CN209623149U - Use ground source heat pump system of holding energy suitable for south based on cold and hot balance - Google Patents

Abstract

The utility model relates to a ground source heat pump system which is suitable for the south based on the balance of cold and heat and uses energy storage, belonging to the field of building air conditioning. The utility model solves the problem of soil heat accumulation caused by the application of ground source heat pumps because the cooling load of buildings in southern China in summer is greater than the heating load in winter. The main components include buried pipes, heat exchangers, ground source heat pump units, water pumps, phase change heat accumulators, hot water heat pumps, regulating valves and water terminals. The utility model uses the soil as a cold and heat source to adjust the indoor environment, balances the heat released to the ground in summer and the heat absorbed from the ground in winter, and avoids the heat accumulation problem caused by the long-term operation of the ground source heat pump. In summer conditions, part of the heat is discharged into the ground through the buried pipe, and part of the heat is stored through the phase change heat storage system. In the transition season and winter, the cold fluid exchanges heat with the phase change regenerator, which is used as the heat source of the hot water heat pump or directly used as domestic water. The system can operate efficiently for a long time without destroying the soil heat balance.

Description

A ground source heat pump system using energy storage based on cold and heat balance in the south

technical field

The invention relates to a ground source heat pump system that is suitable for the south based on cold and heat balance and uses energy storage, and belongs to the field of building air conditioners.

Background technique

With the development of social productivity, people's living standards have gradually improved, and the requirements for air-conditioning technology in the living environment have also increased. While air-conditioning devices meet the design requirements and indoor comfort, they have higher requirements for energy saving and environmental protection.

Ground source heat pump is a technology that uses clean and renewable energy using soil as a source of cooling and heat. The ground source heat pump system continuously absorbs heat from indoors and discharges it underground in summer; in winter, it continuously extracts heat from the soil to achieve indoor heating. In southern China, when the cooling load is greater than the heating load, the heat discharged into the ground in summer is greater than the heat absorbed in winter, and the long-term operation of the unit will form "heat accumulation" underground, which will gradually increase the temperature of the underground constant temperature zone. The cooling efficiency of the unit deteriorates year by year, affecting the normal use of the unit. Therefore, in the design process of the ground source heat pump, it is necessary to ensure the balance between the heat dissipation of the system to the ground in summer and the heat extracted from the soil in winter.

In order to alleviate the heat accumulation phenomenon, there are generally three ways: one is to use cooling towers to assist heat dissipation, and the excess heat in summer is released through the cooling tower to ensure the balance of heat in winter and summer; the other is to use heat recovery technology to convert excess heat into production of life Water; thirdly, in the design, the buried pipe system is designed according to the heat absorption load in winter, and the cooling part adopts a small chiller for auxiliary cooling. For example, in the patent 201210103729.2, the excess heat in summer is discharged to the atmospheric environment through the cooling tower, and then supplementary cooling equipment is used to achieve the purpose of balancing the cooling and heating load of the soil throughout the year. The defect of this patent lies in the addition of cooling towers and refrigeration units, which complicates the system, reduces reliability, and results in high operating energy consumption. The patent 201510755458.2 divides the buried pipe into A and B, which are used alternately. When the system is under partial load condition, only A is used as the system's cold and heat source, and B is connected to the natural heat exchange cycle to absorb heat/cold Stored in buried pipes for use in the next heating/cooling season. The defect of this patent is that if the buried pipes are divided into zones, it is necessary to ensure that the buried pipes of a single area can meet the cold/heat required in summer and winter. The number of buried pipes is twice that of the normal single-area buried pipes. complex.

The invention uses the ground source heat pump as the cold and heat source of the air conditioning system and is applied to the air conditioning system. The phase change heat exchanger stores the heat that cannot be balanced by the soil in summer, and produces domestic water and heating water in transitional seasons and winters. It not only alleviates the "heat accumulation" problem of the ground source heat pump, but also utilizes the original excess heat to achieve efficient use of energy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a ground source heat pump system that is suitable for the south based on the balance of cold and heat and uses energy storage.

It consists of a buried pipe (1), an outlet water regulating valve (2) of the buried pipe, an inlet pump (3) of the first heat exchanger, a fluid channel (4) on the side of the buried pipe of the first heat exchanger, and a heat pump of the first heat exchanger. Side fluid channel (5), ground source heat pump unit (6), solution pump (7), refrigerant regulating valve (8), second heat exchanger heat pump side fluid channel (9), second heat exchanger (10) , air conditioner terminal heat exchange channel (11), air conditioner terminal inlet pump (12), air conditioner terminal water inlet control valve (13), air conditioner terminal (14), first heat exchanger (15), phase change heat accumulator water inlet A regulating valve (16), a phase change heat accumulator inlet pump (17), a phase change heat accumulator heat taking fluid passage (18), a phase change heat accumulator (19), a phase change heat accumulator heating fluid passage (20) ), hot water heat pump water inlet regulating valve (21), hot water heat pump inlet water pump (22), evaporator phase change heat accumulator side fluid channel (23), hot water heat pump unit (24), condenser water terminal side fluid Channel (25), high temperature water inlet pump (26), high temperature water terminal regulating valve (27), high temperature water terminal (28), low temperature water inlet regulating valve (29), low temperature water inlet pump (30), low temperature water terminal (31), phase change heat accumulator outlet water regulating valve (32), tap water inlet (33), evaporator refrigerant passage (34), condenser refrigerant passage (35), evaporator (36), condenser ( 37) Composition.

The outlet of the buried pipe (1) is connected to the inlet of the water outlet regulating valve (2) of the buried pipe, and the inlet of the inlet water pump (3) of the first heat exchanger is connected to the outlet of the outlet water regulating valve (2) of the buried pipe. The outlet of the heat exchanger inlet water pump (3) is connected to the inlet of the fluid channel (4) on the buried pipe side of the first heat exchanger, and the outlet of the fluid channel (4) on the buried pipe side of the first heat exchanger is connected to the buried pipe (4). 1) The inlets are connected to form a complete loop I;

The outlet of the buried pipe (1) is connected to the inlet of the water outlet regulating valve (2) of the buried pipe, and the inlet of the inlet water pump (3) of the first heat exchanger is connected to the outlet of the outlet water regulating valve (2) of the buried pipe. The outlet of the heat exchanger inlet water pump (3) is connected to the inlet of the fluid channel (4) on the side of the buried pipe of the first heat exchanger, and the outlet of the fluid channel (4) on the side of the buried pipe of the first heat exchanger is connected with the phase change heat storage The inlet of the inlet water regulating valve (16) of the phase change regenerator is connected to the inlet of the inlet water regulating valve (16) of the phase change regenerator, and the outlet of the inlet water regulating valve (16) of the phase change regenerator is connected to the inlet of the inlet water pump (17) of the phase change regenerator, and the inlet water pump (17) of the phase change regenerator is connected. ) outlet is connected with the inlet of the phase change heat accumulator taking heat fluid channel (18), the outlet of the phase change heat accumulator taking heat fluid channel (18) is connected with the inlet of the phase change heat accumulator water outlet regulating valve (32), The outlet of the variable heat accumulator outlet water regulating valve (32) is connected to the inlet of the buried pipe (1) to form a complete circuit II;

The outlet of the fluid channel (5) on the heat pump side of the first heat exchanger is connected to the inlet on the first heat exchanger side of the ground source heat pump unit (6), and the outlet on the first heat exchanger side of the ground source heat pump unit (6) is connected to the solution pump The inlet of (7) is connected, the outlet of the solution pump (7) is connected with the inlet of the refrigerant regulating valve (8), and the outlet of the refrigerant regulating valve (8) is connected with the inlet of the fluid channel (9) on the heat pump side of the second heat exchanger The outlet of the fluid channel (9) on the heat pump side of the second heat exchanger is connected with the inlet on the fan coil side of the ground source heat pump unit (6), and the outlet on the plate heat exchanger side of the ground source heat pump unit (6) is connected with the first heat exchange unit. The inlets of the fluid passages (5) on the heat pump side of the heater are connected to form a complete circuit III;

The outlet of the air-conditioning terminal heat exchange channel (11) is connected to the inlet of the air-conditioning terminal inlet water pump (12), the outlet of the air-conditioning terminal inlet pump (12) is connected to the inlet of the air-conditioning terminal water inlet regulating valve (13), and the air-conditioning terminal water inlet is adjusted. The outlet of the valve (13) is connected with the inlet of the air-conditioning terminal (14), and the outlet of the air-conditioning terminal (14) is connected with the inlet of the heat exchange channel (11) at the air-conditioning terminal, forming a complete circuit IV;

The outlet of the heating fluid channel (20) of the phase change regenerator is connected with the inlet of the low-temperature water inlet regulating valve (29), and the outlet of the low-temperature water inlet regulating valve (29) is connected with the inlet of the low-temperature water inlet pump (30). The outlet of the water inlet pump (30) is connected with the inlet of the low-temperature water terminal (31), and the outlet of the low-temperature water terminal (31) is connected to the heating fluid channel VIII loop V of the phase change regenerator;

The outlet of the heating fluid channel (20) of the phase change heat pump is connected to the inlet of the hot water heat pump water inlet regulating valve (21), and the outlet of the hot water heat pump water inlet regulating valve (21) is connected to the hot water heat pump inlet water pump (22) The outlet of the hot water heat pump inlet water pump (22) is connected to the inlet of the fluid channel (23) on the side of the phase-change regenerator of the evaporator, and the outlet of the fluid channel (23) on the side of the phase-change regenerator of the evaporator is connected with the inlet of the phase-change regenerator. The inlets of the heater heating fluid channels (20) are connected to form a complete loop VI;

The outlet of the refrigerant passage (34) of the evaporator is connected to the compressor in the unit, the outlet of the compressor of the unit is connected to the inlet of the refrigerant passage (35) of the condenser, and the outlet of the refrigerant passage (35) of the condenser is connected to the throttling device in the unit. The outlet of the flow device is connected to the inlet of the condenser refrigerant passage (35) to form a complete circuit VII;

The outlet of the condenser water terminal side fluid channel (25) is connected to the inlet of the high temperature water inlet pump (26), the outlet of the high temperature water inlet pump (26) is connected to the inlet of the high temperature water terminal regulating valve (27), and the high temperature water terminal is adjusted The outlet of the valve (27) is connected to the inlet of the high-temperature water terminal (28), and the outlet of the high-temperature water terminal (28) is connected to the inlet of the condenser water terminal side fluid channel (25) to form a complete circuit VIII;

The tap water inlet (33) is connected to the water terminal side fluid channel (25) of the condenser.

Under summer working conditions, the buried pipe outlet water regulating valve (2), the refrigerant regulating valve (8), the air-conditioning terminal water inlet regulating valve (13), the phase change heat accumulator water inlet regulating valve (16), the phase change storage The heater outlet water regulating valve (32) is opened, and the tap water inlet valve (33) is opened; the hot water heat pump water inlet regulating valve (21), the high temperature water terminal regulating valve (27), and the low temperature water inlet regulating valve (29) are closed; The first heat exchanger inlet water pump (3), the solution pump (7), the air-conditioning terminal inlet water pump (12), the phase change heat accumulator inlet water pump (17), and the high temperature water inlet water pump (26) are turned on; the hot water heat pump inlet water pump (22), the low temperature water inlet pump (30) is closed;

Under summer conditions, when the system starts to run, the buried pipe (1) sends out the water after heat exchange with the soil, flows through the buried pipe outlet water regulating valve (2), and passes through the first heat exchanger into the water pump (3) The pump is pumped to the fluid channel (4) on the buried pipe side of the first heat exchanger, and the water is refrigerant in the fluid channel (4) on the buried pipe side of the first heat exchanger and the fluid channel (5) on the heat pump side of the first heat exchanger Heat exchange is performed, and part of the water after heat exchange flows into the buried pipe (1) for the next cycle; part of the water flows through the phase change heat accumulator water inlet regulating valve (16) and then passes through the phase change heat accumulator water inlet pump (17) The heat-receiving fluid channel (18) sent to the phase-change regenerator exchanges heat with the phase-change heat-storage material in the phase-change regenerator, and the heat-exchanged water flows through the phase-change regenerator outlet regulating valve (32) and then flows into the ground. pipe (1) for the next cycle; the refrigerant in the heat pump side fluid channel (5) of the first heat exchanger after heat exchange is used as the cold source of the ground source heat pump unit (6), and the ground source heat pump unit (6) produces After the cold fluid is pumped by the solution pump (7) and adjusted by the refrigerant regulating valve (8), it is sent to the fluid channel (9) on the heat pump side of the second heat exchanger to exchange with the fluid in the heat exchange channel (11) at the end of the air conditioner. Heat, the heat exchanged fluid in the heat exchange channel (11) at the end of the air conditioner is pumped by the air inlet pump (12) at the end of the air conditioner, and then regulated by the water inlet regulating valve (13) at the end of the air conditioner, and then sent to the inner coil of the end of the air conditioner (14). The coil of the air conditioner end (14) exchanges heat with the indoor air to adjust the indoor ambient temperature; the phase change heat storage material in the phase change heat accumulator (19) is sent out from the fluid channel (4) on the buried pipe side of the first heat exchanger. Part of the water heat exchange absorbs a large amount of latent heat of phase change and stores a large amount of heat;

Under winter working conditions, the buried pipe outlet water regulating valve (2), the refrigerant regulating valve (8), the air-conditioning terminal water inlet regulating valve (13), the phase change heat accumulator water inlet regulating valve (16), the hot water heat pump The water inlet regulating valve (21), the high temperature water terminal regulating valve (27), the low temperature water inlet regulating valve (29), the phase change heat accumulator outlet regulating valve (32), and the tap water inlet valve (33) are opened; Heat exchanger inlet water pump (3), solution pump (7), air conditioner terminal inlet water pump (12), phase change heat accumulator inlet water pump (17), high temperature water inlet water pump (26), water heat pump inlet water pump (22), The low temperature water inlet pump (30) is turned on;

In winter conditions, when the system starts to operate, the water after heat exchange with the soil is sent out from the buried pipe (1), flows through the outlet water regulating valve (2) of the buried pipe, and passes through the first heat exchanger into the water pump (3) The pump is pumped to the fluid channel (4) on the buried pipe side of the first heat exchanger, and the water is carried out in the medium in the fluid channel (4) on the buried pipe side of the first heat exchanger and the fluid channel (5) on the heat pump side of the first heat exchanger. For heat exchange, all the water after heat exchange flows into the buried pipe (1) for the next cycle; the medium in the fluid channel (5) on the heat pump side of the first heat exchanger after heat exchange is used as the source of the ground source heat pump unit (6). The heat source, the hot fluid produced by the ground source heat pump unit (6) is pumped by the solution pump (7) and adjusted by the refrigerant regulating valve (8), and then sent to the heat pump side fluid channel (9) of the second heat exchanger for exchange with the air conditioner terminal. The fluid in the hot channel (11) exchanges heat, and the heat-exchanged fluid in the heat exchange channel (11) at the end of the air conditioner is pumped by the air inlet pump (12) at the end of the air conditioner, adjusted by the water inlet regulating valve (13) at the end of the air conditioner, and then sent to the end of the air conditioner. The inner coil at the end (14) of the air conditioner exchanges heat with the indoor air in the coil at the end (14) of the air conditioner to adjust the indoor ambient temperature;

In winter conditions, the phase change material in the phase change heat accumulator (19) releases heat, and the heat supply fluid channel (20) of the phase change heat accumulator sends out part of the fluid that has absorbed the heat of the phase change material, and flows through the low-temperature water into the The water regulating valve (29) is pumped into the low temperature water terminal through the low temperature water inlet pump (30); a part of the fluid that has absorbed the heat of the phase change material flows through the hot water heat pump water inlet regulating valve (21), and passes through the hot water heat pump inlet pump (22) pumping into the evaporator phase change regenerator side fluid passage (23), and heat exchange with the refrigerant in the evaporator refrigerant passage (34) in the evaporator phase change regenerator side fluid passage (23), The heat-exchanged fluid flows out of the phase-change regenerator side fluid channel (23) of the evaporator, and flows into the phase-change regenerator heat supply fluid channel (20) to exchange heat with the phase-change material in the phase-change regenerator (19), and continue The next cycle; the refrigerant after heat exchange with the fluid in the evaporator refrigerant passage (34) is compressed into a high temperature and high pressure refrigerant vapor by the compressor in the heat pump, enters the condenser refrigerant passage (35) and is connected with the condenser water end The fluid in the side fluid channel (25) exchanges heat, condenses and releases latent heat, and then flows into the evaporator phase change heat accumulator side fluid channel (23) to absorb heat and continues the next cycle after being throttled and cooled by the throttling valve in the hot water heat pump; The water introduced by the tap water inlet valve (33) flows into the condenser water terminal side fluid channel (25), the heat exchanged water in the condenser water terminal side fluid channel (25) flows through the high temperature water inlet pump (26), and the high temperature water The inlet water pump (26) pumps and flows through the high temperature water terminal regulating valve (27), and flows into the high temperature water terminal for use by the user.

The first heat exchanger buried pipe side fluid channel (4) and the first heat exchanger heat pump side fluid channel (5) are located inside the first heat exchanger (15); the second heat exchanger heat pump side fluid channel (9) ), the heat exchange channel (11) at the end of the air conditioner is located inside the second heat exchanger (10); the solution pump (7), the refrigerant regulating valve (8), the first heat exchanger (15), the second heat exchanger ( 10) Located inside the ground source heat pump unit (6); the phase change heat accumulator heat taking fluid channel (18) and the phase change heat accumulator heat supply fluid channel (20) are located inside the phase change heat accumulator (19); the evaporator Phase change heat accumulator side fluid passage (23), condenser water end side fluid passage (25), evaporator refrigerant passage (34), condenser refrigerant passage (35), evaporator (36), condenser ( 37) is located inside the hot water heat pump unit (24).

The low-temperature water terminal (31) supplies the user with low-temperature hot water, which can be used for low-temperature hot water radiant floor heating, window defogging, etc.; the high-temperature water terminal (28) supplies the user with high-temperature hot water, which can be used in bathrooms, kitchens, and other places where high-temperature water is required.

The phase change material in the phase change regenerator (19) is calcium chloride hexahydrate, CaCl ₂ ·6H ₂ O.

The working process of the phase-change heat accumulator (19) is as follows: under summer working conditions, the fluid heat-exchanged through the fluid channel (4) on the side of the buried pipe of the first heat exchanger flows through the phase-change heat accumulator to take the heat. The hot fluid channel (18) exchanges heat with the phase-change material CaCl _{2 .6H 2 O in the phase-change regenerator (19), and the calcium chloride hexahydrate (CaCl 2 .6H 2 O )} absorbs heat and generates a phase change from solid to liquid and store it in the phase-change heat exchanger; in transitional seasons and winter conditions, calcium chloride hexahydrate, CaCl ₂ ·6H ₂ O, changes from liquid to solid, releases heat, and flows through the phase change The fluid in the heat-supplying fluid channel (20) of the heat accumulator absorbs heat, part of the fluid is supplied to the low-temperature water terminal, and part of the fluid is supplied to the fluid channel (23) on the side of the phase-change heat accumulator of the evaporator.

Description of drawings

Figure 1 is a schematic diagram of the present invention.

Names of symbols in Figure 1: 1. Buried pipe, 2. Buried pipe outlet water regulating valve, 3. First heat exchanger inlet pump, 4. First heat exchanger buried pipe side fluid channel, 5. No. 1. Heat pump side fluid channel of heat exchanger, 6. Ground source heat pump unit, 7. Solution pump, 8. Refrigerant regulating valve, 9. Second heat exchanger heat pump side fluid channel, 10. Second heat exchanger, 11. Air conditioner terminal heat exchange channel, 12. Air conditioner terminal inlet pump, 13. Air conditioner terminal water inlet control valve, 14. Air conditioner terminal, 15. First heat exchanger, 16. Phase change heat accumulator water inlet control valve, 17. Phase change Variable heat accumulator inlet pump, 18. Phase change heat accumulator heat taking fluid channel, 19. Phase change heat accumulator, 20. Phase change heat accumulator heating fluid channel, 21. Hot water heat pump water inlet regulating valve, 22 .Hot water heat pump inlet pump, 23. Evaporator phase change heat accumulator side fluid channel, 24. Hot water heat pump unit, 25. Condenser water terminal side fluid channel, 26. High temperature water inlet pump, 27. High temperature water terminal adjustment Valve, 28. High temperature water terminal, 29. Low temperature water inlet control valve, 30. Low temperature water inlet pump, 31. Low temperature water terminal, 32. Phase change heat accumulator outlet water regulating valve, 33. Tap water inlet valve, 34. Evaporator refrigerant passage, 35. Condenser refrigerant passage, 36. Evaporator, 37. Condenser.

Detailed ways

As shown in Figure 1, a ground source heat pump system suitable for the use of energy storage based on cold and heat balance in the south mainly includes a buried pipe 1, a buried pipe outlet water regulating valve 2, a first heat exchanger inlet pump 3, a first The fluid channel 4 on the buried pipe side of the heat exchanger, the fluid channel 5 on the heat pump side of the first heat exchanger, the ground source heat pump unit 6, the solution pump 7, the refrigerant regulating valve 8, the fluid channel 9 on the heat pump side of the second heat exchanger, the first The second heat exchanger 10, the air-conditioning terminal heat exchange channel 11, the air-conditioning terminal water inlet pump 12, the air-conditioning terminal water inlet regulating valve 13, the air-conditioning terminal 14, the first heat exchanger 15, the phase change heat accumulator water inlet regulating valve 16, The variable heat accumulator inlet pump 17, the phase change heat accumulator heat taking fluid channel 18, the phase change heat accumulator 19, the phase change heat accumulator heating fluid channel 20, the hot water heat pump water inlet regulating valve 21, the hot water heat pump inlet Water pump 22, evaporator phase change regenerator side fluid channel 23, hot water heat pump unit 24, condenser water terminal side fluid channel 25, high temperature water inlet pump 26, high temperature water terminal regulating valve 27, high temperature water terminal 28, low temperature water Water inlet regulating valve 29, low temperature water inlet pump 30, low temperature water water terminal 31, phase change heat accumulator outlet water regulating valve 32, tap water inlet 33, evaporator refrigerant passage 34, condenser refrigerant passage 35, evaporator 36, Condenser 37.

Under summer working conditions, the buried pipe outlet water regulating valve 2, the refrigerant regulating valve 8, the air-conditioning terminal water inlet regulating valve 13, the phase change heat accumulator water inlet regulating valve 16, and the phase change heat accumulator outlet water regulating valve 32 are opened, The tap water inlet valve 33 is opened; the hot water heat pump inlet regulating valve 21, the high temperature water terminal regulating valve 27, and the low temperature water inlet regulating valve 29 are closed; the first heat exchanger inlet pump 3, the solution pump 7, and the air conditioner terminal inlet pump 12 , the phase change regenerator inlet water pump 17 and the high temperature water inlet water pump 26 are turned on; the hot water heat pump inlet water pump 22 and the low temperature water inlet water pump 30 are turned off;

Under summer conditions, when the system starts to run, the water after heat exchange with the soil is sent out from the buried pipe 1, flows through the outlet water regulating valve 2 of the buried pipe, and is pumped to the first heat exchanger by the inlet pump 3 of the first heat exchanger. The fluid channel 4 on the buried pipe side of the heat exchanger, the water exchanges heat in the fluid channel 4 on the buried pipe side of the first heat exchanger and the refrigerant in the fluid channel 5 on the heat pump side of the first heat exchanger, and part of the water after heat exchange flows into the ground Bury pipe 1, and carry out the next cycle; part of the water flows through the phase change heat accumulator water inlet regulating valve 16 and then is sent to the phase change heat accumulator by the phase change heat accumulator water inlet pump 17 into the phase change heat accumulator to take the heat fluid channel 18 and the phase change heat accumulator The internal phase change heat storage material exchanges heat, and the water after heat exchange flows through the water outlet regulating valve 32 of the phase change heat accumulator and then flows into the buried pipe 1 for the next cycle; the fluid channel 5 on the heat pump side of the first heat exchanger after heat exchange The refrigerant inside is used as the cold source of the ground source heat pump unit 6, and the cold fluid produced by the ground source heat pump unit 6 is pumped by the solution pump 7 and adjusted by the refrigerant regulating valve 8, and then sent to the fluid channel 9 on the heat pump side of the second heat exchanger. It exchanges heat with the fluid in the heat exchange channel 11 at the end of the air conditioner, and the heat-exchanged fluid in the heat exchange channel 11 at the end of the air conditioner is pumped by the end inlet pump 12 of the air conditioner, adjusted by the water inlet regulating valve 13 at the end of the air conditioner, and then sent to the end of the air conditioner 14 The coil is used to exchange heat with the indoor air in the coil at the end of the air conditioner 14 to adjust the indoor ambient temperature; Water heat exchange absorbs a large amount of latent heat of phase change and stores a large amount of heat;

Under the winter operating conditions, the buried pipe outlet water regulating valve 2, the refrigerant regulating valve 8, the air-conditioning terminal water inlet regulating valve 13, the phase change heat accumulator water inlet regulating valve 16, the hot water heat pump water inlet regulating valve 21, and the high-temperature water The terminal regulating valve 27, the low temperature water inlet regulating valve 29, the phase change heat accumulator outlet regulating valve 32, and the tap water inlet valve 33 are opened; the first heat exchanger inlet pump 3, the solution pump 7, the air-conditioning terminal inlet pump 12, The variable heat accumulator inlet water pump 17, the high temperature water inlet water pump 26, the water heat pump inlet water pump 22, and the low temperature water inlet water pump 30 are turned on;

Under winter conditions, when the system starts to run, the water after heat exchange with the soil is sent out from the buried pipe 1, flows through the outlet water regulating valve 2 of the buried pipe, and is pumped to the first heat exchanger by the inlet pump 3 of the first heat exchanger. The fluid channel 4 on the buried pipe side of the heat exchanger, the water exchanges heat in the fluid channel 4 on the buried pipe side of the first heat exchanger and the medium in the fluid channel 5 on the heat pump side of the first heat exchanger, and all the water after heat exchange flows into the ground. Pipe 1, carry out the next cycle; the medium in the fluid channel 5 on the heat pump side of the first heat exchanger after heat exchange is used as the heat source of the ground source heat pump unit 6, and the hot fluid produced by the ground source heat pump unit 6 is pumped by the solution pump 7 through the After the refrigerant regulating valve 8 is adjusted, it is sent to the fluid channel 9 on the heat pump side of the second heat exchanger to exchange heat with the fluid in the heat exchange channel 11 at the end of the air conditioner. The water pump 12 is pumped by the air-conditioning terminal water inlet regulating valve 13 and then sent to the inner coil of the air-conditioning terminal 14, and exchanges heat with the indoor air in the air-conditioning terminal 14 coil to adjust the indoor ambient temperature;

In winter conditions, the phase change material in the phase change heat accumulator 19 releases heat, and the heat supply fluid channel 20 of the phase change heat accumulator sends out a part of the fluid that has absorbed the heat of the phase change material, and flows through the low-temperature water inlet regulating valve 29 , and is pumped into the low temperature water terminal by the low temperature water inlet pump 30, which can be used for window defogging, hot water floor, etc.; a part of the fluid that has absorbed the heat of the phase change material flows through the hot water heat pump water inlet regulating valve 21, and is fed through the hot water heat pump. The water pump 22 is pumped into the evaporator phase change regenerator side fluid channel 23, and heat is exchanged with the refrigerant in the evaporator refrigerant channel 34 in the evaporator phase change regenerator side fluid channel 23, and the fluid after heat exchange flows out and evaporates The fluid channel 23 on the side of the phase change heat accumulator flows into the heat supply fluid channel 20 of the phase change heat accumulator and exchanges heat with the phase change material in the phase change heat accumulator 19, and continues the next cycle; The refrigerant after fluid heat exchange is compressed into high temperature and high pressure refrigerant vapor by the compressor in the heat pump, enters the condenser refrigerant passage 35 and exchanges heat with the fluid in the fluid passage 25 on the water end side of the condenser, condenses and releases latent heat and passes through the hot water. After throttling and cooling by the throttle valve in the heat pump, it flows into the evaporator phase change regenerator side fluid channel 23 to absorb heat and continues the next cycle; the water introduced by the tap water inlet valve 33 flows into the condenser water end side fluid channel 25, and in the condenser The heat exchanged water in the water terminal side fluid channel 25 flows through the high temperature water inlet pump 26, and is pumped by the high temperature water inlet pump 26 to flow through the high temperature water terminal regulating valve 27, and flows into the high temperature water terminal to supply hot water for kitchen and bathroom.

The invention provides a ground source heat pump system that is suitable for the south based on the balance of cold and heat and uses energy storage. The ground source heat pump is used as the cold and heat source of the air conditioning system and is applied to the air conditioning system, and the phase change heat exchanger can not be balanced by the system in summer. The heat is accumulated, and domestic water and heating water are produced in the transition season and winter. It not only alleviates the "heat accumulation" problem of the ground source heat pump, protects the soil thermal environment, but also utilizes the original excess heat to achieve efficient use of energy.

Claims (4)

1. it is a kind of suitable for south based on the cold thermally equilibrated ground-source heat pump system using accumulation of energy, it is characterised in that:

Water regulating valve (2), First Heat Exchanger intake pump (3), First Heat Exchanger underground pipe effluent are gone out by underground pipe (1), underground pipe Body channel (4), First Heat Exchanger heat pump side liquid channel (5), earth source heat pump unit (6), solution pump (7), refrigerant regulating valve (8), the second exchanger heat pump side fluid channel (9), the second heat exchanger (10), air conditioning terminal heat exchanger channels (11), air conditioning terminal Intake pump (12), air conditioning terminal inlet regulating valve (13), air conditioning terminal (14), First Heat Exchanger (15), phase change heat accumulator water inlet Regulating valve (16), phase change heat accumulator intake pump (17), phase change heat accumulator take zone of heat liberation (18), phase change heat accumulator (19), phase Become storage heater heat donor fluid channel (20), hot water heat pump inlet regulating valve (21), hot water heat pump intake pump (22), evaporator phase transformation Storage heater side liquid channel (23), hot water heat pump unit (24), condenser water end side fluid channel (25), high temperature water into Water pump (26), high temperature water end regulating valve (27), high temperature water end (28), low temperature water inlet regulating valve (29), low temperature Go out water regulating valve (32) with water intake pump (30), low temperature water end (31), phase change heat accumulator, tap water inlet valve (33), steam Send out device coolant channel (34), condenser refrigerant channel (35), evaporator (36), condenser (37) composition；

The outlet of underground pipe (1) is connected with the entrance that underground pipe goes out water regulating valve (2), the entrance of First Heat Exchanger intake pump (3) The outlet for going out water regulating valve (2) with underground pipe is connected, the outlet and First Heat Exchanger underground pipe side of First Heat Exchanger intake pump (3) The entrance of fluid channel (4) is connected, and the outlet in First Heat Exchanger underground pipe side liquid channel (4) is connected with underground pipe (1) entrance, Form complete loops I；

The outlet of underground pipe (1) is connected with the entrance that underground pipe goes out water regulating valve (2), the entrance of First Heat Exchanger intake pump (3) The outlet for going out water regulating valve (2) with underground pipe is connected, the outlet and First Heat Exchanger underground pipe side of First Heat Exchanger intake pump (3) The entrance of fluid channel (4) is connected, and the outlet in First Heat Exchanger underground pipe side liquid channel (4) and phase change heat accumulator water inlet are adjusted The entrance of valve (16) is connected, the outlet and the entrance phase of phase change heat accumulator intake pump (17) of phase change heat accumulator inlet regulating valve (16) Even, phase change heat accumulator intake pump (17) outlet takes the entrance of zone of heat liberation (18) to be connected with phase change heat accumulator, phase change heat accumulator The entrance for taking the outlet of zone of heat liberation (18) to go out water regulating valve (32) with phase change heat accumulator is connected, and phase change heat accumulator water outlet is adjusted The outlet of valve (32) is connected with underground pipe (1) entrance, forms complete loops II；

The outlet in First Heat Exchanger heat pump side liquid channel (5) is connected with the entrance of earth source heat pump unit (6) First Heat Exchanger side, The outlet of earth source heat pump unit (6) First Heat Exchanger side is connected with the entrance of solution pump (7), the outlet and refrigeration of solution pump (7) The entrance of agent regulating valve (8) is connected, and the outlet of refrigerant regulating valve (8) enters with second exchanger heat pump side fluid channel (9) Mouth is connected, the entrance phase of the outlet and earth source heat pump unit (6) fan coil side of the second exchanger heat pump side fluid channel (9) Even, earth source heat pump unit (6) plate heat exchanger side outlet is connected with the entrance in First Heat Exchanger heat pump side liquid channel (5), shape At complete loops III；

The outlet of air conditioning terminal heat exchanger channels (11) is connected with the entrance of air conditioning terminal intake pump (12), air conditioning terminal intake pump (12) outlet is connected with the entrance of air conditioning terminal inlet regulating valve (13), the outlet of air conditioning terminal inlet regulating valve (13) and sky The entrance of end (14) is adjusted to be connected, the outlet of air conditioning terminal (14) is connected with the entrance of air conditioning terminal heat exchanger channels (11), is formed Complete loops IV；

The outlet in phase change heat accumulator heat donor fluid channel (20) is connected with low temperature with water inlet regulating valve (29) entrance, low temperature water The outlet of inlet regulating valve (29) is connected with low temperature with water intake pump (30) entrance, the outlet of low temperature water intake pump (30) with it is low Temperature is connected with the entrance of water end (31), and low temperature is returned with the outlet of water end (31) and phase change heat accumulator heat donor fluid channel VIII Road V；

The outlet in phase change heat accumulator heat donor fluid channel (20) is connected with the entrance of hot water heat pump inlet regulating valve (21), hot water thermal The outlet of pump water inlet regulating valve (21) is connected with the entrance of hot water heat pump intake pump (22), the outlet of hot water heat pump intake pump (22) It is connected with evaporator phase change heat accumulator side liquid channel (23) entrance, the outlet in evaporator phase change heat accumulator side liquid channel (23) It is connected with the entrance in phase change heat accumulator heat donor fluid channel (20), forms complete loops VI；

Evaporator refrigerant channel (34) outlet is connected with unit inner compressor, and machine set compressor outlet and condenser refrigerant are logical Road (35) entrance be connected, condenser refrigerant channel (35) outlet is connected with throttling set in unit, throttling set export with it is cold Condenser coolant channel (35) entrance is connected, and forms complete loops VII；

The outlet of condenser water end side fluid channel (25) is connected with high temperature with the entrance of water intake pump (26), high temperature water The outlet of intake pump (26) is connected with high temperature with the entrance of water end regulating valve (27), and high temperature water end regulating valve (27) goes out Mouth is connected with high temperature with the entrance of water end (28), and the high temperature outlet of water end (28) and condenser water end side liquid are logical The entrance in road (25) is connected, and forms complete loops VIII；

Tap water inlet valve (33) is connected with condenser with water end side fluid channel (25).

2. it is according to claim 1 it is a kind of suitable for south based on the cold thermally equilibrated ground-source heat pump system using accumulation of energy, It is characterized by: wherein First Heat Exchanger underground pipe side liquid channel (4), First Heat Exchanger heat pump side liquid channel (5) are located at First Heat Exchanger (15) is internal；Second exchanger heat pump side fluid channel (9), air conditioning terminal heat exchanger channels (11) are located at second and change Hot device (10) is internal；Solution pump (7), refrigerant regulating valve (8), First Heat Exchanger (15), the second heat exchanger (10) are located at ground source Heat pump unit (6) is internal；Phase change heat accumulator takes zone of heat liberation (18), phase change heat accumulator heat donor fluid channel (20) to be located at phase transformation Storage heater (19) is internal；Evaporator phase change heat accumulator side liquid channel (23), is steamed condenser water end side fluid channel (25) Hair device coolant channel (34), condenser refrigerant channel (35), evaporator (36), condenser (37) are located at hot water heat pump unit (24) internal.

3. it is according to claim 1 it is a kind of suitable for south based on the cold thermally equilibrated ground-source heat pump system using accumulation of energy, It is characterized by: low temperature supplies user's low-temperature water heating with water end (31), it can be used for low temperature hot water radiation floor heating, window demisting； High temperature supplies user's high-temperature-hot-water with water end (28), can be used for toilet, there is the place of high temperature water demand in kitchen.

4. it is according to claim 1 it is a kind of suitable for south based on the cold thermally equilibrated ground-source heat pump system using accumulation of energy, It is characterized by: phase change heat accumulator (19) the interior phase-change material is calcium chloride hexahydrate CaCl₂·6H₂O。