CN102696431A

CN102696431A - Thermal insulation material for greenhouse

Info

Publication number: CN102696431A
Application number: CN2012101913516A
Authority: CN
Inventors: 刘立功; 刘超; 刘新明; 王俊英; 丁发强; 刘建芳
Original assignee: 刘立功
Priority date: 2012-06-12
Filing date: 2012-06-12
Publication date: 2012-10-03

Abstract

The invention relates to a thermal insulation material for a greenhouse. The thermal insulation material comprises unit bodies; each unit body comprises an adsorbing layer closest to the interior of the greenhouse, a middle thermal insulating layer and a reflecting layer at the outermost side; the adsorbing layer is dark; the thermal insulating layer is transparent; and the reflecting surface of the reflecting layer faces the direction of the greenhouse. The three functional layers can also reflect back thermal radiation reaching the reflecting layer apart from being capable of reflecting thermal radiation and obstructing heat conduction; and the thermal radiation is adsorbed by the adsorbing layer again after passing through the thermal insulating layer, and the luminous energy is converted into heat energy again. Due to the effect, on the one hand, the thermal radiation which is originally outwards scattered is totally reflected back, and on the other hand, the temperature of the radiation adsorbing layer is increased, and the temperature difference between the radiation adsorbing layer and a thermal insulation target is reduced, thereby reducing the rate of head conduction of the thermal insulation target toward a thermal insulation object.

Description

Insulation material is used in a kind of greenhouse

Technical field

The present invention relates to a kind of greenhouse technology that is used for agriculture growing vegetables, relate in particular to the insulation material that uses on the agricultural greenhouse by solar heat.

Background technology

In the plantation of northerly winter vegetable, modal is the greenhouse, is divided into the greenhouse by solar heat of three use cob walls and does not use the shed of cob wall.The greenhouse relies on solar radiation and transparent insulation material that the temperature in the greenhouse was reached about 30 degree even higher in winter daytime; For the lighting effect that obtains; The very thin transparent membrane of the general employing of daylighting face; Daylighting face can not play the effect of thermal isolation and heat storage in this case, and a lot of heats simultaneously will constantly scatter and disappear.Do not have evening after the solar radiation; If only use transparent insulation material; Heat runs off can be very fast, causes day and night excessive temperature differentials, influences existence and the growth of crops; So the greenhouse must use the insulation material of better heat preservation at night, but these insulation materials are less demanding to transparency.Be incubated on the transparent heat insulating material that originally mostly the greenhouse night insulation is simply to use straw mat, nonwoven etc. to cover the greenhouse; Rise along with these material prices; Someone begins to attempt using chemical material to be incubated; Like EPE, EPE compound reflecting film, foamed rubber-plastic, air-cushion film etc., but only be extensive original use, the characteristics to the greenhouse do not design; Heat insulation effect and material service efficiency all will be low a lot, what the present invention will solve is exactly a kind of insulation material of characteristics specialized designs according to the greenhouse.

Stop heat to run off, will try every possible means to cut off conduction, convection current and three kinds of approach of radiation of heat propagation exactly, in these three kinds of approach, convection current is stopped the most easily.Just stop heat conduction, best yes vacuum, other material commonly used has air, chemical fibre, native fiber, expanded material, pottery etc.; Just stop thermal radiation, material commonly used has reflecting materials such as metal or alloy such as mercury minute surface, aluminium, white lining.Strictly speaking, except that vacuum, these materials all have the function that stops heat conduction and thermal radiation two aspects simultaneously.These materials are as when insulation, because the difference that insulation requires, difference is very big on cost and structure, have with the single material of one deck, the multiple material of use multilayer that has, or repetition is arranged.But without exception be, it all is that high temperature one side direction low temperature one side from the insulation thing is carried out that heat is transmitted, thermal radiation too.And even used the design of reflective thermal radiation, nearly high temperature one side is outwards run off by the thermal radiation that insulation thing self also can produce again, and these regeneration radiation are important channels of heat-energy losses during existing heat preservation technology is used.

Summary of the invention

The present invention is mainly used in the insulation of agricultural facility, can improve heat insulation effect, practices thrift insulation material, carry out INSULATION DESIGN more flexibly.The technical problem that the present invention will solve is to use a kind of insulation material of better effects if, improve the greenhouse especially night the greenhouse the thermal isolation and heat storage ability.

The invention provides the insulation material that a kind of greenhouse is used; Insulation material is made up of cell cube; Each cell cube is by forming near the absorbed layer of inside, greenhouse, middle thermal insulation layer and outermost reflecting layer; Described absorbed layer is dark, and described thermal insulation layer is transparent, and the reflecting surface in said reflecting layer is direction towards the greenhouse.Between each unit, between each functional layer the space can be arranged, can not have yet, perhaps change the space state as required at any time.Three functional layers except can reflective thermal radiation, stop the heat conduction, also have the thermal radiation that arrives the reflecting layer toward back reflective, pass the septum pellucidum thermosphere after; Be absorbed radiating layer and reuptake, these luminous energy are converted into heat energy again, this makes that on the one hand the thermal radiation that should outwards scatter and disappear all is reflected; On the other hand; Improved the temperature that absorbs radiating layer, reduced itself and the temperature difference that is incubated target, thereby slowed down the speed of insulation target to insulation thing conduction heat.The invention enables scattering and disappearing of heat almost can not carry out, and can only slowly carry out with heat conducting form with thermal-radiating form.

Three functional layers are indispensable, and level can not be upset, otherwise the thermal radiation that prevention insulation target that just can not be good produces produces the thermal radiation that produces once more with insulation thing self and outwards scatters and disappears.The effect in reflecting layer is the regeneration radiation reflection internal layer of self-heat conserving structure internal layer in the future, and the effect of absorbed layer is to utilize these radiation to improve self temperature, thereby improves heat insulation effect.

Preferably, said thermal insulation layer uses transparent EPE material, and aluminum foil material is used in said reflecting layer, and said absorbed layer uses black woven or black thin film.Wherein, thermal insulation layer is that 2-10mm is best with thickness, and the color of radiation absorption layer is black more dense more good more, and the septum pellucidum thermosphere requires heat-proof quality good, and transparency is high more good more simultaneously, and the reflecting rate in reflecting layer is high more good more, can select material as required.

Wherein, use edge heat seal or comprehensive heat seal process to be superimposed in attractable layer, thermal insulation layer and reflecting layer, use a plurality of cell cubes to be connected to form one deck insulation material, perhaps a plurality of cell cubes stacks form multilayer insulants.Because the material that three functional layers are selected for use can both produce cohesive after seeing heat, so after three functional layers are placed in order, use heat seal process to carry out edge heat seal or heat seal comprehensively, process facility is required low, simple to operate, implement convenient rapid.And the material of making like this can roll or gather into folds easily, is convenient to folding and unfolding.

Preferably, internal direction is painted with white or highly reflective to said absorbed layer towards the greenhouse.Can also increase an independent reflecting layer or thermal insulation layer or absorbed layer in the inboard or the outside of total as required, play a protective role simultaneously.

Beneficial effect

The present invention can obtain following technique effect:

Make that on the one hand the thermal radiation that should outwards scatter and disappear all is reflected, on the other hand, improved the temperature of absorbed layer, reduced itself and the temperature difference that is incubated target, thereby slowed down the speed of insulation target to insulation thing conduction heat.The invention enables scattering and disappearing of heat almost can not carry out, and can only slowly carry out, realized extraordinary heat insulation effect with lower cost with heat conducting form with thermal-radiating form.Experiment showed, that under identical heat insulation effect the amount ratio prior art of its insulation material of the present invention reduces 21%.

Description of drawings

Fig. 1,

Mark among the figure: 1, reflecting layer, 2, thermal insulation layer, 3, the reflecting layer

Embodiment

Insulation material is used in the greenhouse of present embodiment; Form by cell cube; As shown in Figure 1, near forming in the absorbed layer in greenhouse, middle thermal insulation layer and outermost reflecting layer, described absorbed layer is dark to each cell cube by; Described thermal insulation layer is transparent, and the reflecting surface in said reflecting layer is direction towards the greenhouse.In the present embodiment; Aluminum foil material is used in the reflecting layer, and the thermal insulation layer used thickness is the transparent EPE material of 2mm, and absorbed layer uses the black woven cloth; The three uses edge heat seal or comprehensive heat seal process to be superimposed; The insulation material of making like this can be rolled or stack by day, and spread out night, very easy to use.

In another embodiment; Aluminum foil material is used in the reflecting layer; The thermal insulation layer used thickness is the transparent EPE material of 10mm; Absorbed layer uses the double-colored film of black and white to be made into a kind of insulation material, and the white face of the double-colored film of black and white has so just increased the reflecting surface of a white towards the insulation target in high temperature one side of a construction unit.

Claims

1. insulation material is used in a greenhouse; Form by cell cube; Each cell cube is by forming near the absorbed layer of inside, greenhouse, middle thermal insulation layer and outermost reflecting layer; It is characterized in that: described absorbed layer is for dark, and described thermal insulation layer is transparent, and the reflecting surface in said reflecting layer is direction towards the greenhouse.

2. insulation material is used in greenhouse as claimed in claim 1, it is characterized in that: said thermal insulation layer uses transparent EPE material, and aluminum foil material or white lining are used in said reflecting layer, and said absorbed layer uses black woven cloth or black thin film.

3. insulation material is used in greenhouse as claimed in claim 2; It is characterized in that: use edge heat seal or comprehensive heat seal process to be superimposed in attractable layer, thermal insulation layer and reflecting layer; Use a plurality of cell cubes to be connected to form one deck insulation material, perhaps a plurality of cell cube stacks form multilayer insulant.

4. use insulation material like claim 1,2 or 3 described greenhouses, it is characterized in that: internal direction is painted with white to said absorbed layer towards the greenhouse.

5. use insulation material like claim 1,2 or 3 described greenhouses, it is characterized in that: the thickness of thermal insulation layer is 1-10mm.