Heat pump triple co-generation system

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a heat pump triple co-generation system. The heat pump triple co-generation system comprises an air bellow, a water tank and a heat pump unit. The heat pump unit comprises a first heat exchanger, a second heat exchanger, a water tank heat exchanger and a compressor, the first heat exchanger and the second heat exchanger are both located in the air box, and the water tank heat exchanger is used for exchanging heat with the water tank; one of the high-pressure side and the low-pressure side of the compressor is communicated with the first heat exchanger, the other one of the high-pressure side and the low-pressure side of the compressor is selectively communicated with one of the second heat exchanger and the water tank heat exchanger, and the second heat exchanger and the water tank heat exchanger are arranged in parallel. A first expansion valve is arranged between the first heat exchanger and the second heat exchanger, and a second expansion valve is arranged between the first heat exchanger and the water tank heat exchanger. Full-time refrigeration can be achieved, and user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a heat pump trigeneration system. Background Art

[0002] An air source heat pump water heater is an electrical appliance that absorbs heat energy from the air to heat water through the operation of a heat pump.

[0003] The existing air source heat pump trigeneration system can cool or heat the room. However, when the user only wants to use the cooling function, if the temperature in the water tank does not reach the set temperature, the air source heat pump trigeneration system will heat the water tank while cooling. When the water tank reaches the set temperature, it can no longer cool, which affects the user experience. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a heat pump trigeneration system, which can effectively solve the technical problem that the heat pump trigeneration system in the prior art cannot provide full-time refrigeration.

[0005] The above technical problems are solved by the following technical solutions:

[0006] Heat pump trigeneration system, including:

[0007] Bellows;

[0008] Water tank;

[0009] A heat pump unit comprises a first heat exchanger, a second heat exchanger, a water tank heat exchanger and a compressor, wherein the first heat exchanger and the second heat exchanger are both located in the wind box, and the water tank heat exchanger is used for exchanging heat with the water tank; one of the high-pressure side and the low-pressure side of the compressor is connected to the first heat exchanger, and the other is selectively connected to the second heat exchanger and one of the water tank heat exchanger, the second heat exchanger and the water tank heat exchanger are arranged in parallel, a first expansion valve is arranged between the first heat exchanger and the second heat exchanger, and a second expansion valve is arranged between the first heat exchanger and the water tank heat exchanger.

[0010] Compared with the background technology, the heat pump trigeneration system described in the utility model has the following beneficial effects:

[0011] When only cooling is needed, the high-pressure side of the compressor is controlled to be connected to the second heat exchanger, and the low-pressure side of the compressor is connected to the first heat exchanger. At this time, the water tank heat exchanger does not participate in the heat exchange, and the first heat exchanger and the second heat exchanger are connected to form a heat exchange loop. The refrigerant circulates in the heat exchange loop, and the refrigerant releases heat when passing through the second heat exchanger, and absorbs heat when passing through the first heat exchanger to form cold air. The formed cold air is introduced into the room to cool the room. That is, when only cooling is needed, the refrigerant of the heat pump trigeneration system does not need to pass through the water tank heat exchanger, thereby improving the cooling efficiency, realizing full-time cooling, and enhancing the user experience.

[0012] Or when only cooling is needed, the high-pressure side of the compressor is controlled to be connected to the first heat exchanger, and the low-pressure side of the compressor is connected to the second heat exchanger. At this time, the water tank heat exchanger does not participate in the heat exchange, and the first heat exchanger and the second heat exchanger are connected to form a heat exchange loop. The refrigerant circulates in the heat exchange loop, and the refrigerant releases heat when passing through the first heat exchanger, and absorbs heat when passing through the second heat exchanger to form cold air. The formed cold air is introduced into the room to cool the room. That is, when only cooling is needed, the refrigerant of the heat pump trigeneration system does not need to pass through the water tank heat exchanger, thereby improving the cooling efficiency, realizing full-time cooling, and enhancing the user experience.

[0013] In one embodiment, the heat pump trigeneration system further includes an air duct device, and the air duct device includes:

[0014] An air inlet duct assembly, the air inlet duct assembly is connected to the wind box, and the air inlet duct assembly can be selectively opened or closed;

[0015] A first air duct assembly is arranged corresponding to the first heat exchanger, comprising a first port, a second port and a third port, wherein the first port is connected to the wind box, and the second port and the third port can be opened selectively;

[0016] The second air duct assembly is arranged corresponding to the second heat exchanger, and includes a fourth port, a fifth port and a sixth port. The fourth port is connected to the wind box, and the fifth port and the sixth port can be opened selectively.

[0017] In one embodiment, the air inlet duct assembly includes:

[0018] An air inlet pipe, one end of which is connected to the wind box;

[0019] The first valve is arranged in the air inlet pipe and is used to control the opening or closing of the air inlet pipe.

[0020] In one embodiment, the first air duct assembly includes:

[0021] a first connecting pipe, wherein one end of the first connecting pipe is the first port, and the other end of the first connecting pipe is the second port;

[0022] a second connecting pipe, one end of which is connected to the side of the first connecting pipe and the other end of which is the third port;

[0023] The second valve is arranged at the connection between the second communicating pipe and the first communicating pipe, and is used for controlling the second port and the third port to selectively open.

[0024] In one embodiment, the second air duct assembly includes:

[0025] a third connecting pipe, one end of the third connecting pipe being the fourth port, and the other end of the third connecting pipe being the fifth port;

[0026] a fourth connecting pipe, one end of which is connected to the side of the third connecting pipe and the other end of which is the sixth port;

[0027] The third valve is arranged at the connection between the fourth connecting pipe and the third connecting pipe, and is used to control the fifth port and the sixth port to selectively open.

[0028] In one of the embodiments, a first fan is disposed in the wind box between the first heat exchanger and the inlet end of the first air duct assembly;

[0029] A second fan is disposed in the wind box between the second heat exchanger and the inlet end of the second air duct assembly.

[0030] In one of the embodiments, the heat pump trigeneration system further includes a reversing valve assembly, through which the high-pressure side of the compressor can be selectively connected to one of the first heat exchanger, the second heat exchanger and the water tank heat exchanger, and the low-pressure side of the compressor can be selectively connected to one of the other two heat exchangers that are not connected to the high-pressure side through the reversing valve assembly.

[0031] In one embodiment, the reversing valve assembly includes a first four-way reversing valve and a second four-way reversing valve connected to each other.

[0032] In one of the embodiments, the heat pump trigeneration system further includes an auxiliary heating device, and the auxiliary heating device can selectively heat the water tank.

[0033] In one embodiment, the auxiliary heating device is one of a gas water heater, an electric water heater and a solar water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A schematic diagram of the structure of a heat pump trigeneration system provided by an embodiment of the utility model;

[0035] Figure 2 A schematic diagram of a reversing valve assembly provided in an embodiment of the utility model;

[0036] Figure 3 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a first cooling mode;

[0037] Figure 4 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a second cooling mode;

[0038] Figure 5 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a third cooling mode;

[0039] Figure 6 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a fourth cooling mode;

[0040] Figure 7 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a first heating mode;

[0041] Figure 8 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a second heating mode;

[0042] Fig. 9 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a third heating mode;

[0043] Fig.10 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a fourth heating mode;

[0044] Fig.11 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a first dehumidification mode;

[0045] Fig.12 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a second dehumidification mode;

[0046] Fig.13 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a first fresh air mode;

[0047] Fig.14 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a second fresh air mode;

[0048] Fig.15A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a third fresh air mode;

[0049] Fig.16 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a first domestic hot water mode;

[0050] Fig.17 A schematic diagram of a heat pump trigeneration system provided by an embodiment of the utility model when executing a second domestic hot water mode;

[0051] Fig.18 A schematic diagram of the heat pump trigeneration system provided in an embodiment of the utility model when executing the third domestic hot water mode.

[0052] Description of labels:

[0053] 1. Bellows; 11. First fan; 12. Second fan;

[0054] 2. Heat pump unit; 21. Compressor; 22. First heat exchanger; 23. Second heat exchanger; 24. First four-way reversing valve; 25. Second four-way reversing valve; 26. Water tank heat exchanger; 27. First expansion valve; 28. Second expansion valve;

[0055] 31. air inlet duct assembly; 311. air inlet duct; 312. first valve; 32. first duct assembly; 321. first connecting pipe; 322. second connecting pipe; 323. second valve; 33. second duct assembly; 331. third connecting pipe; 332. fourth connecting pipe; 333. third valve;

[0056] 4. Water tank;

[0057] 5. Auxiliary heating device. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] See also Figure 1 , this embodiment provides a heat pump trigeneration system, which has a fast cooling speed and can improve the user experience.

[0063] Specifically, in this embodiment, the heat pump trigeneration system includes a wind box 1 , a heat pump unit 2 and a water tank 4 .

[0064] The heat pump unit 2 includes a first heat exchanger 22, a second heat exchanger 23, a water tank heat exchanger 26 and a compressor 21. The first heat exchanger 22 and the second heat exchanger 23 are both located in the wind box 1. The water tank heat exchanger 26 is used to exchange heat with the water tank 4. One of the high-pressure side and the low-pressure side of the compressor 21 is connected to the first heat exchanger 22, and the other is selectively connected to the second heat exchanger 23 and one of the water tank heat exchanger 26. The second heat exchanger 23 and the water tank heat exchanger 26 are arranged in parallel. A first expansion valve 27 is arranged between the first heat exchanger 22 and the second heat exchanger 23, and a second expansion valve 28 is arranged between the first heat exchanger 22 and the water tank heat exchanger 26.

[0065] It should be noted that the second heat exchanger 23 and the water tank heat exchanger 26 are arranged in parallel in this embodiment, which means that the second heat exchanger 23 and the water tank heat exchanger 26 are on two independent branch flow paths. For the convenience of description, the branch flow path where the second heat exchanger 23 is located is called the first branch flow path, and the first expansion valve 27 is arranged on the first branch flow path; the branch flow path where the water tank heat exchanger 26 is located is called the second branch flow path, and the second expansion valve 28 is arranged on the second branch flow path. One of the high-pressure side and the low-pressure side of the compressor 21 is connected to the first heat exchanger 22, and the other is selectively connected to the first branch flow path or the second branch flow path.

[0066] Preferably, in this embodiment, the compressor 21 is located inside the wind box 1 .

[0067] For example, in this embodiment, the connection mode of the heat pump unit 2 includes the following situations:

[0068] The high-pressure side of the compressor 21 is communicated with the first heat exchanger 22, and the low-pressure side is communicated with the second heat exchanger 23. The first heat exchanger 22 and the second heat exchanger 23 are communicated with each other through a first expansion valve 27;

[0069] The high-pressure side of the compressor 21 is in communication with the first heat exchanger 22, and the low-pressure side is in communication with the water tank heat exchanger 26. The first heat exchanger 22 and the water tank heat exchanger 26 are in communication with each other through a second expansion valve 28;

[0070] The low-pressure side of the compressor 21 is communicated with the first heat exchanger 22, and the high-pressure side is communicated with the second heat exchanger 23. The first heat exchanger 22 and the second heat exchanger 23 are communicated with each other through a first expansion valve 27;

[0071] The low-pressure side of the compressor 21 is communicated with the first heat exchanger 22 , and the high-pressure side is communicated with the water tank heat exchanger 26 . The first heat exchanger 22 and the water tank heat exchanger 26 are communicated with each other via a second expansion valve 28 .

[0072] Preferably, a partition plate is provided between the first heat exchanger 22 and the second heat exchanger 23 in the wind box 1 to avoid interference between the two.

[0073] When the water tank 4 needs to be heat exchanged and cooled, the high-pressure side of the compressor 21 is controlled to be connected to the water tank heat exchanger 26, and the low-pressure side of the compressor 21 is connected to the first heat exchanger 22. At this time, the water tank heat exchanger 26 is connected to the first heat exchanger 22 to form a heat exchange loop. The refrigerant circulates in the heat exchange loop. When the refrigerant passes through the water tank heat exchanger 26, it releases heat to heat the water tank 4. When the refrigerant passes through the first heat exchanger 22, it absorbs heat to form cold air. The formed cold air is introduced into the room to cool the room.

[0074] When only cooling is needed, the high-pressure side of the compressor 21 is controlled to be connected to the second heat exchanger 23, and the low-pressure side of the compressor 21 is connected to the first heat exchanger 22. At this time, the water tank heat exchanger 26 does not participate in the heat exchange, and the first heat exchanger 22 and the second heat exchanger 23 are connected to form a heat exchange loop. The refrigerant circulates in the heat exchange loop, and the refrigerant releases heat when passing through the second heat exchanger 23, and absorbs heat when passing through the first heat exchanger 22 to form cold air. The formed cold air is introduced into the room to cool the room. That is, when only cooling is needed, the refrigerant of the heat pump trigeneration system does not need to pass through the water tank heat exchanger 26, thereby improving the cooling efficiency, realizing full-time cooling, and enhancing the user experience.

[0075] Alternatively, when only cooling is needed, the high-pressure side of the compressor 21 is controlled to be connected to the first heat exchanger 22, and the low-pressure side of the compressor is connected to the second heat exchanger 23. At this time, the water tank heat exchanger 26 does not participate in the heat exchange, and the first heat exchanger 22 and the second heat exchanger 23 are connected to form a heat exchange loop. The refrigerant circulates in the heat exchange loop, and the refrigerant releases heat when passing through the first heat exchanger 22, and absorbs heat when passing through the second heat exchanger 23 to form cold air. The formed cold air is introduced into the room to cool the room. That is, when only cooling is needed, the refrigerant of the heat pump trigeneration system does not need to pass through the water tank heat exchanger 26, thereby improving the cooling efficiency, realizing full-time cooling, and enhancing the user experience.

[0076] In one embodiment, the heat pump trigeneration system also includes a reversing valve assembly, and the high-pressure side of the compressor 21 can be selectively connected to one of the first heat exchanger 22, the second heat exchanger 23 and the water tank heat exchanger 26 through the reversing valve assembly, and the low-pressure side of the compressor 21 can be selectively connected to one of the other two heat exchangers that are not connected to the high-pressure side through the reversing valve assembly.

[0077] In one embodiment, the reversing valve assembly includes a first four-way reversing valve 24 and a second four-way reversing valve 25 connected to each other.

[0078] Specifically, see Figure 2 The first four-way reversing valve 24 includes four interfaces, which are a, b, c and d in a clockwise direction. The second four-way reversing valve 25 includes four interfaces, which are e, f, g and h in a clockwise direction.

[0079] Specifically, when the high-pressure side of the compressor 21 needs to be connected to the first heat exchanger 22, the high-pressure side is connected to the first heat exchanger 22 via the c port and the d port of the first four-way reversing valve 24 in sequence; when the low-pressure side of the compressor 21 needs to be connected to the first heat exchanger 22, the low-pressure side is connected to the first heat exchanger 22 via the a port and the d port of the first four-way reversing valve 24 in sequence.

[0080] When the high-pressure side of the compressor 21 needs to be connected to the second heat exchanger 23, the high-pressure side of the compressor 21 is connected to the second heat exchanger 23 via the c port, the b port of the first four-way reversing valve 24, the g port and the h port of the second four-way reversing valve 25 in sequence; when the low-pressure side of the compressor 21 needs to be connected to the second heat exchanger 23, the low-pressure side is connected to the second heat exchanger 23 via the a port and the b port of the first four-way reversing valve 24, the g port and the h port of the second four-way reversing valve 25 in sequence.

[0081] When the high-pressure side of the compressor 21 needs to be connected to the water tank heat exchanger 26, the high-pressure side of the compressor 21 is connected to the water tank heat exchanger 26 via the c port, the b port of the first four-way reversing valve 24, the g port and the f port of the second four-way reversing valve 25 in sequence; when the low-pressure side of the compressor 21 needs to be connected to the water tank heat exchanger 26, the low-pressure side of the compressor 21 is connected to the water tank heat exchanger 26 via the a port and the b port of the first four-way reversing valve 24, the g port and the f port of the second four-way reversing valve 25 in sequence.

[0082] In one embodiment, the heat pump trigeneration system further includes an air duct device, which includes an air inlet duct assembly 31 , a first air duct assembly 32 and a second air duct assembly 33 .

[0083] The air inlet duct assembly 31 is connected to the wind box 1 and can be selectively opened or closed. The air inlet duct assembly 31 is used to introduce the natural wind from the outside into the wind box 1.

[0084] The first air duct assembly 32 is arranged corresponding to the first heat exchanger 22, and includes a first port, a second port and a third port. The first port is connected to the wind box 1, and the second port and the third port can be opened selectively.

[0085] The second air duct assembly 33 is arranged corresponding to the second heat exchanger 23, and includes a fourth port, a fifth port and a sixth port. The fourth port is connected to the wind box 1, and the fifth port and the sixth port can be opened selectively.

[0086] Specifically, in actual use, the third port of the first air duct assembly 32 is connected to the indoor environment, and the second port is connected to the outside atmosphere. The cold air generated by the first heat exchanger 22 is delivered to the indoor environment via the outlet of the first air duct assembly 32 connected to the indoor environment.

[0087] The fifth port of the second air duct assembly 33 is connected to the room, and the sixth port is connected to the outside atmosphere. With such arrangement, the above-mentioned air duct device can circulate cold air to the room when the heat pump trigeneration system is cooling.

[0088] The air duct device cooperates with the heat pump unit 2 to enable the heat pump trigeneration system to have multiple working modes.

[0089] Specifically, when circulating cold air to the room, the air inlet duct 311 is controlled to be closed. The third port of the first air duct assembly 32 connected to the room is controlled to be opened, and the second port connected to the outside is controlled to be closed; the fifth port of the second air duct assembly 33 connected to the room is controlled to be opened, and the sixth port connected to the outside is controlled to be closed.

[0090] By adopting the above-mentioned air duct device, the heat pump trigeneration system has a dehumidification function.

[0091] When the indoor air needs to be dehumidified, the air inlet 311 is closed. The third port of the first air duct assembly 32 connected to the indoor air is controlled to be opened, and the second port connected to the outdoor air is controlled to be closed; the fifth port of the second air duct assembly 33 connected to the indoor air is controlled to be opened, and the sixth port connected to the outdoor air is controlled to be closed, and one of the first heat exchanger 22 and the second heat exchanger 23 is controlled to be connected to the low-pressure side of the compressor 21, and the other of the first heat exchanger 22 and the second heat exchanger is controlled to be connected to the high-pressure side of the compressor 21, and the fan corresponding to the heat exchanger for heat release is controlled to work, and the other fan is not operated, so that the indoor air can be dehumidified.

[0092] In one embodiment, the air inlet duct assembly 31 includes an air inlet duct 311 and a first valve 312 .

[0093] One end of the air inlet pipe 311 is connected to the wind box 1 .

[0094] The first valve 312 is disposed in the air inlet pipe 311 and is used to control the air inlet pipe 311 to be opened or closed.

[0095] When the air inlet pipe 311 is required to introduce outside air into the wind box 1, the first valve 312 controls the air inlet pipe 311 to be opened. When the air inlet pipe 311 is not required to introduce outside air into the wind box 1, the first valve 312 controls the air inlet pipe 311 to be closed.

[0096] In one embodiment, the first air duct assembly 32 includes a first connecting pipe 321 , a second connecting pipe 322 and a second valve 323 .

[0097] One end of the first connecting pipe 321 is a first port, and the other end of the first connecting pipe 321 is a second port.

[0098] One end of the second communicating tube 322 is communicated with the side of the first communicating tube 321 , and the other end is a third port.

[0099] The second valve 323 is disposed at the connection between the second connecting pipe 322 and the first connecting pipe 321 , and is used to control whether the second port or the third port is selectively opened.

[0100] Specifically, in actual use, the second port of the first connecting pipe 321 is connected to the outside atmosphere, and the third port of the second connecting pipe 322 extends into the room.

[0101] It can be understood that in the actual working process, the first port can be used as an air outlet or as an air inlet; the second port can be used as an air outlet or as an air inlet; the third port can be used as an air outlet or as an air inlet; to meet the working requirements of different modes of the heat pump trigeneration system.

[0102] In one embodiment, the second air duct assembly 33 includes a third connecting pipe 331 , a fourth connecting pipe 332 and a third valve 333 .

[0103] One end of the third connecting pipe 331 is a fourth port, and the other end of the third connecting pipe 331 is a fifth port.

[0104] One end of the fourth communicating pipe 332 is communicated with the side of the third communicating pipe 331 , and the other end is a sixth port.

[0105] The third valve 333 is disposed at the connection between the fourth connecting pipe 332 and the third connecting pipe 331 , and is used to control whether the fifth port or the sixth port is selectively opened.

[0106] Specifically, in actual use, the fifth port of the third connecting pipe 331 extends into the room, and the sixth port of the fourth connecting pipe 332 is connected to the outside atmosphere.

[0107] It can be understood that, in the actual working process, the fourth port can be used as the air outlet or as the air inlet; the fifth port can be used as the air outlet or as the air inlet; the sixth port can be used as the air outlet or as the air inlet; so as to meet the working requirements of different modes of the heat pump trigeneration system.

[0108] In one embodiment, the third port of the first air duct assembly 32 is the first indoor connecting port, the fifth port of the second air duct assembly 33 is the second indoor connecting port, and the third port and the fifth port are arranged at intervals up and down. With such an arrangement, the user can select ports at different upper and lower positions to discharge air toward the indoor, which is also convenient for realizing the circulating air supply mode of the heat pump trigeneration system.

[0109] In one embodiment, in order to increase the air flow speed in the wind box 1, a first fan 11 is provided in the wind box 1 between the first heat exchanger 22 and the inlet end of the first air duct assembly 32; and / or

[0110] In the wind box 1 , a second fan 12 is provided between the second heat exchanger 23 and the inlet end of the second air duct assembly 33 .

[0111] Preferably, the first fan 11 and the second fan 12 are provided at the same time so that they serve as backup for each other to ensure the stability of the product.

[0112] In one of the embodiments, the heat pump trigeneration system further includes an auxiliary heating device 5 , which can selectively heat the water tank 4 .

[0113] Optionally, the auxiliary heating device 5 includes but is not limited to: gas heating, electric heating, solar heating, etc. Specifically, in this embodiment, the auxiliary heating device 5 is one of a gas water heater, an electric water heater, and a solar water heater.

[0114] The auxiliary heating device 5 is provided so that the heat pump trigeneration system has a working mode of circulating hot air.

[0115] In one embodiment, a first expansion valve 27 is disposed on the connecting pipeline between the first heat exchanger 22 and the second heat exchanger 23 .

[0116] A second expansion valve 28 is provided on the communication pipeline between the first heat exchanger 22 and the water tank heat exchanger 26 .

[0117] Specifically, in this embodiment, the main working modes of the heat pump trigeneration system include: cooling mode, heating mode, dehumidification mode, fresh air mode and domestic hot water mode.

[0118] The refrigeration modes include a first refrigeration mode, a second refrigeration mode, a third refrigeration mode and a fourth refrigeration mode.

[0119] See also Figure 3 , the first cooling mode is a one-way cold air supply mode; in the first cooling mode, the first valve 312 controls the air inlet pipe 311 to open; the second valve 323 controls the second port of the first connecting pipe 321 to close, and controls the third port of the second connecting pipe 322 to open; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the high-pressure side of the compressor 21 is connected to the second heat exchanger 23 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, the low-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, and the second heat exchanger 23 is connected to the first heat exchanger 22; during the working process, the first fan 11 and the second fan 12 are both working, the second heat exchanger 23 releases heat and the heat generated is discharged from the outlet end of the fourth connecting pipe 332 by the second fan 12, the first heat exchanger 22 absorbs heat and generates cold air, and the cold air is discharged to the room from the outlet end of the second connecting pipe 322 by the first fan 11.

[0120] Specifically, in the first refrigeration mode, the compressor 21 compresses the low-temperature and low-pressure gaseous working medium to form a high-temperature and high-pressure gaseous working medium, and the high-temperature and high-pressure gaseous working medium is transported to the second heat exchanger 23 via the high-pressure side, and the natural wind entering the wind box 1 cools down the second heat exchanger 23, so that the second heat exchanger 23 outputs a medium-temperature and medium-pressure gas-liquid mixed working medium, and the medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the first expansion valve 27, and the low-temperature and low-pressure liquid working medium is transported to the first heat exchanger 22, and the first heat exchanger 22 absorbs the heat of the outside air to convert the outside air into cold wind; after the first heat exchanger 22 absorbs the heat of the outside air, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium, and the low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0121] Specifically, the working fluid involved in heat exchange is Freon.

[0122] See also Figure 4 , the second cooling mode is a one-way downward cold air delivery mode; in the second cooling mode, the first valve 312 controls the air inlet pipe 311 to open; the second valve 323 controls the second port of the first connecting pipe 321 to open, and controls the third port of the second connecting pipe 322 to close; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to close, and controls the fifth port of the third connecting pipe 331 to open; the high-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, and the low-pressure side of the compressor is connected to the second heat exchanger 23 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, and the second heat exchanger 23 is connected to the first heat exchanger 22; during the working process, both the first fan 11 and the second fan 12 are working, the second heat exchanger 23 absorbs heat and generates cold air, and the cold air is sent to the room from the outlet end of the third connecting pipe 331 by the second fan 12; the first heat exchanger 22 releases heat and the generated heat is discharged from the outlet end of the first connecting pipe 321 by the first fan 11.

[0123] Specifically, in the second refrigeration mode, the compressor 21 compresses the low-temperature and low-pressure gaseous working medium to form a high-temperature and high-pressure gaseous working medium, and the high-temperature and high-pressure gaseous working medium is transported to the first heat exchanger 22 via the high-pressure side, and the natural wind entering the wind box 1 cools down the first heat exchanger 22, so that the first heat exchanger 22 outputs a medium-temperature and medium-pressure gas-liquid mixed working medium, and the medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the first expansion valve 27, and the low-temperature and low-pressure liquid working medium is transported to the second heat exchanger 23, and the second heat exchanger 23 absorbs the heat of the outside air to convert the outside air into cold wind; after the second heat exchanger 23 absorbs the heat of the outside air, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium, and the low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0124] See also Figure 5, the third refrigeration mode is a circulating upward cold air delivery mode; in the third refrigeration mode, the first valve 312 controls the air inlet pipe 311 to be closed; the second valve 323 controls the second port of the first connecting pipe 321 to be closed, and controls the third port of the second connecting pipe 322 to be opened; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to be closed, and controls the fifth port of the third connecting pipe 331 to be opened; the high-pressure side of the compressor 21 is connected to the water tank heat exchanger 26 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, and ... The low-pressure side of the machine 21 is connected to the first heat exchanger via the first four-way reversing valve 24, and the second heat exchanger 23 is connected to the first heat exchanger 22; during the operation, the first fan 11 is working and the second fan 12 is not working, and the indoor air enters the bellows 1 through the third connecting pipe 331, and the first heat exchanger 22 absorbs heat in the bellows 1 and generates cold air, and the cold air is discharged to the room from the outlet end of the second connecting pipe 322 by the first fan 11, so as to realize circulating cooling; the water tank heat exchanger 26 releases heat and the heat generated can heat the water in the water tank 4.

[0125] Specifically, in the third refrigeration mode, the compressor 21 compresses the low-temperature and low-pressure gaseous working medium to form a high-temperature and high-pressure gaseous working medium, and the high-temperature and high-pressure gaseous working medium is transported to the water tank heat exchanger 26 via the high-pressure side. The water tank heat exchanger 26 heats the water in the water tank 4, thereby cooling the water tank heat exchanger 26, so that the water tank heat exchanger 26 outputs a medium-temperature and medium-pressure gas-liquid mixed working medium, and the medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the second expansion valve 28. The low-temperature and low-pressure liquid working medium is transported to the first heat exchanger 22, and the first heat exchanger 22 absorbs the heat of the outside air, thereby converting the outside air into cold wind; after the first heat exchanger 22 absorbs the heat of the outside air, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium, and the low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0126] Circulating cold air can quickly cool down the room, and can also prevent the indoor cold air from overflowing through the gaps in doors and windows due to the imbalance of indoor and outdoor air pressure under the action of indoor positive pressure.

[0127] See also Figure 6, the fourth cooling mode is a one-way cold air supply + heat pump hot water mode; in the fourth cooling mode, the first valve 312 controls the air inlet pipe 311 to open; the second valve 323 controls the second port of the first connecting pipe 321 to close, and controls the third port of the second connecting pipe 322 to open; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the high-pressure side of the compressor 21 is connected to the water tank heat exchanger 26 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence. The low-pressure side of the compressor 21 is connected to the first heat exchanger via the first four-way reversing valve 24, and the second heat exchanger 23 is connected to the first heat exchanger 22; during the operation, the first fan 11 is working, and the second fan 12 is not working, and the outside air enters the wind box 1 via the fourth connecting pipe 332 and the air inlet pipe 311, and the first heat exchanger 22 absorbs heat in the wind box 1 and generates cold air, and the cold air is discharged to the room from the outlet end of the second connecting pipe 322 by the first fan 11; the water tank heat exchanger 26 releases heat and the heat generated can heat the water in the water tank 4.

[0128] Specifically, in the fourth refrigeration mode, the compressor 21 compresses the low-temperature and low-pressure gaseous working medium to form a high-temperature and high-pressure gaseous working medium, and the high-temperature and high-pressure gaseous working medium is transported to the water tank heat exchanger 26 via the high-pressure side. The water tank heat exchanger 26 heats the water in the water tank 4, thereby cooling the water tank heat exchanger 26, so that the water tank heat exchanger 26 outputs a medium-temperature and medium-pressure gas-liquid mixed working medium, and the medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the second expansion valve 28. The low-temperature and low-pressure liquid working medium is transported to the first heat exchanger 22, and the first heat exchanger 22 absorbs the heat of the outside air, thereby converting the outside air into cold wind; after the first heat exchanger 22 absorbs the heat of the outside air, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium, and the low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0129] The heating modes include a first heating mode, a second heating mode, a third heating mode, and a fourth heating mode.

[0130] See also Figure 7, the first heating mode is a one-way downward hot air delivery mode; in the first heating mode, the first valve 312 controls the air inlet pipe 311 to open; the second valve 323 controls the second port of the first connecting pipe 321 to open, and controls the third port of the second connecting pipe 322 to close; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to close, and controls the fifth port of the third connecting pipe 331 to open; the high-pressure side of the compressor 21 is connected to the second connecting pipe 331 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence. The first four-way reversing valve 24 is connected to the first heat exchanger 23, the low-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, and the second heat exchanger 23 is connected to the first heat exchanger 22; during the operation, the first fan 11 and the second fan 12 are both working, and the outside air enters the wind box 1 through the air inlet pipe 311, the first heat exchanger 22 absorbs heat to generate cold air, and the cold air is discharged to the atmosphere through the first connecting pipe 321, and the second heat exchanger 23 releases heat and the generated heat is discharged to the room through the third connecting pipe 331 by the second fan 12.

[0131] Specifically, in the first heating mode, the compressor 21 inhales low-temperature and low-pressure gaseous working medium and compresses it to form high-temperature and high-pressure gaseous working medium, which is transported to the second heat exchanger 23 via the high-pressure side. The second heat exchanger 23 exchanges heat with the natural wind entering the wind box 1 to form hot air. After the temperature of the second heat exchanger 23 is reduced, a medium-temperature and medium-pressure gas-liquid mixed working medium is output. The medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the first expansion valve 27. The low-temperature and low-pressure liquid working medium is transported to the first heat exchanger 22. After the first heat exchanger 22 absorbs heat from the outside air, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium. The low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0132] See also Figure 8 , the second heating mode is a one-way hot air supply mode; in the second heating mode, the first valve 312 controls the air inlet pipe 311 to open; the second valve 323 controls the second port of the first connecting pipe 321 to close, and controls the third port of the second connecting pipe 322 to open; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the high-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, and the compressor 21 The low-pressure side is connected to the second heat exchanger 23 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, and the second heat exchanger 23 is connected to the first heat exchanger 22; during operation, the first fan 11 and the second fan 12 are both working, and the outside air enters the wind box 1 from the air inlet pipe 311. The first heat exchanger 22 releases heat and the generated heat is discharged to the room through the second connecting pipe 322 by the first fan 11. The second heat exchanger 23 absorbs heat to generate cold air, and the cold air is discharged into the atmosphere through the fourth connecting pipe 332.

[0133] Specifically, in the second heating mode, the compressor 21 inhales low-temperature and low-pressure gaseous working medium and compresses it to form high-temperature and high-pressure gaseous working medium, which is transported to the first heat exchanger 22 via the high-pressure side. The first heat exchanger 22 exchanges heat with the natural wind entering the wind box 1 to form hot air. After the temperature of the first heat exchanger 22 is reduced, a medium-temperature and medium-pressure gas-liquid mixed working medium is output. The medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the first expansion valve 27. The low-temperature and low-pressure liquid working medium is transported to the first heat exchanger 22. After the first heat exchanger 22 absorbs heat from the outside air, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium. The low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0134] See also Fig. 9 , the third heating mode is a one-way hot air supply + auxiliary heating mode; in the third heating mode, the first valve 312 controls the air inlet pipe 311 to open; the second valve 323 controls the second port of the first connecting pipe 321 to close, and controls the third port of the second connecting pipe 322 to open; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the high-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, The low-pressure side of the compressor 21 is connected to the water tank heat exchanger 26 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, and the water tank heat exchanger 26 is connected to the first heat exchanger 22; during operation, the first fan 11 is working, and the second fan 12 is not working, the first heat exchanger 22 releases heat to generate hot air, and the hot air is discharged into the room through the second connecting pipe 322 by the first fan 11; the water tank heat exchanger 26 absorbs heat, and the auxiliary heating device 5 heats the water tank 4 to meet the heat absorption demand of the water tank heat exchanger 26.

[0135] Specifically, in the third heating mode, the compressor 21 inhales low-temperature and low-pressure gaseous working medium and compresses it to form high-temperature and high-pressure gaseous working medium, which is transported to the first heat exchanger 22 via the high-pressure side. The first heat exchanger 22 exchanges heat with the natural wind entering the wind box 1 to form hot air. After the temperature of the first heat exchanger 22 is reduced, a medium-temperature and medium-pressure gas-liquid mixed working medium is output. The medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the second expansion valve 28. The low-temperature and low-pressure liquid working medium is transported to the water tank heat exchanger 26. After the water tank heat exchanger 26 absorbs the heat of the water in the water tank 4, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium. The low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0136] See also Fig.10, the fourth heating mode is a circulating upward hot air delivery + auxiliary heating mode; in the fourth heating mode, the first valve 312 controls the air inlet pipe 311 to be closed, the second valve 323 controls the second port of the first connecting pipe 321 to be closed, and controls the third port of the second connecting pipe 322 to be opened; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to be closed, and controls the fifth port of the outlet end of the third connecting pipe 331 to be opened; the high-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, and the low-pressure side of the compressor 21 is connected to the water tank heat exchanger 26 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, and the water tank heat exchanger 26 is connected to the first heat exchanger 22; during the working process, the first fan 11 is working, and the second fan 12 is not working, the indoor air enters the wind box 1 through the third connecting pipe 331, the first heat exchanger 22 releases heat to generate hot air, and the hot air is discharged to the room from the second connecting pipe 322 by the first fan 11.

[0137] Specifically, in the fourth heating mode, the compressor 21 inhales low-temperature and low-pressure gaseous working medium and compresses it to form high-temperature and high-pressure gaseous working medium, which is transported to the first heat exchanger 22 via the high-pressure side. The first heat exchanger 22 exchanges heat with the natural wind entering the wind box 1 to form hot air. After the temperature of the first heat exchanger 22 is reduced, a medium-temperature and medium-pressure gas-liquid mixed working medium is output. The medium-temperature and medium-pressure gas-liquid mixed working medium is converted into a low-temperature and low-pressure liquid working medium via the second expansion valve 28. The low-temperature and low-pressure liquid working medium is transported to the water tank heat exchanger 26. After the water tank heat exchanger 26 absorbs the heat of the water in the water tank 4, the low-temperature and low-pressure liquid working medium is converted into a low-temperature and low-pressure gaseous working medium. The low-temperature and low-pressure gaseous working medium enters the compressor 21 from the low-pressure side and circulates to participate in heat exchange.

[0138] Circulating hot air can quickly heat up the room, and can also prevent the indoor warm air from overflowing through the gaps in doors and windows due to the imbalance of indoor and outdoor air pressure under the action of indoor positive pressure.

[0139] The dehumidification mode includes a first dehumidification mode and a second dehumidification mode.

[0140] See also Fig.11, the first dehumidification mode is a downward air supply dehumidification mode; in the first dehumidification mode, the first valve 312 controls the air inlet pipe 311 to be closed, the second valve 323 controls the second port of the first connecting pipe 321 to be closed, and controls the third port of the second connecting pipe 322 to be opened; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to be closed, and controls the fifth port of the third connecting pipe 331 to be opened; the high-pressure side of the compressor 21 is connected to the second heat exchanger 23 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, the low-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, and the first heat exchanger 22 is connected to the second heat exchanger 23; during operation, the first fan 11 does not work, the second fan 12 works, the indoor air enters the wind box 1 via the second connecting pipe 322, is cooled via the first heat exchanger 22, and is dried via the second heat exchanger 23 to form a dry airflow, and the dry airflow enters the room via the third connecting pipe 331.

[0141] Specifically, in the first dehumidification mode, the first heat exchanger 22 absorbs heat and condenses the indoor air to reduce its humidity; the second heat exchanger 23 releases heat and heats the condensed air to form dry air, which is then transported into the room.

[0142] See also Fig.12 , the second dehumidification mode is the upper air supply dehumidification mode; in the second dehumidification mode, the first valve 312 controls the air inlet pipe 311 to be closed, the second valve 323 controls the second port of the first connecting pipe 321 to be closed, and controls the third port of the second connecting pipe 322 to be opened; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to be closed, and controls the fifth port of the third connecting pipe 331 to be opened; the high-pressure side of the compressor 21 is connected to the first heat exchanger 22 via the first four-way reversing valve 24, and the low-pressure side of the compressor 21 is connected to the second heat exchanger 23 via the first four-way reversing valve 24 and the second four-way reversing valve 25 in sequence, and the first heat exchanger 22 and the second heat exchanger 23 are connected; when working, the first fan 11 works, and the second fan 12 does not work, and the indoor air enters the wind box 1 through the third connecting pipe 331, is cooled through the second heat exchanger 23, and is dried through the first heat exchanger 22 to form a dry airflow, and the dry airflow enters the room through the second connecting pipe 322.

[0143] Specifically, in the second dehumidification mode, the second heat exchanger 23 absorbs heat and condenses the indoor hot and humid air to reduce its humidity; the first heat exchanger 22 releases heat and heats the condensed supply air to form dry air, which is then transported into the room.

[0144] Specifically, the fresh air mode includes a first fresh air mode, a second fresh air mode and a third fresh air mode.

[0145] See also Fig.13, the first fresh air mode is the downward air supply fresh air mode; in the first fresh air mode, the heat pump unit 2 does not work; the first valve 312 controls the air inlet pipe 311 to open, the second valve 323 controls the second port of the first connecting pipe 321 to open, and controls the third port of the second connecting pipe 322 to close; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to close, and controls the fifth port of the third connecting pipe 331 to open; the second fan 12 works, the first fan 11 does not work, and the outside air enters the wind box 1 through the air inlet pipe 311 and the first connecting pipe 321, and then enters the room through the third connecting pipe 331.

[0146] See also Fig.14 The second fresh air mode is the downward air supply fresh air mode; in the second fresh air mode, the heat pump unit 2 does not work; the first valve 312 controls the air inlet pipe 311 to open, the second valve 323 controls the second port of the first connecting pipe 321 to close, and controls the third port of the second connecting pipe 322 to open; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the first fan 11 works, the second fan 12 does not work, and the outside air enters the wind box 1 through the air inlet pipe 311 and the fourth connecting pipe 332, and then enters the room through the second connecting pipe 322.

[0147] See also Fig.15 The third fresh air mode is an up and down air supply fresh air mode; in the third fresh air mode, the heat pump unit 2 does not work; the first valve 312 controls the air inlet pipe 311 to open, the second valve 323 controls the second port of the first connecting pipe 321 to close, and controls the third port of the second connecting pipe 322 to open; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to close, and controls the fifth port of the third connecting pipe 331 to open; the first fan 11 and the second fan 12 both work, and the outside air enters the wind box 1 through the air inlet pipe 311, and then enters the room through the third connecting pipe 331 and the second connecting pipe 322.

[0148] Specifically, the domestic hot water mode includes a first domestic hot water mode, a second domestic hot water mode, and a third domestic hot water mode.

[0149] See also Fig.16, the first domestic hot water mode is the heat pump heating water tank mode; in the first domestic hot water mode, the first valve 312 controls the air inlet pipe 311 to open, the second valve 323 controls the second port of the first connecting pipe 321 to open, and controls the third port of the second connecting pipe 322 to close; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the first fan 11 is working, and the second fan 12 is turned off; the high-pressure side of the compressor 21 is connected to the water tank heat exchanger 26, the low-pressure side of the compressor 21 is connected to the first heat exchanger 22, and the water tank heat exchanger 26 is connected to the first heat exchanger 22; the heat pump unit 2 is working, and the water tank heat exchanger 26 releases heat and heats the water tank 4.

[0150] See also Fig.17 , the second domestic hot water mode is the auxiliary heating water tank mode; in the second domestic hot water mode, the first valve 312 controls the air inlet pipe 311 to open, the second valve 323 controls the second port of the first connecting pipe 321 to open, and controls the third port of the second connecting pipe 322 to close; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the first fan 11 and the second fan 12 are both turned off, and the auxiliary heating device 5 heats the water tank 4.

[0151] See also Fig.18 , the third domestic hot water mode is a heat pump + auxiliary heating water tank mode; in the third domestic hot water mode, the first valve 312 controls the air inlet pipe 311 to open, the second valve 323 controls the second port of the first connecting pipe 321 to open, and controls the third port of the second connecting pipe 322 to close; the third valve 333 controls the sixth port of the fourth connecting pipe 332 to open, and controls the fifth port of the third connecting pipe 331 to close; the first fan 11 is working, and the second fan 12 is turned off; the high-pressure side of the compressor 21 is connected to the water tank heat exchanger 26, the low-pressure side of the compressor 21 is connected to the first heat exchanger 22, and the water tank heat exchanger 26 is connected to the first heat exchanger 22; the heat pump unit 2 is working, the water tank heat exchanger 26 releases heat and heats the water tank 4, and the auxiliary heating device 5 heats the water tank 4 at the same time.

[0152] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. Heat pump trigeneration system, It is characterized in that include: Bellows (1); Water tank (4); A heat pump unit (2) comprises a first heat exchanger (22), a second heat exchanger (23), a water tank heat exchanger (26) and a compressor (21); the first heat exchanger (22) and the second heat exchanger (23) are both located in the wind box (1); the water tank heat exchanger (26) is used for exchanging heat with the water tank (4); one of the high-pressure side and the low-pressure side of the compressor (21) is connected to the first heat exchanger (22); the other is selectively connected to the second heat exchanger (23) and one of the water tank heat exchanger (26); the second heat exchanger (23) and the water tank heat exchanger (26) are arranged in parallel; a first expansion valve (27) is arranged between the first heat exchanger (22) and the second heat exchanger (23); and a second expansion valve (28) is arranged between the first heat exchanger (22) and the water tank heat exchanger (26).

2. The heat pump trigeneration system according to claim 1, It is characterized in that The heat pump trigeneration system further includes an air duct device, which includes: An air inlet duct assembly (31), the air inlet duct assembly (31) being in communication with the wind box (1), and the air inlet duct assembly (31) being capable of being selectively opened or closed; a first air duct assembly (32), arranged corresponding to the first heat exchanger (22), comprising a first port, a second port and a third port, the first port being in communication with the wind box (1), and the second port and the third port being selectively openable; The second air duct assembly (33) is arranged corresponding to the second heat exchanger (23), and comprises a fourth port, a fifth port and a sixth port, wherein the fourth port is connected to the wind box (1), and the fifth port and the sixth port can be opened selectively.

3. The heat pump trigeneration system according to claim 2, It is characterized in that The air inlet duct assembly (31) comprises: an air inlet pipe (311), one end of the air inlet pipe (311) being in communication with the wind box (1); The first valve (312) is arranged in the air inlet pipe (311) and is used to control the opening or closing of the air inlet pipe (311).

4. The heat pump trigeneration system according to claim 2, It is characterized in that The first air duct assembly (32) comprises: A first connecting pipe (321), one end of the first connecting pipe (321) being the first port, and the other end of the first connecting pipe (321) being the second port; A second connecting pipe (322), one end of which is connected to the side of the first connecting pipe (321), and the other end of which is the third port; The second valve (323) is disposed at the connection between the second connecting pipe (322) and the first connecting pipe (321), and is used to control whether the second port or the third port is selectively opened.

5. The heat pump trigeneration system according to claim 2, It is characterized in that The second air duct assembly (33) comprises: A third connecting pipe (331), one end of the third connecting pipe (331) being the fourth port, and the other end of the third connecting pipe (331) being the fifth port; a fourth connecting pipe (332), one end of which is connected to the side of the third connecting pipe (331), and the other end of which is the sixth port; The third valve (333) is disposed at the connection between the fourth connecting pipe (332) and the third connecting pipe (331), and is used to control whether the fifth port or the sixth port is selectively opened.

6. The heat pump trigeneration system according to claim 2, It is characterized in that A first fan (11) is arranged in the wind box (1) between the first heat exchanger (22) and the inlet end of the first air duct assembly (32); A second fan (12) is provided in the wind box (1) between the second heat exchanger (23) and the inlet end of the second air duct assembly (33).

7. The heat pump trigeneration system according to any one of claims 1 to 6, It is characterized in that The heat pump trigeneration system further comprises a reversing valve assembly, through which the high-pressure side of the compressor (21) can be selectively connected to one of the first heat exchanger (22), the second heat exchanger (23) and the water tank heat exchanger (26), and the low-pressure side of the compressor (21) can be selectively connected to one of the other two heat exchangers not connected to the high-pressure side through the reversing valve assembly.

8. The heat pump trigeneration system according to claim 7, It is characterized in that The reversing valve assembly comprises a first four-way reversing valve (24) and a second four-way reversing valve (25) which are connected to each other.

9. The heat pump trigeneration system according to any one of claims 1 to 6, It is characterized in that The heat pump trigeneration system further comprises an auxiliary heating device (5), and the auxiliary heating device (5) is capable of selectively heating the water tank (4).

10. The heat pump trigeneration system according to claim 9, It is characterized in that The auxiliary heating device (5) is one of a gas water heater, an electric water heater and a solar water heater.

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