A geothermal resource recovery greenhouse planting heating device

Abstract

The utility model discloses a kind of geothermal resource recovery greenhouse planting heating device, including geothermal collection unit, filter, heat exchanger, heat storage tank, cooling fin, temperature sensor B and controller, geothermal collection unit includes heat collecting pipe, return pipe and circulating pump A, heat collecting pipe is connected to filter, circulating pump A is set between heat collecting pipe and filter, filter is connected to heat exchanger by pipeline, heat exchanger is connected with return pipe;Heat exchanger is connected to heat storage tank by pipeline, heat storage tank is connected to the water inlet end of cooling fin by pipeline and circulating pump B, the water outlet end of cooling fin is connected to heat exchanger by pipeline, temperature sensor B is connected controller.The utility model utilizes geothermal resource as main heating energy, greatly reduce the dependence on traditional fossil energy, reduce energy consumption and pollutant emission;The adoption of plate heat exchanger can efficiently realize the heat exchange between geothermal resource and heating medium, further improve the recycling rate of geothermal resource.

Description

Technical Field

[0001] This utility model relates to the field of agricultural planting equipment technology, and in particular to a geothermal resource recovery greenhouse planting heating device. Background Technology

[0002] Maintaining a suitable temperature is one of the key factors for ensuring normal crop growth in the greenhouse industry. Currently, the commonly used heating methods in greenhouse cultivation mainly rely on traditional forms such as coal-fired, gas-fired, or electric heating. However, these heating methods have many drawbacks: on the one hand, they are highly dependent on traditional fossil fuels, and as energy shortages become increasingly prominent, heating costs continue to rise; on the other hand, the energy consumption process generates large amounts of pollutants such as carbon dioxide and sulfur dioxide, causing serious environmental pollution and contradicting the current green and environmentally friendly development concept.

[0003] Meanwhile, geothermal resources, as a clean and renewable energy source, have advantages such as abundant reserves, wide distribution, and stable reliability, and have broad application prospects in the field of energy utilization. However, at present, the application of geothermal resources in greenhouse heating is still in its initial stage, with problems such as low geothermal resource recovery efficiency, unstable heating temperature, complex equipment structure, and inconvenient maintenance, which seriously restrict the large-scale application of geothermal resources in greenhouse heating. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a geothermal resource recovery greenhouse planting heating device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A geothermal resource recovery greenhouse heating device includes a geothermal collection unit, a filter, a heat exchanger, a heat storage tank, heat sinks, a temperature sensor B, and a controller. The geothermal collection unit includes a heat collection pipe, a return pipe, and a circulation pump A. The heat collection pipe is connected to the filter, and the circulation pump A is located between the heat collection pipe and the filter. The filter is connected to the heat exchanger via a pipe, and the heat exchanger is connected to the return pipe. The heat exchanger is connected to the heat storage tank via a pipe, and the heat storage tank is connected to the water inlet of the heat sink via a pipe and the circulation pump B. The water outlet of the heat sink is connected to the heat exchanger via a pipe.

[0007] Furthermore, the heat storage tank is connected to the heat exchange outlet of the heat exchanger via a hot water pipe, and a solenoid valve B is installed on the hot water pipe; the pipe between the heat storage tank and the heat sink is a heating pipe, and a solenoid valve D and a temperature sensor A are installed on the heating pipe, with the solenoid valve D located before the circulating pump B; a water supply pipe is installed at the top of the heat storage tank, and a solenoid valve C is installed on the water supply pipe; a drain pipe is installed at the bottom of the side wall of the heat storage tank, and a solenoid valve A is installed on the drain pipe; an electric heater and a water level sensor are installed inside the heat storage tank.

[0008] Furthermore, the temperature sensor A, temperature sensor B, circulation pump A, circulation pump B, solenoid valve A, solenoid valve B, solenoid valve C, solenoid valve D, electric heater, and water level sensor are all connected to the controller.

[0009] Furthermore, the temperature sensor B is installed in the greenhouse.

[0010] Furthermore, the heat exchanger is a plate heat exchanger; the heat storage tank contains a heat exchange medium, which is water or antifreeze.

[0011] Furthermore, the heat extraction pipe and return pipe are installed in the geothermal well.

[0012] Furthermore, the heat storage box includes an inner liner and an insulation layer, wherein the inner liner is made of stainless steel and the insulation layer is made of polyurethane foam.

[0013] Furthermore, the heat sinks are provided in multiple sets and are reasonably distributed inside the greenhouse.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention utilizes geothermal resources as the primary heating energy source. Geothermal resources are clean and renewable, significantly reducing reliance on traditional fossil fuels and decreasing energy consumption and pollutant emissions. The use of plate heat exchangers efficiently facilitates heat exchange between geothermal resources and the heating medium, further improving the recovery and utilization rate of geothermal resources. A heat storage tank and electric heater are included as auxiliary devices. When geothermal resources are insufficient, the heat stored in the heat storage tank and the electric heater can supplement the heat supply, ensuring heating stability. This keeps the greenhouse temperature within a suitable range for crop growth. The structure is clear, the connection method is simple, and it is easy to install and maintain. The filter reduces damage to the equipment from impurities and extends its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural diagram of the internal structure of the heat storage box of this utility model;

[0018] Figure 3 This is a schematic diagram of the controller connection of this utility model;

[0019] In the diagram: 1. Geothermal collection unit; 11. Heat collection pipe; 12. Return pipe; 13. Circulation pump A; 2. Filter; 3. Heat exchanger; 4. Heat storage tank; 41. Inner liner; 42. Insulation layer; 43. Drain pipe; 431. Solenoid valve A; 44. Hot water pipe; 441. Solenoid valve B; 45. Water supply pipe; 451. Solenoid valve C; 46. Heating pipe; 461. Solenoid valve D; 47. Electric heater; 48. Water level sensor; 5. Heat sink; 6. Circulation pump B; 7. Temperature sensor A; 8. Controller; 9. Temperature sensor B.

[0020] Figure 1 The direction of the middle arrow indicates the direction of the medium circulation. The geothermal medium circulates along the heat collection pipe 11 → filter 2 → heat exchanger 3 → return pipe 12; the heat exchange medium circulates along the heat exchanger 3 → heat storage box 4 → heat sink 5 → heat exchanger 3. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] Example 1

[0023] Referring to the accompanying drawings and descriptions, this utility model provides a geothermal resource recovery greenhouse planting heating device, the structure of which includes a geothermal collection unit 1, a filter 2, a heat exchanger 3, a heat storage box 4, heat sinks 5, a temperature sensor B9, and a controller 8. The geothermal collection unit 1 includes a heat collection pipe 11, a return pipe 12, and a circulation pump A13. The heat collection pipe 11 is connected to the filter 2, and the circulation pump A13 is located between the heat collection pipe 11 and the filter 2. The filter 2 is connected to the heat exchanger 3 through a pipe, and the heat exchanger 3 is connected to the return pipe 12. The heat exchanger 3 is connected to the heat storage box 4 through a pipe, and the heat storage box 4 is connected to the water inlet of the heat sink 5 through a pipe and the circulation pump B6. The water outlet of the heat sink 5 is connected to the heat exchanger 3 through a pipe.

[0024] The heat storage tank 4 is connected to the heat exchange outlet of the heat exchanger 3 via a hot water pipe 44, on which a solenoid valve B441 is installed. The pipe between the heat storage tank 4 and the heat sink 5 is a heating pipe 46, on which a solenoid valve D461 and a temperature sensor A7 are installed. The solenoid valve D461 is located before the circulating pump B6. A water supply pipe 45 is installed on the top of the heat storage tank 4, on which a solenoid valve C451 is installed. A drain pipe 43 is installed at the bottom of the side wall of the heat storage tank 4, on which a solenoid valve A431 is installed. An electric heater 47 and a water level sensor 48 are installed inside the heat storage tank 4.

[0025] Temperature sensor A7, temperature sensor B9, circulating pump A13, circulating pump B6, solenoid valve A431, solenoid valve B441, solenoid valve C451, solenoid valve D461, electric heater 47, and water level sensor 48 are all connected to controller 8; temperature sensor B9 is installed inside the greenhouse.

[0026] Heat exchanger 3 is a plate heat exchanger 3; the heat storage box 4 contains the heat exchange medium, which is water;

[0027] The heat extraction pipe 11 and the return pipe 12 are installed in the geothermal heat extraction well;

[0028] The heat storage box 4 includes an inner liner 41 and an insulation layer 42. The inner liner 41 is made of stainless steel, and the insulation layer 42 is made of polyurethane foam.

[0029] There are 4 sets of heat sinks 5, which are reasonably distributed in the 100㎡ greenhouse.

[0030] Working principle:

[0031] Geothermal extraction and heat exchange process:

[0032] The heat extraction pipe 11 and return pipe 12 are buried in the geothermal well. After the circulation pump A13 is started, it drives the geothermal medium groundwater to flow out from the heat extraction pipe 11 and be transported to the filter 2 through the pipeline to filter out the mud, sand, impurities, etc. in the water to avoid clogging the heat exchanger 3 or the pipeline. The filtered geothermal medium enters the plate heat exchanger 3 and exchanges heat with the heat exchange medium water transported by the heat storage tank 4. After the heat of the geothermal medium is transferred to the heat exchange medium, the temperature decreases and it flows back to the geothermal well through the return pipe 12 to complete the geothermal cycle.

[0033] The heat exchange medium heated by the heat exchanger 3 flows into the heat storage tank 4 through the hot water pipe 44 (solenoid valve B441 is open) for storage. When the greenhouse needs heating, the controller 8 receives the signal from the temperature sensor B9 (if the greenhouse temperature is lower than the set threshold), controls the solenoid valve D461 to open, and the circulation pump B6 starts, which transports the high-temperature heat exchange medium in the heat storage tank 4 to multiple sets of heat sinks 5 through the heating pipe 46. The heat sinks 5 release heat to the greenhouse to maintain the indoor temperature. The low-temperature heat exchange medium after heat dissipation flows back to the heat exchanger 3 through the pipe, is reheated, and enters the next cycle.

[0034] Water level control: The water level sensor 48 in the heat storage tank 4 monitors the liquid level in real time. If the liquid level is lower than the set value, the controller 8 opens the solenoid valve C451 to replenish water through the water supply pipe 45. If the heat storage tank 4 needs to be cleaned or repaired, the solenoid valve A431 is opened to drain water through the drain pipe 43.

[0035] Temperature compensation: If the geothermal resources are insufficient, such as the temperature of the heat exchange medium output by heat exchanger 3 being lower than the set temperature of heat storage box 4, temperature sensor A7 transmits a signal to controller 8, and controller 8 starts electric heater 47 to provide auxiliary heating to the medium in heat storage box 4 to ensure stable heating temperature.

[0036] The controller 8 adopts a PLC controller, which integrates the signals of temperature sensor A7, temperature sensor B9, and water level sensor 48, and controls the start and stop of circulation pump A13 and circulation pump B6, as well as the switching of solenoid valves A431, B441, C451, and D461, and the start and stop of electric heater, to achieve fully automated operation of the entire process.

Claims

1. A geothermal resource recovery greenhouse planting heat supply device, characterized in that: The system includes a geothermal energy collection unit, a filter, a heat exchanger, a heat storage tank, radiators, a temperature sensor B, and a controller. The geothermal energy collection unit includes a heat collection pipe, a return pipe, and a circulation pump A. The heat collection pipe is connected to the filter, and the circulation pump A is located between the heat collection pipe and the filter. The filter is connected to the heat exchanger via a pipe, and the heat exchanger is connected to the return pipe. The heat exchanger is connected to the heat storage tank via a pipe, and the heat storage tank is connected to the inlet end of the radiators via a pipe and the circulation pump B. The outlet end of the radiators is connected to the heat exchanger via a pipe.

2. The geothermal resource recovery greenhouse planting heating device according to claim 1, characterized in that: The heat storage tank is connected to the heat exchange outlet of the heat exchanger via a hot water pipe, and a solenoid valve B is installed on the hot water pipe. The pipe between the heat storage tank and the heat sink is a heating pipe, and a solenoid valve D and a temperature sensor A are installed on the heating pipe. The solenoid valve D is located before the circulating pump B. A water supply pipe is installed on the top of the heat storage tank, and a solenoid valve C is installed on the water supply pipe. A drain pipe is installed at the bottom of the side wall of the heat storage tank, and a solenoid valve A is installed on the drain pipe. An electric heater and a water level sensor are installed inside the heat storage tank.

3. The geothermal resource recovery greenhouse planting heating device according to claim 2, characterized in that: Temperature sensor A, temperature sensor B, circulation pump A, circulation pump B, solenoid valve A, solenoid valve B, solenoid valve C, solenoid valve D, electric heater, and water level sensor are all connected to the controller.

4. A geothermal resource recovery greenhouse planting heating device according to claim 3, characterized in that: The temperature sensor B is installed in the greenhouse.

5. A geothermal resource recovery greenhouse planting heating device according to claim 4, characterized in that: The heat exchanger is a plate heat exchanger; the heat storage tank contains a heat exchange medium, which is water or antifreeze.

6. A geothermal resource recovery greenhouse planting heating device according to claim 5, characterized in that: The heat extraction pipe and return pipe are installed in the geothermal well.

7. A geothermal resource recovery greenhouse planting heating device according to claim 6, characterized in that: The heat storage box includes an inner liner and an insulation layer. The inner liner is made of stainless steel, and the insulation layer is made of polyurethane foam.

8. A geothermal resource recovery greenhouse planting heating device according to claim 7, characterized in that: The heat sink is provided in multiple sets.

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