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

Abstract

The invention 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] The invention relates to the technical field of comprehensive utilization of clean energy, and in particular to a hot and cold water unit for comprehensive utilization of solar radiation heat. Background Art

[0002] In the thermal utilization of solar water heaters, the key is to convert the sun's radiation energy into thermal energy. The collector is a key part of various solar energy utilization devices. Most of the existing solar collectors on the market currently use collector tubes and flat-plate solar collector structures. Although solar collectors absorb heat quickly and have high efficiency, they are affected by factors such as the outer diameter of the collector tube and the installation and operation space. A gap of 22 to 35 mm needs to be reserved between the walls of the collector tubes, resulting in a low utilization rate of solar radiation heat within the unit area of ​​illumination.

[0003] Air source units are widely used in small and medium-sized hotels, restaurants, bathing centers and other places due to their convenient installation and economy. In parts of Jiangnan and Northwest China, when the outdoor temperature is higher than 40°C, the fins of the finned condenser of the air source chiller have too high a surface temperature due to long-term exposure to sunlight and are prone to frequent high-pressure alarm failures during cooling conditions, resulting in reduced refrigeration efficiency of the unit or even failure to operate normally.

[0004] As a developer, manufacturer and construction unit in the field of clean energy, an important issue that usually needs to be solved is to achieve the effective extraction, storage and comprehensive utilization of solar energy heat, so as to ensure the safe, stable and efficient operation of solar collector hot water and air source cold (hot) water system, whether in hot summer or cold winter.

[0005] In view of the functional characteristics described above, the technical problem that needs to be solved at present is: how to design a hot and cold water unit through technical improvement, which can improve the heat collection efficiency and combine functions such as energy storage, heat dissipation of the condenser fin surface temperature or reduction of the fin inlet temperature, so as to solve the technical problems of low heat collection efficiency in summer and low energy efficiency of air source water heaters. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a hot and cold water unit based on the comprehensive utilization of radiation heat. By arranging a radiation cooling film and a cooling plate at the bottom of the heat collecting tube of the heat collecting tube collector, the radiation cooling film can effectively reflect all the sunlight reflected by it to space or the surface of the heat collecting tube, and reduce the surface temperature of the film to below the ambient temperature through radiation heat exchange; while the heat collecting tube obtains thermal radiation heat, the surface temperature of the cooling plate can be effectively reduced, and the surface temperature of the condenser fin of the air source unit or the inlet air temperature can be effectively reduced, and the cooling efficiency EER value of the air source unit can be further improved.

[0007] To achieve the above technical objectives, the present invention adopts the following technical solutions: a hot and cold water unit based on comprehensive utilization of radiation heat, which includes a solar collector, a radiation cooling film, a cooling plate, an air source unit, a cold collecting cavity, and a box; A solar collector is arranged on the air inlet side of the air source unit; the solar collector includes a water tank and an inclined fixing frame, a plurality of heat collecting tubes are fixed above the inclined fixing frame, a radiation cooling film is arranged below the heat collecting tubes, a cooling plate is arranged below the radiation cooling film, a rib plate fixed on the inclined fixing frame is arranged below the cooling plate; a cold collecting cavity with a sealed structure is arranged below the inclined fixing frame toward the air inlet side of the air source unit.

[0008] The cold collecting chamber is composed of a left side plate of the cold collecting chamber, condenser fins of the air source unit, and front and rear side plates, and the side plates are provided with air inlets.

[0009] The radiation cooling film is an integrated structure, and the gap between the radiation cooling film and the heat collecting tube is in the range of 15 to 30 mm. The radiation cooling film is a spectrally selective reflection film.

[0010] Preferably, the radiation cooling film is arranged in a C-shaped or U-shaped structure, and its bottom is arranged to cover the heat collecting tube to reflect the solar energy to the outer wall surface of the heat collecting tube to the maximum extent.

[0011] The heat collecting tubes are arranged in multiple pieces, and a gap of 22 to 35 mm is set between adjacent heat collecting tubes. The arc-shaped radiation cooling film within the above gap reflects the solar radiation heat on the outer wall of the heat collecting tube, and maximizes the use of solar radiation energy per unit area to improve the heat collection efficiency and the amount of heat collected by the heat collecting tube collector.

[0012] The principle of improving the refrigeration efficiency EER of the present invention is: using the radiation refrigeration film refrigeration principle, the cold energy of the radiation refrigeration film with a lower temperature is transferred to the cold collecting cavity through the cooling plate, and at the same time, the air flowing through the cold collecting cavity can be effectively reduced, the surface temperature of the fins of the fin-type condenser of the air source unit or the inlet air temperature can be reduced, and the refrigeration efficiency EER value of the air source unit can be further improved.

[0013] The beneficial effects of the present invention after the above improvements are as follows: by arranging a radiation cooling film at the bottom of the heat collecting tube of the heat collecting tube collector, the solar energy heat radiation in the gap between the tube walls of the heat collecting tube is transferred to the heat collecting tube, and while the heat collecting tube obtains heat radiation, the surface temperature of the cooling plate can be effectively reduced, and the surface temperature of the fin of the fin-type condenser of the air source unit or the air inlet temperature can be effectively reduced, and at the same time, the cooling efficiency EER value of the air source unit can be further improved; the collection amount of the heat collecting tube collector and the cooling efficiency EER value of the air source unit are both improved, so as to achieve the purpose of comprehensive utilization of radiation energy and energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the principle structure of the unit of the present invention.

[0016] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0017] Figure 3 for Figure 2 Middle AA section view.

[0018] In the figure: 1. solar collector, 11. collector module base, 12. collector tube fixing frame, 13. collector tube, 14. rib plate, 15. column, 16. solar water inlet, 17. water collecting tank, 18. solar water outlet, 19. left side plate of cold collecting chamber, 2. radiation cooling film, 3. cooling plate, 4. side bracket, 5. air source unit, 51. condenser fin, 52. condensing fan, 53. upper panel of unit, 54. right panel of unit, 55. inlet and outlet water pipes, 56. unit base, 57. rear panel of unit, 58. front panel of unit, 6. cold collecting chamber, 7. air inlet, 8. bottom plate, 9. rear side plate of cold collecting chamber, 10. front side plate of cold collecting chamber, 20. rivet. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with 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 technologies to achieve technical improvement or expansion of the technical solution. The protection scope of this patent application is limited only to the claims.

[0020] like Figure 1 As shown: a hot and cold water unit based on the comprehensive utilization of radiation heat, which includes a solar collector 1, a radiation cooling film 2, a cooling plate 3, an air source unit 5, a side bracket 4, a cold collecting cavity 6, a bottom plate 8, rivets 20 and other connecting and fixing parts; the cooling plate 3 is a thin-walled plate or a molded plate with good heat transfer performance such as aluminum and copper; its design purpose is to achieve uniform and stable heat conduction.

[0021] like Figure 1As shown, the specific connection structure of the present invention is that a bottom plate 8 is arranged on the ground surface, and a heat collecting module base 11 and a column 15 are arranged on the bottom plate 8, and the heat collecting module base 11 and the column 15 are used to realize the inclined support of the heat collecting tube fixing frame 12. A side bracket 4 is arranged on the top of the heat collecting tube fixing frame 12, and the side bracket 4 is used to realize the support and fixation of the water collecting box 17. A plurality of heat collecting tubes 13 are obliquely plugged on the water collecting box 17, and the heat collecting tubes 13 are obliquely fixed on the heat collecting tube fixing frame 12. The air source unit 5 includes a condenser fin 51, a condensing fan 52, an upper panel 53 of the unit, a right panel 54 of the unit, an inlet and outlet water pipe 55, a unit base 56, a rear panel 57 of the unit, and a front panel 58 of the unit. The left side of the air source unit 5 is a condenser fin 51, and the above structure is firmly fixed by connecting parts such as rivets 20. The condenser fin 51 is arranged toward the cold collecting cavity 6.

[0022] The cold collecting chamber 6 is a space area composed of a bottom plate 8, a rear side plate 9, a front side plate 10, a left side plate 19, and a condenser fin 51 of the air source unit 5, which forms a closed space on the air inlet side of the air source unit 5. This closed space can operate at a lower temperature and provide air supply conditions for the air source unit 5.

[0023] The solar thermal collector 1 and air source unit 5 are conventional and mature products in the market, and their working principles are not described in detail here.

[0024] The bottom plate 8 is overlapped and connected with the heat collecting module base 11, the bottom of the heat collecting tube fixing frame 12, and the unit base 56, and is firmly connected by rivets 20 or other connecting parts, forming a stable basic structure for the equipment.

[0025] The cold collecting chamber rear side plate 9 is overlapped with the unit rear panel 57 or is an integral structure, and is firmly connected by rivets 20 or other connecting parts; the cold collecting chamber front side plate 10 is overlapped with the unit front panel 58 or is an integral structure, and is firmly connected by rivets 20 or other connecting parts.

[0026] The air inlet 7 is provided on the rear side plate 9 and the front side plate 10 of the cold collecting chamber. The opening size of the air inlet 7 is determined according to the air volume of the condensing fan 52 and the average wind speed of the air inlet 7. It forms a stable ventilation structure with the air source unit 5. The air inlet 7 is provided with protective structures and accessories such as an electric air valve and a filter screen. The air volume entering the air source unit 5 can be controlled, and the intrusion of foreign objects from the outside can be prevented.

[0027] The upper part of the left side plate 19 of the cold collecting chamber is overlapped and connected to 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 cold collecting chamber is arranged on the upper inclined surface of the heat collecting tube fixing frame 12 of the solar collector 1, and is firmly connected thereto by rivets 20 or other connecting parts.

[0028] The radiation cooling film 2 is arranged below the vacuum heat collecting tube 13 and attached to the surface of the cooling plate 3; the cooling plate 3 is arranged on the outer surface of the left side plate 19 of the cold collecting chamber and is firmly fixed by other connecting parts such as rivets 20.

[0029] Preferably, the radiation cooling film 2 adopts an arc-shaped outer covering structure such as a C-shape or a U-shape according to the diameter of the heat collecting tube 13. This structure can reflect the solar energy to the outer wall surface of the heat collecting tube 13 to the maximum extent; the spacing between the radiation cooling film 2 and the heat collecting tube 13 is determined according to the diameter of the heat collecting tube 13 and the size of the tube spacing, and it is recommended to be 15 to 30 mm. In the optimal case, the distance between the outer surface of the radiation cooling film 2 and the outer diameter of the heat collecting tube 13 is 20 mm.

[0030] In this embodiment, the radiative cooling film 2 is a spectrally selective reflective film, and a 50-micron thick polymer metasurface radiative cooling (PMRC) film is preferably used. This radiative cooling film 2 reflects almost all incident sunlight and reflects thermal radiation in the atmospheric transparent window. This polymer metasurface radiative cooling (PMRC) film exhibits excellent all-weather cooling performance and can be easily integrated and fixed to various devices.

[0031] The outer surfaces of the cold collecting chamber rear side plate 9, the cold collecting chamber front side plate 10, the unit upper panel 53, the unit right panel 54, the unit rear panel 57, and the unit front panel 58 are pasted with a radiation cooling film 2. Taking the outer surface of the unit shell of an air-cooled module unit with a cooling capacity of 60KW as an example, the cooling capacity of the radiation cooling film 2 is about 3KW, and the unit refrigeration efficiency can be increased by more than 5%.

[0032] Furthermore, the diameter of the heat collecting tube 13 is generally φ57mm, and the tube spacing is 27mm. After actual testing, the solar radiation energy passing through the tube spacing space is approximately 10-15% of the total projected area of ​​the solar heat collecting tube collector 1; the heat reflected to the heat collecting tube 13 by the radiation cooling film 2 after being irradiated by the radiation cooling film 2 can improve the heat collection efficiency of the solar heat collecting tube collector 1 by 10-15%.

[0033] The present invention arranges a radiation cooling film 2 at the bottom of the heat collecting tube 13 of the heat collecting tube collector 1, and transmits the solar thermal radiation in the gap between the tube walls of the heat collecting tube 13 to the heat collecting tube 13. While the heat collecting tube 13 obtains the heat of thermal radiation, the surface temperature of the cooling plate 3 can be effectively reduced, and the surface temperature of the fins of the fin-type condenser 5 of the air source unit 5 or the air inlet temperature can be effectively reduced, so that the cooling efficiency EER value of the air source unit 5 can be increased by more than 5%, and the heat collection efficiency of the heat collecting tube collector can be increased by more than 10-15%; the collection amount of the heat collecting tube collector 1 and the cooling efficiency EER value of the air source unit 5 are both improved.

[0034] The present invention has a reasonable design and a simple structure. It can comprehensively and complementary reuse light energy, radiation energy and air energy, and is energy-saving, environmentally friendly, safe and reliable. It is particularly suitable for the comprehensive utilization of clean energy and air conditioning, hot and cold water systems in hotels, restaurants, bathing centers and other places.

Claims

1. A hot and cold water unit based on comprehensive utilization of radiant heat, characterized in that: It includes a solar collector, a radiation cooling film, a cooling plate, an air source unit, a cooling chamber, and a box; A solar collector is arranged on the air inlet side of the air source unit; the solar collector comprises a water tank and an inclined fixing frame, a plurality of heat collecting tubes are fixed on the upper part of the inclined fixing frame, a radiation cooling film is arranged below the heat collecting tube, a cooling plate is arranged below the radiation cooling film, and a rib plate fixed on the inclined fixing frame is arranged below the cooling plate; a sealing cold collecting cavity is arranged below the inclined fixing frame, and the cold collecting cavity is arranged toward the air inlet side of the air source unit; the radiation cooling film is arranged as an integrated structure, and a gap between the radiation cooling film and the outer wall of the heat collecting tube is 15 to 30 mm; the radiation cooling film is arranged as an integrated structure, and a gap between the radiation cooling film and the outer wall of the heat collecting tube is in the range of 15 to 30 mm; the radiation cooling film adopts a C-type or U-type structure, and its bottom is arranged to cover the heat collecting tube to maximize the reflection of solar energy to the outer wall surface of the heat collecting tube.

2. A hot and cold water unit based on comprehensive utilization of radiant heat as claimed in claim 1, characterized in that: The cold collecting chamber is composed of a left side plate of the cold collecting chamber, condenser fins of the air source unit, and front and rear side plates, and the side plates are provided with air inlets.

3. A hot and cold water unit based on comprehensive utilization of radiant heat as claimed in claim 1, characterized in that: The radiation cooling film is a spectrally selective reflection film.

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