Solar heat collection and dissipation device for greenhouse

Abstract

The utility model discloses a solar heat collecting and dissipating device for a greenhouse, which relates to the technical field of greenhouse accessories and comprises an outer film body with an outer cavity, a water inlet and a water outlet, the water inlet and the water outlet are connected at two ends of the outer film body and communicated with the outer cavity, an inner film body is connected in the outer cavity and the water inlet, and an inner cavity is formed between the inner film body and the inner wall of the outer film body. Non-equal-diameter water distribution holes communicated with the outer cavity are formed in the inner cavity, and the inner wall of the outer cavity is further coated with a hydrophilic coating. Compared with the prior art, the solar heat collecting and dissipating device for the greenhouse has the advantages that the solar heat collecting and dissipating device for the greenhouse is low in cost and applicable to greenhouse scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a greenhouse technical field, specifically point to a kind of solar heat collector for greenhouse. BACKGROUND

[0002] The main heating methods of current traditional agricultural greenhouse are coal-fired hot blast furnace, burning straw, gas boiler and electric heating wire, and these traditional heating methods have high energy consumption, serious pollution, large greenhouse gas emissions and low energy efficiency.

[0003] Therefore, solar heat collectors are used, but the existing solar heat collectors on the market are not strong enough in specificity for greenhouse use. When used for greenhouse heating and refrigeration, they all have a series of technical defects such as occupying a large area inside and outside the greenhouse, high cost, low heat collection and dispersion efficiency, not having dehumidification function, and being unable to be used in greenhouse without back slope. UTILITY MODEL CONTENT

[0004] (I) Problem to be solved

[0005] The technical problem to be solved by the utility model is to provide a solar heat collector for greenhouse with low cost application and suitable for greenhouse scene.

[0006] (II) Technical solution

[0007] To solve the above technical problems, the technical solution provided by the utility model is a solar heat collector for greenhouse, which comprises an outer membrane body with an outer cavity and a water inlet and a water outlet connected to the outer cavity at both ends of the outer membrane body, an inner membrane body connected to the water inlet in the outer cavity, an inner chamber formed between the inner membrane body and the inner wall of the outer membrane body, a non-equal-diameter water distribution hole communicated with the outer cavity on the inner chamber, and a hydrophilic coating coated on the inner wall of the outer cavity.

[0008] As an improvement, the water inlet is connected to the upper part of the outer membrane body, and the water outlet is connected to the lower part of the outer membrane body, and the top end of the outer membrane body is further provided with a plurality of hollow rings for mounting.

[0009] As an improvement, the non-equal-diameter water distribution hole is provided with two groups along the length direction of the inner membrane body, and the included angle of the two groups of non-equal-diameter water distribution holes is 0-60°.

[0010] As an improvement, the hole diameter of the non-equal-diameter water distribution hole gradually increases from the water inlet to the direction away from the water inlet.

[0011] As an improvement, the outer membrane body is a transparent plastic film.

[0012] (III) Beneficial effects

[0013] The utility model has the advantages that compared with the prior art, the technical scheme of the utility model has the advantages of simple installation, low cost, high heat collection and dispersion power, and dehumidification function, effectively increases the heat collection and dispersion area and heat collection and dispersion amount, and basically does not affect the photosynthesis of plants in the greenhouse when used in the north-south direction greenhouse and the continuous greenhouse.

[0014] The transparent plastic film is used to effectively utilize solar energy, and compared with the existing inner container of the flat-plate solar collector, the heat collection and dispersion efficiency is higher, and compared with the existing vacuum tube solar collector, the heat dispersion function and the dehumidification function are additionally provided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of a greenhouse solar heat collector.

[0016] Figure 2 It is Figure 1 An enlarged structure schematic view of A part in the figure.

[0017] As shown in the figure: 1, water inlet; 2, water outlet; 3, outer membrane body; 4, hollow ring; 5, non-equal-diameter water distribution hole; 6, inner membrane body; 7, outer cavity. DETAILED DESCRIPTION

[0018] The specific embodiments of the utility model will be further described in combination with the drawings. Wherein the same parts are indicated by the same reference numerals.

[0019] It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0020] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can be a centering element, and when an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a centering element, and the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs, and the terms used in the specification of the utility model are for the purpose of describing specific embodiments and are not intended to limit the utility model, and the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] In order to make the content of the utility model more easily be clearly understood, the following will combine the drawings in the utility model embodiment, clearly and completely describe the technical scheme in the utility model embodiment.

[0023] Please refer to the attached drawings Figures 1-2 A greenhouse solar heat collector and radiator, comprising an outer membrane body 3 with an outer cavity 7, and a water inlet 1 and a water outlet 2 connected to the outer membrane body 3 at both ends and communicating with the outer cavity, an inner membrane body 6 connected with the water inlet 1 in the outer cavity 7, an inner cavity formed between the inner membrane body 6 and the inner wall of the outer membrane body 3, a non-equal-diameter water distribution hole 5 communicating with the outer cavity 7 on the inner cavity, and the outer membrane body 3 being a transparent plastic film. The inner wall of the outer cavity 7 is also coated with a hydrophilic coating.

[0024] The water inlet 1 is connected to the upper part of the outer membrane body 3, and the water outlet 2 is connected to the lower part of the outer membrane body 3. The top end of the outer membrane body 3 is also connected with a plurality of hollow rings 4 for installation. The non-equal-diameter water distribution hole 5 is provided with two groups along the length direction of the inner membrane body 6, and the included angle of the two groups of non-equal-diameter water distribution holes 5 is 0-60. In order to ensure the use of the heat collector and radiator, the hole diameter of the non-equal-diameter water distribution hole 5 gradually increases from the water inlet to the direction away from the water inlet.

[0025] In the specific implementation, the solar heat collector and radiator of the present application can be connected in parallel and hung on the water distribution main pipe hung on the greenhouse framework during use (the weight of the water distribution main pipe, the heat collector and radiator, the connecting pipe and the hanging clasp per meter is not more than 5 kg during system operation, the existing greenhouse framework does not need to be reinforced for installation, and the weight of the water distribution main pipe, the heat collector and radiator, the connecting pipe and the hanging clasp per meter is not more than 1 kg in the non-working state of the system). The water inlet and the water distribution main pipe are connected by a quick socket valve, the water outlet of the heat collector and radiator is connected with a water distribution cross (the vertical port connects the heat collector outlet, and the horizontal port connects the condensed water flowing down the plastic film), and the connection is installed by clamping (which can automatically stretch and contract to cope with the stretchability of the plastic film and the stress generated by the swing of the film during ventilation, and the tension of the lower connecting pipe naturally settled), and the replacement is simple.

[0026] During use, the existing mode of secondary conduction for heating by the solar heat collector is abandoned, and a mode of direct heating of the water body in the film by the sun is adopted, so that the heat collection efficiency is higher; during heat dissipation, the water body radiation heat dissipation is increased, and the heat dissipation efficiency of the inner tank of the traditional heating radiator and the flat-plate solar heat collector is higher, so that the ultra-low temperature heating becomes a reality. The outer cavity is coated with a hydrophilic agent, which increases the dispersion of water on the film surface, so that the heat exchange efficiency is higher, and the non-equal-diameter small holes on the inner cavity are designed to make the water flow distribution more uniform.

[0027] During installation and use, the hollow ring on the outer cavity, the hanging line, and the design of the water inlet and outlet make the installation and replacement of the heat collector and radiator extremely simple, and non-professional water and electricity workers can also complete it.

[0028] Principle:

[0029] Heat collection: After the sun comes out in the daytime, the air temperature in the shed reaches the set temperature, and the circulating pump used in cooperation is started. The water is sent into the inner cavity of the collector from the water inlet at the top of the collector. The water distribution holes on the inner cavity uniformly send the water into the outer cavity of the collector. The water entering the outer cavity flows down along the inner wall of the outer cavity of the collector under the action of gravity, flows out from the water outlet of the collector, and flows back to the water tank through the pipeline connected thereto. In this process, the water in the collector absorbs the heat of the solar radiation to its surface; when the temperature of the water flowing through the collector is lower than the temperature of the air in the shed, the film of the outer cavity of the collector absorbs the heat in the air in the shed and conducts the heat to the water flowing through the collector; when the temperature of the water flowing through the collector is lower than the dew point temperature of the water molecules in the air in the shed, the water molecules in the air will condense on the surface of the collector to form water droplets, which flow back to the soil in the shed, thereby achieving the function of dehumidifying the greenhouse, and releasing heat to the water flowing through the collector.

[0030] Heat dissipation: When the air temperature in the shed is lower than the set temperature at night, the circulating pump used in cooperation is started. The water is sent into the inner cavity of the collector from the water inlet at the top of the collector. The water distribution holes on the inner cavity uniformly send the water into the outer cavity of the collector. The water entering the outer cavity flows down along the inner wall of the outer cavity of the collector under the action of gravity, flows out from the water outlet of the collector, and flows back to the water tank through the pipeline connected thereto. In this process, the water flowing through the collector will radiate heat to the air in the shed and the surrounding structure through the transparent film of the outer cavity of the collector, and at the same time, the water flowing through the collector will also conduct part of the heat to the transparent film of the outer cavity of the collector, and then radiate and convect to the air in the shed through the transparent film of the outer cavity of the collector.

[0031] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0032] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings. The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology. The circuit connection adopts the conventional connection mode in the existing technology, which will not be described in detail here. The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0033] The above has described the utility model and its implementation mode, which is not restrictive, and the drawings only show one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. A solar collector and disper for a greenhouse, characterized by: The outer membrane body with an outer cavity, a water inlet and a water outlet connected to the outer membrane body and communicated with the outer cavity, an inner membrane body connected with the water inlet in the outer cavity, an inner chamber formed between the inner membrane body and the inner wall of the outer membrane body, a plurality of non-equal-diameter water distribution holes communicated with the outer cavity on the inner chamber, and a hydrophilic coating coated on the inner wall of the outer cavity.

2. The solar collector-disperser for a greenhouse according to claim 1, characterized in that: The water inlet is connected to the upper part of the outer membrane body, the water outlet is connected to the lower part of the outer membrane body, and the top end of the outer membrane body is further provided with a plurality of hollow rings for mounting the outer membrane body.

3. The solar collector-disperser for use in a greenhouse according to claim 1, characterized in that: The two groups of non-equal-diameter water distribution holes are arranged along the length direction of the inner membrane body, and the included angle of the two groups of non-equal-diameter water distribution holes is 0-60°.

4. The solar collector-disperser for use in a greenhouse according to claim 3, characterized in that: The diameter of the non-equal-diameter water distribution hole gradually increases from the water inlet to the direction away from the water inlet.

5. The solar collector-disperser for use in a greenhouse according to any of claims 1-4, characterized in that: The outer membrane body is a transparent plastic film.

Images