A heating device and its control method

Abstract

The present invention discloses a heating device and a control method thereof, which relate to the technical field of heating equipment and solve the technical problems in the prior art of combining solar energy with a single heat source heat pump for heating, which results in a significant reduction in the efficiency of the heating device in winter or a large limitation in the application of the water source heat pump. The heating device of the present invention comprises a solar thermal collection module, a water storage tank, a dual-heat source heat pump module and a terminal device, wherein a heating circulation loop is formed between the solar thermal collection module and the water storage tank, and the water storage tank is connected to the terminal device to form a first heating loop; the dual-heat source heat pump module comprises a first heating component and a second heating component, wherein the first heating component is connected to the terminal device to form a second heating loop; the water storage tank is connected to the second heating component, and the second heating component is connected to the terminal device to form a third heating loop. The heating device of the present invention adopts the form of dual-heat source complementary heating, which can avoid the limitations of a single heat source.

Description

Technical Field

[0001] The present invention relates to the technical field of heating equipment, and in particular to a heating device and a control method thereof. Background Art

[0002] In northern China, winters are harsh. While urban areas have municipal heating networks, rural areas mostly rely on small household boilers, which burn coal and produce large amounts of flue gas, which is detrimental to the environment. Given current developments, complementary solar-heat pump heating systems could become the norm in the future. These systems can effectively improve the efficiency of heat pumps in cold regions. The application of complementary solar-heat pump heating demonstrates the feasibility of using multiple energy sources for heating in cold regions. It also effectively addresses the high energy consumption and severe environmental pollution associated with boiler heating systems. Furthermore, using clean energy sources like solar and air energy for heating offers flexible deployment and ease of construction.

[0003] The prior art discloses a solar-powered, day-and-night indoor heating device, which includes: a solar thermal collection module, a photovoltaic panel, a fan, a heat storage tank, and an outdoor air duct. After the air is heated in the solar thermal collection module and absorbs the heat generated by the photovoltaic panel, it passes through the heat storage tank from the outlet of the solar thermal collection module, flows into the room through the air inlet, and then returns to the inlet of the solar thermal collection module through the return air outlet. Compared with the prior art, this technology breaks the traditional heating mode and uses a selective absorption coating to absorb solar radiation energy to heat the air to heat the room. The heat storage tank can store excess heat during the day, achieve day-and-night heating, and provide a small amount of domestic hot water. This device makes full use of solar energy and has the advantages of energy saving and environmental protection, low operating costs, high energy utilization, and the ability to improve indoor air quality and enhance comfort.

[0004] Another prior art discloses a solar air conditioning heat source system that integrates a solar water heater and an air-source heat pump water heater. The solar water heater converts solar energy into a heat source that can be used by the central air conditioning system through photothermal conversion, providing the heat required for daytime heating and humidification. The air-source heat pump water heater draws heat from the air through a heat pump, providing the heat required for heating and humidification when solar energy is insufficient. This system utilizes both solar and air energy renewable energy, offering energy-saving and environmental advantages.

[0005] Solar energy-heat pump complementary heating devices include solar energy-air source heat pump combined heating devices and solar energy-water source heat pump combined heating devices. However, the applicant found that combining solar energy with a single heat source heat pump for heating has the following defects: if solar energy is combined with an air source heat pump for heating, the air source heat pump is prone to frost in areas with low temperatures in winter or relatively humid outdoor air, which significantly reduces the efficiency of the entire heating device. The heat capacity of air is small, and a larger amount of air is required to obtain the same amount of heat; if solar energy is combined with a water source heat pump for heating, the application of the water source heat pump has great limitations due to the limitations of the water source conditions available for the water source heat pump and the economic issues of investment. Specifically, the installation site of the water source heat pump system must be close to a water source, and the extraction of water must overcome the geographical structure limitations of the water layer. At the same time, if groundwater is over-exploited and not recharged in time, it will cause geological disasters and pose a safety hazard.

[0006] Therefore, there is an urgent need to improve the existing solar energy and single heat source heat pump combined heating device. Summary of the Invention

[0007] The present invention aims to provide a heating device and control method thereof, resolving the existing technical issues of combining solar energy with a single-source heat pump for heating, which can significantly reduce heating efficiency in winter or impose significant limitations on the use of water-source heat pumps. The various technical benefits of the preferred technical solution of the present invention are detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] The heating device of the present invention includes a solar thermal collection module, a hot water storage tank, a dual-heat source heat pump module and a terminal device, wherein a heating circulation loop is formed between the solar thermal collection module and the hot water storage tank, and the hot water storage tank is connected to the terminal device to form a first heating loop; the dual-heat source heat pump module includes a first heating component and a second heating component, wherein the first heating component is connected to the terminal device to form a second heating loop; the hot water storage tank is connected to the second heating component, and the second heating component is connected to the terminal device to form a third heating loop.

[0010] According to a preferred embodiment, the dual-heat source heat pump module includes an air source evaporator, a water source evaporator, a compressor, a throttle valve and a condenser, wherein the air source evaporator and the water source evaporator are arranged in parallel; the air source evaporator, the compressor, the condenser, the throttle valve and the air source evaporator are connected in sequence to form the first heating component; the water source evaporator, the compressor, the condenser, the throttle valve and the water source evaporator are connected in sequence to form the second heating component.

[0011] According to a preferred embodiment, the dual-source heat pump module further includes a first control valve group, which is arranged on the first heating component and the second heating component, and is used to control the on and off states of the first heating component and the second heating component.

[0012] According to a preferred embodiment, the first control valve group includes a first three-way valve and a second three-way valve, wherein the three interfaces of the first three-way valve are respectively connected to the outlet of the air source evaporator, the outlet of the water source evaporator and the inlet of the throttle valve; the three interfaces of the second three-way valve are respectively connected to the inlet of the air source evaporator, the inlet of the water source evaporator and the outlet of the compressor.

[0013] According to a preferred embodiment, the heating device also includes a second control valve group, which is arranged on the first heating circuit, the second heating circuit and the third heating circuit, and the second control valve group is used to control the on and off states of the first heating circuit, the second heating circuit and the third heating circuit.

[0014] According to a preferred embodiment, the second control valve group includes a first stop valve, a second stop valve, a third stop valve, a fourth stop valve and a fifth stop valve, wherein the first stop valve is arranged on the water supply pipe of the first heating circuit, and the second stop valve is arranged on the return pipe of the first heating circuit; the third stop valve is arranged on the water supply pipes of the second heating circuit and the third heating circuit, and the fourth stop valve is arranged on the return pipes of the second heating circuit and the third heating circuit; the fifth stop valve is arranged between the hot water storage tank and the water source evaporator of the dual heat source heat pump module.

[0015] According to a preferred embodiment, the heating device also includes a first water pump, a second water pump and a third water pump, wherein the first water pump is arranged on the pipeline for connecting the solar thermal collection module and the hot water storage tank, the second water pump is arranged on the water supply pipeline of the first heating circuit, the second heating circuit and the third heating circuit, and the third water pump is arranged on the pipeline for connecting the hot water storage tank and the water source evaporator of the dual heat source heat pump module.

[0016] According to a preferred embodiment, the heating device further includes a first temperature detector, which is located in the hot water storage tank and is used to detect the water temperature in the hot water storage tank.

[0017] According to a preferred embodiment, the heating device also includes a second temperature detector, which is located on the water supply pipes of the second heating circuit and the third heating circuit, and the second temperature detector is used to detect the water temperature on the water supply pipes of the second heating circuit and the third heating circuit.

[0018] The control method of the heating device according to any technical solution of the present invention comprises the following steps:

[0019] Get the water temperature in the hot water storage tank;

[0020] comparing the water temperature in the hot water storage tank with a preset temperature;

[0021] Based on the comparison result between the water temperature in the hot water storage tank and the preset temperature, the on / off states of the first heating circuit, the second heating circuit and the third heating circuit are controlled.

[0022] According to a preferred embodiment, the water temperature in the heat storage tank satisfies T>T 11 When the first heating circuit is in a connected state, the second heating circuit and the third heating circuit are in a disconnected state;

[0023] The water temperature in the heat storage tank satisfies T 12 ≤T≤T 11 When the first heating circuit and the second heating circuit are connected, the third heating circuit is disconnected;

[0024] The water temperature in the heat storage tank satisfies T<T 12 When the first heating circuit and the second heating circuit are in a disconnected state, the third heating circuit is in a connected state;

[0025] Wherein, T is the water temperature in the water storage tank, T 11 is the first preset temperature, T 12 is the second preset temperature.

[0026] According to a preferred embodiment, when the second heating circuit or the third heating circuit is in a connected state, the control method further comprises the following steps:

[0027] obtaining a water temperature on a water supply pipe of the second heating circuit or the third heating circuit;

[0028] comparing the water temperature on the water supply pipe of the second heating circuit or the third heating circuit with the required temperature of the terminal device;

[0029] Based on the comparison result of the water temperature on the water supply pipeline and the required temperature of the terminal device, the opening degree of the second control valve group on the second heating circuit or the third heating circuit is controlled.

[0030] According to a preferred embodiment, the water temperature on the water supply pipe of the second heating circuit or the third heating circuit satisfies T'<T 21 When the temperature of the second heating circuit or the third heating circuit is increased, the opening of the second control valve group is controlled to decrease;

[0031] The water temperature on the water supply pipe of the second heating circuit or the third heating circuit satisfies T'≥T 21 When the temperature of the second heating circuit or the third heating circuit is increased, the opening of the second control valve group is controlled to increase;

[0032] Wherein, T' is the water temperature on the water supply pipe of the second heating circuit or the third heating circuit, T 21 is the required temperature of the terminal device.

[0033] The heating device and control method thereof provided by the present invention have at least the following beneficial technical effects:

[0034] The heating device and control method thereof of the present invention form a heating circulation loop between the solar thermal collection module and the heat storage tank, and solar energy can be used to heat the water in the heat storage tank. The heat storage tank is connected to the terminal device to form a first heating loop, that is, when the water temperature in the heat storage tank is high enough, the hot water in the heat storage tank can be used to heat the terminal device; the first heating component is connected to the terminal device to form a second heating loop, the heat storage tank is connected to the second heating component, and the second heating component is connected to the terminal device to form a third heating loop, that is, when the water temperature in the heat storage tank does not meet the requirements of the terminal device, the terminal device can also be heated by the second heating loop or the third heating loop.

[0035] The heating device and control method of the present invention include a dual-heat-source heat pump module comprising a first heating component and a second heating component. For example, the first heating component can be an air-source heating component, and the second heating component can be a water-source heating component. This dual-heat-source complementary heating system avoids the limitations of a single heat source, resolving both the technical problem of significantly reduced efficiency of air-source heating components in winter and the technical problem of significant limitations in the application of water-source heat pumps. Furthermore, the heating device and control method of the present invention include multiple heating circuits, which can be selected based on the water temperature in the hot water storage tank, allowing the multiple heating circuits to complement each other. Specifically, the heating device and control method of the present invention, with their multiple complementary heating circuits, not only effectively utilizes clean energy sources such as solar energy and air energy, but also enables the heating device of the present invention to heat terminal devices day and night, avoiding the influence of meteorological conditions and unstable solar energy. The time required for solar energy to directly heat the hot water in the hot water storage tank to the required temperature of the terminal device is relatively short, and the solar energy collection device requires a large area, resulting in reduced solar energy utilization.

[0036] In the heating device and control method thereof of the present invention, a heat storage tank is connected to a second heating component, and the second heating component is connected to a terminal device to form a third heating circuit. That is, when the water temperature in the heat storage tank does not meet the requirements of the terminal device, the heat storage tank can serve as the heating end of the evaporation side of the second heating component, thereby improving the heat exchange efficiency of the evaporation side. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 is a schematic diagram of a preferred embodiment of the heating device of the present invention;

[0039] Figure 2 is a flow chart of a preferred embodiment of a control method for a heating device of the present invention;

[0040] Figure 3 The following is a flow chart of a preferred embodiment of the control method of the heating device of the present invention.

[0041] In the figure: 11. Solar thermal collection module; 12. Hot water storage tank; 13. Dual-source heat pump module; 131. Air source evaporator; 132. Water source evaporator; 133. Compressor; 134. Throttle valve; 135. Condenser; 136. First three-way valve; 137. Second three-way valve; 14. Terminal equipment; 151. First stop valve; 152. Second stop valve; 153. Third stop valve; 154. Fourth stop valve; 155. Fifth stop valve; 161. First water pump; 162. Second water pump; 163. Third water pump; 171. First temperature detector; 172. Second temperature detector. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0043] The following is attached with the instruction manual Figures 1 to 3 The heating device and control method thereof of the present invention are described in detail in Examples 1 and 2.

[0044] Example 1

[0045] This embodiment describes the heating device of the present invention in detail.

[0046] The heating device of this embodiment includes a solar heat collection module 11, a hot water storage tank 12, a dual heat source heat pump module 13 and a terminal device 14. Figure 1 As shown. Preferably, a heating circulation loop is formed between the solar thermal collection module 11 and the hot water storage tank 12, and the hot water storage tank 12 is connected to the terminal device 14 to form a first heating loop; the dual heat source heat pump module 13 includes a first heating component and a second heating component, wherein the first heating component is connected to the terminal device 14 to form a second heating loop; the hot water storage tank 12 is connected to the second heating component, and the second heating component is connected to the terminal device 14 to form a third heating loop, as shown. Figure 1 The first heating component is, for example, an air source heating component, and the second heating component is, for example, a water source heating component. The terminal device 14 is, for example, a floor heating coil.

[0047] Specifically, the water outlet of the hot water storage tank 12 is connected to the water inlet of the terminal device 14, and the water return of the hot water storage tank 12 is connected to the water outlet of the terminal device 14, thereby forming a first heating circuit between the hot water storage tank 12 and the terminal device 14. Similarly, the water outlet of the first heating component is connected to the water inlet of the terminal device 14, and the water return of the first heating component is connected to the water outlet of the terminal device 14, thereby forming a second heating circuit between the first heating component and the terminal device 14; the water outlet of the second heating component is connected to the water inlet of the terminal device 14, and the water return of the second heating component is connected to the water outlet of the terminal device 14, thereby forming a third heating circuit between the second heating component and the terminal device 14.

[0048] In the heating device of this embodiment, a heating circulation loop is formed between the solar thermal collection module 11 and the hot water storage tank 12, and solar energy can be used to heat the water in the hot water storage tank 12; and the hot water storage tank 12 is connected to the terminal device 14 to form a first heating loop, that is, when the water temperature in the hot water storage tank 12 is high enough, the hot water in the hot water storage tank 12 can be used to heat the terminal device 14; the first heating component is connected to the terminal device 14 to form a second heating loop, the hot water storage tank 12 is connected to the second heating component, and the second heating component is connected to the terminal device 14 to form a third heating loop, that is, when the water temperature in the hot water storage tank 12 does not meet the requirements of the terminal device 14, the terminal device 14 can also be heated by the second heating loop or the third heating loop.

[0049] In the heating device of this embodiment, the dual-heat-source heat pump module 13 includes a first heating component and a second heating component. For example, the first heating component can be an air-source heating component, and the second heating component can be a water-source heating component. This dual-heat-source complementary heating system avoids the limitations of a single heat source, addressing both the significant reduction in efficiency of air-source heating components in winter and the significant limitations of water-source heat pumps. Furthermore, the heating device of this embodiment includes multiple heating circuits, which can be selected based on the water temperature in the hot water storage tank 12, allowing the multiple heating circuits to complement each other. Specifically, the heating device of this embodiment, with its multiple complementary heating circuits, not only effectively utilizes clean energy sources such as solar energy and air energy, but also allows the heating device of this embodiment to heat the terminal device 14 day and night, avoiding the impact of meteorological conditions and unstable solar energy. The time required for solar energy to directly heat the hot water in the hot water storage tank 12 to the required temperature of the terminal device 14 is relatively short, and the solar energy collection device requires a larger area, resulting in reduced solar energy utilization.

[0050] In the heating device of this embodiment, the hot water storage tank 12 is connected to the second heating component, and the second heating component is connected to the terminal device 14 to form a third heating circuit. That is, when the water temperature in the hot water storage tank 12 does not meet the requirements of the terminal device 14, the hot water storage tank 12 can serve as the heating end of the evaporation side of the second heating component, thereby improving the heat exchange efficiency of the evaporation side.

[0051] According to a preferred embodiment, the dual heat source heat pump module 13 includes an air source evaporator 131, a water source evaporator 132, a compressor 133, a throttle valve 134 and a condenser 135, wherein the air source evaporator 131 and the water source evaporator 132 are arranged in parallel. Figure 1 The air source evaporator 131, the compressor 133, the condenser 135, the throttle valve 134 and the air source evaporator 131 are sequentially connected to form a first heating component, as shown. Figure 1 The water source evaporator 132, the compressor 133, the condenser 135, the throttle valve 134 and the water source evaporator 132 are sequentially connected to form a second heating component, as shown. Figure 1 As shown. That is, the first heating component is an air source heating component, and the air source evaporator 131 of the air source heating component can use the energy in the air for heating. Its heating principle can be the same as that of the existing technology, and will not be repeated here; the second heating component is a water source heating component, and the water source evaporator 132 of the water source heating component can use the energy in the water for heating. Its heating principle can be the same as that of the existing technology, and will not be repeated here. The heating device of the preferred technical solution of this embodiment, the dual heat source heat pump module 13 includes an air source heating component and a water source heating component. The two heating components can complement each other, avoiding the limitations of a single heat source, solving the technical problem that the efficiency of the air source heating component is significantly reduced in the winter heating device, and also solving the technical problem that the application of the water source heat pump has great limitations.

[0052] According to a preferred embodiment, the dual-source heat pump module 13 further includes a first control valve group, which is provided on the first heating component and the second heating component, and is used to control the on / off state of the first heating component and the second heating component. The on / off state referred to in the preferred technical solution of this embodiment includes a connected state and a disconnected state. The heating device of the preferred technical solution of this embodiment further includes a first control valve group, which can control the on / off state of the first heating component and the second heating component so that the first heating component or the second heating component can be selected to heat the terminal device 14 based on the water temperature in the hot water storage tank 12.

[0053] Preferably, the first control valve group includes a first three-way valve 136 and a second three-way valve 137, wherein the three interfaces of the first three-way valve 136 are respectively connected to the outlet of the air source evaporator 131, the outlet of the water source evaporator 132 and the inlet of the throttle valve 134; the three interfaces of the second three-way valve 137 are respectively connected to the inlet of the air source evaporator 131, the inlet of the water source evaporator 132 and the outlet of the compressor 133. Figure 1 The inlet of the water source evaporator 132 refers to the inlet of the side where the water source evaporator 132 is connected to the compressor 133; the outlet of the water source evaporator 132 refers to the outlet of the side where the water source evaporator 132 is connected to the throttle valve 134, as shown. Figure 1 See again Figure 1 It can be seen that the water source evaporator 132 also has another inlet and another outlet on the side connected to the hot water storage tank 12. Specifically, when the first heating component is needed to heat the terminal device 14, the interface connecting the first three-way valve 136 and the second three-way valve 137 to the air source evaporator 131 is in a connected state, and the interface connecting to the water source evaporator 132 is in a disconnected state, thereby allowing the dual-heat source heat pump module 13 to function as an air source heating component; when the second heating component is needed to heat the terminal device 14, the interface connecting the first three-way valve 136 and the second three-way valve 137 to the water source evaporator 132 is in a connected state, and the interface connecting to the air source evaporator 131 is in a disconnected state, thereby allowing the dual-heat source heat pump module 13 to function as a water source heating component.

[0054] According to a preferred embodiment, the heating device further includes a second control valve group, which is provided on the first heating circuit, the second heating circuit, and the third heating circuit, and is used to control the on / off status of the first heating circuit, the second heating circuit, and the third heating circuit. The heating device of the preferred technical solution of this embodiment further includes a second control valve group, which can control the on / off status of the first heating circuit, the second heating circuit, and the third heating circuit, so that at least one of the first heating circuit, the second heating circuit, and the third heating circuit can be selected to heat the terminal device 14 based on the water temperature in the hot water storage tank 12.

[0055] Preferably, the second control valve group includes a first stop valve 151, a second stop valve 152, a third stop valve 153, a fourth stop valve 154 and a fifth stop valve 155, wherein the first stop valve 151 is arranged on the water supply pipe of the first heating circuit, and the second stop valve 152 is arranged on the return pipe of the first heating circuit; the third stop valve 153 is arranged on the water supply pipes of the second heating circuit and the third heating circuit, and the fourth stop valve 154 is arranged on the return pipes of the second heating circuit and the third heating circuit; the fifth stop valve 155 is arranged between the hot water storage tank 12 and the water source evaporator 132 of the dual heat source heat pump module 13, as shown in FIG. Figure 1Specifically, when the first heating circuit is required to heat the terminal device 14, the first stop valve 151 and the second stop valve 152 are opened, and the third stop valve 153, the fourth stop valve 154, and the fifth stop valve 155 are closed. This allows the hot water in the hot water storage tank 12 to be delivered to the terminal device 14 through the first stop valve 151, and the return water after heat exchange with the terminal device 14 returns to the hot water storage tank 12 through the second stop valve 152. When the second heating circuit is required to heat the terminal device 14, the third stop valve 153 and the fourth stop valve 154 are opened, and the remaining stop valves are closed. This allows the return water after heat exchange with the terminal device 14 to return to the condenser 135 through the fourth stop valve 154, and then be delivered to the terminal device 14 through the third stop valve 153 after heat exchange with the condenser 135. When the third heating circuit is needed to heat the terminal device 14, the first stop valve 151 and the second stop valve 152 are in the closed state, and the third stop valve 153, the fourth stop valve 154 and the fifth stop valve 155 are in the open state, so that the hot water storage tank 12 can serve as the heating end of the water source evaporator 132, and then the hot water is pressurized and heat-exchanged by the compressor 133 and the condenser 135, and then sent to the terminal device 14 through the third stop valve 153. The return water after heat exchange with the terminal device 14 returns to the condenser 135 through the fourth stop valve 154.

[0056] According to a preferred embodiment, the heating device further includes a first water pump 161, a second water pump 162 and a third water pump 163, wherein the first water pump 161 is arranged on a pipeline for connecting the solar thermal collection module 11 and the hot water storage tank 12, the second water pump 162 is arranged on the water supply pipelines of the first heating circuit, the second heating circuit and the third heating circuit, and the third water pump 163 is arranged on a pipeline for connecting the hot water storage tank 12 and the water source evaporator 132 of the dual heat source heat pump module 13, as shown in FIG. Figure 1 The heating device of the preferred technical solution of this embodiment further includes a first water pump 161, a second water pump 162, and a third water pump 163. The first water pump 161 can accelerate the water flow rate between the solar thermal collection module 11 and the hot water storage tank 12; the second water pump 162 can accelerate the water flow rate between the dual-heat source heat pump module 13 and the terminal device 14; and the third water pump 163 can accelerate the water flow rate between the hot water storage tank 12 and the water source evaporator 132.

[0057] According to a preferred embodiment, the heating device further comprises a first temperature detector 171, which is located in the hot water storage tank 12 and is used to detect the water temperature in the hot water storage tank 12. Figure 1The heating device of the preferred technical solution of this embodiment further includes a first temperature detector 171, which can monitor the water temperature in the hot water storage tank 12 to provide a basis for determining the on / off status of the first heating circuit, the second heating circuit, and the third heating circuit. This allows the heating device to not only meet the needs of the terminal device 14 but also achieve the advantages of energy saving and high efficiency.

[0058] According to a preferred embodiment, the heating device further includes a second temperature detector 172, which is located on the water supply pipes of the second heating circuit and the third heating circuit. The second temperature detector 172 is used to detect the water temperature on the water supply pipes of the second heating circuit and the third heating circuit. Figure 1 The heating device of the preferred technical solution of this embodiment further includes a second temperature detector 172, which can monitor the water temperature on the water supply pipes of the second heating circuit and the third heating circuit, so as to provide a basis for determining the opening of each stop valve, so that the heating device can meet the needs of the terminal device 14.

[0059] Example 2

[0060] This embodiment describes in detail the control method of the heating device of the present invention.

[0061] Figure 2 FIG. 1 shows a flow chart of a preferred embodiment of the control method of the heating device of this embodiment. Figure 2 As shown, the control method of the heating device of any technical solution in Example 1 includes the following steps:

[0062] Step 1: Obtain the water temperature in the hot water storage tank 12.

[0063] Step 2: Compare the water temperature in the hot water storage tank 12 with a preset temperature.

[0064] Step 3: Based on the comparison result between the water temperature in the hot water storage tank 12 and the preset temperature, the on / off states of the first heating circuit, the second heating circuit and the third heating circuit are controlled.

[0065] The control method of the heating device of this embodiment controls the on / off states of the first, second, and third heating circuits based on a comparison between the water temperature in the hot water storage tank 12 and a preset temperature. This allows the multiple heating circuits to complement each other, effectively utilizing clean energy sources such as solar energy and air energy. Furthermore, the heating device of this embodiment can heat the terminal device 14 day and night, avoiding the issues of being affected by meteorological conditions and unstable solar energy. The time required for solar energy to directly heat the hot water in the hot water storage tank 12 to the required temperature of the terminal device 14 is short, and the required solar energy collection device area is large, resulting in reduced solar energy utilization. Secondly, controlling the on / off states of the first, second, and third heating circuits based on a comparison between the water temperature in the hot water storage tank 12 and a preset temperature also avoids the limitations of a single heat source, addressing both the significant reduction in the efficiency of air-source heating components in winter and the significant limitations of water-source heat pumps. Thirdly, when the water temperature in the hot water storage tank 12 does not meet the requirements of the terminal device 14, the hot water storage tank 12 can be used as the heating end of the evaporation side of the second heating component, thereby improving the heat exchange efficiency of the evaporation side.

[0066] Figure 3 FIG. 1 shows another preferred embodiment of the control method of the heating device of this embodiment. Figure 3 As shown, the water temperature in the hot water storage tank 12 satisfies T>T 11 When the first heating circuit is controlled to be in a connected state, the second heating circuit and the third heating circuit are controlled to be in a disconnected state; the water temperature in the hot water storage tank 12 satisfies T 12 ≤T≤T 11 When the first heating circuit and the second heating circuit are controlled to be in a connected state, the third heating circuit is controlled to be in a disconnected state; the water temperature in the hot water storage tank 12 satisfies T<T 12 When the first heating circuit and the second heating circuit are controlled to be disconnected, the third heating circuit is controlled to be connected; wherein T is the water temperature in the hot water storage tank 12, T 11 is the first preset temperature, T 12 More preferably, the first preset temperature is 45°C and the second preset temperature is 30°C.

[0067] Specifically, during the day, as solar energy continues to heat the water, the temperature in the hot water storage tank 12 continues to rise. When the solar energy heats the water in the hot water storage tank 12 to above a first preset temperature, the hot water in the hot water storage tank 12 can meet the needs of the terminal device 14. At this time, the first heating circuit is controlled to be connected, while the second and third heating circuits are controlled to be disconnected. That is, the first stop valve 151 and the second stop valve 152 are controlled to be open, and the third stop valve 153, the fourth stop valve 154, and the fifth stop valve 155 are controlled to be closed. This allows the hot water in the hot water storage tank 12 to be delivered to the terminal device 14 through the first stop valve 151, and the return water after heat exchange with the terminal device 14 returns to the hot water storage tank 12 through the second stop valve 152.

[0068] When it is cloudy or other circumstances where solar energy is insufficient to heat the water in the hot water storage tank 12 to above the first preset temperature, a combined heating mode of the first heating circuit and the second heating circuit can be adopted, with auxiliary heating provided by the second heating circuit to meet the needs of the terminal device 14 . At this time, the first heating circuit and the second heating circuit are controlled to be in a connected state, and the third heating circuit is controlled to be in a disconnected state, that is, the interface connected to the air source evaporator 131 of the first three-way valve 136 and the second three-way valve 137 is controlled to be in a connected state, and the interface connected to the water source evaporator 132 is in a disconnected state, the first stop valve 151 to the fourth stop valve 154 are controlled to be in an open state, and the fifth stop valve 155 is controlled to be in a closed state, so that the hot water in the heat storage tank 12 can be sent to the terminal device 14 through the first stop valve 151, and the return water after heat exchange with the terminal device 14 can be returned to the heat storage tank 12 through the second stop valve 152; at the same time, the return water after heat exchange with the terminal device 14 can also be returned to the condenser 135 through the fourth stop valve 154, and after heat exchange with the condenser 135, it can be sent to the terminal device 14 through the third stop valve 153.

[0069] In winter, when the temperature is low and the water in the hot water storage tank 12 is below the second preset temperature, the hot water storage tank 12 can no longer provide heating to the terminal device 14. Therefore, the third heating circuit can be used to provide heating to the terminal device 14 to meet the needs of the terminal device 14. In this case, the hot water storage tank 12 can be used as a heat source for the water source evaporator 132 to improve the heat exchange efficiency of the water source evaporator 132. At this time, the first heating circuit and the second heating circuit are controlled to be in a disconnected state, and the third heating circuit is controlled to be in a connected state, that is, the interface connecting the first three-way valve 136 and the second three-way valve 137 to the air source evaporator 131 is controlled to be in a disconnected state, and the interface connected to the water source evaporator 132 is controlled to be in a connected state, the first stop valve 151 and the second stop valve 152 are controlled to be in a closed state, and the third stop valve 153 to the fifth stop valve 155 are controlled to be in an open state, so that the hot water storage tank 12 can be used as the heating end of the water source evaporator 132, and then the hot water is pressurized and heat-exchanged by the compressor 133 and the condenser 135, and then sent to the terminal device 14 through the third stop valve 153, and the return water after heat exchange with the terminal device 14 returns to the condenser 135 through the fourth stop valve 154.

[0070] According to a preferred embodiment, when the second heating circuit or the third heating circuit is in a connected state, the control method further comprises the following steps:

[0071] Obtaining the water temperature on the water supply pipe of the second heating circuit or the third heating circuit;

[0072] comparing the water temperature on the water supply pipe of the second heating circuit or the third heating circuit with the required temperature of the terminal device 14;

[0073] Based on the comparison result of the water temperature on the water supply pipeline and the required temperature of the terminal device 14, the opening degree of the second control valve group on the second heating circuit or the third heating circuit is controlled.

[0074] Preferably, the second control valve group on the second heating circuit or the third heating circuit is the third stop valve 153 , the fourth stop valve 154 and the fifth stop valve 155 described in Example 1.

[0075] The control method of the preferred technical solution of this embodiment controls the opening of the second control valve group on the second heating circuit or the third heating circuit based on the comparison result of the water temperature on the water supply pipe of the second heating circuit or the third heating circuit with the required temperature of the terminal device 14. This not only makes the water supply temperature of the second heating circuit or the third heating circuit meet the requirements of the terminal device 14, but also speeds up the heating speed to the terminal device 14.

[0076] Preferably, the water temperature on the water supply pipe of the second heating circuit or the third heating circuit satisfies T'<T 21When the opening of the second control valve group on the second heating circuit or the third heating circuit is controlled to decrease; the water temperature on the water supply pipe of the second heating circuit or the third heating circuit satisfies T'≥T 21 When the opening of the second control valve group on the second heating circuit or the third heating circuit is controlled to increase; wherein T' is the water temperature on the water supply pipe of the second heating circuit or the third heating circuit, T 21 The required temperature of the terminal device 14 is, for example, 45° C. Specifically, when the water temperature on the water supply pipe of the second heating circuit or the third heating circuit satisfies T′<T 21 When the opening of the second control valve group on the second heating circuit or the third heating circuit is controlled to decrease, the temperature of the water flowing out of the condenser 135 can be increased, so that the water supply temperature of the second heating circuit or the third heating circuit meets the requirements of the terminal device 14; when the water temperature on the water supply pipe of the second heating circuit or the third heating circuit meets T'≥T 21 When the heating is turned on, the opening of the second control valve group on the second heating circuit or the third heating circuit is controlled to increase, thereby speeding up the heating speed to the terminal device 14.

[0077] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0078] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for controlling a heating device, characterized in that: The heating device comprises a solar heat collection module (11), a hot water storage tank (12), a dual-heat source heat pump module (13) and a terminal device (14), wherein a heating circulation loop is formed between the solar heat collection module (11) and the hot water storage tank (12), and The hot water storage tank (12) is connected to the terminal device (14) to form a first heating circuit; the dual-heat source heat pump module (13) includes a first heating component and a second heating component, wherein the first heating component is connected to the terminal device (14) to form a second heating circuit; the hot water storage tank (12) is connected to the second heating component, and the second heating component is connected to the terminal device (14) to form a third heating circuit; The control method includes the following steps: Obtaining the water temperature in the hot water storage tank (12); comparing the water temperature in the hot water storage tank (12) with a preset temperature; Based on the comparison result of the water temperature in the hot water storage tank (12) and the preset temperature, the on / off states of the first heating circuit, the second heating circuit and the third heating circuit are controlled; The water temperature in the heat storage tank (12) satisfies T>T 11 When the first heating circuit is in a connected state, the second heating circuit and the third heating circuit are in a disconnected state; The water temperature in the heat storage tank (12) satisfies T 12 ≤T≤T 11 When the first heating circuit and the second heating circuit are in a connected state, the third heating circuit is in a disconnected state; The water temperature in the heat storage tank (12) satisfies T<T 12 When the first heating circuit and the second heating circuit are controlled to be in a disconnected state, the third heating circuit is controlled to be in a connected state; Wherein, T is the water temperature in the water storage tank (12), T 11 is the first preset temperature, T 12 is a second preset temperature; When the second heating circuit or the third heating circuit is in a connected state, the control method further includes the following steps: obtaining a water temperature on a water supply pipe of the second heating circuit or the third heating circuit; comparing the water temperature on the water supply pipe of the second heating circuit or the third heating circuit with the required temperature of the terminal device (14); Based on the comparison result of the water temperature on the water supply pipeline and the required temperature of the terminal device (14), the opening degree of the second control valve group on the second heating circuit or the third heating circuit is controlled.

2. The control method for a heating device according to claim 1, characterized in that: The dual-heat-source heat pump module (13) comprises an air-source evaporator (131), a water-source evaporator (132), a compressor (133), a throttle valve (134), and a condenser (135), wherein the air-source evaporator (131) and the water-source evaporator (132) are arranged in parallel; The air source evaporator (131), the compressor (133), the condenser (135), the throttle valve (134) and the air source evaporator (131) are sequentially connected to form the first heating component; The water source evaporator (132), the compressor (133), the condenser (135), the throttle valve (134) and the water source evaporator (132) are connected in sequence to form the second heating component.

3. The control method of the heating device according to claim 2, characterized in that: The dual-heat-source heat pump module (13) further comprises a first control valve group, which is arranged on the first heating component and the second heating component, and is used to control the on / off state of the first heating component and the second heating component.

4. The control method of the heating device according to claim 3, characterized in that: The first control valve group includes a first three-way valve (136) and a second three-way valve (137), wherein: The three interfaces of the first three-way valve (136) are respectively connected to the outlet of the air source evaporator (131), the outlet of the water source evaporator (132) and the inlet of the throttle valve (134); the three interfaces of the second three-way valve (137) are respectively connected to the inlet of the air source evaporator (131), the inlet of the water source evaporator (132) and the outlet of the compressor (133).

5. The control method of a heating device according to claim 1, characterized in that: It also includes a second control valve group, which is arranged on the first heating circuit, the second heating circuit and the third heating circuit, and the second control valve group is used to control the on and off states of the first heating circuit, the second heating circuit and the third heating circuit.

6. The control method for a heating device according to claim 5, characterized in that: The second control valve group includes a first stop valve (151), a second stop valve (152), a third stop valve (153), a fourth stop valve (154) and a fifth stop valve (155), wherein: The first stop valve (151) is arranged on the water supply pipe of the first heating circuit, and the second stop valve (152) is arranged on the return pipe of the first heating circuit; The third stop valve (153) is provided on the water supply pipes of the second heating circuit and the third heating circuit, and the fourth stop valve (154) is provided on the return pipes of the second heating circuit and the third heating circuit; The fifth stop valve (155) is provided between the hot water storage tank (12) and the water source evaporator (132) of the dual-heat source heat pump module (13).

7. The control method of a heating device according to claim 5, characterized in that: It also includes a first water pump (161), a second water pump (162) and a third water pump (163), wherein: The first water pump (161) is arranged on a pipeline for connecting the solar thermal collection module (11) and the hot water storage tank (12); the second water pump (162) is arranged on the water supply pipelines of the first heating circuit, the second heating circuit and the third heating circuit; and the third water pump (163) is arranged on a pipeline for connecting the hot water storage tank (12) and the water source evaporator (132) of the dual-source heat pump module (13).

8. The control method of a heating device according to claim 1, characterized in that: It also includes a first temperature detector (171), which is located in the hot water storage tank (12) and is used to detect the water temperature in the hot water storage tank (12).

9. The control method of a heating device according to claim 1, characterized in that: The invention also includes a second temperature detector (172), which is located on the water supply pipes of the second heating circuit and the third heating circuit, and is used to detect the water temperature on the water supply pipes of the second heating circuit and the third heating circuit.

10. The method for controlling a heating device according to any one of claims 1 to 9, characterized in that: The water temperature on the water supply pipe of the second heating circuit or the third heating circuit satisfies T'<T 21 When the temperature of the second heating circuit or the third heating circuit is increased, the opening of the second control valve group is controlled to decrease; The water temperature on the water supply pipe of the second heating circuit or the third heating circuit satisfies T'≥T 21 When the temperature of the second heating circuit or the third heating circuit is increased, the opening of the second control valve group is controlled to increase; Wherein, T' is the water temperature on the water supply pipe of the second heating circuit or the third heating circuit, T 21 is the required temperature of the terminal device (14).

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