Solar cooling and heating energy-saving device

Abstract

The utility model discloses a solar energy cooling and heating energy-saving device, which comprises a solar heat collector, the outlet end of the heat storage tank is connected with a water return port of the solar heat collector through a first valve, and the inlet end of the heat storage tank is connected with a third circulating pump on a water outlet of the solar heat collector through a third valve; the water inlet end of the absorption heat pump system is connected with a third circulating pump through a second circulating pump, the water outlet end of the absorption heat pump system is connected with a water return port of the solar heat collector, and hot water generated by the solar heat collector is used for heating or refrigerating the indoor space as required by utilizing the characteristic that the absorption heat pump system can be used for heating and refrigerating.

Description

A solar-powered cooling and heating energy-saving device Technical Field

[0001] This utility model relates to the field of refrigeration and heating equipment technology, and in particular to a solar-powered cooling and heating energy-saving device. Background Technology

[0002] Existing solar energy systems either only provide heating in winter or only provide domestic hot water. Solar collectors selected for winter heating generally experience severe overheating in summer. The excess heat energy is useless, and to eliminate the overheating, shading nets need to be manually installed, which wastes equipment resources and is prone to equipment failure. Therefore, a solar cooling and heating device is proposed. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model provides a solar-powered cooling and heating energy-saving device.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A solar-powered cooling and heating energy-saving device, comprising:

[0006] Solar collectors;

[0007] The heat storage tank has its outlet end connected to the return water port of the solar collector via a first valve, and its inlet end connected to the third circulation pump on the outlet of the solar collector via a third valve.

[0008] The absorption heat pump system has its inlet end connected to the second and third circulation pumps, and its outlet end connected to the return water port of the solar collector. Utilizing the characteristic of the absorption heat pump system that can both heat and cool, the hot water generated by the solar collector is used to heat or cool the room as needed.

[0009] A second valve is installed on the return water inlet of the solar collector; a fourth valve is installed on the outlet of the third circulation pump.

[0010] The absorption heat pump system includes:

[0011] The generator has its inlet end connected to the second circulation pump and its outlet end connected to the return water port of the solar collector.

[0012] The condenser has its circulating working fluid inlet connected to the first circulating working fluid outlet of the generator;

[0013] The evaporator has its circulating working fluid inlet connected to the condenser's circulating working fluid outlet via an expansion valve;

[0014] The absorber has its first inlet end connected to the circulating working fluid outlet end of the evaporator;

[0015] The solution heat exchanger has its first inlet end of circulating working fluid connected to the outlet end of circulating working fluid of the absorber, its first outlet end of circulating working fluid connected to the inlet end of circulating working fluid of the generator, the second outlet end of circulating working fluid of the generator connected to the second inlet end of circulating working fluid of the solution heat exchanger, and the second outlet end of circulating working fluid of the solution heat exchanger connected to the second inlet end of circulating working fluid of the absorber through a first circulating pump.

[0016] The beneficial effects of this utility model are as follows: This utility model is applicable to low-rise buildings such as bungalows, villas, office buildings, and schools in hot-summer and cold-winter regions where the need is to balance summer cooling and winter heating. It can also be adopted in cold regions after testing and calculation to select reasonably suitable equipment. This utility model couples a solar collector, a heat storage tank, and an absorption heat pump system, switching them through valve control to achieve summer cooling and winter heating, maximizing the utilization of the system's equipment capacity, improving the utilization rate of solar energy, and enhancing the effectiveness and reliability of the device. In winter heating mode, the absorption heat pump system is off. The solar collector absorbs solar radiation and converts it into high-temperature heat energy, which is supplied to the building through the heating system at noon. Excess heat is stored in the heat storage tank, and the tank releases heat for heating at night. In summer cooling mode, the absorption heat pump system is on. The solar collector absorbs solar radiation and converts it into high-temperature heat energy. At noon, the high-temperature heat energy directly drives the absorption heat pump system for cooling, and excess heat is stored in the heat storage tank. In the morning or afternoon when solar radiation is lower, the heat storage tank releases heat to drive the absorption heat pump system for cooling. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 is a schematic diagram of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0020] As shown in Figure 1, a solar energy-saving device for cooling and heating includes: a solar collector 7; a heat storage tank 4, the outlet of which is connected to the return water port of the solar collector 7 via a first valve 3, and the inlet of which is connected to a third circulation pump 8 on the outlet of the solar collector 7 via a third valve 11; and an absorption heat pump system, the inlet of which is connected to the third circulation pump 8 via a second circulation pump 12, and the outlet of which is connected to the return water port of the solar collector 7. Utilizing the characteristic of the absorption heat pump system that can both heat and cool, the hot water generated by the solar collector 7 is used to heat or cool the room as needed.

[0021] As shown in Figure 1, a second valve 5 is installed on the return water port of the solar collector 7; a fourth valve 9 is installed on the outlet of the third circulation pump 8.

[0022] As shown in Figure 1, the absorption heat pump system includes: a generator 2, whose inlet end is connected to a second circulating pump 12, and whose outlet end is connected to the return water port of a solar collector 7; a condenser 1, whose circulating working fluid inlet end is connected to the first circulating working fluid outlet end of the generator 2; an evaporator 6, whose circulating working fluid inlet end is connected to the circulating working fluid outlet end of the condenser 1 via an expansion valve 10; an absorber 15, whose circulating working fluid inlet end is connected to the circulating working fluid outlet end of the evaporator 6; a solution heat exchanger 13, whose circulating working fluid inlet end is connected to the circulating working fluid outlet end of the absorber 15, whose circulating working fluid outlet end is connected to the circulating working fluid inlet end of the generator 2, whose circulating working fluid outlet end is connected to the second circulating working fluid inlet end of the solution heat exchanger 13, and whose circulating working fluid outlet end of the solution heat exchanger 13 is connected to the second circulating working fluid inlet end of the absorber 15 via a first circulating pump 14.

[0023] Among them, solar collector 7 is a glass-metal vacuum tube solar collector with an added emitter plate. The design medium temperature is 150℃, the heat medium is antifreeze, the pressure is 0.6MPa, the freezing point of the antifreeze is -40℃, and the boiling point is 200℃. The heat storage tank 4 uses carbon steel medium, the tank body is at atmospheric pressure, the heat storage medium is PCM133 phase change heat storage, the phase change temperature is 130℃, the phase change enthalpy is 220KJ / Kg, the solid density is 950Kg / m³, the thermal conductivity is 0.65W / (m·K), and the heat medium is still antifreeze.

[0024] When using this utility model:

[0025] Summer Operation: Open valves 3, 5, 11, and 9, and activate circulation pumps 14 and 12. During the day, with ample solar radiation, the water in solar collector 7, absorbing solar energy, heats generator 2. Excess heat is stored in storage tank 4 and used to heat generator 2 at night. When generator 2 is heated, the circulating working fluid vaporizes, generating steam at a certain pressure. This steam enters condenser 1 and releases heat at constant pressure. The high-temperature, high-pressure steam flows through expansion valve 10 for throttling and cooling, achieving constant-pressure heat absorption in evaporator 6. Absorbing indoor temperature (evaporator 6 is indoors), the low-pressure steam in evaporator 6 enters absorber 15. The dilute solution of the working fluid absorbed in absorber 15 then enters generator 2, completing the entire cycle and achieving summer cooling. Flow: Generator 2—Condenser 1—Expansion Valve 10—Evaporator 6 (Refrigeration)—Absorber 15—Solution Heat Exchanger 13—Generator 2.

[0026] Winter operation: Open valves 3, 5, 11, and 9, and activate circulation pumps 14, 12, and 8. During the day, solar collector 7 heats generator 2, and excess heat is stored in heat storage tank 4. At night, heat storage tank 4 heats generator 2, and the circulating working fluid vaporizes. Utilizing the working principle of condenser 1, the gas or vapor is converted into liquid, and the heat is transferred to the surrounding air to achieve the heating mode and provide heating for residential use.

[0027] Benefits: In summer, solar energy is converted into heat energy, which is used as the driving force to achieve cooling through an absorption heat pump system. In winter, solar energy is converted into heat energy, which is used as the driving force to achieve heating mode through the adjustment sensors and control valves of the absorption heat pump system. This heat meets the heating needs of residents. This utility model efficiently utilizes solar energy through an absorption heat pump system to achieve cooling in summer, reducing the use of multi-split air conditioning systems. In winter, it provides heating, sharing the heat load of electric boilers and reducing the consumption of high-grade electricity. While meeting the heating and cooling needs of residents in summer and winter, it also adopts clean technology to reduce carbon emissions.

[0028] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A solar-powered cooling and heating energy-saving device, characterized in that, include: Solar collector (7); heat storage tank (4), the outlet end is connected to the return water port of solar collector (7) through the first valve (3), and the inlet end is connected to the third circulation pump (8) on the outlet of solar collector (7) through the third valve (11); absorption heat pump system, the inlet end of which is connected to the third circulation pump (8) through the second circulation pump (12), and the outlet end is connected to the return water port of solar collector (7). Taking advantage of the characteristic of absorption heat pump system that can both heat and cool, the hot water generated by solar collector (7) is used to heat or cool the room as needed.

2. The solar-powered cooling and heating energy-saving device according to claim 1, characterized in that, The solar collector (7) is equipped with a second valve (5) at its return water inlet; the third circulation pump (8) is equipped with a fourth valve (9) at its outlet.

3. The solar-powered cooling and heating energy-saving device according to claim 1, characterized in that, The absorption heat pump system includes: a generator (2), whose inlet is connected to a second circulating pump (12) and whose outlet is connected to the return water port of a solar collector (7); a condenser (1), whose circulating working fluid inlet is connected to the first circulating working fluid outlet of the generator (2); an evaporator (6), whose circulating working fluid inlet is connected to the circulating working fluid outlet of the condenser (1) via an expansion valve (10); and an absorber (15), whose circulating working fluid inlet is connected to the circulating working fluid outlet of the evaporator (6). The inlet of the solution heat exchanger (13) is connected to the first inlet of the circulating working fluid and the outlet of the circulating working fluid of the absorber (15). The first outlet of the circulating working fluid is connected to the inlet of the circulating working fluid of the generator (2). The second outlet of the circulating working fluid of the generator (2) is connected to the second inlet of the circulating working fluid of the solution heat exchanger (13). The second outlet of the circulating working fluid of the solution heat exchanger (13) is connected to the second inlet of the circulating working fluid of the absorber (15) through the first circulating pump (14).

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