CN114739050A - Soil supplementary heat component, ground source heat system and control method based on ground source heat system - Google Patents

Abstract

The invention discloses a soil heat supplementing assembly based on a ground source heat system, the ground source heat system and a control method, relates to the field of air conditioning systems, and solves the technical problem that a ground source heat pump system in the prior art is prone to causing unbalanced cold and heat of soil after long-term operation. The soil heat supplementing assembly comprises a heating device, a heat exchange device and a power device, wherein the heating device, the heat exchange device, the power device and the heating device are sequentially connected to form a medium circulation loop; the heat exchange device is buried in the soil, and the heat exchange device provides heat for the soil by using the heated medium; the power device is used for providing power for the flow of the medium. The soil heat supplementing assembly can utilize outdoor heat to heat the medium, and then the heated medium exchanges heat with the soil, so that the heat of the soil is supplemented in summer to maintain the cold and heat balance of the soil, and a ground source heat system can operate stably and efficiently for a long time.

Description

Soil supplementary heat component, ground source heat system and control method based on ground source heat system

technical field

The invention relates to the technical field of air conditioning systems, and in particular, to a soil heating component based on a ground source heat system, a ground source heat system and a control method.

Background technique

Ground source heat pump is a renewable energy heating, ventilation and air conditioning technology. The soil temperature 2 meters below the surface is basically not affected by the season, and it can maintain a stable temperature (14-16 ° C) in some areas. Use energy. The ground source heat pump system utilizes the relatively stable characteristics of the underground normal temperature soil, through the pipeline system or groundwater buried around the building, and adopts the heat pump principle to realize the technology of completing heat exchange with the user end through a small amount of electric energy input. Ground source heat pump air conditioning is mainly divided into three parts: outdoor ground energy heat exchange system, water source heat pump unit system and indoor heating and air conditioning terminal system. The three systems rely on water or air heat exchange medium for heat transfer, water source heat pump and ground The heat exchange medium between the energies is water, and the heat exchange medium with the building heating and air conditioning terminal equipment can be water or air.

The traditional ground source heat pump system is equipped with a heat pump unit for cooling in summer and heating in winter. Specifically, the water source heat pump unit converts the energy of the soil into energy for the end, and then provides cooling or heating to the user through the indoor end system. In summer, the ground source heat pump system uses the cooling capacity extracted from the soil and converts it into the cooling capacity for the user through the compressor of the unit. In winter, it is the opposite. The ground source heat pump system takes heat from the soil and heats the user through the unit. The system is powered by a water pump to form a cycle.

However, the applicant found that the traditional ground source heat pump system has at least the following defects: (1) the traditional ground source heat pump system is equipped with a heat pump unit, and the heat pump unit accounts for a large proportion of the energy consumption in the ground source heat pump system, which makes the traditional ground source heat pump system. The energy consumption of the heat pump system still cannot be reduced to a minimum; (2) the traditional ground source heat pump system focuses on providing heat and cooling to the user side. As long as there is insufficient heat supply, heat is obtained from the soil. After the ground source heat pump system operates for a long time, it is extremely It is easy to cause the imbalance of soil cooling and heating, which affects the long-term stable operation of the ground source heat pump system. Therefore, there is an urgent need to provide a soil heating component based on a ground source heating system, so that the soil can be supplemented with heat, so that the heat of the soil can be balanced.

SUMMARY OF THE INVENTION

One of the objectives of the present invention is to propose a soil heating component based on a ground source heat system, which solves the technical problem that the ground source heat pump system in the prior art can easily cause unbalanced soil cooling and heating after long-term operation. The technical effects that can be produced by the preferred technical solutions of the present invention are described in detail below.

For achieving the above object, the invention provides the following technical solutions:

The soil heating component based on the ground source heat system of the present invention includes a heating device, a heat exchange device and a power device, and the heating device, the heat exchange device, the power device and the heating device are connected in sequence to form a medium a circulation loop, wherein the heating device uses outdoor heat to heat the medium flowing into the heating device; the heat exchange device is embedded in the soil, and the heat exchange device uses the heated medium to provide heat for the soil; the The power unit is used to power the flow of the medium.

According to a preferred embodiment, the soil heating component based on the ground source heat system further comprises a metering device, the metering device is disposed at the inlet of the heat exchange device and the outlet of the heat exchange device, and the The metering device is used to meter the heat input into the soil and the heat extracted from the soil.

According to a preferred embodiment, the metering device comprises a first temperature sensor, a second temperature sensor and a flow meter, wherein the first temperature sensor is arranged at the inlet of the heat exchange device, the second temperature sensor and The flow meter is arranged at the outlet of the heat exchange device.

According to a preferred embodiment, the heat input to the soil is: Q ₁ =C*G*(T ₁ -T ₂ ), and the heat extracted from the soil is: Q ₂ =C*G*(T ₂ -T ₁ ), where , Q1 is the heat input to the soil, _Q2 is the heat _extracted from the soil, C is the specific heat capacity of the medium, G is the medium flow measured by the flow meter, and T1 is the medium temperature measured by the _first temperature sensor , T ₂ is the medium temperature measured by the second temperature sensor.

According to a preferred embodiment, the soil heating component based on the ground source heat system further comprises a controller, the controller is connected with the power device and the metering device, and the controller is used for storing the extraction from the soil The controller also controls the heat input to the soil by controlling the working state of the power plant, and makes the heat input to the soil equal to the heat extracted from the soil.

According to a preferred embodiment, the soil heating component based on the ground source heating system includes a plurality of heating units, and the plurality of heating units are arranged in parallel, and the heating unit includes the heating device, the The heat exchange device, the power device and the heating device are connected in sequence to form a medium circulation loop, and the heat supplement unit further includes the metering device and the controller.

The soil heating component based on the ground source heat system of the present invention has at least the following beneficial technical effects:

The present invention is based on the soil heating component of the ground source heat system, including a heating device, a heat exchange device and a power device. The heat heats the medium flowing into the heating device; the heat exchange device is buried in the soil, the heat exchange device uses the heated medium to provide heat to the soil, and the power device is used to provide power for the flow of the medium. It can be seen that the ground source of the present invention is based on The soil heating component of the thermal system can use the outdoor heat to heat the medium, and then exchange the heat between the heated medium and the soil, so that the heat of the soil can be supplemented in summer to maintain the balance of cold and heat of the soil, so as to make the ground source Long-term, stable and efficient operation of thermal system. That is, the soil heating component based on the ground source heat system of the present invention solves the technical problem that the ground source heat pump system in the prior art is likely to cause unbalanced heat and cold in the soil after long-term operation.

In addition, the preferred technical solution of the present invention also has the following beneficial technical effects:

The preferred technical solution of the present invention is that the soil heating component based on the ground source heat system further includes a metering device. The metering device is arranged at the inlet of the heat exchange device and the outlet of the heat exchange device, and the metering device is used to measure the heat input to the soil and the heat from the soil. The extracted heat, through the function of the metering device, can accurately measure the heat extracted from the soil in winter, and then according to the heat extracted in winter, the corresponding heat can be added to the soil in summer, so that the heat extracted in winter and the heat supplemented in summer can be balanced. , in order to maintain the balance of heat and cold in the soil.

The second object of the present invention is to propose a ground source heat system.

The ground source heat system of the present invention includes a heat supplement component, a terminal device and a control valve component, wherein the heat supplement component is the soil heat supplement component based on the ground source heat system according to any one of the technical solutions of the present invention, The terminal device is arranged between the outlet of the power device and the inlet of the heat exchange device, and the terminal device is used for exchanging heat with the user; the control valve assembly is arranged at both ends of the heating device and at the end of the terminal device. two ends, and the control valve assembly is used to control the flow direction of the medium, and make the ground source heating system in the supplementary heating mode or the heating mode.

According to a preferred embodiment, when the ground source heat system is in the supplementary heat mode, the heating device and the power device are in an open state, the terminal equipment is in a closed state, and the control valve assembly is used to control all The heating device, the heat exchange device, the power device and the heating device are connected in sequence to form a heating circuit; when the ground source heat system is in the heating mode, the terminal equipment and the power device are turned on state, the heating device is in a closed state, and the control valve assembly is used to control the heat exchange device, the power device, the terminal equipment and the heat exchange device to be connected in sequence to form a heating circuit.

According to a preferred embodiment, the control valve assembly includes a first control valve, a second control valve, a third control valve and a fourth control valve, wherein the first control valve is provided at the inlet of the heating device, The second control valve is arranged between the inlet of the first control valve and the outlet of the heating device; the third control valve is arranged between the outlet of the power device and the outlet of the terminal equipment, The fourth control valve is arranged between the outlet of the power plant and the inlet of the terminal equipment, and based on the operating mode of the ground source heat system, the first control valve, the second control valve, The third control valve and the fourth control valve are in an open state or a closed state.

According to a preferred embodiment, when the first control valve is in an open state, the second control valve is in a closed state, the third control valve is in an open state, and the fourth control valve is in a closed state, the heating The device, the heat exchange device, the power device and the heating device are connected in sequence to form a heating circuit, so that the ground source heat system is in a heating mode; the first control valve is in a closed state, the When the second control valve is in an open state, the third control valve is in a closed state, and the fourth control valve is in an open state, the heat exchange device, the power device, the terminal equipment and the heat exchange device The heating circuits are sequentially connected and formed so that the ground source heating system is in heating mode.

The ground source heat system provided by the present invention has at least the following beneficial technical effects:

The ground source heating system of the present invention has a supplementary heat mode or a heating mode. In winter, the underground heat can be directly extracted to heat the user end, and in summer, the soil supplementary heat component of any one of the technical solutions of the present invention can be used as soil Supplement heat, so as to maintain the balance of cold and heat in the soil, so that the ground source heating system can operate stably and efficiently for a long time; When in the supplementary heat mode, the outdoor heat is used to supplement the soil heat, that is, the ground source heat system of the present invention cancels the heat pump unit. Compared with the traditional ground source heat pump system, the ground source heat system of the present invention is more energy-saving.

The third object of the present invention is to provide a control method of a ground source heat system.

The control method for a ground source heat system according to any one of the technical solutions of the present invention includes the following steps: judging the current season; controlling the first control valve, the second control valve and the third control valve based on the current season and the opening state of the fourth control valve, and also control the opening state of the heating device, the power device and the terminal equipment based on the current season, and make the ground source heating system operate in the supplementary heat mode or the heating mode.

According to a preferred embodiment, when the current season is summer, control the first control valve to be in an open state, the second control valve to be in a closed state, the third control valve to be in an open state, and the fourth control valve to be in an open state. The valve is in the closed state, the control heating device and the power device are in the open state, the terminal equipment is in the closed state, and the heating device, the heat exchange device, the power device and the heating device are connected in sequence to form a heat supplementary loop; when the current season is winter, Control the first control valve to be in a closed state, the second control valve to be in an open state, the third control valve to be in a closed state, the fourth control valve to be in an open state, and to control terminal equipment and power devices to be in an open state , The heating device is in a closed state, and the heat exchange device, the power device, the terminal equipment and the heat exchange device are connected in sequence to form a heating circuit.

The control method of the ground source heat system provided by the present invention has at least the following beneficial technical effects:

The control method of the ground source heat system of the present invention controls the opening states of the first control valve, the second control valve, the third control valve and the fourth control valve based on the current season, and also controls the heating device, power The open state of the device and terminal equipment, and make the ground source heating system form a heating circuit or a heating circuit, so that the ground source heating system can realize the functions of heating in winter and heating in summer, so as to maintain the balance of cold and heat in the soil, making the ground source heating system. The thermal system can run for a long time, stably and efficiently.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a preferred embodiment of the ground source heating system of the present invention;

Fig. 2 is a flow chart of the control method of the ground source heat system of the present invention.

In the figure: 11, heating device; 12, heat exchange device; 13, power device; 14, first temperature sensor; 15, second temperature sensor; 16, flow meter; 17, terminal equipment; 181, first control valve; 182, the second control valve; 183, the third control valve; 184, the fourth control valve.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The soil heating component, the ground source heat system and the control method based on the ground source heat system of the present invention will be described in detail below with reference to Figures 1 and 2 and Embodiments 1 to 3 of the description.

Example 1

In this embodiment, the soil heating component based on the ground source heat system of the present invention is described in detail.

The soil heating component based on the ground source heat system in this embodiment includes a heating device 11 , a heat exchange device 12 and a power device 13 . The heating device 11 , the heat exchange device 12 , the power device 13 and the heating device 11 are connected in sequence to form medium circulation. circuit, as shown in Figure 1. Preferably, the heating device 11 uses outdoor heat to heat the medium flowing into the heating device 11; the heat exchange device 12 is embedded in the soil, and the heat exchange device 12 uses the heated medium to provide heat for the soil; the power device 13 is used to provide heat for the medium. Flow provides power. More preferably, the heating device 11 is a water storage tower, the heat exchange device 12 is a buried pipe, the power device 13 is a water pump, and the medium is water. More preferably, since the outdoor temperature is higher in summer, the heating device 11 can use the outdoor heat in summer to heat the medium flowing into the heating device 11, thereby improving heating efficiency and saving energy.

Specifically, the soil heating component in this embodiment provides soil heating in the following manner: the heating device 11 , the heat exchange device 12 , the power device 13 and the heating device 11 in this embodiment are connected in sequence to form a medium circulation loop, and the medium flows When the heating device 11 is overheated, the medium can be heated by the outdoor heat in summer, so that the temperature of the medium increases; the heated medium flows to the heat exchange device 12, so that the heated medium can exchange heat with the soil and provide heat for the soil; After the heat exchange, the temperature of the medium decreases and flows to the heating device 11 again for heating. The power device 13 provides power for the flow of the medium in the entire circuit. In this way, the outdoor heat can be continuously used to supplement the soil heat. It can be seen that the soil heating component based on the ground source heat system in this embodiment can use the outdoor heat to heat the medium, and then exchange heat with the soil after the heated medium, so that the heat of the soil can be supplemented in summer, so as to maintain the temperature of the soil. Cold and heat balance, so that the ground source heating system can run long-term, stable and efficient. That is, the soil heating component based on the ground source heat system in this embodiment solves the technical problem that the ground source heat pump system in the prior art is likely to cause unbalanced heat and cold in the soil after long-term operation.

According to a preferred embodiment, the soil heating component based on the ground source heat system further includes a metering device, the metering device is arranged at the inlet of the heat exchange device 12 and the outlet of the heat exchange device 12, and the metering device is used for metering the heat input to the soil and heat extracted from the soil. The preferred technical solution of this embodiment is based on the soil heating component of the ground source heating system. Through the function of the metering device, the heat extracted from the soil in winter can be accurately measured, and then the corresponding heat can be supplemented for the soil in summer according to the heat extracted in winter. , so as to balance the heat extracted in winter and the heat supplemented in summer, so as to maintain the balance of cold and heat in the soil.

According to a preferred embodiment, the metering device includes a first temperature sensor 14, a second temperature sensor 15 and a flow meter 16, wherein the first temperature sensor 14 is provided at the inlet of the heat exchange device 12, and the second temperature sensor 15 and the flow meter 16 is arranged at the outlet of the heat exchange device 12, as shown in FIG. 1 . Preferably, the heat input to the soil is: Q ₁ =C*G*(T ₁ -T ₂ ), and the heat extracted from the soil is: Q ₂ =C*G*(T ₂ -T ₁ ), wherein Q ₁ is the heat input to the soil, _Q2 is the heat extracted from the soil, C is the specific heat capacity of the medium, G is the medium flow measured by the flow meter 16, T1 is the medium temperature measured by the _first temperature sensor ₁₄ , and T2 is the first temperature. The temperature of the medium measured by the temperature sensor 15. The metering device of the preferred technical solution of this embodiment is used to measure the temperature difference and flow rate of the medium entering and leaving the heat exchange device 12 to obtain the heat input to the soil or the heat extracted from the soil. The metering device of the preferred technical solution of this embodiment has the advantages of convenient installation and high reliability.

According to a preferred embodiment, the soil heating component based on the ground source heat system further includes a controller, the controller is connected with the power device 13 and the metering device, and the controller is used to store the heat extracted from the soil, and the controller also controls the power device by controlling the power device 13. 13 to control the heat input into the soil and make the heat input into the soil comparable to the heat extracted from the soil. Preferably, when the heat input to the soil is less than the heat extracted from the soil, the controller controls the power device 13 to be in an on state, so that the soil heating component continues to supplement heat for the soil; when the heat input to the soil is equivalent to the heat extracted from the soil When , the controller controls the power device 13 to be in an off state, so that the soil heat supplement component stops supplementing heat for the soil. In the preferred technical solution of this embodiment, the heat input to the soil is equivalent to the heat extracted from the soil, which may mean that the heat input to the soil is equal to the heat extracted from the soil, or it may refer to the heat input to the soil and the heat extracted from the soil. The difference is within a preset range, for example, the difference between the heat input to the soil and the heat extracted from the soil does not exceed 1% of the heat extracted from the soil. The controller is, for example, a microcontroller. The preferred technical solution of this embodiment controls the heat input to the soil through the controller, which can improve the intelligence of the soil heating component.

According to a preferred embodiment, the soil heating component based on the ground source heat system includes a plurality of heating units, the plurality of heating units are arranged in parallel, and the heating unit includes a heating device 11 , a heat exchange device 12 , a power device 13 and a heating device. The devices 11 are sequentially connected to form a medium circulation loop, and the heat supplementing unit further includes a metering device and a controller. Only one supplementary heat unit is shown in FIG. 1 . Specifically, the number of heat supplementing units may be determined based on the range of the soil to be supplemented. The preferred technical solution of this embodiment is that the soil heating component based on the ground source heat system includes a plurality of heating units, and the heating efficiency can be improved by simultaneously supplying heat to the soil through the multiple heating units.

Example 2

In this embodiment, the ground source heating system of the present invention is described in detail.

The ground source heat system of this embodiment includes a heat supplement component, a terminal device 17 and a control valve component, as shown in FIG. 1 . Preferably, the heat supplementation component is the soil heat supplementation component based on the ground source heat system of any one of the technical solutions in Embodiment 1, and the terminal equipment 17 is arranged between the outlet of the power device 13 and the inlet of the heat exchange device 12, and the terminal equipment 17 is used to exchange heat with the user; the control valve assembly is arranged at both ends of the heating device 11 and both ends of the terminal equipment 17, and the control valve assembly is used to control the flow direction of the medium and make the ground source heating system in the supplementary heat mode or heating mode, as shown in Figure 1. The structure of the terminal device 17 may be the same as that in the prior art, and details are not repeated here. More preferably, the terminal device 17 is arranged between the outlet of the power device 13 and the inlet of the heating device 11 , as shown in FIG. 1 . Not limited to this, the terminal device 17 may also be disposed between the outlet of the heating device 11 and the inlet of the heat exchange device 12 . More preferably, when the temperature is high in summer, the ground source heating system is in the supplementary heating mode; in winter, the ground source heating system is in the heating mode, so that the user can be heated by using the ground source heat.

The ground source heating system of this embodiment has a heating mode or a heating mode. In winter, the underground heat can be directly extracted to heat the user, and in summer, the soil heating component of any one of the technical solutions in Embodiment 1 can be used. Supplement heat to the soil, so as to maintain the balance of cold and heat of the soil, so that the ground source heating system can operate in a long-term, stable and efficient manner; on the other hand, when the ground source heating system of this embodiment is in the heating mode, the underground heat is directly extracted for the user. End heating, in the supplementary heat mode, the outdoor heat is used to supplement heat for the soil, that is, the ground source heat system in this embodiment cancels the heat pump unit. Compared with the traditional ground source heat pump system, the ground source heat system in this embodiment is more efficient. Energy saving.

According to a preferred embodiment, when the ground source heating system is in the supplementary heat mode, the heating device 11 and the power device 13 are in an open state, the terminal equipment 17 is in a closed state, and the control valve assembly is used to control the heating device 11, the heat exchange device 12, The power unit 13 and the heating unit 11 are connected in sequence to form a heating circuit; when the ground source heating system is in the heating mode, the terminal equipment 17 and the power unit 13 are in an open state, the heating device 11 is in a closed state, and the control valve assembly is used to control the exchange. The heat device 12 , the power device 13 , the terminal equipment 17 and the heat exchange device 12 are connected in sequence to form a heating circuit, as shown in FIG. 1 .

Specifically, when the ground source heating system is in the supplementary heat mode, the terminal equipment 17 does not work, the heating device 11 and the power device 13 work, and when the medium flows through the heating device 11, the outdoor heat can be used to heat the medium, so that the temperature of the medium increases ; The heated medium flows to the heat exchange device 12, so that the heated medium can exchange heat with the soil to provide heat for the soil; the temperature of the medium after heat exchange with the soil decreases, and flows to the heating device 11 for heating again. The outdoor heat can be continuously used to supplement the soil heat, as shown in Figure 1. When the ground source heating system is in the heating mode, the heating device 11 does not work, the terminal equipment 17 and the power device 13 work, and when the medium flows through the heat exchange device 12, it can exchange heat with the soil, so that the temperature of the medium increases; The medium then flows to the terminal equipment 17 for heat exchange for the user end, thereby providing heat for the user end; the temperature of the medium after heat exchange with the user end decreases, and flows to the heat exchange device 12 again to exchange heat with the soil, in this way, that is, It can continuously provide heat to the user, as shown in Figure 1.

According to a preferred embodiment, the control valve assembly includes a first control valve 181 , a second control valve 182 , a third control valve 183 and a fourth control valve 184 , wherein the first control valve 181 is provided at the inlet of the heating device 11 , The second control valve 182 is arranged between the inlet of the first control valve 181 and the outlet of the heating device 11; the third control valve 183 is arranged between the outlet of the power device 13 and the outlet of the terminal equipment 17, and the fourth control valve 184 is arranged Between the outlet of the power plant 13 and the inlet of the terminal equipment 17, and based on the operating mode of the ground source heat system, the first control valve 181, the second control valve 182, the third control valve 183 and the fourth control valve 184 Either on or off, as shown in Figure 1. The preferred technical solution of this embodiment is to control the state of the first control valve 181 , the second control valve 182 , the third control valve 183 and the fourth control valve 184 to make the ground source heating system be in the supplementary heating mode or the heating mode, so that The ground source heating system can operate in different modes in different seasons to achieve two functions of supplementary heat and heating.

According to a preferred embodiment, when the first control valve 181 is in an open state, the second control valve 182 is in a closed state, the third control valve 183 is in an open state, and the fourth control valve 184 is in a closed state, the heating device 11 and the heat exchange device 12. The power device 13 and the heating device 11 are connected in sequence to form a heating circuit, so that the ground source heating system is in the heating mode. Preferably, when the first control valve 181 is in a closed state, the second control valve 182 is in an open state, the third control valve 183 is in a closed state, and the fourth control valve 184 is in an open state, the heat exchange device 12 , the power device 13 , the terminal The equipment 17 and the heat exchange device 12 are connected in sequence and form a heating circuit, so that the ground source heating system is in a heating mode. The preferred technical solution of this embodiment is to control the opening states of the first control valve 181 , the second control valve 182 , the third control valve 183 and the fourth control valve 184 to make the ground source heating system operate in the supplementary heat mode or the heating mode, which has a structure. The advantages of simplicity, ease of installation and high reliability.

Example 3

In this embodiment, the control method of the ground source heat system of the present invention is described in detail.

The method for controlling a ground source heat system according to any one of the technical solutions in Embodiment 2 in this embodiment includes the following steps: judging the current season; controlling the first control valve 181 , the second control valve 182 , the second control valve 182 , The opening states of the third control valve 183 and the fourth control valve 184 also control the opening states of the heating device 11 , the power device 13 and the terminal equipment 17 based on the current season, and make the ground source heating system operate in the supplementary heating mode or the heating mode . Preferably, the current season can be determined by parameters such as temperature and time.

Preferably, when the current season is summer, control the first control valve 181 to be in an open state, the second control valve 182 to be in a closed state, the third control valve 183 to be in an open state, and the fourth control valve 184 to be in a closed state, and control the heating The device 11 and the power device 13 are in the open state, the terminal equipment 17 is in the closed state, and the heating device 11, the heat exchange device 12, the power device 13 and the heating device 11 are connected in sequence to form a heat supplementary loop, as shown in Figures 1 and 2 .

Preferably, when the current season is winter, control the first control valve 181 to be in a closed state, the second control valve 182 to be in an open state, the third control valve 183 to be in a closed state, and the fourth control valve 184 to be in an open state, and control the terminal The equipment 17 and the power device 13 are in the on state, the heating device 11 is in the off state, and the heat exchange device 12, the power device 13, the terminal equipment 17 and the heat exchange device 12 are connected in sequence to form a heating circuit, as shown in Figures 1 and 2 .

The control method of the ground source heat system in this embodiment controls the opening states of the first control valve 181 , the second control valve 182 , the third control valve 183 and the fourth control valve 184 based on the current season, and also based on the current season Control the open state of the heating device 11, the power device 13 and the terminal equipment 17, and make the ground source heating system form a heating circuit or a heating circuit, so that the ground source heating system can realize the function of heating in winter and heating in summer, so as to maintain the soil The balance of cold and heat makes the ground source heating system run in a long-term, stable and efficient manner.

In the description of the present invention, it should be noted that, unless otherwise specified, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inside" ", "outside", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Removal connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (12)

1. A soil heat supplementing assembly based on a ground source heat system is characterized by comprising a heating device (11), a heat exchange device (12) and a power device (13), wherein the heating device (11), the heat exchange device (12), the power device (13) and the heating device (11) are sequentially connected to form a medium circulation loop, and the heating device (11) heats a medium flowing into the heating device (11) by utilizing outdoor heat; the heat exchange device (12) is buried in soil, and the heat exchange device (12) provides heat for the soil by using the heated medium; the power device (13) is used for providing power for the flow of the medium.

2. A ground source heat system based soil concurrent heating assembly as claimed in claim 1, further comprising a metering device disposed at an inlet of said heat exchanging device (12) and an outlet of said heat exchanging device (12) and for metering heat input to and extracted from the soil.

3. Ground source heat system based soil concurrent heating assembly according to claim 2, wherein the metering device comprises a first temperature sensor (14), a second temperature sensor (15) and a flow meter (16), wherein the first temperature sensor (14) is arranged at the inlet of the heat exchanging device (12) and the second temperature sensor (15) and the flow meter (16) are arranged at the outlet of the heat exchanging device (12).

4. A ground source heat system based soil concurrent heating assembly as claimed in claim 3, wherein the heat input into the soil is: q₁＝C*G*(T₁-T₂) The heat extracted from the soil is: q₂＝C*G*(T₂-T₁) Wherein Q is₁For input of heat into the soil, Q₂C is the specific heat capacity of the medium, G is the medium flow measured by the flowmeter (16), T₁The temperature T of the medium measured by the first temperature sensor (14)₂Is the medium temperature measured by the second temperature sensor (15).

5. A ground source heat system based soil concurrent heating assembly as claimed in claim 2, further comprising a controller connected to said power unit (13) and said metering device and adapted to store heat extracted from the soil, said controller further controlling the amount of heat input to the soil by controlling the operating state of said power unit (13) to correspond to the amount of heat extracted from the soil.

6. The ground source heat system-based soil heat supplementing assembly according to claim 5, comprising a plurality of heat supplementing units, wherein the plurality of heat supplementing units are arranged in parallel, the heat supplementing units comprise medium circulation loops formed by sequentially connecting the heating device (11), the heat exchanging device (12), the power device (13) and the heating device (11), and the heat supplementing units further comprise the metering device and the controller.

7. A ground source heat system, characterized by comprising an auxiliary heat assembly, a terminal equipment (17) and a control valve assembly, wherein the auxiliary heat assembly is the ground source heat system-based soil auxiliary heat assembly of any one of claims 1 to 6, the terminal equipment (17) is arranged between the outlet of the power device (13) and the inlet of the heat exchange device (12), and the terminal equipment (17) is used for exchanging heat with a user terminal; the control valve assemblies are arranged at two ends of the heating device (11) and two ends of the terminal equipment (17), and are used for controlling the circulation direction of the medium and enabling the ground source heat system to be in a heat supplementing mode or a heating mode.

8. A ground source heat system according to claim 7, characterized in that when the ground source heat system is in a heat supplementing mode, the heating device (11) and the power device (13) are in an open state, the end equipment (17) is in a closed state, and the control valve assembly is used for controlling the heating device (11), the heat exchanging device (12), the power device (13) and the heating device (11) to be connected in sequence and form a heat supplementing loop;

when the ground source heat system is in a heating mode, the end equipment (17) and the power device (13) are in an open state, the heating device (11) is in a closed state, and the control valve assembly is used for controlling the heat exchange device (12), the power device (13), the end equipment (17) and the heat exchange device (12) to be sequentially connected to form a heating loop.

9. A ground source heat system according to claim 7 or 8, characterized in that said control valve assembly comprises a first control valve (181), a second control valve (182), a third control valve (183) and a fourth control valve (184), wherein said first control valve (181) is arranged at the inlet of said heating device (11) and said second control valve (182) is arranged between the inlet of said first control valve (181) and the outlet of said heating device (11); the third control valve (183) is arranged between the outlet of the power plant (13) and the outlet of the end equipment (17), the fourth control valve (184) is arranged between the outlet of the power plant (13) and the inlet of the end equipment (17), and the first control valve (181), the second control valve (182), the third control valve (183) and the fourth control valve (184) are in an open state or a closed state based on the operation mode of the ground source heat system.

10. A ground source heat system according to claim 9, characterized in that when the first control valve (181) is in an open state, the second control valve (182) is in a closed state, the third control valve (183) is in an open state, and the fourth control valve (184) is in a closed state, the heating device (11), the heat exchanging device (12), the power device (13), and the heating device (11) are connected in sequence and form a heat supplementing loop, so that the ground source heat system is in a heat supplementing mode;

when the first control valve (181) is in a closed state, the second control valve (182) is in an open state, the third control valve (183) is in a closed state, and the fourth control valve (184) is in an open state, the heat exchange device (12), the power device (13), the end equipment (17), and the heat exchange device (12) are sequentially connected to form a heating loop, so that the ground source heat system is in a heating mode.

11. A method for controlling a ground source heat system according to any one of claims 7 to 10, comprising the steps of:

judging the current season;

and controlling the opening states of the first control valve (181), the second control valve (182), the third control valve (183) and the fourth control valve (184) based on the current season, and controlling the opening states of the heating device (11), the power device (13) and the end equipment (17) based on the current season, and enabling the ground source heat system to operate in a heat supplementing mode or a heating mode.

12. The control method according to claim 11, characterized in that when the current season is summer, the first control valve (181) is controlled to be in an open state, the second control valve (182) is controlled to be in a closed state, the third control valve (183) is controlled to be in an open state, the fourth control valve (184) is controlled to be in a closed state, the heating device (11) and the power device (13) are controlled to be in an open state, the end equipment (17) is controlled to be in a closed state, and the heating device (11), the heat exchange device (12), the power device (13) and the heating device (11) are connected in sequence to form a heat supplementing loop;

when the current season is winter, the first control valve (181) is controlled to be in a closed state, the second control valve (182) is controlled to be in an open state, the third control valve (183) is controlled to be in a closed state, the fourth control valve (184) is controlled to be in an open state, the terminal equipment (17) and the power device (13) are controlled to be in an open state, the heating device (11) is controlled to be in a closed state, and the heat exchange device (12), the power device (13), the terminal equipment (17) and the heat exchange device (12) are sequentially connected to form a heating loop.

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