Heat pump apparatus

Abstract

The utility model discloses heat pump equipment which comprises a compression mechanism, a first heat exchanger, a second heat exchanger, a throttling mechanism, a confluence three-way regulating valve, a user terminal and an energy storage device. The outlet end of the compression mechanism is connected with the outlet end of the compression mechanism through the first heat exchanger, the throttling mechanism and the second heat exchanger in sequence. The water side outlet end of the second heat exchanger is connected with the energy storage device; the water side inlet end of the second heat exchanger is connected with the energy storage device through the outlet end of the confluence three-way regulating valve and the direct flow inlet end of the confluence three-way regulating valve in sequence; the bypass flow inlet end of the confluence three-way regulating valve is connected with a pipeline between the water side outlet end of the second heat exchanger and the energy storage device; a user terminal inlet is connected with the energy storage device, and a user terminal outlet is connected with an outlet end pipeline of the converging three-way regulating valve; the energy storage device is characterized in that energy loss caused by water mixing in the energy storage device can be reduced; in the system starting stage, the water temperature at the tail end of a user can reach a normal working state more quickly; and the energy storage device can realize cold storage and heat storage.

Description

Technical Field

[0001] The utility model relates to a heat pump device, belonging to the technical field of heat pumps. Background Art

[0002] With the development of the economy and the improvement of people's living standards, at present, heat pump devices have been widely used in residential and public buildings. However, during the application of heat pump devices, since it is very difficult for the cooling or heating capacity output by the heat pump device to be consistent with the change of the cooling and heating load of users, when the heat pump device is used to produce cold and hot water, an energy storage device is usually arranged in the system to allocate the load change and ensure the stable operation of the heat pump device; as Figure 4 shown is a heat pump device for producing chilled water. The inlet end of its compression mechanism 1 is connected to the second heat exchanger 4, and the outlet end of its compression mechanism 1 is connected to the first heat exchanger 3; therefore, the second heat exchanger 4 is an evaporator for producing chilled water, and the first heat exchanger 3 is a condenser for dissipating the condensation heat generated by refrigeration to the environment; the heat pump device adopts a secondary pump water system, and an energy storage device 16 is arranged in the system. The primary pump 9 is used to maintain the circulation of the primary network water system between the second heat exchanger 4 and the energy storage device 16; the secondary pump 13 is used to maintain the circulation of the secondary network water system between the energy storage device 16 and the user terminal 14.

[0003] During actual application, when the inlet end of the compression mechanism 1 becomes connected to the first heat exchanger 3, and the outlet end of the compression mechanism 1 becomes connected to the second heat exchanger 4; the second heat exchanger 4 becomes a condenser for producing hot water, and the first heat exchanger 3 becomes an evaporator for absorbing heat from the environment. At this time, the water system of the heat pump device is the same as the Figure 4 shown water system and is still a secondary pump water system.

[0004] The above two heat pump systems are applicable to the application cases where soil, groundwater, surface water, etc. are used as low-temperature heat sources or cooling sources for absorbing refrigeration condensation heat; in actual application, when the outdoor air is used as a low-temperature heat source or a cooling source for absorbing refrigeration condensation heat, the heat pump device formed is as Figure 5 shown; Figure 5 The difference between the shown heat pump device and the Figure 4 shown heat pump device is that: a four-way valve 70 is added to the refrigerant system of the Figure 5 shown heat pump device, and the water systems in the two heat pump devices are exactly the same; Figure 5 An energy storage device 16 is also arranged in the water system of the Figure 5 ​When the shown heat pump device works in summer, the second heat exchanger 4 is an evaporator for producing chilled water, while the first heat exchanger 3 is a condenser for dissipating the condensation heat generated by refrigeration to the environment. Figure 5 When the shown heat pump device works in winter, the second heat exchanger 4 becomes a condenser for producing hot water, while the first heat exchanger 3 becomes an evaporator for absorbing heat from outdoor air.

[0005] When the compression mechanism 1 of the above three heat pump devices is a fixed-frequency compressor, since the output refrigeration or heating capacity of the heat pump device cannot be adjusted with the change of the user's cooling and heating load during operation, an energy storage device 16 is usually set in the heat pump device. Especially when the water capacity of the heat pump system is small, the energy storage device 16 is added to increase the water capacity of the heat pump system, ensure the stable operation of the heat pump device, and avoid the frequent start and stop of the compression mechanism 1. When the compression mechanism 1 in the above three heat pump devices is a variable-frequency compressor, although the compression mechanism 1 has the ability to adjust the output refrigeration or heating capacity, generally due to the limited adjustment ability of the compression mechanism 1, it cannot fully meet the change requirements of the user's cooling and heating load. Therefore, an energy storage device 16 is generally also set in the system of the heat pump device. For Figure 5 For the shown heat pump device, since the outdoor air is used as the low-temperature heat source for heating in winter, frost will form on the surface of its first heat exchanger 3, and defrosting must be carried out regularly. When the heat pump device uses reverse-cycle hot gas defrosting, due to the existence of the energy storage device 16, the adverse impact of the defrosting process on the hot water temperature sent to the user terminal 14 can be reduced, and there is a better user experience.

[0006] Although the existence of the energy storage device 16 can make the heat pump device operate more stably and make the water temperature sent to the user terminal 14 more stable; however, setting the energy storage device 16 in the heat pump system also brings adverse effects, causing the following defects in the heat pump device: 1) The supply water and return water of the primary network, as well as the supply water and return water of the secondary network, directly contact and mix in the energy storage device 16, resulting in mixing water loss and increasing the operating energy consumption of the heat pump device. 2) Due to the existence of the energy storage device 16, the water capacity of the heat pump system is increased. Therefore, during the user startup stage, the heat pump device will require more startup operation time to make the water temperature sent to the user terminal 14 reach the normal working state. For intermittent users and heat pump systems that use the energy storage device 16 for cold storage and heat storage, this adverse impact is more prominent, resulting in a poor user experience and being unfavorable for the user's behavioral energy conservation. Summary of the Invention

[0007] The purpose of the present utility model is to provide a heat pump device that can reduce the energy loss caused by water mixing in the energy storage device, enable the water temperature at the user terminal to reach the normal working state faster during the system startup stage, and enable the energy storage device to realize cold storage and heat storage.

[0008] To overcome the problems existing in the above technologies, the technical solution of the present utility model for solving technical problems is as follows:

[0009] 1. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14), and an energy storage device (16), characterized in that: the heat pump device further comprises a combined flow three-way regulating valve (10); the outlet end of the compression mechanism (1) is successively connected to the inlet end of the compression mechanism (1) through the first heat exchanger (3), the throttling mechanism (5), and the second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is successively connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is successively connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the combined flow three-way regulating valve (10), and the direct-current inlet end (15) of the combined flow three-way regulating valve (10); the bypass inlet end (12) of the combined flow three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is successively connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is successively connected to the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

[0010] 2. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14), and an energy storage device (16), characterized in that: the heat pump device further comprises a combined flow three-way regulating valve (10); the inlet end of the compression mechanism (1) is successively connected to the outlet end of the compression mechanism (1) through the first heat exchanger (3), the throttling mechanism (5), and the second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is successively connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is successively connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the combined flow three-way regulating valve (10), and the direct-current inlet end (15) of the combined flow three-way regulating valve (10); the bypass inlet end (12) of the combined flow three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is successively connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is successively connected to the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

[0011] The above two technical solutions can be further improved by adding a check valve (20) and a flow control valve (23) to the system respectively. The connection mode of the check valve (20) and the flow control valve (23) in the system is as follows: the inlet end of the check valve (20) is connected to the outlet pipe of the confluence three-way regulating valve (10), and the outlet end of the check valve (20) is connected to the direct current inlet end (15) of the confluence three-way regulating valve (10); the inlet end of the flow control valve (23) is connected to the outlet end of the primary water supply pipe, and the outlet end of the flow control valve (23) is connected to the energy storage device (16).

[0012] The energy storage device (16) in the above improvement solution can be further improved as follows: the energy storage device (16) at least includes two energy storage water tanks, namely a first energy storage water tank (21) and a second energy storage water tank (22); the outlet end of the flow control valve (23) is connected to the first energy storage water tank (21); the inlet end of the secondary water supply pipe (18) is also connected to the first energy storage water tank (21); the first energy storage water tank (21) is connected to the second energy storage water tank (22) through a connecting pipe (19); the second energy storage water tank (22) is connected to the outlet end of the check valve (20) and the direct current inlet end (15) of the confluence three-way regulating valve (10).

[0013] 3. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: the heat pump device further comprises a confluence three-way regulating valve (10); the outlet end of the compression mechanism (1) is sequentially connected to the inlet end of the compression mechanism (1) through the first heat exchanger (3), the throttling mechanism (5) and the second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the confluence three-way regulating valve (10) and the direct current inlet end (15) of the confluence three-way regulating valve (10); the bypass inlet end (12) of the confluence three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the primary water supply pipe through the outlet end and the inlet end of the secondary water supply pipe (18).

[0014] 4. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: the heat pump device further comprises a combined flow three-way regulating valve (10); the inlet end of the compression mechanism (1) is sequentially connected to the outlet end of the compression mechanism (1) through the first heat exchanger (3), the throttling mechanism (5), and the second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the combined flow three-way regulating valve (10), and the direct-current inlet end (15) of the combined flow three-way regulating valve (10); the bypass inlet end (12) of the combined flow three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the primary water supply pipe through the outlet end and the inlet end of the secondary water supply pipe (18).

[0015] The above technical solutions 3 and 4 can be further improved by adding a check valve (20) and a flow control valve (23) to the system respectively. The connection modes of the check valve (20) and the flow control valve (23) in the system are as follows: the inlet end of the check valve (20) is connected to the pipeline at the outlet end of the combined flow three-way regulating valve (10), and the outlet end of the check valve (20) is connected to the pipeline at the direct-current inlet end (15) of the combined flow three-way regulating valve (10); the inlet end of the flow control valve (23) is connected to the outlet end of the primary water supply pipe, and the outlet end of the flow control valve (23) is connected to the inlet end of the secondary water supply pipe (18) and the energy storage device (16).

[0016] The energy storage device (16) in the above improvement solution can be further improved as follows: the energy storage device (16) at least includes two energy storage water tanks, namely a first energy storage water tank (21) and a second energy storage water tank (22); the first energy storage water tank (21) is connected to the outlet end of the flow control valve (23) and the inlet end of the secondary water supply pipe (18) through a connection port; the first energy storage water tank (21) is connected to the second energy storage water tank (22) through a communicating pipe (19); the second energy storage water tank (22) is connected to the outlet end of the check valve (20) and the direct-current inlet end (15) of the combined flow three-way regulating valve (10).

[0017] 5. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: the heat pump device further comprises a flow dividing three-way regulating valve (11); the outlet end of the compression mechanism (1) is sequentially connected to the inlet end of the compression mechanism (1) through the first heat exchanger (3), the throttling mechanism (5), and the second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe, the outlet end of the primary water supply pipe, the inlet end of the flow dividing three-way regulating valve (11), and the direct current outlet end (24) of the flow dividing three-way regulating valve (11); the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe and the inlet end of the primary return water pipe; the bypass outlet end (25) of the flow dividing three-way regulating valve (11) is connected to the primary return water pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the energy storage device (16) or the pipe between the direct current outlet end (24) of the flow dividing three-way regulating valve (11) and the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

[0018] 6. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: the heat pump device further comprises a flow dividing three-way regulating valve (11); the inlet end of the compression mechanism (1) is sequentially connected to the outlet end of the compression mechanism (1) through the first heat exchanger (3), the throttling mechanism (5), and the second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe, the outlet end of the primary water supply pipe, the inlet end of the flow dividing three-way regulating valve (11), and the direct current outlet end (24) of the flow dividing three-way regulating valve (11); the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe and the inlet end of the primary return water pipe; the bypass outlet end (25) of the flow dividing three-way regulating valve (11) is connected to the primary return water pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the energy storage device (16) or the pipe between the direct current outlet end (24) of the flow dividing three-way regulating valve (11) and the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. It can reduce the energy loss caused by water mixing in the energy storage device;

[0021] 2. During the system startup phase, it can enable the water temperature at the user terminal to reach the normal working state faster;

[0022] 3. It can enable the energy storage device to achieve cold storage and heat storage;

[0023] 4. The utility model is applicable to heat pump equipment for industrial and civil use, and is particularly applicable to occasions with cold storage and heat storage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of Embodiment 1 of the utility model;

[0025] Figure 2 is a schematic structural diagram of Embodiment 2 of the utility model;

[0026] Figure 3 is a schematic structural diagram of Embodiment 3 of the utility model;

[0027] Figure 4 is a schematic structural diagram of the prior art;

[0028] Figure 5 is a schematic structural diagram of the prior art;

[0029] Figure 6 is a schematic structural diagram of Embodiment 7 of the utility model;

[0030] Figure 7 is a schematic structural diagram of Embodiment 8 of the utility model. DETAILED DESCRIPTION OF THE INVENTION

[0031] The following further details the content of the utility model with reference to the accompanying drawings.

[0032] Embodiment 1

[0033] As Figure 1 shown, this embodiment is a heat pump device for producing chilled water for air conditioners. The entire device includes the following components: a compression mechanism 1, a throttling mechanism 5, a first heat exchanger 3, a second heat exchanger 4, a user terminal 14, an energy storage device 16, a combination three-way regulating valve 10, a primary water pump 9, and a secondary water pump 13. The throttling mechanism 5 is an electronic expansion valve. The combination three-way regulating valve 10 is an electric three-way regulating valve. During operation, the second heat exchanger 4 is an evaporator for producing chilled water for air conditioners; the first heat exchanger 3 is a condenser for dissipating the condensation heat generated by refrigeration to the environment (such as water or soil, etc.).

[0034] This heat pump device is divided into two parts: a refrigerant system and a water system; their working processes are described as follows.

[0035] (1) Working process of the refrigerant system

[0036] After the refrigerant is discharged from the outlet end of the compression mechanism 1, it successively passes through the first heat exchanger 3, the throttling mechanism 5, and the second heat exchanger 4, returns to the inlet end of the compression mechanism 1, and enters the compression mechanism 1 to be recompressed. Thus, one cycle is completed.

[0037] (2) Working process of the water system

[0038] The water system of this heat pump device is a secondary pump system. The primary pipe network consists of the second heat exchanger 4, the primary water pump 9, the confluence three-way regulating valve 10, the energy storage device 16, the primary water supply pipe, and the primary water return pipe. The secondary pipe network consists of the secondary water pump 13, the user terminal 14, the energy storage device 16, the secondary water supply pipe 18, and the secondary water return pipe 17.

[0039] Figure 1 During the working process of the water system of the shown heat pump device, it is divided into three stages in the chronological order of starting and running: the rapid temperature drop of the secondary pipe network water temperature, the overall temperature drop of the energy storage device 16, and the stable operation of the water system. The working processes of the water system in the above three stages are described as follows respectively.

[0040] 1) Stage of rapid temperature drop of the secondary pipe network water temperature

[0041] This stage appears Figure 1 at the beginning of each start of the shown heat pump device. At this time, the water temperature in the entire water system is relatively high. After the chilled water enters the second heat exchanger 4 and exchanges heat with the refrigerant once and is cooled, the water temperature coming out of the second heat exchanger 4 still cannot reach the normal use requirement of the user terminal 14. Therefore, in order to rapidly cool the chilled water temperature sent to the user terminal 14 to reach the normal use requirement, shorten the waiting time of the user, and improve the user experience, the water system needs to use the operation of this stage. During the work of this stage, the direct current inlet end 15 of the confluence three-way regulating valve 10 is closed; the bypass inlet end 12 of the confluence three-way regulating valve 10 is fully opened. The primary water pump 9 and the secondary water pump 13 both work normally.

[0042] The working process of the water system is as follows: After the chilled water is pumped out from the outlet end of the primary water pump 9, it enters the second heat exchanger 4 through the water side inlet end of the second heat exchanger 4 and exchanges heat with the refrigerant. After the chilled water releases heat and is cooled down, it successively passes through the water side outlet end of the second heat exchanger 4 and the inlet end of the primary supply water pipe, and enters the primary supply water pipe and is divided into two paths; the first path successively passes through the bypass inlet end 12 of the confluence three-way regulating valve 10, the outlet end of the confluence three-way regulating valve 10, and the inlet end of the primary return water pipe and enters the primary return water pipe; the second path successively passes through the outlet end of the primary supply water pipe, the energy storage device 16, the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply water pipe 18, the outlet end of the secondary supply water pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; after the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14 and the inlet end and outlet end of the secondary return water pipe 17, and also enters the primary return water pipe; after the two paths of chilled water are mixed in the primary return water pipe, they successively pass through the outlet end of the primary return water pipe and the suction end of the primary water pump 9, and enter the primary water pump 9 to be pressurized again, thus completing a cycle of the primary water system.

[0043] At this stage, since the outlet end of the primary supply water pipe is usually connected to the upper space of the energy storage device 16, and the suction end of the secondary water pump 13 is also connected to the upper space of the energy storage device 16, during the working process at this stage, the chilled water in the lower space of the energy storage device 16 will not enter the working cycle of the water system. Therefore, the chilled water sent to the user terminal 14 can be quickly cooled down.

[0044] 2) The stage of overall water temperature reduction of the energy storage device 16

[0045] Figure 1 After the heat pump equipment shown operates in the first stage, the water temperature of the chilled water sent to the user terminal 14 can already meet the normal usage requirements, but at this time, the water temperature of the chilled water in the lower space of the energy storage device 16 is still very high; therefore, it is necessary to gradually cool the chilled water in the lower space of the energy storage device 16 in this stage.

[0046] During the operation of this stage, the primary water pump 9 and the secondary water pump 13 both operate normally. The direct current inlet end 15 of the confluence three-way regulating valve 10 is opened, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is also opened; during the working process, the confluence three-way regulating valve 10 regulates the opening degrees of the direct current inlet end 15 of the confluence three-way regulating valve 10 and the bypass inlet end 12 of the confluence three-way regulating valve 10 according to the water temperature of the chilled water at the water side outlet end of the second heat exchanger 4; that is: during operation, by regulating the opening degree of the confluence three-way regulating valve 10, the water temperature of the chilled water at the water side outlet end of the second heat exchanger 4 is maintained at the expected value (usually the water temperature of the chilled water required by the user terminal 14), while gradually cooling the chilled water in the lower space of the energy storage device 16, and also ensuring that the water temperature of the chilled water sent to the user terminal 14 reaches the normal working requirements.

[0047] The working process of the water system is as follows: The chilled water coming out from the outlet end of the water side of the second heat exchanger 4 passes through the inlet end of the primary water supply pipe and enters the primary water supply pipe, where it is divided into two paths; The first path enters the combination three-way regulating valve 10 through the bypass inlet end 12 of the combination three-way regulating valve 10; The second path enters the energy storage device 16 through the outlet end of the primary water supply pipe and is further divided into two parts; The first part of the chilled water with a lower temperature, under the action of the water pressure difference, makes the chilled water with a higher temperature in the lower space of the energy storage device 16 enter the combination three-way regulating valve 10 through the direct flow inlet end 15 of the combination three-way regulating valve 10 as well; After being mixed with the first path of chilled water entering the combination three-way regulating valve 10 through the bypass inlet end 12 of the combination three-way regulating valve 10, it then passes through the outlet end of the combination three-way regulating valve 10 and the inlet end of the primary water return pipe in sequence and enters the primary water return pipe;

[0048] The other part of the chilled water with a lower temperature entering the energy storage device 16 passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14 in sequence and enters the user terminal 14 to provide cooling for the user; After the chilled water absorbs heat and the water temperature rises, it passes through the outlet of the user terminal 14, the inlet end of the secondary water return pipe 17, and the outlet end of the secondary water return pipe 17 in sequence and also enters the primary water return pipe; After being mixed with the chilled water entering the primary water return pipe through the outlet end of the combination three-way regulating valve 10, it then passes through the outlet end of the primary water return pipe, the suction end of the primary water pump 9, the outlet end of the primary water pump 9, and the inlet end of the water side of the second heat exchanger 4 in sequence and returns to the outlet end of the water side of the second heat exchanger 4 again; Thus, a cycle of the primary water system is completed.

[0049] As the chilled water in the lower space of the energy storage device 16 is gradually cooled, the opening degree of the bypass inlet end 12 of the combination three-way regulating valve 10 becomes smaller and smaller until it is completely closed; while the opening degree of the direct flow inlet end 15 of the combination three-way regulating valve 10 becomes larger and larger until it is completely opened; Thus, the overall water temperature reduction stage of the energy storage device 16 ends, Figure 1 The shown heat pump equipment enters the third stage of operation, that is: the stable operation stage of the water system.

[0050] 3) Stable operation stage of the water system

[0051] During the operation of this stage, the primary water pump 9 and the secondary water pump 13 both work normally. The direct flow inlet end 15 of the combination three-way regulating valve 10 is fully opened, and the bypass inlet end 12 of the combination three-way regulating valve 10 is closed.

[0052] If the compression mechanism 1 is a variable-frequency compressor, during operation, the compression mechanism 1 adjusts the operating frequency of the compressor according to the chilled water temperature at the water-side outlet end of the second heat exchanger 4; that is: during operation, by adjusting the operating frequency of the compressor, the chilled water temperature at the water-side outlet end of the second heat exchanger 4 is maintained at the desired value. If the compression mechanism 1 is a fixed-frequency compressor, during operation, the compression mechanism 1 adopts the working mode of starting and stopping the compressor according to the change of the chilled water temperature at the water-side outlet end of the second heat exchanger 4 to maintain the chilled water temperature at the water-side outlet end of the second heat exchanger 4 within the desired range.

[0053] The working process of the water system is as follows: The chilled water coming out from the water-side outlet end of the second heat exchanger 4 sequentially passes through the inlet end of the primary water supply pipe, the outlet end of the primary water supply pipe, and enters the energy storage device 16 where it is divided into two parts; the first part of the chilled water, under the action of the water pressure difference, makes the chilled water in the lower space of the energy storage device 16 sequentially pass through the direct-current inlet end 15 of the combined three-way regulating valve 10, the outlet end of the combined three-way regulating valve 10, and the inlet end of the primary return water pipe, and enters the primary return water pipe;

[0054] The second part of the chilled water entering the energy storage device 16 sequentially passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; after the chilled water absorbs heat and the water temperature rises, it sequentially passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and also enters the primary return water pipe; after being mixed with the chilled water entering the primary return water pipe through the outlet end of the combined three-way regulating valve 10, it then sequentially passes through the outlet end of the primary return water pipe, the suction end of the primary water pump 9, the outlet end of the primary water pump 9, and the water-side inlet end of the second heat exchanger 4, and returns to the water-side outlet end of the second heat exchanger 4 again; thus, a cycle of the water system is completed.

[0055] Figure 1 In the water system of the shown heat pump device, the primary water pump 9 is arranged at the water-side inlet end of the second heat exchanger 4, and its connection method is: the suction end of the primary water pump 9 is connected to the outlet end of the primary return water pipe, and the outlet end of the primary water pump 9 is connected to the water-side inlet end of the second heat exchanger 4. In actual application, the primary water pump 9 can also be arranged at the water-side outlet end of the second heat exchanger 4. At this time, its connection method is: the suction end of the primary water pump 9 is connected to the water-side outlet end of the second heat exchanger 4, and the outlet end of the primary water pump 9 is connected to the inlet end of the primary water supply pipe. The above connection method of the primary water pump 9 is applicable to all embodiments and their variant schemes of the present invention.

[0056] In Figure 1In the water system of the shown heat pump device, the secondary water pump 13 is arranged at the inlet end of the secondary water supply pipe 18, and its connection method is as follows: the suction end of the secondary water pump 13 is connected to the energy storage device 16, and the outlet end of the secondary water pump 13 is connected to the inlet end of the secondary water supply pipe 18. However, in actual application, the secondary water pump 13 can also be arranged at the outlet end of the secondary water return pipe 17. At this time, its connection method is: the suction end of the secondary water pump 13 is connected to the outlet end of the secondary water return pipe 17, and the outlet end of the secondary water pump 13 is connected to the primary water return pipe. The above connection method of the secondary water pump 13 is applicable to all embodiments and variant schemes of the present invention.

[0057] In Figure 1 In the water system of the shown heat pump device, the inlet end of the secondary water supply pipe 18 is connected to the energy storage device 16 successively through the outlet end of the secondary water pump 13 and the suction end of the secondary water pump 13; when the secondary water pump 13 is arranged at the outlet end of the secondary water return pipe 17, the inlet end of the secondary water supply pipe 18 is directly connected to the energy storage device 16; usually, it is connected to the upper space of the energy storage device 16. The disadvantages of the above two schemes are as follows: during the rapid cooling stage of the secondary pipe network water temperature, part of the water in the energy storage device 16 will participate in the circulation of the water system. Therefore, to a certain extent, it will prolong the time for the rapid cooling of the chilled water temperature to reach the normal use requirements. In actual application, there are the following two further improvement schemes.

[0058] When the secondary water pump 13 is arranged at the inlet end of the secondary water supply pipe 18, the connection method of improvement scheme one is: the inlet end of the secondary water supply pipe 18 is connected to the primary water supply pipe successively through the outlet end of the secondary water pump 13 and the suction end of the secondary water pump 13.

[0059] When the secondary water pump 13 is arranged at the outlet end of the secondary water return pipe 17, the connection method of improvement scheme two is: the inlet end of the secondary water supply pipe 18 is directly connected to the primary water supply pipe.

[0060] The above two improvement schemes can avoid the water in the energy storage device 16 from participating in the circulation of the water system during the rapid cooling stage of the secondary pipe network water temperature, and can shorten the time for the rapid cooling of the chilled water temperature to reach the normal use requirements.

[0061] The above two improvement schemes are also applicable to the heat pump device schemes described in Embodiment 3 and Embodiment 4.

[0062] For Figure 1 The energy storage device 16 of the shown heat pump device can also adopt Figure 2 the energy storage device 16 in the shown scheme, that is: the energy storage device 16 at least includes two energy storage water tanks, namely the first energy storage water tank 21 and the second energy storage water tank 22. At this time, the energy storage device 16 has the following four connection methods in the system.

[0063] 1) When the secondary water pump 13 is arranged at the inlet end of the secondary water supply pipe 18, connection method one:

[0064] The outlet end of the primary water supply pipe is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the first energy storage water tank 21 of the energy storage device 16 in sequence through the outlet end and the suction end of the secondary water pump 13; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through the connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the DC inlet end 15 of the combined three-way regulating valve 10.

[0065] 2) When the secondary water pump 13 is arranged at the outlet end of the secondary water return pipe 17, Connection Method 2:

[0066] The outlet end of the primary water supply pipe is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the first energy storage water tank 21 of the energy storage device 16; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through the connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the DC inlet end 15 of the combined three-way regulating valve 10.

[0067] 3) When the secondary water pump 13 is arranged at the inlet end of the secondary water supply pipe 18, Connection Method 3:

[0068] The outlet end of the primary water supply pipe is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the primary water supply pipe in sequence through the outlet end and the suction end of the secondary water pump 13; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through the connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the DC inlet end 15 of the combined three-way regulating valve 10.

[0069] 4) When the secondary water pump 13 is arranged at the outlet end of the secondary water return pipe 17, Connection Method 4:

[0070] The outlet end of the primary water supply pipe is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the primary water supply pipe; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through the connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the DC inlet end 15 of the combined three-way regulating valve 10.

[0071] The above four connection schemes are also applicable to the heat pump equipment schemes described in Embodiment 3 and Embodiment 4.

[0072] Embodiment 2

[0073] As Figure 2 shown, this embodiment is also a heat pump equipment for producing air-conditioning chilled water; it is the same as Figure 1The differences of the shown heat pump device are as follows: a flow control valve 23 and a check valve 20 are added to the water system of the heat pump device; the energy storage device 16 includes at least two energy storage water tanks, namely a first energy storage water tank 21 and a second energy storage water tank 22; during operation, the energy storage device 16 can store cold energy during the low valley electricity period by utilizing the peak-valley electricity price difference.

[0074] The connection mode of the flow control valve 23 in the system is: the inlet end of the flow control valve 23 is connected to the outlet end of the primary water supply pipe, and the outlet end of the flow control valve 23 is connected to the first energy storage water tank 21 of the energy storage device 16.

[0075] The connection mode of the check valve 20 in the system is: the inlet end of the check valve 20 is connected to the pipe at the outlet end of the combined three-way regulating valve 10, and the outlet end of the check valve 20 is connected to the pipe at the direct current inlet end 15 of the combined three-way regulating valve 10.

[0076] The connection mode of the energy storage device 16 in the system is: the outlet end of the flow control valve 23 is connected to the first energy storage water tank 21; the inlet end of the secondary water supply pipe 18 is connected to the outlet end of the secondary water pump 13, and the suction end of the secondary water pump 13 is also connected to the first energy storage water tank 21; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through a connecting pipe 19; the second energy storage water tank 22 is simultaneously connected to the outlet end of the check valve 20 and the direct current inlet end 15 of the combined three-way regulating valve 10.

[0077] The throttling mechanism 5 is an electronic expansion valve. The combined three-way regulating valve 10 is an electric three-way regulating valve. The flow control valve 23 is a solenoid valve. During operation, the second heat exchanger 4 is an evaporator for producing air-conditioning chilled water; the first heat exchanger 3 is a condenser for dissipating the condensation heat generated by refrigeration to the environment (such as water or soil, etc.).

[0078] This heat pump device is divided into two parts: a refrigerant system and a water system; their working processes are described as follows respectively.

[0079] (1) Working process of the refrigerant system

[0080] The refrigerant working process of this embodiment is the same as that of Figure 1 the refrigerant working process under the scheme shown in Embodiment 1.

[0081] (2) Working process of the water system

[0082] The water system of the heat pump device in this embodiment is also a secondary pump system. The primary pipe network consists of a second heat exchanger 4, a primary water pump 9, a combined three-way regulating valve 10, an energy storage device 16 (including a first energy storage water tank 21, a second energy storage water tank 22, and a connecting pipe 19), a flow control valve 23, a check valve 20, a primary water supply pipe, and a primary water return pipe. The secondary pipe network consists of a secondary water pump 13, user terminals 14, an energy storage device 16 (including a first energy storage water tank 21, a second energy storage water tank 22, and a connecting pipe 19), a secondary water supply pipe 18, and a secondary water return pipe 17.

[0083] Figure 2 During the operation of the water system of the heat pump device shown, according to the chronological order of startup and operation, it is divided into three stages: rapid cooling of the water temperature in the secondary pipe network, overall cooling of the water temperature in the energy storage device 16, and stable operation of the water system, and there is also a chilled water storage operation stage. The working processes of the water system in the above four stages are described as follows.

[0084] 1) Stage of rapid cooling of the water temperature in the secondary pipe network

[0085] This stage appears Figure 2 at the beginning of each startup of the heat pump device shown. At this time, the water temperature in the entire water system is relatively high. After the chilled water enters the second heat exchanger 4 and exchanges heat with the refrigerant for the first time and is cooled, the water temperature coming out of the second heat exchanger 4 still does not meet the normal use requirements of the user terminals 14. Therefore, in order to quickly cool the water temperature of the chilled water sent to the user terminals 14 to meet the normal use requirements, shorten the waiting time of users, and improve the user experience; the water system needs to use the operation of this stage.

[0086] During the operation of this stage, the direct current inlet end 15 of the combined three-way regulating valve 10 is closed; the bypass inlet end 12 of the combined three-way regulating valve 10 is fully open. The primary water pump 9 and the secondary water pump 13 are both operating normally. The flow control valve 23 is fully open.

[0087] The working process of the water system is as follows: After the chilled water is pumped out from the outlet end of the primary water pump 9, it enters the second heat exchanger 4 through the water side inlet end of the second heat exchanger 4 and exchanges heat with the refrigerant. After the chilled water releases heat and is cooled down, it successively passes through the water side outlet end of the second heat exchanger 4 and the inlet end of the primary supply water pipe, and enters the primary supply water pipe and is divided into two paths; the first path successively passes through the bypass inlet end 12 of the confluence three-way regulating valve 10, the outlet end of the confluence three-way regulating valve 10, and the inlet end of the primary return water pipe and enters the primary return water pipe; the second path successively passes through the outlet end of the primary supply water pipe, the inlet end of the flow control valve 23, the outlet end of the flow control valve 23, the first energy storage water tank 21 of the energy storage device 16, the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply water pipe 18, the outlet end of the secondary supply water pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; after the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and also enters the primary return water pipe; after the two paths of chilled water are mixed in the primary return water pipe, they successively pass through the outlet end of the primary return water pipe and the suction end of the primary water pump 9, and enter the primary water pump 9 to be pressurized again, thus completing a cycle of the primary water system.

[0088] 2) Overall water temperature reduction stage of the energy storage device 16

[0089] Figure 2 After the heat pump equipment shown has operated in the first stage, the water temperature of the chilled water sent to the user terminal 14 can already meet the normal usage requirements, but at this time, the water temperature of the chilled water in the second energy storage water tank 22 of the energy storage device 16 is still very high; therefore, it is necessary to gradually cool the chilled water in the second energy storage water tank 22 in this stage.

[0090] During the operation of this stage, the flow control valve 23 is fully open; the primary water pump 9 and the secondary water pump 13 are both operating normally. The direct current inlet end 15 of the confluence three-way regulating valve 10 and the bypass inlet end 12 of the confluence three-way regulating valve 10 are both open; during the working process, the confluence three-way regulating valve 10 regulates the opening degrees of the direct current inlet end 15 of the confluence three-way regulating valve 10 and the bypass inlet end 12 of the confluence three-way regulating valve 10 according to the chilled water temperature at the water side outlet end of the second heat exchanger 4; that is: during operation, by regulating the opening degree of the confluence three-way regulating valve 10, the chilled water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the expected value, while gradually cooling the chilled water in the second energy storage water tank 22, and also ensuring that the chilled water temperature sent to the user terminal 14 meets the normal working requirements.

[0091] The working process of the water system is as follows: The chilled water coming out from the outlet end of the water side of the second heat exchanger 4 passes through the inlet end of the primary supply pipe and enters the primary supply pipe, where it is divided into two paths. The first path enters the confluence three-way regulating valve 10 through the bypass inlet end 12 of the confluence three-way regulating valve 10. The second path successively passes through the outlet end of the primary supply pipe, the inlet end of the flow control valve 23, and the outlet end of the flow control valve 23, and enters the first energy storage water tank 21 of the energy storage device 16, where it is further divided into two parts. The first part of the chilled water with a lower temperature, under the action of the water pressure difference, enables the chilled water with a higher temperature in the second energy storage water tank 22 to pass through the direct flow inlet end 15 of the confluence three-way regulating valve 10 through the connecting pipe 19 and also enters the confluence three-way regulating valve 10. After being mixed with the first path of chilled water entering the confluence three-way regulating valve 10 through the bypass inlet end 12 of the confluence three-way regulating valve 10, it successively passes through the outlet end of the confluence three-way regulating valve 10 and the inlet end of the primary return pipe and enters the primary return pipe.

[0092] The other part of the chilled water with a lower temperature entering the first energy storage water tank 21 successively passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply pipe 18, the outlet end of the secondary supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user. After the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return pipe 17, and the outlet end of the secondary return pipe 17, and also enters the primary return pipe. After being mixed with the chilled water entering the primary return pipe through the outlet end of the confluence three-way regulating valve 10, it successively passes through the outlet end of the primary return pipe, the suction end of the primary water pump 9, the outlet end of the primary water pump 9, and the inlet end of the water side of the second heat exchanger 4, and returns to the outlet end of the water side of the second heat exchanger 4 again. Thus, one cycle of the water system is completed.

[0093] As the chilled water in the second energy storage water tank 22 of the energy storage device 16 is gradually cooled, the opening degree of the bypass inlet end 12 of the confluence three-way regulating valve 10 becomes smaller and smaller until it is completely closed; while the opening degree of the direct flow inlet end 15 of the confluence three-way regulating valve 10 becomes larger and larger until it is completely opened. Thus, the overall water temperature reduction stage of the energy storage device 16 ends. Figure 2 The shown heat pump device enters the third stage of operation, that is, the stable operation stage of the water system.

[0094] 3) Stable operation stage of the water system

[0095] During the operation of this stage, the flow control valve 23 is fully open; the primary water pump 9 and the secondary water pump 13 are both operating normally. The direct flow inlet end 15 of the confluence three-way regulating valve 10 is fully open, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is closed.

[0096] If the compression mechanism 1 is a variable-frequency compressor, during operation, the compression mechanism 1 regulates the operating frequency of the compressor according to the chilled water temperature at the water-side outlet of the second heat exchanger 4; that is, during operation, by regulating the operating frequency of the compressor, the chilled water temperature at the water-side outlet of the second heat exchanger 4 is maintained at the desired value. If the compression mechanism 1 is a fixed-frequency compressor, during operation, the compression mechanism 1 adopts the operating mode of starting and stopping the compressor according to the change of the chilled water temperature at the water-side outlet of the second heat exchanger 4 to maintain the chilled water temperature at the water-side outlet of the second heat exchanger 4 within the desired range.

[0097] The working process of the water system is as follows: The chilled water coming out from the water-side outlet of the second heat exchanger 4 successively passes through the inlet end of the primary water supply pipe, the outlet end of the primary water supply pipe, the inlet end of the flow control valve 23, the outlet end of the flow control valve 23, and enters the first energy storage water tank 21 of the energy storage device 16 and is divided into two parts; the first part of the chilled water, under the action of the water pressure difference, makes the relatively warmer chilled water in the second energy storage water tank 22 pass through the direct current inlet end 15 of the combined three-way regulating valve 10, the outlet end of the combined three-way regulating valve 10, and the inlet end of the primary return water pipe in sequence through the connecting pipe 19, and enters the primary return water pipe;

[0098] The second part of the chilled water entering the first energy storage water tank 21 of the energy storage device 16 successively passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; after the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and also enters the primary return water pipe; after being mixed with the chilled water entering the primary return water pipe through the outlet end of the combined three-way regulating valve 10, it successively passes through the outlet end of the primary return water pipe, the suction end of the primary water pump 9, the outlet end of the primary water pump 9, and the water-side inlet end of the second heat exchanger 4, and returns to the water-side outlet end of the second heat exchanger 4 again; thus, a cycle of the water system is completed.

[0099] 4) Chilled water storage operation stage

[0100] During the operation of this stage, the flow control valve 23 is closed; the compression mechanism 1 and the primary water pump 9 do not work; the secondary water pump 13 works normally. The opening degree of the combined three-way regulating valve 10 can be in any state. At this time, during the peak electricity period, the chilled water stored in the first energy storage water tank 21 and the second energy storage water tank 22 is used to supply cooling to the user.

[0101] The working process of the water system is as follows: The chilled water in the first energy storage water tank 21 of the energy storage device 16 is successively sucked through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; after the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and enters the primary return water pipe; then it successively passes through the inlet end of the check valve 20, the outlet end of the check valve 20, the second energy storage water tank 22, and the connecting pipe 19, and returns to the first energy storage water tank 21 of the energy storage device 16 again, thus completing one cycle of the water system.

[0102] Figure 2 In the water system of the heat pump device shown, the inlet end of the secondary water supply pipe 18 is connected to the first energy storage water tank 21 of the energy storage device 16 successively through the outlet end of the secondary water pump 13 and the suction end of the secondary water pump 13; when the secondary water pump 13 is arranged at the outlet end of the secondary return water pipe 17, the inlet end of the secondary water supply pipe 18 is directly connected to the first energy storage water tank 21 of the energy storage device 16; usually, it is connected to the upper space of the first energy storage water tank 21. The disadvantages of the above two schemes are: in the stage of rapid cooling of the water temperature in the secondary pipe network, part of the water in the first energy storage water tank 21 will participate in the circulation of the water system, so to a certain extent, it will prolong the time for the chilled water temperature to rapidly cool down to meet the normal use requirements. In actual application, there are the following two further improvement schemes.

[0103] When the secondary water pump 13 is arranged at the inlet end of the secondary water supply pipe 18, the connection method of the first improvement scheme is: the inlet end of the secondary water supply pipe 18 is successively connected to the pipe between the outlet end of the flow control valve 23 and the first energy storage water tank 21 through the outlet end of the secondary water pump 13 and the suction end of the secondary water pump 13.

[0104] When the secondary water pump 13 is arranged at the outlet end of the secondary return water pipe 17, the connection method of the second improvement scheme is: the inlet end of the secondary water supply pipe 18 is directly connected to the pipe between the outlet end of the flow control valve 23 and the first energy storage water tank 21.

[0105] The above two improvement schemes can avoid the water in the energy storage device 16 from participating in the circulation of the water system in the stage of rapid cooling of the water temperature in the secondary pipe network, and can shorten the time for the chilled water temperature to rapidly cool down to meet the normal use requirements.

[0106] The above two improvement schemes are also applicable to the heat pump device schemes described in Embodiment 5 and Embodiment 6.

[0107] For Figure 2 The energy storage device 16 of the heat pump device shown can also adopt Figure 1 The energy storage device 16 in the scheme shown, that is: the energy storage device 16 is a single energy storage water tank. At this time, there are the following four connection methods of the energy storage device 16 in the system.

[0108] 1) When the secondary water pump 13 is provided at the inlet end of the secondary water supply pipe 18, Connection Method 1:

[0109] The outlet end of the flow control valve 23 is connected to the energy storage device 16; the inlet end of the secondary water supply pipe 18 is sequentially connected to the energy storage device 16 through the outlet end and the suction end of the secondary water pump 13; the energy storage device 16 is simultaneously connected to the DC inlet end 15 of the combined three-way regulating valve 10 and the outlet end of the check valve 20.

[0110] 2) When the secondary water pump 13 is provided at the outlet end of the secondary water return pipe 17, Connection Method 2:

[0111] The outlet end of the flow control valve 23 is connected to the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the energy storage device 16: the energy storage device 16 is simultaneously connected to the DC inlet end 15 of the combined three-way regulating valve 10 and the outlet end of the check valve 20.

[0112] 3) When the secondary water pump 13 is provided at the inlet end of the secondary water supply pipe 18, Connection Method 3:

[0113] The outlet end of the flow control valve 23 is connected to the energy storage device 16; the inlet end of the secondary water supply pipe 18 is sequentially connected to the pipe between the outlet end of the flow control valve 23 and the energy storage device 16 through the outlet end and the suction end of the secondary water pump 13; the energy storage device 16 is simultaneously connected to the DC inlet end 15 of the combined three-way regulating valve 10 and the outlet end of the check valve 20.

[0114] 4) When the secondary water pump 13 is provided at the outlet end of the secondary water return pipe 17, Connection Method 4:

[0115] The outlet end of the flow control valve 23 is connected to the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the pipe between the outlet end of the flow control valve 23 and the energy storage device 16; the energy storage device 16 is simultaneously connected to the DC inlet end 15 of the combined three-way regulating valve 10 and the outlet end of the check valve 20.

[0116] The above four connection schemes are also applicable to the heat pump equipment schemes described in Embodiment 5 and Embodiment 6.

[0117] Embodiment 3

[0118] As Figure 3 shown, this embodiment is a heat pump equipment for producing air-conditioning chilled and hot water; it is the same as Figure 1The difference of the shown heat pump device is that a four-way valve 70 is added to the refrigerant system of the heat pump device. The connection mode of the four-way valve 70 in the system is as follows: the high-pressure node 71 of the four-way valve 70 is connected to the outlet end of the compression mechanism 1, the low-pressure node 73 of the four-way valve 70 is connected to the inlet end of the compression mechanism 1, and any one of the two reversing nodes of the four-way valve 70, the reversing node 72, is sequentially connected to the other reversing node 74 of the four-way valve 70 through the first heat exchanger 3, the throttling mechanism 5, and the second heat exchanger 4.

[0119] The function of the four-way valve 70 in the system is to switch the flow direction of the refrigerant to realize the switching between the refrigeration condition and the heating condition.

[0120] The throttling mechanism 5 is an electronic expansion valve. The combined flow three-way regulating valve 10 is an electric three-way regulating valve.

[0121] When working under the refrigeration condition, the second heat exchanger 4 is an evaporator for producing chilled water for air conditioning; the first heat exchanger 3 is a condenser for dissipating the condensation heat generated by refrigeration to the environment (outdoor air, water, soil, etc.). When working under the heating condition, the second heat exchanger 4 is a condenser for producing hot water for air conditioning: the first heat exchanger 3 is an evaporator for absorbing heat from the environment (outdoor air, water, soil, etc.).

[0122] This heat pump device is divided into two parts: a refrigerant system and a water system; their working processes are described as follows respectively.

[0123] (1) Working process of the refrigerant system

[0124] 1) The working process of the refrigerant under the refrigeration condition is: after the refrigerant is discharged from the outlet end of the compression mechanism 1, it sequentially passes through the high-pressure node 71 of the four-way valve 70, the reversing node 72 of the four-way valve 70, the first heat exchanger 3, the throttling mechanism 5, the second heat exchanger 4, the reversing node 74 of the four-way valve 70, and the low-pressure node 73 of the four-way valve 70, and then returns to the inlet end of the compression mechanism 1 and enters the compression mechanism 1 to be recompressed. Thus, a refrigeration condition cycle is completed.

[0125] 2) The working process of the refrigerant under the heating condition is: after the refrigerant is discharged from the outlet end of the compression mechanism 1, it sequentially passes through the high-pressure node 71 of the four-way valve 70, the reversing node 74 of the four-way valve 70, the second heat exchanger 4, the throttling mechanism 5, the first heat exchanger 3, the reversing node 72 of the four-way valve 70, and the low-pressure node 73 of the four-way valve 70, and then returns to the inlet end of the compression mechanism 1 and enters the compression mechanism 1 to be recompressed. Thus, a heating condition cycle is completed.

[0126] (2) Working process of the water system

[0127] The water system of this heat pump device is also a secondary pump system. The primary pipe network consists of the second heat exchanger 4, the primary water pump 9, the confluence three-way regulating valve 10, the energy storage device 16, the primary water supply pipe and the primary water return pipe. The secondary pipe network consists of the secondary water pump 13, the user terminal 14, the energy storage device 16, the secondary water supply pipe 18 and the secondary water return pipe 17.

[0128] Figure 3 During the operation of the water system of the shown heat pump device in the refrigeration condition, according to the time sequence of starting and running, it is also divided into three stages: the rapid cooling of the water temperature in the secondary pipe network, the overall reduction of the water temperature in the energy storage device 16, and the stable operation of the water system. The working processes of the water system in the above three stages are the same as those in Embodiment 1. Figure 3 During the operation of the water system of the shown heat pump device in the heating condition, according to the time sequence of starting and running, it is divided into three stages: the rapid heating of the water temperature in the secondary pipe network, the overall increase of the water temperature in the energy storage device 16, and the stable operation of the water system. The working processes of the water system in the above three stages are described as follows respectively.

[0129] 1) The stage of rapid heating of the water temperature in the secondary pipe network

[0130] This stage appears Figure 3 at the beginning of each start of the heating condition of the shown heat pump device. At this time, the water temperature in the entire water system is relatively low. After the hot water enters the second heat exchanger 4 and exchanges heat with the refrigerant once and is heated, the water temperature coming out of the second heat exchanger 4 still cannot reach the normal use requirement of the user terminal 14. Therefore, in order to quickly increase the water temperature of the hot water sent to the user terminal 14 to reach the normal use requirement, shorten the waiting time of the user, and improve the user experience; so the water system needs to use the operation of this stage.

[0131] During the operation of this stage, the direct current inlet end 15 of the confluence three-way regulating valve 10 is closed; the bypass inlet end 12 of the confluence three-way regulating valve 10 is fully opened. The primary water pump 9 and the secondary water pump 13 are both working normally.

[0132] The working process of the water system in this stage is the same as that of the stage of rapid cooling of the water temperature in the secondary pipe network of the refrigeration condition of this embodiment, that is: the same as the working process of the stage of rapid cooling of the water temperature in the secondary pipe network of Embodiment 1. The difference is that: in the heating condition, the hot water circulates in the water system; in the user terminal 14, the hot water dissipates heat to the user.

[0133] 2) The stage of overall increase of the water temperature in the energy storage device 16

[0134] Figure 3After the heat pump device shown has operated in the heating condition for the first stage, the hot water temperature sent to the user terminal 14 can already reach the normal usage requirements. However, at this time, the hot water temperature in the lower space of the energy storage device 16 is still very low. Therefore, it is necessary to gradually heat the hot water in the lower space of the energy storage device 16 in this stage.

[0135] During the operation of this stage, the primary water pump 9 and the secondary water pump 13 are both operating normally. The direct current inlet end 15 of the combination three-way regulating valve 10 is opened, and the bypass inlet end 12 of the combination three-way regulating valve 10 is also opened. During the working process, the combination three-way regulating valve 10 adjusts the opening degrees of the direct current inlet end 15 and the bypass inlet end 12 of the combination three-way regulating valve 10 according to the hot water temperature at the water side outlet end of the second heat exchanger 4. That is, during operation, by adjusting the opening degree of the combination three-way regulating valve 10, the hot water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the expected value (usually the hot water temperature required by the user terminal 14), and at the same time, the hot water in the lower space of the energy storage device 16 is gradually heated, and it is also ensured that the hot water temperature sent to the user terminal 14 reaches the normal working requirements.

[0136] The working process of the water system in this stage is the same as that of the water system in the overall water temperature reduction stage of the energy storage device 16 in the refrigeration condition of this embodiment, that is, the same as the working process of the water system in the overall water temperature reduction stage of the energy storage device 16 in Embodiment 1. The difference is that in the heating condition, hot water circulates in the water system, and in the user terminal 14, the hot water dissipates heat to the user.

[0137] 3) Stable operation stage of the water system

[0138] When entering the operation of this stage in the heating condition, the primary water pump 9 and the secondary water pump 13 are both operating normally. The direct current inlet end 15 of the combination three-way regulating valve 10 is fully opened, and the bypass inlet end 12 of the combination three-way regulating valve 10 is closed.

[0139] If the compression mechanism 1 is a variable frequency compressor, during the working process, the compression mechanism 1 adjusts the working frequency of the compressor according to the hot water temperature at the water side outlet end of the second heat exchanger 4. That is, during operation, by adjusting the working frequency of the compressor, the hot water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the expected value. If the compression mechanism 1 is a fixed frequency compressor, during the working process, the compression mechanism 1 adopts the working mode of starting and stopping the compressor according to the change of the hot water temperature at the water side outlet end of the second heat exchanger 4 to keep the hot water temperature at the water side outlet end of the second heat exchanger 4 within the expected value range.

[0140] The working process of the water system in this stage is the same as that of the water system in the stable operation stage of the refrigeration condition of this embodiment, that is: the same as the working process of the water system in the stable operation stage of the water system in Embodiment 1. The difference is that: in the heating condition, hot water circulates in the water system; in the user terminal 14, the hot water dissipates heat to the user.

[0141] The working processes of the water system in the rapid heating stage of the secondary pipe network water temperature, the overall water temperature elevation stage of the energy storage device 16, and the stable operation stage of the water system under the heating condition described above are also applicable to the solution described in Embodiment 4 and its variant solutions.

[0142] Embodiment 4

[0143] This embodiment is a variant solution based on the solution shown in Embodiment 1 Figure 1 The only difference from the solution shown in Figure 1 is that: the connection relationship between the compression mechanism 1 and the first heat exchanger 3 and the second heat exchanger 4 has changed; in this embodiment, the connection mode of the refrigerant system of the heat pump device is: the outlet end of the compression mechanism 1 is successively connected to the inlet end of the compression mechanism 1 through the second heat exchanger 4, the throttling mechanism 5, and the first heat exchanger 3. During operation, the second heat exchanger 4 becomes a condenser for producing air-conditioning hot water; the first heat exchanger 3 is an evaporator for absorbing heat from the environment (such as water or soil). Similarly, the throttling mechanism 5 is an electronic expansion valve. The confluence three-way regulating valve 10 is an electric three-way regulating valve.

[0144] This heat pump device is also divided into two parts: a refrigerant system and a water system; their working processes are described as follows respectively.

[0145] (1) Working process of the refrigerant system

[0146] After the refrigerant is discharged from the outlet end of the compression mechanism 1, it successively passes through the second heat exchanger 4, the throttling mechanism 5, and the first heat exchanger 3, and returns to the inlet end of the compression mechanism 1, and enters the compression mechanism 1 to be recompressed, thus completing one cycle.

[0147] (2) Working process of the water system

[0148] The composition and connection mode of the water system of the heat pump device in this embodiment are the same as those of the water system in the solution shown in Embodiment 1 Figure 1 ; its water system is also a secondary pump system. The primary pipe network consists of the second heat exchanger 4, the primary water pump 9, the confluence three-way regulating valve 10, the energy storage device 16, the primary water supply pipe, and the primary water return pipe. The secondary pipe network consists of the secondary water pump 13, the user terminal 14, the energy storage device 16, the secondary water supply pipe 18, and the secondary water return pipe 17.

[0149] During the operation of the water system of the heat pump device in this embodiment, it is divided into three stages in the chronological order of startup and operation: rapid temperature rise of the secondary pipe network water temperature, overall temperature rise of the energy storage device 16, and stable operation of the water system. The working processes of the water system in the above three stages are described as follows respectively.

[0150] 1) Stage of rapid temperature rise of the secondary pipe network water temperature

[0151] During the work of this stage, the direct current inlet end 15 of the confluence three-way regulating valve 10 is closed; the bypass inlet end 12 of the confluence three-way regulating valve 10 is fully opened. The primary water pump 9 and the secondary water pump 13 are both working normally. The working process of the water system in this stage is the same as that of the water system in the stage of rapid temperature rise of the secondary pipe network water temperature in the heating condition of the scheme shown in Embodiment 3 Figure 3 shown.

[0152] 2) Stage of overall temperature rise of the energy storage device 16

[0153] During the work of this stage, the primary water pump 9 and the secondary water pump 13 are both working normally. The direct current inlet end 15 of the confluence three-way regulating valve 10 is opened, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is also opened; during the working process, the confluence three-way regulating valve 10 adjusts the opening degrees of the direct current inlet end 15 of the confluence three-way regulating valve 10 and the bypass inlet end 12 of the confluence three-way regulating valve 10 according to the hot water temperature at the water side outlet end of the second heat exchanger 4; that is: during the work, by adjusting the opening degree of the confluence three-way regulating valve 10, the hot water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the expected value, and at the same time, the hot water in the lower space of the energy storage device 16 is gradually heated, and it is also ensured that the hot water temperature sent to the user terminal 14 meets the normal working requirements.

[0154] The working process of the water system in this stage is the same as that of the water system in the stage of overall temperature rise of the energy storage device 16 in the heating condition of the scheme shown in Embodiment 3 Figure 3 shown.

[0155] 3) Stage of stable operation of the water system

[0156] During the work of this stage, the primary water pump 9 and the secondary water pump 13 are both working normally. The direct current inlet end 15 of the confluence three-way regulating valve 10 is fully opened, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is closed. The working process of the water system in this stage is the same as that of the water system in the stage of stable operation of the water system in the heating condition of the scheme shown in Embodiment 3 Figure 3 shown.

[0157] The above-described solution in this embodiment can be further improved by adding a domestic hot water heating coil in the energy storage device 16; at this time, the inlet end of the domestic hot water heating coil is connected to the tap water pipe, and the outlet end of the domestic hot water heating coil is connected to the end of the hot water faucet and other hot water users; therefore, the improved solution of this embodiment can not only provide air-conditioning hot water for users, but also provide domestic hot water. In actual application, when the hot water temperature at the outlet end of the domestic hot water heating coil does not meet the usage requirements, the hot water at the outlet end of the domestic hot water heating coil can be sent to an auxiliary heat source such as a gas wall-mounted boiler for secondary heating. That is: the outlet end of the domestic hot water heating coil is connected to the water system inlet of the gas wall-mounted boiler.

[0158] The above improvement solution of adding a domestic hot water heating coil in the energy storage device 16 is applicable to all embodiments of the present invention and their variant solutions.

[0159] Embodiment 5

[0160] This embodiment is a variant solution based on the solution shown in Embodiment 2 Figure 2 The only difference from the solution shown in Figure 2 is that the connection relationship between the compression mechanism 1 and the first heat exchanger 3 and the second heat exchanger 4 has changed; in this embodiment, the connection mode of the refrigerant system of the heat pump device is: the outlet end of the compression mechanism 1 is sequentially connected to the inlet end of the compression mechanism 1 through the second heat exchanger 4, the throttling mechanism 5, and the first heat exchanger 3. When working, the second heat exchanger 4 becomes a condenser for producing air-conditioning hot water; the first heat exchanger 3 is an evaporator for absorbing heat from the environment (water or soil, etc.). Similarly, the throttling mechanism 5 is an electronic expansion valve. The confluence three-way regulating valve 10 is an electric three-way regulating valve; the flow control valve 23 is a solenoid valve.

[0161] This heat pump device is also divided into two parts: a refrigerant system and a water system; their working processes are described as follows.

[0162] (1) Working process of the refrigerant system

[0163] After the refrigerant is discharged from the outlet end of the compression mechanism 1, it passes through the second heat exchanger 4, the throttling mechanism 5, and the first heat exchanger 3 in sequence, returns to the inlet end of the compression mechanism 1, and enters the compression mechanism 1 to be recompressed, thus completing one cycle.

[0164] (2) Working process of the water system

[0165] The composition and connection mode of the water system of the heat pump device in this embodiment are the same as those in Embodiment 2 Figure 2The water system of the shown solution is the same; its water system is also a secondary pump system. The primary pipe network consists of a second heat exchanger 4, a primary water pump 9, a confluence three-way regulating valve 10, an energy storage device 16 (including a first energy storage water tank 21, a second energy storage water tank 22, and a connecting pipe 19), a flow control valve 23, a check valve 20, a primary water supply pipe, and a primary water return pipe. The secondary pipe network consists of a secondary water pump 13, user terminals 14, an energy storage device 16 (including a first energy storage water tank 21, a second energy storage water tank 22, and a connecting pipe 19), a secondary water supply pipe 18, and a secondary water return pipe 17.

[0166] During the working process of the water system of the heat pump device in this embodiment, according to the time sequence of starting and running, it is divided into: a stage of rapid temperature rise of the secondary pipe network water temperature, a stage of overall temperature rise of the energy storage device 16, a stage of stable operation of the water system, and a heat storage operation stage. The working processes of the water system in the above four stages are described as follows respectively.

[0167] 1) Stage of rapid temperature rise of the secondary pipe network water temperature

[0168] This stage appears at the beginning of each start of the heat pump device in this embodiment. At this time, the water temperature in the entire water system is relatively low. After the hot water enters the second heat exchanger 4 and exchanges heat with the refrigerant for the first time and is heated, the water temperature coming out of the second heat exchanger 4 still cannot reach the normal use requirements of the user terminal 14; therefore, in order to quickly raise the water temperature of the hot water sent to the user terminal 14 to reach the normal use requirements, shorten the waiting time of the user, and improve the user experience; so the water system needs to use the operation of this stage.

[0169] During the work of this stage, the direct current inlet end 15 of the confluence three-way regulating valve 10 is closed; the bypass inlet end 12 of the confluence three-way regulating valve 10 is fully opened. The primary water pump 9 and the secondary water pump 13 both work normally. The flow control valve 23 is fully opened.

[0170] The working process of the water system in this stage is the same as that of the stage of rapid temperature drop of the secondary pipe network water temperature in the solution shown in Embodiment 2 Figure 2 The difference is that in this embodiment, the hot water circulates in the water system; in the user terminal 14, the hot water dissipates heat to the user.

[0171] 2) Stage of overall temperature rise of the energy storage device 16

[0172] After the heat pump device in this embodiment has passed through the first stage of operation, the water temperature of the hot water sent to the user terminal 14 can already reach the normal use requirements, but at this time, the water temperature of the hot water in the second energy storage water tank 22 of the energy storage device 16 is still very low; therefore, it is necessary to gradually heat the hot water in the second energy storage water tank 22 by using this stage.

[0173] During the work of this stage, the flow control valve 23 is fully open; the primary water pump 9 and the secondary water pump 13 are both working normally. The direct current inlet end 15 of the confluence three-way regulating valve 10 is open, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is also open; during the working process, the confluence three-way regulating valve 10 adjusts the opening degrees of the direct current inlet end 15 of the confluence three-way regulating valve 10 and the bypass inlet end 12 of the confluence three-way regulating valve 10 according to the hot water temperature at the water side outlet end of the second heat exchanger 4; that is: during the work, by adjusting the opening degree of the confluence three-way regulating valve 10, the hot water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the expected value, and at the same time, the hot water in the second energy storage water tank 22 is gradually heated, and it is also ensured that the hot water temperature sent to the user terminal 14 meets the normal working requirements.

[0174] The working process of the water system in this stage is the same as that of the energy storage device 16 in the overall water temperature reduction stage of the scheme shown in Embodiment 2. Figure 2 The difference is that: in this embodiment, hot water circulates in the water system; in the user terminal 14, the hot water dissipates heat to the user.

[0175] 3) Stable operation stage of the water system

[0176] During the work of this stage, the flow control valve 23 is fully open; the primary water pump 9 and the secondary water pump 13 are both working normally. The direct current inlet end 15 of the confluence three-way regulating valve 10 is fully open, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is closed.

[0177] If the compression mechanism 1 is a variable frequency compressor, then during the working process, the compression mechanism 1 adjusts the working frequency of the compressor according to the hot water temperature at the water side outlet end of the second heat exchanger 4; that is: during the work, by adjusting the working frequency of the compressor, the hot water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the expected value. If the compression mechanism 1 is a fixed frequency compressor, then during the working process, the compression mechanism 1 adopts the working mode of starting and stopping the compressor according to the change of the hot water temperature at the water side outlet end of the second heat exchanger 4 to keep the hot water temperature at the water side outlet end of the second heat exchanger 4 within the expected value range.

[0178] The working process of the water system in this stage is the same as that of the stable operation stage of the water system in the scheme shown in Embodiment 2. Figure 2 The difference is that: in the water system of this embodiment, hot water circulates; in the user terminal 14, the hot water dissipates heat to the user.

[0179] 4) Heat storage operation stage

[0180] During the work of this stage, the flow control valve 23 is closed; the compression mechanism 1 and the primary water pump 9 do not work; the secondary water pump 13 works normally. The opening degree of the confluence three-way regulating valve 10 can be in any state. At this time, during the peak power period, the heat stored in the first energy storage water tank 21 and the second energy storage water tank 22 is used to heat the users.

[0181] The working process of the water system in this stage is as follows: The hot water in the first energy storage water tank 21 of the energy storage device 16 is successively inhaled through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to heat the user; after the hot water releases heat and the water temperature drops, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return pipe 17, and the outlet end of the secondary return pipe 17, and enters the primary return pipe; then it successively passes through the inlet end of the check valve 20, the outlet end of the check valve 20, the second energy storage water tank 22, and the connecting pipe 19, and returns to the first energy storage water tank 21 of the energy storage device 16 again, thus completing a cycle of the water system.

[0182] The above-mentioned solution in this embodiment can be further improved by adding a domestic hot water heating coil in the first energy storage water tank 21 or the second energy storage water tank 22 of the energy storage device 16; at this time, the inlet end of the domestic hot water heating coil is connected to the tap water pipe, and the outlet end of the domestic hot water heating coil is connected to the end of the hot water tap and other hot water users; therefore, the improved solution in this embodiment can not only provide air-conditioning hot water for users, but also provide domestic hot water. In actual application, when the hot water temperature at the outlet end of the domestic hot water heating coil does not meet the use requirements, the hot water at the outlet end of the domestic hot water heating coil can be sent to an auxiliary heat source such as a gas wall-mounted boiler for secondary heating. That is: the outlet end of the domestic hot water heating coil is connected to the water inlet of the gas wall-mounted boiler.

[0183] In actual application, domestic hot water heating coils can also be added to both the first energy storage water tank 21 and the second energy storage water tank 22 at the same time; at this time, the connection method of the domestic hot water heating coil is: the inlet end of the domestic hot water heating coil of the second energy storage water tank 22 is connected to the tap water pipe, and the outlet end of the domestic hot water heating coil of the second energy storage water tank 22 successively passes through the inlet end of the domestic hot water heating coil of the first energy storage water tank 21, the outlet end of the domestic hot water heating coil of the first energy storage water tank 21, and is connected to the end of the hot water tap and other hot water users, or is connected to the end of the hot water tap and other hot water users through an auxiliary heat source such as a gas wall-mounted boiler.

[0184] The above improvement solutions of adding a domestic hot water heating coil in the first energy storage water tank 21 or the second energy storage water tank 22 of the energy storage device 16, and the improvement solution of adding domestic hot water heating coils to both the first energy storage water tank 21 and the second energy storage water tank 22 at the same time are applicable to all embodiments of the energy storage device 16 of the present invention that are at least composed of the first energy storage water tank 21 and the second energy storage water tank 22 and their variant solutions.

[0185] Embodiment 6

[0186] This embodiment is a variant solution based on the solution shown in Embodiment 2 Figure 2 and is different from Figure 2The difference between the presented solution is as follows: A four-way valve 70 is added to the refrigerant system of the heat pump device. The connection method of the four-way valve 70 in the system is: The high-pressure node 71 of the four-way valve 70 is connected to the outlet end of the compression mechanism 1, the low-pressure node 73 of the four-way valve 70 is connected to the inlet end of the compression mechanism 1, and any one of the two commutation nodes of the four-way valve 70, i.e., the commutation node 72, is sequentially connected to the other commutation node 74 of the four-way valve 70 through the first heat exchanger 3, the throttling mechanism 5, and the second heat exchanger 4.

[0187] The function of the four-way valve 70 in the system is to switch the flow direction of the refrigerant, thereby realizing the switching between the refrigeration mode and the heating mode.

[0188] The throttling mechanism 5 is an electronic expansion valve. The confluence three-way regulating valve 10 is an electric three-way regulating valve. When operating in the refrigeration mode, the second heat exchanger 4 is an evaporator for producing chilled water for air conditioning; the first heat exchanger 3 is a condenser that dissipates the condensation heat generated by refrigeration to the environment (outdoor air, water, soil, etc.).

[0189] When operating in the heating mode, the second heat exchanger 4 is a condenser for producing hot water for air conditioning; the first heat exchanger 3 is an evaporator that absorbs heat from the environment (outdoor air, water, soil, etc.).

[0190] This heat pump device is divided into two parts: a refrigerant system and a water system; their working processes are described as follows.

[0191] (1) Working process of the refrigerant system

[0192] 1) The refrigerant working process under the refrigeration mode is the same as that in the solution shown in Embodiment 3. Figure 3 2) The refrigerant working process under the heating mode is the same as that in the solution shown in Embodiment 3. Figure 3 under the heating mode.

[0193] (2) Working process of the water system

[0194] The composition and connection method of the water system of the heat pump device in this embodiment are the same as those of the water system in the solution shown in Embodiment 2. Figure 2 It is also a secondary pump system. The primary pipe network consists of the second heat exchanger 4, the primary water pump 9, the confluence three-way regulating valve 10, the energy storage device 16 (including the first energy storage water tank 21, the second energy storage water tank 22, and the connecting pipe 19), the flow control valve 23, the check valve 20, the primary water supply pipe, and the primary water return pipe. The secondary pipe network consists of the secondary water pump 13, the user terminal 14, the energy storage device 16 (including the first energy storage water tank 21, the second energy storage water tank 22, and the connecting pipe 19), the secondary water supply pipe 18, and the secondary water return pipe 17.

[0195] During the operation of the water system of the heat pump device in the refrigeration condition of this embodiment, according to the time sequence of startup and operation, it is divided into: the rapid cooling of the secondary pipe network water temperature, the overall water temperature reduction of the energy storage device 16, and the three stages of stable operation of the water system, and there is also a chilled water storage operation stage. The working processes of the water system in the above four stages are respectively the same as those of the water system in the corresponding stages of the solution shown in Embodiment 2 Figure 2 and are the same as the working processes of the water system in the corresponding stages of the solution shown in Embodiment 2

[0196] During the operation of the water system of the heat pump device in this embodiment under the heating condition, according to the time sequence of startup and operation, it is divided into: the rapid heating of the secondary pipe network water temperature, the overall water temperature increase of the energy storage device 16, and the three stages of stable operation of the water system, and there is also a heat storage operation stage, a winter defrosting operation stage, and a winter anti-freezing operation stage. Among them, the working processes of the four stages of rapid heating of the secondary pipe network water temperature, overall water temperature increase of the energy storage device 16, stable operation of the water system, and heat storage operation are respectively the same as those of the water system in the corresponding stages of the heat pump device described in Embodiment 5; while in the winter defrosting operation stage and the winter anti-freezing operation stage, the working processes of the water system are described as follows

[0197] 1) Winter defrosting operation stage

[0198] During the operation of this stage, the refrigerant system of the heat pump device in this embodiment needs to be switched to the refrigeration condition; therefore, the second heat exchanger 4 becomes an evaporator and absorbs heat from the hot water, while the first heat exchanger 3 becomes a condenser and uses the heat absorbed by the second heat exchanger 4 from the hot water for defrosting. In order to avoid the adverse impact on the normal heating of the heat pump device caused by the decrease in the hot water temperature during winter defrosting, the heat pump device in this embodiment needs to enter this operation stage

[0199] During operation, the flow control valve 23 is closed; the direct current inlet end 15 of the confluence three-way regulating valve 10 is closed, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is fully opened. The primary water pump 9 and the secondary water pump 13 are both working normally

[0200] During this operation stage, the working process of the refrigerant system of this heat pump device is the same as that of the refrigerant working process under the refrigeration condition of the solution shown in Embodiment 3 Figure 3 and is the same as the refrigerant working process under the refrigeration condition of the solution shown in Embodiment 3. The working process of its water system is described as follows

[0201] After the hot water is pressed out from the outlet end of the primary water pump 9, it enters the second heat exchanger 4 through the water side inlet end of the second heat exchanger 4 for heat exchange with the refrigerant. After the hot water releases heat and is cooled, it passes through the water side outlet end of the second heat exchanger 4, the inlet end of the primary supply pipe, the bypass inlet end 12 of the confluence three-way regulating valve 10, the outlet end of the confluence three-way regulating valve 10, and the inlet end of the primary return pipe in sequence and enters the primary return pipe

[0202] The hot water in the first energy storage water tank 21 of the energy storage device 16 sequentially passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to heat the user; after the hot water releases heat and the water temperature drops, it sequentially passes through the outlet of the user terminal 14, the inlet end of the secondary return pipe 17, and the outlet end of the secondary return pipe 17, and also enters the primary return pipe; after being mixed with the hot water entering the primary return pipe through the inlet end of the primary return pipe, it is divided into two paths; the first path of hot water sequentially passes through the outlet end of the primary return pipe and the suction end of the primary water pump 9, and enters the primary water pump 9 again to be pressurized; the second path of hot water sequentially passes through the inlet end of the check valve 20, the outlet end of the check valve 20, the second energy storage water tank 22, and the connecting pipe 19, and returns to the first energy storage water tank 21 of the energy storage device 16 again, thus completing a cycle of the water system once.

[0203] 6) Winter anti-freezing operation stage

[0204] For the heat pump device described in this embodiment, when used in cold climate areas, in winter, when the compression mechanism 1 temporarily stops operating, since the second heat exchanger 4 is a refrigerant-water heat exchanger and there is hot water inside it, if this hot water does not flow, due to the heat dissipation on the surface of the second heat exchanger 4, the water inside the second heat exchanger 4 will freeze and damage the second heat exchanger 4. Therefore, in this case, it is necessary to ensure that there is hot water circulating flow in the second heat exchanger 4.

[0205] When the heat pump device described in this embodiment works in the winter anti-freezing operation stage, the flow control valve 23 is closed; the direct current inlet end 15 of the confluence three-way regulating valve 10 is closed, and the bypass inlet end 12 of the confluence three-way regulating valve 10 is fully open; the primary water pump 9 and the secondary water pump 13 both work normally; the compression mechanism 1 does not work, and the refrigerant system of the heat pump device is still in the heating working condition, that is: the second heat exchanger 4 is a condenser, and the first heat exchanger 3 is an evaporator.

[0206] The working process of the water system of the heat pump device in the winter anti-freezing operation stage is as follows: After the hot water is pumped out from the outlet end of the primary water pump 9, it successively passes through the water-side inlet end of the second heat exchanger 4, the water-side outlet end of the second heat exchanger 4, the inlet end of the primary supply water pipe, the bypass inlet end 12 of the confluence three-way regulating valve 10, the outlet end of the confluence three-way regulating valve 10, and the inlet end of the primary return water pipe and enters the primary return water pipe; The hot water in the first energy storage water tank 21 of the energy storage device 16 successively passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply water pipe 18, the outlet end of the secondary supply water pipe 18, and the inlet of the user terminal 14 and enters the user terminal 14 to heat the user; After the hot water releases heat and the water temperature drops, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17 and also enters the primary return water pipe; After being mixed with the hot water entering the primary return water pipe through the inlet end of the primary return water pipe, it is divided into two paths; The first path of hot water successively passes through the outlet end of the primary return water pipe and the suction end of the primary water pump 9 and enters the primary water pump 9 again to be pressurized; The second path of hot water successively passes through the inlet end of the check valve 20, the outlet end of the check valve 20, the second energy storage water tank 22, and the connecting pipe 19 and returns to the first energy storage water tank 21 of the energy storage device 16 again, thus completing the water system cycle of one winter anti-freezing operation stage.

[0207] From the above working process of the water system of the heat pump device in the winter anti-freezing operation stage, it can be seen that: During the hot water circulation process of the water system, the heat stored in the first energy storage water tank 21 and the second energy storage water tank 22 of the energy storage device 16 is utilized to maintain the normal heating of the user terminal 14, and at the same time, it is ensured that there is hot water circulating in the second heat exchanger 4; At the same time, it also avoids the mixing water loss in the first energy storage water tank 21 and the second energy storage water tank 22 of the energy storage device 16 caused by the anti-freezing of the second heat exchanger 4, and will not have an adverse impact on the hot water temperature sent to the user terminal 14.

[0208] Embodiment 7

[0209] As Figure 6 shown, this embodiment is also a heat pump device for producing air-conditioning chilled water. The whole device includes the following components: a compression mechanism 1, a throttling mechanism 5, a first heat exchanger 3, a second heat exchanger 4, a user terminal 14, an energy storage device 16, a shunt three-way regulating valve 11, a primary water pump 9, and a secondary water pump 13. The throttling mechanism 5 is an electronic expansion valve. The shunt three-way regulating valve 11 is also an electric three-way regulating valve. When working, the second heat exchanger 4 is an evaporator for producing air-conditioning chilled water; The first heat exchanger 3 is a condenser that dissipates the condensation heat generated by refrigeration to the environment (such as water or soil, etc.).

[0210] This heat pump device is divided into two parts: a refrigerant system and a water system; Their working processes are described as follows respectively.

[0211] (1) The working process of the refrigerant system in this embodiment is the same as that in Embodiment 1Figure 1 The refrigerant systems of the shown heat pump devices are the same.

[0212] (2) Working process of the water system in this embodiment

[0213] The water system of the heat pump device in this embodiment is a secondary pump system. The primary pipe network consists of the second heat exchanger 4, the primary water pump 9, the diverting three-way regulating valve 11, the energy storage device 16, the primary water supply pipe and the primary water return pipe. The secondary pipe network consists of the secondary water pump 13, the user terminal 14, the energy storage device 16, the secondary water supply pipe 18 and the secondary water return pipe 17.

[0214] Figure 6 During the working process of the shown heat pump device's water system, according to the chronological order of starting and running, it is divided into three stages: rapid cooling of the water temperature in the secondary pipe network, overall cooling of the water temperature in the energy storage device 16, and stable operation of the water system, and there is also a chilled water operation stage. The working processes of the water system in the above four stages are described as follows.

[0215] 1) Stage of rapid cooling of the water temperature in the secondary pipe network

[0216] This stage appears Figure 6 at the beginning of each start of the shown heat pump device. At this time, the water temperature in the entire water system is relatively high. After the chilled water enters the second heat exchanger 4 and exchanges heat with the refrigerant once and is cooled, the water temperature coming out of the second heat exchanger 4 still cannot meet the normal use requirements of the user terminal 14; therefore, in order to quickly cool the water temperature of the chilled water sent to the user terminal 14, meet the normal use requirements, shorten the waiting time of the user, and improve the user experience; so the water system needs to use the operation of this stage.

[0217] During the work of this stage, the primary water pump 9 and the secondary water pump 13 both work normally. The direct current outlet end 24 of the diverting three-way regulating valve 11 is opened, and the bypass outlet end 25 of the diverting three-way regulating valve 11 is also opened; the opening degree of the direct current outlet end 24 of the diverting three-way regulating valve 11 is just such that the water flow rate passing through the direct current outlet end 24 of the diverting three-way regulating valve 11 is equal to the circulating water flow rate of the secondary network. Therefore, during the working process of this stage, it is possible to prevent the chilled water with a relatively high temperature at the lower part of the energy storage device 16 from entering the suction end of the primary water pump 9, so as to quickly cool the water temperature of the chilled water sent to the user terminal 14 and meet the normal use requirements.

[0218] The working process of the water system is as follows: After the chilled water is pumped out from the outlet end of the primary water pump 9, it enters the second heat exchanger 4 through the water-side inlet end of the second heat exchanger 4 and exchanges heat with the refrigerant. After the chilled water releases heat and is cooled down, it passes through the water-side outlet end of the second heat exchanger 4, the inlet end of the primary supply water pipe, the outlet end of the primary supply water pipe, and the inlet end of the flow-dividing three-way regulating valve 11 in sequence, and enters the flow-dividing three-way regulating valve 11 and is divided into two paths; the first path enters the primary return water pipe through the bypass outlet end 25 of the flow-dividing three-way regulating valve 11; the second path passes through the direct-current outlet end 24 of the flow-dividing three-way regulating valve 11, the energy storage device 16, the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply water pipe 18, the outlet end of the secondary supply water pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; after the chilled water absorbs heat and the water temperature rises, it passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17 in sequence, and also enters the primary return water pipe; after the two paths of chilled water are mixed in the primary return water pipe, they pass through the outlet end of the primary return water pipe and the suction end of the primary water pump 9 in sequence, and enter the primary water pump 9 to be pressurized again, thus completing a cycle of the primary water system.

[0219] At this stage, since the direct-current outlet end 24 of the flow-dividing three-way regulating valve 11 is usually connected to the upper space of the energy storage device 16, and the suction end of the secondary water pump 13 is also connected to the upper space of the energy storage device 16, therefore, during the working process of this stage, the chilled water in the lower space of the energy storage device 16 will not enter the working cycle of the water system. Therefore, the chilled water sent to the user terminal 14 can have its water temperature quickly reduced.

[0220] 2) Stage of overall water temperature reduction of the energy storage device 16

[0221] Figure 6 After the heat pump equipment shown has operated in the first stage, the water temperature of the chilled water sent to the user terminal 14 has gradually decreased, but at this time, the water temperature of the chilled water in the lower space of the energy storage device 16 is still very high; therefore, it is necessary to gradually cool the chilled water in the lower space of the energy storage device 16 in this stage. During the operation of this stage, the primary water pump 9 and the secondary water pump 13 both work normally. The opening of the direct-current outlet end 24 of the flow-dividing three-way regulating valve 11 is gradually increased, while the opening of the bypass outlet end 25 of the flow-dividing three-way regulating valve 11 is gradually decreased; that is: during the working process, the flow-dividing three-way regulating valve 11 regulates the direct-current outlet end 24 of the flow-dividing three-way regulating valve 11 and the opening of the bypass outlet end 25 of the flow-dividing three-way regulating valve 11 according to the water temperature of the chilled water at the water-side outlet end of the second heat exchanger 4; by regulating the opening of the flow-dividing three-way regulating valve 11, the water temperature of the chilled water at the water-side outlet end of the second heat exchanger 4 is maintained at the desired value (usually the required value for the use of the user terminal 14), while gradually cooling the chilled water in the lower space of the energy storage device 16, and also ensuring that the water temperature of the chilled water sent to the user terminal 14 meets the normal working requirements.

[0222] The working process of the water system is as follows: The chilled water coming out from the outlet end of the water side of the second heat exchanger 4 successively passes through the inlet end of the primary supply water pipe, the outlet end of the supply water pipe, and the inlet end of the diverting three-way regulating valve 11, and enters the diverting three-way regulating valve 11 where it is divided into two paths; the first path enters the primary return water pipe through the bypass outlet end 25 of the diverting three-way regulating valve 11; the second path enters the energy storage device 16 through the direct current outlet end 24 of the diverting three-way regulating valve 11 and is further divided into two parts; the first part of the chilled water with a lower temperature, under the action of the water pressure difference, causes the chilled water with a higher temperature in the lower space of the energy storage device 16 to also enter the primary return water pipe through the inlet end of the primary return water pipe; the other part of the chilled water with a lower temperature entering the energy storage device 16 successively passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply water pipe 18, the outlet end of the secondary supply water pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to provide cooling for the user; after the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and also enters the primary return water pipe;

[0223] After the above three parts of the chilled water entering the primary return water pipe are mixed in the primary return water pipe, they successively pass through the outlet end of the primary return water pipe, the suction end of the primary water pump 9, the outlet end of the primary water pump 9, and the inlet end of the water side of the second heat exchanger 4, and return to the outlet end of the water side of the second heat exchanger 4 again; thus, the cycle of the primary water system is completed.

[0224] As the chilled water in the lower space of the energy storage device 16 is gradually cooled, the opening degree of the bypass outlet end 25 of the diverting three-way regulating valve 11 becomes smaller and smaller until it is completely closed; while the opening degree of the direct current outlet end 24 of the diverting three-way regulating valve 11 becomes larger and larger until it is completely opened; thus, the stage of overall water temperature reduction of the energy storage device 16 ends, Figure 6 The shown heat pump equipment enters the third stage of operation, that is: the stable operation stage of the water system.

[0225] 3) Stable operation stage of the water system

[0226] During the work of this stage, the primary water pump 9 and the secondary water pump 13 both work normally. The direct current outlet end 24 of the diverting three-way regulating valve 11 is fully open, and the bypass outlet end 25 of the diverting three-way regulating valve 11 is closed.

[0227] If the compression mechanism 1 is a variable-frequency compressor, during the working process, the compression mechanism 1 regulates the working frequency of the compressor according to the water temperature of the chilled water at the outlet end of the water side of the second heat exchanger 4; that is: during the work, by regulating the working frequency of the compressor, the water temperature of the chilled water at the outlet end of the water side of the second heat exchanger 4 is maintained at the expected value. If the compression mechanism 1 is a fixed-frequency compressor, during the working process, the compression mechanism 1 adopts the working mode of starting and stopping the compressor according to the change of the water temperature of the chilled water at the outlet end of the water side of the second heat exchanger 4 to maintain the water temperature of the chilled water at the outlet end of the water side of the second heat exchanger 4 within the expected value range.

[0228] The working process of the water system is as follows: The chilled water coming out from the outlet end of the water side of the second heat exchanger 4 successively passes through the inlet end of the primary supply water pipe, the outlet end of the primary supply water pipe, the inlet end of the diverting three-way regulating valve 11, and the direct current outlet end 24 of the diverting three-way regulating valve 11, and enters the energy storage device 16 where it is divided into two parts; The first part of the chilled water, under the action of the water pressure difference, makes the chilled water in the lower space of the energy storage device 16 pass through the inlet end of the primary return water pipe and enter the primary return water pipe; The second part of the chilled water entering the energy storage device 16 successively passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply water pipe 18, the outlet end of the secondary supply water pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; After the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and also enters the primary return water pipe; After being mixed with the chilled water entering the primary return water pipe through the inlet end of the primary return water pipe, it successively passes through the outlet end of the primary return water pipe, the suction end of the primary water pump 9, the outlet end of the primary water pump 9, and the inlet end of the water side of the second heat exchanger 4, and returns to the outlet end of the water side of the second heat exchanger 4 again; Thus, one cycle of the water system is completed.

[0229] 4) Chilled energy storage operation stage

[0230] During the operation of this stage, the compression mechanism 1 and the primary water pump 9 do not work; the secondary water pump 13 works normally. The direct current outlet end 24 of the diverting three-way regulating valve 11 is closed, and the bypass outlet end 25 of the diverting three-way regulating valve 11 is fully open. At this time, during the peak electricity period, the chilled energy stored in the energy storage device 16 is used to supply cooling to the user.

[0231] The working process of the water system is as follows: The chilled water in the energy storage device 16 successively passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary supply water pipe 18, the outlet end of the secondary supply water pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to supply cooling to the user; After the chilled water absorbs heat and the water temperature rises, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and enters the primary return water pipe; Then it returns to the energy storage device 16 through the inlet end of the primary return water pipe. Thus, one cycle of the water system is completed.

[0232] At Figure 6In the water system of the heat pump device shown, the inlet end of the secondary water supply pipe 18 is connected to the energy storage device 16 successively through the outlet end of the secondary water pump 13 and the suction end of the secondary water pump 13; when the secondary water pump 13 is arranged at the outlet end of the secondary water return pipe 17, the inlet end of the secondary water supply pipe 18 is directly connected to the energy storage device 16; usually it is connected to the upper space of the energy storage device 16. The disadvantages of the above two schemes are as follows: during the rapid cooling stage of the secondary pipe network water temperature, part of the water in the energy storage device 16 will participate in the circulation of the water system, so to a certain extent, it will prolong the rapid cooling of the chilled water temperature and reach the time required for normal use. In actual application, there are the following two further improvement schemes.

[0233] When the secondary water pump 13 is arranged at the inlet end of the secondary water supply pipe 18, the connection mode of the first improvement scheme is: the inlet end of the secondary water supply pipe 18 is connected to the pipe between the DC outlet end 24 of the shunt three-way regulating valve 11 and the energy storage device 16 successively through the outlet end of the secondary water pump 13 and the suction end of the secondary water pump 13.

[0234] When the secondary water pump 13 is arranged at the outlet end of the secondary water return pipe 17, the connection mode of the second improvement scheme is: the inlet end of the secondary water supply pipe 18 is directly connected to the pipe between the DC outlet end 24 of the shunt three-way regulating valve 11 and the energy storage device 16.

[0235] The above two improvement schemes can avoid the water in the energy storage device 16 from participating in the circulation of the water system during the rapid cooling stage of the secondary pipe network water temperature, and can shorten the rapid cooling of the chilled water temperature and reach the time required for normal use.

[0236] The above two improvement schemes are also applicable to the heat pump device schemes described in Embodiments 8 and 9.

[0237] For Figure 6 the energy storage device 16 of the heat pump device shown can also adopt Figure 2 the energy storage device 16 in the scheme shown, that is: the energy storage device 16 at least includes two energy storage water tanks, namely the first energy storage water tank 21 and the second energy storage water tank 22. At this time, the energy storage device 16 has the following four connection modes in the system.

[0238] 1) When the secondary water pump 13 is arranged at the inlet end of the secondary water supply pipe 18, connection mode one: the DC outlet end 24 of the shunt three-way regulating valve 11 is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the first energy storage water tank 21 of the energy storage device 16 successively through the outlet end of the secondary water pump 13 and the suction end of the secondary water pump 13; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through the connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the inlet end of the primary water return pipe.

[0239] 2) When the secondary water pump 13 is installed at the outlet end of the secondary return pipe 17, Connection Method 2: The DC outlet end 24 of the flow-dividing three-way regulating valve 11 is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the first energy storage water tank 21 of the energy storage device 16; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through a connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the inlet end of the primary return pipe.

[0240] 3) When the secondary water pump 13 is installed at the inlet end of the secondary water supply pipe 18, Connection Method 3: The DC outlet end 24 of the flow-dividing three-way regulating valve 11 is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is sequentially connected to the pipe between the DC outlet end 24 of the flow-dividing three-way regulating valve 11 and the first energy storage water tank 21 through the outlet end and the suction end of the secondary water pump 13; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through a connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the inlet end of the primary return pipe.

[0241] 4) When the secondary water pump 13 is installed at the outlet end of the secondary return pipe 17, Connection Method 4: The DC outlet end 24 of the flow-dividing three-way regulating valve 11 is connected to the first energy storage water tank 21 of the energy storage device 16; the inlet end of the secondary water supply pipe 18 is connected to the pipe between the DC outlet end 24 of the flow-dividing three-way regulating valve 11 and the first energy storage water tank 21; the first energy storage water tank 21 is connected to the second energy storage water tank 22 through a connecting pipe 19; the second energy storage water tank 22 of the energy storage device 16 is connected to the inlet end of the primary return pipe.

[0242] The above four connection schemes are also applicable to the heat pump equipment schemes described in Embodiment 8 and Embodiment 9.

[0243] Embodiment 8

[0244] As Figure 7 shown, this embodiment is a heat pump equipment for producing air-conditioning chilled and hot water; the difference between it and Figure 6 the heat pump equipment shown is that a four-way valve 70 is added to the refrigerant system of the heat pump equipment, and the connection method of the four-way valve 70 in the system is: the high-pressure node 71 of the four-way valve 70 is connected to the outlet end of the compression mechanism 1, the low-pressure node 73 of the four-way valve 70 is connected to the inlet end of the compression mechanism 1, and any one of the two commutation nodes 72 of the four-way valve 70 is sequentially connected to the other commutation node 74 of the four-way valve 70 through the first heat exchanger 3, the throttling mechanism 5, and the second heat exchanger 4.

[0245] The function of the four-way valve 70 in the system is to switch the refrigerant flow direction to achieve the switching between the refrigeration mode and the heating mode. The throttling mechanism 5 is an electronic expansion valve. The shunt three-way regulating valve 11 is an electric three-way regulating valve. When operating in the refrigeration mode, the second heat exchanger 4 is an evaporator for producing chilled water; the first heat exchanger 3 is a condenser for dissipating the condensation heat generated by refrigeration to the environment (outdoor air, water, soil, etc.). When operating in the heating mode, the second heat exchanger 4 is a condenser for producing hot air-conditioning water; the first heat exchanger 3 is an evaporator for absorbing heat from the environment (outdoor air, water, soil, etc.).

[0246] The heat pump device is divided into two parts: a refrigerant system and a water system; their working processes are described as follows respectively.

[0247] (1) Working process of the refrigerant system

[0248] 1) The working process of the refrigerant under the refrigeration mode is the same as that of Embodiment 3.

[0249] 2) The working process of the refrigerant under the heating mode is also the same as that of Embodiment 3.

[0250] (2) Working process of the water system

[0251] The water system of the heat pump device is also a secondary pump system. The primary pipe network consists of the second heat exchanger 4, the primary water pump 9, the shunt three-way regulating valve 11, the energy storage device 16, the primary water supply pipe and the primary water return pipe. The secondary pipe network consists of the secondary water pump 13, the user terminal 14, the energy storage device 16, the secondary water supply pipe 18 and the secondary water return pipe 17.

[0252] Figure 7 During the working process of the water system of the shown heat pump device under the refrigeration mode, according to the time sequence of starting and running, it is also divided into three stages: the rapid temperature drop of the secondary pipe network water temperature, the overall water temperature drop of the energy storage device 16, and the stable operation of the water system, and there is also a chilled water storage operation stage. The working processes of the water system in the above four stages are the same as those of Embodiment 7. Figure 7 During the working process of the water system of the shown heat pump device under the heating mode, according to the time sequence of starting and running, it is divided into three stages: the rapid temperature rise of the secondary pipe network water temperature, the overall water temperature rise of the energy storage device 16, and the stable operation of the water system, and there are also three stages: heat storage operation, winter defrosting operation, and winter anti-freezing operation. The working processes of the water system in the above six stages are described as follows respectively.

[0253] 1) Stage of rapid temperature rise of the secondary pipe network water temperature

[0254] This stage appears in Figure 7When the heat pump device shown starts in the heating condition for the first time, at this time, the water temperature in the entire water system is relatively low. After the hot water enters the second heat exchanger 4 and exchanges heat with the refrigerant once and is heated, the water temperature coming out of the second heat exchanger 4 still cannot reach the normal use requirement of the user terminal 14. Therefore, in order to quickly raise the water temperature of the hot water sent to the user terminal 14, reach the normal use requirement, shorten the waiting time of the user, and improve the user experience; so the water system needs to use the operation of this stage. When working in this stage, the primary water pump 9 and the secondary water pump 13 are both working normally. The direct outlet end 24 and the bypass outlet end 25 of the flow dividing three-way regulating valve 11 are both opened; the opening degree of the direct outlet end 24 of the flow dividing three-way regulating valve 11 is just such that the water flow rate passing through the direct outlet end 24 of the flow dividing three-way regulating valve 11 is equal to the circulating water flow rate of the secondary network. Therefore, during the working process of this stage, it is possible to avoid the hot water with a relatively low temperature at the lower part of the energy storage device 16 from entering the suction end of the primary water pump 9, so that the water temperature of the hot water sent to the user terminal 14 quickly rises to reach the normal use requirement.

[0255] The working process of the water system in this stage is the same as that of the secondary network water temperature rapid cooling stage in the refrigeration condition of Embodiment 7. The difference is that: in the heating condition, hot water circulates in the water system; in the user terminal 14, the hot water dissipates heat to the user.

[0256] 2) Overall water temperature raising stage of the energy storage device 16

[0257] Figure 7 After the heat pump device shown operates in the heating condition through the first stage, the water temperature of the hot water sent to the user terminal 14 has gradually increased, but at this time, the water temperature of the hot water in the lower space of the energy storage device 16 is still relatively low; therefore, it is necessary to gradually heat the hot water in the lower space of the energy storage device 16 in this stage.

[0258] When working in this stage, the primary water pump 9 and the secondary water pump 13 are both working normally. The direct outlet end 24 and the bypass outlet end 25 of the flow dividing three-way regulating valve 11 are both opened; during the working process, the flow dividing three-way regulating valve 11 adjusts the opening degrees of the direct outlet end 24 and the bypass outlet end 25 of the flow dividing three-way regulating valve 11 according to the hot water temperature at the water side outlet end of the second heat exchanger 4; that is: when working, by adjusting the opening degree of the flow dividing three-way regulating valve 11, the hot water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the expected value, while gradually heating the hot water in the lower space of the energy storage device 16, and also ensuring that the water temperature of the hot water sent to the user terminal 14 reaches the normal working requirement.

[0259] The working process of the water system in this stage is the same as that of the overall water temperature reduction stage of the energy storage device 16 in the refrigeration condition of Embodiment 7. The difference is that: under the heating condition, hot water circulates in the water system; in the user terminal 14, the hot water dissipates heat to the users.

[0260] 3) Stable operation stage of the water system

[0261] When entering this stage of work under the heating condition, the primary water pump 9 and the secondary water pump 13 are both working properly. The direct current outlet end 24 of the flow splitting three-way regulating valve 11 is fully open, and the bypass outlet end 25 of the flow splitting three-way regulating valve 11 is closed.

[0262] If the compression mechanism 1 is a variable frequency compressor, during the working process, the compression mechanism 1 regulates the working frequency of the compressor according to the hot water temperature at the water side outlet end of the second heat exchanger 4; that is: during work, by regulating the working frequency of the compressor, the hot water temperature at the water side outlet end of the second heat exchanger 4 is maintained at the desired value. If the compression mechanism 1 is a fixed frequency compressor, during the working process, the compression mechanism 1 adopts the working mode of starting and stopping the compressor according to the change of the hot water temperature at the water side outlet end of the second heat exchanger 4 to keep the hot water temperature at the water side outlet end of the second heat exchanger 4 within the desired value range.

[0263] The working process of the water system in this stage is the same as that of the stable operation stage of the water system in the refrigeration condition of Embodiment 7. The difference is that: hot water circulates in the water system under the heating condition; in the user terminal 14, the hot water dissipates heat to the users.

[0264] 4) Heat storage operation stage

[0265] During the work of this stage, the compression mechanism 1 and the primary water pump 9 do not work; the secondary water pump 13 works properly. The direct current outlet end 24 of the flow splitting three-way regulating valve 11 is in the closed state, while the bypass outlet end 25 of the flow splitting three-way regulating valve 11 is fully open. At this time, the heat stored in the energy storage device 16 is used to heat the users during the peak electricity period.

[0266] The working process of the water system is: the hot water in the energy storage device 16 sequentially passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to heat the users; after the hot water releases heat and the water temperature drops, it sequentially passes through the outlet of the user terminal 14, the inlet end of the secondary water return pipe 17, and the outlet end of the secondary water return pipe 17, and enters the primary water return pipe; and then returns to the energy storage device 16 through the inlet end of the primary water return pipe, thus completing one cycle of the water system.

[0267] 5) Winter defrosting operation stage

[0268] During the operation of this stage, the refrigerant system of the heat pump equipment in this embodiment needs to be switched to the refrigeration working condition. Therefore, the second heat exchanger 4 becomes an evaporator, absorbing heat from the hot water, while the first heat exchanger 3 becomes a condenser, using the heat absorbed by the second heat exchanger 4 from the hot water to defrost. In order to avoid the adverse impact on the normal heating of the heat pump equipment caused by the decrease in the hot water temperature during defrosting in winter, the heat pump equipment in this embodiment needs to enter this operation stage. During operation, the direct current outlet end 24 of the flow dividing three-way regulating valve 11 is closed, and the bypass outlet end 25 of the flow dividing three-way regulating valve 11 is fully opened. The primary water pump 9 and the secondary water pump 13 are both operating normally.

[0269] In this operation stage, the working process of the refrigerant system of this heat pump equipment is the same as that of the refrigerant working process under the refrigeration working condition of the solution shown in Embodiment 3 Figure 3 The working process of its water system is as described below:

[0270] After the hot water is pressed out from the outlet end of the primary water pump 9, it enters the second heat exchanger 4 through the water side inlet end of the second heat exchanger 4 to exchange heat with the refrigerant. After the hot water releases heat and is cooled down, it successively passes through the water side outlet end of the second heat exchanger 4, the inlet end of the primary water supply pipe, the outlet end of the primary water supply pipe, the inlet end of the flow dividing three-way regulating valve 11, and the bypass outlet end 25 of the flow dividing three-way regulating valve 11, and enters the primary return water pipe;

[0271] The hot water in the energy storage device 16 successively passes through the suction end of the secondary water pump 13, the outlet end of the secondary water pump 13, the inlet end of the secondary water supply pipe 18, the outlet end of the secondary water supply pipe 18, and the inlet of the user terminal 14, and enters the user terminal 14 to heat the user; after the hot water releases heat and the water temperature drops, it successively passes through the outlet of the user terminal 14, the inlet end of the secondary return water pipe 17, and the outlet end of the secondary return water pipe 17, and also enters the primary return water pipe; after being mixed with the hot water entering the primary return water pipe through the bypass outlet end 25 of the flow dividing three-way regulating valve 11, it is divided into two paths; the first path of hot water successively passes through the outlet end of the primary return water pipe and the suction end of the primary water pump 9, and enters the primary water pump 9 again to be pressurized; the second path of hot water returns to the energy storage device 16 through the inlet end of the primary return water pipe, thus completing the cycle of the primary water system.

[0272] 6) Winter anti-freezing operation stage

[0273] For the heat pump equipment described in this embodiment, when it is used in a cold climate area, in winter when the compression mechanism 1 temporarily stops operating, since the second heat exchanger 4 is a refrigerant-water heat exchanger and there is hot water stored inside it, if this hot water does not flow, then due to the heat dissipation on the surface of the second heat exchanger 4, the water inside the second heat exchanger 4 will freeze, and the second heat exchanger 4 will be damaged by freezing. Therefore, in this case, it is necessary to ensure that there is hot water circulating flow in the second heat exchanger 4.

[0274] When the heat pump device in this embodiment operates in the winter anti-freezing operation stage, the direct current outlet end 24 of the flow dividing three-way regulating valve 11 is closed, and the by-pass outlet end 25 of the flow dividing three-way regulating valve 11 is fully opened. The primary water pump 9 and the secondary water pump 13 are both operating normally; the compression mechanism 1 is not operating. The refrigerant system of the heat pump device remains in the heating working condition. The working process of the water system of the heat pump device in the winter anti-freezing operation stage is the same as that in the winter defrosting operation stage of this embodiment.

[0275] As can be seen from the working process of the water system of the heat pump device in the above winter anti-freezing operation stage: during the hot water circulation process of the water system, the heat stored in the energy storage device 16 is utilized to maintain normal heating to the user terminal 14, and at the same time, it is ensured that there is hot water circulating in the second heat exchanger 4; also, the mixing water loss in the energy storage device 16 caused by the anti-freezing of the second heat exchanger 4 is avoided, and it will not have an adverse impact on the hot water temperature sent to the user terminal 14. Because the relatively low-temperature hot water enters the lower space of the energy storage device 16 through the inlet end of the primary return pipe.

[0276] The working processes of the water system under the above-mentioned heating working condition in the rapid heating stage of the secondary pipe network water temperature, the overall water temperature elevation stage of the energy storage device 16, the stable operation of the water system, the heat storage operation, and the winter anti-freezing operation stage are also applicable to the solution described in Embodiment 9 and its variant solutions.

[0277] Embodiment 9

[0278] This embodiment is a variant solution based on the solution shown in Embodiment 7 Figure 6 The only difference from the solution shown in Figure 6 is that the connection relationship between the compression mechanism 1 and the first heat exchanger 3 and the second heat exchanger 4 has changed; in this embodiment, the connection mode of the refrigerant system of the heat pump device is: the outlet end of the compression mechanism 1 is successively connected to the inlet end of the compression mechanism 1 through the second heat exchanger 4, the throttling mechanism 5, and the first heat exchanger 3. When working, the second heat exchanger 4 becomes a condenser for producing air-conditioning hot water; the first heat exchanger 3 is an evaporator for absorbing heat from the environment (such as water or soil, etc.). Similarly, the throttling mechanism 5 is an electronic expansion valve. The flow dividing three-way regulating valve 11 is an electric three-way regulating valve.

[0279] This heat pump device is also divided into two parts: a refrigerant system and a water system; their working processes are described as follows respectively.

[0280] (1) The working process of the refrigerant system in this embodiment is the same as that of the refrigerant system in Embodiment 4.

[0281] (2) The working process of the water system

[0282] The composition and connection mode of the water system of the heat pump device in this embodiment are the same as those in Embodiment 7 Figure 6The water system of the shown solution is the same; its water system is also a secondary pump system. The primary pipe network consists of a second heat exchanger 4, a primary water pump 9, a shunt three-way regulating valve 11, an energy storage device 16, a primary water supply pipe, and a primary water return pipe. The secondary pipe network consists of a secondary water pump 13, user terminals 14, an energy storage device 16, a secondary water supply pipe 18, and a secondary water return pipe 17.

[0283] During the operation of the water system of the heat pump device in this embodiment, according to the time sequence of startup and operation, it is divided into three stages: rapid temperature rise of the secondary pipe network water temperature, overall temperature rise of the energy storage device 16, and stable operation of the water system; there are also two stages: heat storage operation and winter anti-freezing operation. The working processes of the water system in the above five stages are respectively the same as those in Embodiment 8 Figure 7 The working processes of the rapid temperature rise of the secondary pipe network water temperature, overall temperature rise of the energy storage device 16, stable operation of the water system, heat storage operation, and winter anti-freezing operation stages of the heating condition of the shown solution are the same.

Claims

1. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: The heat pump device further includes a confluence three-way regulating valve (10); the outlet end of the compression mechanism (1) is sequentially connected to the inlet end of the compression mechanism (1) through a first heat exchanger (3), a throttling mechanism (5), and a second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the confluence three-way regulating valve (10), and the direct-current inlet end (15) of the confluence three-way regulating valve (10); the bypass inlet end (12) of the confluence three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

2. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: The heat pump device further includes a confluence three-way regulating valve (10); the inlet end of the compression mechanism (1) is sequentially connected to the outlet end of the compression mechanism (1) through a first heat exchanger (3), a throttling mechanism (5), and a second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the confluence three-way regulating valve (10), and the direct-current inlet end (15) of the confluence three-way regulating valve (10); the bypass inlet end (12) of the confluence three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

3. The heat pump device according to any one of claims 1 or 2, characterized in that The inlet end of a one-way valve (20) is connected to the pipeline of the outlet end of the confluence three-way regulating valve (10), and the outlet end of the one-way valve (20) is connected to the pipeline of the direct-current inlet end (15) of the confluence three-way regulating valve (10); the inlet end of a flow control valve (23) is connected to the outlet end of the primary water supply pipe, and the outlet end of the flow control valve (23) is connected to the energy storage device (16).

4. The heat pump device according to claim 3, wherein The energy storage device (16) at least includes two energy storage water tanks, namely a first energy storage water tank (21) and a second energy storage water tank (22); the outlet end of the flow control valve (23) is connected to the first energy storage water tank (21); the inlet end of the secondary water supply pipe (18) is also connected to the first energy storage water tank (21); the first energy storage water tank (21) is connected to the second energy storage water tank (22) through a connecting pipe (19); the second energy storage water tank (22) is connected to the outlet end of the one-way valve (20) and the direct-current inlet end (15) of the confluence three-way regulating valve (10).

5. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: The heat pump device further includes a combined flow three-way regulating valve (10); the outlet end of the compression mechanism (1) is sequentially connected to the inlet end of the compression mechanism (1) through a first heat exchanger (3), a throttling mechanism (5), and a second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the combined flow three-way regulating valve (10), and the direct-current inlet end (15) of the combined flow three-way regulating valve (10); the bypass inlet end (12) of the combined flow three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the primary water supply pipe through the outlet end and the inlet end of the secondary water supply pipe (18).

6. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: The heat pump device further includes a combined flow three-way regulating valve (10); the inlet end of the compression mechanism (1) is sequentially connected to the outlet end of the compression mechanism (1) through a first heat exchanger (3), a throttling mechanism (5), and a second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe and the outlet end of the primary water supply pipe; the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary return water pipe, the inlet end of the primary return water pipe, the outlet end of the combined flow three-way regulating valve (10), and the direct-current inlet end (15) of the combined flow three-way regulating valve (10); the bypass inlet end (12) of the combined flow three-way regulating valve (10) is connected to the primary water supply pipe; the outlet of the user terminal (14) is sequentially connected to the primary return water pipe through the inlet end and the outlet end of the secondary return water pipe (17), and the inlet of the user terminal (14) is sequentially connected to the primary water supply pipe through the outlet end and the inlet end of the secondary water supply pipe (18).

7. The heat pump device according to any one of claims 5 or 6, characterized in that The inlet end of a check valve (20) is connected to the pipeline of the outlet end of the combined flow three-way regulating valve (10), and the outlet end of the check valve (20) is connected to the pipeline of the direct-current inlet end (15) of the combined flow three-way regulating valve (10); the inlet end of a flow control valve (23) is connected to the outlet end of the primary water supply pipe, and the outlet end of the flow control valve (23) is connected to the inlet end of the secondary water supply pipe (18) and the energy storage device (16).

8. The heat pump device according to claim 7, characterized in that The energy storage device (16) at least includes two energy storage water tanks, namely a first energy storage water tank (21) and a second energy storage water tank (22); the first energy storage water tank (21) is connected to the outlet end of the flow control valve (23) and the inlet end of the secondary water supply pipe (18) through a connection port; the first energy storage water tank (21) is connected to the second energy storage water tank (22) through a connecting pipe (19); the second energy storage water tank (22) is connected to the outlet end of the check valve (20) and the direct-current inlet end (15) of the combined flow three-way regulating valve (10).

9. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: The heat pump device further includes a flow dividing three-way regulating valve (11); the outlet end of the compression mechanism (1) is sequentially connected to the inlet end of the compression mechanism (1) through a first heat exchanger (3), a throttling mechanism (5), and a second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe, the outlet end of the primary water supply pipe, the inlet end of the flow dividing three-way regulating valve (11), and the direct current outlet end (24) of the flow dividing three-way regulating valve (11); the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary water return pipe and the inlet end of the primary water return pipe; the bypass outlet end (25) of the flow dividing three-way regulating valve (11) is connected to the primary water return pipe; the outlet of the user terminal (14) is sequentially connected to the primary water return pipe through the inlet end and the outlet end of the secondary water return pipe (17), and the inlet of the user terminal (14) is sequentially connected to the energy storage device (16) or the pipe between the direct current outlet end (24) of the flow dividing three-way regulating valve (11) and the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

10. A heat pump device, comprising a compression mechanism (1), a first heat exchanger (3), a second heat exchanger (4), a throttling mechanism (5), a user terminal (14) and an energy storage device (16), characterized in that: The heat pump device further includes a flow dividing three-way regulating valve (11); the inlet end of the compression mechanism (1) is sequentially connected to the outlet end of the compression mechanism (1) through a first heat exchanger (3), a throttling mechanism (5), and a second heat exchanger (4); the water-side outlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the inlet end of the primary water supply pipe, the outlet end of the primary water supply pipe, the inlet end of the flow dividing three-way regulating valve (11), and the direct current outlet end (24) of the flow dividing three-way regulating valve (11); the water-side inlet end of the second heat exchanger (4) is sequentially connected to the energy storage device (16) through the outlet end of the primary water return pipe and the inlet end of the primary water return pipe; the bypass outlet end (25) of the flow dividing three-way regulating valve (11) is connected to the primary water return pipe; the outlet of the user terminal (14) is sequentially connected to the primary water return pipe through the inlet end and the outlet end of the secondary water return pipe (17), and the inlet of the user terminal (14) is sequentially connected to the energy storage device (16) or the pipe between the direct current outlet end (24) of the flow dividing three-way regulating valve (11) and the energy storage device (16) through the outlet end and the inlet end of the secondary water supply pipe (18).

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