CN219555801U - Greenhouse heat insulation and preservation enclosure structure - Google Patents

Abstract

The utility model relates to a greenhouse heat insulation and preservation enclosure structure, which comprises an outer light-transmitting enclosure layer arranged at the top of a greenhouse and an inner light-transmitting enclosure layer arranged at the inner side of the outer light-transmitting enclosure layer; an interlayer cavity is formed between the inner light-transmitting protective layer and the outer light-transmitting protective layer; one end of the interlayer cavity, which is positioned at the high position, is provided with a foam generating device; a liquid collecting tank is arranged at one end of the interlayer cavity, which is positioned at the lower part; the inner-layer light-transmitting enclosure layer is arranged above the liquid collecting tank, and the foam generating device comprises a foam generator arranged at one end of the interlayer cavity and a fan arranged at the air inlet side of the foam generator; the foam generator is communicated with the water pump through a liquid outlet pipe; the water pump is arranged in the liquid storage tank; the liquid collecting groove is communicated with the liquid storage tank through a liquid return pipe. The utility model has the characteristics of excellent heat insulation, heat preservation and light transmission effects, low input cost and low operation energy consumption.

Description

Greenhouse heat insulation and preservation enclosure structure

Technical Field

The utility model relates to the technical field of agricultural planting and breeding, in particular to a greenhouse heat-insulation and heat-preservation enclosure structure.

Background

In order to overcome the adverse effect of extreme climate such as high temperature in summer and severe cold in winter on the control of the temperature of the internal environment of the greenhouse, various technical cooling heating and heat insulation measures such as thickened heat insulation cotton heat insulation, an inner and outer sunshade net cooling system, a wet curtain fan, a heat insulation cover, heating/cooling of an electric compressor and the like are adopted. These measures either do not achieve a more optimal heat insulation effect, or have high investment costs, or have high energy consumption or influence light transmission and lighting. If building materials with good heat preservation effect are adopted to strengthen the heat insulation and preservation effect of greenhouse enclosing structures, such as polyurethane foaming plates, double-layer thickened polyethylene heat preservation plates, LOW multilayer heat insulation reflective glass and the like, the enclosing structures have certain heat insulation and temperature reduction and preservation effects, but the lighting of the greenhouse is influenced in daytime, the manufacturing cost is too high to be easily popularized and applied on a large scale; all-glass or all-plastic film greenhouse solves the lighting problem, but has the problems of shading, heat insulation, heat preservation and the like, and needs to be matched with cooling and heat insulation measures such as an inner shading net system, a wet curtain fan, a heat preservation quilt and the like. Especially, the heat insulation performance of the light-transmitting greenhouse film which occupies the heat dissipation area of the greenhouse enclosure structure is poor, the temperature fluctuation in the sunlight direct-injection greenhouse in the daytime is large, and the heat dissipation capacity at night is large. In winter, for the heat preservation in the greenhouse, a layer of heat preservation and insulation layers such as a layer of heat preservation felt cotton quilt grass curtain and the like are covered outside the greenhouse film at night; meanwhile, the heat-insulating cotton quilt with good heat insulation has the advantages of low manufacturing cost, poor heat-insulating effect after water absorption, easy decay, short service life, inconvenient operation, and the like, and is required to be matched with a greenhouse roller shutter mechanical motor operating system.

The transparent greenhouse film is almost in a transmission state in summer sunlight, so that the temperature inside the greenhouse is high due to the greenhouse effect, and the greenhouse film is unfavorable for maintaining the environment in the greenhouse for production and life to meet the requirements of seed culture. In order to cool the interior of the greenhouse in summer, cooling measures such as inner and outer sunshade nets, spray water mist evaporation cooling, fan water curtains, air replacement, spray cooling agents, spray mud, air conditioning refrigeration and the like are generally adopted, and although burning of plant animals in the greenhouse due to direct sunlight is relieved to a certain extent, a certain cooling effect is also achieved, the cooling range is limited in hot weather, and the environment temperature, humidity and illumination intensity required by growth of most crop animals can not be met. In summer, in order to achieve the aim of cooling in the greenhouse, most of the measures need to be 'battle array' at the same time, a plurality of negative problems on the growth of crops and animals are exposed in engineering practice, and the sun-shading area is too strong, so that direct sunlight can be avoided, but the illumination intensity is influenced, and the photosynthesis of plants is not facilitated; the fan temperature curtain is cooled by means of evaporation heat absorption of water, and is affected by the dew point temperature of air, so that the humidity in the greenhouse is easily increased, plant transpiration is affected, and the probability of plant diseases and insect pests is increased; the CO2 gas fertilizer concentration favorable for photosynthesis is not diluted by a large amount of ventilation.

The cooling agent is sprayed on the outer surface of the greenhouse film, the spraying concentration is not easy to control, the thickness of the light-reflecting film layer with light-reflecting rate and light-transmitting rate formed after spraying is thin and not easy to control, and the contradiction between the illumination intensity change and the sunlight transmission intensity meeting the photosynthesis of plants is difficult to meet in summer. The coating of the cooling agent has poor quality and is easy to be washed by rain water and needs to be sprayed again, or the coating is difficult to be degraded and needs to be changed film. The cooling cost of the air conditioning equipment by the compressor is too high, and the air conditioning equipment is not easy to popularize.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the enclosure structure with the soap liquid foam layer dynamically filled in the interlayer space formed by the greenhouse double-layer film structure, which utilizes a physical method and a principle mechanism to ensure that the greenhouse enclosure structure has the effects of heat insulation and temperature reduction in summer, heat preservation in winter and light transmittance, and has low input cost and low operation energy consumption.

In order to achieve the aim of the technical problems, the technical scheme adopted by the utility model is as follows:

a greenhouse heat insulation and preservation enclosure structure comprises an outer light-transmitting enclosure layer arranged at the top of a greenhouse and an inner light-transmitting enclosure layer arranged at the inner side of the outer light-transmitting enclosure layer;

an interlayer cavity is formed between the inner light-transmitting protective layer and the outer light-transmitting protective layer; one end of the interlayer cavity, which is positioned at the high position, is provided with a foam generating device;

a liquid collecting tank is arranged at one end of the interlayer cavity, which is positioned at the lower part;

and a grid mesh of a return style is arranged above the inner-layer light-transmitting enclosure layer and the liquid collecting tank.

Further, the foam generating device comprises a foam generator arranged at one end of the interlayer cavity and a fan arranged at the air inlet side of the foam generator;

the foam generator is communicated with the water pump through a liquid outlet pipe;

the water pump is arranged in the liquid storage tank;

the liquid collecting groove is communicated with the liquid storage tank through a liquid return pipe.

Furthermore, the foam generator, the negative pressure cabin enclosing structure and the fan enclose a negative pressure cabin, and a negative pressure cabin grid air return opening is arranged below the negative pressure cabin.

Further, the interlayer cavity is internally provided with partition films at intervals, the partition films divide the interlayer cavity into more than two partition cavity units, one end of each partition cavity unit, which is positioned at a high position, is provided with a foam generating device, and one end of each partition cavity unit, which is positioned at a low position, is provided with a liquid collecting tank.

Further, the foam generating device comprises a foam generator arranged at the high end of the partitioned cavity unit and a fan arranged at the air inlet side of the foam generator.

The beneficial effects of adopting above-mentioned technical scheme to produce lie in:

in view of the problems of technical defects, investment, economy in use and the like of various technical means of heat insulation, heat preservation and cooling of the traditional greenhouse at present, the enclosure structure of the greenhouse adopts a double-layer film interlayer form, a small soap liquid foam layer (water mist film can be sprayed) with a certain thickness is dynamically filled, the effects of cooling, heat insulation and light transmission are achieved, the temperature control and illumination of the environment in the greenhouse are achieved by means of a physical principle mechanism, and the defects of the prior art in economic and technical measures are effectively overcome.

The utility model discloses a greenhouse enclosure structure, which adopts an interlayer film hollow cavity to dynamically fill a soap solution foam structure and a mechanism to form a heat-insulating, heat-preserving and light-transmitting enclosure structure layer, in particular to a greenhouse enclosure hollow structure formed by adopting a double-layer film, wherein no dead angle is formed in the double-layer film hollow interlayer, and the light-transmitting, heat-insulating and soap solution foam layer is dynamically filled to form the light-transmitting, heat-preserving and heat-insulating greenhouse heat-insulating structure and the mechanism. The interlayer film hollow cavity is divided into a plurality of relatively independent partition cavity units by the partition film, soap liquid foam is dynamically filled into the relatively independent partition cavity units through the foam generator, the soap liquid is formed after the foam is broken and flows back to the liquid collecting tank again, and the regenerated foam is dynamically filled again through circulation of the foam generator, a fan, a water pump and the like after the foam in the interlayer film is broken. In a word, the inside of the hollow cavity units of a plurality of partitions which are relatively closed continuously and dynamically is formed by a fan, a water pump, a liquid collecting tank, a foam liquid reflux device, a foam generator and the like, and the soap liquid foam is filled in the hollow cavity units of the interlayer, so that a relatively stable, heat-insulating and light-permeable soap liquid foam heat-insulating layer is always kept in the layer within a certain time, the light scattered by the light-permeable soap liquid foam part, the diffracted light and the like can meet the photosynthesis illumination intensity of plants, the direct irradiation of sunlight to the interior of a greenhouse in summer is reduced, and the heat-insulating and cooling effects are obvious; when no soap solution bubbles are filled, water mist and water films can be sprayed into the interlayer space for cooling. The transparent heat-insulating light-permeable enclosure structure in the winter double-layer film is beneficial to direct sunlight heat accumulation of the winter greenhouse; the sandwich-filled foam heat insulation and heat preservation coefficient is high, the heat exchange inside and outside the greenhouse can be effectively isolated at night in winter, the heat preservation effect of the excellent light-transmitting heat insulation soap lye foam layer is far better than that of the traditional greenhouse enclosure structure, and the sandwich film hollow cavity of the greenhouse adopted by the utility model is filled with the soap lye foam heat insulation and heat preservation layer.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic top view of the present utility model;

FIG. 3 is a schematic side view of a cavity of the sandwich of the present utility model;

FIG. 4 is an enlarged schematic view of the structure of the portion A of the present utility model;

FIG. 5 is an enlarged view of the structure of the portion B of the present utility model;

wherein, 1, an interlayer cavity, 101, an outer light-transmitting protective layer, 102, an inner light-transmitting protective layer, 103 and a return air grid net, 104, a negative pressure cabin grid return air inlet, 2, a foam generator, 201, a fan, 202 and a soap solution foam layer; 3. the liquid collecting tank comprises a liquid collecting tank body 301, a liquid return pipe 302, a liquid outlet pipe 303, a liquid storage tank body 304, soap liquid, 4, a partition cavity unit 401, a partition membrane, 5, a water pump, 6, a negative pressure cabin enclosing structure and 7, a negative pressure cabin.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-5, the embodiment provides a greenhouse heat insulation and preservation enclosure structure, which comprises an outer light-transmitting enclosure layer 101 arranged on a greenhouse and an inner light-transmitting enclosure layer 102 arranged on the inner side of the outer light-transmitting enclosure layer 101; the inner light-transmitting protective layer 102 and the outer light-transmitting protective layer 101 are separated by a certain interval to form a greenhouse enclosing structure with an interlayer cavity 1. The outer light-transmitting protective layer 101 and the inner light-transmitting protective layer 102 can be transparent greenhouse envelope layers such as high polymer plastic films, light-transmitting polyester carbonate plates, glass and the like; a plurality of partition films 401 are arranged in the interlayer cavity 1; the interlayer cavity 1 is divided into a plurality of relatively sealed partition cavity units 4 by the outer light-transmitting protective layer 101, the inner light-transmitting protective layer 102 and the partition film 401; a foam generator 2 and a fan 201 arranged on the air inlet side of the air inlet duct of the foam generator 2 are arranged at one end of the partition cavity unit 4 or in the air duct thereof. A liquid collecting tank 3 is arranged at one end of the interlayer cavity 1, which is positioned at the lower part; the inner light-transmitting protective layer 102 is arranged above the liquid collecting tank 3 and is provided with a back style grid mesh 103, and the foam generating device comprises a foam generator 2 arranged at one end of the partition cavity unit 4 or in the air channel and a fan 201 arranged at the air inlet side in the air inlet channel of the foam generator 2. The foam generator 2 is communicated with the water pump 5 through a liquid outlet pipe 302; the water pump 5 is arranged in the liquid collecting tank 3; the liquid collecting tank 3 is communicated with the liquid storage tank 303 through a liquid return pipe 301, a plurality of liquid collecting tanks 3 are arranged at the lowest part of an interlayer space formed by the double-layer transparent film, and a plurality of transparent heat-insulating soap liquid foam layers 202 in the interlayer cavity 1 are broken to form soap liquid 304 which flows back into the liquid collecting tank 3 along the inner surfaces of the outer transparent protective layer 101 and the inner transparent protective layer 102 under the action of gravity; a low or underground liquid storage tank 303 is arranged inside the greenhouse; the liquid level of the liquid storage tank 303 is lower than the liquid level of the water collecting tank 3 and is connected with each other through a liquid return pipe 301; after the foam of the soap solution breaks, the formed liquid soap solution 304 flows back into the liquid collecting tank 3; soap 304 flows back into the reservoir 303 by gravity through the return tube 301 for storage.

In view of the problems of technical defects, investment, economy in use and the like of various technical means of heat insulation, heat preservation and temperature reduction of the traditional greenhouse at present, the utility model adopts the envelope formed by a mechanism of dynamically filling the heat insulation translucent soap liquid foam layer 202 by the double-layer film interlayer, achieves the effects of heat insulation, heat preservation and light transmittance, and can realize the purposes of controlling the environmental temperature and illumination in the greenhouse with low energy consumption and low cost by using the envelope and the mechanism per se, thereby effectively overcoming the economic and technical defects of the prior art.

The foam generators 2 and the negative pressure cabin enclosing structure 6 enclose a negative pressure cabin 7, a negative pressure cabin grid air return port 104 is arranged on the lower side (or other geometric surfaces) of the negative pressure cabin 7, a plurality of foam generators 2, fans 201 and the negative pressure cabin enclosing structure 6 are arranged in a plurality of partition cavity units 4 to form a relatively sealed negative pressure cabin 7, and a negative pressure cabin grid air return port 104 is arranged on one surface, such as the bottom or other geometric surfaces, of the negative pressure cabin 7; the negative pressure cabin grid return air inlet 104 is communicated with the air in the greenhouse inner space, a plurality of partition films 401 are arranged in the outer light-transmitting protective layer 101 and the inner light-transmitting protective layer 102, and the outer light-transmitting protective layer 101, the inner light-transmitting protective layer 102 and the partition films 401 form a plurality of relatively closed partition cavity units 4.

Each group of foam generators 2 corresponds to each partition cavity unit 4, and forms a relatively closed partition cavity unit 4 in the interlayer space without dead angle in the outer light-transmitting protective layer 101 and the inner light-transmitting protective layer 102 to be filled with soap foam. A grid mesh 103 of a return style is arranged at the bottom of the inner light-transmitting protective layer 102 facing the inner space direction of the greenhouse; other enclosure structures of the greenhouse, such as a liquid collecting tank 3 at the bottom, a water pump 5 in a liquid storage tank 303, a negative pressure cabin enclosure structure 6, a foam generator 2, a fan 201, a partition hollow cavity unit 4, a partition membrane 401 and the like, form a circulating soap foam generation system and a liquid soap reflux system, form a relatively closed interlayer foam layer enclosure structure of the greenhouse by dynamically and continuously filling the soap foam, and have the functions of heat preservation, heat insulation and light transmission.

The utility model adopts an enclosure structure and a mechanism of an interlayer film hollow cavity dynamic filling foam heat-insulating light-permeable heat-insulating greenhouse, in particular to a greenhouse enclosure hollow structure formed by double-layer films, wherein a dead angle-free dynamic filling heat-insulating soap liquid foam layer is arranged in the double-layer film hollow interlayer, so that the light-permeable, heat-insulating and heat-insulating greenhouse heat-insulating structure and the mechanism are formed. The interlayer film hollow cavity is divided into a plurality of relatively independent partition cavity units by the partition film, soap liquid foam is dynamically filled in the relatively independent partition cavity units through the foam generator, and after the foam is broken, a mechanism of replenishing the foam into the interlayer space again through the foam generating system is adopted. In a word, constitute and maintain adiabatic printing opacity foam layer through fan, water pump, collecting tank, foam liquid backward flow, foam generator etc. and make the intermediate layer in keeping relatively stable soap lye foam heat preservation structure all the time. The scattered light, the diffracted light and the like passing through the light-permeable soap solution foam part meet the illumination intensity of photosynthesis of plants, the direct irradiation of sunlight in summer to the interior of the greenhouse is reduced, and the heat insulation and cooling effects are obvious; and when no soap solution bubbles are filled, water mist or water film can be sprayed into the interlayer space to form a cooling and light-transmitting structure and mechanism. The whole double-layer film is positioned in the transparent enclosure structure in winter, which is beneficial to direct sunlight heat accumulation and formation of an inner film heat radiation layer in winter greenhouse; the sandwich layer filled foam heat insulation coefficient is high, the heat exchange inside and outside the greenhouse can be effectively isolated at night in winter, and the excellent heat insulation effect of the light-permeable heat insulation soap liquid foam layer is far better than that of the traditional greenhouse enclosure structure. According to the utility model, the soap liquid foam heat insulation layer and the mechanism are dynamically filled in the hollow cavity of the greenhouse interlayer film, and the mechanism of the enclosure structure has excellent heat insulation, heat preservation and light transmittance effects. Low cost input, almost zero energy consumption, long service life and the like.

The specific working process and principle are as follows:

the heat insulation layer of soap liquid foam is generated after the air flow tissue of the air outlets of the fans 201 passes through the foam generators 2, and the soap liquid foam is continuously and dynamically filled in an interlayer space 1 and a partition cavity unit 4 formed by the outer light-transmitting protective layer 101 and the inner light-transmitting protective layer 102; the soap solution foam in the interlayer cavity 1 and the partition cavity unit 4 is continuously blown out from the foam generator 2 by positive pressure of the fan 201, air in the extrusion interlayer space is forced to flow in the relatively closed interlayer space, the air flows back to the relatively closed space in the greenhouse through the air return grid 103, the air in the greenhouse flows through the negative pressure cabin 7 and the negative pressure cabin grid air return port 104 under the operation of the fan 201, and then is blown into the foam generator 2 after being pressurized by the fan 201 to generate new soap solution foam, the interlayer space 1 is continuously and dynamically filled, the partition cavity unit 4, the outer light-transmitting protective layer 101 and the inner light-transmitting protective layer 102 form the interlayer space 1, the fan 201 and the water pump 5 are simultaneously started, and the manufactured light-transmitting heat-preserving heat-insulating layer is continuously and circularly and dynamically filled in the interlayer space. As for the expression of adopting a plurality of fans 201, a plurality of foam generators 2, the thickness of an interlayer space and the like, the bubble filling operation of a plurality of areas is completed by adopting a plurality of sets of systems according to the factors such as the scale, the size, the area, the bubble blowing capability and the like of the greenhouse.

The soap solution is a stock solution which is similar to the liquid detergent, liquid laundry detergent, water, glycerin and the like mixed and blended in a certain proportion to form foam. The surface tension of innumerable tiny soap lye foam acts, so that the existence of a foam layer in an interlayer space can be maintained for a certain time; innumerable fine bubbles are connected with each other through the foam itself because of the surface tension liquid film, and the air packed inside the bubbles is not communicated with each other and can transmit light. Because of the existence of numerous small soap bubbles in the interlayer space after filling the foam, a certain time is required for single foam to break, the broken soap bubbles become soap liquid to flow back to the liquid storage tank 303 again, the soap liquid is pressurized by the water pump 5 and is sent to the foam generator 2 again, and the foam is blown out again by the fan 201. The intermittent operation mode of the blower 201 and the water pump 5 completes the regeneration process after foam rupture; or spray water mist or water film to cool down. The fan 201 and the water pump 5 synchronously work to complete the regeneration process of the soap foam, the power of the used equipment is low, the intermittent operation time is short, and the soap is recycled, so that the energy is saved.

Under the operation action of the foam generator 2, the water pump 5 and the fan 201, innumerable soap bubbles can be filled into the interlayer space of the double-layer film and the interlayer space of the partitioned cavity unit like a waterfall, and a thick foam heat insulation layer enclosure structure is formed at the periphery of the greenhouse; due to the surface tension of the foam, the foam is kept relatively stable for a certain period of time, and becomes liquid soap droplets after being broken, and flows into the liquid collecting tank 3 and the liquid storage tank 303 by gravity, and is pressurized to the foam generator 2 by the water pump 5, so that new foam is regenerated. After the foam breaks, the mechanism for replenishing the soap foam is recycled. In summary, foam is dynamically replenished into the sandwich cavity 1 with continuous gaps of the foam generator 2 to maintain the foam layer in the sandwich layer at all times. Because the innumerable soap foams have small volume and large quantity, the middle parts of the single foam films are connected with each other, the air which can convect and exchange heat in the double-layer interlayer is bound by innumerable foam films, and a foam layer structure is formed that the innumerable foam films are adjacent, but the wrapped air is not communicated with each other, so that the convect and heat transfer of the air in the interlayer is effectively inhibited; because the hollow interlayer has a certain thickness (the thickness of the interlayer is determined according to the different sizes of the greenhouse scale), innumerable connected foam films form a heat bridge with poor heat conduction effect, and heat is difficult to conduct between the inner protective layer and the outer protective layer; because soap vacuole bubble layer itself possesses light transmissivity, after the sunlight was led through the light transmissivity foam layer of certain thickness, take place complicated light refraction, diffraction, scattering, reflection of light process, avoided sunlight to direct in to the canopy, sunlight is led through foam layer filtration and becomes diffuse soft visible light, wherein ultraviolet ray and thermal effect's infrared light just can filter, other light can pass through can satisfy plant photosynthesis's needs, most infrared light ultraviolet ray is filtered by the foam reflection, unnecessary heat entering greenhouse has been reduced from the source.

The inner and outer protective layers are made of light-transmitting materials, and soap liquid foam in the protective layers has small heat storage capacity under the irradiation of sunlight and cannot cause temperature rise. The temperature difference of the inner and outer protective layers exists, and the outer light-transmitting protective layer has a certain temperature rise in the daytime in summer, but the temperature rise of the inner and outer protective layers is limited due to the comprehensive influence of various factors such as continuous rupture and regeneration of foam water components, foam thickness and the like, so that strong heat radiation benefit is difficult to form in the greenhouse. The envelope structure form of the foam layer is filled in the double-layer enclosing layer of the greenhouse, and the conduction, convection and radiation heat transfer and conduction processes are effectively inhibited, so that the heat transfer inside and outside the greenhouse is minimized. The hollow inner filling foam layer of the inner and outer double-layer enclosing layers with low cost and light transmittance is used for forming the heat-insulating, heat-preserving and light-transmittance enclosing structure and mechanism, so that heat transfer inside and outside the greenhouse is effectively inhibited, and the heat-insulating, heat-preserving and light-transmittance effects of the greenhouse enclosing structure are effectively enhanced. The temperature reduction, heat preservation and heat insulation can also meet the photosynthesis requirement of plants. And when the temperature is too low at night in winter, the thick foam layer forms the building envelope to keep warm and has excellent effect, and the effect greatly exceeds the heat insulation effect of common covering, and is incomparable with the heat insulation quilt only.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. The greenhouse heat insulation and preservation enclosure structure is characterized by comprising an outer light-transmitting enclosure layer (101) arranged at the top of a greenhouse and an inner light-transmitting enclosure layer (102) arranged at the inner side of the outer light-transmitting enclosure layer (101);

an interlayer cavity (1) is formed between the inner light-transmitting protective layer (102) and the outer light-transmitting protective layer (101); one end of the interlayer cavity (1) positioned at the high position is provided with a foam generating device;

a liquid collecting tank (3) is arranged at one end of the interlayer cavity (1) positioned at the lower part;

the inner light-transmitting protective layer (102) is arranged above the liquid collecting tank (3) and is provided with a grid (103) of a return style.

2. The greenhouse heat insulation and preservation building enclosure according to claim 1 is characterized in that the foam generating device comprises a foam generator (2) arranged at one end of the interlayer cavity (1) and a fan (201) arranged on the air inlet side of the foam generator (2);

the foam generator (2) is communicated with the water pump through a liquid outlet pipe (302);

the water pump (5) is arranged in the liquid storage tank (303);

the liquid collecting groove (3) is communicated with the liquid storage tank (303) through a liquid return pipe (301).

3. The greenhouse heat insulation and preservation building enclosure according to claim 2, wherein the foam generator (2), the negative pressure cabin building enclosure (6) and the fan (201) enclose a negative pressure cabin (7), and a negative pressure cabin grid air return opening (104) is arranged below the negative pressure cabin (7).

4. The greenhouse heat insulation and preservation building enclosure according to claim 1 is characterized in that partition films (401) are arranged in the interlayer cavity (1) at intervals, the partition films (401) divide the interlayer cavity (1) into more than two partition cavity units (4), a foam generating device is arranged at one end of each partition cavity unit (4) located at a high position, and a liquid collecting tank (3) is arranged at one end of each partition cavity unit (4) located at a low position.

5. The greenhouse heat insulation building enclosure according to claim 4, wherein the foam generating device comprises a foam generator (2) arranged at the high end of the partitioned cavity unit (4) and a fan (201) arranged on the air inlet side of the foam generator (2).