Active and passive solar energy coupled heating system

Abstract

The application discloses an active solar energy and passive solar energy coupled heating system, and relates to the technical field of energy utilization.The system comprises a controller, a heating room, a floor coil pipe arranged on the ground of the heating room, a solar energy collector arranged on the roof of the heating room, a low-temperature air source heat pump heating unit arranged outside the heating room, a heat pump heat storage water tank arranged inside the heating room, and a sunlight room arranged on the south of the heating room.The solar energy collector comprises a solar energy heat storage water tank.The active solar energy and passive solar energy coupled heating system comprises a room temperature control mode.When the active solar energy and passive solar energy coupled heating system operates in the room temperature control mode, the controller is used for controlling the operation of the low-temperature air source heat pump heating unit according to the water temperature in the heat pump heat storage water tank, and controlling the operation of the solar energy collector and the heat pump heat storage water tank according to the room temperature of the heating room.The application can improve the stability of the solar energy heating system.

Description

Technical Field

[0001] This invention relates to the field of energy utilization technology, and in particular to an active solar and passive solar coupled heating system. Background Technology

[0002] With the acceleration of China's industrialization and urbanization, and the improvement of people's living standards, building energy consumption has increased rapidly. In winter, two-thirds of the energy consumption is used for building heating and hot water supply. Utilizing solar energy for heating is an important way to achieve building energy conservation. China is rich in solar energy resources, with more than two-thirds of its regions receiving annual solar irradiance exceeding 5000 MJ / m². 2 It possesses favorable natural conditions for utilizing solar energy. Solar energy resources have advantages such as a wide range of exploitable resources, no environmental pollution, convenient access, and strong sustainability. However, their utilization is subject to instability and discontinuity due to time and weather factors. Summary of the Invention

[0003] The purpose of this invention is to provide a combined active and passive solar heating system to improve the stability of solar heating systems.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] An active and passive solar coupled heating system includes: a controller, a heated room, floor coils laid on the floor of the heated room, a solar collector installed on the roof of the heated room, a low-temperature air source heat pump heating unit installed outside the heated room, a heat pump hot water storage tank installed inside the heated room, and a sunroom located on the south side of the heated room; the solar collector includes a solar hot water storage tank.

[0006] The outlet of the solar hot water storage tank is connected to the inlet of the floor coil, the outlet of the floor coil is connected to the inlet of the solar hot water storage tank, the first outlet of the heat pump hot water storage tank is connected to the inlet of the floor coil, the first return outlet of the heat pump hot water storage tank is connected to the outlet of the floor coil, the second outlet of the heat pump hot water storage tank is connected to the inlet of the low-temperature air source heat pump heating unit, and the second return outlet of the heat pump hot water storage tank is connected to the outlet of the low-temperature air source heat pump heating unit.

[0007] The active and passive solar coupled heating system includes a room temperature control mode. When the active and passive solar coupled heating system is operating in the room temperature control mode, the controller is used to:

[0008] The operation of the low-temperature air source heat pump heating unit is controlled according to the water temperature in the heat pump storage tank.

[0009] The operation of the solar collector and the heat pump hot water storage tank is controlled according to the room temperature of the heated room.

[0010] Optionally, in controlling the operation of the low-temperature air source heat pump heating unit based on the water temperature in the heat pump storage tank, the controller is specifically used for:

[0011] When the water temperature in the heat pump storage tank is lower than the first set lower limit temperature, the low-temperature air source heat pump heating unit is started until the temperature in the heat pump storage tank is higher than the first set upper limit temperature, at which point the low-temperature air source heat pump heating unit is stopped.

[0012] Optionally, a first solenoid valve is installed on the water supply pipe at the outlet of the solar hot water storage tank, and a second solenoid valve is installed on the water supply pipe at the inlet of the solar hot water storage tank; a third solenoid valve is installed on the water supply pipe at the first outlet, and a fourth solenoid valve is installed on the water supply pipe at the first return outlet; a solar return water pump is installed on the water supply pipe between the outlet of the floor coil and the second solenoid valve; and a hot water storage tank water supply pump is installed between the inlet of the floor coil and the third solenoid valve.

[0013] Optionally, in controlling the operation of the solar collector and the heat pump hot water storage tank according to the room temperature of the heated room, the controller is specifically used for:

[0014] When the room temperature of the heated room is lower than the set lower limit, it is determined whether the water temperature in the solar hot water storage tank is higher than the set upper limit of the solar collector.

[0015] If the water temperature in the solar hot water storage tank is higher than the set upper limit of the solar collector, then the first solenoid valve and the second solenoid valve are opened, the third solenoid valve and the fourth solenoid valve are closed, the solar return water pump is turned on, and the hot water storage tank supply water pump is turned off until the room temperature is higher than the set upper limit of the room temperature.

[0016] If the water temperature in the solar hot water storage tank is lower than the set lower limit of the solar collector, determine whether the water temperature in the heat pump hot water storage tank is greater than the second set upper limit temperature.

[0017] If the water temperature in the heat pump storage tank is higher than the second set upper limit temperature, then the third and fourth solenoid valves are opened, the first and second solenoid valves are closed, the water supply pump of the storage tank is turned on, and the solar return water pump is turned off until the room temperature is higher than the set upper limit of room temperature.

[0018] When the room temperature of the heated room is higher than the set upper limit, the solar return water pump, the hot water storage tank supply water pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are shut down.

[0019] Optionally, a heat tracing cable is installed on the water inlet pipe of the solar hot water storage tank;

[0020] The controller is also used for:

[0021] When the water temperature at the inlet of the solar hot water storage tank is lower than the third set lower limit temperature, the heating tape is turned on until the water temperature at the inlet of the solar hot water storage tank is higher than the third set lower limit temperature, at which point the heating tape is turned off.

[0022] Optionally, the active and passive solar coupled heating system includes a time + room temperature control mode. When the active and passive solar coupled heating system is operating in the time + room temperature control mode, the controller is used to:

[0023] When the time is within the first set time period, if the water temperature of the heat pump storage tank is lower than the fourth set lower limit temperature, the low-temperature air source heat pump heating unit will be started until the water temperature of the heat pump storage tank is higher than the third set upper limit temperature; when the time is not within the first set time period, the low-temperature air source heat pump heating unit will stop operating; the first set time period is 12:00-18:00.

[0024] Optionally, the active and passive solar coupled heating system includes a time + room temperature control mode. When the active and passive solar coupled heating system is operating in the time + room temperature control mode, the controller is further configured to:

[0025] When the room temperature is lower than the set lower limit and the time is within the second set time period, the third and fourth solenoid valves are opened, the first and second solenoid valves are closed, the hot water tank water supply pump is turned on, and the solar return water pump is turned off until the room temperature is higher than the set upper limit; the second set time period is 6:00-18:00.

[0026] When the room temperature is lower than the set lower limit and the time is within the third set time period, if the water temperature in the solar hot water storage tank is higher than the set upper limit of the solar collector, then the first and second solenoid valves are opened, the third and fourth solenoid valves are closed, the solar return water pump is turned on, and the hot water storage tank supply water pump is turned off, until the room temperature is higher than the set upper limit; the third set time period is 18:00-6:00.

[0027] When the room temperature is higher than the set upper limit, the solar water return pump, the hot water storage tank water supply pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are shut down.

[0028] Optionally, it also includes a water replenishment device, which is connected to the second solenoid valve via a check valve.

[0029] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0030] This invention uses a combination of passive sunroom and active solar heating to provide a heat source for floor heating coils, which improves the stability of room temperature and maximizes the utilization of solar energy. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of an active and passive solar coupled heating system provided in this embodiment of the invention. Figure 1 ;

[0033] Figure 2 A schematic diagram of an active and passive solar coupled heating system provided in this embodiment of the invention. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the workflow in the room temperature control mode provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the workflow in the time + room temperature control mode provided in an embodiment of the present invention.

[0036] Symbol explanation:

[0037] 1-Solar collector; 2-First solenoid valve; 4-Second solenoid valve; 16-Third solenoid valve; 18-Fourth solenoid valve; 3-Solar water tank temperature probe; 5-Check valve; 6-Water supply valve; 7-First water pump valve; 9-Second water pump valve; 13-Third water pump valve; 15-Fourth water pump valve; 8-Solar return water pump; 10-Floor outlet valve; 11-Floor inlet valve; 12-Floor coil; 14-Hot water storage tank supply pump; 17-Heat pump hot water storage tank temperature probe; 19-Heat pump supply valve ; 20-Heat pump hot water storage tank; 21-Heat pump return water valve; 22-Controller; 23-Solar collector heating signal line; 24-Solar collector temperature signal line; 25-Heat tracing cable working signal line; 26-Heat tracing cable temperature signal line; 27-Auxiliary heat source heating signal line; 28-Water storage tank temperature signal line; 29-Heat pump working signal line; 30-Heat tracing cable; 31-Heat tracing cable temperature probe; 32-Indoor temperature probe; 33-Indoor temperature signal line; 34-Low temperature air source heat pump heating unit; 35-Sunroom. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The purpose of this invention is to provide a combined active and passive solar heating system to improve the stability of solar heating systems.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] like Figure 1 and Figure 2 As shown, this embodiment discloses an active and passive solar coupled heating system, including: a controller 22, a heating room, floor coils 12 laid on the floor of the heating room, a solar collector 1 installed on the roof of the heating room, a low-temperature air source heat pump heating unit 34 installed outside the heating room, a heat pump hot water storage tank 20 installed inside the heating room, and a sunroom 35 located to the south of the heating room; the solar collector 1 includes a solar hot water storage tank.

[0043] The outlet of the solar water storage tank is connected to the inlet of the floor coil 12, the outlet of the floor coil 12 is connected to the inlet of the solar water storage tank, the first outlet of the heat pump water storage tank 20 is connected to the inlet of the floor coil 12, the first return outlet of the heat pump water storage tank 20 is connected to the outlet of the floor coil 12, the second outlet of the heat pump water storage tank 20 is connected to the inlet of the low-temperature air source heat pump heating unit 34, and the second return outlet of the heat pump water storage tank 20 is connected to the outlet of the low-temperature air source heat pump heating unit 34.

[0044] A first solenoid valve 2 is installed on the water supply pipe at the outlet of the solar hot water storage tank, and a second solenoid valve 4 is installed on the water supply pipe at the inlet of the solar hot water storage tank; a third solenoid valve 16 is installed on the water supply pipe at the first outlet, and a fourth solenoid valve 18 is installed on the water supply pipe at the first return outlet; a solar return water pump 8 is installed on the water supply pipe between the outlet of the floor coil 12 and the second solenoid valve 4; and a hot water storage tank water supply pump 14 is installed between the inlet of the floor coil 12 and the third solenoid valve 16.

[0045] As a specific implementation method: the outlet of the solar hot water storage tank is connected in sequence through the first solenoid valve 2, the floor inlet valve 11, the floor coil 12, the floor outlet valve 10, the second water pump valve 9, the solar return water pump 8, the second water pump valve 9, the check valve 5, and the second solenoid valve 4, and then connected to the inlet of the solar hot water storage tank.

[0046] The heat pump hot water storage tank 20 is equipped with a temperature probe 17 inside and two outlets (first outlet and second outlet), two return outlets (first return outlet and second return outlet) and one drain outlet on the outside. The first outlet at the top is connected to the third solenoid valve 16, the fourth water pump valve 15, the hot water storage tank water supply pump 14, and the third water pump valve 13 in sequence through a pipe, and then connected to the pipeline between the first solenoid valve 2 and the floor inlet valve 11. The first return outlet at the bottom of the heat pump hot water storage tank 20 is connected to the fourth solenoid valve 18 through a pipe, and then connected to the pipeline between the second water pump valve 9 and the floor outlet valve 10. The second outlet at the bottom of the heat pump hot water storage tank 20 is connected to the heat pump return valve 21, the low-temperature air source heat pump heating unit 34, and the heat pump water supply valve 19 in sequence through a pipe, and then connected to the second return outlet at the top of the heat pump in the hot water storage tank.

[0047] The active and passive solar coupled heating system of the present invention also includes a water replenishment device, which is connected to the second solenoid valve 4 via a check valve 5. The water replenishment device includes a water replenishment pipeline and a water replenishment valve 6. The water replenishment pipeline is located between the first water pump valve 7 and the check valve 5, and is connected to the water replenishment valve 6. The water replenishment device is used for replenishing water in the active and passive solar coupled heating system.

[0048] The outdoor pipes of the solar water storage tank are wrapped with a 30mm heat tracing cable.

[0049] The first solenoid valve 2, the second solenoid valve 4, the solar return water pump 8 are connected to the controller 22 via the solar collector heating signal line 23, the solar water tank temperature probe 3 is connected to the solar collector temperature signal line 24, the heating cable 30 is connected to the heating cable working signal line 25, the heating cable temperature probe 31 is connected to the heating cable temperature signal line 26, the third solenoid valve 16, the fourth solenoid valve 18, the hot water storage tank supply water pump 14 is connected to the auxiliary heat source heating signal line 27, the heat pump hot water storage tank 20 temperature probe 17 is connected to the storage tank temperature signal line 28, the low temperature air source heat pump heating unit 34 is connected to the heat pump working signal line 29, and the indoor temperature probe 32 is connected to the indoor temperature signal line 33.

[0050] The present invention discloses an active and passive solar coupled heating system, which includes a solar collector heating circuit, an auxiliary heat source heating circuit, a heat tracing cable 30 antifreeze circuit, and a control system.

[0051] The solar thermal heating circuit consists of a solar collector 1, a first solenoid valve 2, a second solenoid valve 4, a check valve 5, a first water pump valve 7, a second water pump valve 9, a solar return water pump 8, a floor outlet valve 10, a floor inlet valve 11, and a floor coil 12. The working process of the solar thermal heating circuit is as follows: when the first solenoid valve 2, the second solenoid valve 4, the floor outlet valve 10, the floor inlet valve 11, the first water pump valve 7, the second water pump valve 9, and the solar return water pump 8 are in the open state, the solar collector 1 converts the acquired solar energy into heat energy and stores it in the solar hot water storage tank. The hot water returns to the solar collector 1 through the first solenoid valve 2, the floor inlet valve 11, the floor coil 12, the floor outlet valve 10, the second water pump valve 9, the solar return water pump 8, the first water pump valve 7, the check valve 5, and the second solenoid valve 4.

[0052] The auxiliary heat source heating circuit consists of a heat pump water storage tank, a third solenoid valve 16, a fourth solenoid valve 18, a third water pump valve 13, a fourth water pump valve 15, a water pump supplying water to the water storage tank, a floor outlet valve 10, a floor inlet valve 11, and floor coils 12. The operation of the auxiliary heat source heating circuit is as follows: floor outlet valve 10, floor inlet valve 11, third water pump valve 13, fourth water pump valve 15, water pump supplying water to the water storage tank, third solenoid valve 16, fourth solenoid valve 18, heat pump... With the pump supply valve 19 and heat pump return valve 21 in the open state, the hot water generated by the heat pump enters the heat pump storage tank through the heat pump supply valve 19 and flows back to the heat pump through the heat pump return valve 21, storing the heat generated by the heat pump in the heat pump storage tank. The hot water in the heat pump storage tank returns to the heat pump storage tank through the third solenoid valve 16, the fourth water pump valve 15, the storage tank supply pump, the third water pump valve 13, the floor inlet valve 11, the floor coil 12, the floor outlet valve 10, and the fourth solenoid valve 18.

[0053] The antifreeze circuit of the heating cable 30 consists of the heating cable 30. The working process of the antifreeze circuit of the heating cable 30 is as follows: the heating cable 30 is installed on the outdoor pipe of the solar thermal heating circuit and is controlled by the controller 22 in a constant temperature heating mode.

[0054] The control system consists of a solar water tank temperature probe 3, a heat pump storage tank temperature probe, a controller 22, a heating signal from the solar collector 1, a temperature signal from the solar collector 1, a working signal from the heating cable 30, a temperature signal from the heating cable 30, a heating signal from the auxiliary heat source, a storage tank temperature signal, a heat pump working signal, and the heating cable temperature probe 31. The control system operates as follows: the solar water tank temperature probe 3 converts the water temperature into a temperature signal from the solar collector 1 and transmits it to the controller 22; the controller 22 outputs a heating signal from the solar collector 1; the heat pump storage tank temperature probe converts the water temperature into a storage tank temperature signal and transmits it to the controller. 22. Controller 22 outputs heat pump working signal and auxiliary heat source heating signal; the temperature probe 31 of the heat tracing cable converts the temperature into a temperature signal of the heat tracing cable 30 and transmits it to controller 22, and controller 22 outputs heat tracing cable 30 working signal; the indoor temperature probe 32 converts the room temperature into a room temperature signal and transmits it to controller 22, and controller 22 outputs solar collector 1 heating signal, heat pump working signal, auxiliary heat source heating signal, and heat tracing cable 30 working signal by analyzing the temperature signal of solar collector 1, water tank temperature signal, and heat tracing cable 30, and the solar collector 1 heating signal and auxiliary heat source heating signal cannot be output simultaneously.

[0055] The present invention provides an active and passive solar coupled heating system, including a room temperature control mode and a time + room temperature control mode.

[0056] (1) As Figure 3As shown, when the active and passive solar coupled heating system is operating in room temperature control mode, the controller 22 is used to:

[0057] The operation of the low-temperature air source heat pump heating unit 34 is controlled according to the water temperature in the heat pump storage tank 20; the operation of the solar collector 1 and the heat pump storage tank 20 is controlled according to the room temperature of the heated room.

[0058] i) In controlling the operation of the low-temperature air source heat pump heating unit 34 based on the water temperature in the heat pump storage tank 20, the controller 22 is specifically used for:

[0059] When the water temperature T in the heat pump storage tank 20 W Temperature below the first set lower limit T nL At that time, the low-temperature air source heat pump heating unit 34 is started until the temperature T in the heat pump storage tank 20 is reached. W Temperature above the first set upper limit T nH When the low-temperature air source heat pump heating unit 34 is stopped, the water intake temperature of the heat pump storage tank 20 is always maintained at the set lower limit temperature T. L and set upper limit temperature T H Between these, during the operation of the heat pump, its operation mode is controlled by its own built-in control system.

[0060] ii) The room temperature T in the heated room R The operation of the solar water return pump 8 and the hot water storage tank supply pump 14 is controlled based on the standard.

[0061] iii) In controlling the operation of the solar collector 1 and the heat pump hot water storage tank 20 according to the room temperature of the heated room, the controller 22 is specifically used for:

[0062] When the room temperature T of the heated room R Below the set room temperature lower limit T SL At that time, determine the water temperature T inside the solar water storage tank. i Is the temperature higher than the set upper limit T of the solar collector 1? tH ;

[0063] If the water temperature T in the solar water storage tank i The temperature exceeds the set upper limit T of the solar collector 1. tH Then, open the first solenoid valve 2 and the second solenoid valve 4, close the third solenoid valve 16 and the fourth solenoid valve 18, turn on the solar return water pump 8, and turn off the hot water storage tank supply water pump 14 until the room temperature is higher than the set room temperature upper limit.

[0064] If the water temperature in the solar water storage tank is lower than the set lower limit T of the solar collector 1 tL Determine whether the water temperature Tw inside the heat pump storage tank 20 is greater than the second set upper limit temperature T. mL ;

[0065] If the water temperature Tw inside the heat pump storage tank 20 is greater than the second set upper limit temperature T mL Then, the third solenoid valve 16 and the fourth solenoid valve 18 are opened, the first solenoid valve 2 and the second solenoid valve 4 are closed, the hot water tank water supply pump 14 is turned on, and the solar return water pump 8 is turned off, until the room temperature is higher than the set room temperature upper limit T. SH until;

[0066] iv) When the room temperature of the heated room is higher than the set upper limit T SH When the solar return water pump 8, the hot water storage tank supply water pump 14, the first solenoid valve 2, the second solenoid valve 4, the third solenoid valve 16, and the fourth solenoid valve 18 are shut down.

[0067] v) A heat tracing cable 30 is installed on the water pipe at the inlet of the solar hot water storage tank;

[0068] The controller 22 is also used for:

[0069] When the water temperature at the inlet of the solar water storage tank is lower than the third set lower limit temperature T B At that time, turn on the heating cable 30 until the water temperature at the inlet of the solar water storage tank is higher than the third set lower limit temperature T. B When this happens, turn off the heat tracing cable 30.

[0070] (2) Figure 4 As shown, when the active and passive solar coupled heating system is operating in the time + room temperature control mode, the controller 22 is used to:

[0071] 1) Based on time and the temperature T in the middle of the heat pump storage tank 20 W The low-temperature air source heat pump heating unit 34 is operated under joint control. When the time is within the first set time period, if the water temperature T of the heat pump storage tank 20 is... W Below the fourth set lower limit temperature T L Then, the low-temperature air source heat pump heating unit 34 is started until the water temperature of the heat pump storage tank 20 is higher than the third set upper limit temperature T. H When the time is outside the first set time period, the low-temperature air source heat pump heating unit 34 stops operating; during the operation of the low-temperature air source heat pump heating unit 34, its operation mode is controlled by its own control system. The first set time period is 12:00-18:00.

[0072] 2) The room temperature T in the heated room R =T S The operating parameters are used to control the operation of the circulating water pump (solar return water pump 8).

[0073] 3) When the room temperature T R Below the set room temperature lower limit T SL If the time falls within the second set time period, then the third solenoid valve 16 and the fourth solenoid valve 18 are opened, the first solenoid valve 2 and the second solenoid valve 4 are closed, the hot water tank water supply pump 14 is turned on, and the solar return water pump 8 is turned off, until the room temperature T is reached. R Higher than the set upper limit of room temperature T SH The second set time period is 6:00-18:00;

[0074] When the room temperature is lower than the set lower limit and the time is within the third set time period, if the water temperature T in the solar water storage tank... i The temperature exceeds the set upper limit T of the solar collector 1. tH Then, the first solenoid valve 2 and the second solenoid valve 4 are opened, the third solenoid valve 16 and the fourth solenoid valve 18 are closed, the solar return water pump 8 is turned on, and the hot water storage tank supply water pump 14 is turned off, until the room temperature is higher than the set room temperature upper limit T. SH The third set time period is 18:00-6:00.

[0075] 4) When the room temperature T R Higher than the set upper limit of room temperature T SH When the solar return water pump 8, the hot water storage tank supply water pump 14, the first solenoid valve 2, the second solenoid valve 4, the third solenoid valve 16, and the fourth solenoid valve 18 are shut down.

[0076] 5) When the outdoor water pipe temperature measured by the temperature probe 31 of the heat tracing cable is lower than the set temperature T of the heat tracing cable 30 B When the temperature reaches the lower limit, turn on the heating cable 30 until the outdoor water pipe temperature is higher than the set temperature T of the heating cable 30. B Up to the upper limit.

[0077] In view of the advantages and disadvantages of passive solar houses and active solar heating systems, this invention adopts a combination of the two, which can not only maintain the stability of room temperature, but also make up for the poor stability and low efficiency of passive solar houses. At the same time, the optimal matching design of active and passive combination can not only maximize the utilization of solar energy, but also reduce investment.

[0078] This invention provides a coupled active and passive solar heating system with advantages such as high system energy efficiency and stable operation. It can not only provide a practical solution for improving the indoor thermal environment in rural areas and reducing indoor air pollution caused by burning solid fuels such as biomass and coal for heating, but also provide important reference value and engineering design basis for solar heating applications.

[0079] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0080] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A coupled active and passive solar heating system, characterized in that, include: The system includes a controller, a heated room, floor heating coils laid on the floor of the heated room, a solar collector installed on the roof of the heated room, a low-temperature air source heat pump heating unit installed outside the heated room, a heat pump hot water storage tank installed inside the heated room, and a sunroom located on the south side of the heated room; the solar collector includes a solar hot water storage tank. The outlet of the solar hot water storage tank is connected to the inlet of the floor coil, the outlet of the floor coil is connected to the inlet of the solar hot water storage tank, the first outlet of the heat pump hot water storage tank is connected to the inlet of the floor coil, the first return outlet of the heat pump hot water storage tank is connected to the outlet of the floor coil, the second outlet of the heat pump hot water storage tank is connected to the inlet of the low-temperature air source heat pump heating unit, and the second return outlet of the heat pump hot water storage tank is connected to the outlet of the low-temperature air source heat pump heating unit. The active and passive solar coupled heating system includes a room temperature control mode. When the active and passive solar coupled heating system is operating in the room temperature control mode, the controller is used to: The operation of the low-temperature air source heat pump heating unit is controlled according to the water temperature in the heat pump storage tank. The operation of the solar collector and the heat pump hot water storage tank is controlled according to the room temperature of the heated room; A first solenoid valve is installed on the water supply pipe at the outlet of the solar hot water storage tank; a second solenoid valve is installed on the water supply pipe at the inlet of the solar hot water storage tank; a third solenoid valve is installed on the water supply pipe at the first outlet; a fourth solenoid valve is installed on the water supply pipe at the first return outlet; a solar return water pump is installed on the water supply pipe between the outlet of the floor coil and the second solenoid valve; and a hot water storage tank water supply pump is installed between the inlet of the floor coil and the third solenoid valve. The active and passive solar coupled heating system includes a time + room temperature control mode. When the active and passive solar coupled heating system is operating in the time + room temperature control mode, the controller is used to: When the time is within the first set time period, if the water temperature of the heat pump storage tank is lower than the fourth set lower limit temperature, the low-temperature air source heat pump heating unit will be started until the water temperature of the heat pump storage tank is higher than the third set upper limit temperature; when the time is not within the first set time period, the low-temperature air source heat pump heating unit will stop operating; the first set time period is 12:00-18:

00. When the room temperature is lower than the set lower limit and the time is within the second set time period, the third and fourth solenoid valves are opened, the first and second solenoid valves are closed, the hot water tank water supply pump is turned on, and the solar return water pump is turned off until the room temperature is higher than the set upper limit; the second set time period is 6:00-18:

00. When the room temperature is lower than the set lower limit and the time is within the third set time period, if the water temperature in the solar hot water storage tank is higher than the set upper limit of the solar collector, then the first and second solenoid valves are opened, the third and fourth solenoid valves are closed, the solar return water pump is turned on, and the hot water storage tank supply water pump is turned off, until the room temperature is higher than the set upper limit; the third set time period is 18:00-6:

00. When the room temperature is higher than the set upper limit, the solar water return pump, the hot water storage tank water supply pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are shut down.

2. The active and passive solar coupled heating system according to claim 1, characterized in that, In controlling the operation of the low-temperature air-source heat pump heating unit based on the water temperature in the heat pump storage tank, the controller is specifically used for: When the water temperature in the heat pump storage tank is lower than the first set lower limit temperature, the low-temperature air source heat pump heating unit is started until the temperature in the heat pump storage tank is higher than the first set upper limit temperature, at which point the low-temperature air source heat pump heating unit is stopped.

3. The active and passive solar coupled heating system according to claim 1, characterized in that, In controlling the operation of the solar collector and the heat pump hot water storage tank according to the room temperature of the heated room, the controller is specifically used for: When the room temperature of the heated room is lower than the set lower limit, it is determined whether the water temperature in the solar hot water storage tank is higher than the set upper limit of the solar collector. If the water temperature in the solar hot water storage tank is higher than the set upper limit of the solar collector, then the first solenoid valve and the second solenoid valve are opened, the third solenoid valve and the fourth solenoid valve are closed, the solar return water pump is turned on, and the hot water storage tank supply water pump is turned off until the room temperature is higher than the set upper limit of the room temperature. If the water temperature in the solar hot water storage tank is lower than the set lower limit of the solar collector, determine whether the water temperature in the heat pump hot water storage tank is greater than the second set upper limit temperature. If the water temperature in the heat pump storage tank is higher than the second set upper limit temperature, then the third and fourth solenoid valves are opened, the first and second solenoid valves are closed, the water supply pump of the storage tank is turned on, and the solar return water pump is turned off until the room temperature is higher than the set upper limit of room temperature. When the room temperature of the heated room is higher than the set upper limit, the solar return water pump, the hot water storage tank supply water pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are shut down.

4. The active and passive solar coupled heating system according to claim 1, characterized in that, A heat tracing cable is installed on the water pipe at the inlet of the solar hot water storage tank; The controller is also used for: When the water temperature at the inlet of the solar hot water storage tank is lower than the third set lower limit temperature, the heating tape is turned on until the water temperature at the inlet of the solar hot water storage tank is higher than the third set lower limit temperature, at which point the heating tape is turned off.

5. The active and passive solar coupled heating system according to claim 1, characterized in that, It also includes a water replenishment device, which is connected to the second solenoid valve via a check valve.

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