阅读说明：本技术 一种高效节能型温室 (High-efficient energy-saving greenhouse ) 是由 田学书 于 2021-09-09 设计创作，主要内容包括：本发明涉及温室大棚技术领域,具体涉及一种高效节能型温室,包括温室主体、设置在温室主体内部的三层水平的保温幕和正压通风系统以及设置在温室主体顶部的通风窗,温室主体包括四周的复合保温墙体、顶部不对称的弧形拱架以及设置在温室内部的桁架梁,正压通风降温系统包括湿帘装置、正压风机和通风管,三层水平的保温幕、正压通风系统和通风窗之间相互配合以实现对温室内部进行快速的通风、降温或保温,利于促进作物的生长,同时又能节能减排,提高温室的建造面积。本发明可解决传统温室存在的湿帘通风系统耗能高且限制温室建造面积、温室内部降温效果不佳、通风不畅、温室墙体保温性不好、温室顶部通风窗设计不合理等技术问题。(The invention relates to the technical field of greenhouses, in particular to a high-efficiency energy-saving greenhouse, which comprises a greenhouse main body, three horizontal heat-insulating curtains and a positive-pressure ventilation system which are arranged inside the greenhouse main body, and a ventilation window arranged at the top of the greenhouse main body, wherein the greenhouse main body comprises a peripheral composite heat-insulating wall body, an arc arch truss girder with an asymmetric top and a truss girder arranged inside the greenhouse, the positive-pressure ventilation and cooling system comprises a wet curtain device, a positive-pressure fan and a ventilation pipe, and the three horizontal heat-insulating curtains, the positive-pressure ventilation system and the ventilation window are mutually matched to realize quick ventilation, cooling or heat preservation inside the greenhouse, so that the growth of crops is promoted, energy conservation and emission reduction can be realized, and the construction area of the greenhouse is increased. The invention can solve the technical problems that the wet curtain ventilation system in the traditional greenhouse has high energy consumption and limits the building area of the greenhouse, the cooling effect in the greenhouse is poor, the ventilation is not smooth, the heat insulation performance of the wall body of the greenhouse is poor, the ventilation window at the top of the greenhouse is unreasonable in design and the like.)

1. The utility model provides a high-efficient energy-saving greenhouse, a serial communication port, including greenhouse main part (1), set up at inside three-layer horizontally heat preservation curtain (2) and malleation ventilation system (3) of greenhouse main part (1) and set up ventilation window (4) at greenhouse main part (1) top, greenhouse main part (1) is including compound thermal insulation wall (11) all around, asymmetric arc bow member (12) in top and set up truss girder (13) inside the greenhouse, malleation ventilation cooling system (3) are including damp curtain device (31), malleation fan (32) and ventilation pipe (33), mutually support between heat preservation curtain (2), malleation ventilation system (3) and ventilation window (4) in order to realize ventilating, cooling or heat preservation inside the greenhouse.

2. The high-efficiency energy-saving greenhouse as claimed in claim 1, wherein the heat-insulating curtain (2) comprises a first heat-insulating curtain (21), a second heat-insulating curtain (22) and a third heat-insulating curtain (23), the first heat-insulating curtain (21) adopts a climate curtain with 80% of light transmittance and 45% of energy saving rate, the second heat-insulating curtain (22) adopts a climate curtain with 55% of light transmittance and 70% of energy saving rate, and the third heat-insulating curtain (23) adopts a climate curtain with 85% of light transmittance and energy saving rate.

3. An efficient and energy-saving greenhouse as claimed in claim 2, wherein the first insulating curtain (21), the second insulating curtain (22) and the third insulating curtain (23) are installed at heights of 2.8 meters, 4.6 meters and 5.2 meters from the ground respectively.

4. A high efficiency and energy saving type greenhouse according to claim 2, characterized in that one side of the greenhouse body (1) is provided with an air intake area (14), the air inlet area (14) is positioned between the first layer of heat preservation curtain (21) and the third layer of heat preservation curtain (23), an air inlet (15) is arranged on one side of the air inlet area (14), the outer side of the air inlet (15) is sequentially covered with an insect-proof net (5) and a rolling film (6) from inside to outside, the wet curtain device (31) is arranged on the inner side of the air inlet (15) and covers the air inlet (15), the positive pressure fan (32) is arranged at the opposite position of the other side of the air inlet area (14) and the wet curtain device (31), the air inlet of positive pressure fan (32) communicates air inlet district (14), and the air outlet communicates ventilation pipe (33), ventilation pipe (33) communicate planting district (16) inside the greenhouse.

5. The high-efficiency energy-saving greenhouse as claimed in claim 4, wherein the wall of the ventilation pipe (33) is provided with a plurality of ventilation holes (34), the ventilation pipe (33) is internally communicated with a plurality of groups of first circulating fans (7), and a second circulating fan (8) communicated with the planting area (16) is arranged above the greenhouse main body (1).

6. An efficient and energy-saving greenhouse as claimed in claim 1, wherein the arc-shaped arch (12) comprises a long arch (121) on the windward side and a short arch (122) on the leeward side, the ventilation window (4) is vertically arranged above the short arch (122), the ventilation window (4) comprises an arc-shaped window top (41) and a vertical window body (42), the window top (41) is connected with the long arch (121) and has the same shape as the long arch, a ventilation opening (43) is formed in one side of the window body (42) facing the leeward side, and the ventilation opening (43) is sequentially covered with the insect-proof net (5) and the rolling film (6) from inside to outside.

7. The high-efficiency energy-saving type greenhouse as claimed in claim 6, wherein the long arch (121) and the short arch (122) are of an upper and lower chord truss structure, and the elevation angle of the short arch (122) is 30-80 degrees.

8. The efficient energy-saving greenhouse as claimed in claim 1, wherein a heat-insulating sealing bag (9) is arranged at the connecting position of the heat-insulating curtain (2) and the composite heat-insulating wall (11), the bottom end of the heat-insulating sealing bag (9) is fixed on the composite heat-insulating wall (11), the top end of the heat-insulating sealing bag is connected with the truss girder (13), an included angle smaller than 70 degrees is formed between the heat-insulating sealing bag (9) and the composite heat-insulating wall (11), the drooping end of the heat-insulating curtain (2) at the lower layer is connected with the tail end of the heat-insulating sealing bag (9), and the drooping end of the heat-insulating curtain (2) at the upper layer is drooping above the heat-insulating sealing bag (9).

9. The efficient energy-saving greenhouse as claimed in claim 1, wherein the composite heat insulation wall (11) comprises an inner layer heat insulation film (111), a section steel upright post (112), a rubber and plastic heat insulation board (113) and an outer layer heat insulation film (114) which are connected in sequence and parallel to each other, the bottom of the section steel upright post (112) is fixedly installed inside a water-retaining brick wall (115) on the ground, the bottom of the rubber and plastic heat insulation board (113) abuts against the water-retaining brick wall (115), and the bottom ends of the inner layer heat insulation film (111) and the outer layer heat insulation film (114) are both covered outside the water-retaining brick wall (115).

10. The efficient energy-saving greenhouse as claimed in claim 9, wherein the inner layer heat-insulating film (111) and the outer layer heat-insulating film (114) both adopt aluminized films with a thickness of 100-200 μm, and the rubber-plastic heat-insulating plate (113) adopts rubber-plastic materials made of rubber and polyvinyl chloride.

Technical Field

The invention relates to the technical field of greenhouses, in particular to a high-efficiency energy-saving greenhouse.

Background

With the rapid development of greenhouse technology, the application of multi-span greenhouses which are beneficial to energy conservation and yield increase is more and more common. The influence of environment and greenhouse self structure, the environment regulation and control ability of the multi-span greenhouse in most areas is poor, the greenhouse needs to be insulated or heated in winter and at night, the greenhouse needs to be ventilated and cooled when the temperature is too high in summer, the photosynthesis and respiration rate of crops in the greenhouse are improved by regulating and controlling the temperature, humidity and illumination in the greenhouse, and the air quality of the greenhouse is improved so as to meet the requirements of the crops in different growth periods.

A traditional greenhouse usually adopts a wet curtain negative pressure fan cooling system to ventilate and cool the greenhouse, however, when the system is in operation, cold and wet air entering the greenhouse has temperature gradient in the air flow direction, so that the temperature in the greenhouse is not uniformly adjusted, the plant growth in the greenhouse is influenced, and the negative pressure fan has low working efficiency and high energy consumption, so that the construction length of the greenhouse is limited. In the common greenhouse, the thickness of a brick-soil mixed building wall of the greenhouse is increased or heating equipment is adopted to heat the interior of the greenhouse when the greenhouse is insulated, so that the floor area is large, the energy consumption is high, and the construction and operation costs are high; there is also the mode that adopts inside the greenhouse to set up interior heat preservation curtain, but the space that exists between interior heat preservation curtain and the greenhouse skeleton, between the interior heat preservation curtain tip leads to the heat to scatter and disappear, makes its heat preservation effect reduce. In addition, most of the existing common greenhouses are provided with windows at the windward side of the top, and natural wind on the windward side is utilized for ventilation, so that the wind resistance at the top of the greenhouse is increased, the plastic film covering the ventilation opening is prone to water holding and damage and aging, the insect-proof net at the ventilation opening is prone to blocking to influence the ventilation effect, the maintenance cost is increased, and the normal growth of crops in the greenhouse is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the high-efficiency energy-saving greenhouse, the three layers of horizontal heat-insulating curtains in the greenhouse, the ventilation system of the wet curtain positive pressure fan and the ventilation window at the top of the greenhouse are mutually matched, so that the rapid ventilation, cooling or heat insulation and other operations can be carried out in the greenhouse, the growth of crops in the greenhouse is promoted, meanwhile, the energy conservation and emission reduction can be realized, the cost is reduced, the building area and the wind resistance of the greenhouse are improved, and the greenhouse is suitable for building and using the multi-span greenhouse with larger area. The invention can effectively solve a plurality of technical problems of the traditional greenhouse, such as high energy consumption of the ventilation system of the wet curtain negative pressure fan, limitation of the building area of the greenhouse, unreasonable design of the ventilation window at the top of the greenhouse, poor cooling and ventilation effects inside the greenhouse, poor heat insulation performance of the wall body of the greenhouse, influence on the growth of crops due to uneven temperature distribution inside the greenhouse, and the like.

In order to solve the technical problem, the technical scheme of the invention is realized by the following modes:

the utility model provides a high-efficient energy-saving greenhouse, includes the greenhouse main part, sets up at the inside three-layer horizontally heat preservation curtain and malleation ventilation system of greenhouse main part and sets up the ventilation window at greenhouse main part top, the greenhouse main part includes compound heat preservation wall body all around, asymmetric arc bow member in top and sets up the truss roof beam in greenhouse inside, malleation ventilation cooling system includes wet curtain device, malleation fan and ventilation pipe, mutually support between heat preservation curtain, malleation ventilation system and the ventilation window in order to realize ventilating, cooling or keeping warm greenhouse inside.

Further, the heat preservation curtain includes first layer heat preservation curtain, second floor heat preservation curtain and third layer heat preservation curtain, first layer heat preservation curtain adopts the luminousness to be 80%, and the energy saving rate is 45%'s climate curtain, second floor heat preservation curtain adopts the luminousness to be 55%, and the energy saving rate is 70%'s climate curtain, third layer heat preservation curtain adopts opaque, the energy saving rate is 85% climate curtain. The three layers of heat preservation curtains are switched according to different use requirements, the growth requirements of crops on temperature and illumination in different periods are met, the cooling space in the greenhouse can be reduced as much as possible by matching with a positive pressure ventilation system, and the purposes of energy conservation and emission reduction are achieved.

Furthermore, the installation heights of the first layer of heat-preservation curtain, the second layer of heat-preservation curtain and the third layer of heat-preservation curtain from the ground are respectively 2.8 meters, 4.6 meters and 5.2 meters.

Further, one side of greenhouse main part is provided with the air inlet district, the air inlet district is located between first layer heat preservation curtain and the third layer heat preservation curtain the air intake is seted up to one side in air inlet district, the outside of air intake has covered fly net and roll up the membrane from inside to outside in proper order, wet curtain device sets up the inboard and the cover of air intake the opposite side in air inlet district with the relative position of wet curtain device sets up the malleation fan, the air intake intercommunication of malleation fan the air inlet district, air outlet intercommunication the ventilation pipe, ventilation pipe intercommunication greenhouse inside kind of plant district. Through above-mentioned technical scheme, adjust the size of air intake air inlet volume through the switching condition of the book membrane of control air inlet department, the air of operation malleation fan with greenhouse main part outside inhales the air inlet district after the cooling of wet curtain device simultaneously, inhales everywhere to the greenhouse inside in the ventilation pipe by malleation fan malleation, reaches the purpose of rapid cooling taking a breath, sets up simultaneously that the insect-proof net can avoid outside harmful insect to get into the greenhouse inside, influences crop growth.

Furthermore, a plurality of vent holes are formed in the pipe wall of the vent pipe, a plurality of groups of first circulating fans are communicated with the interior of the vent pipe, and a second circulating fan communicated with the planting area is installed above the greenhouse main body. Through this technical scheme, can accelerate the exchange and the circulation of the inside air in greenhouse, make everywhere temperature and humidity keep unanimous in the greenhouse, improve the greenhouse cooling rate, avoid influencing the growth of plant because of the temperature inequality in the greenhouse.

Further, the arc bow member is including the long bow member that is located the windward side and the short bow member that is located the leeward side, the ventilation window sets up perpendicularly the top of short bow member, the ventilation window includes curved window top and vertical window body, the window top with long bow member links to each other and is the same rather than the shape, the vent is seted up towards one side of leeward side to the window body, vent department has from inside to outside covered in proper order and has insect-proof net and roll up the membrane. Through this technical scheme, the ventilation window at greenhouse top can make the inside air in greenhouse arrange to outdoor fast, and circulation of air accelerates, reaches the inside and outside air exchange in greenhouse and rapid cooling's purpose.

Furthermore, the long arch and the short arch both adopt an upper chord truss structure and a lower chord truss structure, and the angle of the elevation angle of the short arch is 30-80 degrees.

Further, the heat preservation curtain with composite insulation wall's hookup location department is provided with the sealed pocket that keeps warm, the bottom mounting of the sealed pocket that keeps warm is in on the composite insulation wall, the top with the truss roof beam links to each other, the sealed pocket that keeps warm with form the contained angle that is less than 70 degrees between the composite insulation wall, be located the lower floor the flagging end of heat preservation curtain with the end of the sealed pocket that keeps warm links to each other, is located the upper strata the flagging end of heat preservation curtain falls the top of the sealed pocket that keeps warm. Through changing the technical scheme, not only can improve the heat preservation effect of greenhouse composite heat insulation wall, carry the indoor temperature of high temperature, can also improve the sealing performance between the heat preservation curtain and between heat preservation curtain and the greenhouse wall inlayer heat preservation membrane, improve the heat preservation effect, reduce the heat and scatter and disappear, energy-concerving and environment-protective.

Furthermore, the composite heat insulation wall body comprises an inner layer heat insulation film, a profile steel stand column, a rubber and plastic heat insulation board and an outer layer heat insulation film which are sequentially connected and parallel to each other, the bottom of the profile steel stand column is fixedly installed inside a water retaining brick wall on the ground, the bottom of the rubber and plastic heat insulation board is abutted against the water retaining brick wall, and the bottom ends of the inner layer heat insulation film and the outer layer heat insulation film are covered outside the water retaining brick wall. Through the technical scheme, the greenhouse can provide a good heat preservation effect for the greenhouse, can also improve the illumination intensity in the greenhouse, and provides good temperature, humidity and illumination environment for the growth of crops in the greenhouse.

Further, the inner-layer heat-insulation film and the outer-layer heat-insulation film both adopt aluminized films with the thickness of 100-200 mu m, and the rubber-plastic heat-insulation board adopts rubber-plastic materials made of rubber and polyvinyl chloride. The aluminized film is used as a reflecting screen for light supplement and temperature increase, so that sunlight irradiated on the greenhouse body can be reflected to crops, the illumination intensity in the greenhouse is increased, and the air temperature and the ground temperature are increased; and because the rubber and plastic heat-insulating plate is made of elastic closed-cell foam material, the heat conductivity coefficient is low, and the heat-insulating property of the outer wall of the greenhouse can be improved.

Compared with the traditional greenhouse, the high-efficiency energy-saving greenhouse provided by the invention has the following beneficial effects:

(1) according to the invention, the three layers of horizontal heat-insulation curtains, the wet curtain positive pressure fan ventilation system and the vertical ventilation window are arranged at the top of the greenhouse and are mutually matched to realize rapid ventilation, cooling or heat insulation in the greenhouse, so that the environment regulation and control capability of the greenhouse is improved, the growth of crops in the greenhouse is promoted, meanwhile, the energy is saved, the emission is reduced, the cost is reduced, the building area and the wind resistance of the greenhouse are improved, and the multi-span greenhouse is suitable for building and using a multi-span greenhouse with a large area.

(2) According to the invention, the positive-pressure ventilation cooling system is arranged between the first layer of heat-insulating curtain and the third layer of heat-insulating curtain, and the size of the cooling or ventilation space inside the greenhouse communicated with the positive-pressure ventilation cooling system is adjusted by combining the opening and closing states of the three layers of heat-insulating curtains, so that the purpose of reducing energy consumption is achieved; utilize positive pressure fan to absorb the outside air in greenhouse to wet curtain device and change into wet cold air inside the greenhouse after, carry out rapid cooling and ventilation, the inside temperature dispersion in greenhouse is even, avoids the cooling process temperature gradient to appear, easy operation is convenient, and the fan energy consumption is little, low in manufacturing cost, and economic environmental protection has got rid of traditional negative pressure fan to the restriction of greenhouse length, is applicable to the large tracts of land and has been linked the greenhouse and build the use.

(3) According to the invention, the asymmetric arch center is arranged at the top of the greenhouse, so that the wind resistance of the greenhouse can be improved, and the area of the greenhouse can be increased; the ventilation window is vertically arranged on the short arch frame of the leeward side, the air inlet volume of the ventilation opening is controlled by controlling the opening and closing of the film roll vertically covered at the ventilation opening, the negative pressure area generated by the leeward side is utilized to accelerate air convection, the humid and hot air gathered at the top of the greenhouse is rapidly discharged outdoors to exchange with the outside air, and the rapid ventilation, cooling and dehumidification of the inside of the greenhouse are realized.

(4) According to the invention, by arranging the composite heat-insulating wall body with good heat-insulating property and arranging the heat-insulating sealing bag at the connecting position of the heat-insulating curtain and the wall body, outside cold air is effectively prevented from entering the greenhouse, heat loss and heat transfer of the greenhouse to the outside of the greenhouse can be prevented, the heat-insulating effect of the greenhouse and the illumination intensity in the greenhouse are improved, and good temperature, humidity and illumination environment are provided for the growth of crops in the greenhouse.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic plan view of the energy efficient and efficient greenhouse of the present invention;

FIG. 2 is a schematic view of the construction of the positive plenum at the end of the greenhouse of the present invention;

FIG. 3 is a schematic view of the structure of a roof of a greenhouse of the present invention;

FIG. 4 is a schematic view showing the construction of a thermal insulation sealing bag at the end of a greenhouse according to the present invention;

FIG. 5 is a schematic structural view of the composite thermal insulation wall of the present invention;

FIG. 6 is a perspective view of a greenhouse main body of the multi-span greenhouse of the present invention;

FIG. 7 is a schematic view showing the structure of a thermal insulation sealing bag located in the middle of a greenhouse according to the present invention;

FIG. 8 is a schematic view showing the construction of the positive pressure ventilation system in the middle of the greenhouse according to the present invention.

Description of reference numerals: 1. a greenhouse body; 11. a composite heat-insulating wall body; 111. an inner layer heat insulation film; 112. a section steel upright post; 113. a rubber and plastic heat insulation plate; 114. an outer layer heat preservation film; 115. water retaining brick walls; 12. an arc arch frame; 121. a long arch frame; 122. a short arch frame; 123. an upper chord frame; 124. a lower chord frame; 13. a truss beam; 14. an air inlet area; 15. an air inlet; 16. a planting area; 17. a partition plate; 18. a PC hollow plate; 2. a heat preservation curtain; 21. a first layer of heat preservation curtain; 22. a second layer of heat preservation curtain; 23. a third layer of heat preservation curtain; 3. a positive pressure ventilation system; 31. a wet curtain device; 32. a positive pressure fan; 33. a vent pipe; 34. a vent hole; 4. a ventilation window; 41. a window top; 42. a window body; 43. a vent; 5. an insect-proof net; 6. rolling the film; 7. a first circulation fan; 8. a second circulation fan; 9. a heat-preservation sealing bag.

Detailed Description

The preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it should be understood that the embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the invention.

Examples

As shown in fig. 1 and 2, the high-efficiency energy-saving greenhouse provided by the present embodiment comprises a greenhouse main body 1, three horizontal layers of heat preservation curtains 2 and a positive pressure ventilation system 3 arranged inside the greenhouse main body 1, and ventilation windows 4 arranged on the top of the greenhouse main body 1. Through mutually supporting between three-layer horizontal heat preservation curtain 2, positive pressure ventilation system 3 and the ventilation window 4 in order to realize ventilating, cooling or keeping warm to greenhouse inside. As shown in fig. 1, the greenhouse body 1 includes a composite heat insulation wall 11 around, an arc arch 12 with asymmetric top, and a truss girder 13 arranged inside the greenhouse. The greenhouse main body 1 is made of galvanized steel pipes. As shown in fig. 2, the positive pressure aeration cooling system 3 includes a wet curtain device 31, a positive pressure blower 32 and a ventilation pipe 33, the thickness of the wet curtain paper in the wet curtain device 31 is 10 cm, and the height of the wet curtain device 31 is 1.8 m. The heat preservation screen 2 comprises a first layer of heat preservation screen 21, a second layer of heat preservation screen 22 and a third layer of heat preservation screen 23. The first layer of heat preservation curtain 21 adopts a climate curtain with 80% of light transmittance and 45% of energy saving rate, the second layer of heat preservation curtain 22 adopts a climate curtain with 55% of light transmittance and 70% of energy saving rate, and the third layer of heat preservation curtain 23 adopts a climate curtain with light-proof performance (with 99% of light transmittance) and 85% of energy saving rate. The total height of the greenhouse structure is 8.8 meters, and the installation heights of the first layer of heat-insulating curtain 21, the second layer of heat-insulating curtain 22 and the third layer of heat-insulating curtain 23 from the ground are 2.8 meters, 4.6 meters and 5.2 meters respectively.

As shown in fig. 4, a heat preservation sealing bag 9 is arranged at the connection position of the heat preservation curtain 2 and the composite heat preservation wall 11, the bottom end of the heat preservation sealing bag 9 is fixed on the composite heat preservation wall 11, the top end of the heat preservation sealing bag is connected with the truss girder 13, and an included angle smaller than 70 degrees is formed between the heat preservation sealing bag 9 and the composite heat preservation wall 11. The lower chord and the upper chord of the greenhouse truss girder 13 are used for supporting curtain supporting lines of the second layer of heat preservation curtain 22 and the third layer of heat preservation curtain 23 respectively. The end that hangs down that lies in the second layer heat preservation curtain 22 of lower floor links to each other with the end of heat preservation sealing pocket 9, and the end that hangs down that lies in the third layer heat preservation curtain 23 of upper strata just in time hangs down in the top of heat preservation sealing pocket 9, forms sealing connection, avoids keeping between heat preservation curtain and the greenhouse outer wall space heat conduction, reduces the inside heat of greenhouse and scatters and disappears, improves greenhouse heat preservation effect.

As shown in figures 1 and 2, an air inlet area 14 is arranged on one side of a greenhouse main body 1, and the air inlet area 14 is positioned between a first layer of heat preservation curtain 21 and a third layer of heat preservation curtain 23 and is separated from a planting area 16 of the greenhouse through a partition board 17. The inner wall of the air inlet area 14 is provided with a layer of PC hollow plate 18, and the excellent light transmission performance and heat insulation performance of the PC hollow plate are utilized to reduce the influence of the air inlet area 14 on plant lighting and simultaneously facilitate the maintenance of the temperature of cold air in the air inlet area 14. An air inlet 15 is arranged on one side of the air inlet area 14, and the outer side of the air inlet 15 is sequentially covered with an insect-proof net 5 and a rolling film 6 from inside to outside. The wet curtain device 31 is arranged on the inner side of the air inlet 15 and covers the air inlet 15, and the positive pressure fan 32 is arranged on the other side of the air inlet area 14 and opposite to the wet curtain device 31. An air inlet of the positive pressure fan 32 is communicated with the air inlet area 14, an air outlet is communicated with the ventilation pipe 33, and the ventilation pipe 33 is communicated with the planting area 16 in the greenhouse. The pipe wall of the ventilation pipe 33 is provided with a plurality of ventilation holes 34, and the ventilation pipe 33 is internally communicated with a plurality of groups of first circulating fans 7. And a second circulating fan 8 communicated with the planting area 16 is arranged above the greenhouse main body 1.

As shown in fig. 1 and 3, the arch 12 includes a long arch 121 on the windward side and a short arch 122 on the leeward side. The long arch 121 and the short arch 122 both adopt an upper-lower chord type truss structure, the upper chord 123 and the lower chord 124 are connected by welding a plurality of groups of steel frames which are arranged in a triangular mode, and the elevation angle of the short arch 122 is 30-80 degrees. The ventilating window 4 is vertically arranged above the short arch 122, the ventilating window 4 comprises an arc-shaped window top 41 and a vertical window body 42, the window top 41 is connected with the long arch 121 and is identical to the long arch 121 in shape, a ventilating opening 43 is formed in one side, facing the leeward side, of the window body 42, the ventilating opening 43 is sequentially covered with the insect-proof net 5 and the rolling film 6 from inside to outside, and the ventilation quantity of the ventilating opening 43 is adjusted by controlling the opening and closing of the rolling film 5 covered at the ventilating opening 43.

As shown in fig. 5, the composite thermal insulation wall 11 includes an inner thermal insulation film 111, a profile steel column 112, a rubber-plastic thermal insulation board 113, and an outer thermal insulation film 114, which are connected in sequence and parallel to each other. The outer surface of the inner layer heat-insulating film 111 is in contact with the air inside the greenhouse, the outer surface of the outer layer heat-insulating film 114 is in contact with the air outside the greenhouse, the bottom of the section steel upright post 112 is fixedly arranged inside the water-retaining brick wall 115 on the ground, and cement mortar is covered between the water-retaining brick wall 115 and the section steel upright post 112 and outside the water-retaining brick wall 115 for fixation. The bottom of the rubber and plastic heat insulation plate 113 abuts against the water retaining brick wall 115, and the bottom ends of the inner layer heat insulation film 111 and the outer layer heat insulation film 114 both cover the outside of the water retaining brick wall 5. Wherein, the inner layer heat preservation film 111 and the outer layer heat preservation film 114 both adopt aluminum plating films with the thickness of 150 μm, the section steel upright posts 112 are made of hollow steel pipes, and a certain hollow layer is formed between the inner layer heat preservation film 111 and the rubber and plastic heat preservation plate 113. The rubber-plastic heat-insulating plate 113 is made of rubber and polyvinyl chloride.

The high-efficiency energy-saving greenhouse provided by the embodiment can be applied to the construction of multi-span greenhouses, and as shown in fig. 6, the single-span greenhouses are closely arranged and connected together according to a certain number of rows and columns, so that the space between the adjacent single-span greenhouses is eliminated, the utilization rate of the land is greatly improved, and the mechanical production is facilitated. In the middle of the large-area multi-span greenhouse, namely between two adjacent greenhouses, as shown in fig. 7, a heat-insulating sealing pocket 9 is also arranged at the joint position of the heat-insulating curtain and the wall body, so that the heat loss in the greenhouse is avoided, and the heat-insulating performance is improved. In order to improve the cooling effect of the large-area multi-span greenhouse, a wet curtain room with positive pressure ventilation systems is arranged in the middle of the multi-span greenhouse, the two ends of the wet curtain room are respectively connected with the greenhouse, as shown in fig. 8, two groups of positive pressure ventilation systems are symmetrically arranged and are respectively communicated with the greenhouses on the left side and the right side of the wet curtain room to cool the greenhouse, ventilation windows 4 are arranged on the leeward side of the top of the wet curtain room, window openings with insect-proof nets 5 and rolling films 6 are additionally arranged on the windward side to increase the ventilation volume, the insect-proof nets 5 of the positive pressure ventilation systems 3 are arranged on truss girders 13, air enters the wet curtain room to be cooled through the wet curtain devices 31 on the left side and the right side respectively, and cold air is respectively transmitted into the greenhouses on the two sides to be cooled through ventilation pipes 33 connected with positive pressure fans 32.

The high-efficiency energy-saving greenhouse of the embodiment is used as follows:

(1) when the greenhouse needs to be cooled in summer, the third layer of heat-insulating curtain 23 is folded by the driving device, the second layer of heat-insulating curtain 22 is unfolded, the upper high-temperature space of the greenhouse and the lower planting area space needing to be cooled are separated, the positive pressure ventilation system 3 is communicated with the space below the second layer of heat-insulating curtain 22, the rolling film 6 covering the air inlet 15 is rolled up by controlling the rolling film machine, the size of the air inlet is adjusted, the positive pressure fan 32 is operated, air outside the greenhouse main body 1 is sucked by the wet curtain device 31 for cooling and then enters the air inlet area 14, the air is conveyed to the ventilation pipe 33 by the positive pressure fan 32 in positive pressure, the air is discharged to each position inside the greenhouse by the first circulating fan 7 and the ventilation hole 34, under the auxiliary action of the second circulating fan 8, the space below the second layer of heat-insulating curtain 22 inside the greenhouse main body 1 is rapidly cooled and ventilated, so as to meet the requirement of crop growth in the planting area 16 for stabilizing the environmental temperature, the cooling space is reduced, and the energy consumption is obviously reduced.

(2) When the outside temperature of the greenhouse is suitable and windless, and the inside of the greenhouse needs to be rapidly cooled down or rapidly ventilated, the three-layer horizontal heat-insulating curtain is rolled up, the ventilation window 4 at the top of the greenhouse is opened, the water pump in the wet curtain device 31 is closed, the natural wind convected at the ventilation opening 43 is utilized for ventilation, and the positive pressure fan 32 can be simultaneously opened to forcibly ventilate and cool the inside of the greenhouse.

(3) When the greenhouse needs to be heated and insulated at night or in winter, the positive pressure ventilation system 3 does not need to be started, the third layer of heat insulation curtain 23 is unfolded, and the heating space in the greenhouse is reduced, so that the purpose of saving energy consumption is achieved.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.