CN2800164Y - Flat plate type solar energy collector for agriculture use - Google Patents

Abstract

The utility model relates to an agricultural plate-type solar heating device which collects solar energy and emits heat in a thermal insulation water tank through a circulating medium to raise the water temperature. It is mainly used in swimming pools, vegetable greenhouses, aquaculture farms and other occasions. It is divided into two parts: the heat preservation water tank and the flat plate heat collection component. The heat release pipe is arranged or spirally made in the heat preservation water tank, and the expansion tank and the automatic exhaust valve are made on the top of the heat release pipe, and the temperature control circulating pump is made in the heat transfer medium circulation circuit. , and connect with the heat absorbing pipe in the flat heat collecting component through the connecting pipe and the connecting piece to form a circulation loop of heat absorbing and exothermic phase exchange, realizing the effect of exchanging solar heat energy with the heat transfer medium, the principle is simple, the installation is convenient, and the thermal efficiency High temperature, good anti-freeze performance, especially suitable for installation of heat preservation water tank and flat plate heat collector components in different places, it is an ideal heat collection equipment for agriculture with large area and less strict supply temperature requirements.

Description

Agricultural flat-plate solar heating device

Technical field:

The utility model relates to an agricultural flat-plate solar heating device which collects sunlight and converts it into heat energy, and then releases heat in a water tank through a circulating heat transfer medium to increase the water temperature. , mainly used in aquaculture, swimming pools, vegetable greenhouses and other occasions that require hot water to raise the temperature.

technical background:

A solar heating device is a device that uses a heat collector to collect solar energy and convert it into heat energy to heat up water and keep it warm. When choosing a solar water heater, two issues are usually concerned: one is thermal efficiency, and the other is installation technology. At present, there are many types of solar water heaters on the market, but they are mainly divided into two types: single type and split assembly type. The single type collects less heat. The position that can be directly exposed; the split assembly type mainly includes hanging type and vertical type. There are also many types of specific structures. Generally, when collecting large-scale solar energy, more split structures are selected, that is, the heat collector and the heat preservation water tank are installed separately. In terms of the form of heating, the existing solar water heaters are mainly divided into two categories: one is to use sunlight to directly irradiate the water surface in the container to heat up the water. This type of solar water heater has a simple structure and intuitive principle, but due to its heat absorption efficiency It has been gradually eliminated due to low thermal conversion rate and other reasons; the other type is commonly used at present, which adopts the structure of heat collector and heat preservation water storage tank, and generally adopts vacuum tube heat collector and flat plate heat collector. Type solar water heaters have poor antifreeze performance and are only suitable for areas south of the Yangtze River that do not freeze in winter, but are not suitable for areas north of the Yangtze River that freeze in winter. Moreover, there is a lack of solar heating equipment for large-area low-temperature heating for agricultural breeding occasions.

Invention content:

In order to achieve the purpose of the invention of the utility model, especially to solve the problems of antifreeze, cost reduction, and ease of processing and installation, the equipment is generally divided into two parts: the heat preservation water tank and the flat plate heat collection assembly, and the heat preservation water tank is divided into pressure-bearing and non-pressure. There are two types. There is a heat release pipe in the heat preservation water tank, and an expansion tank and an automatic exhaust valve are made on the top of the heat release pipe (large-scale hot water supply system can be at the highest point of the circulation loop); a temperature control pump is made in the entire heat transfer medium circulation loop, Its working principle is: use the temperature difference between the supply and return of the heat transfer medium of the flat plate heat collection component, and control the operation of the pump through the electrical system to realize the circulation of the heat transfer medium; It is composed of lighting box, glass plate and other components. The heat-absorbing pipe is installed on the heat-absorbing plate, and the heat-absorbing pipe is filled with a heat transfer medium with good antifreeze performance. The inlet and outlet of the heat-absorbing tube in the flat-plate heat-collecting component are connected with the inlet and outlet of the heat-releasing pipe in the heat preservation water tank through connecting pipes and connectors, forming a heat transfer medium circulation loop in which heat absorption and heat release are connected, and the heat transfer medium can be antifreeze The heat transfer coefficient of oil or oil mixed liquid with good performance should not be lower than that of water. Due to the two-part single structure of the heat-insulating water tank and the flat-plate heat-collecting component, it is convenient to install the heat-insulating water tank and the flat-plate heat-collecting component in an ideal place, especially when multiple sets of flat-plate heat-collecting components are installed in parallel (the circulation loop adopts the same program) to form a large-scale centralized solar energy collection. Heat and hot water supply system, which can supply high temperature hot water in large quantities for farms, aquaculture, swimming pools and other occasions.

Description of drawings:

Fig. 1 is a schematic diagram of the structure principle of the utility model

implementation plan:

When the utility model is implemented, the components of its main structure mainly include: automatic exhaust valve 1, expansion tank 2, heat preservation water tank 3, heat release pipe 4, connector 5, connection pipe 6, heat absorption pipe 7, flat daylighting box 8 , heat absorbing plate 9, temperature control pump 10, heat transfer medium 11, glass plate 12, etc. The automatic exhaust valve 1 and the expansion tank 2 solve the problem that the heat transfer medium expands and shrinks when heated, and its volume change easily makes the circulation circuit form a pressure; the heat preservation water tank 3 can be made into a closed or open tank with various shapes and structures body; the heat release pipe 4, the connector 5, the connecting pipe 6 and the heat absorption pipe 7 are made of metal material, and its thermal conductivity requirement should be higher than that of water. The flat lighting box 8 has good lighting and heat preservation performance; the heat absorbing plate 9 is made of metal material and has good heat absorption and heat conduction performance; the temperature control pump 10 has good sealing performance; the heat transfer medium 11 has antifreeze performance; Good light rate, high strength and other properties.

The flat heat collecting assembly of the present utility model is an integral structure, the flat heat collecting assembly and the heat preservation water tank 3 are butted and communicated through the connecting pipe 6 and the connecting piece 5, forming a heat-absorbing and heat-releasing circuit of the heat transfer medium, and the temperature control pump 10 can be a commercially available finished product , the operation of the pump is controlled by the temperature difference between the supply and return of the heat transfer medium, and a temperature difference value is set arbitrarily in advance. When the temperature difference between the supply and return of the heat transfer medium reaches this value, the pump can run; The heat medium flows smoothly in the circulation loop.

The flat plate heat collecting assembly of the utility model is made into a wall-mounted or vertical type, which is convenient for effective absorption of sunlight, and heat-conducting sheets can be formed on the heat-absorbing pipe 7 and the heat-releasing pipe 4 .

The utility model has no vacuum heat collecting tube for the flat heat collecting assembly, and has no disadvantages such as tube explosion, fouling, and water leakage. The production cost is low, the processing technology is simple, the installation is convenient, the application areas and occasions are wide, the operation is safe and reliable, and the multi-group parallel connection can be widely used in large-scale heating and hot water supply occasions.

Claims (2)

1. agricultural plate type solar heat-collecting device, agent structure has attemperater, heat release pipe, endothermic tube, absorber plate, expansion drum, temperature control pump to combine, it is characterized in that being shaped in the attemperater heat release pipe, the top of heat release pipe is shaped on expansion drum and automatic exhaust steam valve, is shaped on the temperature control pump in the heat transfer medium closed circuit; Endothermic tube is installed on the absorber plate, and the endothermic tube import and export is communicated with heat release pipe import and export in the attemperater by tube connector and connector, forms heat absorption and exothermic phase heat transfer medium closed circuit together.

2. agricultural plate type solar heat-collecting device according to claim 1 is characterized in that oil or oily mictoplasm liquid that the heat transfer medium selection is antifreeze.

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