A dry-running air source heat pump system

Abstract

A dry heat type air source heat pump system belongs to the field of heating air conditioning. The condenser outlet and inlet of the heat pump unit are respectively communicated with the heating water supply pipeline and the water return pipeline. The evaporator outlet and inlet of the heat pump unit are respectively communicated with the intermediate water supply pipeline and the water return pipeline. The intermediate circulating pump is installed on the intermediate water return pipeline. The inlet of the surface cooler is communicated with the intermediate water supply pipeline. The outlet of the surface cooler is communicated with the intermediate water return pipeline. One end of the heat storage heat exchanger is communicated with the heating water return pipeline through the heat storage primary water supply and return pipeline. Two communication points are located between the heat pump unit and the heating circulating pump. The other end of the heat storage heat exchanger is communicated with the hot water tank through the heat storage secondary water supply and return pipeline. The defrost water supply pipeline is communicated with the outlet of the cold and hot water tanks. The defrost water return pipeline is communicated with the inlet of the cold and hot water tanks. The application realizes the cold and hot diversion of the refrigerant in the surface cooler through the increase of the defrost branch, and solves the problems of long heating time of the antifreeze, large energy consumption and large heat loss of the air heat exchanger during defrosting.

Description

Technical Field

[0001] This invention belongs to the field of heating and air conditioning, and specifically relates to a dry heat air source heat pump system. Background Technology

[0002] The invention patent application CN110793240A, published on February 14, 2020, discloses a "Large-scale Air Source Heat Pump Low-Energy Operation System and Control Method". This system achieves the split-type, long-distance installation of large-scale air source heat pumps by adding a primary antifreeze circulation. However, it does not provide an effective solution for the pressure stabilization and defrosting problems of the two-stage heat exchange air source heat pump system. Compared with conventional air source heat pump systems that select compressors based on their heat capacity and set up evaporators one-to-one, the air heat exchanger of the two-stage heat exchange air source heat pump system generally corresponds to multiple compressors at the same time. Frosting of a single heat exchanger will seriously affect the stability of the heating system. At the same time, due to the long-distance split design of the heating system, the antifreeze temperature in the primary antifreeze circulation pipeline is low and the storage is large. The heat consumed during defrosting is much greater than that consumed by conventional evaporators. In addition, the antifreeze temperature changes drastically during defrosting, and the pressure in the system rises sharply, requiring an independent pressure stabilization system to ensure system safety.

[0003] Patent application CN112747513A, published on May 4, 2021, discloses a "heat source tower heat exchange system and its defrosting control method." This method adds an independent heating device to the antifreeze circulation pipeline to heat the antifreeze in the system, defrosting the heat source tower through internal heating. This defrosting method is suitable for systems with a small total amount of antifreeze in the primary pipeline and an antifreeze temperature that is not too low. However, for large air heat exchangers installed over long distances, heating all the low-temperature refrigerant in the air heat exchanger to a higher temperature is time-consuming and energy-intensive. At the same time, the high-temperature refrigerant loses heat to the air after defrosting, resulting in a large amount of heat loss. Therefore, a new defrosting system is needed to meet the defrosting requirements of large air heat exchangers. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by providing a dry-heating air source heat pump system. The heat pump system of this invention is an air source heat pump system that uses a two-stage heat exchange process between air, antifreeze, and refrigerant. This effectively solves the problems of low single-unit heating capacity and inability to transfer heat over long distances in existing air source heat pump units, while also solving the defrosting and pressure stabilization problem of large air source surface coolers.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] Option 1: A dry-heating air source heat pump system, comprising a heat pump unit, a heating circulation pump, an intermediate circulation pump, heating water supply pipelines, heating return pipelines, intermediate water supply pipelines, intermediate return pipelines, a heat storage heat exchanger, a heat storage circulation pump, a hot water tank, a cold water tank, a defrost pump, a primary heat storage water supply pipeline, a primary heat storage water return pipeline, a secondary heat storage water supply pipeline, a secondary heat storage water return pipeline, a defrost return pipeline, a branch line of the defrost return hot water tank, a branch line of the defrost return cold water tank, a defrost water supply pipeline, a branch line of the defrost water supply hot water tank, a branch line of the defrost water supply cold water tank, a heat storage pipeline control valve, multiple defrost return branch lines, multiple surface coolers, multiple intermediate water supply branch lines, multiple intermediate return branch lines, and multiple defrost water supply branch lines;

[0007] The condenser outlet of the heat pump unit is connected to the heating water supply pipeline, and the condenser inlet is connected to the heating return water pipeline. A heating circulation pump is installed on the heating return water pipeline. The evaporator outlet of the heat pump unit is connected to the intermediate water supply pipeline, and the evaporator inlet is connected to the intermediate return water pipeline. An intermediate circulation pump is installed on the intermediate return water pipeline. Each surface cooler inlet is connected to the intermediate water supply pipeline via a corresponding intermediate water supply branch, and each surface cooler outlet is connected to the intermediate return water pipeline via a corresponding intermediate return water branch. One end of the heat storage heat exchanger is connected to the heating return water pipeline via a primary heat storage water supply pipeline and a primary heat storage water return pipeline. The two connection points are located between the heat pump unit and the heating circulation pump or before the heating circulation pump. The heating return water pipeline is located on the... A thermal storage pipeline control valve is installed between the two connection points; the other end of the thermal storage heat exchanger is connected to the hot water tank via a thermal storage secondary water supply pipeline and a thermal storage secondary water return pipeline; a thermal storage circulation pump is installed on the thermal storage secondary water supply pipeline; a defrost water supply pipeline is connected to the hot water tank outlet via a branch line of the defrost water supply hot water tank, and a defrost water supply pipeline is connected to the cold water tank outlet via a branch line of the defrost water supply cold water tank; each intermediate water supply branch line is connected to the defrost water supply pipeline via a branch line of the defrost water supply pipeline; a defrost return water pipeline is connected to the hot water tank inlet via a branch line of the defrost return water hot water tank, and a defrost return water pipeline is connected to the cold water tank inlet via a branch line of the defrost return water cold water tank; each intermediate return water branch line is connected to the defrost return water pipeline via a branch line of the defrost return water pipeline; an intermediate circulation pump is installed on the intermediate return water pipeline.

[0008] Furthermore, the heat pump system also includes a water replenishment and pressure stabilization system; the water replenishment and pressure stabilization system consists of a water replenishment pipeline, a water replenishment pump, a drain pipeline, and a pressure relief valve; one end of the water replenishment pipeline is connected to the cold water tank, and the other end of the water replenishment pipeline is connected to the intermediate return water pipeline, and the water replenishment pump is installed on the water replenishment pipeline; one end of the drain pipeline is connected to the water replenishment pipeline, and the other end of the drain pipeline is connected to the intermediate return water pipeline, the connection point between the drain pipeline and the water replenishment pipeline is between the cold water tank and the water replenishment pump, and the pressure relief valve is installed on the drain pipeline.

[0009] Option 2: A dry heat air source heat pump system, comprising a heat pump unit, a heating circulation pump, an intermediate circulation pump, heating water supply pipelines, heating return pipelines, intermediate water supply pipelines, intermediate return pipelines, a heat storage heat exchanger, a heat storage circulation pump, a hot water tank, a cold water tank, a defrost pump, a primary heat storage water supply pipeline, a primary heat storage water return pipeline, a secondary heat storage water supply pipeline, a secondary heat storage water return pipeline, a defrost return pipeline, a branch line of the defrost return hot water tank, a branch line of the defrost return cold water tank, a defrost water supply pipeline, a branch line of the defrost water supply hot water tank, a branch line of the defrost water supply cold water tank, a heat storage pipeline control valve, multiple defrost return branch lines, multiple surface coolers, multiple intermediate water supply branch lines, multiple intermediate return branch lines, and multiple defrost water supply branch lines;

[0010] The condenser outlet of the heat pump unit is connected to the heating water supply pipeline, and the condenser inlet is connected to the heating return water pipeline. A heating circulation pump is installed on the heating return water pipeline. The evaporator outlet of the heat pump unit is connected to the intermediate water supply pipeline, and the evaporator inlet is connected to the intermediate return water pipeline. An intermediate circulation pump is installed on the intermediate return water pipeline. Each surface cooler inlet is connected to the intermediate water supply pipeline via a corresponding intermediate water supply branch, and each surface cooler outlet is connected to the intermediate return water pipeline via a corresponding intermediate return water branch. One end of the thermal storage heat exchanger is connected to the heating water supply pipeline via a thermal storage primary water supply pipeline and a thermal storage primary return water pipeline. A thermal storage pipeline control device is installed on the heating water supply pipeline between the two connection points. The system includes a valve; the other end of the thermal storage heat exchanger is connected to the hot water tank via a secondary thermal storage water supply pipeline and a secondary thermal storage water return pipeline; a thermal storage circulation pump is installed on the secondary thermal storage water supply pipeline; the defrost water supply pipeline is connected to the hot water tank outlet via a branch line from the defrost water supply hot water tank, and to the cold water tank outlet via a branch line from the defrost water supply cold water tank; each intermediate water supply branch line is connected to the defrost water supply pipeline via a branch line from the defrost water supply pipeline; the defrost return water pipeline is connected to the hot water tank inlet via a branch line from the defrost return water hot water tank, and to the cold water tank inlet via a branch line from the defrost return water cold water tank; each intermediate return water branch line is connected to the defrost return water pipeline via a branch line from the defrost return water pipeline; and an intermediate circulation pump is installed on the intermediate return water pipeline.

[0011] Furthermore, the heat pump system also includes a water replenishment and pressure stabilization system; the water replenishment and pressure stabilization system consists of a water replenishment pipeline, a water replenishment pump, a drain pipeline, and a pressure relief valve; one end of the water replenishment pipeline is connected to the cold water tank, and the other end of the water replenishment pipeline is connected to the intermediate return water pipeline, and the water replenishment pump is installed on the water replenishment pipeline; one end of the drain pipeline is connected to the water replenishment pipeline, and the other end of the drain pipeline is connected to the intermediate return water pipeline, the connection point between the drain pipeline and the water replenishment pipeline is between the cold water tank and the water replenishment pump, and the pressure relief valve is installed on the drain pipeline.

[0012] Option 3: A dry heat air source heat pump system, comprising a heat pump unit, a heating circulation pump, an intermediate circulation pump, heating water supply pipelines, heating return pipelines, intermediate water supply pipelines, intermediate return pipelines, a heat storage heat exchanger, a heat storage circulation pump, a hot water tank, a cold water tank, a defrost pump, a primary heat storage water supply pipeline, a primary heat storage water return pipeline, a secondary heat storage water supply pipeline, a secondary heat storage water return pipeline, a defrost return pipeline, a branch line of the defrost return hot water tank, a branch line of the defrost return cold water tank, a defrost water supply pipeline, a branch line of the defrost water supply hot water tank, a branch line of the defrost water supply cold water tank, a heat storage pipeline control valve, multiple defrost return branch lines, multiple surface coolers, multiple intermediate water supply branch lines, multiple intermediate return branch lines, and multiple defrost water supply branch lines;

[0013] The condenser outlet of the heat pump unit is connected to the heating water supply pipeline, and the condenser inlet is connected to the heating return water pipeline. A heating circulation pump is installed on the heating return water pipeline. The evaporator outlet of the heat pump unit is connected to the intermediate water supply pipeline, and the evaporator inlet is connected to the intermediate return water pipeline. An intermediate circulation pump is installed on the intermediate return water pipeline. Each surface cooler inlet is connected to the intermediate water supply pipeline via a corresponding intermediate water supply branch line, and each surface cooler outlet is connected to the intermediate return water pipeline via a corresponding intermediate return water branch line. One end of the heat storage heat exchanger is connected to the heating return water pipeline via the primary heat storage water supply pipeline, and the other end of the heat storage heat exchanger is also connected to the heating water supply pipeline via the primary heat storage return water pipeline. The connection point between the primary heat storage water supply pipeline and the heating return water pipeline is located between the heating circulation pump and the heat pump. Between the units, the control valve for the thermal storage pipeline is installed on the primary return water pipeline of the thermal storage; the other end of the thermal storage heat exchanger is connected to the hot water tank through the secondary supply water pipeline and the secondary return water pipeline of the thermal storage, and the thermal storage circulation pump is installed on the secondary supply water pipeline of the thermal storage; the defrost supply water pipeline is connected to the outlet of the hot water tank through the branch line of the defrost supply water hot water tank, and the defrost supply water pipeline is connected to the outlet of the cold water tank through the branch line of the defrost supply water cold water tank, and each intermediate supply water branch line is connected to the defrost supply water pipeline through the branch line of the defrost supply water; the defrost return water pipeline is connected to the inlet of the hot water tank through the branch line of the defrost return water hot water tank, and the defrost return water pipeline is connected to the inlet of the cold water tank through the branch line of the defrost return water cold water tank, and each intermediate return water branch line is connected to the defrost return water pipeline through the branch line of the defrost return water; the intermediate circulation pump is installed on the intermediate return water pipeline.

[0014] Furthermore, the heat pump system also includes a water replenishment and pressure stabilization system; the water replenishment and pressure stabilization system consists of a water replenishment pipeline, a water replenishment pump, a drain pipeline, and a pressure relief valve; one end of the water replenishment pipeline is connected to the cold water tank, and the other end of the water replenishment pipeline is connected to the intermediate return water pipeline, and the water replenishment pump is installed on the water replenishment pipeline; one end of the drain pipeline is connected to the water replenishment pipeline, and the other end of the drain pipeline is connected to the intermediate return water pipeline, the connection point between the drain pipeline and the water replenishment pipeline is between the cold water tank and the water replenishment pump, and the pressure relief valve is installed on the drain pipeline.

[0015] Option 4: A dry heat air source heat pump system, comprising a heat pump unit, a heating circulation pump, an intermediate circulation pump, heating water supply pipelines, heating return pipelines, intermediate water supply pipelines, intermediate return pipelines, a heat storage heat exchanger, a heat storage circulation pump, a hot water tank, a cold water tank, a defrost pump, a primary heat storage water supply pipeline, a primary heat storage water return pipeline, a secondary heat storage water supply pipeline, a secondary heat storage water return pipeline, a defrost return pipeline, a branch line of the defrost return hot water tank, a branch line of the defrost return cold water tank, a defrost water supply pipeline, a branch line of the defrost water supply hot water tank, a branch line of the defrost water supply cold water tank, multiple defrost return branch lines, multiple surface coolers, multiple intermediate water supply branch lines, multiple intermediate return branch lines, and multiple defrost water supply branch lines, as well as heat storage pipeline control valves or heat storage circulation pumps;

[0016] The condenser outlet of the heat pump unit is connected to the heating water supply pipeline, and the condenser inlet is connected to the heating return water pipeline. A heating circulation pump is installed on the heating return water pipeline. The evaporator outlet of the heat pump unit is connected to the intermediate water supply pipeline, and the evaporator inlet is connected to the intermediate return water pipeline. An intermediate circulation pump is installed on the intermediate return water pipeline. Each surface cooler inlet is connected to the intermediate water supply pipeline via a corresponding intermediate water supply branch, and each surface cooler outlet is connected to the intermediate return water pipeline via a corresponding intermediate return water branch. One end of the thermal storage heat exchanger is connected to the heating return water pipeline via the primary thermal storage water supply pipeline and the primary thermal storage water return pipeline. A heating circulation pump is located between the two connection points. A thermal storage pipeline control device is installed on the primary thermal storage water supply pipeline. A valve or a thermal storage circulation pump is installed on the thermal storage heat exchanger. The other end of the thermal storage heat exchanger is connected to the hot water tank via a secondary thermal storage water supply pipeline and a secondary thermal storage water return pipeline. The thermal storage circulation pump is installed on the secondary thermal storage water supply pipeline. The defrost water supply pipeline is connected to the hot water tank outlet via a branch line of the defrost water supply hot water tank and to the cold water tank outlet via a branch line of the defrost water supply cold water tank. Each intermediate water supply branch line is connected to the defrost water supply pipeline via a branch line of the defrost water supply pipeline. The defrost return water pipeline is connected to the hot water tank inlet via a branch line of the defrost return water hot water tank and to the cold water tank inlet via a branch line of the defrost return water cold water tank. Each intermediate return water branch line is connected to the defrost return water pipeline via a branch line of the defrost return water pipeline. The intermediate circulation pump is installed on the intermediate return water pipeline.

[0017] Furthermore, the heat pump system also includes a water replenishment and pressure stabilization system; the water replenishment and pressure stabilization system consists of a water replenishment pipeline, a water replenishment pump, a drain pipeline, and a pressure relief valve; one end of the water replenishment pipeline is connected to the cold water tank, and the other end of the water replenishment pipeline is connected to the intermediate return water pipeline, and the water replenishment pump is installed on the water replenishment pipeline; one end of the drain pipeline is connected to the water replenishment pipeline, and the other end of the drain pipeline is connected to the intermediate return water pipeline, the connection point between the drain pipeline and the water replenishment pipeline is between the cold water tank and the water replenishment pump, and the pressure relief valve is installed on the drain pipeline.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention solves the problem of low evaporator utilization in existing air source heat pump systems under partial load by adding antifreeze circulation to the system and adopting a two-stage heat exchange method (air exchanges heat with the antifreeze in the heat exchanger through an outdoor air heat exchanger, and the antifreeze then exchanges heat with the refrigerant in the evaporator through the evaporator of the unit. In contrast, single-stage heat exchange means that the outdoor air directly exchanges heat with the refrigerant in the evaporator). At the same time, it realizes the large-scale and long-distance heat transfer of air source heat pump systems.

[0020] 2. By adding defrosting branches (including defrosting water supply control valve, defrosting water return control valve, hot water tank supply control valve, hot water tank return control valve, cold water tank supply control valve, cold water tank return control valve, defrosting pump, defrosting surface cooler, defrosting water supply hot water tank branch line, defrosting water return hot water tank branch line, defrosting water supply cold water tank branch line, defrosting water return cold water tank branch line, defrosting water return pipeline, defrosting water supply pipeline, defrosting water supply branch line, defrosting water return branch line, cold water tank, and hot water tank), the hot and cold refrigerant in the surface cooler is separated, which solves the problems of long heating time, high energy consumption, and large heat loss when defrosting the air heat exchanger. At the same time, it realizes group defrosting of the surface cooler, which significantly reduces the impact of defrosting on terminal heating.

[0021] 3. By adding a water replenishment pump and a pressure relief valve to the main circulation pipeline (i.e., the heating circulation pipeline, including the intermediate water supply pipeline and the intermediate return pipeline), the problem of rapid pressure fluctuations in the antifreeze circulation system before and after defrosting is solved, thus improving the safety and stability of the system. (When the system pressure drops after defrosting or cooling, antifreeze is drawn from the cold water tank and pressurized to the heating circulation pipeline through the intermediate return pipeline. When the system temperature rises and the pressure in the intermediate return pipeline becomes too high, some refrigerant is discharged into the cold water tank through the pressure relief valve to relieve pressure in the heating circulation pipeline, provided that some refrigerant is stored in the cold water tank.) Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the dry heat air source heat pump system of the present invention;

[0023] Figure 2 This is a structural schematic diagram of a third specific embodiment of the system of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of a second specific embodiment of the system of the present invention;

[0025] Figure 4 This is a structural schematic diagram of the fourth specific embodiment of the system of the present invention;

[0026] Figure 5 This is a structural schematic diagram of the fifth specific embodiment of the system of the present invention;

[0027] Figure 6This is a structural schematic diagram of a specific embodiment six of the system of the present invention;

[0028] Figure 7 This is a structural schematic diagram of the seventh specific embodiment of the system of the present invention.

[0029] The component names and reference numerals in the above figures are as follows:

[0030] Surface cooler 1, heat pump unit 2, condenser 2-1, evaporator 2-2, heating circulation pump 3, intermediate circulation pump 4, heating water supply pipeline 5, heating water return pipeline 6, intermediate water supply pipeline 7, intermediate water return pipeline 8, thermal storage heat exchanger 9, thermal storage circulation pump 10, hot water tank 11, cold water tank 12, defrost pump 13, primary thermal storage water supply pipeline 14, primary thermal storage water return pipeline 15, secondary thermal storage water supply pipeline 16, secondary thermal storage water return pipeline 17, defrost water return pipeline 18, defrost water supply pipeline 19, intermediate water supply branch line 7-1, intermediate water return branch line 8-1, defrost water supply hot water tank branch line 19 -1. Defrost water supply cold water tank branch line 19-2. Defrost return water hot water tank branch line 18-1. Defrost return water cold water tank branch line 18-2. Defrost water supply branch line 19-3. Defrost return water branch line 18-3. Intermediate main water supply control valve 20. Intermediate main return water control valve 21. Defrost water supply control valve 22. Defrost return water control valve 23. Hot water tank supply control valve 24. Hot water tank return water control valve 25. Cold water tank supply control valve 26. Cold water tank return water control valve 27. Thermal storage pipeline control valve 28. Thermal storage circulation pump 29. Water supply pipeline 30. Water supply pump 31. Drain pipeline 32. Pressure relief valve 33. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Specific implementation method one: as follows Figure 1As shown, this embodiment discloses a dry heat air source heat pump system, including a heat pump unit 2, a heating circulation pump 3, an intermediate circulation pump 4, a heating water supply pipeline 5, a heating return water pipeline 6, an intermediate water supply pipeline 7, an intermediate return water pipeline 8, a heat storage heat exchanger 9, a heat storage circulation pump 10, a hot water tank 11, a cold water tank 12, a defrost pump 13, a primary heat storage water supply pipeline 14, a primary heat storage water return pipeline 15, a secondary heat storage water supply pipeline 16, a secondary heat storage water return pipeline 17, a defrost return water pipeline 18, a branch line 18-1 for the defrost return water hot water tank, a branch line 18-2 for the defrost return water cold water tank, and a defrost supply... Water pipeline 19, Defrosting water supply hot water tank branch line 19-1, Defrosting water supply cold water tank branch line 19-2, Hot water tank supply control valve 24, Hot water tank return water control valve 25, Cold water tank supply control valve 26, Cold water tank return water control valve 27, Thermal storage pipeline control valve 28, Multiple intermediate main water supply control valves 20, Multiple intermediate main return water control valves 21, Multiple defrosting water supply control valves 22, Multiple defrosting return water control valves 23, Multiple defrosting return water branch lines 18-3, Multiple surface coolers 1, Multiple intermediate water supply branch lines 7-1, Multiple intermediate return water branch lines 8-1, Multiple defrosting water supply branch lines 19-3;

[0033] The outlet of the condenser 2-1 of the heat pump unit 2 is connected to the heating water supply pipeline 5, and the inlet of the condenser 2-1 is connected to the heating return water pipeline 6. The heating circulation pump 3 is installed on the heating return water pipeline 6. The outlet of the evaporator 2-2 of the heat pump unit 2 is connected to the intermediate water supply pipeline 7, and the inlet of the evaporator 2-2 is connected to the intermediate return water pipeline 8. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8. The inlet of each surface cooler 1 is connected to the intermediate water supply pipeline 7 through a corresponding intermediate water supply branch 7-1, and the outlet of each surface cooler 1 is connected to the intermediate return water pipeline 7 through a corresponding intermediate return water branch 7-1. Line 8-1 is connected to the intermediate return water pipeline 8. One end of the thermal storage heat exchanger 9 is connected to the heating return water pipeline 6 via the thermal storage primary water supply pipeline 14 and the thermal storage primary water return pipeline 15 (one end of the thermal storage heat exchanger 9 is provided with a first inlet and a first outlet; the first inlet is connected to the thermal storage primary water supply pipeline 14, and the first outlet is connected to the thermal storage primary water return pipeline 15). The two connection points between the thermal storage primary water supply pipeline 14 and the thermal storage primary water return pipeline 15 and the heating return water pipeline 6 are located between the heat pump unit 2 and the heating circulation pump 3; the heating return water pipeline 6 is located at the two connection points. A thermal storage pipeline control valve 28 is installed between the connection points; the other end of the thermal storage heat exchanger 9 is connected to the hot water tank 11 through the thermal storage secondary water supply pipeline 16 and the thermal storage secondary water return pipeline 17 (the other end of the thermal storage heat exchanger 9 is provided with a second inlet and a second outlet, the thermal storage secondary water supply pipeline 16 is connected to the second inlet, and the thermal storage secondary water return pipeline 17 is connected to the second outlet), and the thermal storage circulation pump 10 is installed on the thermal storage secondary water supply pipeline 16; the defrost water supply pipeline 19 is connected to the outlet of the hot water tank 11 through the defrost water supply hot water tank branch line 19-1, and the defrost water supply pipeline 19 is connected to the outlet of the hot water tank 11 through the branch line 19-1. The branch line 19-2 of the defrost water supply cold water tank is connected to the outlet of the cold water tank 12. Each intermediate water supply branch line 7-1 is connected to the defrost water supply pipeline 19 via the defrost water supply branch line 19-3. The defrost return water pipeline 18 is connected to the inlet of the hot water tank 11 via the defrost return water hot water tank branch line 18-1. The defrost return water pipeline 18 is connected to the inlet of the cold water tank 12 via the defrost return water cold water tank branch line 18-2. Each intermediate return water branch line 8-1 is connected to the defrost return water pipeline 18 via the defrost return water branch line 18-3. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8.

[0034] Each intermediate water supply branch 7-1 is equipped with an intermediate main water supply control valve 20; each intermediate return water branch 8-1 is equipped with an intermediate main return water control valve 21; each defrost water supply branch 19-3 is equipped with a defrost water supply control valve 22; each defrost return water branch 18-3 is equipped with a defrost return water control valve 23; the defrost water supply hot water tank branch 19-1 is equipped with a hot water tank supply control valve 24; the defrost return water hot water tank branch 18-1 is equipped with a hot water tank return water control valve 25; the defrost water supply cold water tank branch 19-2 is equipped with a cold water tank supply control valve 26; and the defrost return water cold water tank branch 18-2 is equipped with a cold water tank return water control valve 27.

[0035] Specific implementation method two: such as Figure 3 As shown, this embodiment discloses a dry heat air source heat pump system, including a heat pump unit 2, a heating circulation pump 3, an intermediate circulation pump 4, a heating water supply pipeline 5, a heating return water pipeline 6, an intermediate water supply pipeline 7, an intermediate return water pipeline 8, a heat storage heat exchanger 9, a heat storage circulation pump 10, a hot water tank 11, a cold water tank 12, a defrost pump 13, a primary heat storage water supply pipeline 14, a primary heat storage water return pipeline 15, a secondary heat storage water supply pipeline 16, a secondary heat storage water return pipeline 17, a defrost return water pipeline 18, a branch line 18-1 for the defrost return water hot water tank, a branch line 18-2 for the defrost return water cold water tank, and a defrost supply... Water pipeline 19, Defrosting water supply hot water tank branch line 19-1, Defrosting water supply cold water tank branch line 19-2, Hot water tank supply control valve 24, Hot water tank return water control valve 25, Cold water tank supply control valve 26, Cold water tank return water control valve 27, Thermal storage pipeline control valve 28, Multiple intermediate main water supply control valves 20, Multiple intermediate main return water control valves 21, Multiple defrosting water supply control valves 22, Multiple defrosting return water control valves 23, Multiple defrosting return water branch lines 18-3, Multiple surface coolers 1, Multiple intermediate water supply branch lines 7-1, Multiple intermediate return water branch lines 8-1, Multiple defrosting water supply branch lines 19-3;

[0036] The outlet of the condenser 2-1 of the heat pump unit 2 is connected to the heating water supply pipeline 5, and the inlet of the condenser 2-1 is connected to the heating return water pipeline 6. The heating circulation pump 3 is installed on the heating return water pipeline 6. The outlet of the evaporator 2-2 of the heat pump unit 2 is connected to the intermediate water supply pipeline 7, and the inlet of the evaporator 2-2 is connected to the intermediate return water pipeline 8. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8. The inlet of each surface cooler 1 is connected to the intermediate water supply pipeline 7 through a corresponding intermediate water supply branch 7-1, and the outlet of each surface cooler 1 is connected to the intermediate return water pipeline 7 through a corresponding intermediate return water branch 7-1. Water branch line 8-1 is connected to intermediate return water line 8. One end of the thermal storage heat exchanger 9 is connected to the heating return water line 6 via thermal storage primary water supply line 14 and thermal storage primary water return line 15 (one end of the thermal storage heat exchanger 9 is provided with a first inlet and a first outlet; the first inlet is connected to thermal storage primary water supply line 14, and the first outlet is connected to thermal storage primary water return line 15). The two connection points between thermal storage primary water supply line 14 and thermal storage primary water return line 15 and the heating return water line 6 are located before the heating circulation pump 3; the heating return water line 6 is located between the two connection points. A thermal storage pipeline control valve 28 is installed in the middle; the other end of the thermal storage heat exchanger 9 is connected to the hot water tank 11 through the thermal storage secondary water supply pipeline 16 and the thermal storage secondary water return pipeline 17 (the other end of the thermal storage heat exchanger 9 is provided with a second inlet and a second outlet, the thermal storage secondary water supply pipeline 16 is connected to the second inlet, and the thermal storage secondary water return pipeline 17 is connected to the second outlet), and the thermal storage circulation pump 10 is installed on the thermal storage secondary water supply pipeline 16; the defrost water supply pipeline 19 is connected to the outlet of the hot water tank 11 through the defrost water supply hot water tank branch line 19-1, and the defrost water supply pipeline 19 is connected to the outlet of the hot water tank 11 through the branch line 19-1. The defrost water supply cold water tank branch line 19-2 is connected to the outlet of the cold water tank 12. Each intermediate water supply branch line 7-1 is connected to the defrost water supply pipeline 19 via the defrost water supply branch line 19-3. The defrost return water pipeline 18 is connected to the inlet of the hot water tank 11 via the defrost return water hot water tank branch line 18-1. The defrost return water pipeline 18 is connected to the inlet of the cold water tank 12 via the defrost return water cold water tank branch line 18-2. Each intermediate return water branch line 8-1 is connected to the defrost return water pipeline 18 via the defrost return water branch line 18-3. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8.

[0037] Each intermediate water supply branch 7-1 is equipped with an intermediate main water supply control valve 20; each intermediate return water branch 8-1 is equipped with an intermediate main return water control valve 21; each defrost water supply branch 19-3 is equipped with a defrost water supply control valve 22; each defrost return water branch 18-3 is equipped with a defrost return water control valve 23; the defrost water supply hot water tank branch 19-1 is equipped with a hot water tank supply control valve 24; the defrost return water hot water tank branch 18-1 is equipped with a hot water tank return water control valve 25; the defrost water supply cold water tank branch 19-2 is equipped with a cold water tank supply control valve 26; and the defrost return water cold water tank branch 18-2 is equipped with a cold water tank return water control valve 27.

[0038] Specific implementation method three: such as Figure 2 As shown, this embodiment discloses a dry heat air source heat pump system, including a heat pump unit 2, a heating circulation pump 3, an intermediate circulation pump 4, a heating water supply pipeline 5, a heating return water pipeline 6, an intermediate water supply pipeline 7, an intermediate return water pipeline 8, a heat storage heat exchanger 9, a heat storage circulation pump 10, a hot water tank 11, a cold water tank 12, a defrost pump 13, a primary heat storage water supply pipeline 14, a primary heat storage water return pipeline 15, a secondary heat storage water supply pipeline 16, a secondary heat storage water return pipeline 17, a defrost return water pipeline 18, a branch line 18-1 for the defrost return water hot water tank, a branch line 18-2 for the defrost return water cold water tank, and a defrost supply... Water pipeline 19, Defrosting water supply hot water tank branch line 19-1, Defrosting water supply cold water tank branch line 19-2, Hot water tank supply control valve 24, Hot water tank return water control valve 25, Cold water tank supply control valve 26, Cold water tank return water control valve 27, Thermal storage pipeline control valve 28, Multiple intermediate main water supply control valves 20, Multiple intermediate main return water control valves 21, Multiple defrosting water supply control valves 22, Multiple defrosting return water control valves 23, Multiple defrosting return water branch lines 18-3, Multiple surface coolers 1, Multiple intermediate water supply branch lines 7-1, Multiple intermediate return water branch lines 8-1, Multiple defrosting water supply branch lines 19-3;

[0039] The outlet of the condenser 2-1 of the heat pump unit 2 is connected to the heating water supply pipeline 5, and the inlet of the condenser 2-1 is connected to the heating return water pipeline 6. The heating circulation pump 3 is installed on the heating return water pipeline 6. The outlet of the evaporator 2-2 of the heat pump unit 2 is connected to the intermediate water supply pipeline 7, and the inlet of the evaporator 2-2 is connected to the intermediate return water pipeline 8. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8. The inlet of each surface cooler 1 is connected to the intermediate water supply pipeline 7 through a corresponding intermediate water supply branch 7-1. The outlets are all connected to the intermediate return water pipeline 8 via corresponding intermediate return water branch lines 8-1. One end of the thermal storage heat exchanger 9 is connected to the heating water supply pipeline 5 via the primary thermal storage water supply pipeline 14 and the primary thermal storage water return pipeline 15 (one end of the thermal storage heat exchanger 9 is provided with a first inlet and a first outlet; the first inlet is connected to the primary thermal storage water supply pipeline 14, and the first outlet is connected to the primary thermal storage water return pipeline 15). A thermal storage pipeline control valve 28 is installed on the heating water supply pipeline 5 between the two connection points; the other end of the thermal storage heat exchanger 9... The thermal storage secondary water supply pipeline 16 and the thermal storage secondary water return pipeline 17 are connected to the hot water tank 11 (the other end of the thermal storage heat exchanger 9 is provided with a second inlet and a second outlet; the thermal storage secondary water supply pipeline 16 is connected to the second inlet, and the thermal storage secondary water return pipeline 17 is connected to the second outlet). The thermal storage circulation pump 10 is installed on the thermal storage secondary water supply pipeline 16; the defrost water supply pipeline 19 is connected to the outlet of the hot water tank 11 through the defrost water supply hot water tank branch line 19-1, and the defrost water supply pipeline 19 is connected to the outlet of the cold water tank branch line 19-1. 2 is connected to the outlet of cold water tank 12. Each intermediate water supply branch 7-1 is connected to the defrost water supply line 19 via the defrost water supply branch 19-3. The defrost return water line 18 is connected to the inlet of hot water tank 11 via the defrost return water hot water tank branch 18-1. The defrost return water line 18 is connected to the inlet of cold water tank 12 via the defrost return water cold water tank branch 18-2. Each intermediate return water branch 8-1 is connected to the defrost return water line 18 via the defrost return water branch 18-3. The intermediate circulation pump 4 is installed on the intermediate return water line 8.

[0040] Each intermediate water supply branch 7-1 is equipped with an intermediate main water supply control valve 20; each intermediate return water branch 8-1 is equipped with an intermediate main return water control valve 21; each defrost water supply branch 19-3 is equipped with a defrost water supply control valve 22; each defrost return water branch 18-3 is equipped with a defrost return water control valve 23; the defrost water supply hot water tank branch 19-1 is equipped with a hot water tank supply control valve 24; the defrost return water hot water tank branch 18-1 is equipped with a hot water tank return water control valve 25; the defrost water supply cold water tank branch 19-2 is equipped with a cold water tank supply control valve 26; and the defrost return water cold water tank branch 18-2 is equipped with a cold water tank return water control valve 27.

[0041] Specific implementation method four: such as Figure 4As shown, this embodiment discloses a dry heat air source heat pump system, including a heat pump unit 2, a heating circulation pump 3, an intermediate circulation pump 4, a heating water supply pipeline 5, a heating return water pipeline 6, an intermediate water supply pipeline 7, an intermediate return water pipeline 8, a heat storage heat exchanger 9, a heat storage circulation pump 10, a hot water tank 11, a cold water tank 12, a defrost pump 13, a primary heat storage water supply pipeline 14, a primary heat storage water return pipeline 15, a secondary heat storage water supply pipeline 16, a secondary heat storage water return pipeline 17, a defrost return water pipeline 18, a branch line 18-1 for the defrost return water hot water tank, a branch line 18-2 for the defrost return water cold water tank, and a defrost supply... Water pipeline 19, Defrosting water supply hot water tank branch line 19-1, Defrosting water supply cold water tank branch line 19-2, Hot water tank supply control valve 24, Hot water tank return water control valve 25, Cold water tank supply control valve 26, Cold water tank return water control valve 27, Thermal storage pipeline control valve 28, Multiple intermediate main water supply control valves 20, Multiple intermediate main return water control valves 21, Multiple defrosting water supply control valves 22, Multiple defrosting return water control valves 23, Multiple defrosting return water branch lines 18-3, Multiple surface coolers 1, Multiple intermediate water supply branch lines 7-1, Multiple intermediate return water branch lines 8-1, Multiple defrosting water supply branch lines 19-3;

[0042] The outlet of the condenser 2-1 of the heat pump unit 2 is connected to the heating water supply pipeline 5, and the inlet of the condenser 2-1 is connected to the heating return water pipeline 6. The heating circulation pump 3 is installed on the heating return water pipeline 6. The outlet of the evaporator 2-2 of the heat pump unit 2 is connected to the intermediate water supply pipeline 7, and the inlet of the evaporator 2-2 is connected to the intermediate return water pipeline 8. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8. The inlet of each surface cooler 1 is connected to the intermediate water supply pipeline 7 through a corresponding intermediate water supply branch 7-1, and the outlet of each surface cooler 1 is connected to the intermediate return water pipeline 7 through a corresponding intermediate return water branch 7-1. Line 8-1 is connected to the intermediate return water pipeline 8. One end of the heat storage heat exchanger 9 is connected to the heat supply return water pipeline 6 via the primary heat storage water supply pipeline 14. The other end of the heat storage heat exchanger 9 is also connected to the heat supply water pipeline 5 via the primary heat storage return water pipeline 15 (one end of the heat storage heat exchanger 9 has a first inlet and a first outlet; the first inlet is connected to the primary heat storage water supply pipeline 14, and the first outlet is connected to the primary heat storage return water pipeline 15). The connection point between the primary heat storage water supply pipeline 14 and the heat supply return water pipeline 6 is located between the heating circulation pump 3 and the heat pump unit 2. The heat storage pipeline control valve... 28 is installed on the primary return water pipeline 15 of the thermal storage system; the other end of the thermal storage heat exchanger 9 is connected to the hot water tank 11 through the secondary supply water pipeline 16 and the secondary return water pipeline 17 (the other end of the thermal storage heat exchanger 9 is provided with a second inlet and a second outlet, the secondary supply water pipeline 16 is connected to the second inlet, and the secondary return water pipeline 17 is connected to the second outlet), the thermal storage circulation pump 10 is installed on the secondary supply water pipeline 16; the defrost supply water pipeline 19 is connected to the outlet of the hot water tank 11 through the defrost supply water hot water tank branch line 19-1, and the defrost supply water pipeline 19 is connected to... The branch line 19-2 of the defrost water supply cold water tank is connected to the outlet of the cold water tank 12. Each intermediate water supply branch line 7-1 is connected to the defrost water supply pipeline 19 via the defrost water supply branch line 19-3. The defrost return water pipeline 18 is connected to the inlet of the hot water tank 11 via the defrost return water hot water tank branch line 18-1. The defrost return water pipeline 18 is connected to the inlet of the cold water tank 12 via the defrost return water cold water tank branch line 18-2. Each intermediate return water branch line 8-1 is connected to the defrost return water pipeline 18 via the defrost return water branch line 18-3. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8.

[0043] Each intermediate water supply branch 7-1 is equipped with an intermediate main water supply control valve 20; each intermediate return water branch 8-1 is equipped with an intermediate main return water control valve 21; each defrost water supply branch 19-3 is equipped with a defrost water supply control valve 22; each defrost return water branch 18-3 is equipped with a defrost return water control valve 23; the defrost water supply hot water tank branch 19-1 is equipped with a hot water tank supply control valve 24; the defrost return water hot water tank branch 18-1 is equipped with a hot water tank return water control valve 25; the defrost water supply cold water tank branch 19-2 is equipped with a cold water tank supply control valve 26; and the defrost return water cold water tank branch 18-2 is equipped with a cold water tank return water control valve 27.

[0044] Specific implementation method five: such as Figure 5 As shown, this embodiment discloses a dry heat air source heat pump system, including a heat pump unit 2, a heating circulation pump 3, an intermediate circulation pump 4, a heating water supply pipeline 5, a heating return water pipeline 6, an intermediate water supply pipeline 7, an intermediate return water pipeline 8, a heat storage heat exchanger 9, a heat storage circulation pump 10, a hot water tank 11, a cold water tank 12, a defrost pump 13, a primary heat storage water supply pipeline 14, a primary heat storage water return pipeline 15, a secondary heat storage water supply pipeline 16, a secondary heat storage water return pipeline 17, a defrost return water pipeline 18, a branch line 18-1 for the defrost return water hot water tank, a branch line 18-2 for the defrost return water cold water tank, and a defrost supply... Water pipeline 19, defrost water supply hot water tank branch line 19-1, defrost water supply cold water tank branch line 19-2, hot water tank supply control valve 24, hot water tank return water control valve 25, cold water tank supply control valve 26, cold water tank return water control valve 27, multiple intermediate main water supply control valves 20, multiple intermediate main return water control valves 21, multiple defrost water supply control valves 22, multiple defrost return water control valves 23, multiple defrost return water branch lines 18-3, multiple surface coolers 1, multiple intermediate water supply branch lines 7-1, multiple intermediate return water branch lines 8-1, multiple defrost water supply branch lines 19-3, and heat storage pipeline control valve 28;

[0045] The outlet of the condenser 2-1 of the heat pump unit 2 is connected to the heating water supply pipeline 5, and the inlet of the condenser 2-1 is connected to the heating return water pipeline 6. The heating circulation pump 3 is installed on the heating return water pipeline 6. The outlet of the evaporator 2-2 of the heat pump unit 2 is connected to the intermediate water supply pipeline 7, and the inlet of the evaporator 2-2 is connected to the intermediate return water pipeline 8. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8. The inlet of each surface cooler 1 is connected to the intermediate water supply pipeline 7 through a corresponding intermediate water supply branch 7-1, and the outlet of each surface cooler 1... All are connected to the intermediate return water pipeline 8 via the corresponding intermediate return water branch line 8-1. One end of the thermal storage heat exchanger 9 is connected to the heating return water pipeline 6 via the primary thermal storage water supply pipeline 14 and the primary thermal storage water return pipeline 15 (one end of the thermal storage heat exchanger 9 is provided with a first inlet and a first outlet; the first inlet is connected to the primary thermal storage water supply pipeline 14, and the first outlet is connected to the primary thermal storage water return pipeline 15). The heating circulation pump 3 is located between the two connection points. A thermal storage pipeline control valve 28 is installed on the primary thermal storage water supply pipeline 14; thermal storage heat exchange The other end of the heat exchanger 9 is connected to the hot water tank 11 via the secondary heat storage water supply pipeline 16 and the secondary heat storage water return pipeline 17 (the other end of the heat exchanger 9 is provided with a second inlet and a second outlet; the secondary heat storage water supply pipeline 16 is connected to the second inlet, and the secondary heat storage water return pipeline 17 is connected to the second outlet). The heat storage circulation pump 10 is installed on the secondary heat storage water supply pipeline 16. The defrost water supply pipeline 19 is connected to the outlet of the hot water tank 11 via the defrost water supply hot water tank branch line 19-1, and the defrost water supply pipeline 19 is connected to the defrost water supply cold water tank branch line. 19-2 is connected to the outlet of cold water tank 12. Each intermediate water supply branch 7-1 is connected to the defrost water supply line 19 via the defrost water supply branch 19-3. The defrost return water line 18 is connected to the inlet of hot water tank 11 via the defrost return water hot water tank branch 18-1. The defrost return water line 18 is connected to the inlet of cold water tank 12 via the defrost return water cold water tank branch 18-2. Each intermediate return water branch 8-1 is connected to the defrost return water line 18 via the defrost return water branch 18-3. The intermediate circulation pump 4 is installed on the intermediate return water line 8.

[0046] Each intermediate water supply branch 7-1 is equipped with an intermediate main water supply control valve 20; each intermediate return water branch 8-1 is equipped with an intermediate main return water control valve 21; each defrost water supply branch 19-3 is equipped with a defrost water supply control valve 22; each defrost return water branch 18-3 is equipped with a defrost return water control valve 23; the defrost water supply hot water tank branch 19-1 is equipped with a hot water tank supply control valve 24; the defrost return water hot water tank branch 18-1 is equipped with a hot water tank return water control valve 25; the defrost water supply cold water tank branch 19-2 is equipped with a cold water tank supply control valve 26; and the defrost return water cold water tank branch 18-2 is equipped with a cold water tank return water control valve 27.

[0047] Specific implementation method six: such as Figure 6As shown, this embodiment discloses a dry heat air source heat pump system, including a heat pump unit 2, a heating circulation pump 3, an intermediate circulation pump 4, a heating water supply pipeline 5, a heating return water pipeline 6, an intermediate water supply pipeline 7, an intermediate return water pipeline 8, a heat storage heat exchanger 9, a heat storage circulation pump 10, a hot water tank 11, a cold water tank 12, a defrost pump 13, a primary heat storage water supply pipeline 14, a primary heat storage water return pipeline 15, a secondary heat storage water supply pipeline 16, a secondary heat storage water return pipeline 17, a defrost return water pipeline 18, a branch line 18-1 for the defrost return water hot water tank, a branch line 18-2 for the defrost return water cold water tank, and a defrost... Water supply line 19, defrost water supply hot water tank branch line 19-1, defrost water supply cold water tank branch line 19-2, hot water tank supply control valve 24, hot water tank return water control valve 25, cold water tank supply control valve 26, cold water tank return water control valve 27, multiple intermediate main water supply control valves 20, multiple intermediate main return water control valves 21, multiple defrost water supply control valves 22, multiple defrost return water control valves 23, multiple defrost return water branch lines 18-3, multiple surface coolers 1, multiple intermediate water supply branch lines 7-1, multiple intermediate return water branch lines 8-1 and multiple defrost water supply branch lines 19-3, and thermal storage circulation pump 29;

[0048] The outlet of the condenser 2-1 of the heat pump unit 2 is connected to the heating water supply pipeline 5, and the inlet of the condenser 2-1 is connected to the heating return water pipeline 6. The heating circulation pump 3 is installed on the heating return water pipeline 6. The outlet of the evaporator 2-2 of the heat pump unit 2 is connected to the intermediate water supply pipeline 7, and the inlet of the evaporator 2-2 is connected to the intermediate return water pipeline 8. The intermediate circulation pump 4 is installed on the intermediate return water pipeline 8. The inlet of each surface cooler 1 is connected to the intermediate water supply pipeline 7 through a corresponding intermediate water supply branch 7-1. The outlet of each surface cooler 1... All outlets are connected to the intermediate return water pipeline 8 via corresponding intermediate return water branch lines 8-1. One end of the thermal storage heat exchanger 9 is connected to the heating return water pipeline 6 via the primary thermal storage water supply pipeline 14 and the primary thermal storage water return pipeline 15 (one end of the thermal storage heat exchanger 9 is provided with a first inlet and a first outlet; the first inlet is connected to the primary thermal storage water supply pipeline 14, and the first outlet is connected to the primary thermal storage water return pipeline 15). The heating circulation pump 3 is located between the two connection points, and a thermal storage circulation pump 29 is installed on the primary thermal storage water supply pipeline 14; thermal storage heat exchanger The other end of the heat exchanger 9 is connected to the hot water tank 11 via the secondary heat storage water supply pipeline 16 and the secondary heat storage water return pipeline 17 (the other end of the heat exchanger 9 is provided with a second inlet and a second outlet; the secondary heat storage water supply pipeline 16 is connected to the second inlet, and the secondary heat storage water return pipeline 17 is connected to the second outlet). The heat storage circulation pump 10 is installed on the secondary heat storage water supply pipeline 16. The defrost water supply pipeline 19 is connected to the outlet of the hot water tank 11 via the defrost water supply hot water tank branch line 19-1, and the defrost water supply pipeline 19 is connected to the outlet of the cold water tank branch line 19-1. 9-2 is connected to the outlet of cold water tank 12. Each intermediate water supply branch 7-1 is connected to the defrost water supply line 19 via the defrost water supply branch 19-3. The defrost return water line 18 is connected to the inlet of hot water tank 11 via the defrost return water hot water tank branch 18-1. The defrost return water line 18 is connected to the inlet of cold water tank 12 via the defrost return water cold water tank branch 18-2. Each intermediate return water branch 8-1 is connected to the defrost return water line 18 via the defrost return water branch 18-3. The intermediate circulation pump 4 is installed on the intermediate return water line 8.

[0049] Each intermediate water supply branch 7-1 is equipped with an intermediate main water supply control valve 20; each intermediate return water branch 8-1 is equipped with an intermediate main return water control valve 21; each defrost water supply branch 19-3 is equipped with a defrost water supply control valve 22; each defrost return water branch 18-3 is equipped with a defrost return water control valve 23; the defrost water supply hot water tank branch 19-1 is equipped with a hot water tank supply control valve 24; the defrost return water hot water tank branch 18-1 is equipped with a hot water tank return water control valve 25; the defrost water supply cold water tank branch 19-2 is equipped with a cold water tank supply control valve 26; and the defrost return water cold water tank branch 18-2 is equipped with a cold water tank return water control valve 27.

[0050] The difference between specific implementation methods one to six is ​​that the heat storage temperature of the hot water tank is changed (for example, the temperature is higher when connected from the heating supply water pipeline 5 than when connected from the heating return water pipeline 6) and the installation position of the heating circulation pump 3.

[0051] Specific implementation method seven: such as Figure 7 As shown, this embodiment is a further explanation of any one of the specific embodiments one to six. The heat pump system also includes a water replenishment and pressure stabilization system. The water replenishment and pressure stabilization system consists of a water replenishment pipeline 30, a water replenishment pump 31, a drain pipeline 32, and a pressure relief valve 33. One end of the water replenishment pipeline 30 is connected to the cold water tank 12, and the other end of the water replenishment pipeline 30 is connected to the intermediate return water pipeline 8. The water replenishment pump 31 is installed on the water replenishment pipeline 30. One end of the drain pipeline 32 is connected to the water replenishment pipeline 30, and the other end of the drain pipeline 32 is connected to the intermediate return water pipeline 8. The connection point between the drain pipeline 32 and the water replenishment pipeline 30 is between the cold water tank 12 and the water replenishment pump 31. The pressure relief valve 33 is installed on the drain pipeline 32.

[0052] The operating principle of this invention is as follows:

[0053] Heating process: The intermediate circulation pump 4 drives the antifreeze to flow in the loop consisting of the intermediate water supply line 7, the intermediate return line 8, the heat pump unit 2, and multiple surface coolers 1. The low-temperature antifreeze flowing out of the evaporator 2-2 of the heat pump unit 2 through the intermediate water supply line 7 takes heat from the outdoor air through the surface coolers 1 and is heated. The heated antifreeze flows back to the evaporator 2-2 through the intermediate return line 8, transferring heat to the refrigerant in the heat pump unit 2 and then cooling down again, completing one heat exchange cycle. The high-temperature water flowing out of the condenser 2-1 of the heat pump unit 2 is driven by the heating circulation pump 3 and flows through the heating water supply line 5 to the end heat-using unit. After sufficient heat exchange, it flows back to the condenser 2-1 through the heating return line 6, completing one heating cycle.

[0054] Thermal storage process: Under the diversion action of thermal storage pipeline control valve 28, the hot water returning from the heating return water pipeline 6 flows into the thermal storage heat exchanger 9 through the primary thermal storage water supply pipeline 14. It exchanges heat with the antifreeze that flows from the hot water tank 11 into the thermal storage heat exchanger 9 through the secondary thermal storage water supply pipeline 16 driven by the thermal storage circulation pump 10. The hot water after heat exchange flows back to the heating return water pipeline 6 through the primary thermal storage return water pipeline 15. The heated antifreeze flows back to the hot water tank 11 through the secondary thermal storage return water pipeline 17, completing one thermal storage cycle. When the temperature of the antifreeze in the hot water tank 11 reaches the set temperature, the thermal storage circulation pump 10 is turned off.

[0055] Defrosting process: When frost forms on the surface of a certain surface cooler 1, affecting heat exchange, the intermediate main water supply control valve 20 and intermediate main water return control valve 21 corresponding to surface cooler 1 are closed, while the defrost water supply control valve 22 and defrost water return control valve 23 corresponding to surface cooler 1 are opened, and the hot water tank supply control valve 24 and cold water tank return control valve 27 are opened. The defrost pump 13 is started, and the high-temperature antifreeze in the hot water tank 11 flows into the defrost surface cooler 1, pushing the original low-temperature antifreeze in surface cooler 1 into the cold water tank 12; when all the low-temperature antifreeze in surface cooler 1 is used up... After entering the cold water tank 12, close the cold water tank return control valve 27 and open the hot water tank return control valve 25. The defrosted antifreeze flows back to the hot water tank 11. After the frost layer on the surface of the defrost surface cooler 1 has completely melted, open the cold water tank supply control valve 26 and close the hot water tank supply control valve 24. The low-temperature antifreeze in the cold water tank 12 enters the defrost surface cooler 1. The antifreeze, which still has a relatively high temperature after defrosting, continues to flow back to the hot water tank 11. When all the high-temperature antifreeze has flowed back, all control valves are reset, completing the defrosting process of the surface cooler 1.

[0056] The present invention does not impose any restrictions on the specific structure and model of the hot water tank 11 and the cold water tank 12. Preferably, the hot water tank 11 and the cold water tank 12 can be cylindrical or cuboid in shape.

[0057] The heat exchanger in this invention is a dry-cooled heat exchanger, which refers to the outdoor fan coil heat exchanger used for heat dissipation in cold storage. "Dry" means that heat is dissipated through air rather than cooling water. This type of heat exchanger is used for heating in winter, and its function has changed from "heat dissipation" to "heat absorption".

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A desiccant air source heat pump system, characterized by: The heat pump unit (2), the heat supply circulating pump (3), the intermediate circulating pump (4), the heat supply water supply pipeline (5), the heat supply return water pipeline (6), the intermediate water supply pipeline (7), the intermediate return water pipeline (8), the heat storage heat exchanger (9), the first heat storage circulating pump (10), the hot water tank (11), the cold water tank (12), the defrosting pump (13), the heat storage primary water supply pipeline (14), the heat storage primary return water pipeline (15), the heat storage secondary water supply pipeline (16), the heat storage secondary return water pipeline (17), the defrosting return water pipeline (18), the defrosting return water hot water tank branch line (18-1), the defrosting return water cold water tank branch line (18-2), the defrosting water supply pipeline (19), the defrosting water supply hot water tank branch line (19-1), the defrosting water supply cold water tank branch line (19-2), the heat storage pipeline control valve (28), a plurality of defrosting return water branch lines (18-3), a plurality of cooling coils (1), a plurality of intermediate water supply branch lines (7-1), a plurality of intermediate return water branch lines (8-1), a plurality of defrosting water supply branch lines (19-3); The condenser (2-1) outlet of the heat pump unit (2) is communicated with the heat supply water supply pipeline (5), the condenser (2-1) inlet is communicated with the heat supply return water pipeline (6), and the heat supply circulating pump (3) is installed on the heat supply return water pipeline (6); the evaporator (2-2) outlet of the heat pump unit (2) is communicated with the intermediate water supply pipeline (7), the evaporator (2-2) inlet is communicated with the intermediate return water pipeline (8), and the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8); each table cooler (1) inlet is communicated with the intermediate water supply pipeline (7) through a corresponding intermediate water supply branch line (7-1), each table cooler (1) outlet is communicated with the intermediate return water pipeline (8) through a corresponding intermediate return water branch line (8-1), one end of the heat storage heat exchanger (9) is communicated with the heat supply return water pipeline (6) through a heat storage primary water supply pipeline (14) and a heat storage primary return water pipeline (15), and two communication points are located between the heat pump unit (2) and the heat supply circulating pump (3) or before the heat supply circulating pump (3); the heat storage pipeline control valve (28) is installed on the heat supply return water pipeline (6) between the two communication points; the other end of the heat storage heat exchanger (9) is communicated with the hot water tank (11) through a heat storage secondary water supply pipeline (16) and a heat storage secondary return water pipeline (17), and the first heat storage circulating pump (10) is installed on the heat storage secondary water supply pipeline (16); the defrost water supply pipeline (19) is communicated with the hot water tank (11) outlet through a defrost water supply hot water tank branch line (19-1), the defrost water supply pipeline (19) is communicated with the cold water tank (12) outlet through a defrost water supply cold water tank branch line (19-2), and each intermediate water supply branch line (7-1) is communicated with the defrost water supply pipeline (19) through a defrost water supply branch line (19-3); the defrost return water pipeline (18) is communicated with the hot water tank (11) inlet through a defrost return water hot water tank branch line (18-1), the defrost return water pipeline (18) is communicated with the cold water tank (12) inlet through a defrost return water cold water tank branch line (18-2), and each intermediate return water branch line (8-1) is communicated with the defrost return water pipeline (18) through a defrost return water branch line (18-3); the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8); The heat pump system further comprises a water replenishment pressure stabilizing system; the water replenishment pressure stabilizing system is composed of a water replenishment pipeline (30), a water replenishment pump (31), a water discharge pipeline (32) and a pressure relief valve (33); one end of the water discharge pipeline (32) is communicated with the water replenishment pipeline (30), the other end of the water discharge pipeline (32) is communicated with the intermediate return water pipeline (8), and the communication point of the water discharge pipeline (32) and the water replenishment pipeline (30) is between the cold water tank (12) and the water replenishment pump (31).

2. A desiccant air source heat pump system as set forth in claim 1 wherein: One end of the water replenishment pipeline (30) is communicated with the cold water tank (12), the other end of the water replenishment pipeline (30) is communicated with the intermediate return water pipeline (8), and the water replenishment pump (31) is installed on the water replenishment pipeline (30); the pressure relief valve (33) is installed on the water discharge pipeline (32). One end of the water replenishment pipeline (30) is communicated with the cold water tank (12), the other end of the water replenishment pipeline (30) is communicated with the intermediate return water pipeline (8), and the water replenishment pump (31) is installed on the water replenishment pipeline (30); the pressure relief valve (33) is installed on the water discharge pipeline (32).

3. A desiccant air source heat pump system characterized by: The heat pump unit (2), the heat supply circulating pump (3), the intermediate circulating pump (4), the heat supply water supply pipeline (5), the heat supply return water pipeline (6), the intermediate water supply pipeline (7), the intermediate return water pipeline (8), the heat storage heat exchanger (9), the first heat storage circulating pump (10), the hot water tank (11), the cold water tank (12), the defrosting pump (13), the heat storage primary water supply pipeline (14), the heat storage primary return water pipeline (15), the heat storage secondary water supply pipeline (16), the heat storage secondary return water pipeline (17), the defrosting return water pipeline (18), the defrosting return water hot water tank branch line (18-1), the defrosting return water cold water tank branch line (18-2), the defrosting water supply pipeline (19), the defrosting water supply hot water tank branch line (19-1), the defrosting water supply cold water tank branch line (19-2), the heat storage pipeline control valve (28), a plurality of defrosting return water branch lines (18-3), a plurality of surface coolers (1), a plurality of intermediate water supply branch lines (7-1), a plurality of intermediate return water branch lines (8-1), a plurality of defrosting water supply branch lines (19-3); The condenser (2-1) outlet of the heat pump unit (2) is communicated with the heat supply water supply pipeline (5), the condenser (2-1) inlet is communicated with the heat supply return water pipeline (6), and the heat supply circulating pump (3) is installed on the heat supply return water pipeline (6); the evaporator (2-2) outlet of the heat pump unit (2) is communicated with the intermediate water supply pipeline (7), the evaporator (2-2) inlet is communicated with the intermediate return water pipeline (8), and the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8); each surface cooler (1) inlet is communicated with the intermediate water supply pipeline (7) through the corresponding intermediate water supply branch line (7-1), each surface cooler (1) outlet is communicated with the intermediate return water pipeline (8) through the corresponding intermediate return water branch line (8-1), one end of the heat storage heat exchanger (9) is communicated with the heat supply water supply pipeline (5) through the heat storage primary water supply pipeline (14) and the heat storage primary return water pipeline (15), and the heat storage pipeline control valve (28) is installed on the heat supply water supply pipeline (5) between the two communication points; the other end of the heat storage heat exchanger (9) is communicated with the hot water tank (11) through the heat storage secondary water supply pipeline (16) and the heat storage secondary return water pipeline (17), and the first heat storage circulating pump (10) is installed on the heat storage secondary water supply pipeline (16); the defrosting water supply pipeline (19) is communicated with the hot water tank (11) outlet through the defrosting water supply hot water tank branch line (19-1), the defrosting water supply pipeline (19) is communicated with the cold water tank (12) outlet through the defrosting water supply cold water tank branch line (19-2), and each intermediate water supply branch line (7-1) is communicated with the defrosting water supply pipeline (19) through the defrosting water supply branch line (19-3); the defrosting return water pipeline (18) is communicated with the hot water tank (11) inlet through the defrosting return water hot water tank branch line (18-1), the defrosting return water pipeline (18) is communicated with the cold water tank (12) inlet through the defrosting return water cold water tank branch line (18-2), and each intermediate return water branch line (8-1) is communicated with the defrosting return water pipeline (18) through the defrosting return water branch line (18-3); the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8).

4. A desiccant air source heat pump system as claimed in claim 3, wherein: The heat pump system further comprises a water supplement and pressure stabilizing system; the water supplement and pressure stabilizing system is composed of a water supplement pipeline (30), a water supplement pump (31), a water discharge pipeline (32) and a pressure relief valve (33); one end of the water supplement pipeline (30) is communicated with the cold water tank (12), the other end of the water supplement pipeline (30) is communicated with the intermediate water return pipeline (8), and the water supplement pump (31) is installed on the water supplement pipeline (30); one end of the water discharge pipeline (32) is communicated with the water supplement pipeline (30), the other end of the water discharge pipeline (32) is communicated with the intermediate water return pipeline (8), the communication point of the water discharge pipeline (32) and the water supplement pipeline (30) is between the cold water tank (12) and the water supplement pump (31), and the pressure relief valve (33) is installed on the water discharge pipeline (32).

5. A desiccant air source heat pump system characterized by: The heat pump system further comprises a water supplement and pressure stabilizing system; the water supplement and pressure stabilizing system is composed of a water supplement pipeline (30), a water supplement pump (31), a water discharge pipeline (32) and a pressure relief valve (33); one end of the water supplement pipeline (30) is communicated with the cold water tank (12), the other end of the water supplement pipeline (30) is communicated with the intermediate water return pipeline (8), and the water supplement pump (31) is installed on the water supplement pipeline (30); one end of the water discharge pipeline (32) is communicated with the water supplement pipeline (30), the other end of the water discharge pipeline (32) is communicated with the intermediate water return pipeline (8), the communication point of the water discharge pipeline (32) and the water supplement pipeline (30) is between the cold water tank (12) and the water supplement pump (31), and the pressure relief valve (33) is installed on the water discharge pipeline (32). The condenser (2-1) of the heat pump unit (2) is communicated with the heat supply water supply pipeline (5), the inlet of the condenser (2-1) is communicated with the heat supply return water pipeline (6), and the heat supply circulating pump (3) is installed on the heat supply return water pipeline (6); the outlet of the evaporator (2-2) of the heat pump unit (2) is communicated with the intermediate water supply pipeline (7), the inlet of the evaporator (2-2) is communicated with the intermediate return water pipeline (8), and the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8); the inlet of each table cooler (1) is communicated with the intermediate water supply pipeline (7) through a corresponding intermediate water supply branch line (7-1), the outlet of each table cooler (1) is communicated with the intermediate return water pipeline (8) through a corresponding intermediate return water branch line (8-1), one end of the heat storage heat exchanger (9) is communicated with the heat supply return water pipeline (6) through a heat storage primary water supply pipeline (14), and the other end of the heat storage heat exchanger (9) is communicated with the heat supply water supply pipeline (5) through a heat storage primary return water pipeline (15); the communication point of the heat storage primary water supply pipeline (14) and the heat supply return water pipeline (6) is located between the heat supply circulating pump (3) and the heat pump unit (2), and the heat storage pipeline control valve (28) is installed on the heat storage primary return water pipeline (15); the other end of the heat storage heat exchanger (9) is communicated with the hot water tank (11) through a heat storage secondary water supply pipeline (16) and a heat storage secondary return water pipeline (17), and the first heat storage circulating pump (10) is installed on the heat storage secondary water supply pipeline (16); the defrost water supply pipeline (19) is communicated with the outlet of the hot water tank (11) through a defrost water supply hot water tank branch line (19-1), the defrost water supply pipeline (19) is communicated with the outlet of the cold water tank (12) through a defrost water supply cold water tank branch line (19-2), and each intermediate water supply branch line (7-1) is communicated with the defrost water supply pipeline (19) through a defrost water supply branch line (19-3); the defrost return water pipeline (18) is communicated with the inlet of the hot water tank (11) through a defrost return water hot water tank branch line (18-1), the defrost return water pipeline (18) is communicated with the inlet of the cold water tank (12) through a defrost return water cold water tank branch line (18-2), and each intermediate return water branch line (8-1) is communicated with the defrost return water pipeline (18) through a defrost return water branch line (18-3); the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8).

6. A desiccant air source heat pump system as claimed in claim 5, wherein: The heat pump system further comprises a water replenishment pressure stabilizing system; the water replenishment pressure stabilizing system is composed of a water replenishment pipeline (30), a water replenishment pump (31), a water discharge pipeline (32) and a pressure relief valve (33); one end of the water replenishment pipeline (30) is communicated with the cold water tank (12), the other end of the water replenishment pipeline (30) is communicated with the intermediate return water pipeline (8), and the water replenishment pump (31) is installed on the water replenishment pipeline (30); one end of the water discharge pipeline (32) is communicated with the water replenishment pipeline (30), the other end of the water discharge pipeline (32) is communicated with the intermediate return water pipeline (8), the communication point of the water discharge pipeline (32) and the water replenishment pipeline (30) is between the cold water tank (12) and the water replenishment pump (31), and the pressure relief valve (33) is installed on the water discharge pipeline (32).

7. A desiccant air source heat pump system characterized by: The heat pump unit (2), the heat supply circulating pump (3), the intermediate circulating pump (4), the heat supply water supply pipeline (5), the heat supply return water pipeline (6), the intermediate water supply pipeline (7), the intermediate return water pipeline (8), the heat storage heat exchanger (9), the first heat storage circulating pump (10), the hot water tank (11), the cold water tank (12), the defrosting pump (13), the heat storage primary water supply pipeline (14), the heat storage primary return water pipeline (15), the heat storage secondary water supply pipeline (16), the heat storage secondary return water pipeline (17), the defrosting return water pipeline (18), the defrosting return water hot water tank branch line (18-1), the defrosting return water cold water tank branch line (18-2), the defrosting water supply pipeline (19), the defrosting water supply hot water tank branch line (19-1), the defrosting water supply cold water tank branch line (19-2), a plurality of defrosting return water branch lines (18-3), a plurality of intermediate water supply branch lines (7-1), a plurality of intermediate return water branch lines (8-1) and a plurality of defrosting water supply branch lines (19-3), and the heat storage pipeline control valve (28) or the second heat storage circulating pump (29); The condenser (2-1) of the heat pump unit (2) is communicated with the heat supply water supply pipeline (5), the inlet of the condenser (2-1) is communicated with the heat supply return water pipeline (6), and the heat supply circulating pump (3) is installed on the heat supply return water pipeline (6); the outlet of the evaporator (2-2) of the heat pump unit (2) is communicated with the intermediate water supply pipeline (7), the inlet of the evaporator (2-2) is communicated with the intermediate return water pipeline (8), and the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8); the inlet of each table cooler (1) is communicated with the intermediate water supply pipeline (7) through a corresponding intermediate water supply branch line (7-1), the outlet of each table cooler (1) is communicated with the intermediate return water pipeline (8) through a corresponding intermediate return water branch line (8-1), one end of the heat storage heat exchanger (9) is communicated with the heat supply return water pipeline (6) through a heat storage primary water supply pipeline (14) and a heat storage primary return water pipeline (15), the heat supply circulating pump (3) is arranged between the two communication points, and the heat storage primary water supply pipeline (14) is provided with a heat storage pipeline control valve (28) or a second heat storage circulating pump (29); the other end of the heat storage heat exchanger (9) is communicated with the hot water tank (11) through a heat storage secondary water supply pipeline (16) and a heat storage secondary return water pipeline (17), and the first heat storage circulating pump (10) is installed on the heat storage secondary water supply pipeline (16); the defrosting water supply pipeline (19) is communicated with the outlet of the hot water tank (11) through a defrosting water supply hot water tank branch line (19-1), the defrosting water supply pipeline (19) is communicated with the outlet of the cold water tank (12) through a defrosting water supply cold water tank branch line (19-2), and each intermediate water supply branch line (7-1) is communicated with the defrosting water supply pipeline (19) through a defrosting water supply branch line (19-3); the defrosting return water pipeline (18) is communicated with the inlet of the hot water tank (11) through a defrosting return water hot water tank branch line (18-1), the defrosting return water pipeline (18) is communicated with the inlet of the cold water tank (12) through a defrosting return water cold water tank branch line (18-2), and each intermediate return water branch line (8-1) is communicated with the defrosting return water pipeline (18) through a defrosting return water branch line (18-3); the intermediate circulating pump (4) is installed on the intermediate return water pipeline (8).

8. A desiccant air source heat pump system as claimed in claim 7, wherein: The heat pump system further comprises a water replenishment pressure stabilizing system; the water replenishment pressure stabilizing system comprises a water replenishment pipeline (30), a water replenishment pump (31), a water discharge pipeline (32) and a pressure relief valve (33); one end of the water replenishment pipeline (30) is communicated with the cold water tank (12), the other end of the water replenishment pipeline (30) is communicated with the intermediate return water pipeline (8), and the water replenishment pump (31) is installed on the water replenishment pipeline (30); one end of the water discharge pipeline (32) is communicated with the water replenishment pipeline (30), the other end of the water discharge pipeline (32) is communicated with the intermediate return water pipeline (8), the communication point of the water discharge pipeline (32) and the water replenishment pipeline (30) is between the cold water tank (12) and the water replenishment pump (31), and the pressure relief valve (33) is installed on the water discharge pipeline (32).

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