A geothermal unit for a medium-deep geothermal system and a method thereof

Abstract

The present invention relates to the field of geothermal unit technology, and in particular to a geothermal unit for a medium-deep geothermal system and a method thereof. Technical solution: A geothermal unit for a medium-deep geothermal system and a method thereof include an evaporator, a condenser, a compressor, an electric control box, a balance carrier, an underground conductive rod, a first energy storage transmission tank, a second energy storage transmission tank and a node protection component; the node protection component is used to be arranged at both ends of the evaporator and the condenser, which can be used to form a sealing protection for the pipeline interface to avoid leakage, and form a two-way protection with the pressure shock output and input, and the first energy storage transmission tank and the second energy storage transmission tank are used to be arranged outside the evaporator and the condenser, which can be used to output cold and hot energy and absorb environmental cold and hot energy for circulation, so as to reduce energy consumption and maintain the overall transportation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal units, and in particular to a geothermal unit for a medium-deep geothermal system and a method thereof. Background Art

[0002] The medium-deep geothermal buried pipe heating system uses a drilling rig to drill holes into high-temperature rock layers about 1500-3000 meters underground, and installs closed corrosion-resistant metal heat exchangers in the holes. These heat exchangers are based on high-efficiency thermal insulation inner pipes under the holes to form an under-hole heat exchange medium circulation system. The heat pump units and other equipment in the energy station extract the heat from the circulating medium in the heat exchange holes and transmit it to energy-consuming buildings, thereby achieving the purpose of heating or cooling the energy-consuming buildings.

[0003] The geothermal unit of the medium-deep geothermal system is a key component of the medium-deep geothermal buried pipe heating system. It is mainly responsible for extracting heat energy from high-temperature rock layers deep underground and converting it into heat energy that can be used by people. The existing geothermal units, during the exchange process, transmit hot water by converting cold and hot according to usage needs, which produces extreme temperatures and easily leads to pipeline sealing leakage. Moreover, due to the deep burial of the local area, it is not easy to detect in time, which increases its energy consumption and reduces the overall temperature control effect.

[0004] Therefore, for the above-mentioned existing geothermal units, during the exchange process, due to the transmission of hot water through cold and hot conversion according to usage needs, it generates extreme temperatures, which can easily lead to pipeline sealing leakage, and due to the local deep burial, it is not easy to detect in time, which increases its energy consumption and reduces the overall temperature control effect. A geothermal unit and method for a medium-deep geothermal system can be designed, and node components on the pipeline can be set to carry out timely maintenance and early warning of the pipeline, and energy storage equipment can be set simultaneously to improve the overall temperature control effect. Summary of the invention

[0005] In order to overcome the problem that the existing geothermal units, during the exchange process, due to the cold and hot conversion transmission airflow according to the use needs, it produces extreme temperature, which is easy to cause pipeline sealing leakage, and due to the local deep burial, it is not easy to detect in time, which increases its energy consumption and reduces the overall temperature control effect.

[0006] The technical solution of the present invention is: a geothermal unit for a medium-deep geothermal system, including an evaporator, a condenser, a compressor, an electrical control box, a balancing carrier, an underground conduction rod, a first energy storage transmission tank, a second energy storage transmission tank and a node protection component; the evaporator for heat exchange and the condenser for heating conduction control are arranged in parallel with each other, and a compressor for compressing and conveying refrigerant so that it circulates under different conditions is provided above the evaporator and the condenser, and an electrical control box for controlling the overall operation is provided on the top of the compressor, and node protection components for sealing and protecting the pipeline interface to prevent leakage are provided at both ends of the evaporator and the condenser, and a balancing carrier for supporting the whole is provided at the lower end of the node protection component, and underground conduction rods for conducting medium deep underground are provided at the lower ends of the evaporator and the condenser, and the first energy storage transmission tank and the second energy storage transmission tank are provided on the periphery of the evaporator and the condenser for outputting cold and hot energy and absorbing environmental cold and hot energy for circulation.

[0007] Preferably, a node protection component is utilized and disposed at both ends of the evaporator and the condenser, which can be used to form a sealing protection for the pipeline interface to prevent leakage, and form a two-way protection with the output and input of pressure shocks. A first energy storage transmission tank and a second energy storage transmission tank are utilized and disposed outside the evaporator and the condenser, which can be used to output cold and hot energy and absorb environmental cold and hot energy for circulation, thereby reducing energy consumption and maintaining the overall transportation effect.

[0008] Preferably, two sets of sealing rings are linearly sleeved on the evaporator and condenser, and the side walls of the sealing rings are provided with air pressure sensors, built-in signal devices and temperature sensors deep inside. An indicator light is provided on the top of the built-in signal device. Two sets of medium pipes for discharge and connection circulation are provided inside the evaporator and condenser, and node rings are provided between the medium pipes and the evaporator and condenser, through which sealing protection can be provided.

[0009] Preferably, the two groups of medium pipes are respectively provided with a first conduction pipe and a second conduction pipe in the extension direction, and the first conduction pipe and the second conduction pipe are respectively provided with a first valve sleeve and a second valve sleeve at one end away from the node ring, and thermal expansion valves are provided inside the first valve sleeve and the second valve sleeve. The first conduction pipe and the second conduction pipe are provided with a pressure rubber balloon at one end away from the first valve sleeve and the second valve sleeve, and a rubber damping spring is provided inside the pressure rubber balloon. The pressure rubber balloon can be used to provide collision protection against excessive pressure.

[0010] Preferably, a protective box is provided on the outer side of the compressor, a balancing plate is symmetrically provided on the bottom of the compressor, guide pipes that penetrate into the evaporator and condenser are provided on both sides of the compressor, a protective plate is provided between the guide pipe and the compressor, and a pressure valve is provided inside the protective plate, through which output control can be performed.

[0011] Preferably, the interior of the electric control box is provided with an electrical signal receiver, a digital signal converter and a processor in sequence, the outside of the electric control box is provided with a maintenance door, the maintenance door is provided with a display screen electrically connected to the digital signal converter, the top of the signal receiver is provided with an antenna, the top of the antenna is provided with a warning light, and an early warning display can be provided through the warning light.

[0012] Preferably, a temperature-insulating box is provided in the middle of the underground conductive rod, a pulse signal transmitter is provided inside the temperature-insulating box, and a metering valve is provided inside the pulse signal transmitter, through which the flowing medium can be monitored.

[0013] Preferably, the bottom of the first energy storage transmission tank and the second energy storage transmission tank are both provided with a mounting plate, the bottom of the mounting plate is circumferentially provided with mounting bolts near the edge, the interior of the first energy storage transmission tank and the second energy storage transmission tank is provided with a conducting medium, the top of the first energy storage transmission tank and the second energy storage transmission tank is provided with a delivery pipe, the top of the delivery pipe is provided with a reversing valve, the interior of the reversing valve is provided with an electromagnetic control valve, and both sides of the electromagnetic control valve are provided with guide pipes, and the delivery can be controlled by the electromagnetic control valve.

[0014] Preferably, the node protection assembly includes a casing, a perforation, a positioning hole, a tension plate, a temperature sensing strip, a protection ring, a shock-absorbing ball, an adapter ring, a temperature sensing rod, a spring column, a positioning bolt, an insulating ring, an insulating casing and a grounding rod. A perforation is provided in the center of the casing, and positioning holes are provided on both sides of the casing. A tension plate is provided in the center of the casing, and a temperature sensing strip is provided in the center of the tension plate. A built-in wireless signal transmitter is provided inside the temperature sensing strip, and signal transmission can be performed through the wireless signal transmitter.

[0015] Preferably, a protective ring is provided at the top center and the bottom center of the tension plate, a plurality of groups of temperature sensing rods are provided along the inner side of the protective ring, a temperature sensor electrically connected to the wireless signal transmitter is provided inside the temperature sensing rod, protective rings are symmetrically provided on the tension plate, a plurality of groups of shock-absorbing balls are provided on the periphery of the protective ring, spring columns passing through positioning holes are provided at both ends of the tension plate, a damper is provided inside the spring column, a positioning bolt is sleeved on the spring column, an insulating ring is provided on one side of the positioning bolt, a grounding rod is provided at the lower end of the insulating ring, and an insulating sleeve is sleeved on the end of the spring column, and the grounding rod can reduce the static electricity effect caused by external dryness and increase the service life of internal electronic components.

[0016] According to another aspect of the present invention, a geothermal unit for a medium-deep geothermal system and a method thereof are provided, comprising the following steps:

[0017] S1. Pre-select a suitable installation location, dig a deep channel, make the lower conductive rod go deep into the corresponding position, set the evaporator and condenser in parallel and connect them with the lower conductive rod, and then install the node protection components on both ends of the evaporator and condenser respectively, adjust the positioning bolts so that the adapter ring can protect the outer periphery of the corresponding pipeline, and adjust the direction of the insulating ring so that the grounding rod is grounded;

[0018] S2. Connect the guide tube on the first energy storage transmission tank to the input end of the indoor energy supply and heat supply transmission equipment, respectively, and connect the guide tube on the second energy storage transmission tank to the output end of the indoor energy supply and heat supply transmission equipment, respectively, and adjust the parameters through the display screen to start the overall operation;

[0019] S3. When cooling is performed, the lower conduction rod absorbs cold from the underground through the underground buried pipe system. At the same time, the metering valve can monitor the internal flow state, which is fed back to the signal receiver by the pulse signal transmitter. After being processed by the digital signal converter and the processor, data appears on the display screen. When a situation occurs, the warning light lights up, and the low-temperature underground circulation medium enters the geothermal unit, exchanges heat with the refrigerant in the evaporator, causing the refrigerant to evaporate and absorb cold. The refrigerant is compressed into high-temperature and high-pressure gas by the compressor through the guide pipe, and then transported by the first conduction pipe through the first energy storage transmission tank and the guide pipe to the indoor heat exchanger for heat exchange. At the same time, the internal medium of the first energy storage transmission tank stores cold energy and transfers the cold to the room. The refrigerant condenses into liquid in the condenser, is guided by the second conduction pipe, passes through the second energy storage transmission tank, and re-enters the evaporator after reducing the pressure through the thermal expansion valve to start a new cycle.

[0020] S4. When heating is in progress, the heating mode is opposite to the cooling mode. The lower conduction rod releases heat to the underground through the underground heat exchanger, which is fed back to the signal receiver by the pulse signal transmitter. After being processed by the digital signal converter and the processor, data appears on the display screen. When a situation occurs, the warning light comes on. The refrigerant in the heat pump unit absorbs heat from the outdoor air (or residual heat in the underground circulating medium) in the evaporator and is compressed into a high-temperature and high-pressure gas by the compressor. The high-temperature and high-pressure refrigerant exchanges heat with the indoor circulating water in the condenser, and then is transported by the guide pipe through the first conduction pipe and the first energy storage transmission tank. At the same time, the internal medium of the first energy storage transmission tank stores thermal energy and transfers heat to the room. After the refrigerant is condensed into liquid in the condenser, it is guided by the second conduction pipe, passes through the second energy storage transmission tank, and re-enters the evaporator after being depressurized by the thermal expansion valve to start a new cycle.

[0021] Beneficial effects of the present invention:

[0022] 1. According to previous geothermal units, during the exchange process, due to the cold and hot conversion transmission airflow according to the use requirements, it produces extreme temperature, which is easy to cause pipeline sealing leakage, and due to the local deep burial, it is not easy to detect in time, which increases its energy consumption and reduces the overall temperature control effect. The difference is that the evaporator for heat exchange and the condenser for heating conduction control are relatively parallelly arranged to keep the internal medium stable and avoid tilting. Through the compressor, which is located above the evaporator and the condenser, it can be responsible for timely compression and transportation of refrigerant so that it circulates under different states, thereby increasing the control performance. The node protection component is located at both ends of the evaporator and the condenser, which can be used to form a sealing protection for the pipeline interface to avoid leakage. With the pressure shock output and input, a two-way protection is formed. The first energy storage transmission tank and the second energy storage transmission tank are located outside the evaporator and the condenser, which can be used to output cold and hot energy and absorb environmental cold and heat for circulation, thereby reducing energy consumption and maintaining the overall transmission effect.

[0023] 2. When cooling is carried out, the lower conduction rod absorbs cold air from the underground through the underground pipe system. At the same time, the metering valve can monitor the internal flow state, which is fed back to the signal receiver by the pulse signal transmitter. After being processed by the digital signal converter and processor, data appears on the display screen. When a situation occurs, the warning light comes on, and the low-temperature underground circulating medium enters the geothermal unit, exchanges heat with the refrigerant in the evaporator, increasing the overall control effect.

[0024] 3. When performing node protection, the evaporator and condenser are set in parallel and connected to the lower conduction rod. The node protection components are respectively installed on both ends of the evaporator and the condenser. The positioning bolts are adjusted so that the adapter ring can protect the outer periphery of the pipeline. The direction of the insulating ring is adjusted so that the grounding rod is grounded. When pressure shock occurs, the adapter ring and the protection ring perform two-way protection. The temperature sensor can sense whether the ambient temperature difference is too large, and feedback is given through the wireless signal transmitter for timely warning. The spring column passes through the damper to perform impact mitigation protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the geothermal unit of the present invention;

[0026] Figure 2 This is a schematic diagram of the sealing ring of the geothermal unit of the present invention;

[0027] Figure 3 This is a schematic diagram of a node ring of a geothermal unit according to the present invention;

[0028] Figure 4 This is a schematic diagram of the first conduction pipe of the geothermal unit of the present invention;

[0029] Figure 5It is a schematic diagram of the compressor and electric control box of the geothermal unit of the present invention;

[0030] Figure 6 It is a schematic diagram of the underground conducting rod of the geothermal unit of the present invention;

[0031] Figure 7 This is a schematic diagram of the first energy storage transmission tank of the geothermal unit of the present invention;

[0032] Figure 8 It is a schematic diagram of the node protection component of the geothermal unit of the present invention.

[0033] Description of reference numerals: 1. evaporator; 2. condenser; 3. compressor; 4. electric control box; 5. balance carrier plate; 6. underground conduction rod; 7. first energy storage transmission tank; 8. second energy storage transmission tank; 9. node protection assembly; 101. sealing ring; 102. indicator light; 103. node ring; 104. medium pipe; 105. first conduction pipe; 106. second conduction pipe; 107. first valve sleeve; 108. second valve sleeve; 109. thermal expansion valve; 110. pressure rubber balloon; 301. protection box; 302. balance plate; 303. protection plate; 304. pressure valve; 305. guide pipe; 401. maintenance door; 402. 02, display screen; 403, antenna; 404, warning light; 601, insulation box; 602, pulse signal transmitter; 603, metering valve; 701, mounting plate; 702, mounting bolts; 703, delivery pipe; 704, reversing valve; 705, solenoid control valve; 706, guide pipe; 901, sleeve box; 902, perforation; 903, positioning hole; 904, tension plate; 905, temperature sensing strip; 906, protective ring; 907, shock-absorbing ball; 908, adapter ring; 909, temperature sensing rod; 910, spring column; 911, positioning bolt; 912, insulating ring; 913, insulating sleeve; 914, grounding rod. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] See also Figure 1-3The present invention provides an embodiment: a geothermal unit for a medium-deep geothermal system, comprising an evaporator 1, a condenser 2, a compressor 3, an electric control box 4, a balancing carrier plate 5, an underground conduction rod 6, a first energy storage transmission tank 7, a second energy storage transmission tank 8 and a node protection component 9; the evaporator 1 for heat exchange and the condenser 2 for heating conduction control are arranged in parallel, the evaporator 1 and the condenser 2 are connected above and provided with a compressor 3 for compressing and transporting refrigerant so that it circulates under different states, the top of the compressor 3 is provided with an electric control box 4 for controlling the overall operation, both ends of the evaporator 1 and the condenser 2 are provided with a node protection component 9 for sealing and protecting the pipeline interface to prevent leakage, the lower end of the node protection component 9 is provided with a balancing carrier plate 5 for supporting the whole, the lower ends of the evaporator 1 and the condenser 2 are provided with an underground conduction rod 6 for conducting the medium in depth, and the periphery of the evaporator 1 and the condenser 2 are provided with a first energy storage transmission tank 7 and a second energy storage transmission tank 8 for outputting cold and hot energy and absorbing environmental cold and hot energy for circulation.

[0036] See also Figure 1-4 In this embodiment, two sets of sealing rings 101 are linearly sleeved on the evaporator 1 and the condenser 2. The side wall of the sealing ring 101 is provided with a pressure sensor, a built-in signal and a temperature sensor deep inside. The top of the built-in signal is provided with an indicator light 102. The inside of the evaporator 1 and the condenser 2 is provided with two sets of medium pipes 104 for discharge and access circulation. A node ring 103 is provided between the medium pipe 104 and the evaporator 1 and the condenser 2. The node ring 103 can be used for sealing protection. The extension direction of the two sets of medium pipes 104 is provided with a first conduction pipe 1 05 and the second conduction tube 106, the first conduction tube 105 and the second conduction tube 106 are respectively provided with a first valve sleeve 107 and a second valve sleeve 108 at one end away from the node ring 103, and a thermal expansion valve 109 is provided inside the first valve sleeve 107 and the second valve sleeve 108. The first conduction tube 105 and the second conduction tube 106 are provided with a pressure rubber balloon 110 at one end away from the first valve sleeve 107 and the second valve sleeve 108, and a rubber damping spring is provided inside the pressure rubber balloon 110. The pressure rubber balloon 110 can be used to protect against collision due to excessive pressure.

[0037] See also Figure 3-5In this embodiment, a protective box 301 is provided on the outer side of the compressor 3, a balancing plate 302 is symmetrically provided on the bottom of the compressor 3, guide pipes 305 that penetrate into the evaporator 1 and the condenser 2 are provided on both sides of the compressor 3, a protective plate 303 is provided between the guide pipe 305 and the compressor 3, a pressure valve 304 is provided inside the protective plate 303, and output control can be performed through the pressure valve 304, and an electrical signal receiver, a digital signal converter and a processor are provided inside the electric control box 4 in sequence, the digital signal converter model is M5TS-24-R / K / BL, the signal receiver model is TL-WN726N, and the processor model is Intel Corei5. A maintenance door 401 is provided on the outer side of the electric control box 4, and a display screen 402 electrically connected to the digital signal converter is provided on the maintenance door 401, an antenna 403 is provided on the top of the signal receiver, and the signal receiver model is, and a warning light 404 is provided on the top of the antenna 403, and an early warning display can be performed through the warning light 404.

[0038] See also Figure 4-6 In this embodiment, a temperature-isolating box 601 is provided in the middle of the underground conductive rod 6, and a pulse signal transmitter 602 is provided inside the temperature-isolating box 601, and the model of the pulse signal transmitter 602 is Agilent81134A. A metering valve 603 is provided inside the pulse signal transmitter 602, and the flow medium can be monitored through the metering valve 603. The bottom of the first energy storage transmission tank 7 and the second energy storage transmission tank 8 are both provided with a mounting plate 701, and the bottom of the mounting plate 701 is circumferentially provided with mounting bolts 702 near the edge. The first energy storage transmission tank 7 and the second energy storage transmission tank 8 are provided with a conductive medium, and the top of the first energy storage transmission tank 7 and the second energy storage transmission tank 8 are provided with a delivery pipe 703, and the top of the delivery pipe 703 is provided with a reversing valve 704, and the reversing valve 704 is provided with an electromagnetic control valve 705 inside, and both sides of the electromagnetic control valve 705 are provided with guide pipes 706, and the electromagnetic control valve 705 can be used to control the delivery.

[0039] See also Figure 1-8In this embodiment, the node protection component 9 includes a casing 901, a through hole 902, a positioning hole 903, a tension plate 904, a temperature sensing strip 905, a protection ring 906, a shock absorbing ball 907, an adapter ring 908, a temperature sensing rod 909, a spring column 910, a positioning bolt 911, an insulating ring 912, an insulating sleeve 913 and a grounding rod 914. The casing 901 is provided with a through hole 902 in the center, and positioning holes 903 are provided on both sides of the casing 901. A tension plate 904 is provided in the center of the casing 901, and a temperature sensing strip 905 is provided in the center of the tension plate 904. A built-in wireless signal transmitter is provided inside the temperature sensing strip 905, and the model of the wireless signal transmitter is TP-LINK. TL-WN726N can transmit signals through a wireless signal transmitter. A protective ring 906 is provided at the top center and the bottom center of the tension plate 904. A plurality of temperature sensing rods 909 are provided along the inner side of the protective ring 906. A temperature sensor electrically connected to the wireless signal transmitter is provided inside the temperature sensing rod 909. The model of the temperature sensor is PT100. Protective rings 906 are symmetrically provided on the tension plate 904. A plurality of shock-absorbing balls 907 are provided on the periphery of the protective ring 906. Spring columns 910 passing through the positioning holes 903 are provided at both ends of the tension plate 904. A damper is provided inside the spring column 910. A positioning bolt 911 is sleeved on the spring column 910. An insulating ring 912 is provided on one side of the positioning bolt 911. A grounding rod 914 is provided at the lower end of the insulating ring 912. An insulating sleeve 913 is sleeved on the end of the spring column 910. The grounding rod 914 can reduce the static electricity caused by external drying and increase the service life of internal electronic components.

[0040] According to another aspect of the present invention, a geothermal unit for a medium-deep geothermal system and a method thereof are provided, comprising the following steps:

[0041] S1. Pre-select a suitable installation position, dig a low and deep channel, make the low conductive rod go deep into the corresponding position, set the evaporator 1 and the condenser 2 in parallel and connect and install the low conductive rod, and then respectively sleeve and install the node protection assembly 9 at both ends of the evaporator 1 and the condenser 2, adjust the positioning bolt 911, make the adapter ring 908 protect the corresponding outer periphery of the pipeline, and adjust the direction of the insulating ring 912, so that the grounding rod 914 is grounded;

[0042] S2, connect the guide tube 706 on the first energy storage transmission tank 7 to the input end of the indoor energy supply and heat supply transmission equipment, connect the guide tube 706 on the second energy storage transmission tank 8 to the output end of the indoor energy supply and heat supply transmission equipment, adjust the parameters through the display screen 402, and start the whole operation;

[0043] S3. When cooling is performed, the lower conduction rod absorbs cold from the underground through the underground buried pipe system. At the same time, the metering valve 603 can monitor the internal flow state, which is fed back to the signal receiver by the pulse signal transmitter 602. After being processed by the digital signal converter and the processor, data appears on the display screen 402. When a situation occurs, the warning light 404 lights up, and the low-temperature underground circulating medium enters the geothermal unit, exchanges heat with the refrigerant in the evaporator 1, causing the refrigerant to evaporate and absorb cold. The refrigerant is compressed into a high-temperature and high-pressure gas by the compressor 3 through the guide pipe 305, and then transported by the first conduction pipe 105 through the first energy storage transmission tank 7 and the guide pipe 706 to exchange heat with the indoor heat exchanger. At the same time, the medium inside the first energy storage transmission tank 7 stores cold energy and transfers the cold to the room.

[0044] The refrigerant condenses into liquid in the condenser 2, is guided by the second transfer pipe 106, passes through the second energy storage transmission tank 8, and re-enters the evaporator 1 after being depressurized by the thermal expansion valve 109, and a new cycle begins;

[0045] S4. When heating is carried out, the heating mode is opposite to the cooling mode. The lower conduction rod releases heat to the underground through the underground heat exchanger, and the heat is fed back to the signal receiver by the pulse signal transmitter 602. After being processed by the digital signal converter and the processor, data appears on the display screen 402. When a situation occurs, the warning light 404 lights up. The refrigerant in the heat pump unit absorbs heat from the outdoor air (or residual heat in the underground circulating medium) in the evaporator 1, and is compressed into a high-temperature and high-pressure gas by the compressor 3. The high-temperature and high-pressure refrigerant exchanges heat with the indoor circulating water in the condenser 2, and then is transported by the first conduction pipe 105 through the first energy storage transmission tank 7 and the guide pipe 706. During the transportation, the internal medium of the first energy storage transmission tank 7 stores thermal energy and transfers heat to the room. After the refrigerant is condensed into liquid in the condenser 2, it is guided by the second conduction pipe 106, passes through the second energy storage transmission tank 8, and re-enters the evaporator 1 after being reduced in pressure by the thermal expansion valve 109 to start a new cycle.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A geothermal unit for a medium-deep geothermal system, comprising an evaporator; characterized in that: It also includes a condenser, a compressor, an electrical control box, a balancing carrier plate, an underground conduction rod, a first energy storage transmission tank, a second energy storage transmission tank and a node protection component; an evaporator for heat exchange and a condenser for heating conduction control are arranged in parallel with each other, and a compressor for compressing and transporting refrigerant so that it circulates under different conditions is provided above the evaporator and the condenser, and an electrical control box for controlling the overall operation is provided on the top of the compressor. Both ends of the evaporator and the condenser are provided with a node protection component for sealing and protecting the pipeline interface to prevent leakage, and the lower end of the node protection component is provided with a balancing carrier plate for supporting the whole, and the lower ends of the evaporator and the condenser are provided with an underground conduction rod for conducting the medium deep underground, and the periphery of the evaporator and the condenser are provided with a first energy storage transmission tank and a second energy storage transmission tank for outputting cold and hot energy and absorbing environmental cold and hot energy for circulation; Two sets of sealing rings are linearly sleeved on the evaporator and condenser. The side walls of the sealing rings are deep inside with air pressure sensors, built-in signal devices and temperature sensors. An indicator light is set on the top of the built-in signal device. Two sets of medium pipes for discharge and connection circulation are set inside the evaporator and condenser. Node rings are set between the medium pipes and the evaporator and condenser.

2. A geothermal unit for a medium-deep geothermal system according to claim 1, characterized in that: The two groups of medium pipes are respectively provided with a first conduction pipe and a second conduction pipe in the extension direction, and the first conduction pipe and the second conduction pipe are respectively provided with a first valve sleeve and a second valve sleeve at one end away from the node ring, and thermal expansion valves are provided inside the first valve sleeve and the second valve sleeve. The first conduction pipe and the second conduction pipe are provided with a pressure rubber balloon at one end away from the first valve sleeve and the second valve sleeve, and a rubber damping spring is provided inside the pressure rubber balloon.

3. A geothermal unit for a medium-deep geothermal system according to claim 1, characterized in that: A protection box is provided on the outer side of the compressor, a balance plate is symmetrically provided on the bottom of the compressor, guide pipes that penetrate into the evaporator and the condenser are provided on both sides of the compressor, a protection plate is provided between the guide pipe and the compressor, and a pressure valve is provided inside the protection plate.

4. A geothermal unit for a medium-deep geothermal system according to claim 1, characterized in that: The interior of the electric control box is equipped with an electrical signal receiver, a digital signal converter and a processor in sequence. A maintenance door is provided on the outside of the electric control box. A display screen electrically connected to the digital signal converter is provided on the maintenance door. An antenna is provided on the top of the signal receiver, and a warning light is provided on the top of the antenna.

5. The geothermal unit for a medium-deep geothermal system according to claim 1, characterized in that: A temperature-insulating box is arranged in the middle of the underground conductive rod, a pulse signal transmitter is arranged inside the temperature-insulating box, and a metering valve is arranged inside the pulse signal transmitter.

6. A geothermal unit for a medium-deep geothermal system according to claim 1, characterized in that: The first energy storage transmission tank and the second energy storage transmission tank are both provided with mounting plates at the bottom, mounting bolts are circumferentially provided near the edge of the bottom of the mounting plates, conductive media are provided inside the first energy storage transmission tank and the second energy storage transmission tank, delivery pipes are provided on the tops of the first energy storage transmission tank and the second energy storage transmission tank, a reversing valve is provided on the tops of the delivery pipes, an electromagnetic control valve is provided inside the reversing valve, and guide pipes are provided on both sides of the electromagnetic control valve.

7. The geothermal unit for a medium-deep geothermal system according to claim 1, characterized in that: The node protection assembly includes a casing, a perforation, a positioning hole, a tension plate, a temperature sensing strip, a protection ring, a shock-absorbing ball, an adapter ring, a temperature sensing rod, a spring column, a positioning bolt, an insulating ring, an insulating sleeve and a grounding rod. A perforation is provided in the center of the casing, and positioning holes are provided on both sides of the casing. A tension plate is provided in the center of the casing, a temperature sensing strip is provided in the center of the tension plate, and a built-in wireless signal transmitter is provided inside the temperature sensing strip.

8. A geothermal unit for a medium-deep geothermal system according to claim 7, characterized in that: A protective ring is provided at the top center and the bottom center of the tension plate, a plurality of groups of temperature sensing rods are provided along the inner side of the protective ring, a temperature sensor electrically connected to the wireless signal transmitter is provided inside the temperature sensing rod, protective rings are symmetrically provided on the tension plate, a plurality of groups of shock-absorbing balls are provided on the periphery of the protective ring, spring columns passing through the positioning holes are provided at both ends of the tension plate, a damper is provided inside the spring column, a positioning bolt is sleeved on the spring column, an insulating ring is provided on one side of the positioning bolt, a grounding rod is provided at the lower end of the insulating ring, and an insulating sleeve is sleeved on the end of the spring column.

9. A geothermal unit for a medium-deep geothermal system and a method thereof, comprising a geothermal unit for a medium-deep geothermal system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Pre-select a suitable installation location, dig an underground channel, make the underground conductive rod go deep into the corresponding position underground, set the evaporator and condenser in parallel and connect them to the underground conductive rod, and then install the node protection components on both ends of the evaporator and condenser respectively, adjust the positioning bolts so that the adapter ring can protect the outer periphery of the corresponding pipeline, and adjust the direction of the insulating ring so that the grounding rod is grounded; S2. Connect the guide tube on the first energy storage transmission tank to the input end of the indoor energy supply and heat supply transmission equipment, respectively, and connect the guide tube on the second energy storage transmission tank to the output end of the indoor energy supply and heat supply transmission equipment, respectively, and adjust the parameters through the display screen to start the overall operation; S3. When cooling is performed, the underground conduction rod absorbs cold from the underground through the underground buried pipe system. At the same time, the metering valve monitors the internal flow state, which is fed back to the signal receiver by the pulse signal transmitter. After being processed by the digital signal converter and the processor, data appears on the display screen. When a situation occurs, the warning light lights up, and the low-temperature underground circulation medium enters the geothermal unit, exchanges heat with the refrigerant in the evaporator, causing the refrigerant to evaporate and absorb cold. The refrigerant is compressed into high-temperature and high-pressure gas by the compressor through the guide pipe, and then transported by the guide pipe through the first conduction pipe and the first energy storage transmission tank to the indoor heat exchanger for heat exchange. At the same time, the medium inside the first energy storage transmission tank stores cold energy and transfers the cold to the room. The refrigerant condenses into liquid in the condenser, is guided by the second conduction pipe, passes through the second energy storage transmission tank, and re-enters the evaporator after reducing the pressure through the thermal expansion valve to start a new cycle. S4. When heating is in progress, the heating mode is opposite to the cooling mode. The underground conduction rod releases heat to the underground through the underground heat exchanger, which is fed back to the signal receiver by the pulse signal transmitter. After being processed by the digital signal converter and the processor, data appears on the display screen. When a situation occurs, the warning light comes on. The refrigerant in the heat pump unit absorbs heat from the outdoor air or residual heat in the underground circulating medium in the evaporator, and is compressed into high-temperature and high-pressure gas by the compressor. The high-temperature and high-pressure refrigerant exchanges heat with the indoor circulating water in the condenser, and then is transported by the guide pipe through the first conduction pipe and the first energy storage transmission tank. At the same time, the internal medium of the first energy storage transmission tank stores thermal energy and transfers heat to the room. After the refrigerant is condensed into liquid in the condenser, it is guided by the second conduction pipe, passes through the second energy storage transmission tank, and re-enters the evaporator after being depressurized by the thermal expansion valve to start a new cycle.

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