Heat recovery heat pump system

Abstract

The utility model discloses a heat recovery heat pump system which comprises a compressor, a heat recovery heat exchanger, a high-pressure gas-liquid separator, an outdoor heat exchanger, at least one indoor unit, a four-way valve, a first switch valve and a reversing valve. The heat recovery heat exchanger comprises a first refrigerant inlet and a first refrigerant outlet. The high-pressure gas-liquid separator comprises a second refrigerant inlet, a second refrigerant outlet used for outputting the gaseous refrigerant after gas-liquid separation and a third refrigerant outlet used for outputting the gaseous refrigerant after gas-liquid separation. The heat recovery heat pump system has a refrigeration and total heat recovery domestic hot water making mode and a refrigeration and partial heat recovery domestic hot water making mode, and the reversing valve keeps a second refrigerant outlet of the high-pressure gas-liquid separator to be communicated with the four-way valve in the two modes, so that the reversing valve does not need to be operated during mode switching, only the four-way valve needs to be operated, and the mode switching efficiency is improved. And the automatic flow direction of the refrigerant during mode switching can be realized by utilizing gas-liquid separation of the high-pressure gas-liquid separator, so that the stability of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump technical field especially relates to a heat recovery heat pump system. BACKGROUND

[0002] The existing heat pump system generally fixedly configures two or three combined supply, and the system will involve the mutual switching between multiple modes, needs through the main control board action three -way valve and carries out the control to the corresponding component to switch, and the error of control can easily cause the system instability. UTILITY MODEL CONTENTS

[0003] The utility model solves at least one defect that the related technology exists in the above -mentioned background art: the mutual switching between multiple modes of heat pump system needs action three -way valve, but can easily cause the system instability, provides a heat recovery heat pump system.

[0004] The utility model adopts the technical scheme in the technical problems thereof: construct a kind of heat recovery heat pump system, comprising:

[0005] Compressor, the compressor is used to compress refrigerant;

[0006] Heat recovery heat exchanger, the heat recovery heat exchanger includes first refrigerant inlet and first refrigerant outlet being communicated with the first refrigerant inlet;

[0007] High-pressure gas-liquid separator, the high-pressure gas-liquid separator includes second refrigerant inlet, second refrigerant outlet being communicated with the second refrigerant inlet and third refrigerant outlet being communicated with the second refrigerant inlet;Second refrigerant outlet is used for gaseous refrigerant after gas-liquid separation is exported, and third refrigerant outlet is used for liquid refrigerant after gas-liquid separation is exported;

[0008] Outdoor side heat exchanger, at least one indoor unit, four-way valve, first switch valve and reversing valve;

[0009] Wherein, the outlet of the compressor is connected with the first refrigerant inlet through the first switch valve, the first refrigerant outlet is connected with the second refrigerant inlet, the second refrigerant outlet is connected with the four-way valve through the reversing valve, the four-way valve is connected with the outdoor side heat exchanger, the indoor unit and the inlet of the compressor, the third refrigerant outlet is connected with the indoor unit, and the outdoor side heat exchanger is connected with the indoor unit;

[0010] When the refrigeration and the hot water are simultaneously operated, the reversing valve keeps the second refrigerant outlet communicated with the four-way valve, and the whole heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a first flow path from the outlet of the compressor, the first switch valve, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the third refrigerant outlet, the indoor unit, the four-way valve and the inlet of the compressor;

[0011] When the refrigeration and the hot water are simultaneously operated, the reversing valve keeps the second refrigerant outlet communicated with the four-way valve, and the whole heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a first flow path from the outlet of the compressor, the first switch valve, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the third refrigerant outlet, the indoor unit, the four-way valve and the inlet of the compressor;

[0012] In some embodiments, the third refrigerant outlet is further connected with the outdoor heat exchanger;

[0013] When the refrigeration and the hot water are simultaneously operated, the reversing valve keeps the second refrigerant outlet communicated with the four-way valve, and the whole heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a first flow path from the outlet of the compressor, the first switch valve, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the third refrigerant outlet, the indoor unit, the four-way valve and the inlet of the compressor;

[0014] When the hot water is independently operated, the reversing valve keeps the second refrigerant outlet communicated with the four-way valve, and the whole heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a fourth flow path from the outlet of the compressor, the first switch valve, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the third refrigerant outlet, the outdoor heat exchanger, the four-way valve and the inlet of the compressor.

[0015] In some embodiments, the reversing valve comprises a first valve port, a second valve port and a third valve port;

[0016] The first valve port is connected with the second refrigerant outlet, the second valve port is connected with the four-way valve, and the third valve port is connected with the outlet of the compressor;

[0017] When the refrigeration and the hot water are simultaneously operated, the refrigeration and the hot water are simultaneously operated, and the hot water is independently operated, the first valve port is communicated with the second valve port.

[0018] In some embodiments, the outdoor side heat exchanger comprises a first refrigerant port and a second refrigerant port in communication with the first refrigerant port;

[0019] The indoor unit comprises a third refrigerant port and a fourth refrigerant port in communication with the third refrigerant port;

[0020] The fourth refrigerant port is connected to the second refrigerant port.

[0021] In some embodiments, the heat recovery heat pump system further comprises a gas pipe, a liquid pipe and at least two indoor units;

[0022] In each of the indoor units, the third refrigerant port is connected to a corresponding tapping end in the gas pipe, and the fourth refrigerant port is connected to a corresponding tapping end in the liquid pipe.

[0023] The total tapping end of the liquid pipe is connected to the third refrigerant outlet and the second refrigerant port.

[0024] The total tapping end of the gas pipe is connected to the four-way valve.

[0025] In some embodiments, the heat recovery heat pump system further comprises:

[0026] A second switch valve is arranged on the pipeline between the first switch valve and the first refrigerant inlet;

[0027] A third switch valve is arranged on the pipeline between the first refrigerant outlet and the second refrigerant inlet;

[0028] A fourth switch valve has one end connected to the third refrigerant outlet and the second refrigerant port, and the other end connected to the total tapping end of the liquid pipe; and

[0029] A fifth switch valve is arranged on the pipeline between the total tapping end of the gas pipe and the four-way valve.

[0030] In some embodiments, the heat recovery heat pump system further comprises at least one heat exchanger, which comprises a fifth refrigerant port and a sixth refrigerant port in communication with the fifth refrigerant port;

[0031] The fifth refrigerant port is connected to a corresponding tapping end in the gas pipe, and the sixth refrigerant port is connected to a corresponding tapping end in the liquid pipe.

[0032] In some embodiments, the heat recovery heat pump system further comprises an economizer module; wherein a first end of the economizer module is connected to the indoor unit, and a second end of the economizer module is connected to the outdoor heat exchanger and the third refrigerant outlet;

[0033] Alternatively, the heat recovery heat pump system further comprises an economizer module and a liquid storage container; wherein a first interface of the liquid storage container is connected to the indoor unit, and the third refrigerant outlet is connected to a pipeline between the first interface of the liquid storage container and the indoor unit; a second interface of the liquid storage container is connected to the first end of the economizer module, and the second end of the economizer module is connected to the outdoor heat exchanger.

[0034] In some embodiments, the heat recovery heat pump system further comprises a first throttling device;

[0035] Wherein the third refrigerant outlet is connected to the outdoor heat exchanger and the indoor unit through the first throttling device.

[0036] In some embodiments, the heat recovery heat pump system further comprises a second throttling device arranged corresponding to each indoor unit;

[0037] Wherein the second throttling device is arranged on a pipeline at the fourth refrigerant port.

[0038] By implementing the present utility model, the following beneficial effects are achieved:

[0039] In the refrigeration and total heat recovery mode for producing domestic hot water and the refrigeration and partial heat recovery mode for producing domestic hot water, the reversing valve keeps the second refrigerant outlet of the high-pressure gas-liquid separator in communication with the four-way valve, so that when switching between the two modes, the reversing valve does not need to be actuated, only the four-way valve needs to be actuated, and the gas-liquid separation of the high-pressure gas-liquid separator can realize automatic refrigerant flow direction when switching between the modes, thereby improving the stability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0040] The present utility model will be further described below in combination with the drawings and embodiments, and the drawings are as follows:

[0041] Figure 1 is the first schematic diagram of the heat recovery heat pump system of the present utility model;

[0042] Figure 2 is the second schematic diagram of the heat recovery heat pump system of the present utility model;

[0043] Figure 3 is Figure 1 the refrigerant flow direction schematic diagram of the heat recovery heat pump system shown in the figure for producing hot water through the total heat recovery mode while refrigerating.

[0044] Figure 4 is Figure 1 A first refrigerant flow direction schematic view of a heat recovery heat pump system for preparing hot water while refrigerating by a partial heat recovery mode is shown in the figure.

[0045] Figure 5 is Figure 1 A second refrigerant flow direction schematic view of a heat recovery heat pump system for preparing hot water while refrigerating by a partial heat recovery mode is shown in the figure.

[0046] Figure 6 is Figure 1 A first refrigerant flow direction schematic view of a heat recovery heat pump system for preparing hot water while refrigerating is shown in the figure.

[0047] Figure 7 is Figure 1 A second refrigerant flow direction schematic view of a heat recovery heat pump system for preparing hot water while refrigerating is shown in the figure.

[0048] Figure 8 is Figure 1 A refrigerant flow direction schematic view of a heat recovery heat pump system when preparing hot water only is shown in the figure.

[0049] Figure 9 is Figure 1 A refrigerant flow direction schematic view of a heat recovery heat pump system when refrigerating is shown in the figure.

[0050] Figure 10 is Figure 1 A refrigerant flow direction schematic view of a heat recovery heat pump system when heating is shown in the figure.

[0051] Figure 11 is Figure 2 A refrigerant flow direction schematic view of a heat recovery heat pump system for preparing hot water while refrigerating by a full heat recovery mode is shown in the figure.

[0052] Figure 12 is Figure 2 A refrigerant flow direction schematic view of a heat recovery heat pump system when preparing hot water only is shown in the figure. DETAILED DESCRIPTION

[0053] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0054] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0055] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0056] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "provided", "located" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be chemically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0057] It needs to be explained here that the connection between the following ports, between the ports and the components or between the components is only a physical structural connection, and does not uniquely limit the communication relationship and the refrigerant flow relationship.

[0058] As shown in Figure 1 and Figure 2 Some embodiments of the utility model disclose a heat recovery heat pump system, which comprises a compressor 11, a heat recovery heat exchanger 12, a high-pressure gas-liquid separator 13, an outdoor side heat exchanger 14, at least one indoor unit 15, a four-way valve 16, a first switch valve 17 and a reversing valve 18. Understandably, at least one can be one, two, three or any number. The heat recovery heat pump system is as follows:

[0059] The compressor 11 is used for compressing refrigerant. The heat recovery heat exchanger 12 is used for realizing heat exchange between refrigerant and water in the domestic water tank 20, and comprises a first refrigerant inlet 121 and a first refrigerant outlet 122 connected with the first refrigerant inlet 121. The high-pressure gas-liquid separator 13 comprises a second refrigerant inlet 131, a second refrigerant outlet 132 connected with the second refrigerant inlet 131 and used for outputting gaseous refrigerant after gas-liquid separation, and a third refrigerant outlet 133 connected with the second refrigerant inlet 131 and used for outputting liquid refrigerant after gas-liquid separation.

[0060] The outlet of the compressor 11 is connected with the first refrigerant inlet 121 through the first switch valve 17, the first refrigerant outlet 122 is connected with the second refrigerant inlet 131, the second refrigerant outlet 132 is connected with the four-way valve 16 through the reversing valve 18, the four-way valve 16 is connected with the outdoor heat exchanger 14, the indoor unit 15 and the inlet of the compressor 11, the third refrigerant outlet 133 is connected with the indoor unit 15, and the outdoor heat exchanger 14 is connected with the indoor unit 15.

[0061] When the refrigeration and the domestic hot water are simultaneously operated, the reversing valve 18 keeps the second refrigerant outlet 132 connected with the four-way valve 16, and the whole heat of the refrigerant is exchanged in the heat recovery heat exchanger 12, that is, in the refrigeration and full heat recovery domestic hot water mode, the refrigerant forms a first flow path from the outlet of the compressor 11, the first switch valve 17, the first refrigerant inlet 121, the first refrigerant outlet 122, the second refrigerant inlet 131, the third refrigerant outlet 133, the indoor unit 15, the four-way valve 16 and the inlet of the compressor 11.

[0062] When the refrigeration and the domestic hot water are simultaneously operated, the reversing valve 18 keeps the second refrigerant outlet 132 connected with the four-way valve 16, and part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger 12, that is, in the refrigeration and partial heat recovery domestic hot water mode, the refrigerant forms a second flow path from the outlet of the compressor 11, the first switch valve 17, the first refrigerant inlet 121, the first refrigerant outlet 122, the second refrigerant inlet 131, the second refrigerant outlet 132, the reversing valve 18, the four-way valve 16, the outdoor heat exchanger 14, the indoor unit 15, the four-way valve 16 and the inlet of the compressor 11.

[0063] In the refrigeration and full heat recovery hot water mode and the refrigeration and partial heat recovery hot water mode, the reversing valve 18 keeps the second refrigerant outlet 132 of the high-pressure gas-liquid separator 13 in communication with the four-way valve 16, so that the reversing valve 18 does not need to be actuated when switching between the two modes, and only the four-way valve 16 needs to be actuated. The gas-liquid separation of the high-pressure gas-liquid separator 13 can realize the automatic flow direction of the refrigerant when switching between the two modes, thereby improving the stability of the system.

[0064] In some embodiments, the third refrigerant outlet 133 is also connected to the outdoor heat exchanger 14.

[0065] When heating and hot water are operated simultaneously, the reversing valve 18 keeps the second refrigerant outlet 132 in communication with the four-way valve 16, and the partial heat of the refrigerant is exchanged in the heat recovery heat exchanger 12, i.e. in the heating and hot water mode, the refrigerant forms a third flow path from the outlet of the compressor 11, through the first switch valve 17, the first refrigerant inlet 121, the first refrigerant outlet 122, the second refrigerant inlet 131, the second refrigerant outlet 132, the reversing valve 18, the four-way valve 16, the indoor unit 15, the outdoor heat exchanger 14, the four-way valve 16, and the inlet of the compressor 11.

[0066] When hot water is operated alone, the reversing valve 18 keeps the second refrigerant outlet 132 in communication with the four-way valve 16, and the full heat of the refrigerant is exchanged in the heat recovery heat exchanger 12, i.e. in the pure hot water mode, the refrigerant forms a fourth flow path from the outlet of the compressor 11, through the first switch valve 17, the first refrigerant inlet 121, the first refrigerant outlet 122, the second refrigerant inlet 131, the third refrigerant outlet 133, the outdoor heat exchanger 14, the four-way valve 16, and the inlet of the compressor 11.

[0067] In the heating and hot water mode and the pure hot water mode, the reversing valve 18 keeps the second refrigerant outlet 132 of the high-pressure gas-liquid separator 13 in communication with the four-way valve 16, so that the reversing valve 18 does not need to be actuated when switching between the two modes, and only the four-way valve 16 needs to be actuated. The gas-liquid separation of the high-pressure gas-liquid separator 13 can realize the automatic flow direction of the refrigerant when switching between the two modes, thereby improving the stability of the system.

[0068] For example, the heat recovery heat exchanger 12 is a double-pipe heat exchanger, the outdoor-side heat exchanger 14 is a finned heat exchanger, the indoor unit 15 is a ducted-type air conditioner, which includes an indoor-side heat exchanger (such as a finned heat exchanger) and a fan, and the first on-off valve 17 is a two-way valve. The double-pipe heat exchanger, the finned heat exchanger, the ducted-type air conditioner and the two-way valve are merely examples and are not intended to limit the present application.

[0069] It should be noted that the phrase "all the heat is exchanged in the heat recovery heat exchanger 12" means that all the refrigerant is in liquid state after being exchanged in the heat recovery heat exchanger 12, and the phrase "part of the heat is exchanged in the heat recovery heat exchanger 12" means that part of the refrigerant is in gaseous state after being exchanged in the heat recovery heat exchanger 12.

[0070] In some embodiments, as shown in Figure 1 and Figure 2 The outdoor-side heat exchanger 14 is configured to exchange heat between the refrigerant and outdoor air, and includes a first refrigerant port 141 and a second refrigerant port 142 connected to the first refrigerant port 141. The indoor unit 15 is configured to exchange heat between the refrigerant and indoor air, and includes a third refrigerant port 151 and a fourth refrigerant port 152 connected to the third refrigerant port 151.

[0071] The outlet of the compressor 11 is connected to the first refrigerant inlet 121 via the first on-off valve 17, and the outlet of the compressor 11 is connected to the four-way valve 16 via the reversing valve 18. The four-way valve 16 is connected to the first refrigerant port 141, the third refrigerant port 151 and the inlet of the compressor 11. The first refrigerant outlet 122 is connected to the second refrigerant inlet 131. The second refrigerant outlet 132 is connected to the four-way valve 16 via the reversing valve 18. The third refrigerant outlet 133 is connected to the second refrigerant port 142 and the fourth refrigerant port 152, and the second refrigerant port 142 is connected to the fourth refrigerant port 152.

[0072] In some embodiments, as shown in Figure 1 and Figure 2 The reversing valve 18 includes a first valve port 181, a second valve port 182 and a third valve port 183. The first valve port 181 is connected to the second refrigerant outlet 132, the second valve port 182 is connected to the four-way valve 16, and the third valve port 183 is connected to the outlet of the compressor 11.

[0073] When the refrigeration and hot water production are simultaneously operated, the heating and hot water production are simultaneously operated, and the hot water production is independently operated, the first valve port 181 and the second valve port 182 are communicated, that is, the second refrigerant outlet 132 and the four-way valve 16 are communicated.

[0074] When the third valve port 183 and the second valve port 182 are communicated, the outlet of the compressor 11 and the four-way valve 16 are communicated.

[0075] For example, the reversing valve 18 is a three-way valve, which is only an example and does not limit the application, and can also be other.

[0076] In some embodiments, as shown in Figure 1 and Figure 2 The four-way valve 16 includes a fourth valve port 161, a fifth valve port 162, a sixth valve port 163, and a seventh valve port 164. The fourth valve port 161 is connected with the reversing valve 18 (specifically, the second valve port 182 of the reversing valve 18), the fifth valve port 162 is connected with the outdoor heat exchanger 14 (specifically, the first refrigerant port 141 of the outdoor heat exchanger 14), the sixth valve port 163 is connected with the inlet of the compressor 11, and the seventh valve port 164 is connected with the indoor unit 15 (specifically, the third refrigerant port 151 of the indoor unit 15).

[0077] When the fourth valve port 161 and the fifth valve port 162 are communicated, the reversing valve 18 and the outdoor heat exchanger 14 are communicated, specifically, the second valve port 182 of the reversing valve 18 and the first refrigerant port 141 of the outdoor heat exchanger 14 are communicated.

[0078] When the fourth valve port 161 and the seventh valve port 164 are communicated, the reversing valve 18 and the indoor unit 15 are communicated, specifically, the second valve port 182 of the reversing valve 18 and the third refrigerant port 151 of the indoor unit 15 are communicated.

[0079] When the fifth valve port 162 and the sixth valve port 163 are communicated, the outdoor heat exchanger 14 (specifically, the first refrigerant port 141 of the outdoor heat exchanger 14) and the inlet of the compressor 11 are communicated.

[0080] When the seventh valve port 164 and the sixth valve port 163 are communicated, the indoor unit 15 (specifically, the third refrigerant port 151 of the indoor unit 15) and the inlet of the compressor 11 are communicated.

[0081] In some embodiments, as shown in Figure 1 and Figure 2As shown, the heat recovery heat pump system further comprises a first throttling device 19 for throttling and cooling the refrigerant. The third refrigerant outlet 133 is connected to the outdoor-side heat exchanger 14 and the indoor unit 15 via the first throttling device 19, specifically, the third refrigerant outlet 133 is connected to the second refrigerant port 142 of the outdoor-side heat exchanger 14 and the fourth refrigerant port 152 of the indoor unit 15 via the first throttling device 19. For example, the first throttling device 19 is an electronic expansion valve or a thermal expansion valve. Here, the electronic expansion valve and the thermal expansion valve are only examples and do not limit the present application. Other throttling devices can also be used.

[0082] In some embodiments, as shown in Figure 1 and Figure 2 As shown, the heat recovery heat exchanger 12 further comprises a first water inlet 123 and a first water outlet 124 connected to the first water inlet 123. The heat recovery heat pump system further comprises the domestic water tank 20, which comprises a cold water inlet 201, a first water outlet 202, a first water return port 203, and a hot water outlet 204. The first water outlet 202 is connected to the first water inlet 123, and the first water outlet 124 is connected to the first water return port 203.

[0083] In some embodiments, as shown in Figure 1 and Figure 2 As shown, the heat recovery heat pump system further comprises a first water pump 21 arranged in the water inlet pipeline (i.e., the pipeline connecting the first water outlet 202 and the first water inlet 123) or the water outlet pipeline (i.e., the pipeline connecting the first water outlet 124 and the first water return port 203) of the heat recovery heat exchanger 12. The first water pump 21 is used to provide power for water circulation between the heat recovery heat exchanger 12 and the domestic water tank 20.

[0084] In some embodiments, the heat recovery heat exchanger 12, the domestic water tank 20, and the first water pump 21 can be integrated into a domestic hot water module. Users can assemble the pipelines at the first on-off valve 17 and the second refrigerant inlet 131 according to actual needs.

[0085] In some embodiments, as shown in Figure 1 and Figure 2As shown, the heat recovery heat pump system further comprises a gas pipe 22, a liquid pipe 23 and at least two indoor units 15. Among each of the indoor units 15, the third refrigerant port 151 is connected with a corresponding branch interface end in the gas pipe 22, and the fourth refrigerant port 152 is connected with a corresponding branch interface end in the liquid pipe 23. The total interface end of the liquid pipe 23 is connected with the third refrigerant outlet 133 and the second refrigerant port 142, wherein the total interface end of the liquid pipe 23 is specifically connected with the third refrigerant outlet 133 through the first throttling device 19. The total interface end of the gas pipe 22 is connected with the four-way valve 16 (specifically the seventh valve port 164 of the four-way valve 16).

[0086] As shown in some embodiments, Figure 1 and Figure 2 As shown, the heat recovery heat pump system further comprises a second switch valve 24, a third switch valve 25, a fourth switch valve 26 and a fifth switch valve 27. Among them, the second switch valve 24 is arranged on the pipeline between the first switch valve 17 and the first refrigerant inlet 121. The third switch valve 25 is arranged on the pipeline between the first refrigerant outlet 122 and the second refrigerant inlet 131. One end of the fourth switch valve 26 is connected with the third refrigerant outlet 133 and the second refrigerant port 142, and the other end of the fourth switch valve 26 is connected with the total interface end of the liquid pipe 23. The fifth switch valve 27 is arranged on the pipeline between the total interface end of the gas pipe 22 and the four-way valve 16 (specifically the seventh valve port 164 of the four-way valve 16).

[0087] As shown in some embodiments, Figure 1 and Figure 2 As shown, the heat recovery heat pump system further comprises a second throttling device 28 arranged corresponding to each of the indoor units 15, which is used for throttling and cooling the refrigerant. Among them, the second throttling device 28 is arranged on the pipeline at the fourth refrigerant port 152, that is, the fourth refrigerant port 152 is connected with the corresponding branch interface end in the liquid pipe 23 through the second throttling device 28. For example, the second throttling device 28 is an electronic expansion valve or a thermal expansion valve, which is only an example and does not limit the present application, and can also be other.

[0088] In some embodiments, the heat recovery heat pump system further comprises a fresh air module arranged corresponding to each of the indoor units 15, which is used for introducing fresh outdoor air and discharging indoor dirty air.

[0089] As shown in some embodiments, Figure 1 and Figure 2As shown, the heat recovery heat pump system further comprises at least one heat exchanger 29 for achieving heat exchange between refrigerant and water in the terminal 31, the heat exchanger 29 comprising a fifth refrigerant port 291 and a sixth refrigerant port 292 in communication with the fifth refrigerant port 291. The fifth refrigerant port 291 is connected to the corresponding tapping end in the gas pipe 22, and the sixth refrigerant port 292 is connected to the corresponding tapping end in the liquid pipe 23. It can be understood that the at least one can be one, two, three or any number.

[0090] As shown in some embodiments, Figure 1 and Figure 2 As shown, the heat recovery heat pump system further comprises a third throttling device 30 for throttling and cooling the refrigerant. The sixth refrigerant port 292 is connected to the corresponding tapping end in the liquid pipe 23 through the third throttling device 30. For example, the third throttling device 30 is an electronic expansion valve or a thermal expansion valve, which are only examples and do not limit the present application, and can also be other.

[0091] As shown in some embodiments, Figure 1 and Figure 2 As shown, the heat exchanger 29 further comprises a second water inlet 293 and a second water outlet 294 in communication with the second water inlet 293. The heat recovery heat pump system further comprises the terminal 31, which comprises a second water outlet 311 and a second water inlet 312, the second water outlet 311 being connected to the second water inlet 293, and the second water outlet 294 being connected to the second water inlet 312. For example, the terminal 31 is a ground pipe, which realizes the effect of floor heating or ground cooling through heat exchange with the heat exchanger 29, which is only an example and does not limit the present application, and can also be other.

[0092] As shown in some embodiments, Figure 1 and Figure 2 As shown, the heat recovery heat pump system further comprises a second water pump 32 arranged in the water inlet pipeline (i.e. the pipeline connecting the second water outlet 311 to the second water inlet 293) or the water outlet pipeline (i.e. the pipeline connecting the second water outlet 294 to the second water inlet 312) of the terminal 31, and the second water pump 32 is used to provide power for water circulation between the heat exchanger 29 and the terminal 31.

[0093] In some embodiments, the heat exchanger 29, the third throttling device 30 and the second water pump 32 can be integrated into a hydraulic module, which can be assembled on the gas pipe 22 and the liquid pipe 23 according to requirements. In addition, the indoor unit 15 and the hydraulic module can be operated alternatively or simultaneously.

[0094] In some embodiments, as shown in Figure 1 the heat recovery heat pump system further comprises an economic module, which is configured to reduce the temperature of the refrigerant entering the outdoor heat exchanger 14, thereby improving the heat absorption performance of the outdoor heat exchanger 14 in a low temperature environment and improving the subsequent heating effect.

[0095] The first end of the economic module is connected to the indoor unit 15 (specifically, the fourth refrigerant port 152 of the indoor unit 15), and the second end of the economic module is connected to the outdoor heat exchanger 14 (specifically, the second refrigerant port 142 of the outdoor heat exchanger 14) and the third refrigerant outlet 133. Specifically, the first end of the economic module is connected to the fourth refrigerant port 152 through the fourth switch valve 26, the liquid pipe 23 and the second throttling device 28, and the second end of the economic module is connected to the third refrigerant outlet 133 through the first throttling device 19.

[0096] In other embodiments, as shown in Figure 2 the heat recovery heat pump system further comprises an economic module and a liquid storage container 33. The first interface 331 of the liquid storage container 33 is connected to the indoor unit 15 (specifically, the fourth refrigerant port 152 of the indoor unit 15), and the third refrigerant outlet 133 is connected to the pipeline between the first interface 331 of the liquid storage container 33 and the fourth refrigerant port 152 of the indoor unit 15. The second interface 332 of the liquid storage container 33 is connected to the first end of the economic module, and the second end of the economic module is connected to the outdoor heat exchanger 14 (specifically, the second refrigerant port 142 of the outdoor heat exchanger 14). Specifically, the first interface 331 of the liquid storage container 33 is connected to the fourth refrigerant port 152 through the fourth switch valve 26, the liquid pipe 23 and the second throttling device 28, and the third refrigerant outlet 133 is connected to the pipeline between the first interface 331 of the liquid storage container 33 and the third switch valve 25 through the first throttling device 19.

[0097] In some embodiments, as shown in Figure 1 and Figure 2As shown, the economizer module includes an economizer 34 and a fourth throttling device 35. The economizer 34 includes a seventh refrigerant port 341, an eighth refrigerant port 342, a ninth refrigerant port 343 in communication with the seventh refrigerant port 341, and a tenth refrigerant port 344 in communication with the eighth refrigerant port 342. For example, the economizer 34 is a heat exchanger, and the fourth throttling device 35 is an electronic expansion valve or a thermal expansion valve. Here, the electronic expansion valve and the thermal expansion valve are merely examples and do not limit the present application.

[0098] The second end of the economizer module is the ninth refrigerant port 343. The first end of the economizer module is divided into two paths. One path is connected to the second refrigerant port 142 via the main refrigerant path (i.e., the seventh refrigerant port 341 and the ninth refrigerant port 343 in sequence). The other path is connected to the inlet of the compressor 11 via the auxiliary refrigerant path (the second throttling device 28, the eighth refrigerant port 342, and the tenth refrigerant port 344 in sequence).

[0099] In this embodiment, the economizer module is added at the outlet of the indoor unit 15. The refrigerant from the indoor unit 15 passes through the main refrigerant path and the auxiliary refrigerant path. The refrigerant in the auxiliary refrigerant path is throttled and cooled by the fourth throttling device 35, and then absorbs the heat of the refrigerant in the main refrigerant path in the economizer 34 more efficiently. The temperature of the refrigerant entering the outdoor heat exchanger 14 is lower, especially in cold winter, which can make the temperature of the refrigerant lower than the outdoor temperature. Therefore, the heat absorption performance of the outdoor heat exchanger 14 in a low-temperature environment is improved, and the subsequent heating effect is improved.

[0100] In some embodiments, as shown in Figure 2 and Figure 1 As shown, the heat recovery heat pump system further includes a fifth throttling device 36. The second end of the economizer module (specifically, the ninth refrigerant port 343 of the economizer 34) is connected to the outdoor heat exchanger 14 (specifically, the second refrigerant port 142 of the outdoor heat exchanger 14) via the fifth throttling device 36. For example, the fifth throttling device 36 is an electronic expansion valve or a thermal expansion valve. Here, the electronic expansion valve and the thermal expansion valve are merely examples and do not limit the present application.

[0101] In this embodiment, the fifth throttling device 36 can further reduce the temperature of the refrigerant entering the outdoor heat exchanger 14.

[0102] The heat recovery heat pump system further comprises a one-way valve 37, the outdoor-side heat exchanger 14 (specifically, the second refrigerant port 142 of the outdoor-side heat exchanger 14) is further connected to the second end of the economizer module (specifically, the ninth refrigerant port 343 of the economizer 34) through the one-way valve 37, and the conduction direction of the one-way valve 37 is towards the second end of the economizer module. It should be noted that the direction of the one-way valve 37 refers to the flow direction of the refrigerant, not the spatial position direction.

[0103] In some embodiments, as shown in Figure 1 and Figure 1 The heat recovery heat pump system further comprises a low-pressure gas-liquid separator 40 for separating gaseous refrigerant and liquid refrigerant, the low-pressure gas-liquid separator 40 is arranged at the inlet end of the compressor 11, and the tenth refrigerant port 344 is connected to the low-pressure gas-liquid separator 40.

[0104] In some embodiments, as shown in Figure 3 and Figure 4 The heat recovery heat pump system further comprises an oil separator 41 and an oil return pipe 42, the oil separator 41 is arranged at the outlet end of the compressor 11, the oil separator 41 is used to separate the lubricating oil from the compressor 11 mixed in the refrigerant, and the lubricating oil is returned to the compressor 11 through the oil return pipe 42.

[0105] In some embodiments, as shown in Figure 4 The compressor 11, the high-pressure gas-liquid separator 13, the outdoor-side heat exchanger 14, the four-way valve 16, the first switch valve 17, the reversing valve 18, the first throttling device 19, the second switch valve 24, the third switch valve 25, the fourth switch valve 26, the fifth switch valve 27, the second throttling device 28, the economizer 34, the fourth throttling device 35, the fifth throttling device 36, the one-way valve 37, the low-pressure gas-liquid separator 40, the oil separator 41, and the oil return pipe 42 are integrated in an outdoor main unit.

[0106] In some embodiments, as shown in Figure 3 The compressor 11, the high-pressure gas-liquid separator 13, the outdoor-side heat exchanger 14, the four-way valve 16, the first switch valve 17, the reversing valve 18, the first throttling device 19, the second switch valve 24, the third switch valve 25, the fourth switch valve 26, the fifth switch valve 27, the second throttling device 28, the economizer 34, the fourth throttling device 35, the fifth throttling device 36, the one-way valve 37, the low-pressure gas-liquid separator 40, the oil separator 41, and the oil return pipe 42 are integrated in an outdoor main unit.

[0107] Completely, in some embodiments, such as Figure 4 As shown, the connection relationships between the components in the heat recovery heat pump system are as follows:

[0108] One outlet of the compressor 11 is connected to the first refrigerant inlet 121 via the first switching valve 17 and the second switching valve 24. The other outlet of the compressor 11 is connected to the third valve port 183 of the first reversing valve 18. The first refrigerant outlet 122 is connected to the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 via the third switching valve 25. The second refrigerant outlet 132 of the high-pressure gas-liquid separator 13 is connected to the first valve port 181 of the first reversing valve 18. The first port 331 of the liquid storage container 33 is connected to the main port of the liquid pipe 23 via the fourth switching valve 26. The third refrigerant outlet 133 of the high-pressure gas-liquid separator 13 is connected between the fourth switching valve 26 and the first port 331 of the liquid storage container 33 via the first throttling device 19. The second valve port 182 of the first reversing valve 18 is connected to the fourth valve port 161 of the four-way valve 16. The fifth port 162 of the four-way valve 16 is connected to the first refrigerant port 141 of the outdoor heat exchanger 14. The sixth port 163 of the four-way valve 16 is connected to the inlet of the compressor 11 via the low-pressure gas-liquid separator 40. The seventh port 164 of the four-way valve 16 is connected to the main interface of the gas pipe 22 via the fifth switching valve 27. One path of the second port 332 of the liquid storage container 33 is connected to the seventh refrigerant port 341 of the economizer 34, and the other path of the second port 332 of the liquid storage container 33 is connected to the eighth refrigerant port 342 of the economizer 34 via the fourth throttling device 35. The ninth refrigerant port 343 of the economizer 34 is connected to the second refrigerant port 142 of the outdoor heat exchanger 14 via the fifth throttling device 36. The other connection of the ninth refrigerant port 343 of the economizer 34 is also connected to the second refrigerant port 142 of the outdoor heat exchanger 14 via the one-way valve 37, with the one-way valve 37 oriented towards the ninth refrigerant port 343 of the economizer 34. The tenth refrigerant port 344 of the economizer 34 is connected to the inlet of the compressor 11 via the low-pressure gas-liquid separator 40.

[0109] The first outlet 202 of the domestic water tank 20 is connected to the first water inlet 123 of the heat recovery heat exchanger 12 via the first water pump 21, and the first water outlet 124 of the heat recovery heat exchanger 12 is connected to the first return water inlet 203 of the domestic water tank 20.

[0110] The third refrigerant port 151 of the indoor unit 15 is connected to the corresponding tapping end in the gas pipe 22, and the fourth refrigerant port 152 of the indoor unit 15 is connected to the corresponding tapping end in the liquid pipe 23 through the second throttling device 28.

[0111] The fifth refrigerant port 291 of the heat exchanger 29 is connected to the corresponding tapping end in the gas pipe 22, and the sixth refrigerant port 292 of the heat exchanger 29 is connected to the corresponding tapping end in the liquid pipe 23 through the third throttling device 30. The second water outlet 311 of the terminal 31 is connected to the second water inlet 293 of the heat exchanger 29 through the second water pump 32, and the second water outlet 294 of the heat exchanger 29 is connected to the second water return port 312 of the terminal 31.

[0112] In some embodiments, as shown in FIG. 1, the connection relationship between the components in the heat recovery heat pump system is as follows: Figure 3

[0113] ​The outlet of the compressor 11 is connected to the first refrigerant inlet 121 via the first switch valve 17 and the second switch valve 24, and is also connected to the third valve port 183 of the first reversing valve 18. The first refrigerant outlet 122 is connected to the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 via the third switch valve 25. The second refrigerant outlet 132 of the high-pressure gas-liquid separator 13 is connected to the first valve port 181 of the first reversing valve 18. The third refrigerant outlet 133 of the high-pressure gas-liquid separator 13 is connected to the ninth refrigerant port 343 of the economizer 34 via the first throttling device 19. The second valve port 182 of the first reversing valve 18 is connected to the fourth valve port 161 of the four-way valve 16. The fifth valve port 162 of the four-way valve 16 is connected to the first refrigerant port 141 of the outdoor heat exchanger 14. The sixth valve port 163 of the four-way valve 16 is connected to the inlet of the compressor 11 via the low-pressure gas-liquid separator 40. The seventh valve port 164 of the four-way valve 16 is connected to the total interface end of the gas pipe 22 via the fifth switch valve 27. The total interface end of the liquid pipe 23 is connected to the seventh refrigerant port 341 of the economizer 34 via the fourth switch valve 26, and is also connected to the eighth refrigerant port 342 of the economizer 34 via the fourth throttling device 35. The ninth refrigerant port 343 of the economizer 34 is connected to the second refrigerant port 142 of the outdoor heat exchanger 14 via the fifth throttling device 36, and is also connected to the second refrigerant port 142 of the outdoor heat exchanger 14 via the check valve 37, the check valve 37 being directed towards the ninth refrigerant port 343 of the economizer 34. The tenth refrigerant port 344 of the economizer 34 is connected to the inlet of the compressor 11 via the low-pressure gas-liquid separator 40.

[0114] The first water outlet 202 of the domestic water tank 20 is connected to the first water inlet 123 of the heat recovery heat exchanger 12 via the first water pump 21, and the first water outlet 124 of the heat recovery heat exchanger 12 is connected to the first water return port 203 of the domestic water tank 20.

[0115] The third refrigerant port 151 of the indoor unit 15 is connected to the corresponding branch interface end of the gas pipe 22, and the fourth refrigerant port 152 of the indoor unit 15 is connected to the corresponding branch interface end of the liquid pipe 23 via the second throttling device 28.

[0116] The fifth refrigerant port 291 of the heat exchanger 29 is connected to the corresponding tapping end in the gas pipe 22, and the sixth refrigerant port 292 of the heat exchanger 29 is connected to the corresponding tapping end in the liquid pipe 23 through the third throttling device 30. The second water outlet 311 of the terminal 31 is connected to the second water inlet 293 of the heat exchanger 29 through the second water pump 32, and the second water outlet 294 of the heat exchanger 29 is connected to the second water return port 312 of the terminal 31. Figure 5 With Figure 5 The difference is that, Figure 4 There is an additional liquid storage container 33.

[0117] In different cases, the heat recovery heat pump system will correspond to different valve port communications. Below, the refrigerant flow direction of each mode will be illustrated with reference to the heat recovery heat pump system shown in Figure 5 The specific modes are as follows:

[0118] As Figure 6As shown, in the refrigeration and full heat recovery hot water mode, the first throttling device 19, the second throttling device 28, the third throttling device 30, the first on-off valve 17, the second on-off valve 24, the third on-off valve 25, the fourth on-off valve 26 and the fifth on-off valve 27 are opened, the first valve port 181 of the reversing valve 18 is connected with the second valve port 182, and the seventh valve port 164 of the four-way valve 16 is connected with the sixth valve port 163. That is, when hot water needs to be prepared quickly in the refrigeration mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 through the first on-off valve 17 and the second on-off valve 24, exchanges heat with the water in the hot water tank 20 in the heat recovery heat exchanger 12, and becomes medium-temperature liquid refrigerant after preparing hot water, the medium-temperature liquid refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third on-off valve 25, and is further separated into gas and liquid in the high-pressure gas-liquid separator 13 to ensure that the refrigerant output from the third refrigerant outlet 133 is pure liquid. The medium-temperature liquid refrigerant output from the third refrigerant outlet 133 becomes low-temperature liquid refrigerant after being throttled and cooled by the first throttling device 19, then enters the liquid pipe 23 through the fourth on-off valve 26, enters the second throttling device 28 in the liquid pipe 23, becomes low-temperature liquid refrigerant after being throttled and cooled by the second throttling device 28, then enters the fourth refrigerant port 152 of the indoor unit 15, exchanges heat with indoor air in the indoor unit 15, and evaporates into low-temperature gaseous refrigerant after absorbing heat from the indoor air, the indoor unit 15 blows out cold air, and the low-temperature gaseous refrigerant output from the third refrigerant port 151 of the indoor unit 15 enters the gas pipe 22. Moreover, the medium-temperature liquid refrigerant enters the third throttling device 30 in the liquid pipe 23, becomes low-temperature liquid refrigerant after being throttled and cooled by the third throttling device 30, then enters the sixth refrigerant port 292 of the heat exchanger 29, exchanges heat with the water in the terminal 31 in the heat exchanger 29, and evaporates into low-temperature gaseous refrigerant after absorbing heat from the water, the water in the terminal 31 becomes cold water, and the low-temperature gaseous refrigerant output from the fifth refrigerant port 291 of the heat exchanger 29 enters the gas pipe 22. The low-temperature gaseous refrigerant output from the gas pipe 22 returns to the inlet of the compressor 11 through the fifth on-off valve 27, the seventh valve port 164 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40, and reciprocally circulates.

[0119] The heat recovery heat exchanger 12 is connected to the domestic water tank 20, so that all the condensation heat originally used for heat exchange with air by the outdoor heat exchanger 14 is recovered during refrigeration, avoiding waste of heat by heat exchange between the outdoor heat exchanger 14 and air, and the recovered heat is exchanged with water in the domestic water tank 20 in the heat recovery heat exchanger 12, so that hot water is quickly prepared, energy utilization is improved, and the hot water preparation speed is improved. And by configuring the heat exchanger 29 and the end 31, so that cooling and other effects can be achieved at the same time during refrigeration, improving energy utilization.

[0120] When the domestic hot water reaches a certain temperature, it can be switched to a refrigeration and partial heat recovery domestic hot water mode, such as Figure 7As shown, in the refrigeration and partial heat recovery hot water production mode, the second throttling device 28, the third throttling device 30, the first switch valve 17, the second switch valve 24, the third switch valve 25, the fourth switch valve 26 and the fifth switch valve 27 are opened, the first valve port 181 of the reversing valve 18 is communicated with the second valve port 182, the fourth valve port 161 of the four-way valve 16 is communicated with the fifth valve port 162, and the seventh valve port 164 of the four-way valve 16 is communicated with the sixth valve port 163. That is, when hot water needs to be produced in the refrigeration mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 through the first switch valve 17 and the second switch valve 24, and the high-temperature gaseous refrigerant exchanges heat with the water in the water tank 20 in the heat recovery heat exchanger 12 to produce hot water and become medium-temperature gaseous refrigerant. The medium-temperature gaseous refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third switch valve 25, and the medium-temperature gaseous refrigerant is further separated into gas and liquid in the high-pressure gas-liquid separator 13 to ensure that the refrigerant output from the second refrigerant outlet 132 is pure gas. The medium-temperature gaseous refrigerant output from the second refrigerant outlet 132 enters the first refrigerant port 141 of the outdoor heat exchanger 14 through the first valve port 181 and the second valve port 182 of the reversing valve 18 and the fourth valve port 161 and the fifth valve port 162 of the four-way valve 16, and the medium-temperature gaseous refrigerant becomes medium-temperature liquid refrigerant after being condensed and releasing heat in the outdoor heat exchanger 14. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 enters the second interface 332 of the liquid storage container 33 through the one-way valve 37, the ninth refrigerant port 343 and the seventh refrigerant port 341 of the economizer 34, and the medium-temperature liquid refrigerant output from the first interface 331 of the liquid storage container 33 enters the liquid pipe 23 through the fourth switch valve 26. The medium-temperature liquid refrigerant enters the second throttling device 28 in the liquid pipe 23, becomes low-temperature liquid refrigerant after throttling and cooling by the second throttling device 28, and then enters the fourth refrigerant port 152 of the indoor unit 15. The low-temperature liquid refrigerant exchanges heat with indoor air in the indoor unit 15, and the low-temperature liquid refrigerant absorbs heat from the indoor air to evaporate into low-temperature gaseous refrigerant. The indoor unit 15 blows cold air, and the low-temperature gaseous refrigerant output from the third refrigerant port 151 of the indoor unit 15 enters the gas pipe 22.And, the medium temperature liquid refrigerant in the liquid pipe 23 enters the third throttling device 30, and becomes low temperature liquid refrigerant with lower temperature after throttling and cooling by the third throttling device 30, then enters the sixth refrigerant port 292 of the heat exchanger 29, and the low temperature liquid refrigerant exchanges heat with the water in the terminal 31 in the heat exchanger 29, and the low temperature liquid refrigerant evaporates into low temperature gaseous refrigerant after absorbing the heat of the water, and the water in the terminal 31 becomes cold water, and the low temperature gaseous refrigerant output by the fifth refrigerant port 291 of the heat exchanger 29 enters the gas pipe 22. The low temperature gaseous refrigerant output by the gas pipe 22 returns to the inlet of the compressor 11 after the fifth switch valve 27, the seventh valve port 164 and the sixth valve port 163 of the four-way valve 16 and the low pressure gas-liquid separator 40, and reciprocates.

[0121] The heat recovery heat exchanger 12 is connected with the water tank 20, so that at least part of the condensation heat of the outdoor heat exchanger 14 originally used for heat exchange with air is recovered and utilized, and the heat is not wasted by heat exchange between the outdoor heat exchanger 14 and air, and the recovered heat is exchanged with the water in the water tank 20 in the heat recovery heat exchanger 12, so that hot water is quickly prepared, the energy utilization rate is improved, and the hot water preparation speed is improved. And by configuring the heat exchanger 29 and the terminal 31, the effect of ground cooling and the like can be achieved at the same time of refrigeration, and the energy utilization rate is improved.

[0122] Specifically, Figure 7 And Figure 6 The difference between the embodiments shown in the drawings is that, Figure 7 In order to recover and utilize at least part of the condensation heat of the outdoor heat exchanger 14 originally used for heat exchange with air, and Figure 8 In order to recover and utilize all of the condensation heat of the outdoor heat exchanger 14 originally used for heat exchange with air.

[0123] As Figure 9As shown, in the refrigeration and partial heat recovery hot water production mode, the second throttling device 28, the third throttling device 30, the first switch valve 17, the second switch valve 24, the third switch valve 25, the fourth switch valve 26 and the fifth switch valve 27 are opened, the second valve port 182 of the reversing valve 18 is connected with the first valve port 181 and the third valve port 183, the fourth valve port 161 of the four-way valve 16 is connected with the fifth valve port 162, and the seventh valve port 164 of the four-way valve 16 is connected with the sixth valve port 163. That is, when hot water is needed in the refrigeration mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 through the first switch valve 17 and the second switch valve 24, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant port 141 of the outdoor heat exchanger 14 through the third valve port 183 and the second valve port 182 of the reversing valve 18 and the fourth valve port 161 and the fifth valve port 162 of the four-way valve 16. The high-temperature gaseous refrigerant exchanges heat with the water in the water tank 20 in the heat recovery heat exchanger 12, becomes medium-temperature gaseous refrigerant after producing hot water, and the medium-temperature gaseous refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third switch valve 25, and is further separated into gas and liquid in the high-pressure gas-liquid separator 13 to ensure that the refrigerant output from the second refrigerant outlet 132 is pure gas. The medium-temperature gaseous refrigerant output from the second refrigerant outlet 132 enters the first refrigerant port 141 of the outdoor heat exchanger 14 through the first valve port 181 and the second valve port 182 of the reversing valve 18 and the fourth valve port 161 and the fifth valve port 162 of the four-way valve 16, and becomes medium-temperature liquid refrigerant after condensing and releasing heat in the outdoor heat exchanger 14. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 enters the second interface 332 of the storage container 33 through the check valve 37, the ninth refrigerant port 343 and the seventh refrigerant port 341 of the economizer 34, the medium-temperature liquid refrigerant output from the first interface 331 of the storage container 33 enters the liquid pipe 23 through the fourth switch valve 26, becomes low-temperature liquid refrigerant after throttling and cooling in the second throttling device 28, and then enters the fourth refrigerant port 152 of the indoor unit 15, the low-temperature liquid refrigerant exchanges heat with indoor air in the indoor unit 15, and the low-temperature liquid refrigerant absorbs heat from the indoor air to evaporate into low-temperature gaseous refrigerant, the indoor unit 15 blows cold air, and the low-temperature gaseous refrigerant output from the third refrigerant port 151 of the indoor unit 15 enters the gas pipe 22.And, the medium temperature liquid refrigerant enters into the third throttling device 30 in the liquid pipe 23, becomes low temperature liquid refrigerant with lower temperature after throttling and cooling by the third throttling device 30, then enters into the sixth refrigerant port 292 of the heat exchanger 29, and the low temperature liquid refrigerant exchanges heat with the water in the terminal 31 in the heat exchanger 29, and the low temperature liquid refrigerant evaporates into low temperature gaseous refrigerant after absorbing the heat of the water, and the water in the terminal 31 becomes cold water, and the low temperature gaseous refrigerant output by the fifth refrigerant port 291 of the heat exchanger 29 enters into the gas pipe 22. The low temperature gaseous refrigerant output by the gas pipe 22 returns to the inlet of the compressor 11 after passing through the fifth switch valve 27, the seventh valve port 164 and the sixth valve port 163 of the four-way valve 16 and the low pressure gas-liquid separator 40, and reciprocates and circulates.

[0124] Specifically, Figure 10 And Figure 2 The difference between the embodiment shown in the figure and the embodiment shown in the figure is that, Figure 1 In the embodiment shown in the figure, one more refrigerant enters into the outdoor heat exchanger 14 through the third valve port 183 and the second valve port 182 of the reversing valve 18 and the fourth valve port 161 and the fifth valve port 162 of the four-way valve 16, which can better control the amount of refrigerant entering into the heat recovery heat exchanger 12, and the refrigerant coming out of the compressor 11 directly reaches the four-way valve 16, which can ensure that the refrigerant is pure gaseous refrigerant, and the pure gaseous refrigerant can ensure that the four-way valve 16 has enough pressure difference for reversing, so the pressure loss of the refrigerant pipeline is smaller.

[0125] As Figure 2As shown, in the heating and hot water mode, the first throttling device 19, the second throttling device 28, the third throttling device 30, the fourth throttling device 35, the fifth throttling device 36, the first on-off valve 17, the second on-off valve 24, the third on-off valve 25, the fourth on-off valve 26 and the fifth on-off valve 27 are opened, the first valve port 181 of the reversing valve 18 is communicated with the second valve port 182, the fourth valve port 161 of the four-way valve 16 is communicated with the seventh valve port 164, and the fifth valve port 162 of the four-way valve 16 is communicated with the sixth valve port 163. That is, when hot water needs to be prepared in the heating mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 through the first on-off valve 17 and the second on-off valve 24, and the high-temperature gaseous refrigerant exchanges heat with the water in the water tank 20 to become medium-temperature gaseous refrigerant after preparing hot water. The medium-temperature gaseous refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third on-off valve 25, and the medium-temperature gaseous refrigerant is further separated into gas and liquid in the high-pressure gas-liquid separator 13 to ensure that the refrigerant output from the second refrigerant outlet 132 is pure gas. The medium-temperature gaseous refrigerant output from the second refrigerant outlet 132 enters the gas pipe 22 through the first valve port 181 and the second valve port 182 of the reversing valve 18, the fourth valve port 161 and the seventh valve port 164 of the four-way valve 16, and the fifth on-off valve 27, and the medium-temperature gaseous refrigerant enters the third refrigerant port 151 of the indoor unit 15 in the gas pipe 22. The medium-temperature gaseous refrigerant exchanges heat with indoor air in the indoor unit 15, and the medium-temperature gaseous refrigerant condenses into medium-temperature liquid refrigerant after releasing heat to the indoor air. The indoor unit 15 blows hot air, and the medium-temperature liquid refrigerant output from the fourth refrigerant port 152 of the indoor unit 15 becomes low-temperature liquid refrigerant after throttling and cooling by the second throttling device 28, and then the low-temperature liquid refrigerant output from the second throttling device 28 enters the liquid pipe 23. Moreover, the medium-temperature gaseous refrigerant enters the fifth refrigerant port 291 of the heat exchanger 29 in the gas pipe 22, and the medium-temperature gaseous refrigerant exchanges heat with the water in the terminal 31 in the heat exchanger 29 to become medium-temperature liquid refrigerant, and the water in the terminal 31 becomes hot water. The medium-temperature liquid refrigerant output from the sixth refrigerant port 292 of the heat exchanger 29 becomes low-temperature liquid refrigerant after throttling and cooling by the third throttling device 30, and then the low-temperature liquid refrigerant output from the third throttling device 30 enters the liquid pipe 23. The low-temperature liquid refrigerant output from the liquid pipe 23 enters the first interface 331 of the liquid storage container 33 through the fourth on-off valve 26.The low-temperature liquid refrigerant output by the second interface 332 of the liquid storage container 33 enters the main refrigerant path and the auxiliary refrigerant path. The low-temperature liquid refrigerant in the auxiliary refrigerant path is throttled and cooled by the fourth throttling device 35 to become low-temperature liquid refrigerant with a lower temperature. The low-temperature liquid refrigerant with a lower temperature absorbs heat from the refrigerant in the main refrigerant path in the economizer 34 to become high-temperature gaseous refrigerant. The high-temperature gaseous refrigerant returns to the inlet of the compressor 11 through the low-pressure gas-liquid separator 40. The low-temperature liquid refrigerant from the main refrigerant path is cooled by heat exchange to become low-temperature liquid refrigerant with a lower temperature, and then enters the fifth throttling device 36 to be throttled and cooled to become low-temperature liquid refrigerant with a still lower temperature. The low-temperature liquid refrigerant enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output by the first refrigerant port 141 of the outdoor heat exchanger 14 returns to the inlet of the compressor 11 through the fifth valve port 162 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40, and then circulates repeatedly. The heat recovery heat pump system can produce hot water and realize floor heating and other effects while heating, thereby improving energy utilization.

[0126] As Figure 11As shown, in the heating and hot water mode, the first throttling device 19, the second throttling device 28, the third throttling device 30, the fourth throttling device 35, the fifth throttling device 36, the first on-off valve 17, the second on-off valve 24, the third on-off valve 25, the fourth on-off valve 26 and the fifth on-off valve 27 are opened, the second valve port 182 of the reversing valve 18 is communicated with the first valve port 181 and the third valve port 183, the fourth valve port 161 of the four-way valve 16 is communicated with the seventh valve port 164, and the fifth valve port 162 of the four-way valve 16 is communicated with the sixth valve port 163. That is, when hot water is needed in the heating mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 through the first on-off valve 17 and the second on-off valve 24, and the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the gas pipe 22 through the third valve port 183 and the second valve port 182 of the reversing valve 18, the fourth valve port 161 and the seventh valve port 164 of the four-way valve 16, and the fifth on-off valve 27. The high-temperature gaseous refrigerant exchanges heat with the water in the water tank 20 in the heat recovery heat exchanger 12, becomes medium-temperature gaseous refrigerant after preparing hot water, and the medium-temperature gaseous refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third on-off valve 25, and is further gas-liquid separated in the high-pressure gas-liquid separator 13 to ensure that the refrigerant output from the second refrigerant outlet 132 is pure gaseous. The medium-temperature gaseous refrigerant output from the second refrigerant outlet 132 enters the gas pipe 22 through the first valve port 181 and the second valve port 182 of the reversing valve 18, the fourth valve port 161 and the seventh valve port 164 of the four-way valve 16, and the fifth on-off valve 27, and enters the third refrigerant port 151 of the indoor unit 15 in the gas pipe 22. The medium-temperature gaseous refrigerant exchanges heat with indoor air in the indoor unit 15, and the medium-temperature gaseous refrigerant condenses into medium-temperature liquid refrigerant after releasing heat to the indoor air. The indoor unit 15 blows hot air, and the medium-temperature liquid refrigerant output from the fourth refrigerant port 152 of the indoor unit 15 becomes low-temperature liquid refrigerant after throttling and cooling by the second throttling device 28, and then the low-temperature liquid refrigerant output from the second throttling device 28 enters the liquid pipe 23. Moreover, the medium-temperature gaseous refrigerant enters the fifth refrigerant port 291 of the heat exchanger 29 in the gas pipe 22, and becomes medium-temperature liquid refrigerant after exchanging heat with the water in the terminal 31 in the heat exchanger 29, and the water in the terminal 31 becomes hot water. The medium-temperature liquid refrigerant output from the sixth refrigerant port 292 of the heat exchanger 29 becomes low-temperature liquid refrigerant after throttling and cooling by the third throttling device 30, and then the low-temperature liquid refrigerant output from the third throttling device 30 enters the liquid pipe 23.The low-temperature liquid refrigerant output by the liquid pipe 23 enters the first interface 331 of the liquid storage container 33 through the fourth switch valve 26, the low-temperature liquid refrigerant output by the second interface 332 of the liquid storage container 33 enters the main refrigerant line and the auxiliary refrigerant line, the low-temperature liquid refrigerant in the auxiliary refrigerant line is throttled and cooled by the fourth throttling device 35 to become low-temperature liquid refrigerant with a lower temperature, the low-temperature liquid refrigerant with a lower temperature absorbs heat from the main refrigerant line in the economizer 34 to become high-temperature gaseous refrigerant, and finally returns to the inlet of the compressor 11 through the low-pressure gas-liquid separator 40, while the low-temperature liquid refrigerant from the main refrigerant line is cooled by heat exchange to become low-temperature liquid refrigerant with a lower temperature, and then enters the fifth throttling device 36 to be throttled and cooled to become low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 142 of the outdoor heat exchanger 14, the low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become low-temperature gaseous refrigerant, the low-temperature gaseous refrigerant output by the first refrigerant port 141 of the outdoor heat exchanger 14 returns to the inlet of the compressor 11 through the fifth valve port 162 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40, and reciprocally circulates.

[0127] Specifically, Figure 12 and ​ The difference between the embodiment shown in the figure and the embodiment shown in the figure is that ​ In the embodiment shown in the figure, one more third valve port 183 and second valve port 182 of the reversing valve 18, fourth valve port 161 and seventh valve port 164 of the four-way valve 16 and fifth switch valve 27 enter the gas pipe 22, which can better control the amount of refrigerant entering the heat recovery heat exchanger 12, and the refrigerant directly from the compression to the four-way valve 16 can ensure that the refrigerant is gaseous, and pure gaseous refrigerant can better ensure that the four-way valve 16 has enough pressure difference for reversing, so the pressure loss of the refrigerant pipeline is smaller.

[0128] As ​As shown, when in the pure hot water mode, the first throttling device 19, the fourth throttling device 35, the fifth throttling device 36, the first on-off valve 17, the second on-off valve 24 and the third on-off valve 25 are opened, the first valve port 181 of the reversing valve 18 is communicated with the second valve port 182, and the fifth valve port 162 of the four-way valve 16 is communicated with the sixth valve port 163. That is, when only hot water is needed, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 through the first on-off valve 17 and the second on-off valve 24, and exchanges heat with the water in the domestic water tank 20 in the heat recovery heat exchanger 12, so as to become medium-temperature liquid refrigerant after preparing hot water. The medium-temperature liquid refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third on-off valve 25, and is further separated into gas and liquid in the high-pressure gas-liquid separator 13, so as to ensure that the refrigerant output from the third refrigerant outlet 133 is pure liquid. The medium-temperature liquid refrigerant output from the third refrigerant outlet 133 is throttled and cooled by the first throttling device 19 to become low-temperature liquid refrigerant with a lower temperature, and then enters the first interface 331 of the liquid storage container 33. The low-temperature liquid refrigerant output from the second interface 332 of the liquid storage container 33 enters the main refrigerant line and the auxiliary refrigerant line. The low-temperature liquid refrigerant in the auxiliary refrigerant line is throttled and cooled by the fourth throttling device 35 to become low-temperature liquid refrigerant with a lower temperature, which is heated in the economizer 34 to become high-temperature gaseous refrigerant, and finally returns to the inlet of the compressor 11 through the low-pressure gas-liquid separator 40. The low-temperature liquid refrigerant from the main refrigerant line is cooled by heat exchange to become low-temperature liquid refrigerant with a lower temperature, and then enters the fifth throttling device 36 for throttling and cooling, and becomes low-temperature liquid refrigerant with a lower temperature, and then enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become low-temperature gaseous refrigerant, which is output from the first refrigerant port 141 of the outdoor heat exchanger 14, and then returns to the inlet of the compressor 11 through the fifth valve port 162 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40, and reciprocally circulates.

[0129] As ​As shown, in the cooling mode, the second throttling device 28, the third throttling device 30, the fourth switch valve 26 and the fifth switch valve 27 are opened, the third valve port 183 of the reversing valve 18 is connected with the second valve port 182, the fourth valve port 161 of the four-way valve 16 is connected with the fifth valve port 162, and the seventh valve port 164 of the four-way valve 16 is connected with the sixth valve port 163. That is, when cooling in summer, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant port 141 of the outdoor heat exchanger 14 through the third valve port 183 and the second valve port 182 of the reversing valve 18 and the fourth valve port 161 and the fifth valve port 162 of the four-way valve 16, and the medium-temperature gaseous refrigerant becomes medium-temperature liquid refrigerant after being condensed and releasing heat in the outdoor heat exchanger 14. The medium-temperature liquid refrigerant output from the second refrigerant port 142 of the outdoor heat exchanger 14 enters the second interface 332 of the liquid accumulator 33 through the one-way valve 37, the ninth refrigerant port 343 and the seventh refrigerant port 341 of the economizer 34, the medium-temperature liquid refrigerant output from the first interface 331 of the liquid accumulator 33 enters the liquid pipe 23 through the fourth switch valve 26, enters the second throttling device 28 in the liquid pipe 23, becomes low-temperature liquid refrigerant after throttling and temperature reduction, then enters the fourth refrigerant port 152 of the indoor unit 15, and the low-temperature liquid refrigerant is evaporated to become low-temperature gaseous refrigerant after heat exchange with indoor air, the indoor unit 15 blows cold air, and the low-temperature gaseous refrigerant output from the third refrigerant port 151 of the indoor unit 15 enters the gas pipe 22. Moreover, the medium-temperature liquid refrigerant enters the third throttling device 30 in the liquid pipe 23, becomes low-temperature liquid refrigerant after throttling and temperature reduction, then enters the sixth refrigerant port 292 of the heat exchanger 29, and the low-temperature liquid refrigerant is evaporated to become low-temperature gaseous refrigerant after heat exchange with water in the terminal 31, the water in the terminal 31 becomes cold water, and the low-temperature gaseous refrigerant output from the fifth refrigerant port 291 of the heat exchanger 29 enters the gas pipe 22. The low-temperature gaseous refrigerant output from the gas pipe 22 returns to the inlet of the compressor 11 through the fifth switch valve 27, the seventh valve port 164 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40, and reciprocally circulates. The heat recovery heat pump system can realize ground cooling and other effects while cooling, and improve energy utilization rate.

[0130] As ​As shown, in the heating mode, the second throttling device 28, the third throttling device 30, the fourth throttling device 35, the fifth throttling device 36, the fourth on-off valve 26 and the fifth on-off valve 27 are opened, the second valve port 182 of the reversing valve 18 is communicated with the third valve port 183, the fourth valve port 161 of the four-way valve 16 is communicated with the seventh valve port 164, and the fifth valve port 162 of the four-way valve 16 is communicated with the sixth valve port 163. That is, when heating in winter, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the gas pipe 22 through the third valve port 183 and the second valve port 182 of the reversing valve 18, the fourth valve port 161 and the seventh valve port 164 of the four-way valve 16, and the fifth on-off valve 27. The medium-temperature gaseous refrigerant enters the third refrigerant port 151 of the indoor unit 15 in the gas pipe 22, and the medium-temperature gaseous refrigerant exchanges heat with indoor air in the indoor unit 15, and the medium-temperature gaseous refrigerant releases heat to the indoor air and then condenses into medium-temperature liquid refrigerant. The indoor unit 15 blows hot air, and the medium-temperature liquid refrigerant output from the fourth refrigerant port 152 of the indoor unit 15 becomes low-temperature liquid refrigerant after throttling and cooling by the second throttling device 28, and then the low-temperature liquid refrigerant output from the second throttling device 28 enters the liquid pipe 23. Moreover, the medium-temperature gaseous refrigerant enters the fifth refrigerant port 291 of the heat exchanger 29 in the gas pipe 22, and the medium-temperature gaseous refrigerant exchanges heat with water in the terminal 31 in the heat exchanger 29 and then becomes medium-temperature liquid refrigerant, the medium-temperature liquid refrigerant output from the sixth refrigerant port 292 of the heat exchanger 29 becomes low-temperature liquid refrigerant after throttling and cooling by the third throttling device 30, the water in the terminal 31 becomes hot water, and then the low-temperature liquid refrigerant output from the third throttling device 30 enters the liquid pipe 23.The low-temperature liquid refrigerant output by the liquid pipe 23 enters the first interface 331 of the liquid storage container 33 through the fourth switch valve 26, the low-temperature liquid refrigerant output by the second interface 332 of the liquid storage container 33 enters the main refrigerant path and the auxiliary refrigerant path, the low-temperature liquid refrigerant in the auxiliary refrigerant path is throttled and cooled by the fourth throttling device 35 to become low-temperature liquid refrigerant with a lower temperature, the low-temperature liquid refrigerant with a lower temperature absorbs heat from the main refrigerant path in the economizer 34 to become high-temperature gaseous refrigerant, and finally returns to the inlet of the compressor 11 through the low-pressure gas-liquid separator 40, while the low-temperature liquid refrigerant from the main refrigerant path is cooled by heat exchange to become low-temperature liquid refrigerant with a lower temperature, and then enters the fifth throttling device 36 to be throttled and cooled to become low-temperature liquid refrigerant with a still lower temperature, and then enters the second refrigerant port 142 of the outdoor heat exchanger 14, the low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14 to become low-temperature gaseous refrigerant, the low-temperature gaseous refrigerant output by the first refrigerant port 141 of the outdoor heat exchanger 14 returns to the inlet of the compressor 11 through the fifth valve port 162 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40, and reciprocally circulates. The heat recovery heat pump system can realize the effect of floor heating and the like while heating, and improve energy utilization.

[0131] It should be noted that the high, medium and low temperatures are only relative descriptions, and the gaseous refrigerant can also refer to a gas-liquid two-phase state or a gaseous state, which is not limited herein.

[0132] In different cases, ​ The heat recovery heat pump system also corresponds to different valve port connections and different operating modes, wherein the refrigeration and partial heat recovery hot water production mode, the heating and hot water production mode, the refrigeration mode and the heating mode are the same as ​ The refrigerant flow direction of the heat recovery heat pump system is the same as that shown in the figure, and only the liquid storage container 33 is omitted, which will not be described herein again. While ​ The refrigeration and full heat recovery hot water production mode and the hot water production mode of the heat recovery heat pump system are as follows:

[0133] As ​As shown, in the refrigeration and full heat recovery hot water production mode, the first throttling device 19, the second throttling device 28, the third throttling device 30, the first on-off valve 17, the second on-off valve 24, the third on-off valve 25, the fourth on-off valve 26 and the fifth on-off valve 27 are opened, the first valve port 181 of the reversing valve 18 is communicated with the second valve port 182, and the seventh valve port 164 of the four-way valve 16 is communicated with the sixth valve port 163. That is, when hot water needs to be quickly produced in the refrigeration mode, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 through the first on-off valve 17 and the second on-off valve 24, and the high-temperature gaseous refrigerant exchanges heat with the water in the hot water tank 20 in the heat recovery heat exchanger 12 to become medium-temperature liquid refrigerant after hot water is produced. The medium-temperature liquid refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third on-off valve 25, and further gas-liquid separation is performed in the high-pressure gas-liquid separator 13 to ensure that the refrigerant output from the third refrigerant outlet 133 is pure liquid. The medium-temperature liquid refrigerant output from the third refrigerant outlet 133 is throttled and cooled by the first throttling device 19 to become low-temperature liquid refrigerant with a lower temperature, and then enters the liquid pipe 23 through the ninth refrigerant port 343 and the seventh refrigerant port 341 of the economizer 34 and the fourth on-off valve 26. The medium-temperature liquid refrigerant enters the second throttling device 28 in the liquid pipe 23, is throttled and cooled by the second throttling device 28 to become low-temperature liquid refrigerant with a lower temperature, and then enters the fourth refrigerant port 152 of the indoor unit 15. The low-temperature liquid refrigerant exchanges heat with indoor air in the indoor unit 15, and the low-temperature liquid refrigerant absorbs heat from the indoor air to evaporate into low-temperature gaseous refrigerant. The indoor unit 15 blows cold air, and the low-temperature gaseous refrigerant output from the third refrigerant port 151 of the indoor unit 15 enters the gas pipe 22. Moreover, the medium-temperature liquid refrigerant enters the third throttling device 30 in the liquid pipe 23, is throttled and cooled by the third throttling device 30 to become low-temperature liquid refrigerant with a lower temperature, and then enters the sixth refrigerant port 292 of the heat exchanger 29. The low-temperature liquid refrigerant exchanges heat with the water in the terminal 31 in the heat exchanger 29, and the low-temperature liquid refrigerant absorbs heat from the water to evaporate into low-temperature gaseous refrigerant. The water in the terminal 31 becomes cold water, and the low-temperature gaseous refrigerant output from the fifth refrigerant port 291 of the heat exchanger 29 enters the gas pipe 22. The low-temperature gaseous refrigerant output from the gas pipe 22 returns to the inlet of the compressor 11 through the fifth on-off valve 27, the seventh valve port 164 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40, and reciprocally circulates.

[0134] As ​As shown, in pure hot water mode, the first throttling device 19, the fourth throttling device 35, the fifth throttling device 36, the first switching valve 17, the second switching valve 24 and the third switching valve 25 are open, the first valve port 181 of the reversing valve 18 is connected to the second valve port 182, and the fifth valve port 162 of the four-way valve 16 is connected to the sixth valve port 163. That is, when only hot water needs to be produced, the high-temperature gaseous refrigerant output from the outlet of the compressor 11 enters the first refrigerant inlet 121 of the heat recovery heat exchanger 12 after passing through the first switching valve 17 and the second switching valve 24. The high-temperature gaseous refrigerant exchanges heat with the water in the domestic water tank 20 in the heat recovery heat exchanger 12, and becomes a medium-temperature liquid refrigerant after producing hot water. The medium-temperature liquid refrigerant output from the first refrigerant outlet 122 of the heat recovery heat exchanger 12 enters the second refrigerant inlet 131 of the high-pressure gas-liquid separator 13 through the third switching valve 25, and undergoes further gas-liquid separation in the high-pressure gas-liquid separator 13 to ensure that the refrigerant output from the third refrigerant outlet 133 is pure liquid. The medium-temperature liquid refrigerant output from the third refrigerant outlet 133 is throttled and cooled by the first throttling device 19, becoming a lower-temperature liquid refrigerant. Then, it is further throttled and cooled by the fifth throttling device 36, becoming an even lower-temperature liquid refrigerant. The low-temperature liquid refrigerant output from the fifth throttling device 36 enters the second refrigerant port 142 of the outdoor heat exchanger 14. The low-temperature liquid refrigerant evaporates and absorbs heat in the outdoor heat exchanger 14, becoming a low-temperature gaseous refrigerant. The low-temperature gaseous refrigerant output from the first refrigerant port 141 of the outdoor heat exchanger 14 passes through the fifth valve port 162 and the sixth valve port 163 of the four-way valve 16 and the low-pressure gas-liquid separator 40 before returning to the inlet of the compressor 11, repeating the cycle.

[0135] By implementing this utility model, the following beneficial effects can be achieved:

[0136] In both the refrigeration and total heat recovery domestic hot water production modes and the refrigeration and partial heat recovery domestic hot water production modes, the reversing valve 18 maintains the connection between the second refrigerant outlet 132 of the high-pressure gas-liquid separator 13 and the four-way valve 16. Therefore, when switching between the two modes, it is not necessary to activate the reversing valve 18; only the four-way valve 16 needs to be activated. The gas-liquid separation of the high-pressure gas-liquid separator 13 enables automatic refrigerant flow during mode switching, thereby improving system stability.

[0137] It can be understood that the above embodiments only express part of the embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made, which belong to the protection scope of the present application, that is, the embodiments described in "in some embodiments" can be freely combined with any embodiment. Therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A heat recovery heat pump system, characterized by, Comprise: a compressor for compressing refrigerant; a heat recovery heat exchanger comprising a first refrigerant inlet and a first refrigerant outlet in communication with the first refrigerant inlet; a high-pressure gas-liquid separator comprising a second refrigerant inlet, a second refrigerant outlet in communication with the second refrigerant inlet for outputting gaseous refrigerant after gas-liquid separation, and a third refrigerant outlet in communication with the second refrigerant inlet for outputting liquid refrigerant after gas-liquid separation; an outdoor-side heat exchanger, at least one indoor unit, a four-way valve, a first on-off valve, and a reversing valve; wherein an outlet of the compressor is connected to the first refrigerant inlet via the first on-off valve, the first refrigerant outlet is connected to the second refrigerant inlet, the second refrigerant outlet is connected to the four-way valve via the reversing valve, the four-way valve is connected to the outdoor-side heat exchanger, the indoor unit, and an inlet of the compressor, the third refrigerant outlet is connected to the indoor unit, and the outdoor-side heat exchanger is connected to the indoor unit; when refrigeration and hot water production are simultaneously performed, the reversing valve keeps the second refrigerant outlet in communication with the four-way valve, and all heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a first flow path from the outlet of the compressor, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the third refrigerant outlet, the indoor unit, the four-way valve, and the inlet of the compressor; when refrigeration and hot water production are simultaneously performed, the reversing valve keeps the second refrigerant outlet in communication with the four-way valve, and part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a second flow path from the outlet of the compressor, the first on-off valve, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the second refrigerant outlet, the reversing valve, the four-way valve, the outdoor-side heat exchanger, the indoor unit, the four-way valve, and the inlet of the compressor.

2. The heat recovery heat pump system of claim 1, wherein, the third refrigerant outlet is also connected to the outdoor-side heat exchanger; when heating and hot water production are simultaneously performed, the reversing valve keeps the second refrigerant outlet in communication with the four-way valve, and part of the heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a third flow path from the outlet of the compressor, the first on-off valve, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the second refrigerant outlet, the reversing valve, the four-way valve, the indoor unit, the outdoor-side heat exchanger, the four-way valve, and the inlet of the compressor. When the hot water is produced alone, the reversing valve keeps the second refrigerant outlet in communication with the four-way valve, and the whole heat of the refrigerant is exchanged in the heat recovery heat exchanger, the refrigerant forms a fourth flow path from the outlet of the compressor, through the first switch valve, the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the third refrigerant outlet, the outdoor heat exchanger, the four-way valve and the inlet of the compressor.

3. The heat recovery heat pump system of claim 2, wherein, The reversing valve comprises a first valve port, a second valve port and a third valve port; The first valve port is connected with the second refrigerant outlet, the second valve port is connected with the four-way valve, and the third valve port is connected with the outlet of the compressor; The first valve port and the second valve port are in communication when the refrigeration and hot water production are simultaneously operated, the heating and hot water production are simultaneously operated, and the hot water production is operated alone.

4. The heat recovery heat pump system of claim 2, wherein, The outdoor heat exchanger comprises a first refrigerant port and a second refrigerant port in communication with the first refrigerant port; The indoor unit comprises a third refrigerant port and a fourth refrigerant port in communication with the third refrigerant port; The four-way valve is connected with the first refrigerant port and the third refrigerant port; the third refrigerant outlet is connected with the second refrigerant port and the fourth refrigerant port, and the second refrigerant port is connected with the fourth refrigerant port.

5. The heat recovery heat pump system of claim 4, wherein, The heat recovery heat pump system further comprises a gas pipe, a liquid pipe and at least two indoor units; In each of the indoor units, the third refrigerant port is connected with a corresponding tapping port in the gas pipe, and the fourth refrigerant port is connected with a corresponding tapping port in the liquid pipe; The total interface end of the liquid pipe is connected with the third refrigerant outlet and the second refrigerant port; The total interface end of the gas pipe is connected with the four-way valve.

6. The heat recovery heat pump system of claim 5, wherein, The heat recovery heat pump system further comprises: A second switch valve is arranged on the pipeline between the first switch valve and the first refrigerant inlet; A third switch valve is arranged on the pipeline between the first refrigerant outlet and the second refrigerant inlet; A fourth switch valve is connected with the third refrigerant outlet and the second refrigerant port at one end, and is connected with the total interface end of the liquid pipe at the other end; and A fifth switch valve is arranged on the pipeline between the total interface end of the gas pipe and the four-way valve.

7. The heat recovery heat pump system of claim 5, wherein, The heat recovery heat pump system further comprises at least one heat exchanger, and the heat exchanger comprises a fifth refrigerant port and a sixth refrigerant port in communication with the fifth refrigerant port; The fifth refrigerant port is connected with a corresponding tapping port in the gas pipe, and the sixth refrigerant port is connected with a corresponding tapping port in the liquid pipe.

8. The heat recovery heat pump system according to claim 2, wherein The heat recovery heat pump system further comprises an economic module; wherein the first end of the economic module is connected with the indoor unit, and the second end of the economic module is connected with the outdoor heat exchanger and the third refrigerant outlet; Alternatively, the heat recovery heat pump system further comprises an economizer module and a liquid storage container; wherein the first interface of the liquid storage container is connected with the indoor unit, and the third refrigerant outlet is connected to the pipeline between the first interface of the liquid storage container and the indoor unit; the second interface of the liquid storage container is connected with the first end of the economizer module, and the second end of the economizer module is connected with the outdoor heat exchanger.

9. The heat recovery heat pump system of claim 2, wherein, The heat recovery heat pump system further comprises a first throttling device; The third refrigerant outlet is connected with the outdoor heat exchanger and the indoor unit through the first throttling device.

10. The heat recovery heat pump system of claim 4, wherein, The heat recovery heat pump system further comprises a second throttling device arranged corresponding to each indoor unit; The second throttling device is arranged on the pipeline at the fourth refrigerant port.

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