Cold and hot water unit based on comprehensive utilization of radiant heat

Abstract

The utility model discloses a cold and hot water unit based on comprehensive utilization of radiant heat. A radiation refrigeration film is arranged at the bottom of a heat collection pipe of a heat collection pipe heat collector, so that solar energy heat radiation in gaps of the pipe wall of the heat collection pipe is transmitted to the heat collection pipe; the surface temperature of the cooling plate can be effectively reduced while the heat collecting pipe obtains heat radiation, and the surface temperature or the air inlet temperature of fins of a fin type condenser of an air source unit can be effectively reduced. According to the refrigeration principle of the radiation refrigeration film, the cooling capacity of the low-temperature radiation refrigeration film is transmitted into the cold collection cavity through the cooling plate, meanwhile, air flowing through the cold collection cavity can be effectively reduced, the surface temperature or the air inlet temperature of fins of a fin type condenser of the air source unit is reduced, and the refrigeration efficiency EER value of the air source unit is further improved. The heat collection quantity of the heat collector of the heat collection pipe and the refrigeration efficiency EER value of the air source unit are improved, and the purposes of comprehensive utilization of radiation energy, energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] This utility model relates to the field of clean energy comprehensive utilization technology, and in particular to a hot and cold water unit that comprehensively utilizes solar radiation heat. Background Technology

[0002] In the thermal utilization of solar water heaters, the key is to convert solar radiation energy into heat energy, and the collector is the key part of various solar energy utilization devices. At present, most of the solar collectors on the market adopt collector tubes and flat-plate solar collector structures. Although solar collectors absorb heat quickly and have high efficiency, due to factors such as the outer diameter of the collector tubes and the installation and operation space, a gap of 22 to 35 mm needs to be reserved between the tube walls, resulting in a low utilization rate of solar radiation heat per unit area of ​​sunlight.

[0003] Air source chillers are widely used in small and medium-sized hotels, restaurants, and bath centers due to their ease of installation and cost-effectiveness. However, in some areas of southern China and northwestern China, when the outdoor temperature exceeds 40°C, the finned condensers of air source chillers are exposed to sunlight for a long time, resulting in excessively high surface temperatures and frequent high-pressure alarms during cooling operation. This leads to reduced cooling efficiency or even complete failure of the unit.

[0004] As a developer, producer, and construction unit in the field of clean energy, one of the important issues that usually needs to be addressed is to achieve the effective extraction, storage, and comprehensive utilization of solar thermal energy, ensuring the safe, stable, and efficient operation of solar collector hot water and air source cold (hot) water systems, regardless of whether it is a hot summer or a cold winter.

[0005] Regarding the functional characteristics mentioned above, the current technical problem to be solved is: how to design a chiller / hot water unit through technological improvements that can improve heat collection efficiency and integrate functions such as energy storage, heat dissipation of condenser fin surface temperature, or reduction of fin inlet air temperature, in order to solve the technical problems of low heat collection efficiency in summer and low energy efficiency of air source hot water units. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this utility model provides a chiller unit based on the comprehensive utilization of radiant heat. By setting a radiant cooling film and a cooling plate at the bottom of the heat collection tube of the heat collection tube, the radiant cooling film can effectively reflect all the sunlight it reflects onto the surface of the heat collection tube, and reduce the surface temperature of the film to below the ambient temperature through radiant heat exchange. While the heat collection tube obtains radiant heat, it can effectively reduce the surface temperature of the cooling plate and the surface temperature of the condenser fins or the air inlet temperature of the air source unit, and further improve the cooling efficiency (EER) value of the air source unit.

[0007] To achieve the above technical objectives, the present invention adopts the following technical solution: a hot and cold water unit based on the comprehensive utilization of radiant heat, which includes a solar collector, a radiant cooling film, a cooling plate, an air source unit, a cold collection cavity, and a housing;

[0008] A solar collector is installed on the air inlet side of the air source unit; the solar collector includes a water tank and an inclined fixing frame, several heat collection tubes are fixed above the inclined fixing frame, a radiative cooling film is below the heat collection tubes, a cooling plate is below the radiative cooling film, and a stiffening plate is below the cooling plate fixed on the inclined fixing frame; a sealed cold collection cavity is below the inclined fixing frame, and the cold collection cavity is positioned facing the air inlet side of the air source unit.

[0009] The cooling chamber consists of a left side plate, condenser fins of the air source unit, and front and rear side plates, with air inlets provided on the side plates.

[0010] The aforementioned radiative cooling film is an integral structure, with a gap of 15–30 mm between the radiative cooling film and the heat collection tube. The radiative cooling film is a spectrally selective reflective film.

[0011] Preferably, the radiative cooling film is configured with a C-shaped or U-shaped structure, and its bottom is covered with a heat collection tube to maximize the reflection of solar energy to the outer surface of the heat collection tube.

[0012] The aforementioned heat collection tubes are arranged in multiple sections, with a gap of 22 to 35 mm between adjacent heat collection tubes. The arc-shaped radiative cooling film within the above gap range reflects the solar radiation heat to the outer wall of the heat collection tube, maximizing the utilization of solar radiation energy per unit area, thereby improving the heat collection efficiency and heat collection capacity of the heat collection tube collector.

[0013] The principle of improving the cooling efficiency (EER) of this utility model is as follows: by utilizing the cooling principle of radiative cooling film, the cooling capacity of the lower-temperature radiative cooling film is transferred to the cold collection cavity through the cooling plate. At the same time, it can effectively reduce the air flowing through the cold collection cavity, reduce the surface temperature of the fins of the air source unit's finned condenser or the inlet air temperature, and further improve the cooling efficiency (EER) value of the air source unit.

[0014] The beneficial effects of the above improvements of this utility model are as follows: By setting a radiative cooling film at the bottom of the collector tube of the collector tube, the solar energy heat radiation in the gap between the collector tube walls is transferred to the collector tube. While the collector tube receives heat radiation, the surface temperature of the cooling plate can be effectively reduced, and the surface temperature of the finned condenser fins or the air inlet temperature of the air source unit can be effectively reduced. At the same time, the cooling efficiency (EER) value of the air source unit can be further improved. The dual improvement of the heat collection capacity of the collector tube and the cooling efficiency (EER) value of the air source unit is achieved, realizing the comprehensive utilization of radiant energy and the purpose of energy saving and environmental protection. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the unit's principle structure according to this utility model.

[0017] Figure 2 This is a top view of the structure of this utility model.

[0018] Figure 3 for Figure 2 Sectional view of AA.

[0019] In the diagram: 1. Solar collector, 11. Collector module base, 12. Collector tube fixing bracket, 13. Collector tube, 14. Rib plate, 15. Column, 16. Solar water inlet, 17. Water tank, 18. Solar water outlet, 19. Left side panel of the cold collection cavity, 2. Radiation cooling film, 3. Cooling plate, 4. Side bracket, 5. Air source unit, 51. Condenser fins, 52. Condenser fan, 53. Unit top panel, 54. Unit right panel, 55. Inlet and outlet water pipes, 56. Unit base, 57. Unit rear panel, 58. Unit front panel, 6. Cold collection cavity, 7. Air inlet, 8. Base plate, 9. Rear side panel of the cold collection cavity, 10. Front side panel of the cold collection cavity, 20. Rivet. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments. The specific structure and molding method of the present invention are shown in the accompanying drawings. Those skilled in the art can make further technical extensions based on the following technology to improve or expand the technical solution. The scope of protection of this patent application is limited to the claims.

[0021] like Figure 1 As shown: A chiller unit based on comprehensive utilization of radiant heat includes a solar collector 1, a radiant cooling film 2, a cooling plate 3, an air source unit 5, a side support 4, a cooling chamber 6, a base plate 8, rivets 20 and other connecting and fixing components; the cooling plate 3 is a thin-walled plate or shaped plate with good heat transfer performance such as aluminum or copper; its design purpose is to achieve uniform and stable heat conduction.

[0022] like Figure 1As shown, the specific connection structure of this utility model is as follows: a base plate 8 is set on the ground, and a heat collection module base 11 and a column 15 are set on the base plate 8. The heat collection module base 11 and the column 15 together realize the inclined support of the heat collection tube fixing frame 12. A side bracket 4 is set on the top of the heat collection tube fixing frame 12, and the water collection tank 17 is supported and fixed by the side bracket 4. Several heat collection tubes 13 are inclinedly inserted into the water collection tank 17, and the heat collection tubes 13 are inclinedly fixed on the heat collection tube fixing frame 12. The air source unit 5 includes condenser fins 51, condenser fan 52, unit top panel 53, unit right panel 54, inlet and outlet water pipes 55, unit base 56, unit rear panel 57, and unit front panel 58. The condenser fins 51 are on the left side of the air source unit 5. The above structures are firmly fixed by rivets 20 and other connecting parts. The condenser fins 51 are oriented towards the cold collection cavity 6.

[0023] The cooling chamber 6 is a spatial region consisting of a base plate 8, a rear side plate 9, a front side plate 10, a left side plate 19, and condenser fins 51 of the air source unit 5. It forms a sealed space on the air intake side of the air source unit 5. This sealed space can operate at a lower temperature and provide air supply conditions for the air source unit 5.

[0024] The solar collector 1 and air source unit 5 mentioned above are both conventional and technologically mature products on the market, and their working principles will not be described in detail here.

[0025] The base plate 8 is connected to the bottom of the heat collection module base 11, the heat collection tube fixing frame 12, and the unit base 56, and is firmly connected by rivets 20 or other connecting parts, forming a stable foundation structure for the equipment.

[0026] The rear side panel 9 of the cooling chamber overlaps with or is an integral structure with the rear panel 57 of the unit, and is firmly connected by rivets 20 or other connectors; the front side panel 10 of the cooling chamber overlaps with or is an integral structure with the front panel 58 of the unit, and is firmly connected by rivets 20 or other connectors.

[0027] Both the rear side plate 9 and the front side plate 10 of the cold collection chamber are equipped with air inlets 7. The opening size of the air inlets 7 is determined according to the air volume of the condenser fan 52 and the average wind speed of the air inlets 7; together with the air source unit 5, they form a stable ventilation structure. The air inlets 7 are equipped with protective structures and accessories such as electric air valves and filters; this can control the airflow entering the air source unit 5 and prevent the intrusion of external foreign objects.

[0028] The upper part of the left side plate 19 of the cooling chamber overlaps with the upper panel 53 of the unit and is firmly connected by rivets 20 or other connecting parts; the left side plate 19 of the cooling chamber is set on the upper inclined surface of the heat collection tube fixing frame 12 of the solar collector 1 and is firmly connected to it by rivets 20 or other connecting parts.

[0029] The radiation cooling film 2 is disposed below the vacuum heat collection tube 13 and attached to the surface of the cooling plate 3; the cooling plate 3 is disposed on the outer surface of the left side plate 19 of the cold collection cavity and is firmly fixed by rivets 20 and other connecting parts.

[0030] Preferably, the radiative cooling film 2 adopts a C-shaped or U-shaped arc-shaped outer covering structure according to the diameter of the heat collection tube 13. This structure can maximize the reflection of solar energy to the outer surface of the heat collection tube 13. The distance between the radiative cooling film 2 and the heat collection tube 13 is determined according to the diameter of the heat collection tube 13 and the tube spacing. It is recommended to be 15-30mm. In the optimal case, the distance between the outer surface of the radiative cooling film 2 and the outer diameter of the heat collection tube 13 is 20mm.

[0031] In this embodiment, the radiation-cooling film 2 is a spectrally selective reflective film, preferably a 50-micron-thick polymer metasurface radiation-cooling (PMRC) film. This type of radiation-cooling film 2 reflects almost all incident sunlight, while reflecting thermal radiation through an atmospheric transparent window. This type of polymer metasurface radiation-cooling (PMRC) film exhibits excellent all-weather cooling performance and can be easily integrated and fixed into various devices.

[0032] A radiative cooling film 2 is attached to the outer surfaces of the rear side panel 9 of the cold collection cavity, the front side panel 10 of the cold collection cavity, the top panel 53 of the unit, the right side panel 54 of the unit, the rear panel 57 of the unit, and the front panel 58 of the unit. Taking the outer surface of the air-cooled modular unit shell with a cooling capacity of 60KW as an example, the cooling capacity of the radiative cooling film 2 is calculated to be about 3KW, and the unit's cooling efficiency can be improved by more than 5%.

[0033] Furthermore, the diameter of the heat collection tube 13 is generally φ57mm, and the tube spacing is 27mm. According to actual tests, the solar radiation energy through the space between the tubes is about 10 to 15% of the total projected area of ​​the solar heat collection tube collector 1. The heat that is irradiated by the radiation cooling film 2 and reflected by the radiation cooling film 2 to the heat collection tube 13 can improve the heat collection efficiency of the solar heat collection tube collector 1 by 10 to 15%.

[0034] This invention provides a radiative cooling film 2 at the bottom of the heat collection tube 13 of the heat collection tube collector 1. This film transfers solar thermal radiation within the gaps in the tube wall of the heat collection tube 13 to the heat collection tube 13. While the heat collection tube 13 receives radiative heat, the surface temperature of the cooling plate 3 is effectively reduced, as well as the surface temperature or inlet air temperature of the finned condenser 5 of the air source unit 5. This can increase the cooling efficiency (EER) of the air source unit 5 by more than 5% and improve the heat collection efficiency of the heat collection tube collector by more than 10-15%. This achieves a dual improvement in the heat collection capacity of the heat collection tube collector 1 and the cooling efficiency (EER) of the air source unit 5.

[0035] This utility model has a reasonable design and simple structure. It integrates and reuses light energy, radiation energy and air energy in a complementary manner, making it energy-saving, environmentally friendly, safe and reliable. It is especially suitable for the comprehensive utilization of clean energy in places such as hotels, restaurants, and bath centers, as well as air conditioning and hot and cold water systems.

Claims

1. A chiller / hot water unit based on comprehensive utilization of radiant heat, characterized in that: It includes solar collectors, radiative cooling films, cooling plates, air source units, cooling chambers, and housings; A solar collector is installed on the air inlet side of the air source unit; the solar collector includes a water tank and an inclined fixing frame, several heat collection tubes are fixed above the inclined fixing frame, a radiative cooling film is below the heat collection tubes, a cooling plate is below the radiative cooling film, and a stiffening plate is below the cooling plate fixed on the inclined fixing frame; a sealed cold collection cavity is below the inclined fixing frame, and the cold collection cavity is positioned facing the air inlet side of the air source unit.

2. A chiller / hot water unit based on comprehensive utilization of radiant heat as described in claim 1, characterized in that: The cooling chamber consists of a left side plate, condenser fins of the air source unit, and front and rear side plates, with air inlets provided on the side plates.

3. A chiller / hot water unit based on comprehensive utilization of radiant heat as described in claim 1, characterized in that: The radiation cooling film is an integral structure, and the gap between the radiation cooling film and the outer wall of the heat collection tube is in the range of 15-30mm.

4. A chiller / hot water unit based on comprehensive utilization of radiant heat as described in claim 1, characterized in that: The aforementioned radiation-cooling thin film is a spectrally selective reflective film.

5. A chiller / hot water unit based on comprehensive utilization of radiant heat as described in claim 4, characterized in that: The aforementioned radiative cooling film adopts a C-shaped or U-shaped structure, with its bottom covered by a heat collection tube to maximize the reflection of solar energy onto the outer surface of the heat collection tube.

6. A chiller / hot water unit based on comprehensive utilization of radiant heat as described in claim 1, characterized in that: The heat collection tubes are arranged in multiple sections, with a gap of 22-35mm between adjacent heat collection tubes.

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