CN104613674A - Soil source fuel gas heat pump supplying heat, cool and hot water system - Google Patents

Abstract

The invention discloses a soil source gas heat pump heating, cooling and hot water supply system, comprising a buried pipe heat exchanger, the buried pipe heat exchanger and a connected water source gas heat pump unit form a circulation loop 1, The water source gas heat pump unit is respectively connected with the heat recovery heat exchanger and the air conditioner terminal equipment to form the circulation loop two and the circulation loop three, and the heat recovery heat exchanger is respectively connected with the domestic hot water heat exchanger and the domestic heat exchanger. The water storage tank forms circulation loop four and circulation loop five, the domestic hot water heat exchanger and the water source gas heat pump unit form circulation loop six, the circulation loop one, circulation loop two, circulation loop three, circulation loop four, Both circulation loop five and circulation loop six are connected with the matching domestic hot water supply controller of the system. The invention has the beneficial effects of high operating efficiency, energy saving, no damage to underground water resources, wide applicability, high degree of automation, and scientific and reasonable control.

Description

Soil source gas heat pump heating, cooling and hot water supply system

the

technical field

The invention relates to a soil source gas heat pump system for heating, cooling and hot water supply.

Background technique

Ground source heat pump is a new type of air-conditioning technology that uses shallow ground energy for heating and cooling, which is highly efficient, energy-saving and environmentally friendly. The ground source heat pump utilizes the huge heat storage and cold storage capacity of the underground soil, through the pipeline system buried deep around the building or under the floor, adopts the heat pump principle, and realizes the transfer of low-level heat energy to high-level heat energy through a small amount of high-level electric energy input, so that the underground A technology for heat exchange between rock and soil mass and buildings.

The ground source heat pump air conditioning system is mainly divided into three parts: the outdoor buried pipe heat exchange system, the heat pump unit system and the indoor heating and air conditioning terminal system; through the outdoor buried pipe heat exchange system, the heat pump unit absorbs heat from the underground rock and soil in winter. The heat is used to heat the building; in summer, the heat pump unit absorbs heat from the room and transfers it to the underground rock and soil mass to realize the air conditioning and cooling of the building; the cold source water and hot source water provided by the buried pipe heat exchange system for the heat pump unit The temperature is close to the underground temperature, which is lower than the outdoor air temperature in summer and higher than the outdoor air temperature in winter. Therefore, compared with the traditional air-cooled heat pump air conditioning system, the ground source heat pump has a higher energy efficiency ratio and can significantly save energy.

Gas-fired water-source heat pump: Gas-fired water-source heat pumps use gas engines to drive compressors, and use groundwater, surface water, sewage, etc. as cold and heat sources, which have high energy-saving effects. , can make more full use of fuel, and has a higher utilization rate of primary energy; ②The compressor driven by the gas engine can continuously change the speed to realize continuous adjustment of the cooling capacity, and the coefficient of performance of the refrigeration compressor remains unchanged, so the gas- Water source heat pumps have a strong variable load adjustment capability; ③Because natural gas is a clean fuel, no ash is produced during the combustion process, and the emissions after combustion are less, which can reduce the emission of greenhouse gases and air pollutants; ④Develop gas-fired air conditioners , can make up for the trough of gas consumption in the city in summer, and play a role in peak regulation; ⑤ During winter operation, use the waste heat of the gas engine to defrost, which can reduce or even eliminate the reverse flow of refrigerant to defrost, improving the heat supply quality and reliable operation of the heat pump unit It improves the heating coefficient of performance of the heat pump unit and can operate at a lower ambient temperature, which is suitable for most areas in China; ⑥Compared with air source heat pumps, it has a higher energy efficiency ratio.

The soil source heat pump system formed by the combination of electric drive water source heat pump and buried pipe heat exchanger has been widely used. water.

However, the existing water-source gas heat pumps have the following disadvantages: 1. The underground water-source gas-fired heat pump is not easy to pass the government approval, and it is easy to damage and pollute the groundwater resources. It is difficult to find surface water resources that are stable, abundant, and suitable for water quality and temperature throughout the year near the construction project, and the temperature of the surface water is generally close to the outdoor air temperature, and the operating efficiency of the unit is not high.

Aiming at the problems in the related technologies, no effective solution has been proposed yet.

Contents of the invention

The purpose of the present invention is to provide a soil source gas heat pump heating, cooling and hot water supply system, which can improve the operating efficiency of the system, save energy consumption of the system, and provide domestic heat throughout the year while heating in winter and cooling in summer. Water and recover the cooling waste heat of the gas engine, rationally control the system to produce domestic hot water, and the highly automated soil source gas heat pump heating, cooling and hot water supply systems effectively overcome the above-mentioned deficiencies in the current existing technology.

The purpose of the present invention is to realize through the following technical solutions:

A soil source gas heat pump heating, cooling and hot water supply system, including a buried pipe heat exchanger, the buried pipe heat exchanger and the connected water source gas heat pump unit form a circulation loop 1, the water source gas The heat pump unit is connected with the heat recovery heat exchanger and the air-conditioning terminal equipment to form the second circulation loop and the third circulation loop. The heat recovery heat exchanger is respectively connected with the domestic hot water heat exchanger and the domestic hot water storage tank. Circulation loop 4 and circulation loop 5, the domestic hot water heat exchanger and the water source gas heat pump unit form circulation loop 6, the circulation loop 1, circulation loop 2, circulation loop 3, circulation loop 4, circulation loop 5 and The circulation loops six are all connected with the domestic hot water supply controller.

Further, the circulation loop one includes two buried pipe heat exchanger maintenance shut-off valves connected with the water source gas heat pump unit and the buried pipe heat exchanger, wherein the buried pipe heat exchanger A buried pipe circulating pump is provided between the output end and the overhaul shut-off valve of the buried pipe heat exchanger.

Further, the second circulation loop includes two heat recovery heat exchanger maintenance shut-off valves connected to the water source gas heat pump unit and the heat recovery heat exchanger, wherein the output end of the heat recovery heat exchanger is connected to the A heat recovery circulation pump is arranged between the maintenance shut-off valves of the heat recovery heat exchanger.

Further, the circulation loop three includes two air-conditioning water electric valves connected with the water source gas heat pump unit and the air-conditioning terminal equipment, wherein, an air-conditioning water electric valve is provided between the output end of the air-conditioning terminal equipment and the air-conditioning water electric valve. There is an air conditioning water circulation pump.

Further, the circulation loop four includes two electric valves of the heat recovery heat exchanger connected to the input end and the output end of the heat recovery heat exchanger, and the electric valves of the heat recovery heat exchanger exchange heat through domestic hot water The electric valve of the domestic hot water heat exchanger is connected with the domestic hot water heat exchanger, wherein, the electric valve of the domestic hot water heat exchanger at the output end of the domestic hot water heat exchanger is set between the electric valve of the heat recovery heat exchanger There is a domestic hot water circulation pump.

Further, the circulation loop five includes a heat recovery heat exchanger, the heat recovery heat exchanger is connected to the domestic hot water storage tank through two electric valves of the heat recovery heat exchanger, and the domestic hot water storage tank A domestic hot water circulation pump is provided between the output end of the water tank and the electric valve of the heat recovery heat exchanger.

Further, the circulation loop six includes a water-source gas heat pump unit, and the input and output ends of the water-source gas heat pump unit exchange heat with the domestic hot water through the air-conditioning water electric valve and the domestic hot water heat exchanger electric valve two in sequence. The electric valve of the domestic hot water heat exchanger at the output end of the domestic hot water heat exchanger is connected with the electric valve of the air conditioning water.

Further, the water source gas heat pump unit is connected with a gas emergency shutdown valve, and a gas meter is provided between the water source gas heat pump unit and the gas emergency shutdown valve.

Further, the domestic hot water storage tank is provided with a temperature sensor.

The beneficial effects of the present invention are:

1. High operating efficiency and energy saving. Compared with the existing gas heat pump system, the present invention uses the circulating water after the heat exchange between the buried pipe heat exchanger and the soil as the water source, and combines the gas heat pump system and the soil source heat pump system Combining the advantages of natural gas, it can save energy while directly using gas and improving the efficiency of primary energy utilization; since the underground soil is warm in winter and cool in summer, using the circulating water of the buried pipe heat exchanger as the water source can improve the efficiency of the gas heat pump operation, thereby reducing power consumption;

2. No damage to underground water resources. Compared with the existing water source gas heat pump system, the present invention uses circulating water after heat exchange between the buried pipe heat exchanger and the soil as the water source, does not exploit ground water, does not use surface water, and does not damage ground water resources, avoiding the common problem of common water source heat pump systems destroying groundwater and surface water resources, and protecting the water environment while saving energy;

3. Wide applicability. Compared with the existing water source gas heat pump system, the present invention does not need to use ground water or surface water, and can be used as long as there is a certain open space around the building;

4. The degree of automation is high. The present invention is equipped with a domestic hot water supply controller and a domestic hot water supply controller, which can intelligently control each component of the system. Compared with the existing water source gas heat pump system, the heat recovery and production of domestic heat The water has a high degree of automation, and the control is scientific and reasonable.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a soil source gas heat pump heating, cooling and hot water supply system according to an embodiment of the present invention.

In the picture:

1. Water source gas heat pump unit; 2. Buried pipe heat exchanger; 3. Air conditioning terminal equipment; 4. Heat recovery heat exchanger; 5. Domestic hot water heat exchanger; 6. Domestic hot water storage tank; 7. Buried Pipe circulation pump; 8. Heat recovery circulation pump; 9. Domestic hot water circulation pump; 10. Air conditioning water circulation pump; 11. Domestic hot water supply controller; 12. Gas meter; 13. Gas emergency shut-off valve; 14. Air conditioner Water electric valve; 15. Domestic hot water heat exchanger electric valve 1; 16. Heat recovery heat exchanger maintenance shut-off valve; 17. Heat recovery heat exchanger electric valve; 18. Buried pipe heat exchanger maintenance shut-off valve ; 19, temperature sensor; 20, domestic hot water heat exchanger electric valve two.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in Figure 1, a soil source gas heat pump heating, cooling and hot water supply system according to an embodiment of the present invention includes a buried pipe heat exchanger 2, which is connected to The water source gas heat pump unit 1 constitutes the first circulation loop, and the water source gas heat pump unit 1 forms the second circulation loop and the third circulation loop respectively with the heat recovery heat exchanger 4 connected to it and the air conditioner terminal equipment 3, and the heat recovery heat exchanger 4 The domestic hot water heat exchanger 5 and the domestic hot water storage tank 6 connected to each other form the circulation loop four and the circulation loop five respectively, and the domestic hot water heat exchanger 5 and the water source gas heat pump unit 1 form the circulation loop six , the circulation loop 1, circulation loop 2, circulation loop 3, circulation loop 4, circulation loop 5 and circulation loop 6 are all connected to the domestic hot water supply controller 11 .

Said circulation loop one includes two buried pipe heat exchanger maintenance shut-off valves 18 connected with said water source gas heat pump unit 1 and buried pipe heat exchanger 2, wherein said buried pipe heat exchanger 2 A buried pipe circulation pump 7 is provided between the output end of the buried pipe heat exchanger and the maintenance shut-off valve 18 of the buried pipe heat exchanger.

The second circulation loop includes two heat recovery heat exchanger maintenance shut-off valves 16 connected to the water source gas heat pump unit 1 and the heat recovery heat exchanger 4, wherein the output end of the heat recovery heat exchanger 4 A heat recovery circulating pump 8 is provided between the maintenance shut-off valve 16 of the heat recovery heat exchanger; wherein, the maintenance shut-off valve 16 of the heat recovery heat exchanger can be shut off during the maintenance of the heat exchanger to ensure that Ensure personal safety during maintenance.

The circulation loop three includes two air-conditioning water electric valves 14 connected with the water source gas heat pump unit 1 and the air-conditioning terminal equipment 3, wherein the output end of the air-conditioning terminal equipment 3 and the air-conditioning water electric valve 14 There are 10 air-conditioning water circulation pumps in the room.

The circulation loop four includes two heat recovery heat exchanger electric valves 17 connected to the input and output ends of the heat recovery heat exchanger 4, and the heat recovery heat exchanger electric valves 17 exchange heat through domestic hot water Electric valve one 15 of the domestic hot water heat exchanger is connected with the domestic hot water heat exchanger 5, wherein, the electric valve one 15 of the domestic hot water heat exchanger at the output end of the domestic hot water heat exchanger 5 is electrically connected with the heat recovery heat exchanger A domestic hot water circulating pump 9 is arranged between the valves 17 .

The circulation loop five includes a heat recovery heat exchanger 4, the heat recovery heat exchanger 4 is connected to the domestic hot water storage tank 6 through two heat recovery heat exchanger electric valves 17, and the domestic hot water A domestic hot water circulation pump 9 is provided between the output end of the water storage tank 6 and the electric valve 17 of the heat recovery heat exchanger.

The circulation loop six includes a water source gas heat pump unit 1, the input end and output end of the water source gas heat pump unit 1 are exchanged with the domestic hot water through the air conditioner water electric valve 14 and the domestic hot water heat exchanger electric valve 220 sequentially. The heat exchangers 5 are connected, wherein, the electric valve 2 of the domestic hot water heat exchanger at the output end of the domestic hot water heat exchanger 5 and the electric valve 14 of the air-conditioning water are provided with an air-conditioning water circulating pump 10 .

The water source gas heat pump unit 1 is connected with a gas emergency shut-off valve 13, a gas meter 12 is provided between the water source gas heat pump unit 1 and the gas emergency shut-off valve 13, and the gas emergency shut-off valve 13 can be connected with The combustible gas alarm system of the fire protection system in the building shuts off the gas pipeline in chains. When the system fails, the entire system is shut down in time to avoid heavy losses and effectively improve the safety and reliability of the system operation. The gas meter 12 is generally provided by Installed by the gas company, it can measure the gas consumption and energy consumption of the system, which is convenient for grasping the energy consumption and energy saving of the system.

The domestic hot water storage tank 6 is provided with a temperature sensor 19, the temperature sensor 19 detects the water temperature in the domestic hot water storage tank 6, and sends the information to the domestic hot water supply controller 11, so as to adjust the system in time. control status. the

Among them, the water source gas heat pump unit 1 in the present invention uses the buried pipe heat exchange system as the cold and heat source of the water source gas heat pump, and the water source uses circulating water after heat exchange with the soil through the buried pipe heat exchanger 2 .

The heat recovery heat exchanger 4 in the present invention can be made by using the existing technology, and the waste heat of the gas engine in the water source gas heat pump unit 1 can be recovered to produce domestic hot water; driven by the heat recovery circulation pump 8 , the engine and flue gas cooling water in the water source gas heat pump unit 1 flow through the heat recovery heat exchanger 4 to exchange heat with the water in the domestic hot water storage tank 6, and in the domestic hot water circulation pump 9 Driven by the driving force, the water in the domestic hot water storage tank 6 flows through the heat recovery heat exchanger 4 again to form a circulation system, wherein the heat recovery heat exchanger 4 can adopt a sleeve A tube heat exchanger or a plate heat exchanger; the domestic hot water storage tank 6 can be a stainless steel or galvanized steel insulation closed storage tank made of existing technology.

The domestic hot water heat exchanger 5 in the present invention can be made by using the existing technology, and can exchange heat between the hot water in the domestic hot water storage tank 6 and the air-conditioning heating hot water provided by the water source gas heat pump unit 1 Domestic hot water, driven by the air-conditioning water circulation pump 10, the air-conditioning heating hot water provided by the water source gas heat pump unit 1 in winter and transition season flows through the domestic hot water heat exchanger 5 and the domestic hot water storage The water in the water tank 6 is heat-exchanged; wherein, the domestic hot water heat exchanger 5 can be a casing heat exchanger or a plate heat exchanger made by the prior art.

The present invention is provided with the domestic hot water supply controller 11, according to the temperature value of the temperature sensor 19, controls the heat recovery circulation pump 8, the domestic hot water circulation pump 9, the air-conditioning water electric valve 14, and the domestic hot water heat exchanger Electric valve one 15, electric valve two 20 of domestic hot water heat exchanger and electric valve 17 of heat recovery heat exchanger act to scientifically and rationally produce domestic hot water.

In specific use, the buried pipe circulation pump 7 and the air-conditioning water circulation pump 10 in this device run when the water source gas heat pump unit 1 is turned on, and start up before the water source gas heat pump unit.

The first electric valve 15 of the domestic hot water heat exchanger, the second electric valve 20 of the domestic hot water heat exchanger, and the electric valve 17 of the heat recovery heat exchanger are all electric regulating valves, which can adjust the valve opening according to the control signal, and can be adjusted according to the control signal. The domestic hot water heat exchanger 8 , the air conditioner terminal equipment 3 , the domestic hot water heat exchanger 5 and the heat recovery heat exchanger 4 need to be adjusted in advance to meet the hydraulic balance requirements, and the set maximum opening degree is determined in advance.

The water source gas heat pump unit 1 is generally equipped with a four-way reversing valve and equipped with a unit control system. In winter and transitional seasons, the water source gas heat pump unit 1 is controlled by the manual or building control system through the unit's own control system. Switch it from the cooling working condition to the heating working condition; the unit is in the cooling working condition in summer and cannot provide heat for domestic hot water production through the domestic hot water heat exchanger 5, but the outdoor temperature is relatively high in summer , the tap water temperature is high, the bathing water temperature demand is low, and the air conditioning load is large, and the gas consumption is large. Generally, the engine heat dissipation and flue gas waste heat of the gas heat pump unit recovered by the heat recovery heat exchanger 4 can meet the demand for domestic hot water. If the heat demand cannot be met, the existing technology can be used to supplement the heat with a hot water electric heater.

There are three specific control strategies:

(a) During the cooling season, when the unit is in the cooling condition, the domestic hot water supply controller 11 according to the present invention is switched to the corresponding working condition of the unit for cooling by manual setting or receiving a signal from the building control system; that is The present invention uses the heat recovery heat exchanger 4 to recover the waste heat of the gas engine in the water source gas heat pump unit 1 to produce domestic hot water. The heat recovery circulation pump 8 and the domestic hot water circulation pump 9 The temperature value of the water tank temperature sensor 19 runs, the temperature value of the hot water tank temperature sensor 19 is lower than the upper limit setting value (for example, 58 degrees), and the operation is started, and the temperature value of the hot water tank temperature sensor 19 is higher than the upper limit setting value (such as 58 degrees) when the shutdown.

When the temperature value of the hot water tank continues to drop below the lower limit set value (such as 45 degrees), the domestic hot water supply controller 11 sends a start signal to an external heater (such as an electric heater) to start the external heater to heat Hot water in the domestic hot water tank 6. External heaters (such as electric heaters) may be existing electric heaters for hot water, and are not part of the present invention. At the same time, in the cooling season, the electric valve 17 of the heat recovery heat exchanger is opened at the maximum opening, the electric valve one 15 of the domestic hot water heat exchanger and the electric valve two 20 of the domestic hot water heat exchanger are closed, so Keeping the air-conditioning water electric valve 14 open does not affect the cooling of the system.

(b) In winter or transition season, when the unit is in the heating condition, switch the domestic hot water supply controller 11 of the present invention to the corresponding working condition when the unit is heating by manually setting or receiving the building control system signal ; that is, the present invention preferentially uses the heat recovery heat exchanger 4 to recover the waste heat of the gas engine in the water source gas heat pump unit 1 to produce domestic hot water, and the heat recovery circulation pump 8 and the domestic hot water circulation pump 9 according to the According to the temperature value of the domestic hot water tank temperature sensor 19, the operation starts when the temperature value of the hot water tank temperature sensor 19 is lower than the upper limit setting value (such as 58 degrees), and the temperature value of the hot water tank temperature sensor 19 is higher than the upper limit setting value. Stop at the limit set value (such as 58 degrees).

When the temperature value of the hot water tank continues to drop below the low set value (such as 45 degrees), the domestic hot water supply controller 11 will supply the electric valve 15 of the domestic hot water heat exchanger and the domestic hot water heat exchanger The electric valve two 20 sends an opening signal, and confirms the operating status of the water source gas heat pump unit 1 and the air-conditioning water circulation pump 10, the electric valve 17 of the heat recovery heat exchanger is kept at the maximum opening state, and the living When the electric valve 15 of the hot water heat exchanger is opened, it opens at the minimum opening degree. Driven by the air-conditioning water circulation pump 10, part of the air-conditioning hot water provided by the water source gas heat pump unit 1 flows to the air-conditioning terminal equipment 3, and the other part The bypass flows through the domestic hot water heat exchanger 5 to exchange heat with the water in the domestic hot water storage tank 6 to produce domestic hot water.

After the air-conditioning hot water supply is bypassed, the return water temperature of the air-conditioning hot water drops, and the unit control system of the water source gas heat pump unit 1 can automatically increase the heat supply of the unit according to the change of the return water temperature, ensuring the indoor air-conditioning effect and the effect of hot water production, for example, after opening the domestic hot water heat exchanger electric valve 15 and the domestic hot water heat exchanger electric valve 2 20 at the minimum opening, the temperature value of the domestic hot water tank temperature sensor 19 continues to drop to the set value. Set a lower limit (such as 42 degrees), then the domestic hot water supply controller 11 sends control commands to the electric valve 15 of the domestic hot water heat exchanger and the electric valve 2 20 of the domestic hot water heat exchanger to set Open the domestic hot water heat exchanger electric valve one 15 and the domestic hot water heat exchanger electric valve two 20 at a certain maximum opening, increase the circulating water flow of the domestic hot water heat exchanger 5, and then increase its heat transfer capacity.

(c) In the transitional season, when the building’s air-conditioning system is shut down, set the water source gas heat pump unit 1 as the heating condition, and supply domestic hot water according to the present invention by manually setting or receiving the building control system signal The controller 11 switches to the corresponding working condition when the air conditioning system is shut down, that is, the hot water supply of the water source gas heat pump unit 1, the waste heat recovery of the internal gas engine, and the hot water supply of the air conditioner provided by the unit are used to produce domestic hot water at the same time. ; The water source gas heat pump unit 1, the heat recovery circulation pump 8, the domestic hot water circulation pump 9 and the air-conditioning water circulation pump 10 operate according to the temperature value of the domestic hot water tank temperature sensor 19, and the temperature value of the hot water tank temperature sensor 19 is lower than When the upper limit setting value (such as 58 degrees) starts the heat recovery circulation pump 8, the domestic hot water circulation pump 9 and the air conditioning water circulation pump 10 to run, the temperature value of the hot water tank temperature sensor 19 is higher than the high limit setting value (such as 58 degrees Celsius) degrees) stop. The first electric valve 15 of the domestic hot water heat exchanger and the second electric valve 20 of the domestic hot water heat exchanger are kept open at the maximum opening degree, and the electric valve 17 of the heat recovery heat exchanger is also opened at the set maximum opening degree .

Wherein, the electric valve 17 of the heat recovery heat exchanger is opened with a set maximum opening, which means that the domestic hot water heat exchanger 5 and the air conditioner terminal equipment 3, the domestic hot water heat exchanger 5 and the The hydraulic balance of the heat recovery heat exchanger 4 needs to be the maximum opening set by the standard. This opening can be used in the specific application of the building, according to the specific conditions of the building's air conditioning system and hot water system, according to the existing technology. Determined after performing hydraulic calculations.

The domestic hot water supply controller 11 can be made using existing technology, such as using a general-purpose PLC-based intelligent controller, and the control program can be compiled using the development tools provided by the PLC manufacturer according to the control strategies of the above three working conditions.

The domestic hot water tank temperature sensor 19 can be made of a Pt100 platinum resistor and a matching temperature transmitter, and can transmit the temperature of hot water in the domestic hot water storage tank 6 to the domestic hot water supply controller 11 .

Compared with the existing gas heat pump system, this device has the characteristics of high operating efficiency and energy saving, and uses the circulating water after the heat exchange between the buried pipe heat exchanger and the soil as the water source, combining the gas heat pump system and The advantages of the ground source heat pump system are combined to save energy while directly using gas and improving primary energy utilization efficiency; because the underground soil is warm in winter and cool in summer, using the circulating water of the buried pipe heat exchanger as the water source can improve the efficiency of the gas heat pump. operating efficiency, thereby reducing power consumption.

In addition, compared with the existing water-source gas heat pump system, this device also has the characteristics of not damaging groundwater resources. By using the circulating water after the heat exchange between the buried pipe heat exchanger and the soil as the water source, no groundwater is exploited, and no surface water is used. Water, does not damage groundwater resources, avoids the common problem of common water source heat pump systems destroying groundwater and surface water resources, and protects the water environment while saving energy.

Compared with the existing water source gas heat pump system, the present invention does not need to use ground water or surface water, and can be used as long as there is a certain space around the building, and has wide applicability; and this device also has the characteristics of high degree of automation, through the installation of domestic heat pump The water supply controller and the domestic hot water supply controller can intelligently control each component of the system. Compared with the existing water source gas heat pump system, the heat recovery and domestic hot water production are highly automated, and the control is scientific and reasonable.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. A soil source gas heat pump heating, cooling and hot water supply system, including a buried pipe heat exchanger (2), characterized in that the buried pipe heat exchanger (2) is connected to the water source The gas heat pump unit (1) constitutes the first circulation loop, and the water source gas heat pump unit (1) respectively forms the second circulation loop and the third circulation loop with the connected heat recovery heat exchanger (4) and air-conditioning terminal equipment (3). The heat recovery heat exchanger (4) is respectively connected with the domestic hot water heat exchanger (5) and the domestic hot water storage tank (6) to form the circulation loop four and the circulation loop five, and the domestic hot water heat exchanger ( 5) It forms circulation loop 6 with the water source gas heat pump unit (1), and circulation loop 1, circulation loop 2, circulation loop 3, circulation loop 4, circulation loop 5 and circulation loop 6 are connected with domestic hot water supply controller (11) connected. 2. The soil source gas heat pump heating, cooling and hot water supply system according to claim 1, characterized in that the circulation loop one includes heat exchange with the water source gas heat pump unit (1) and buried pipes Two buried pipe heat exchanger maintenance cut-off valves (18) connected to the ground pipe heat exchanger (2), wherein the output end of the buried pipe heat exchanger (2) is connected to the buried pipe heat exchanger maintenance shut-off valve An underground pipeline circulating pump (7) is arranged between the shut-off valves (18). 3. The soil source gas heat pump heating, cooling and hot water supply system according to claim 1, characterized in that the second circulation loop includes the water source gas heat pump unit (1) and heat recovery heat exchanger (4) Two connected heat recovery heat exchanger maintenance shut-off valves (16), wherein the output end of the heat recovery heat exchanger (4) is connected to the heat recovery heat exchanger maintenance shut-off valve (16) ) is provided with a heat recovery circulation pump (8). 4. The soil source gas heat pump heating, cooling and hot water supply system according to claim 1, characterized in that the circulation loop three includes the water source gas heat pump unit (1) and the air conditioner terminal equipment (3 ), wherein an air-conditioning water circulation pump (10) is provided between the output end of the air-conditioning terminal equipment (3) and the air-conditioning water electric valve (14). 5. The soil source gas heat pump heating, cooling and hot water supply system according to claim 1, characterized in that, the circulation loop four includes the input end and the output end of the heat recovery heat exchanger (4) Two heat recovery heat exchanger electric valves (17) are connected, and the heat recovery heat exchanger electric valve (17) is connected with the domestic hot water heat exchanger through the domestic hot water heat exchanger electric valve one (15) (5) are connected with each other, wherein, between the electric valve one (15) of the domestic hot water heat exchanger (15) at the output end of the domestic hot water heat exchanger (5) and the electric valve (17) of the heat recovery heat exchanger Domestic hot water circulation pump (9). 6. The soil source gas heat pump heating, cooling and hot water supply system according to claim 1, characterized in that the circulation loop five includes a heat recovery heat exchanger (4), and the heat recovery heat exchanger (4) Connect with the domestic hot water storage tank (6) through two heat recovery heat exchanger electric valves (17), and the output end of the domestic hot water storage tank (6) is connected with the heat recovery exchange A domestic hot water circulating pump (9) is arranged between the heater electric valves (17). 7. The soil source gas heat pump heating, cooling and hot water supply system according to claim 1, characterized in that the circulation loop six includes a water source gas heat pump unit (1), and the water source gas heat pump unit (1 ) is connected to the domestic hot water heat exchanger (5) through the air-conditioning water electric valve (14) and the domestic hot water heat exchanger electric valve two (20) in turn, wherein the domestic heat An air-conditioning water circulation pump (10) is provided between the domestic hot water heat exchanger electric valve two (20) at the output end of the water heat exchanger (5) and the air-conditioning water electric valve (14). 8. The soil source gas heat pump heating, cooling and hot water supply system according to any one of claims 1 to 7, characterized in that the water source gas heat pump unit (1) is connected with a gas emergency shut-off valve (13), a gas meter (12) is provided between the water source gas heat pump unit (1) and the gas emergency shut-off valve (13). 9. The soil source gas heat pump heating, cooling and hot water supply system according to any one of claims 1 to 7, characterized in that the domestic hot water storage tank (6) is provided with a temperature sensor ( 19).