Assembly type water tank energy storage air source heat pump cold and hot water system

Abstract

The invention provides an assembly type water tank energy storage air source heat pump cold and hot water system which comprises an air source heat pump system, a combined type energy storage water tank, a booster water pump, a control valve set and a water system connecting pipeline. The system comprises a condenser, an evaporator, an expansion valve, a four-way reversing valve and a compressor. The combined energy storage water tank is connected with the air source heat pump system through a water system connecting pipeline and comprises a first assembly type water inlet and outlet unit, a standard unit and a second assembly type water inlet and outlet unit. The booster pump is mounted at a water inlet of the water system connecting pipeline; and the control valve group comprises first to ninth control valves and first to fourth one-way check valves. Through combination of energy storage of the modular water tank and efficient heating and refrigerating functions of the air source heat pump, accurate layering and efficient energy storage of cold water and hot water are achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of cold and hot water supply, and particularly to a prefabricated water tank energy storage air source heat pump cold and hot water system. Background Art

[0002] With the continuous progress of building technology, the requirements for cold and hot water supply systems are increasing. In the prior art, although the combination of water tank energy storage and air source heat pump shows energy-saving potential, the problem of cold and hot water mixing seriously restricts the system efficiency. Early patents such as CN2755510Y reduced mixing through a layered partition design, but the structure was fixed and the control of water flow disturbance was insufficient; CN104729341A further introduced a diversion partition and a water distributor to optimize stratification, but the complex structure led to difficult maintenance and poor adaptability to high-density temperature differences. Although the air source heat pump achieves high energy efficiency (COP≥3.5) through high-potential energy conversion, the traditional split system has significant energy efficiency decay due to frequent start and stop of the heat pump caused by water tank mixing. The inlet and outlet methods of the water tank also greatly affect the energy storage of the water tank and its combination with the air source heat pump system. Traditional designs often use a single inlet and outlet, resulting in uneven stratification of cold and hot water and low energy storage efficiency. Summary of the Invention

[0003] To solve the above technical problems, this patent proposes a prefabricated water tank energy storage air source heat pump cold and hot water system.

[0004] To achieve the above object, the technical solution of the present disclosure is as follows:

[0005] An assembled water tank energy storage air source heat pump cold and hot water system is provided, including: an air source heat pump system, a combined energy storage water tank, a booster pump, a control valve group, and a water system connecting pipeline. It is characterized in that the air source heat pump system is connected to the combined energy storage water tank through the water system connecting pipeline, and includes a first heat exchanger as a condenser, a second heat exchanger as an evaporator, an expansion valve, a four-way reversing valve, and a compressor; the combined energy storage water tank is connected to the air source heat pump system through the water system connecting pipeline and includes a first assembled water inlet and outlet unit, a standard unit, and a second assembled water inlet and outlet unit; the booster pump is installed at the water inlet of the water system connecting pipeline to provide the power required for the water system circulation; the control valve group includes a first control valve to a ninth control valve and a first one-way check valve to a fourth one-way check valve, and all the control valve group is installed in the water system connecting pipeline to perform the switching control of the cold and hot water circulation system; the water system connecting pipeline includes a first water system connecting pipeline, a second water system connecting pipeline, a first expansion pipe, and a second expansion pipe to connect the air source heat pump system and the combined energy storage water tank, and the control valve group is installed on the water system connecting pipeline; wherein, the water outlet of the first assembled water inlet and outlet unit in the combined energy storage water tank is connected to the water inlet of the standard unit, the water outlet of the standard unit is connected to the water inlet of the second assembled water inlet and outlet unit, the first assembled water inlet and outlet unit includes a heat preservation box body, a first water inlet pipe, a first water distribution structure, and a first water outlet structure, the first water inlet pipe is located at the top of the heat preservation box body and is connected to the first water distribution structure, the first water outlet structure is located at the bottom of the heat preservation box body and is a rectangular structure; the standard unit includes a heat preservation box body, a second water inlet pipe, a second water distribution structure, and a second water outlet structure, the second water inlet pipe is located at the bottom of the heat preservation box body and is connected to the second water distribution structure through a connecting pipe, the second water outlet structure is located at the bottom of the heat preservation box body and is a rectangular structure; the second assembled water inlet and outlet unit includes a heat preservation box body, a third water inlet pipe, a third water distribution structure, and a third water outlet structure, the third water inlet pipe is located at the bottom of the heat preservation box body and is connected to the third water distribution structure through a connecting pipe, the third water outlet structure is located at the bottom of the heat preservation box body and is connected to the water outlet pipeline.

[0006] In some embodiments, the first expansion pipe and the second expansion pipe of the combined energy storage water tank are respectively located at the bottoms of the first assembled water inlet and outlet unit and the second assembled water inlet and outlet unit, are connected to the system water inlet pipeline, and a differential pressure one-way valve is arranged in the first expansion pipe and the second expansion pipe.

[0007] In some embodiments, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve, the eighth control valve, the ninth control valve, the first one-way check valve, the second one-way check valve, the third one-way check valve, and the fourth one-way check valve in the control valve group are respectively located on different pipelines, and the pipelines are adjusted by opening and closing the valves.

[0008] In some embodiments, a variable-frequency compressor is adopted in the air source heat pump system.

[0009] In some embodiments, the evaporator in the air source heat pump system is a plate evaporator, which is composed of multiple parallel metal plates. The refrigerant and the liquid to be cooled flow between the metal plates for heat exchange.

[0010] In some embodiments, a heat preservation structure is additionally provided outside the combined energy storage water tank, and the heat preservation material of the heat preservation structure is aerogel, heat preservation rock wool or foam heat preservation board.

[0011] In some embodiments, the booster water pump is a canned motor pump.

[0012] In some embodiments, by opening and closing the control valve group and switching between cooling and heating of the air source heat pump system, the mode switching of cold storage, heat storage, energy storage for cooling, energy storage for heating, direct cooling, and direct heating can be realized. When the air source heat pump system is in the cooling mode, the second control valve, the third control valve, the fifth control valve, the sixth control valve, and the eighth control valve are opened, and the first control valve, the fourth control valve, the seventh control valve, and the ninth control valve are closed for the cold storage mode; when the air source heat pump system is in the heating mode, the second control valve, the fourth control valve, the fifth control valve, the seventh control valve, and the eighth control valve are opened, and the first control valve, the third control valve, the sixth control valve, and the ninth control valve are closed for the heat storage mode; the first control valve, the fifth control valve, the sixth control valve, the seventh control valve, and the eighth control valve are opened, and the second control valve, the third control valve, the fourth control valve, and the ninth control valve are closed for the energy storage for heating mode; the second control valve, the third control valve, the fourth control valve, the fifth control valve, and the ninth control valve are opened, and the first control valve, the sixth control valve, the seventh control valve, and the eighth control valve are closed for the energy storage for cooling mode; when the air source heat pump system is in the heating mode, the first control valve, the second control valve, the third control valve, the fifth control valve, and the sixth control valve are opened, and the fourth control valve, the seventh control valve, the eighth control valve, and the ninth control valve are closed for the direct heating mode; when the air source heat pump system is in the cooling mode, the fourth control valve, the fifth control valve, the seventh control valve, the eighth control valve, and the ninth control valve are opened, and the first control valve, the second control valve, the third control valve, and the sixth control valve are closed for the direct cooling mode.

[0013] In some embodiments, the water distribution structure in the combined energy storage water tank adopts a uniformly distributed nozzle design to ensure that the water flow is evenly distributed in the heat preservation box body and reduce the cold and heat mixing caused by the flow.

[0014] In some embodiments, the standard units in the combined energy storage water tank can be assembled, and the number of combined units is 1-5.

[0015] The present disclosure combines the efficient heating and cooling functions of a modular water tank energy storage and an air source heat pump to achieve precise stratification and efficient energy storage of cold and hot water. It has modes of cold energy storage, heat energy storage, energy storage for cooling, energy storage for heating, direct cooling, and direct heating. During the valley period of the electricity wave at night, electrical energy is used for heat storage or cold storage, and during the peak period of the electricity wave during the day, heat release or cold release is carried out, greatly improving the energy storage efficiency and effectively reducing the phenomenon of cold and heat mixing. This enables the air source heat pump system to operate stably, reducing energy consumption and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows the operating system diagram of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments.

[0017] Figures 2a to 2c Shows the three - view drawings of the water tank structure of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments, namely the top view, side view, and front view.

[0018] Figure 3 Shows the heat storage operation diagram of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments.

[0019] Figure 4 Shows the cold storage operation diagram of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments.

[0020] Figure 5 Shows the energy storage for heating operation diagram of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments.

[0021] Figure 6 Shows the energy storage for cooling operation diagram of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments.

[0022] Figure 7 Shows the direct heating operation diagram of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments.

[0023] Figure 8 Shows the direct cooling operation diagram of an assembled water tank energy storage air source heat pump cold and hot water system according to some embodiments.

[0024] Among them, 1 - air source heat pump system; 2 - combined energy storage water tank; 3 - heat preservation box body; 4 - water distribution structure; 5 - first assembled water inlet and outlet unit; 6 - standard unit; 7 - second assembled water inlet and outlet unit; 8 - first heat exchanger; 9 - compressor; 10 - expansion valve; 11 - second heat exchanger; 12 - four-way reversing valve; 13 - booster pump; 14 - first expansion pipe; 15 - second expansion pipe; 16 - first control valve; 17 - second control valve; 18 - third control valve; 19 - fourth control valve; 20 - fifth control valve; 21 - sixth control valve; 22 - seventh control valve; 23 - eighth control valve; 24 - ninth control valve; 25 - first check valve; 26 - second check valve; 27 - third check valve; 28 - fourth check valve; 29 - water inlet pipe; 30 - water outlet structure. Detailed implementation manners

[0025] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings.

[0026] Embodiment 1 Heat storage mode

[0027] An assembled water tank energy storage air source heat pump cold and hot water system includes: an air source heat pump system 1, a combined energy storage water tank 2, a booster pump 13, a control valve group, a water system connection pipeline, etc. The air source heat pump system 1 is connected to the combined energy storage water tank 2 through the water system connection pipeline, and includes a condenser (first heat exchanger) 8, an evaporator (second heat exchanger) 11, an expansion valve 10, a four-way reversing valve 12, and a compressor 9; the combined energy storage water tank 2 is connected to the air source heat pump system 1 through the water system connection pipeline and includes a first assembled water inlet and outlet unit 5, a standard unit 6, and a second assembled water inlet and outlet unit 7; the control valve group includes a first control valve to a ninth control valve 16 - 24 and a first check valve to a fourth check valve 25 - 28. The control valve group is all installed in the water system connection pipeline to perform switching control of the cold and hot water circulation system; the water system connection pipeline includes a first water system connection pipeline (such as Figure 3 the hot water supply pipeline shown), a second water system connection pipeline (such as Figure 4 the cold water supply pipeline shown), a first expansion pipe 14, and a second expansion pipe 15, which are used to connect the air source heat pump system 1 and the combined energy storage water tank 2, and the control valve group is installed thereon.

[0028] The water outlet of the first assembled water inlet / outlet unit 5 in the combined energy storage water tank 2 is connected to the water inlet of the standard unit 6, and the water outlet of the standard unit 6 is connected to the water inlet of the second assembled water inlet / outlet unit 7. The first assembled water inlet / outlet unit 5 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the top of the heat preservation box body 3 and is connected to the water distribution structure 4. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The standard unit 6 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The second assembled water inlet / outlet unit 7 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30 (here the internal structures of the standard unit and the second assembled water inlet / outlet unit 7 are the same, and the standard unit is replaced by ellipsis, and the internal structures are all the same). The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is connected to the water outlet pipe. This structure can effectively avoid the mixing of cold and hot water. In the present disclosure, for the first assembled water inlet / outlet unit 5, the standard unit 6 and the second assembled water inlet / outlet unit 7, the water outlet of the previous unit structure is connected to the water inlet of the next unit, and the water distribution structure and the connected connecting pipe are an integral part connected to the water inlet. The first assembled water inlet / outlet unit 5, the standard unit 6 and the second assembled water inlet / outlet unit 7 are located inside a heat preservation box body and share a heat preservation box body.

[0029] To achieve the heat storage purpose of the present disclosure, as Figure 3 shown, open the second control valve 17, the fourth control valve 19, the fifth control valve 20, the seventh control valve 22, the eighth control valve 23, close the first control valve 16, the third control valve 18, the sixth control valve 21, the ninth control valve 24, and turn on the air source heat pump refrigeration mode and the water pump through the four-way reversing valve 12. The normal temperature water is driven by the water pump to enter the first heat exchanger 8 to exchange heat with the air source heat pump system 1. After absorbing heat, it enters the second assembled water inlet / outlet unit 7 of the combined energy storage water tank 2 through the second control valve 17, and then passes through the standard unit 6, the first assembled water inlet / outlet unit 5, and then flows out through the eighth control valve 23 and the third one-way check valve 27 and enters the water pump suction port for circulation, so as to realize the heat storage function. In order to prevent the problem of excessive water tank pressure caused by the redundancy of the system when the water pump starts, a first expansion pipe 14 with a check valve is set for pressure balance.

[0030] Embodiment 2 Cooling mode

[0031] An assembled water tank energy storage air source heat pump cold and hot water system, comprising: an air source heat pump system 1, a combined energy storage water tank 2, a booster pump 13, a control valve group, a water system connecting pipeline, etc. The air source heat pump system 1 is connected to the combined energy storage water tank 2 through the water system connecting pipeline, and includes a condenser (first heat exchanger) 8, an evaporator (second heat exchanger) 11, an expansion valve 10, a four-way reversing valve 12, and a compressor 9; the combined energy storage water tank 2 is connected to the air source heat pump system 1 through the water system connecting pipeline and includes a first assembled water inlet and outlet unit 5, a standard unit 6, and a second assembled water inlet and outlet unit 7; the control valve group includes a first control valve to a ninth control valve 16-24 and a first one-way check valve to a fourth one-way check valve 25-28, all of which are installed in the water system connecting pipeline to control the switching of the cold and hot water circulation system; the water system connecting pipeline includes a first water system connecting pipeline, a second water system connecting pipeline, a first expansion pipe 14, and a second expansion pipe 15, which are used to connect the air source heat pump system 1 and the combined energy storage water tank 2, and the control valve group is installed thereon.

[0032] The water outlet of the first assembled water inlet and outlet unit 5 in the combined energy storage water tank 2 is connected to the water inlet of the standard unit 6, the water outlet of the standard unit 6 is connected to the water inlet of the second assembled water inlet and outlet unit 7. The first assembled water inlet and outlet unit 5 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4, and a water outlet structure 30. The water inlet pipe is located at the top of the heat preservation box body 3 and is connected to the water distribution structure 4. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure; the standard unit 6 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4, and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure; the second assembled water inlet and outlet unit 7 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4, and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is connected to the water outlet pipe. This structure can effectively avoid cold and hot water mixing.

[0033] To achieve the cold storage purpose of the present disclosure, such as Figure 4As shown, when the second control valve 17, the third control valve 18, the fifth control valve 20, the sixth control valve 21, and the eighth control valve 23 are opened, and the first control valve 16, the fourth control valve 19, the seventh control valve 22, and the ninth control valve 24 are closed, it is in the cold storage mode. The air source heat pump refrigeration mode and the water pump are turned on through the four-way reversing valve 12. The normal temperature water is driven by the water pump into the first heat exchanger 8 to exchange heat with the air source heat pump system 1. After absorbing heat, it enters the first assembled water inlet and outlet unit 5 of the combined energy storage water tank 2 through the eighth control valve 23, and then passes through the standard unit 6 and the second assembled water inlet and outlet unit 7, and then flows out through the second control valve 17 and the fourth one-way check valve 28 and enters the water pump suction port for circulation, so as to realize the heat storage function. In order to prevent the problem of excessive water tank pressure caused by the redundancy of the system when the water pump starts, a second expansion pipe 15 with a check valve is set for pressure balance.

[0034] Implementation Example 3 Energy Storage and Heating Mode

[0035] An assembled water tank energy storage air source heat pump cold and hot water system includes: an air source heat pump system 1, a combined energy storage water tank 2, a booster water pump 13, a control valve group, a water system connection pipeline, etc. The air source heat pump system 1 is connected to the combined energy storage water tank 2 through the water system connection pipeline, and includes a condenser (first heat exchanger) 8, an evaporator (second heat exchanger) 11, an expansion valve 10, a four-way reversing valve 12, and a compressor 9; the combined energy storage water tank 2 is connected to the air source heat pump system 1 through the water system connection pipeline and includes a first assembled water inlet and outlet unit 5, a standard unit 6, and a second assembled water inlet and outlet unit 7; the control valve group includes the first control valve to the ninth control valve 16 - 24 and the first one-way check valve to the fourth one-way check valve 25 - 28, all of which are installed in the water system connection pipeline to control the switching of the cold and hot water circulation system; the water system connection pipeline includes a first water system connection pipeline (such as Figure 3 the hot water supply pipeline shown), a second water system connection pipeline (such as Figure 4 the cold water supply pipeline shown) and a first expansion pipe 14 and a second expansion pipe 15, which are used to connect the air source heat pump system 1 and the combined energy storage water tank 2, and the control valve group is installed on them.

[0036] The outlet of the first prefabricated water inlet / outlet unit 5 in the combined energy storage water tank 2 is connected to the inlet of the standard unit 6, and the outlet of the standard unit 6 is connected to the inlet of the second prefabricated water inlet / outlet unit 7. The first prefabricated water inlet / outlet unit 5 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the top of the heat preservation box body 3 and is connected to the water distribution structure 4. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The standard unit 6 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The second prefabricated water inlet / outlet unit 7 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is connected to the water outlet pipe. This structure can effectively avoid the mixing of cold and hot water.

[0037] To achieve the purpose of energy storage and heat supply in the present disclosure, as Figure 5 shown, open the first control valve 16, the fifth control valve 20, the sixth control valve 21, the seventh control valve 22, the eighth control valve 23, and close the second control valve 17, the third control valve 18, the fourth control valve 19, and the ninth control valve 24 to enter the energy storage and heat supply mode. At this time, the air source heat pump system 1 can stop operating.

[0038] Embodiment 4 Energy storage and cooling mode

[0039] A prefabricated water tank energy storage air source heat pump cold and hot water system includes: an air source heat pump system 1, a combined energy storage water tank 2, a booster pump 13, a control valve group, a water system connection pipeline, etc. The air source heat pump system 1 is connected to the combined energy storage water tank 2 through the water system connection pipeline and includes a condenser (first heat exchanger) 8, an evaporator (second heat exchanger) 11, an expansion valve 10, a four-way reversing valve 12, and a compressor 9. The combined energy storage water tank 2 is connected to the air source heat pump system 1 through the water system connection pipeline and includes a first prefabricated water inlet / outlet unit 5, a standard unit 6, and a second prefabricated water inlet / outlet unit 7. The control valve group includes the first control valve to the ninth control valve 16 - 24 and the first check valve to the fourth check valve 25 - 28, all of which are installed in the water system connection pipeline to control the switching of the cold and hot water circulation system. The water system connection pipeline includes a first water system connection pipeline (such as Figure 3 the hot water supply pipeline shown), a second water system connection pipeline (such as Figure 4 the cold water supply pipeline shown) and a first expansion pipe 14, a second expansion pipe 15, which are used to connect the air source heat pump system 1 and the combined energy storage water tank 2, and the control valve group is installed thereon.

[0040] The water outlet of the first assembled water inlet and outlet unit 5 in the combined energy storage water tank 2 is connected to the water inlet of the standard unit 6, and the water outlet of the standard unit 6 is connected to the water inlet of the second assembled water inlet and outlet unit 7. The first assembled water inlet and outlet unit 5 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the top of the heat preservation box body 3 and is connected to the water distribution structure 4. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The standard unit 6 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The second assembled water inlet and outlet unit 7 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is connected to a water outlet pipe. This structure can effectively avoid the mixing of cold and hot water.

[0041] To achieve the purpose of energy storage and cold supply in this disclosure, as Figure 6 shown, open the second control valve 17, the third control valve 18, the fourth control valve 19, the fifth control valve 20, and the ninth control valve 24, and close the first control valve 16, the sixth control valve 21, the seventh control valve 22, and the eighth control valve 23 to enter the energy storage and cold supply mode. At this time, the air source heat pump system 1 can stop operating.

[0042] Embodiment 5 Direct heating mode

[0043] An assembled water tank energy storage air source heat pump cold and hot water system includes: an air source heat pump system 1, a combined energy storage water tank 2, a booster pump 13, a control valve group, a water system connection pipeline, etc. The air source heat pump system 1 is connected to the combined energy storage water tank 2 through a water system connection pipeline and includes a condenser (first heat exchanger) 8, an evaporator (second heat exchanger) 11, an expansion valve 10, a four-way reversing valve 12, and a compressor 9. The combined energy storage water tank 2 is connected to the air source heat pump system 1 through a water system connection pipeline and includes a first assembled water inlet and outlet unit 5, a standard unit 6, and a second assembled water inlet and outlet unit 7. The control valve group includes a first control valve to a ninth control valve 16 - 24 and a first check valve to a fourth check valve 25 - 28, all of which are installed in the water system connection pipeline to control the switching of the cold and hot water circulation system. The water system connection pipeline includes a first water system connection pipeline (such as Figure 3 the hot water supply pipeline shown) and a second water system connection pipeline (such as Figure 4The shown cold water supply pipeline) and the first expansion pipe 14 and the second expansion pipe 15, which are used to connect the air source heat pump system 1 and the combined energy storage water tank 2, and control valve groups are installed thereon.

[0044] The water outlet of the first assembled water inlet and outlet unit 5 in the combined energy storage water tank 2 is connected to the water inlet of the standard unit 6, and the water outlet of the standard unit 6 is connected to the water inlet of the second assembled water inlet and outlet unit 7. The first assembled water inlet and outlet unit 5 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the top of the heat preservation box body 3 and is connected to the water distribution structure 4. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The standard unit 6 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure. The second assembled water inlet and outlet unit 7 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4 and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is connected to the water outlet pipe. This structure can effectively avoid the mixing of cold and hot water.

[0045] To achieve the direct heating purpose of the present disclosure, as Figure 7 shown, open the first control valve 16, the second control valve 17, the third control valve 18, the fifth control valve 20, the sixth control valve 21, and close the fourth control valve 19, the seventh control valve 22, the eighth control valve 23, the ninth control valve 24 to be in the direct heating mode. Turn on the air source heat pump refrigeration mode and the water pump through the four-way reversing valve 12. The normal temperature water is driven by the water pump to enter the first heat exchanger 8 to exchange heat with the air source heat pump system 1, and then directly supply the hot water through the third control valve 18, the second control valve 17, and the first control valve 16.

[0046] Embodiment 6 Direct cooling mode

[0047] An assembled water tank energy storage air source heat pump cold and hot water system, comprising: an air source heat pump system 1, a combined energy storage water tank 2, a booster pump 13, a control valve group, a water system connecting pipeline, etc. The air source heat pump system 1 is connected to the combined energy storage water tank 2 through the water system connecting pipeline, and includes a condenser (first heat exchanger) 8, an evaporator (second heat exchanger) 11, an expansion valve 10, a four-way reversing valve 12, and a compressor 9; the combined energy storage water tank 2 is connected to the air source heat pump system 1 through the water system connecting pipeline and includes a first assembled water inlet and outlet unit 5, a standard unit 6, and a second assembled water inlet and outlet unit 7; the control valve group includes a first control valve to a ninth control valve 16-24 and a first one-way check valve to a fourth one-way check valve 25-28, all of which are installed in the water system connecting pipeline to control the switching of the cold and hot water circulation system; the water system connecting pipeline includes a first water system connecting pipeline (such as Figure 3 the hot water supply pipeline shown), a second water system connecting pipeline (such as Figure 4 the cold water supply pipeline shown), and a first expansion pipe 14 and a second expansion pipe 15, which are used to connect the air source heat pump system 1 and the combined energy storage water tank 2, and the control valve group is installed thereon.

[0048] The water outlet of the first assembled water inlet and outlet unit 5 in the combined energy storage water tank 2 is connected to the water inlet of the standard unit 6, and the water outlet of the standard unit 6 is connected to the water inlet of the second assembled water inlet and outlet unit 7. The first assembled water inlet and outlet unit 5 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4, and a water outlet structure 30. The water inlet pipe is located at the top of the heat preservation box body 3 and is connected to the water distribution structure 4. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure; the standard unit 6 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4, and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is a rectangular structure; the second assembled water inlet and outlet unit 7 includes a heat preservation box body 3, a water inlet pipe, a water distribution structure 4, and a water outlet structure 30. The water inlet pipe is located at the bottom of the heat preservation box body 3 and is connected to the water distribution structure 4 through a connecting pipe. The water outlet structure 30 is located at the bottom of the heat preservation box body 3 and is connected to the water outlet pipe. This structure can effectively avoid cold and hot water mixing.

[0049] To achieve the purpose of direct cold supply in the present disclosure, such as Figure 8As shown, open the fourth control valve 19, the fifth control valve 20, the seventh control valve 22, the eighth control valve 23, and the ninth control valve 24, and close the first control valve 16, the second control valve 17, the third control valve 18, and the sixth control valve 21 to enter the direct cooling mode. Turn on the air source heat pump refrigeration mode and the water pump through the four-way reversing valve 12. The constant temperature water is driven by the water pump to enter the first heat exchanger 8 to exchange heat with the air source heat pump system 1, and then directly supply the cold water through the seventh control valve 22, the eighth control valve 23, and the ninth control valve 24.

[0050] To further optimize the implementation effect of the present disclosure, in another implementation manner of the present disclosure, on the basis of the foregoing content, multiple combined water tank standard units can also be arranged in series to meet greater demands. In some embodiments, the standard units in the combined energy storage water tank of the present disclosure can be assembled, and the number of combined units is 1-5.

[0051] In some embodiments, the compressor in the air source heat pump system of the present disclosure can adopt a variable frequency compressor, which can adjust the operating frequency according to actual needs to achieve energy consumption optimization and stable operation of the system.

[0052] In some embodiments, the evaporator in the air source heat pump system of the present disclosure is a plate evaporator, which is composed of multiple parallel metal plates. The refrigerant and the cooled liquid flow between the metal plates for heat exchange.

[0053] In some embodiments, the combined energy storage water tank of the present disclosure has a heat preservation structure on the outside, and the heat preservation material of the heat preservation structure is aerogel, heat preservation rock wool or foam heat preservation board.

[0054] In some embodiments, the booster water pump of the present disclosure is a canned motor pump.

[0055] In some embodiments, the water distribution structure in the combined energy storage water tank of the present disclosure adopts a uniformly distributed nozzle design to ensure that the water flow is evenly distributed in the heat preservation box body and reduce the cold and heat mixing caused by the flow.

[0056] The assembled water tank energy storage air source heat pump cold and hot water system provided by the present disclosure can store heat during the low electricity price period at night and release heat during the high electricity price period during the day, thereby greatly improving the energy storage efficiency, effectively reducing the cold and heat mixing phenomenon, enabling the air source heat pump system to operate stably, and reducing the energy consumption and maintenance cost.

[0057] The above are only the preferred implementation manners of the present disclosure. It should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present disclosure, several deformations and improvements can still be made, and these all belong to the protection scope of the present disclosure.

Claims

1. An assembled water tank energy storage air source heat pump hot and cold water system, comprising: An air source heat pump system, a combined energy storage water tank, a booster water pump, a control valve group and a water system connecting pipeline, characterized in that the air source heat pump system is connected to the combined energy storage water tank through a water system connecting pipeline, and includes a first heat exchanger as a condenser, a second heat exchanger as an evaporator, an expansion valve, a four-way reversing valve and a compressor; the combined energy storage water tank is connected to the air source heat pump system through a water system connecting pipeline and includes a first assembled water inlet and outlet unit, a standard unit, and a second assembled water inlet and outlet unit; the booster water pump is installed in the water system The water inlet of the system connecting pipeline is used to provide the power required for the water system circulation; the control valve group includes the first control valve to the ninth control valve and the first one-way check valve to the fourth one-way check valve, and the control valve group is all installed in the water system connecting pipeline to perform the switching control of the hot and cold water circulation system; the water system connecting pipeline includes the first water system connecting pipeline, the second water system connecting pipeline and the first expansion pipe, the second expansion pipe, which are used to connect the air source heat pump system with the combined energy storage water tank, and the control valve group is installed on the water system connecting pipeline; Among them, the water outlet of the first assembled water inlet and outlet unit in the combined energy storage water tank is connected to the water inlet of the standard unit, and the water outlet of the standard unit is connected to the water inlet of the second assembled water inlet and outlet unit. The first assembled water inlet and outlet unit includes an insulation box, a first water inlet pipe, a first water distribution structure and a first water outlet structure. The first water inlet pipe is located at the top of the insulation box and is connected to the first water distribution structure. The first water outlet structure is located at the bottom of the insulation box and is a rectangular structure; the standard unit includes an insulation box, a second water inlet pipe, a second water distribution structure and a second water outlet structure. The second water inlet pipe is located at the bottom of the insulation box and is connected to the second water distribution structure through a connecting pipe. The second water outlet structure is located at the bottom of the insulation box and is a rectangular structure; the second assembled water inlet and outlet unit includes an insulation box, a third water inlet pipe, a third water distribution structure and a third water outlet structure. The third water inlet pipe is located at the bottom of the insulation box and is connected to the third water distribution structure through a connecting pipe. The third water outlet structure is located at the bottom of the insulation box and is connected to the water outlet pipe.

2. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: The first expansion tube and the second expansion tube of the combined energy storage water tank are respectively located at the bottom of the first assembled water inlet and outlet unit and the second assembled water inlet and outlet unit, connected to the system water inlet pipe, and pressure difference check valves are arranged in the first expansion tube and the second expansion tube.

3. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: The first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve, the eighth control valve and the ninth control valve, the first one-way check valve, the second one-way check valve, the third one-way check valve and the fourth one-way check valve in the control valve group are respectively located on different pipelines, and the pipelines are regulated by opening and closing the valves.

4. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: The compressor in the air source heat pump system adopts a variable frequency compressor.

5. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: The evaporator in the air source heat pump system is a plate evaporator, which is composed of a plurality of parallel metal plates. The refrigerant and the cooled liquid flow between the metal plates to perform heat exchange.

6. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: A thermal insulation structure is additionally provided on the outside of the combined energy storage water tank, and the thermal insulation material of the thermal insulation structure is aerogel, thermal insulation rock wool or foam thermal insulation board.

7. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: The booster water pump is a shielded pump.

8. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: By opening and closing the control valve group and switching between hot and cold of the air source heat pump system, it is possible to realize the switching of the modes of cold storage, heat storage, energy storage for cold supply, energy storage for heat supply, direct cold supply and direct heat supply. When the air source heat pump system is in cooling mode, the second control valve, the third control valve, the fifth control valve, the sixth control valve and the eighth control valve are opened, and the first control valve, the fourth control valve, the seventh control valve and the ninth control valve are closed to enter the cold storage mode; when the air source heat pump system is in heating mode, the second control valve, the fourth control valve, the fifth control valve, the seventh control valve and the eighth control valve are opened, and the first control valve, the third control valve, the sixth control valve and the ninth control valve are closed to enter the heat storage mode; the first control valve, the fifth control valve, the sixth control valve, the seventh control valve and the eighth control valve are opened, and the second control valve, the fourth control valve, the fifth control valve, the seventh control valve and the eighth control valve are closed to enter the heat storage mode. The first control valve, the second control valve, the third control valve, the fourth control valve, and the ninth control valve are in the energy storage heating mode; open the second control valve, the third control valve, the fourth control valve, the fifth control valve and the ninth control valve, and close the first control valve, the sixth control valve, the seventh control valve, and the eighth control valve for the energy storage cooling mode; when the air source heat pump system is in the heating mode, open the first control valve, the second control valve, the third control valve, the fifth control valve and the sixth control valve, and close the fourth control valve, the seventh control valve, the eighth control valve and the ninth control valve for the direct heating mode; when the air source heat pump system is in the cooling mode, open the fourth control valve, the fifth control valve, the seventh control valve, the eighth control valve and the ninth control valve, and close the first control valve, the second control valve, the third control valve and the sixth control valve for the direct cooling mode.

9. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: The water distribution structure in the combined energy storage water tank adopts a uniformly distributed nozzle design to ensure that the water flow is evenly distributed in the insulation box, thereby reducing the mixing of cold and hot caused by the flow.

10. The assembled water tank energy storage air source heat pump hot and cold water system according to claim 1, characterized in that: The standard units in the combined energy storage water tank can be assembled in an assembled manner, and the number of combined units is 1-5.

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