Control device for rural solar energy-air source heat pump coupled hot air type heat storage ground

Abstract

The utility model relates to the technical field of building energy conservation and control, in particular to a control device of a rural solar energy-air source heat pump coupling hot air type heat storage ground. During use, according to different time periods, the control temperatures of the solar heat collection temperature sensor, the water temperature sensor and the indoor air temperature sensor and the start-stop time of the solar heat collection pump, the hot water pump and the circulating water pump are set, and the temperature controller and the time controller are used for controlling operation of the solar heat collection pump, the hot water pump and the circulating water pump in a two-stage mode. According to different heat loads needed in different time periods, automatic operation and two-stage heat supply are achieved, the problems that a water pump or equipment is frequently started and stopped due to fixed temperature control, the solar heat collection effect is poor, the heat supply amount is not matched with the heat load requirement of a resident, heat is wasted and the like are solved, normal operation of the system is guaranteed, and electric energy consumption or operation cost is reduced. The solar energy assurance rate is improved, the frequent starting condition of the system is reduced, and the matching degree of the heat supply amount and the heat load requirement of residents is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building energy saving and control, in particular to a control device for a rural solar energy-air source heat pump coupled hot wind type heat storage ground. Background Art

[0002] With the advancement of the national "carbon peak and carbon neutrality" policy, the transformation of clean heating in rural areas in the north has been widely carried out. The heat sources mostly use solar energy and air source heat pump technology, which can effectively reduce the consumption of fossil fuels.

[0003] After searching, it was found that: Application No. 202120096341.9 invented a solar heating control system for cold northern regions, including a client terminal, a controller, a heat preservation and heat storage box, a solar heat absorber, a photovoltaic storage panel, a heat dissipation heater and a life faucet. Farmers can install the heat dissipation heater indoors and use the client terminal to wirelessly remotely control the operation of the solar heat absorber, the photovoltaic storage panel, the heat preservation and water storage tank and the heat dissipation heater, which has the effect of remotely controlling the water temperature and is convenient for energy saving and environmental protection. Application No. 202311749155.0 discloses a solar energy and air source heat pump system and a control method thereof, which includes an air source heat pump unit, a solar unit and a heat preservation box; a first working fluid circulation system is arranged between the air source heat pump unit and the heat preservation box; a second working fluid circulation system is arranged between the heat preservation box and the solar unit, and a solenoid valve is arranged on the second working fluid circulation system, and the solenoid valve is used to control the opening and closing of the solar unit; a photothermal sensor is arranged on the solar unit, and an ambient temperature sensor is arranged on the air source heat pump unit. The control system can control the opening and closing of the solenoid valve according to the detection data of the photothermal sensor and the ambient temperature sensor, and can realize the intelligent control of the system and the automatic opening and closing of the solar unit. Application No. 202021091424.0 invented a solar energy and air source heat pump heating domestic hot water system, which includes a solar collector, an air source heat pump, a water storage tank, a temperature sensor, a controller and a circulation pump. The solar collector and the water storage tank are connected through a heating pipe, and the air source heat pump and the water storage tank are connected through an auxiliary pipe. The heating pipe and the auxiliary pipe are both provided with a circulation pump, and the circulation pump and the temperature sensor are electrically connected to the controller; the temperature sensor can detect the temperature of the water in the solar collector and the water storage tank and can transmit the temperature signal to the controller. The controller receives and processes the temperature signal. After processing the temperature signal, the controller controls the start or stop of the circulation pump to meet the heating and domestic hot water needs of farmers. Application No. 202020075509.3 discloses a heating system combining solar energy with air source heat pump and energy storage device, including solar panels, energy storage device and air source heat pump. Heating is provided by combining solar energy and air source heat pump, effectively avoiding the problem of reduced heating capacity and performance coefficient of air source heat pump caused by too low outdoor air temperature.

[0004] However, the clean heating transformation in the above patents usually ignores the terminal side. The solar or air source heat pump is directly connected to the traditional terminal (such as the radiator), and the system operation is only controlled at a fixed temperature. Since the sensor is affected by the surrounding environment during the data transmission process, there may be a sudden change or transition in the relevant data. If it is controlled at a fixed temperature, it is easy to cause the water pump or equipment to start and stop frequently, resulting in poor solar heat collection effect and reduced equipment service life.

[0005] For farmers in the north, their energy usage habits and needs are quite different from those of urban residents. The indoor temperature requirements are different at different times. From getting up in the morning to around 10:00, the heat load required by farmers at this time is large, and the indoor temperature requirements are high. However, the solar radiation intensity is high from 11:00 to 15:00 at noon, and the indoor heat load required is small. The temperature required at night can be 3~4℃ lower than the temperature required during the day. If the system is controlled at a constant temperature, it is easy to cause the heat supply to not match the heat load requirements of farmers, the solar energy guarantee rate is low, resulting in heat waste, increased electricity consumption, and failure to meet the energy or operating cost requirements of farmers at different times.

[0006] To this end, the utility model provides a control device for a rural solar energy-air source heat pump coupled with a hot wind type heat storage ground, which reduces heat waste, reduces power consumption or operating costs, and reduces the frequent start-up of the system. Utility Model Content

[0007] The utility model aims to solve the problems existing in the prior art and proposes a control device for a rural solar energy-air source heat pump coupled hot wind type heat storage ground.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A control device for a rural solar energy-air source heat pump coupled hot wind type heat storage ground comprises a hot wind type heat storage ground, a geothermal coil is laid in the hot wind type heat storage ground, the geothermal coil is connected to a hot water storage tank via a circulating water pump, the hot water storage tank is respectively connected to a solar collector and an air source heat pump unit via a solar heat collection pump and a hot water pump, a solar heat collection temperature sensor is arranged outside the solar collector, a water temperature sensor is arranged outside the hot water storage tank, an indoor air temperature sensor is arranged above the hot wind type heat storage ground, the solar heat collection pump is electrically connected to a solar radiation intensity sensor, the solar heat collection temperature sensor, the solar radiation intensity sensor, the water temperature sensor and the indoor air temperature sensor are electrically connected to a temperature controller, and the solar heat collection pump, the hot water pump and the circulating water pump are electrically connected to a time controller.

[0010] Preferably, the solar radiation intensity sensor and the solar heat collection temperature sensor are both electrically connected to the solar heat collection pump, and the water temperature sensor is electrically connected to the hot water pump and the circulating water pump.

[0011] Preferably, a heat exchange coil is coiled in the hot water storage tank, and the inlet and outlet of the heat exchange coil are respectively connected to the inlet and outlet of the geothermal coil.

[0012] Preferably, the solar thermal temperature sensor is installed in the connecting pipe between the solar thermal collector and the hot water storage tank and is close to the solar thermal collector, the water temperature sensor is installed in the middle of the hot water storage tank, and the indoor air temperature sensor is installed 1.5m away from the hot air type thermal storage ground.

[0013] Preferably, the solar thermal collector temperature sensor is located in the water outlet pipeline of the solar thermal collector.

[0014] Preferably, a heat transfer cavity is provided above the geothermal coil in the hot air type heat storage floor, the heat transfer cavity is connected to two circulation pipes arranged at staggered intervals, air valves are provided in both circulation pipes, and a fan is provided in one circulation pipe.

[0015] Preferably, the two air valves and the fan are both electrically connected to the indoor air temperature sensor.

[0016] Compared with the prior art, the utility model provides a control device for a rural solar energy-air source heat pump coupled hot wind type heat storage ground, which has the following beneficial effects:

[0017] During the operation of the entire equipment, the control temperatures of the solar thermal temperature sensor, water temperature sensor and indoor air temperature sensor are set in advance according to different time periods, and the normal start and stop times of the solar thermal pump, hot water pump and circulating water pump are set in the time controller according to the farmers' requirements. The temperature controller and time controller are used to control the operation of the solar thermal pump, hot water pump and circulating water pump in two stages, realizing the automatic operation and two-stage heating of the solar-air source heat pump coupled hot wind thermal storage ground according to the different heat loads required in different time periods, and solving the problems of frequent start and stop of water pumps or equipment, poor solar thermal collection effect, mismatch between heat supply and farmers' heat load demand, and heat waste caused by fixed temperature control, ensuring the normal operation of the system, reducing electricity consumption or operating costs, improving the solar energy guarantee rate, reducing the frequent start-up of the system, and improving the matching degree between heat supply and farmers' heat load demand.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall layout of the utility model.

[0020] Figure 2 This is a schematic diagram of equipment connection of the utility model.

[0021] Figure 3 It is a schematic diagram of the electrical control layout of the temperature controller of the present utility model.

[0022] Figure 4 This is a schematic diagram of the electrical control layout of the time controller of the utility model.

[0023] In the figure: 1. Solar collector; 2. Air source heat pump unit; 3. Hot water storage tank; 4. Heat exchange coil; 5. Hot air type heat storage ground; 6. Geothermal coil; 7. Solar heat collection pump; 8. Hot water pump; 9. Circulating water pump; 10. First air valve; 11. Second air valve; 12. Fan; 13. Solar heat collection temperature sensor; 14. Solar radiation intensity sensor; 15. Water temperature sensor; 16. Indoor air temperature sensor; 17. Temperature controller; 18. Time controller. DETAILED DESCRIPTION

[0024] The following will be combined with the attached embodiment of the utility model Figure 1-4 , the technical solutions in the embodiments of the utility model are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0025] In order to solve the problems existing in the prior art, the present embodiment provides a control device for a rural solar energy-air source heat pump coupled hot wind type heat storage ground, including a hot wind type heat storage ground 5, a geothermal coil 6 is laid in the hot wind type heat storage ground 5, the geothermal coil 6 is connected to a hot water storage tank 3 through a circulating water pump 9, the hot water storage tank 3 is connected to a solar collector 1 and an air source heat pump unit 2 through a solar heat collection pump 7 and a hot water pump 8 respectively, a solar heat collection temperature sensor 13 is provided outside the solar collector 1, a water temperature sensor 15 is provided outside the hot water storage tank 3, an indoor air temperature sensor 16 is provided above the hot wind type heat storage ground 5, the solar heat collection pump 7 is electrically connected to a solar radiation intensity sensor 14, the solar heat collection temperature sensor 13, the solar radiation intensity sensor 14, the water temperature sensor 15, and the indoor air temperature sensor 16 are electrically connected to a temperature controller 17, and the solar heat collection pump 7, the hot water pump 8, and the circulating water pump 9 are electrically connected to a time controller 18.

[0026] Principle details of this embodiment:

[0027] A control device for a rural solar-air source heat pump coupled hot wind type heat storage ground, comprising a hot wind type heat storage ground 5, a hot water storage tank 3, a solar collector 1, and an air source heat pump unit 2;

[0028] The hot air type heat storage floor 5 is spread indoors, and a spiral geothermal coil 6 is laid inside the hot air type heat storage floor 5. The water inlet of the geothermal coil 6 is connected to a circulating water pump 9, which is connected to the hot water storage tank 3. The upper side wall of the hot water storage tank 3 is connected to the water outlet of the geothermal coil 6.

[0029] The side walls of the hot water storage pipe are respectively connected with a solar heat collection pump 7 and a hot water pump 8. The solar heat collection pump 7 is connected with the water inlet of the solar thermal collector 1, and the water outlet of the solar thermal collector 1 is connected with the hot water storage tank 3. The hot water pump 8 is connected with the water inlet of the water storage tank of the air source heat pump unit 2, and the water outlet of the water storage tank of the air source heat pump unit 2 is connected with the hot water storage tank 3. The water inlet and outlet of the hot water storage tank 3, the water inlet and outlet of the solar thermal collector 1, and the water inlet and outlet of the air source heat pump unit 2 are all provided with valves.

[0030] A solar thermal collector 1 is provided with a solar thermal temperature sensor 13 outside the solar thermal collector 1, a water temperature sensor 15 is provided outside the hot water storage tank 3, an indoor air temperature sensor 16 is provided indoors above the hot air type thermal storage floor 5, the solar thermal pump 7 is electrically connected to a solar radiation intensity sensor 14, the solar thermal temperature sensor 13, the solar radiation intensity sensor 14, the water temperature sensor 15, and the indoor air temperature sensor 16 are electrically connected to a temperature controller 17 in common, and the solar thermal pump 7, the hot water pump 8, and the circulating water pump 9 are electrically connected to a time controller 18 in common.

[0031] The heat storage principle of this embodiment:

[0032] Through the solar heat pump 7 and the hot water pump 8, the heat storage liquid in the hot water storage tank 3 is pumped back and forth into the solar collector 1 and the air source heat pump unit 2, and then returns to the hot water storage pump 8. The solar collector 1 converts the solar radiation energy into heat energy, thereby heating the circulating heat storage liquid; the air source heat pump unit 2 is a heat pump unit with outdoor air as the heat source. During operation, the evaporator absorbs heat from the ambient heat energy in the air to evaporate the heat transfer medium. The pressure and temperature of the working medium vapor rise after being compressed by the compressor. When the high-temperature vapor passes through the special annular tube bonded to the outer surface of the water storage tank, the condenser condenses into liquid and transfers the heat to the heat storage liquid in the air source heat pump water storage tank, heating the heat storage liquid in the way of heat absorption and heat exchange. After absorbing the heat, the heat storage liquid flows back to the hot water storage tank 3, and then circulates in the geothermal coil 6 through the circulating water pump 9, so that the heat is introduced into the hot air type heat storage ground 5 and rises from the ground, thereby providing heat to the room and meeting the heat load requirements of farmers.

[0033] During the operation of the entire equipment, the control temperatures of the solar heat collection temperature sensor 13, the water temperature sensor 15, and the indoor air temperature sensor 16 need to be set according to different time periods, and the normal start and stop times of the solar heat collection pump 7, the hot water pump 8, and the circulating water pump 9 need to be set in the time controller 18 according to the usage requirements of farmers. For example, in the time periods from getting up in the morning to before 10:00 and at night, the temperature is low and the required heat load is large. At this time, the solar heat collection pump 7 and the hot water pump 8 can be started simultaneously, and two-stage heat exchange is performed to increase the storage heat of the thermal storage liquid; at noon, the solar radiation intensity is high and the required heat load indoors is small, so the solar heat collection pump 7 or the hot water pump 8 can be started alone. By utilizing the temperature controller 17 and the time controller 18 to control the operation of the solar heat collection pump 7, the hot water pump 8 and the circulating water pump 9 in two stages, the heat of the solar-air source heat pump coupled hot wind type thermal storage ground 5 is automatically operated according to the different heat loads required in different time periods, and two-stage heating is achieved. This solves the problems of frequent start and stop of water pumps or equipment, poor solar energy collection effect, mismatch between heat supply and farmers' heat load demand, and heat waste caused by fixed temperature control, ensures the normal operation of the system, reduces electricity consumption or operating costs, improves the solar energy guarantee rate, reduces the frequent start-up of the system, and improves the matching degree between the heat supply and farmers' heat load demand.

[0034] In a further embodiment of the present scheme, the solar radiation intensity sensor 14 and the solar thermal temperature sensor 13 are both electrically connected to the solar thermal pump 7, and the solar radiation intensity sensor 14 and the solar thermal temperature sensor 13 jointly control the operation of the solar thermal pump 7; the water temperature sensor 15 is electrically connected to the hot water pump 8 and the circulating water pump 9, so that the information monitored by each sensor is interconnected to improve the control accuracy of the start and stop and the operating status of the solar thermal pump 7, the hot water pump 8, and the circulating water pump 9 under different heat load demand conditions.

[0035] In a further embodiment of the present scheme, a heat exchange coil 4 is coiled in the hot water storage tank 3, and the water outlet of the heat exchange coil 4 is connected to the circulating water pump 9, and the water inlet is connected to the water outlet of the geothermal coil 6, so that the circulating liquid working medium in the heat exchange coil 4 and the geothermal coil 6 is isolated from the heat storage liquid in the hot water storage tank 3, that is, the interference of the solar heat collection pump 7 and the hot water pump 8 with the circulation of the heat storage liquid into the geothermal coil 6 when starting is avoided, so that the circulating liquid working medium flows more smoothly, and at the same time, the circulating liquid working medium is coated by the heat storage liquid in the heat exchange coil 4, so that the heat exchange is more uniform, and the heat loss when the heat storage liquid circulates directly is reduced.

[0036] In a further embodiment of the present scheme, a solar thermal temperature sensor 13 is installed in the connecting pipe between the solar thermal collector 1 and the hot water storage tank 3 and is close to the solar thermal collector 1, a water temperature sensor 15 is installed in the middle of the hot water storage tank 3, and an indoor air temperature sensor 16 is installed in the middle of the room 1.5 m from the ground. It can more accurately obtain the temperature of the heat storage liquid after heat exchange through the solar thermal collector 1 and the air source heat pump unit 2 and the indoor air temperature, so as to better adjust the start and close status and operating power of the solar thermal pump 7, the hot water pump 8, and the circulating water pump 9 to meet the heat load requirements under different indoor conditions.

[0037] In a further embodiment of the present solution, the solar thermal temperature sensor 13 is located in the water outlet pipe of the solar thermal collector 1 to more accurately obtain the temperature of the heat storage liquid after heat exchange by the solar heat exchanger.

[0038] In a further embodiment of the present scheme, a heat conduction cavity is provided in the hot air type heat storage floor 5 above the geothermal coil 6, and the heat conduction cavity is connected to two circulation pipes arranged at staggered intervals, and a first air valve 10 and a second air valve 11 are respectively provided in the two circulation pipes, and a fan 12 is provided in one of the circulation pipes; the liquid working medium circulating in the geothermal coil 6 transfers heat to the hot air type heat storage floor 5 and accumulates in the heat conduction cavity, and the indoor air is drawn into the heat conduction cavity by the fan 12, and after the air absorbs heat in the heat conduction cavity, it is again input into the room from another circulation pipe, thereby increasing the indoor temperature.

[0039] In a further embodiment of the present scheme, the first air valve 10, the second air valve 11 and the fan 12 are all electrically connected to the indoor air temperature sensor 16. According to the heat load requirements in different time periods, the opening and closing of the first air valve 10, the second air valve 11 and the fan 12 and the operating power of the fan 12 are automatically regulated. By controlling the circulation rate of the air, the purpose of controlling the indoor heat transfer efficiency is achieved to adapt to the heat load requirements of different rooms.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A control device for a rural solar-air source heat pump coupled hot air type heat storage ground, comprising a hot air type heat storage ground (5), wherein a geothermal coil (6) is laid in the hot air type heat storage ground (5), characterized in that: The geothermal coil (6) is connected to a heat storage tank (3) via a circulating water pump (9); the heat storage tank (3) is connected to a solar collector (1) and an air source heat pump unit (2) via a solar heat collection pump (7) and a hot water pump (8), respectively; a solar heat collection temperature sensor (13) is provided outside the solar heat collector (1); a water temperature sensor (15) is provided outside the heat storage tank (3); an indoor air temperature sensor (16) is provided above the hot air type heat storage floor (5); the solar heat collection pump (7) is electrically connected to a solar radiation intensity sensor (14); the solar heat collection temperature sensor (13), the solar radiation intensity sensor (14), the water temperature sensor (15), and the indoor air temperature sensor (16) are electrically connected to a temperature controller (17); and the solar heat collection pump (7), the hot water pump (8), and the circulating water pump (9) are electrically connected to a time controller (18).

2. A control device for a rural solar-air source heat pump coupled hot wind type heat storage ground according to claim 1, characterized in that: The solar radiation intensity sensor (14) and the solar heat collection temperature sensor (13) are both electrically connected to the solar heat collection pump (7), and the water temperature sensor (15) is electrically connected to the hot water pump (8) and the circulating water pump (9).

3. A control device for a rural solar-air source heat pump coupled hot wind type heat storage ground according to claim 1, characterized in that: A heat exchange coil (4) is coiled inside the heat storage tank (3), and the inlet and outlet of the heat exchange coil (4) are respectively connected to the inlet and outlet of the geothermal coil (6).

4. A control device for a rural solar-air source heat pump coupled hot wind type heat storage ground according to claim 3, characterized in that: The solar heat collection temperature sensor (13) is installed in the connecting pipe between the solar heat collector (1) and the hot water storage tank (3) and is located close to the solar heat collector (1). The water temperature sensor (15) is installed in the middle of the hot water storage tank (3). The indoor air temperature sensor (16) is installed 1.5 m away from the hot air type heat storage floor (5).

5. A control device for a rural solar-air source heat pump coupled hot wind type heat storage ground according to claim 4, characterized in that: The solar heat collection temperature sensor (13) is located in the water outlet pipeline of the solar heat collector (1).

6. A control device for a rural solar-air source heat pump coupled hot wind type heat storage ground according to claim 1, characterized in that: A heat transfer cavity is provided in the hot air type heat storage floor (5) above the geothermal coil (6), the heat transfer cavity being connected to two circulation pipes arranged at staggered intervals, both circulation pipes being provided with air valves, and one circulation pipe being provided with a fan (12).

7. A control device for a rural solar-air source heat pump coupled hot wind type heat storage ground according to claim 6, characterized in that: The two air valves and the fan (12) are both electrically connected to the indoor air temperature sensor (16).

Images