CN102679484A - Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source - Google Patents

Abstract

The invention discloses a water-ring heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source. The closed circulation water system of the end air-conditioning system exhausts and absorbs heat and the automatic control system used to control the air-conditioning system of the ground source end and the user end; the ground source end system includes a compressor (1), a four-way valve (2) , the gas-liquid separator (3), and the water-water heat exchanger (4), the evaporation heat exchanger (5), the condensation heat exchanger (6), the expansion valve (7), the first valve (8), A function switching area (12) composed of the second valve (9), the third valve (10) and the fourth valve (11). The user-side air-conditioning system includes a heating-side heat exchanger (13) and a cooling-side heat exchanger (14). The invention makes full use of the waste heat in the building, and at the same time efficiently utilizes the low-grade geothermal energy.

Description

Water loop heat pump air conditioning system using geothermal energy as a single auxiliary cold and heat source

technical field

The invention is an optimized water loop heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source, and is especially suitable for public buildings and civil buildings in which the annual cooling and heating load structure in the building changes greatly.

Background technique

The traditional water loop heat pump air conditioning system consists of three parts: indoor small water/air heat pump unit, water circulation loop, auxiliary equipment (such as cooling tower, heating equipment, heat storage device, etc.), which can effectively use the waste heat in the building and save conventional air conditioners. Advantages such as the required cold and heat source equipment and the space of the machine room. The water loop heat pump air conditioning system uses circulating water as the heating source during heating and uses it as the heat exhausting source during cooling. If the water temperature rises, it will decrease on the contrary. In order to maintain a certain performance coefficient of the system, it is necessary to add auxiliary heating and cooling devices.

Therefore, although the current water-loop heat pump air-conditioning system can meet the heating and cooling needs of some colleagues, there are still the following main problems: the system needs to be equipped with auxiliary heating and cooling devices such as cooling towers and boilers, which is contrary to the hierarchical utilization of energy. The high-level energy is seriously wasted and the equipment is complicated, which is not conducive to monitoring and control; the user end uses a unitary unit, and the compressor is indoors, causing the indoor noise to be even greater than the noise of the fan coil unit; the traditional water loop heat pump control method is to use The cooling tower, heating equipment, and heat storage device are coordinated, and the functional area is divided according to the temperature of the circulating water system for control. However, because the user end uses a decentralized unit unit, the air conditioner usage of different users varies greatly, which directly leads to Poor control, degrading system performance.

Therefore, how to improve the form of the auxiliary cold and heat source system and the user's air-conditioning system to improve system performance and user flexibility is of great significance.

Contents of the invention

Technical problem: In order to solve the problems of control, noise and performance caused by the current water-ring heat pump air-conditioning system that needs to be equipped with high-grade auxiliary cold and heat source devices, and the user end adopts decentralized unit units, the present invention provides a ground-based The water loop heat pump air conditioning system with heat energy as a single auxiliary cold and heat source can use low-grade geothermal energy as the auxiliary cold and heat source to optimize the water loop heat pump air conditioning system.

Technical solution: In order to solve the above technical problems, the present invention provides a water loop heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source. Air-conditioning system, closed circulation water system that receives the heat exhausted and absorbed by the air-conditioning system at the user end, and the automatic control system for controlling the air-conditioning system at the ground source end and the user end;

The ground source system includes a compressor, a four-way valve, a gas-liquid separator, and a water-water heat exchanger, an evaporation heat exchanger, a condensation heat exchanger, an expansion valve, a first valve, a second valve, and a third valve. The function switching area composed of the valve and the fourth valve;

The user-side air-conditioning system includes heat exchangers at the heating end and heat exchangers at the cooling end;

The closed circulating water system is a circulating water system that accepts water-water heat exchangers, evaporative heat exchangers, and end-user heat exchangers at the heating end and heat exchangers at the cooling end to discharge and absorb heat, and a temperature sensor is installed in it To control the temperature of circulating water;

The automatic control system includes a temperature sensor, a control panel and a control program circuit board; among them,

The outlet of the compressor is connected to the first port of the four-way valve, the second port of the four-way valve is connected to the inlet of the gas-liquid separator, and the outlet of the gas-liquid separator is connected to the inlet of the compressor;

The third port and the fourth port of the four-way valve are respectively connected to the evaporating heat exchanger and the condensing heat exchanger, and the evaporating heat exchanger is connected to the condensing heat exchanger through the expansion valve; the outlet end of the circulating water of the evaporating heat exchanger is connected to the heating The end heat exchanger is connected with the cooling end heat exchanger, and returns to the evaporating heat exchanger through the second valve;

The circulating water at the ground source is connected to the water-water heat exchanger through the third valve, and connected to the condensing heat exchanger through the fourth valve;

The user end of the water-water heat exchanger is respectively connected to the heat exchanger at the heating end and the heat exchanger at the cooling end through a first valve to receive the heat absorbed and released by the user end;

The temperature probe of the temperature sensor is connected to the closed circulating water system, and is arranged in the upstream dry pipe area of the heat exchanger at the heating end and the heat exchanger at the cooling end, so that the probe end of the temperature sensor monitors the water-water The water temperature after the heat exchange between the user end of the heat exchanger and the soil.

Preferably, the heat exchange working medium in the evaporating heat exchanger and the condensing heat exchanger are circulating water and refrigeration working medium respectively, and one end of the heat exchanging medium in the water-water heat exchanger is circulating water, and the other end is ground source end circulation water;

Preferably, the water-water heat exchanger adopts a plate heat exchanger, and the evaporating heat exchanger and the condensation heat exchanger adopt a plate and sleeve heat exchanger.

Preferably, the heat extraction method at the ground source end adopts vertical buried pipes or horizontal buried pipes.

Preferably, the air-conditioning system at the user end adopts any one of the user's individual refrigeration units in the traditional water-loop heat pump system, or a semi-centralized air-conditioning unit that separates cooling and heating and divides according to user needs.

Preferably, the semi-centralized air-conditioning unit adopts an air-cooled air conditioner or a multi-connected inverter air conditioner.

Beneficial effects: In the optimized water ring heat pump air conditioning system, centralized cooling and heating and semi-centralized air conditioning units can be used according to user needs and different cooling and heating load structures to meet different air conditioning terminal functions, use time and control requirements; and the air conditioning The unit can adopt an air-cooled air conditioner or a multi-connected inverter air conditioner, which has greater flexibility and can meet different terminal needs.

Description of drawings

Fig. 1 is a structural schematic diagram of an optimized water loop heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source of the present invention.

In the figure, compressor 1, four-way valve 2, gas-liquid separator 3, water-water heat exchanger 4, evaporation heat exchanger 5, condensation heat exchanger 6, expansion valve 7, first valve 8, second valve 9. The third valve 10, the fourth valve 11, the function switching area 12; the heat exchanger 13 at the heating end, the heat exchanger 14 at the cooling end; the temperature sensor 15, and the drive controller 16.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The optimized water loop heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source provided by the present invention includes a geothermal energy terminal system, a closed circulating water system, a semi-centralized/split-type heating and cooling air-conditioning system, and an automatic control system and so on. Among them, the geothermal energy terminal system mainly includes a compressor, a four-way valve, a water-water heat exchanger, two water-working medium heat exchangers, etc. In order to solve the above-mentioned technical problems, the present invention realizes technical updates through the following aspects.

Using geothermal energy as a single cold and heat source can effectively reduce the number of equipment control units. Through the valve control switch in the function switching area and the additional heating and cooling of the ground source unit, the temperature rise and cool down of the circulating water system can be completed, and the temperature of the perennial cooling area in the inner area can be stabilized at one time. The condensing temperature can effectively improve the cooling performance of the inner zone. Due to the stability of geothermal energy, the system can switch between heating and cooling of the geothermal unit, so that geothermal energy can be used as the single auxiliary low-grade cold and heat source without adding high-grade auxiliary cold and heat sources and heat storage devices.

The system determines the function switch by monitoring the temperature of the circulating water user’s inlet water. Specifically, the system operation mode includes four types: In the self-sufficiency mode (mode 1), the waste heat in the building can meet the demand by itself, and the ground source system is completely closed; the self-sufficiency mode cannot When the demand is met, start the ground-source circulating heat exchange mode (mode 2), that is, the closed circulating water system uses geothermal energy to directly exchange heat, the ground-source unit is turned off, and the water pump is running; when the closed circulating water in the circulating heat exchange mode When the temperature in the system exceeds the set upper limit, start the additional cooling mode (mode 3), that is, the ground source unit starts the cooling condition, and completes the temperature adjustment of the closed circulating water in the ground source evaporative heat exchanger until it meets the requirements; When the temperature in the closed circulating water system is lower than the set lower limit, the ground source unit starts the additional heating mode (mode 4), and the temperature adjustment of the closed circulating water is completed in the ground source condensing heat exchanger until it meets the requirements. The switching of the four operating modes realizes the full utilization of waste heat and low-grade geothermal energy in the building.

It can be seen from the above control method that only in modes 3 and 4 will the ground source unit be turned on for additional heating and cooling. For specific adjustment and control, the basic temperature (generally 13-35°C) that needs to be met in the closed circulating water system can be set according to the needs of users, and the soil temperature is within this range. Mode 2 is adopted for most buildings with cooling and heating load structures. Therefore, the additional heating and cooling capacity of the ground source end is very small, and the installed capacity of the corresponding ground source end unit is also greatly reduced.

Scattered unit units at the user end will cause excessive noise on the user side, and due to large differences in user use, it will increase the difficulty of control. In this optimized water loop heat pump air conditioning system, centralized cooling and heating and semi-centralized air conditioning units can be used according to user needs and different cooling and heating load structures to meet different air conditioning terminal functions, use time and control requirements; and the air conditioning unit can be Adopt air cooling.

The invention provides an optimized water ring heat pump air conditioning system using geothermal energy as a single auxiliary cold and heat source. The invention is mainly aimed at the problems of high-grade energy waste caused by adding cooling and heat source devices separately during the operation of the traditional water-ring heat pump air-conditioning system, and the fact that the temperature of the circulating water system in the traditional system cannot be stably controlled, which leads to the cooling coefficient of the inner zone of the perennial refrigeration. The disadvantage is relatively low. By adding geothermal devices and adopting intelligent control methods, the low-grade geothermal energy can be fully utilized according to the different composition of the building load, and the stability of the system's simultaneous heating and cooling performance can be enhanced. At the same time, due to the characteristics of geothermal energy stability, the system can be widely applied to different climate types. The system is mainly composed of a geothermal energy terminal system, a closed circulating water system, a semi-centralized heating and cooling air-conditioning system, and an automatic control system. The operation control modes of the ground source system include: mode 1, the waste heat in the building can meet the demand by itself, and the ground source system is closed; mode 2, the closed circulating water system uses geothermal energy for direct heat exchange, the ground source unit is closed, and the water pump is running ;Mode 3, when the temperature in the closed circulating water system exceeds the set upper limit, the ground source unit turns on the cooling condition, and the temperature adjustment of the closed circulating water in the ground source evaporative heat exchanger is completed until it meets the requirements; Mode 4, closed When the temperature in the circulating water system is lower than the set lower limit, the ground source unit turns on the heating mode, and the temperature adjustment of the closed circulating water is completed in the ground source condensing heat exchanger until it meets the requirements. Through the switching of four modes, the air-conditioning system makes full use of the waste heat in the building, and at the same time efficiently utilizes low-grade geothermal energy.

Referring to Fig. 1, the water loop heat pump air-conditioning system provided by the present invention uses geothermal energy as a single auxiliary cold and heat source. Closed circulating water system for system heat dissipation and heat absorption and automatic control system for controlling ground source and user end air conditioning systems;

The ground source system includes a compressor 1, a four-way valve 2, a gas-liquid separator 3, and a water-water heat exchanger 4, an evaporation heat exchanger 5, a condensation heat exchanger 6, an expansion valve 7, and a first valve. 8. The function switching area 12 composed of the second valve 9, the third valve 10, and the fourth valve 11;

The user-side air-conditioning system includes a heating-side heat exchanger 13 and a cooling-side heat exchanger 14;

The closed circulating water system is a circulating water system that accepts the water-water heat exchanger 4, the evaporative heat exchanger 5, and the end-user heat supply end heat exchanger 13 and the cooling end heat exchanger 14 to discharge heat and absorb heat, wherein A temperature sensor 15 is installed to control the circulating water temperature;

Automatic control system comprises temperature sensor 15, control panel and control program circuit board; Wherein,

The outlet of compressor 1 is connected to the first port of four-way valve 2, the second port of four-way valve 2 is connected to the inlet of gas-liquid separator 3, and the outlet of gas-liquid separator 3 is connected to the inlet of compressor 1;

The third port and the fourth port of the four-way valve 2 are respectively connected to the evaporating heat exchanger 5 and the condensing heat exchanger 6, and the evaporating heat exchanger 5 is connected to the condensing heat exchanger 6 through the expansion valve 7; the evaporating heat exchanger 5 circulates The water outlet is connected to the heat exchanger 13 at the heating end and the heat exchanger 14 at the cooling end, and returns to the evaporating heat exchanger 5 through the second valve 9;

The circulating water at the ground source end is connected to the water-water heat exchanger 4 through the third valve 10, and connected to the condensing heat exchanger 6 through the fourth valve 10;

The user end of the water-water heat exchanger 4 is respectively connected to the heat exchanger 13 at the heating end and the heat exchanger 14 at the cooling end through the first valve 8, and accepts heat absorption and heat release at the user end;

The temperature probe of the temperature sensor 15 is connected to the closed circulating water system, and is arranged in the upstream dry pipe area of the inlet of the heat exchanger 13 at the heating end and the heat exchanger 14 at the cooling end, so that the probe end of the temperature sensor 15 can monitor the The water temperature after heat exchange with the soil at the water-water heat exchanger 4 user end.

The heat exchange working medium in the evaporating heat exchanger 5 and the condensing heat exchanger 6 are circulating water and refrigeration working medium respectively, and one end of the heat exchange working medium in the water-water heat exchanger 4 is circulating water, and the other end is the ground source circulation water;

The water-water heat exchanger 4 adopts a plate heat exchanger, and the evaporating heat exchanger 5 and condensing heat exchanger 6 adopt plate and casing heat exchangers.

The heat extraction method at the ground source end adopts vertical or horizontal buried pipes.

The user-side air-conditioning system adopts any of the user's individual refrigeration units in the traditional water-loop heat pump system, or semi-centralized air-conditioning units that separate cooling and heating and divide according to user needs.

Semi-centralized air-conditioning units use air-cooled air conditioners or multi-connected inverter air conditioners.

The selected air-conditioning units can be divided into air-cooled air conditioners, or multi-connected inverter air conditioners to meet the heating and cooling needs of the building at the same time.

In the present invention, according to the cooling and heating load structure in different buildings, by setting the upper and lower limits of the control temperature of the user's heat exchanger inlet in the closed circulating water system, it is divided into four operating modes. The applicable conditions and adjustment methods of the four operating modes will be described below in conjunction with the accompanying drawings.

Mode 1: self-sufficiency mode. At this time, the residual heat in the building can meet the needs by itself, and the temperature sensor 15 senses that the temperature is within the temperature limit set by the user. At this time, the compressor 1 is closed, the four-way valve 2 does not operate, the function adjustment valve 9 is opened, and the valves 8, 10, and 11 are closed. , the ground source pump is turned off.

Cooling water flow: the cooling water flows through the heat exchanger 13 of the heating section at the user end and the heat exchanger 14 at the cooling end of the user. After releasing heat and obtaining heat respectively, the cooling water re-enters the heat exchanger at the heating and cooling end of the user through the function regulating valve 9 13, 14. At this time, only the waste heat inside the building can be used to meet the performance requirements of the simultaneous heating and cooling system.

Mode 2: When the self-sufficiency mode cannot meet the demand, start the ground source side circulation heat exchange mode, that is, mode 2. At this time and then, the circulating water system directly uses geothermal energy for heat exchange without turning on the ground source side additional cold and heat source unit. In mode 2, the temperature sensor 15 senses that the temperature exceeds the limit set by the user. At this time, the compressor 1 is turned off, the four-way valve 2 is inactive, the function adjustment valves 8 and 10 are turned on, the valves 9 and 11 are turned off, and the ground source water pump is turned on.

Cooling water flow: the cooling water flows through the heat exchanger 13 of the heating section at the user end and the heat exchanger 14 at the cooling end of the user, and after releasing heat and gaining heat respectively, the cooling water enters the water-water heat exchanger 4 and the ground source through the function regulating valve 8 End circulating water heat exchange. At this time, only using the waste heat inside the building can no longer meet the performance requirements of the heating and cooling system at the same time. The closed circulation water system uses geothermal energy to directly exchange heat to meet user needs.

Mode 3: Under the operating condition of mode 2, when the temperature in the closed circulating water system in the circulation heat exchange mode still exceeds the set upper limit, the additional cooling mode is started, that is, mode 3. At this time, the ground source unit turns on the cooling mode, and completes the temperature adjustment of the closed loop water in the ground source evaporative heat exchanger until it meets the requirements. In mode 2, the temperature sensor 15 senses that the temperature exceeds the upper limit set by the user. At this time, the compressor 1 is turned on, and the four-way valve 2 acts to adjust the flow of the refrigerant to complete the setting of the cooling condition. The function adjustment valves 9 and 11 are opened, and the valves 8, 10 is closed, and the ground source end water pump is opened.

Cooling water flow: the cooling water flows through the heat exchanger 13 of the heating section at the user end and the heat exchanger 14 at the cooling end of the user. After releasing heat and gaining heat respectively, the cooling water enters the evaporative heat exchanger 5 through the function regulating valve 9, and communicates with the heat exchanger 5 from the refrigeration plant. Refrigerant heat exchange under conditions.

Refrigerant flow: After being compressed by the compressor 1, the refrigerant turns to the condensation heat exchanger 6 through the four-way valve 2 to exchange heat with the water in the U-shaped pipe from the ground source, expands through the expansion valve 7, and enters the evaporation heat exchange The device 5 exchanges heat with the closed circulating water, thereby adjusting the temperature of the closed circulating water to meet the set requirements.

Mode 4: Under the operating condition of mode 2, when the temperature in the closed circulating water system in the heat exchange mode is still lower than the set upper limit, the additional heating mode is started, that is, mode 4. At this time, the ground source unit turns on the heating condition, and completes the temperature adjustment of the closed circulating water in the ground source condensing heat exchanger until it meets the requirements. In mode 2, the temperature sensor 15 senses that the temperature exceeds the lower limit set by the user. At this time, the compressor 1 is turned on, and the four-way valve 2 operates to adjust the refrigerant flow direction to complete the setting of the heating condition. The function adjustment valves 9 and 11 are opened, and the valve 8 , 10 is off, and the ground source pump is on.

Cooling water flow: the cooling water flows through the heat exchanger 13 of the heating section at the user end and the heat exchanger 14 at the cooling end of the user. After releasing heat and obtaining heat respectively, the cooling water enters the condensing heat exchanger 5 through the function regulating valve 9, and is connected with the heat exchanger 5 from the heat supply. Refrigerant heat exchange under working conditions.

Refrigerant flow: After being compressed by compressor 1, the refrigerant turns to condensing heat exchanger 5 through four-way valve 2 to exchange heat with closed circulating water, expands through expansion valve 7, enters evaporating heat exchanger 6 and communicates with ground source Heat exchange with the water in the U-shaped tube at the end, so as to adjust the temperature of the closed circulating water to meet the set requirements.

Automatic control mode: automatic control and manual control, or both. The drive controller for automatic control mainly includes a temperature sensor control panel and a control program circuit board, which can be controlled by a PLC circuit board but is not limited to this control method.

The invention is an optimized water ring heat pump air conditioning system which effectively utilizes geothermal energy as a single auxiliary cold and heat source. The invention is mainly aimed at the problems existing in the traditional water loop heat pump system that can meet the simultaneous heating and cooling needs of buildings, that is, the system needs to be equipped with auxiliary heating and cooling devices such as cooling towers and boilers, which is contrary to the hierarchical utilization of energy and seriously wastes high-level energy. And lead to complex equipment, in addition, the user end adopts a unitary unit, resulting in a large difference in the change of the user end working conditions and increasing the difficulty of system control. The air-conditioning system in the present invention mainly includes geothermal energy terminal system, closed circulating water system, semi-centralized/split heating and cooling air-conditioning system, automatic control system, etc., making full use of building waste heat and low-grade geothermal energy. The four operating modes of the air-conditioning system in the present invention conform to energy classification utilization, and can satisfy buildings with different cooling and heating load structures, and have flexibility and wide applicability. The magnetic field self-increasing permanent magnet wind power generator involved in the present invention has simple structure and It has the advantages of high torque density, strong low-speed high-torque direct drive capability, small output torque fluctuation, and high power factor.

The above descriptions are only preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments, but all equivalent modifications or changes made by those of ordinary skill in the art according to the disclosure of the present invention should be included within the scope of protection described in the claims.

Claims (6)

1. A water loop heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source, characterized in that the air-conditioning system includes a ground-source system, a user-side air-conditioning system connected to the ground-source system, and a receiving user-side air conditioner Closed circulating water system for system heat dissipation and heat absorption and automatic control system for controlling ground source and user end air conditioning systems; The ground source system includes a compressor (1), a four-way valve (2), a gas-liquid separator (3), and a water-water heat exchanger (4), an evaporative heat exchanger (5), and a condensation heat exchanger. Function switching area (12) composed of valve (6), expansion valve (7), first valve (8), second valve (9), third valve (10) and fourth valve (11); The user-side air-conditioning system includes a heating-side heat exchanger (13) and a cooling-side heat exchanger (14); The closed circulating water system is for receiving water-water heat exchanger (4), evaporating heat exchanger (5), end-user heating end heat exchanger (13) and cooling end heat exchanger (14) to discharge heat and absorb heat A heat circulating water system, in which a temperature sensor (15) is installed to control the temperature of the circulating water; The automatic control system includes a temperature sensor (15), a control panel and a control program circuit board; wherein, The outlet of the compressor (1) is connected to the first port of the four-way valve (2), the second port of the four-way valve (2) is connected to the inlet of the gas-liquid separator (3), and the outlet of the gas-liquid separator (3) is connected to the compressor Machine (1) entrance is connected; The third and fourth ports of the four-way valve (2) are respectively connected to the evaporating heat exchanger (5) and the condensing heat exchanger (6), and the evaporating heat exchanger (5) and the condensing heat exchanger (6) The valve (7) is connected; the outlet port of the circulating water of the evaporating heat exchanger (5) is connected with the heat exchanger (13) at the heating end and the heat exchanger (14) at the cooling end, and returns to the evaporator through the second valve (9). heat exchanger (5); The circulating water at the ground source end is connected to the water-water heat exchanger (4) through the third valve (10), and connected to the condensing heat exchanger (6) through the fourth valve (10); The user end of the water-water heat exchanger (4) is respectively connected to the heat exchanger at the heating end (13) and the heat exchanger at the cooling end (14) through the first valve (8), and receives the heat absorbed and released by the user end; The temperature probe of the temperature sensor (15) is connected to the closed circulating water system, and is arranged in the upstream dry pipe area of the inlet of the heat exchanger (13) at the heating end and the heat exchanger (14) at the cooling end, so that the temperature when the function is switched The probe end of the sensor (15) monitors the water temperature after the heat exchange between the user end of the water-water heat exchanger (4) and the soil. 2. The water loop heat pump air conditioning system using geothermal energy as a single auxiliary cold and heat source according to claim 1, characterized in that the heat exchange in the evaporating heat exchanger (5) and the condensing heat exchanger (6) The working medium is circulating water and refrigeration working medium respectively, and one end of the heat exchange working medium in the water-water heat exchanger (4) is circulating water, and the other end is circulating water at the ground source. 3. The water loop heat pump air conditioning system using geothermal energy as a single auxiliary cold and heat source according to claim 1, characterized in that the water-water heat exchanger (4) adopts a plate heat exchanger, and the evaporative heat exchanger (5) Condensing heat exchanger (6) adopts plate type and sleeve type heat exchanger. 4. The water loop heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source according to claim 1, characterized in that the heat extraction method at the ground source end adopts vertical buried pipes or horizontal buried pipes. 5. The water-ring heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source according to claim 1, wherein the user-side air-conditioning system adopts a user-unit refrigeration unit in a traditional water-ring heat pump system, or Any of the semi-centralized air-conditioning units that separate cooling and heating and are divided according to user needs. 6. The water-loop heat pump air-conditioning system using geothermal energy as a single auxiliary cold and heat source according to claim 5, wherein the semi-centralized air-conditioning unit adopts an air-cooled air conditioner or a multi-connected inverter air conditioner. the

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