gas-liquid separator 52. The second compressor 42 and the second gas-liquid separator 52 are both connected to the second four-way valve 32. Among them, the first four-way valve 31 and / or the second four-way valve 32 is connected to the indoor heat exchanger 10. The outdoor heat exchanger assembly 20 includes an inner row heat exchanger 21 and an outer row heat exchanger 22; the inner row heat exchanger 21 and / or the outer row heat exchanger 22 is connected to the first four-way valve 31, or the inner row heat exchanger 21 and / or the outer row heat exchanger 22 is connected to the second four-way valve 32.

[0027] Specifically, the first four-way valve 31 is connected to the indoor heat exchanger 10, and the inner row heat exchanger 21 is connected to the first four-way valve 31; or, the second four-way valve 32 is connected to the indoor heat exchanger 10, and the outer row heat exchanger 22 is connected to the second four-way valve 32. The above two situations are both the second operating state, and the second operating state is suitable for operation under low load. When in high load, the first operating state of double suction and double row can be achieved, and the two first heat exchange circuits exchange heat simultaneously to improve the energy efficiency of the system. With the above structure, it is convenient to select the corresponding operating state according to the actual situation to meet different usage requirements. Specifically, through the technical solution of double compressors with double suction and double row, the applicability problem of single compressor operation of the system under low load can be solved, the overall machine power can be reduced, and the energy efficiency of the system can be improved.

[0028] In this embodiment, the outdoor heat exchanger assembly 20 includes an inner row heat exchanger 21, an outer row heat exchanger 22, and an outdoor fan 90. The inner row heat exchanger 21 and the outer row heat exchanger 22 are arranged side by side. The inner row heat exchanger 21 and the outer row heat exchanger 22 may or may not be connected. The outdoor fan 90 is arranged on the side of the inner row heat exchanger 21 away from the outer row heat exchanger 22. The heat pump system further includes a first pipeline 61, a second pipeline 62, and a third pipeline 63. The inner row heat exchanger 21 is arranged on the first pipeline 61, and the first pipeline 61 is arranged between the first four-way valve 31 and the indoor heat exchanger 10. The outer row heat exchanger 22 is arranged on the second pipeline 62, and the second pipeline 62 is arranged between the second four-way valve 32 and the indoor heat exchanger 10. The first connection end of the third pipeline 63 is communicated with the first pipeline 61, the second connection end of the third pipeline 63 is communicated with the second pipeline 62, and a two-way solenoid valve 71 is arranged on the third pipeline 63. With such a structural arrangement, it is convenient to control the connection condition of the outdoor heat exchanger assembly 20 by controlling the on-off condition of the two-way solenoid valve 71.

[0029] Specifically, the heat pump system further includes a first electronic expansion valve 72, and the first electronic expansion valve 72 is arranged on the first pipeline 61. Alternatively, the heat pump system further includes a second electronic expansion valve 73, and the second electronic expansion valve 73 is arranged on the second pipeline 62. Alternatively, the heat pump system further includes a first electronic expansion valve 72 and a second electronic expansion valve 73. The first electronic expansion valve 72 is arranged on the first pipeline 61, and the second electronic expansion valve 73 is arranged on the second pipeline 62.

[0030] Preferably, the heat pump system in this embodiment further includes a first electronic expansion valve 72 and a second electronic expansion valve 73. The first electronic expansion valve 72 is arranged on the first pipeline 61, and the second electronic expansion valve 73 is arranged on the second pipeline 62. With such a structural arrangement, by controlling the opening degrees of the first electronic expansion valve 72 and the second electronic expansion valve 73, the distribution of the refrigerant flow rates of the inner row heat exchanger 21 and the outer row heat exchanger 22 can be controlled, the operation convenience is improved, and it is also beneficial to improve the uniformity of the refrigerant distribution.

[0031] Specifically, the heat pump system in this embodiment further includes a flash tank 80, and the flash tank 80 is arranged between the indoor heat exchanger 10 and the outdoor heat exchanger assembly 20. With the above structural arrangement, it is convenient to vaporize part of the liquid refrigerant. The flash tank 80 in this embodiment can also be replaced by a plate heat exchanger.

[0032] In this embodiment, the heat pump system further includes a fourth pipeline 64 and a fifth pipeline 65. The first connection end of the fourth pipeline 64 communicates with the flash tank 80, and the second connection end of the fourth pipeline 64 communicates with the first air replenishment port of the first compressor 41. The first connection end of the fifth pipeline 65 communicates with the flash tank 80, and the second connection end of the fifth pipeline 65 communicates with the second air replenishment port of the second compressor 42. With such a structural arrangement, it is convenient to replenish air to the first air replenishment port of the first compressor 41 through the fourth pipeline 64 and to replenish air to the second air replenishment port of the second compressor 42 through the fifth pipeline 65.

[0033] Specifically, a first air replenishment solenoid valve 74 is provided on the fourth pipeline 64; alternatively, a second air replenishment solenoid valve 75 is provided on the fifth pipeline 65; or, a first air replenishment solenoid valve 74 is provided on the fourth pipeline 64, and a second air replenishment solenoid valve 75 is provided on the fifth pipeline 65.

[0034] Preferably, in this embodiment, a first air replenishment solenoid valve 74 is provided on the fourth pipeline 64, and a second air replenishment solenoid valve 75 is provided on the fifth pipeline 65. With such a structural arrangement, it is convenient to control the air replenishment amount to the first air replenishment port of the first compressor 41 by controlling the first air replenishment solenoid valve 74, and to control the air replenishment amount to the second air replenishment port of the second compressor 42 by controlling the second air replenishment solenoid valve 75, so as to improve the operation convenience.

[0035] In this embodiment, a first air replenishment check valve 76 is provided on the fourth pipeline 64; alternatively, a second air replenishment check valve 77 is provided on the fifth pipeline 65; or, a first air replenishment check valve 76 is provided on the fourth pipeline 64, and a second air replenishment check valve 77 is provided on the fifth pipeline 65.

[0036] Preferably, a first air replenishment check valve 76 is provided on the fourth pipeline 64 in this embodiment, and a second air replenishment check valve 77 is provided on the fifth pipeline 65. With such a structural arrangement, it is convenient to control the air replenishment direction of the first air replenishment inlet through the first air replenishment check valve 76 and to control the air replenishment direction of the second air replenishment inlet through the second air replenishment check valve 77.

[0037] In this embodiment, the refrigeration dual high pressure and the heating dual low pressure operations are realized through the double compressors and the parallel outdoor heat exchanger assembly 20. The operating parameters of the double compressors and the double electronic expansion valves are reasonably regulated to control the flow ratio of the inner and outer rows of the microchannel heat exchanger, so as to realize the uniform flow distribution among the flow paths. By adding a two-way solenoid valve 71 between the air pipe connecting each row of heat exchangers and the four-way valve, the switching between the dual-temperature system and the single-temperature system is realized. Under low load, a single compressor (one compressor operates) operates to improve the energy efficiency.

[0038] The outdoor unit circulation system in this embodiment mainly consists of two compressors, two four-way valves, two gas-liquid separators, two electronic expansion valves, a double-row parallel microchannel heat exchanger, and some auxiliary valves. Compared with ordinary multi-connected air conditioners, this solution uses a combination of two systems to separate the inner-row heat exchanger 21 and the outer-row heat exchanger 22 of the outdoor heat exchanger assembly 20. At the same time, a first electronic expansion valve 72 and a second electronic expansion valve 73 are respectively arranged on each row of heat exchangers. By controlling the frequencies of the two compressors (specifically, the first compressor 41 and the second compressor 42) and adjusting the opening degrees of the first electronic expansion valve 72 and the second electronic expansion valve 73, the purpose of uniform flow distribution and enhanced heat transfer of the microchannel heat exchanger is achieved. In addition, a two-way solenoid valve 71 is short-circuited on the pipeline connecting the two four-way valves (including the first four-way valve 31 and the second four-way valve 32) to the heat exchanger, which can realize the switching between the refrigeration double-high pressure, the heating double-low pressure, and the conventional single-high pressure and single-low pressure systems. When only one compressor needs to be turned on at low load, the problem that the two rows of heat exchangers in this system cannot participate in the cycle simultaneously is solved.

[0039] Combined with Figure 1 In the refrigeration mode cycle, when the unit is operating at high load, the two-way solenoid valve 71 is closed, the first compressor 41 and the second compressor 42 are both enabled, the first four-way valve 31 and the second four-way valve 32 are both in the closed state, and the first gas replenishing solenoid valve 74 and the second gas replenishing solenoid valve 75 can be opened or closed according to the load demand. In this cycle, the first compressor 41, the first exhaust check valve 100, the first four-way valve 31, the inner-row heat exchanger 21 (a microchannel heat exchanger), the first electronic expansion valve 72, the flash tank 80, the first gas replenishing solenoid valve 74, the first gas replenishing check valve 76, the indoor heat exchanger 10, and the first gas-liquid separator form the first system, and the second compressor 42, the second exhaust check valve 110, the second four-way valve 32, the outer-row heat exchanger 22 (a microchannel heat exchanger), the second electronic expansion valve 73, the flash tank 80, the second gas replenishing solenoid valve 75, the second gas replenishing check valve 77, the indoor heat exchanger 10, and the second gas-liquid separator form the second system. When the refrigeration mode is turned on, the low pressures of the two systems are the same, and the two high pressures can be respectively controlled by the frequencies of the first compressor 41, the frequency of the second compressor 42, the opening degree of the first electronic expansion valve 72, and the opening degree of the second electronic expansion valve 73, forming different high-pressure saturation temperature differences between the inner row and the outer row in the outdoor heat exchanger assembly 20, which is beneficial to obtaining the best refrigerant flow distribution and heat transfer effect.

[0040] Refrigeration operation process: The low-pressure gas separated by the first vapor-liquid separator is compressed by the first compressor 41 and then becomes high-temperature and high-pressure gas. After passing through the first four-way valve 31, it enters the inner row heat exchanger 21 of the outdoor heat exchanger assembly 20 for condensation heat exchange into liquid. Then, after flowing through the first electronic expansion valve 72, it enters the flash tank 80 where part of the liquid evaporates. The medium-pressure gas enters the first air supplement port of the first compressor 41 through the first air supplement solenoid valve 74 (when opened) and the first air supplement check valve 76. The liquid refrigerant in the flash tank 80 continues to enter the indoor heat exchanger 10 through the liquid pipe stop valve 79, evaporates into low-pressure gas after throttling by the electronic expansion valve in the indoor unit, and the gas flows through the gas pipe stop valve 78 and enters the first four-way valve 31 and the second four-way valve 32 respectively. Finally, after the vapor-liquid separation is completed by the vapor-liquid separator, it returns to the first compressor. The circulation process of the outer row microchannel system (also the first heat exchange circuit) is similar and will not be repeated.

[0041] Combined with Figure 2 Heating mode cycle, heating operation process: The low-pressure gas coming out of the vapor-liquid separator is compressed by the first compressor 41 to become high-temperature and high-pressure gas. After passing through the first four-way valve 31 and the first gas pipe stop valve 78, it enters the indoor heat exchanger 10 for condensation heat exchange into liquid. The liquid refrigerant then flows into the flash tank 80 through the liquid pipe stop valve 79, where part of the liquid flashes into gas and enters the compressor air supplement port through the first air supplement solenoid valve 74 (when opened) and the first air supplement check valve 76. The liquid refrigerant in the flash tank 80 is throttled by the first electronic expansion valve 72 and then enters the inner row heat exchanger 21 for evaporation. Finally, the low-pressure gas returns to the first compressor 41 after the vapor-liquid separation is completed by the vapor-liquid separator. The circulation process of the outer row microchannel system is similar and will not be repeated.

[0042] Combined with Figure 3 Low-load operation, when only one system needs to operate, just open the two-way solenoid valve 71, and the refrigerant can participate in heat exchange through the inner row heat exchanger 21 and the outer row heat exchanger 22 at the same time. The first air supplement check valve 76 and the second air supplement check valve 77 added in the present invention, in cooperation with the first air supplement solenoid valve 74 and the second air supplement solenoid valve 75, can prevent the refrigerant from flowing back through the air supplement pipe of the unstarted compressor and causing gas cross when the compressor is operating alone.

[0043] Embodiment 2 of the present invention provides an air conditioner, and the air conditioner includes a heat pump system, and the heat pump system is the heat pump system provided in the above embodiment.

[0044] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: Through the refrigeration dual-exhaust and heating dual-suction systems, the operating frequencies of the first compressor and the second compressor, and the opening degrees of the first electronic expansion valve and the second electronic expansion valve are respectively controlled, so that the refrigerant is reasonably distributed in the two rows of heat exchangers, and at the same time, the flow path distribution in the same row is made uniform. During heating, the evaporation pressure or evaporation temperature of the outer row heat exchanger is appropriately increased, the evaporation temperature of the inner row is reduced, the frosting time of the outer row is delayed, the frosting of the heat exchanger is more uniform, and the heat exchange effect and performance are improved. The dual-temperature system formed by the combination of the two sets of heat exchange circuits in the present invention enables each row of microchannel heat exchangers to have higher controllability. In addition, the two-way solenoid valve can complete the switching between the dual-exhaust dual-suction system and the ordinary single-exhaust single-suction system, and can improve the system energy efficiency when the compressor is single-opened under low load.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0047] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0048] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings and thus should not be construed as limiting the scope of protection of this application.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat pump system, characterized in that, Comprising: An indoor heat exchanger (10) and an outdoor heat exchanger assembly (20), wherein the outdoor heat exchanger assembly (20) includes multiple rows of outdoor heat exchangers arranged side by side, and the first connection ends of each row of the outdoor heat exchangers are all communicated with the indoor heat exchanger (10); Multiple heat exchange pipelines, both the indoor heat exchanger (10) and the outdoor heat exchanger assembly (20) are communicated with at least one of the multiple heat exchange pipelines; Wherein, the heat pump system has a first working state and a second working state. When the heat pump system is in the first working state, multiple heat exchange pipelines are all communicated with the indoor heat exchanger (10), and the multiple heat exchange pipelines are arranged in one-to-one correspondence with multiple rows of outdoor heat exchangers, and each row of outdoor heat exchangers is communicated with the corresponding heat exchange pipeline to form multiple first heat exchange circuits; when the heat pump system is in the second working state, the indoor heat exchanger (10) and multiple rows of outdoor heat exchangers are all communicated with one of the multiple heat exchange pipelines to form a second heat exchange circuit; The multiple heat exchange pipelines include: A first heat exchange pipeline, which includes a first four-way valve (31), a first compressor (41) and a first gas-liquid separator (51), and both the first compressor (41) and the first gas-liquid separator (51) are communicated with the first four-way valve (31); A second heat exchange pipeline, which includes a second four-way valve (32), a second compressor (42) and a second gas-liquid separator (52), and both the second compressor (42) and the second gas-liquid separator (52) are communicated with the second four-way valve (32); Wherein, the first four-way valve (31) and / or the second four-way valve (32) is communicated with the indoor heat exchanger (10), and the outdoor heat exchanger assembly (20) includes an inner row heat exchanger (21) and an outer row heat exchanger (22); the inner row heat exchanger (21) and / or the outer row heat exchanger (22) is communicated with the first four-way valve (31), or the inner row heat exchanger (21) and / or the outer row heat exchanger (22) is communicated with the second four-way valve (32).

2. The heat pump system according to claim 1, characterized in that, Each of the heat exchange pipelines includes: A four-way valve, a compressor and a gas-liquid separator, and the indoor heat exchanger (10), the compressor, the gas-liquid separator and the outdoor heat exchanger assembly (20) are all communicated with the four-way valve.

3. The heat pump system according to claim 1, wherein The heat pump system further includes: A first pipeline (61), on which the inner row heat exchanger (21) is arranged, and the first pipeline (61) is arranged between the first four-way valve (31) and the indoor heat exchanger (10); A second pipeline (62), on which the outer row heat exchanger (22) is arranged, and the second pipeline (62) is arranged between the second four-way valve (32) and the indoor heat exchanger (10); A third pipeline (63), a first connection end of the third pipeline (63) is communicated with the first pipeline (61), a second connection end of the third pipeline (63) is communicated with the second pipeline (62), and a two-way solenoid valve (71) is arranged on the third pipeline (63).

4. The heat pump system according to claim 3, characterized in that, The heat pump system further includes: A first electronic expansion valve (72) arranged on the first pipeline (61); and / or, A second electronic expansion valve (73) arranged on the second pipeline (62).

5. The heat pump system according to claim 1, wherein The heat pump system further includes: A flash tank (80) arranged between the indoor heat exchanger (10) and the outdoor heat exchanger assembly (20).

6. The heat pump system according to claim 5, characterized in that The heat pump system further includes: A fourth pipeline (64), a first connection end of the fourth pipeline (64) is communicated with the flash tank (80), and a second connection end of the fourth pipeline (64) is communicated with a first air supplement port of the first compressor (41); A fifth pipeline (65), a first connection end of the fifth pipeline (65) is communicated with the flash tank (80), and a second connection end of the fifth pipeline (65) is communicated with a second air supplement port of the second compressor (42).

7. The heat pump system according to claim 6, wherein A first air supplement solenoid valve (74) is arranged on the fourth pipeline (64); and / or, A second air supplement solenoid valve (75) is arranged on the fifth pipeline (65).

8. The heat pump system according to claim 6, wherein A first air supplement check valve (76) is arranged on the fourth pipeline (64); and / or, A second air supplement check valve (77) is arranged on the fifth pipeline (65).

9. An air conditioner, characterized in that, The air conditioner includes a heat pump system, and the heat pump system is the heat pump system according to any one of claims 1 to 8.

Images