A multi-energy complementary based off-grid heating and refrigeration control system

Abstract

The utility model discloses a kind of off-grid type heating and refrigeration control systems based on multi-energy complement, which is mainly composed of control unit, sensing unit, energy supply unit, heat exchange and heat storage unit and end execution unit;Through the off-grid energy supply mode of multi-energy complement, on the one hand, it completely gets rid of the dependence on power grid, effectively avoids power grid failure, power-off and other problems, and with the peak-shaving regulation function of energy storage battery, it solves the problem of unstable energy supply caused by the intermittency of clean energy, further guarantees the continuous and stable operation of heating and refrigeration;On the other hand, wind power, photovoltaic and other clean energy replace traditional thermal power supply, without pollutant emission;At the same time, the low-cost characteristics of clean energy and the peak-shaving regulation function of energy storage battery reduce energy waste, significantly reduce system operation energy consumption and user use cost, and significantly improve economy.

Description

Technical Field

[0001] This utility model relates to the field of heating, ventilation, air conditioning and new energy application technology, specifically to an off-grid heating and cooling control system that integrates wind power, photovoltaic, solar thermal and energy storage for multi-energy complementarity. Background Technology

[0002] In current all-season heating (cooling) systems, the mode of relying solely on the power grid for power supply still dominates. However, it has significant shortcomings in terms of power supply reliability, energy efficiency, environmental protection, and economy, making it difficult to meet the demand for stable, low-carbon, and low-cost temperature control in both winter and summer.

[0003] From the perspective of power supply reliability, extreme weather in both winter and summer can lead to a surge in grid load, which can easily cause line overload and equipment failure, resulting in sudden power outages for heating (cooling) equipment. In order to alleviate grid pressure, some areas will also implement power rationing measures, and the power rationing time often overlaps with the peak demand for heating (cooling), such as the heating (cooling) period at night in winter and the cooling period in the afternoon in summer, directly interrupting the temperature control supply and affecting user comfort and life security. At the same time, the grid in remote areas fluctuates frequently, further weakening the stability of system operation and making it impossible to guarantee continuous temperature control.

[0004] In terms of energy consumption and environmental protection, traditional heating (cooling) relies heavily on thermal power, which has problems such as boiler heat loss and transmission loss in the power generation process, resulting in a high overall energy consumption coefficient. Moreover, the combustion of fossil fuels by thermal power plants emits carbon dioxide and sulfur dioxide, which not only exacerbates pollution during the winter heating (cooling) season, but also contradicts the low-carbon demand for green cooling in the summer, thus failing to meet the "dual carbon" goal.

[0005] Economically, both winter and summer are peak electricity consumption periods, and the proportion of electricity consumption in the high-price range is high under peak-valley electricity pricing, while traditional systems cannot flexibly stagger peak demand; at the same time, a single power supply mode cannot utilize low-cost clean energy sources such as photovoltaic and solar thermal energy as alternatives, resulting in high temperature control costs in both winter and summer, increasing the burden on users.

[0006] In summary, existing heating (cooling) systems with a single power supply mode have obvious shortcomings, and there is an urgent need for a new control system that integrates electricity, photovoltaics, solar thermal energy, and energy storage to overcome technical bottlenecks. Utility Model Content

[0007] The purpose of this invention is to provide an off-grid heating and cooling control system based on multi-energy complementarity to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] An off-grid heating and cooling control system based on multi-energy complementarity includes a control unit, a sensing unit, an energy supply unit, a heat exchange and storage unit, and a terminal execution unit.

[0010] The control unit includes: a host computer 1, a field controller 2, a remote control mobile phone 3, and an indoor control panel 19; the field controller 2 is connected to the host computer 1 via a network cable, and the field controller 2 and the indoor control panel 19 communicate bidirectionally (e.g., RS485 protocol); the remote control mobile phone 3 communicates wirelessly with the host computer 1 (e.g., 5G); the indoor control panel 19 can realize local heating / cooling mode switching and temperature setpoint adjustment, while the field controller 2 is responsible for executing control commands and feeding back the equipment status;

[0011] Among them, the control host 1 is the core control center, used to receive sensing data, issue control commands and monitor the operating status of equipment;

[0012] The remote control mobile phone 3 supports remote real-time viewing of system operating conditions (such as equipment operating status and temperature and liquid level data) and issuing control commands; at the same time, the control host 1, the field controller 2, and the remote control mobile phone 3 all have parameter setting functions, which can configure the control parameters of the energy supply unit (such as the minimum charge of the energy storage battery) and the heat exchange and heat storage unit (such as the set temperature of the water tank).

[0013] The sensing unit includes: a water tank temperature sensor 4, a water tank level sensor 5, and an indoor / outdoor temperature sensor 6. The water tank temperature sensor 4 is installed inside the domestic water tank 15 and the energy storage tank 17, respectively, to monitor the water temperature of the two tanks. The output of the water tank temperature sensor 4 is electrically connected to the input of the field controller 2. The water tank level sensor 5 is installed at the bottom of the domestic water tank 15 and the energy storage tank 17, respectively, to collect the water level data of the two tanks. The output of the water tank level sensor 5 is electrically connected to the input of the field controller 2. The indoor / outdoor temperature sensor 6 is installed in the indoor activity area and the outdoor open area, respectively, to obtain environmental and indoor temperature control parameters. The output of the indoor / outdoor temperature sensor 6 is electrically connected to the input of the field controller 2. All sensing data is aggregated by the field controller 2 and transmitted to the control host 1 in real time to provide a basis for control decisions.

[0014] The energy supply unit includes: photovoltaic modules 8, wind turbines 9, inverters 10, energy storage batteries 11, electrical equipment 12, and a field distribution cabinet 13. The photovoltaic modules 8 and wind turbines 9 are energy input sources. The output terminals of both photovoltaic modules 8 and wind turbines 9 are electrically connected to the input terminal of the inverter 10, converting DC to AC power to form a completely off-grid energy supply. The field controller 2 is electrically connected to the inverter 10, energy storage batteries 11, and the field distribution cabinet 13, responsible for controlling and distributing the generated electricity, and is configured with a "priority protection logic for energy storage batteries." The output terminal of the energy storage battery 11 is electrically connected to the input terminal of the field distribution cabinet 13. The electricity generated by the photovoltaic modules 8 and wind turbines 9 is prioritized for charging the energy storage battery 11 until a preset minimum storage capacity is reached, meaning this capacity must meet the user's normal living, production, and basic temperature control electricity needs under the most unfavorable conditions. The energy storage battery 11 is the core off-grid energy storage component, which has the functions of peak regulation and emergency power supply, and is used to supplement power supply when the supply of clean energy is insufficient or interrupted; the on-site power distribution cabinet 13 is the power distribution hub, and its output end is electrically connected to the air source heat pump 16, the solenoid valve 7, the other electrical equipment 12 and the control unit, respectively. It is responsible for power distribution, overload protection and circuit safety management, and ensures the stable power supply of each device under off-grid conditions.

[0015] The heat exchange and storage unit includes: a solar vacuum tube 14, a domestic water tank 15, an air source heat pump 16, an energy storage tank 17, and a solenoid valve 7. The solar vacuum tube 14 is connected in series with the domestic water tank 15 through a circulating water pipeline to absorb solar heat and transfer it to the water tank for storage, serving as a supplementary source of heat energy. A solenoid valve 7 is installed on the circulating water pipeline and is electrically connected to a field controller 2, which controls its on / off state. The input terminal of the air source heat pump 16 is electrically connected to the output terminal of the field distribution cabinet 13 and is directly controlled by the field controller 2, including start / stop and switching between heating and cooling modes. The output terminal of the air source heat pump 16 is connected to the domestic water tank 15 and the energy storage tank 17 through fluid pipelines. A solenoid valve 7 is installed on the fluid pipelines and is controlled by the field controller 2 to switch between hot and cold water delivery paths. The domestic water tank 15 stores daily hot water, and the energy storage tank 17 is the core heat / cold storage component for off-grid temperature control, used to store heating / cold water. The energy required for cooling is connected to the air source heat pump 16 through pipelines; at the same time, the operating status signals of the air source heat pump 16 (such as start / stop status, mode status) and the on / off signals of the solenoid valve (7) are fed back to the field controller (2) in real time.

[0016] The terminal execution unit includes: heating and cooling terminals 18, such as underfloor heating coils and fan coil units. The heating and cooling terminals 18 are connected to the output end of the air source heat pump 16 and the energy storage tank 17 respectively through fluid pipelines. The pipelines are equipped with solenoid valves 7, which are controlled by the field controller 2 to open and close, so as to realize the output of heat energy or cold energy and ensure the indoor temperature control requirements under off-grid conditions.

[0017] The on-site power distribution cabinet 13 is the power distribution hub. Its output terminals are electrically connected to the air source heat pump 16, the solenoid valve 7, the electrical equipment 12 and the control unit, respectively. It is responsible for power distribution, overload protection and circuit safety management, and ensures stable power supply to each device under off-grid conditions.

[0018] Preferably, the control host 1, the field controller 2, and the remote control mobile phone 3 all have parameter setting functions.

[0019] Preferably, the electrical energy generated by the photovoltaic module 8 and the wind turbine 9 is preferentially supplied to the energy storage battery 11 for charging until the preset minimum storage capacity is reached.

[0020] Preferably, the energy storage battery 11 is an off-grid core energy storage component, which has the functions of peak-shaving regulation and emergency power supply.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This invention utilizes a multi-energy complementary off-grid energy supply mode. On one hand, it completely eliminates dependence on the power grid, effectively avoiding problems such as grid failures and power rationing. Furthermore, by leveraging the peak-shaving and regulation function of energy storage batteries, it addresses the instability in energy supply caused by the intermittency of clean energy, further ensuring the continuous and stable operation of heating and cooling. On the other hand, it replaces traditional thermal power with clean energy sources such as wind and solar power, resulting in zero pollutant emissions. Simultaneously, the low cost of clean energy and the peak-shaving and regulation function of energy storage batteries reduce energy waste, significantly lowering system operating energy consumption and user costs, thus significantly improving economic efficiency. Attached Figure Description

[0023] Figure 1 This is the circuit connection diagram of this utility model.

[0024] In the diagram: Control host—1, Field controller—2, Remote control mobile phone—3, Water tank temperature sensor—4, Water tank level sensor—5, Indoor and outdoor temperature sensor—6, Solenoid valve—7, Photovoltaic module—8, Wind turbine generator—9, Inverter—10, Energy storage battery—11, Electrical equipment—12, Field distribution cabinet—13, Solar vacuum tube—14, Domestic water tank—15, Air source heat pump—16, Energy storage water tank—17, Heating and cooling terminal—18, Indoor control panel—19. Detailed Implementation

[0025] The working principle of this utility model will now be clearly and completely described with reference to the accompanying drawings of the embodiments thereof:

[0026] 1. During periods of sufficient clean energy supply (such as when sunlight is strong and wind is stable during the day).

[0027] (1) Power distribution: The power generated by the photovoltaic module 8 and the wind turbine 9 is converted by the inverter 10 and then used to charge the energy storage battery 11 until the preset minimum storage capacity is reached to ensure basic power safety.

[0028] (2) Temperature control priority: When the energy storage battery 11 has a power greater than the minimum storage power, clean energy is directly supplied to the air source heat pump 16 through the on-site power distribution cabinet 13. The on-site controller 2 controls the operation of the air source heat pump 16 according to the mode (heating / cooling) and temperature value set by the indoor control panel 19 or the remote control mobile phone 3. Heating mode: The air source heat pump 16 outputs hot water, and the field controller 2 opens the corresponding solenoid valve 7. The hot water is transported to the heating and cooling terminals 18 through pipelines. When the indoor temperature reaches the set value, the solenoid valve 7 is switched, and the hot water is transported to the energy storage tank 17 for storage. When the energy storage tank 17 reaches the set temperature, the solenoid valve 7 is switched again, and the hot water is transported to the domestic water tank 15. At the same time, the circulation pipeline solenoid valve 7 of the solar vacuum tube 14 is opened, and the solar vacuum tube 14 assists in heating to improve energy utilization efficiency. Cooling mode: The air source heat pump 16 outputs cold water, and the field controller 2 opens the corresponding solenoid valve 7. The cold water is transported to the heating and cooling terminals 18. After the indoor temperature reaches the standard, the solenoid valve 7 is switched, and the cold water is transported to the energy storage tank 17 for cold storage.

[0029] Surplus handling: When the domestic water tank 15 reaches the set temperature in heating mode, or the energy storage tank 17 reaches the set temperature in cooling mode, the clean energy will no longer supply the air source heat pump 16, but will continue to charge the energy storage battery 11; when the energy storage battery 11 is fully charged, the field controller 2 issues a wind curtailment and solar curtailment command to the inverter 10, and the inverter 10 executes the command to stop receiving power input from the photovoltaic module 8 and the wind turbine 9 to avoid overcharging and damage to the energy storage battery.

[0030] II. Periods when clean energy supply is insufficient or interrupted (such as nighttime periods without sunlight or wind).

[0031] (1) Energy storage and replenishment: Under the premise of ensuring the minimum power of the energy storage battery 11, when the power load increases sharply during peak heating / cooling demand (such as winter nights and summer afternoons), or when the supply of clean energy is interrupted, the field controller 2 controls the energy storage battery 11 to release the stored electrical energy, which is then distributed to the air source heat pump 16, solenoid valve 7 and other equipment through the field distribution cabinet 13 to replenish the energy supply gap and ensure that the temperature control is not interrupted.

[0032] (2) Heat storage / cold storage release: When there is no clean energy input, if the indoor temperature is lower than / higher than the set value, the field controller 2 opens the solenoid valve 7 between the energy storage tank 17 and the heating and cooling terminal 18, and the energy storage tank 17 releases the stored heat / cold energy, which is transported to the terminal through the pipeline to maintain the indoor temperature stability and reduce the power consumption of the energy storage battery.

[0033] III. Multi-terminal control and status monitoring process

[0034] (1) Local control: The user sends commands such as heating / cooling mode and temperature set value to the field controller 2 through the indoor control panel 19. After receiving the commands, the field controller 2 controls the air source heat pump 16 and the solenoid valve 7 to operate, and feeds back the indoor temperature to the indoor control panel 19 for display, which is adapted to the local real-time operation needs.

[0035] (2) Remote control: The user sends a remote control signal to the control host 1 through the remote control mobile phone 3. The control host 1 transmits the instruction to the field controller 2, and the field controller 2 executes the control action. At the same time, the control host 1 collects the equipment operating status (such as clean energy power generation, energy storage battery power, water tank temperature and level) uploaded by the field controller 2 in real time, and pushes it to the remote control mobile phone 3 to realize remote monitoring and control in off-grid scenarios.

[0036] (3) Parameter settings: Users can set the control parameters of energy supply units (such as the minimum storage capacity of energy storage batteries, the trigger threshold for wind and solar curtailment) and heat exchange and storage units (such as the set temperature of domestic water tanks / energy storage tanks, and the start-up temperature difference of solar collectors) through the control host 1, field controller 2 or remote control mobile phone 3, to adapt to off-grid usage scenarios with different seasons and different power loads. Example

[0037] An off-grid heating and cooling control system based on multi-energy complementarity is disclosed. The system mainly consists of a control unit, a sensing unit, an energy supply unit, a heat exchange and storage unit, and a terminal execution unit. Specifically, it includes: a control host 1, a field controller 2, a remote control mobile phone 3, a water tank temperature sensor 4, a water tank level sensor 5, an indoor and outdoor temperature sensor 6, a solenoid valve 7, a photovoltaic module 8, a wind turbine generator 9, an inverter 10, an energy storage battery 11, other electrical equipment 12, a field distribution cabinet 13, a solar vacuum tube 14, a domestic water tank 15, an air source heat pump 16, an energy storage water tank 17, heating and cooling terminals 18, and an indoor control panel 19.

[0038] The electricity generated by photovoltaic modules 8 and wind turbine 9 is converted by inverter 10 and prioritized to charge energy storage battery 11 until the preset minimum storage capacity is reached, ensuring basic power safety. When the energy storage battery 11 has a capacity greater than the minimum storage capacity, clean energy is directly supplied to air source heat pump 16 via on-site distribution cabinet 13. On-site controller 2 controls the operation of air source heat pump 16 according to the heating / cooling mode and temperature value set by indoor control panel 19 or remote control mobile phone 3: when air source heat pump 16 outputs hot water, on-site controller 2 opens the corresponding solenoid valve 7, and the hot water is transported to heating and cooling terminals 18 through pipelines; when the indoor temperature reaches the set value, solenoid valve 7 is switched, and hot water is transported to energy storage tank 17 for storage; when energy storage tank 17 reaches the set temperature, solenoid valve 7 is switched again, and hot water is transported to domestic water tank 15, while the circulation pipeline solenoid valve 7 of solar vacuum tube 14 is opened, and solar vacuum tube 14 assists in heating, improving energy utilization efficiency; when air source heat pump 16 outputs cold water, on-site controller 2 opens the corresponding solenoid valve 7. According to the solenoid valve 7, cold water is delivered to the heating and cooling terminal 18; after the indoor temperature reaches the standard, the solenoid valve 7 is switched, and cold water is delivered to the energy storage tank 17 for cold storage; when the domestic water tank 15 reaches the set temperature in the heating mode, or the energy storage tank 17 reaches the set temperature in the cooling mode, the clean energy no longer supplies the air source heat pump 16, but continues to charge the energy storage battery 11; when the energy storage battery 11 is fully charged, the field controller 2 issues a wind curtailment and solar curtailment command to the inverter 10, and the inverter 10 executes the command to stop receiving power input from the photovoltaic module 8 and the wind turbine 9 to avoid overcharging and damage to the energy storage battery.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An off-grid heating and cooling control system based on multi-energy complementarity, characterized in that: It includes a control unit, a sensing unit, an energy supply unit, a heat exchange and storage unit, and a terminal execution unit; The control unit includes: a control host (1), a field controller (2), a remote control mobile phone (3), and an indoor control panel (19); the field controller (2) is connected to the control host (1) via a network cable, and the field controller (2) communicates bidirectionally with the indoor control panel (19); the remote control mobile phone (3) communicates wirelessly with the control host (1); The sensing unit includes: a water tank temperature sensor (4), a water tank level sensor (5), and an indoor / outdoor temperature sensor (6); the water tank temperature sensor (4) is installed inside the domestic water tank (15) and the energy storage tank (17) respectively; the output of the water tank temperature sensor (4) is electrically connected to the input of the field controller (2); the water tank level sensor (5) is installed at the bottom of the domestic water tank (15) and the energy storage tank (17) respectively, and the output of the water tank level sensor (5) is electrically connected to the input of the field controller (2); the indoor / outdoor temperature sensor (6) is installed in the indoor activity area and the outdoor open area respectively; the output of the indoor / outdoor temperature sensor (6) is electrically connected to the input of the field controller (2); The energy supply unit includes: photovoltaic modules (8), wind turbines (9), inverters (10), energy storage batteries (11), electrical equipment (12), and field distribution cabinets (13); the photovoltaic modules (8) and wind turbines (9) are energy input sources, and the output terminals of the photovoltaic modules (8) and wind turbines (9) are electrically connected to the input terminal of the inverter (10). The inverter (10) completes the conversion of DC to AC to form a completely off-grid energy supply; the field controller (2) is electrically connected to the inverter (10), the energy storage battery (11), and the field distribution cabinet (13), and is responsible for controlling and distributing the generated electrical energy, and sets the "energy storage battery priority protection logic"; the output terminal of the energy storage battery (11) is electrically connected to the input terminal of the field distribution cabinet (13); The heat exchange and storage unit includes: a solar vacuum tube (14), a domestic water tank (15), an air source heat pump (16), an energy storage tank (17), and a solenoid valve (7); the solar vacuum tube (14) is connected in series with the domestic water tank (15) through a circulating water pipeline, and a solenoid valve (7) is provided on the circulating water pipeline. The solenoid valve (7) is electrically connected to the field controller (2) and is controlled by the field controller (2) to open and close; the input end of the air source heat pump (16) is electrically connected to the output end of the field distribution cabinet (13) and is directly controlled by the field controller (2). The output end of the air source heat pump (16) is connected to the domestic water tank (15) and the energy storage tank (17) through a fluid pipeline, and a solenoid valve (7) is provided on the fluid pipeline. The solenoid valve (7) is controlled by the field controller (2); the operating status signal of the air source heat pump (16) and the on / off signal of the solenoid valve (7) are fed back to the field controller (2) in real time. The terminal execution unit includes a heating and cooling terminal (18), which is connected to the output end of the air source heat pump (16) and the energy storage tank (17) respectively through fluid pipelines. The pipeline is equipped with a solenoid valve (7), which is controlled by the field controller (2) to open and close the solenoid valve (7) to realize the output of heat energy or cold energy. The field distribution cabinet (13) is the power distribution center. Its output end is electrically connected to the air source heat pump (16), solenoid valve (7), electrical equipment (12) and control unit, respectively. It is responsible for power distribution, overload protection and circuit safety management to ensure stable power supply to each device under off-grid conditions.

2. The off-grid heating and cooling control system based on multi-energy complementarity according to claim 1, characterized in that, The control host (1), field controller (2), and remote control mobile phone (3) all have parameter setting functions.

3. The off-grid heating and cooling control system based on multi-energy complementarity according to claim 1, characterized in that, The electricity generated by the photovoltaic module (8) and the wind turbine (9) is preferentially supplied to the energy storage battery (11) for charging until the preset minimum storage capacity is reached.

4. The off-grid heating and cooling control system based on multi-energy complementarity according to claim 1, characterized in that, The energy storage battery (11) is an off-grid core energy storage component, which has the functions of peak-shaving regulation and emergency power supply.

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