CN111248007A

CN111248007A - Ventilation and heat preservation device of greenhouse

Info

Publication number: CN111248007A
Application number: CN201910429425.7A
Authority: CN
Inventors: 靳露冬
Original assignee: Beijing Nanshi Technology Co ltd
Current assignee: Beijing Nanshi Technology Co ltd
Priority date: 2018-12-03
Filing date: 2019-05-22
Publication date: 2020-06-09
Also published as: CN109496620A

Abstract

The invention provides a ventilation and heat preservation device of a greenhouse, which comprises a greenhouse framework, a connecting assembly, a heat preservation assembly and a film assembly, wherein the film assembly covers the greenhouse framework and comprises a first film and a second film; the heat insulation assembly comprises a scroll, a heat insulation layer wound on the scroll and a driving piece connected with the scroll, wherein the driving piece is used for driving the scroll to rotate so that the heat insulation layer covers the film assembly and/or is wound on the scroll; the film assembly is connected with the heat insulation assembly through the connecting assembly, so that the heat insulation assembly drives the film assembly to expose or cover the preset ventilation area. The ventilation and heat preservation device for the greenhouse provided by the invention can simultaneously control the operation of opening the heat preservation layer and ventilating the interior of the greenhouse.

Description

Ventilation and heat preservation device of greenhouse

Technical Field

The invention relates to the technical field of agriculture, in particular to a ventilation and heat preservation device for a greenhouse.

Background

The greenhouse is a frame film covering system with excellent heat preservation performance, generally the greenhouse mainly comprises a greenhouse framework and a plastic film covered on the greenhouse framework, the plastic film has heat preservation performance, and after the plastic film is covered, the temperature in the greenhouse is increased along with the increase of the external illumination intensity and the temperature; due to the heat insulation property of the plastic film, when the sunlight is sufficient at noon, the temperature in the greenhouse is high, so that the interior of the greenhouse needs to be ventilated and cooled, and the temperature of the external environment at night is low, so that the interior of the greenhouse needs to be insulated, and the temperature in the greenhouse is kept at the temperature which is 15-30 ℃ and is suitable for the growth of crops through heat insulation and ventilation and cooling.

In the prior art, the greenhouse keeps the temperature in the greenhouse in a mode of covering a heat preservation layer on a plastic film, and performs ventilation and cooling in the greenhouse in a mode of arranging a ventilation opening on the greenhouse. The insulating layer is rolled up and put down by arranging a scroll and driving pieces arranged at the two ends of the scroll so as to realize the folding and covering of the insulating layer; then the ventilation opening is manually opened by manpower to realize the ventilation and cooling of the interior of the shed.

However, in the prior art, the heat-insulating layer is rolled up and put down and the vent opening is controlled independently, so that the installation and control cost is increased, the operation is complex, the environment in the greenhouse of the greenhouse is not easily controlled accurately, and the growth of crops is not easily realized.

Disclosure of Invention

The embodiment of the invention provides a ventilation and heat preservation device for a greenhouse, and aims to solve the problems that in the prior art, the rolling up and the laying down of a heat preservation layer of the greenhouse are controlled independently from the opening and closing of a ventilation opening of the greenhouse, the operation is complex, and the environment in the greenhouse of the greenhouse is not easy to control accurately.

The embodiment of the invention provides a ventilation and heat preservation device of a greenhouse, which comprises a greenhouse framework, a connecting assembly, a heat preservation assembly and a film assembly, wherein the film assembly covers the greenhouse framework and comprises a first film and a second film;

the heat insulation assembly comprises a scroll, a heat insulation layer wound on the scroll and a driving piece connected with the scroll, wherein the driving piece is used for driving the scroll to rotate so that the heat insulation layer covers the film assembly and/or is wound on the scroll;

the film assembly is connected with the heat insulation assembly through the connecting assembly, so that the heat insulation assembly drives the film assembly to expose or cover the preset ventilation area.

As an optional mode, in the ventilation and insulation device for a greenhouse provided by the invention, the first film covers the greenhouse framework, the first film is provided with a vent to form a preset ventilation area, the second film is connected with the first film and covers the vent, and the driving piece is used for driving the reel to rotate so that the insulation layer covers the first film or is wound on the reel;

the second film is connected with the heat-insulating layer through a connecting component, so that the heat-insulating layer drives the second film to open or cover the ventilation opening.

As an optional mode, in the ventilation and insulation device for the greenhouse provided by the invention, the first film and the second film are partially connected or partially overlapped;

the first film is connected with the heat insulation assembly through a connecting assembly, so that the heat insulation assembly drives the first film to open or cover a preset ventilation area; or the second film is connected with the heat insulation assembly through the connecting assembly, so that the heat insulation assembly drives the second film to open or cover the preset ventilation area.

As an optional mode, the ventilation and thermal insulation device for the greenhouse provided by the invention comprises a connecting assembly, a tension belt, a connecting belt, a rotating member and a resetting member, wherein the tension belt is positioned between the first film or the second film and the thermal insulation layer, one end of the tension belt is connected with the reel, the other end of the tension belt is connected with the top of the greenhouse,

the tension belt rolls together with the insulating layer; the connecting belt is wound on the rotating piece, is positioned between the tension belt and the reset piece and is respectively connected with the tension belt and the reset piece; the first film or the second film is connected with the connecting belt.

As an optional mode, in the ventilation and insulation device for a greenhouse provided by the invention, the reset piece is located on the outer side of the greenhouse, the number of the rotating pieces is at least one, and at least one rotating piece is located on the outer side of the greenhouse.

As an optional mode, in the ventilation and insulation device for a greenhouse provided by the invention, the reset pieces are positioned on the inner side of the greenhouse, the number of the rotating pieces is at least two, and the rotating pieces are respectively positioned on two sides of the overlapping position or two sides of the connecting position of the first film and the second film.

As an optional mode, in the ventilation and heat preservation device for the greenhouse, provided by the invention, the connecting belt is a pull rope or a woven belt; the tension belt is a pull rope or a woven belt.

As an optional mode, the ventilation and insulation device for the greenhouse provided by the invention further comprises an emergency stop switch, wherein the emergency stop switch is positioned at the top of the greenhouse, and the emergency stop switch is connected with the driving piece so as to close the driving piece when the reel approaches the emergency stop switch.

As an optional mode, the ventilation and heat preservation device for the greenhouse provided by the invention further comprises a control system, wherein the control system comprises a controller and a position detector, the driving piece and the position detector are both connected with the controller, and the position detector is positioned at the top or the bottom or the side of the greenhouse; or the position detector is positioned above the greenhouse and used for detecting the position of the reel;

the controller is used for controlling the heat-insulating assembly to drive the first film to completely cover or partially cover the preset ventilation area through the driving piece according to the position of the reel; or the driving part controls the heat preservation assembly to drive the second film to completely cover or partially cover the preset ventilation area.

As an optional mode, the ventilation and heat preservation device for the greenhouse provided by the invention further comprises a bracket or a rocker arm assembly, wherein the bracket is arranged at the top of the greenhouse, and the position detector is positioned on the bracket or the rocker arm assembly;

the rocker arm assembly comprises a first connecting arm, a second connecting arm and a cable, the position detector is connected with the cable, the first connecting arm is connected with the second connecting arm, the first connecting arm is connected with the bottom of the greenhouse, the second connecting arm is connected with the driving piece, and the cable is connected with the driving piece.

The invention also provides a ventilation and heat preservation device of the greenhouse, the greenhouse comprises a greenhouse framework and a first film covered on the greenhouse framework, the first film is provided with a ventilation opening, and the device comprises a second film, a connecting component and a heat preservation component;

the second film is connected with the first film and covers the vent;

the heat insulation assembly comprises a scroll, a heat insulation layer wound on the scroll and a driving piece connected with the scroll, wherein the driving piece is used for driving the scroll to rotate so that the heat insulation layer covers the first film or is wound on the scroll;

As an optional mode, the connecting assembly of the ventilation and heat preservation device for the greenhouse provided by the invention comprises a connecting belt, a rotating member and a resetting member, wherein the connecting belt is wound on the rotating member, the connecting belt is positioned between the heat preservation layer and the resetting member, and the connecting belt is respectively connected with the heat preservation layer and the resetting member; the second film is connected with the connecting band.

As an optional mode, the rotating member of the ventilation and insulation device for greenhouses provided by the invention comprises at least two rotating wheels, the two rotating wheels are respectively positioned at two opposite sides of the ventilation opening, and the joint of the second film and the connecting belt is positioned between the two rotating wheels at two opposite sides of the ventilation opening.

The invention provides a ventilation and heat preservation device of a greenhouse, which is characterized in that a greenhouse framework, a connecting assembly, a heat preservation assembly and a film assembly covered on the greenhouse framework are arranged, the film assembly comprises a first film and a second film, the greenhouse framework is provided with a preset ventilation area, the first film and the second film cover the preset ventilation area together, and the areas covered by the first film and the second film are different; the heat preservation subassembly includes the spool, rolls up the driving piece of establishing at epaxial heat preservation and being connected with the spool, and the driving piece is used for driving the spool and rotates, and the film assembly passes through coupling assembling with the heat preservation subassembly to be connected to make the heat preservation subassembly drive the film assembly and expose or cover and predetermine the ventilation zone, can open the heat preservation and carry out the operation that ventilates in the canopy to the big-arch shelter by simultaneous control. The problem of among the prior art the roll-up of the heat preservation of big-arch shelter and put down and the opening and closing mutual independent control of the vent of big-arch shelter, the operation is complicated, is unfavorable for the interior environment of accurate control big-arch shelter's canopy is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a ventilation and heat preservation device for a greenhouse according to an embodiment of the present invention;

fig. 2 is a left side view of a ventilation and heat preservation apparatus for greenhouses according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the invention at A in FIG. 2;

fig. 4 is a schematic structural diagram of a first alternative embodiment of a control system of a ventilation and thermal insulation device for a greenhouse according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second alternative embodiment of a control system of a ventilation and thermal insulation device for a greenhouse according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a third alternative embodiment of a control system of a ventilation and thermal insulation device for a greenhouse according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a fourth alternative embodiment of a control system of a ventilation and thermal insulation device for a greenhouse according to an embodiment of the present invention;

fig. 8 is a schematic view of the overall structure of a ventilation and thermal insulation device for a greenhouse according to a second embodiment of the present invention;

fig. 9 is a left side view of a ventilation and heat preservation apparatus for greenhouses according to a second embodiment of the present invention;

FIG. 10 is an enlarged partial view taken at B of FIG. 9 in accordance with the present invention;

fig. 11 is a schematic view of an overall structure of a ventilation and thermal insulation device for a greenhouse according to a third embodiment of the present invention.

Reference numerals:

10-greenhouse framework; 11-a scaffold; 12-mounting grooves; 20-a first film; 30-a vent; 40-a second film; 50-a connecting assembly; 51-a connecting band; 52-a rotating member; 53-a reset piece; 54-tension band; 60-a heat preservation component; 61-reel; 62-insulating layer; 63-a drive member; 64-a rocker arm assembly; 70-emergency stop switch; 80-a control system; 81-a controller; 82-a position detector; 821-a first position detector; 822-a second position detector; 83-temperature sensor; 831 — first temperature sensor; 832-a second temperature sensor; 84-a humidity sensor; 841-a first humidity sensor; 842-a second humidity sensor; 85-a soil sensor; 86-a light intensity sensor; 87-rain and snow sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Fig. 1 is a schematic view of an overall structure of a ventilation and thermal insulation device for a greenhouse according to an embodiment of the present invention. Fig. 2 is a left side view of a ventilation and thermal insulation device for a greenhouse according to an embodiment of the present invention. Fig. 3 is an enlarged view of a portion of the invention at a in fig. 2.

Referring to fig. 1 to 3, a ventilation and insulation apparatus for a greenhouse according to an embodiment of the present invention includes a greenhouse frame 10 and a first film 20 covering the greenhouse frame 10, the first film 20 having a ventilation opening 30, the ventilation and insulation apparatus including a second film 40, a connection assembly 50, and an insulation assembly 60;

the second film 40 is connected with the first film 20, and the second film 40 covers the vent 30;

the heat insulation assembly 60 comprises a reel 61, a heat insulation layer 62 wound on the reel 61, and a driving member (not shown in fig. 1 to 3) connected to the reel 61, wherein the driving member is used for driving the reel 61 to rotate so that the heat insulation layer 62 covers the first film 20 or is wound on the reel 61;

the second membrane 40 is connected to the insulating layer 62 by the connecting member 50 so that the insulating layer 62 carries the second membrane 40 to open or cover the ventilation opening 30.

Specifically, the vent 30 in this embodiment may be a vent formed in the first film 20, and in this embodiment, the vent 30 is formed to ventilate the greenhouse in good time, so as to ensure the stability of the internal environment of the greenhouse and improve the growth efficiency of crops in the greenhouse. Optionally, in this embodiment, the driving members may be two driving motors that synchronously operate and are connected to two ends of the reel 61, and the driving motors that synchronously operate are provided to drive the reel 61 to rotate, so that the stability of the rotation of the reel 61 can be ensured. Of course, in the case of stable rotation of the winding shaft 61, in order to save energy, the driving member in the present embodiment may be a single driving motor disposed in the middle of the winding shaft 61. Alternatively, the driving member and the winding shaft 61 in this embodiment may be connected by a coupling, a gear box or a transmission belt. Optionally, since the reel 61 moves along the greenhouse frame 10 during the process of rolling the insulation layer 62 by the reel 61 in the present embodiment, the driving member in the present embodiment may also be connected to the reel in a manner of moving synchronously with the reel. Specifically, the moving mode of the driving member and the reel 61 can refer to the movement of the reel and the driving member of the greenhouse in the prior art, and details are not repeated in this embodiment. Optionally, in the insulating layer 62 in this embodiment, along the width direction of the greenhouse, one end of the insulating layer 62 is connected to the scroll 61 to ensure that when the scroll 61 is scrolled, the insulating layer 62 can be scrolled together with the scroll 61, and the other end of the insulating layer 62 is connected to the top of the greenhouse to ensure that the insulating layer 62 completely covers the greenhouse.

Optionally, in this embodiment, the greenhouse frame 10 may adopt an all-steel frame connected arch structure, or a three-sided earth wall and steel frame fan structure, or a three-sided brick wall and steel frame fan structure, and the like, and is selected according to different latitudes and altitudes of various regions and the temperature in winter of the local region, which is not limited herein in this embodiment. The greenhouse framework 10 can be further provided with a plurality of supporting columns which can be vertically arranged, the tops of the supporting columns can be connected with the greenhouse framework 10, and the bottoms of the supporting columns can be connected with the bottom surface. In this embodiment, by providing the plurality of supporting columns, the plurality of supporting columns can support the greenhouse frame 10, and the bearing capacity of the greenhouse frame 10 is improved.

Optionally, referring to fig. 1, in the present embodiment, a plurality of ventilation openings 30 may be arranged along the length direction of the greenhouse, and the plurality of ventilation openings 30 are covered with the second film 40. The plurality of ventilation openings can ensure the uniformity and evenness of ventilation along the length direction of the greenhouse. The vents 30 may be located near the top of the greenhouse. In this embodiment, the vent 30 is arranged at the top of the greenhouse, so that the uniformity of the temperature in the greenhouse can be ensured under the condition of ventilation in winter, and the problem of overlarge temperature difference in the greenhouse due to the fact that the temperature of the position close to the vent 30 is low and the temperature of the position far away from the vent 30 is high after the vent 30 is opened when the vent 30 is arranged at the position close to the bottom is prevented.

Optionally, the first film 20 and the second film 40 are rectangular, and have four edges, and the four edges of the first film 20 are connected to the greenhouse frame 10, or the four edges of the first film 20 are respectively connected to the greenhouse frame 10 or the ground, so that the wind resistance of the first film 20 is improved. The rectangular ventilation opening 30 is formed in the position, close to the top of the greenhouse, of the first film 20, so that ventilation can be conducted in the greenhouse timely, and the uniformity of the temperature in the greenhouse is guaranteed. The second film 40 covers the vent 30, is connected with the first film 20 at a position close to the bottom of the greenhouse at the edge of the vent 30 and is used for opening or covering the vent 30 at the right time according to needs to achieve the purpose of ventilating or insulating the greenhouse, the rest edges of the second film 40 except the edge connected with the first film 20 at the vent 30 are connected with the greenhouse framework 10, and the wind resistance of the second film 40 is improved while the sealing performance of the greenhouse is guaranteed by the connection of the second film 40 and the greenhouse framework. Optionally, a film pressing rope (not shown in the figure) is arranged in the width direction of the greenhouse, one end of the film pressing rope is connected with the top of the greenhouse, the other end of the film pressing rope is connected with the bottom of the greenhouse, the existence of the film pressing rope ensures that the first film 20 and the second film 40 are in a tensioning and unfolding state, the transmittance is improved, and the wind resistance is improved. Optionally, the greenhouse can be provided with a plurality of film pressing ropes along the length direction, and 1 film pressing rope can be arranged at intervals of about 1 meter.

Optionally, in this embodiment, the insulating layer 62 may have a multi-layer structure, for example, the insulating layer 62 may include an insulating quilt and a plastic film stacked on each other, the insulating quilt and the plastic film may be rolled on the reel 61 together, the second film 40 may be driven by the insulating quilt to open or cover the vent 30, and the second film 40 may also be driven by the plastic film to open or cover the vent 30. Alternatively, in this embodiment, a transparent plastic or strip canvas may be attached to the joint of the heat insulation layer 62 and the connecting member 50, and the connecting member 50 is driven by the transparent plastic or strip canvas to drive the second membrane 40 to open or cover the vent 30.

Specifically, referring to fig. 1, in the process that the driving element 63 drives the reel 61 to rotate from the top of the greenhouse to the bottom of the greenhouse, the heat insulation layer 62 is rolled on the reel 61 and moves to completely cover the first film 20 and the second film 40, so that the purpose of heat insulation of the interior of the greenhouse at night is achieved. In the process that the driving part 63 drives the reel 61 to rotate from the bottom of the greenhouse to the top of the greenhouse, the heat-insulating layer 62 is gradually wound on the reel 61 from the first film 20 and the second film 40, so that the purposes of lighting and heat insulation are achieved.

The embodiment of the invention provides a ventilation and heat preservation device of a greenhouse, which comprises a greenhouse framework and a first film covered on the greenhouse framework, wherein the first film is provided with a vent; the second film is connected with the first film and covers the vent; the heat insulation assembly comprises a scroll, a heat insulation layer wound on the scroll and a driving piece connected with the scroll, wherein the driving piece is used for driving the scroll to rotate so that the heat insulation layer covers the first film or is wound on the scroll; the second film is connected with the heat-insulating layer through a connecting component, so that the heat-insulating layer drives the second film to open or cover the ventilation opening. So, pass through coupling assembling and be connected with the heat preservation with the second film to the heat preservation can make the second film open or cover the vent when the drive of driving piece is down rotated, guarantees through the operation of opening the heat preservation, realizes opening the operation of vent and ventilates in order to the canopy of big-arch shelter, has realized the operation that covers the vent through the operation that covers the heat preservation, with carry out heat retaining purpose in the canopy to the big-arch shelter. The complex operation is avoided, the accuracy of controlling the environment in the greenhouse of the greenhouse is improved, and the growth of crops in the greenhouse is facilitated.

Alternatively, referring to fig. 1 to 3, in the ventilation and insulation device for greenhouses according to the embodiment of the present invention, the connection assembly 50 includes a connection belt 51, a rotation member 52 and a return member 53, the connection belt 51 is wound around the rotation member 52, the connection belt 51 is located between the insulation layer 62 and the return member 53, the connection belt 51 is connected to the insulation layer 62 and the return member 53, respectively, and the second film 40 is connected to the connection belt 51.

Alternatively, referring to fig. 1 to 3, in the present embodiment, a first end of the connection belt 51 is connected to the heat insulating layer 62, the second film 40 is connected to the connection belt 51, and a second end of the connection belt 51 is connected to the reset member 53. The connection position of the connection belt 51 and the second film 40 is located between the connection position of the connection belt 51 and the heat insulation layer 62 and the connection position of the connection belt 51 and the reset member.

Specifically, in the present embodiment, the rotating member 52 may be a tension roller, and the connecting belt 51 is wound around the tension roller. Alternatively, in this embodiment, the restoring member 53 may be a lead weight or an iron weight. In this embodiment, the reset piece 53 and the tension roller can tension the connection belt 51, thereby preventing the second film 40 from being wrinkled and unable to completely cover the vent 30. The linkage of the second film 40 and the insulating layer 62 is improved. Effectively ensures the stability of the environment in the greenhouse and is beneficial to the growth of crops in the greenhouse.

Alternatively, in the present embodiment, the restoring member 53 may be a weight block as shown in the figure, and the weight block 53 tensions the connecting belt 51 by its own weight. Specifically, the reset piece 53 ensures that the connecting belt 51 is in a tensioning state through the self gravity, when the reel 61 moves towards the top of the greenhouse, the insulating layer 62 drives the connecting belt 51, and the connecting belt 51 drives the second film 40 and the reset component 53 to move, so that the purpose of opening the vent 30 through the second film 40 is achieved; when the scroll 61 moves from the top of the greenhouse to the bottom, the insulating layer 62 drives one end of the connecting belt 51 connected with the insulating layer 60 to move downwards, the reset piece 53 drives the other end of the connecting belt 51 connected with the reset piece 53 to move downwards, and the connecting belt 51 drives the second film 40 to move, so that the purpose of covering the vent 30 is achieved.

Optionally, in this embodiment, the resetting piece 53 may also be an elastic resetting piece with one end connected to the greenhouse frame 10 or the ground or the film pressing rope and the other end connected to the connecting band 51, optionally, the elastic resetting piece may be an elastic resetting piece such as an extension spring or a rubber band, and the elastic resetting piece tensions the connecting band 51 through its own elastic restoring force. In order to ensure the normal operation of the elastic resetting element, the elastic resetting element is required to be in a stretching state, and the operation principle and action thereof are consistent with the principle that the connecting belt 51 is tensioned under the action of gravity, which is not described herein again.

Optionally, a chicken button hole may be added at a position where the heat insulation layer 62 needs to be connected with the connection belt 51, and the connection belt 51 is knotted after passing through the chicken button hole from the lower side of the heat insulation layer 62, so as to realize stable connection between the heat insulation layer 62 and the connection belt 51.

Optionally, the connection between the connection belt 51 and the second film 40 may use a ship-shaped air release device for the greenhouse, at this time, the connection belt 51 may be divided into two sections, one end of the first section is connected with the reset piece 53, and the other end is connected with the ship-shaped air release device for the greenhouse; one end of the second section is connected to the insulation layer 62 and the other end is connected to the ship-type air diffuser of the greenhouse. The use of the ship-shaped air release device simplifies the installation process, and the use of the ship-shaped air release device avoids the situation that the second film 40 is folded in the ventilation opening in a double-layer manner after moving along with the connecting belt 52 at the edge.

Optionally, when the scroll 61 rolls the insulating layer 62 to the top end of the greenhouse, the scroll 61 is mostly curved, in order to ensure that the insulating layer drives the second film 40 to uniformly open the vent, when the scroll 61 is located at the top end of the greenhouse, the connecting position of the insulating layer 62 and the connecting band 51 is selected according to the size of the vent 30 required at the position, so as to ensure the consistency of the opening of the vent 30 when the scroll 61 is located at the top end of the greenhouse, and to avoid the unevenness of opening or covering the vent 30 caused by the bending of the scroll 61.

Optionally, a plurality of ventilation and heat preservation devices of the greenhouse provided by the embodiment of the invention can be arranged in the length direction of the greenhouse. Specifically, a connecting assembly 50 is arranged at an interval of about 1.5 meters to ensure that the greenhouse with the heat-insulating layer 62 uniformly drives the second film 40 to open the ventilation opening 30 along the length direction so as to ventilate the greenhouse.

Further, referring to fig. 1 to 3, in the ventilation and insulation device for a greenhouse according to the embodiment of the present invention, the rotating member 52 includes at least two rotating wheels, the two rotating wheels are respectively located at two opposite sides of the ventilation opening 30, and a connection portion between the second film 40 and the connection belt 51 is located between the two rotating wheels 52 at two opposite sides of the ventilation opening 30.

Since the rolling shaft 61 of the greenhouse normally moves from the bottom of the greenhouse to the top of the greenhouse or from the top of the greenhouse to the bottom of the greenhouse, in order to accommodate the rolling of the rolling shaft 61 of the greenhouse on the insulating layer 62, in the present embodiment, as shown in fig. 1 to 3, two fixed pulleys may be provided on two opposite sides of the ventilation opening 30 along the greenhouse frame 10, that is, on two sides of the ventilation opening in the width direction of the greenhouse.

Optionally, in this embodiment, the two rotating members may be fixed pulleys, and the fixed pulleys may be fixed on the greenhouse frame 10 or detachably disposed on the greenhouse frame 10. The cooperation of the fixed pulley and the reset member 53 ensures that the connecting belt 51 is under tension, ensuring that the second film 40 can open or cover the vent 30. Optionally, the fixed pulleys on the inner side of the greenhouse can be directly fixed on the greenhouse framework 10; the fixed pulley outside the greenhouse can penetrate through the first film 20 to be fixed on the greenhouse frame 10 due to the fact that the first film 20 covers the greenhouse frame 10. Alternatively, a special bracket may be formed to extend to the outside through the ventilation opening 30 for fixing the outer fixed pulley, and considering that the insulation layer 62 covers the greenhouse entirely, the outer fixed pulley and the special bracket for fixing the outer rotating wheel are also covered, which requires the outer rotating wheel and the special bracket for fixing the outer rotating wheel to be as thin as possible. Optionally, a steel pipe is installed outside the greenhouse, the length of the steel pipe is the same as that of the greenhouse, two ends of the steel pipe are fixed on the greenhouse framework, and the fixed pulley outside the greenhouse is connected to the steel pipe. The steel pipe ensures the convenience of mounting the plurality of outer fixed pulleys of the greenhouse. Optionally, a steel pipe is installed on the inner side of the greenhouse, the length of the steel pipe is the same as that of the greenhouse, the steel pipe is fixed on the greenhouse framework, and the fixed pulley on the inner side of the greenhouse is connected to the steel pipe. The use of this steel pipe has ensured the convenience that a plurality of inboard rotation pieces of big-arch shelter installed.

Alternatively, referring to fig. 3, in the present embodiment, the fixed pulley near the top of the greenhouse is disposed on the outer side of the greenhouse, the fixed pulley near the bottom of the greenhouse is disposed on the inner side of the greenhouse, and the connecting belt 51 may pass through the lower part of one fixed pulley on the side of the ventilation opening 30 near the top of the greenhouse from the connecting position with the insulating layer 62, then wind around the other fixed pulley on the side of the ventilation opening 30 near the bottom of the greenhouse, and finally connect to the reset member 53. Therefore, the connecting belt 51 can be effectively tensioned by the two fixed pulleys, and the connecting belt 51 can effectively drive the second film 40 to open or cover the vent 30. In the present embodiment, two fixed pulleys are provided, and the connecting belt 51 is wound around the two fixed pulleys in sequence; therefore, the connection point of the first end of the connection strap 51 and the insulation layer 62 is located at the side of the ventilation opening 30 close to the top of the greenhouse. Thus, when the reel 61 drives the insulating layer 62 to cover the first film 20, since the connection position of the first end of the connection belt 51 and the insulating layer 62 is located at the side of the vent 30 close to the top of the greenhouse, the connection belt 51 cannot continue to move downwards under the drive of the insulating layer 62, and the situation that the vent 30 is opened again by the movement of the connection belt 51 can be avoided.

Optionally, in this embodiment, a distance between a connection point where the first end of the connection belt 51 is connected to the insulating layer 62 and the top of the greenhouse is less than or equal to a distance between a connection point where the first end of the connection belt 51 is connected to the insulating layer 62 and a connection point where the second film 40 is connected to the connection belt 51. In the embodiment, the distance between the connection position and the top of the greenhouse is set to be less than or equal to the distance between the connection position and the connection position of the second film 40 and the connection belt 51, so that when the reel 61 is rolled to the top of the greenhouse, the ventilation opening can be effectively opened, the second film 40 is not damaged, and the service life of the second film 40 is effectively prolonged. Optionally, in this embodiment, a distance between a connection point where the first end of the connection belt 51 is connected to the insulating layer 62 and the top of the greenhouse is greater than or equal to a distance between the top of the second film 40 and a connection point where the second film 40 is connected to the connection belt 51. In this embodiment, the distance between the joint of the first end of the connecting band 51 and the insulating layer 62 and the top of the greenhouse is set to be greater than or equal to the distance between the top of the second film 40 and the joint of the second film 40 and the connecting band 51, so that the vent 30 can be effectively ensured to be completely opened, and the ventilation efficiency in the greenhouse is improved.

Optionally, referring to fig. 1 to 3, in the ventilation and insulation device for a greenhouse according to the embodiment of the present invention, the number of the rotating wheels is three, the rotating wheels are connected to the greenhouse frame 10, the rotating wheels on two opposite sides of the ventilation opening 30 face the outer side of the greenhouse, the third rotating wheel faces the inner side of the greenhouse, and the reset member 53 is located on the inner side of the greenhouse.

In the embodiment, the three rotating wheels are arranged, so that the tensioning effect of the rotating wheels on the connecting belt is improved, and the smoothness and the stability of the movement of the connecting belt are improved.

Optionally, in the ventilation and thermal insulation device for a greenhouse provided by the embodiment of the present invention, the connection belt 51 is a pulling rope or a woven belt.

Specifically, in the present embodiment, the pulling rope may be a steel wire tensile rope or a braided rope having a high tensile strength.

In this embodiment, set the connecting band to the tensile or braid over braid of steel wire, guaranteed the pliability of connecting band on the one hand, on the other hand has guaranteed the pull resistance and the resistance to abrasion of connecting band, has effectively guaranteed the life of connecting band.

Fig. 4 is a schematic structural diagram of a first alternative implementation of a control system of a ventilation and thermal insulation device of a greenhouse according to an embodiment of the present invention. Fig. 5 is a schematic structural diagram of a second alternative implementation of a control system of a ventilation and thermal insulation device of a greenhouse according to an embodiment of the present invention. Fig. 6 is a schematic structural diagram of a third alternative implementation of a control system of a ventilation and thermal insulation device of a greenhouse according to an embodiment of the present invention. Fig. 7 is a schematic structural diagram of a fourth alternative embodiment of a control system of a ventilation and thermal insulation device for a greenhouse according to a first embodiment of the present invention.

Alternatively, referring to fig. 1 to 7, the ventilation and insulation device for a greenhouse according to the embodiment of the present invention further includes an emergency stop switch 70, wherein the emergency stop switch 70 is located at the top of the greenhouse, and the emergency stop switch 70 is connected to the driving member to turn off the driving member when the reel 61 approaches the emergency stop switch 70.

Specifically, as shown in fig. 1, in the present embodiment, two emergency stop switches 70 may be provided, and the two emergency stop switches 70 may be provided side by side along the longitudinal direction of the greenhouse. Alternatively, the emergency stop switch 70 in this embodiment may be a contact switch, and when the thermal insulation member 60 is in contact with a contact piece of the contact switch, the contact switch disconnects the power supply from the driving member, thereby stopping the movement of the reel 61. Alternatively, in the present embodiment, the emergency stop switch 70 may be an NKL inductive proximity switch available from a genuine electric appliance. The NKL inductive proximity switch is a position switch that can be operated without mechanical contact with a moving part, and can be operated without mechanical contact and pressure when the sensing surface of the object proximity switch reaches a sensing distance.

In this embodiment, by providing the emergency stop switch, when the thermal insulation assembly 60 is close to the emergency stop switch, the power supply to the driving member can be cut off, so that the problem that the scroll is excessively rolled and falls off is avoided.

Optionally, referring to fig. 1 to 7, the ventilation and insulation device for a greenhouse according to the embodiment of the present invention further includes a control system 80, the control system 80 includes a controller 81 and a position detector 82, the driving member 63 and the position detector 82 are both connected to the controller 81, the position detector 82 is located at the top and/or bottom of the greenhouse, and the position detector 82 is used for detecting the position of the reel 61;

the controller 81 is used for controlling the insulating layer 62 to drive the second film 40 to cover the ventilation opening 30 wholly or partially through the driving member 63 according to the position of the scroll 61.

Specifically, referring to fig. 1, in this embodiment, the position detector 82 may include a first position detector 821 and a second position detector 822, and optionally, the first position detector 821 may be located at the top of the greenhouse frame 10, and the second position detector 822 may be located at the bottom of the greenhouse. Alternatively, the first position detector 821 may be located at other positions on the top of the greenhouse.

Specifically, referring to fig. 1, in this embodiment, two first position detectors 821 are provided, and two second position detectors 822 are also provided, and through the two first position detectors 821 and the two second position detectors 822, the position of the scroll 61 on the greenhouse frame 10 can be accurately known, and the scrolling of the thermal insulation layer 62 by the scroll 61 is accurately controlled, so that the second film 40 is effectively controlled to completely or partially cover the vent 30, the ventilation amount of the vent 30 is effectively controlled, the environment in the greenhouse is accurately controlled, and the growth of crops in the greenhouse is facilitated. Alternatively, in the present embodiment, the position sensor 82 may be an ultrasonic sensor of model MA58MF14-7N manufactured by hamatan, japan, and the position of the heat insulating member is accurately determined by an echo of the ultrasonic wave reflected by the heat insulating member 60. Alternatively, in this embodiment, the second film 40 partially covers the ventilation opening 30, and may be one-fourth of the ventilation opening 30, one-third of the ventilation opening 30, or one-half of the ventilation opening 30, and the second film 40 specifically covers the ventilation opening 30, and the position of the rotating shaft 61 can be detected by the position sensor 82 and controlled by the driving member 63.

Further, referring to fig. 1 to 7, the ventilation and insulation device for a greenhouse according to the embodiment of the present invention further includes a bracket 11, wherein the bracket 11 is disposed on the top of the greenhouse, and the position detector 82 is disposed on the bracket 11.

Specifically, referring to fig. 1, in the present embodiment, the first position detector 821 may be located on the support 11.

Optionally, referring to fig. 1 and 2, in this embodiment, the ventilation and insulation apparatus for a greenhouse further includes a mounting groove 12, the mounting groove 12 is disposed at the bottom of the greenhouse and located outside the greenhouse, and the second position detector 822 is located in the mounting groove 12.

It should be noted that, the first position detector 821 can accurately detect the accurate position of the thermal insulation component 60 when approaching the top of the greenhouse, so as to open or cover the ventilation opening 30 to ventilate or insulate the greenhouse by controlling the position of the thermal insulation component 60; through the installation of second position detector 822, can accurately detect the accurate position of heat preservation subassembly 60 when being close to the big-arch shelter bottom to realize that heat preservation 62 covers the whole of big-arch shelter, reach heat retaining purpose. According to the difference of the greenhouse frame 10, when the heat insulation assembly is located at the middle position along the width of the greenhouse, there may be a detection blind area that is exactly located at the first position detector 821 and the second position detector 822, that is, neither the first position detector 821 nor the second position detector 822 can detect the position of the heat insulation assembly 60, but the position of the vent 30 can be selected to make the area where the vent 30 is located avoid the blind area position, so as to ensure that the system function is not affected by the existence of the blind area.

Further, referring to fig. 5 to 7, the ventilation and thermal insulation device for a greenhouse according to the embodiment of the present invention further includes a temperature sensor 83, the temperature sensor 83 is used for detecting the temperature inside and outside the greenhouse, and the temperature sensor 83 is connected to the controller 81; the controller 81 is used for controlling the driving piece to drive the reel 61 to rotate according to the temperature inside and outside the greenhouse.

Specifically, referring to fig. 5, in the present embodiment, the temperature sensor 83 may include a first temperature sensor 831 and a second temperature sensor 832, the first temperature sensor 831 may be disposed inside the greenhouse, and the second temperature sensor 832 may be disposed outside the greenhouse. In this embodiment, by arranging the first temperature sensor 831 and the second temperature sensor 832, the temperature inside and outside the greenhouse can be respectively obtained, and the controller can control the driving element to rotate the driving reel 61 according to the temperature inside and outside the greenhouse, so that the environment inside the greenhouse can be accurately controlled, and the growth of crops inside the greenhouse can be facilitated. Optionally, a plurality of first temperature sensors 831 may be provided, and optionally, the second temperature sensor 832 may not be provided. Optionally, the temperature sensor used in this embodiment may be a temperature sensor manufactured by texas instruments and having a model number of TMP275 AIDGKT.

Optionally, referring to fig. 5 to 7, the ventilation and thermal insulation device for a greenhouse according to the embodiment of the present invention further includes a humidity sensor 84, the humidity sensor 84 is used for detecting humidity inside and outside the greenhouse, and the humidity sensor 84 is connected to the controller 81; the controller 81 is used for controlling the driving member to drive the reel 61 to rotate according to the humidity inside and outside the greenhouse.

Specifically, referring to fig. 6, in this embodiment, the humidity sensor 84 may include a first humidity sensor 841 and a second humidity sensor 842. Optionally, the first humidity sensor 841 may be disposed inside the greenhouse, and the second humidity sensor 842 may be disposed outside the greenhouse. In this embodiment, through setting up first humidity transducer 841 and second humidity transducer 842, can learn the inside and outside humidity of big-arch shelter respectively, the controller can rotate drive reel 61 according to the inside and outside humidity control driving piece of big-arch shelter to the canopy internal environment of accurate control big-arch shelter does benefit to the growth of the interior crop of canopy. Optionally, a plurality of first humidity sensors 841 may be provided, and optionally, second humidity sensor 842 may not be provided. Alternatively, in this embodiment, the humidity sensor may be a texas instrument model HDC1080 humidity sensor.

Based on the foregoing example, optionally, referring to fig. 7, in another example of the present invention, the control system 80 may further include a soil sensor 85, the soil sensor 85 is disposed in the greenhouse and is used for analyzing soil in the greenhouse, and the soil sensor 85 is connected to the controller 81. The main analysis items may include soil moisture content, soil temperature, total salt in the soil, etc. Alternatively, the soil sensor 85 in this embodiment may be a JXBS-6001-TR type soil sensor manufactured by SUN TONG science and technology, Inc. Optionally, in other examples of the present invention, the control system 80 may further include a light intensity sensor 86, and the light intensity sensor 86 is disposed outside the greenhouse and is used for detecting the illumination intensity. The light intensity sensor 86 is connected to the controller 81. The controller 81 controls the driving member to rotate the reel 61 according to the intensity of the light detected by the light intensity sensor 86. Alternatively, in this embodiment, the light intensity sensor 86 may be an OPT3002DNPT light intensity sensor manufactured by texas instruments. Optionally, in other examples of the present invention, the control system 80 may further include a rain and snow sensor 87, the rain and snow sensor 87 is disposed outside the greenhouse and is used for detecting weather of the environment outside the greenhouse, and the rain and snow sensor 87 is connected to the controller 81. The controller 81 controls the driving member to rotate the reel 61 according to the weather of the environment detected by the rain and snow sensor 87. Alternatively, in the present embodiment, the rain and snow sensor 87 may be a rain and snow sensor manufactured by JXBS-3001, available from technologies, Inc.

Optionally, referring to fig. 4 to 7, in the ventilation and thermal insulation device for a greenhouse according to another example of the present invention, the control system 80 may further include a signal transmission device, a mobile terminal, and a background server, the signal transmission device is connected to the controller, the mobile terminal is connected to the background server through a signal, and the background server is connected to the signal transmission device through a signal. The background server is used for receiving the signals transmitted by the mobile terminal and sending control signals to the signal transmission equipment, and is used for receiving the signals transmitted by the signal transmission equipment and transmitting the signals to the mobile terminal.

Example two

Fig. 8 is a schematic view of the overall structure of a ventilation and thermal insulation device for a greenhouse according to a second embodiment of the present invention; fig. 9 is a left side view of a ventilation and heat preservation apparatus for greenhouses according to a second embodiment of the present invention; fig. 10 is an enlarged view of a portion of the invention at B in fig. 9. Referring to fig. 8 to 10, the ventilation and insulation device for a greenhouse according to the embodiment of the present invention includes a greenhouse frame 10, a connection assembly 50, an insulation assembly 60, and a film assembly covering the greenhouse frame, where the film assembly includes a first film 20 and a second film 40, the greenhouse frame 10 has a predetermined ventilation area, the first film 20 and the second film 40 cover the predetermined ventilation area together, and the areas covered by the first film 20 and the second film 40 are different;

the heat insulation assembly 60 comprises a reel 61, a heat insulation layer 62 wound on the reel 61 and a driving member 63 connected with the reel, wherein the driving member 63 is used for driving the reel 61 to rotate so that the heat insulation layer 62 covers the film assembly and/or is wound on the reel 61; the film assembly is connected with the heat preservation assembly 60 through the connecting assembly 50, so that the heat preservation assembly 60 drives the film assembly to be exposed or cover a preset ventilation area.

Further, according to the ventilation and heat preservation device for the greenhouse provided by the embodiment of the invention, the first film 20 and the second film 40 are partially connected or partially overlapped;

the first film 20 is connected with the heat preservation assembly 60 through the connecting assembly 50, so that the heat preservation assembly 60 drives the first film 20 to open or cover a preset ventilation area; or the second film 40 is connected with the heat preservation assembly 60 through the connecting assembly 50, so that the heat preservation assembly 60 drives the second film 40 to open or cover the preset ventilation area.

The structure of the greenhouse frame 10 and the structure of the insulating layer 62 may be the same as those of the greenhouse frame 10 and the insulating layer 62 in the first embodiment, which is not repeated herein.

Specifically, in this embodiment, the first film 20 and the second film 40 cover the greenhouse frame 10 together, the first film 20 or the second film 40 is connected to the heat insulation assembly 60 through the connection assembly 50, and the connection assembly 50 drives the first film 20 or the second film 40 to expose out of the greenhouse frame 10, so that the first film 20 or the second film 40 is in a state of not covering the greenhouse frame 10, at this time, an uncovered area of the greenhouse frame 10 is a preset ventilation area of the greenhouse frame 10, and the preset ventilation area can ventilate the inside of the greenhouse, so as to ensure the stability of the internal environment of the greenhouse and improve the growth efficiency of crops inside the greenhouse. Optionally, the preset ventilation area can be arranged at a position close to the top of the greenhouse, in the embodiment, the preset ventilation area is arranged at a position close to the top of the greenhouse, so that the uniformity of the temperature in the greenhouse under the ventilation condition in winter can be guaranteed, and the problem that the temperature of the position close to the preset ventilation area is low, the temperature of the position far away from the preset ventilation area is high and the temperature difference is too large due to the fact that the preset ventilation area is opened when the preset ventilation area is arranged at a position close to the bottom is avoided.

Alternatively, in this embodiment, the driving member 63 may be two driving motors which are connected to two ends of the winding shaft 61 and synchronously operate, and the two driving motors which synchronously operate are arranged to drive the winding shaft 61 to rotate, so that the stability of the rotation of the winding shaft 61 can be ensured. Of course, the driving member 63 in this embodiment may be a single driving motor disposed in the middle of the winding shaft 61 for saving energy while ensuring the stable rotation of the winding shaft 61. Alternatively, the driving member 63 and the winding shaft 61 in this embodiment may be connected by a coupling, a gear box or a transmission belt. Optionally, since the reel 61 moves along the greenhouse frame 10 during the process of rolling the insulation layer 62 by the reel 61 in the present embodiment, the driving member 63 in the present embodiment may also be connected to the reel in a manner of moving synchronously with the reel. Specifically, the moving manner of the driving member 63 and the reel 61 can refer to the movement of the reel and the driving member 63 of the greenhouse in the prior art, and details are not described in this embodiment.

Optionally, referring to fig. 8, in the present embodiment, the first film 20 is located on the upper half portion of the greenhouse frame 10, and the second film 40 is located on the lower half portion of the greenhouse frame 10; or the first film 20 is positioned at the lower half part of the greenhouse frame 10, and the second film 40 is positioned at the upper half part of the greenhouse frame 10, as long as the first film 20 and the second film 40 jointly cover the greenhouse frame 10. The first film 20 and the second film 40 cover the greenhouse framework 10 together, so that the purpose of lighting and heat preservation of the greenhouse is achieved, and the growth of crops is facilitated. Optionally, at the position where the first film 20 and the second film 40 are partially connected or partially overlapped, the film near the top of the greenhouse covers the film near the bottom of the greenhouse, so that rainwater cannot enter the interior of the greenhouse when flowing from the top of the greenhouse to the bottom of the greenhouse along the films.

Optionally, the first film 20 and the second film 40 are rectangular, and have four edges, and the edges except the edge where the first film 20 and the second film 40 are connected or partially overlapped are connected with the greenhouse frame 10 or respectively connected with the greenhouse frame and the ground. The connection with the greenhouse framework and/or the ground ensures the sealing performance of the greenhouse, and simultaneously improves the wind resistance of the first film 20 and the second film 40. Optionally, the film pressing rope is arranged in the width direction of the greenhouse, one end of the film pressing rope is connected with the top of the greenhouse, the other end of the film pressing rope is connected with the bottom of the greenhouse, the first film 20 and the second film 40 are ensured to be in a tensioning and unfolding state due to the existence of the film pressing rope, the light transmittance is improved, the wind resistance is improved, and the growth of crops and the service life of the greenhouse are facilitated. Optionally, the greenhouse can be provided with a plurality of film pressing ropes along the length direction, and 1 film pressing rope can be arranged at intervals of about 1 meter.

Specifically, referring to fig. 8, during the process of driving the roller 61 to rotate from the top of the greenhouse to the bottom of the greenhouse, the heat-insulating layer 62 is gradually moved from being wound on the roller 61 to cover a part of the first film 20, to cover the whole part of the first film 20, and to cover a part of the second film 40, until the whole part of the second film 40 is covered; or the roll 61 is rotated, the heat-insulating layer 62 is gradually moved from the roll 61 to cover all of the second film 40, all of the first film 20, and all of the first film 20. The heat preservation layer 62 covers the first film 20 and the second film 40 completely, and the purpose of preserving heat of the interior of the greenhouse at night is achieved. In the process that the driving part 63 drives the reel 61 to rotate from the bottom of the greenhouse to the top of the greenhouse, the heat-insulating layer 62 is gradually wound on the reel 61 from the first film 20 and the second film 40, so that the purposes of lighting and heat insulation are achieved.

In another implementation, the greenhouse frame 10 is of an all-steel frame connected arch structure, the first film 20 and the second film 40 jointly cover the greenhouse frame, and the greenhouse comprises a left semicircular side surface, a right semicircular side surface and an upper arc surface. The insulation 62 is located on the arc-shaped surface, and the insulation 62 can only cover the part of the first film 20 and the second film 40 located on the arc-shaped surface when the roller 61 rotates from the top of the greenhouse to the bottom of the greenhouse. Optionally, a plurality of heat preservation assemblies 60 may be arranged in the length direction of the greenhouse. The plurality of heat preservation assemblies 60 arranged along the length direction of the greenhouse are suitable for the condition that the length of the greenhouse is long, and because the length of the reel 61 is too long, the power of the conventional driving piece 63 cannot meet the use requirement under the condition that only one heat preservation assembly 60 is arranged; optionally, two heat preservation assemblies 60 can be arranged in the width direction of the greenhouse, and optionally, the two heat preservation assemblies 60 can share one heat preservation layer 62. The two heat preservation assemblies 60 are arranged in the width direction of the greenhouse, the greenhouse is suitable for the greenhouse adopting the all-steel-frame integrated arch structure, the heat preservation assemblies are respectively arranged on the front side and the rear side of the arc-shaped surface (facing the greenhouse, the left side and the right side are semicircular surfaces and the upper volume is the arc-shaped surface) in the greenhouse adopting the all-steel-frame integrated arch structure, and the common heat preservation layer 62 can reduce the installation difficulty and the installation cost.

In a specific implementation, a plurality of ventilation and heat preservation devices of the greenhouse provided by the embodiment of the invention can be arranged in the length direction of the greenhouse. Specifically, the connecting assembly 50 is arranged at intervals of about 1.5 meters, so that the heat preservation assembly 60 can drive the film assembly to open a preset ventilation area uniformly along the length direction of the greenhouse, and the greenhouse is ventilated.

According to the ventilation and heat preservation device for the greenhouse provided by the embodiment of the invention, the greenhouse framework is covered by the first film and the second film, the first film or the second film is connected with the heat preservation assembly through the connecting assembly, the first film or the second film is driven to be exposed out of the greenhouse framework through the connecting assembly, so that the first film or the second film is in a state of not covering the greenhouse framework, and at the moment, the uncovered area of the greenhouse framework is the preset ventilation area of the greenhouse framework. So, through the operation of opening (covering) the heat preservation, realized exposing the ventilation zone of predetermineeing of big-arch shelter skeleton and ventilated in to the canopy of big-arch shelter, through the operation that covers (opening) the heat preservation, realized covering the big-arch shelter and predetermine the ventilation zone and keep warm in order to the canopy of big-arch shelter. The complex operation is avoided, the accuracy of controlling the environment in the greenhouse of the greenhouse is improved, and the growth of crops in the greenhouse is facilitated.

Alternatively, referring to fig. 8 to 10, in the ventilation and insulation device for greenhouses according to the embodiment of the present invention, the connection assembly 50 includes a tension band 54, a connection band 51, a rotation member 52, and a return member 53, the tension band 54 is located between the first film 20 or the second film 40 and the insulation layer 62, one end of the tension band 54 is connected to the reel 61, the other end of the tension band 54 is connected to the top of the greenhouses, and the tension band 54 is rolled together with the insulation layer 62; the connecting belt 51 is wound on the rotating part 52, the connecting belt 51 is positioned between the tension belt 54 and the reset part 53, and the connecting belt 51 is respectively connected with the tension belt 54 and the reset part 53; first film 20 or second film 40 is attached to attachment strap 52.

Specifically, in this embodiment, the rotating member 52 may be a fixed pulley, the connecting belt 51 is wound on the fixed pulley, and the fixed pulley is used for defining a movement track of the connecting belt 51, so as to ensure that the heat preservation assembly 60 drives the first film 20 or the second film 40 to move along the greenhouse frame 10 through the tension belt 54 and the connecting belt 51 to open or cover a preset ventilation area to ventilate or preserve heat of the greenhouse, and ensure that the connecting belt 51 can be connected with the reset member 53 at a predetermined position to ensure normal opening and closing of the preset ventilation area by defining the movement track of the connecting belt 51.

Alternatively, in this embodiment, the restoring member 53 may be a lead weight or an iron weight. In this embodiment, the connecting belt 51 can be tensioned through the resetting piece 53 and the rotating piece 52, so that the situation that the first film 20 or the second film 40 cannot cover (open) the preset ventilation area when the reel 62 moves from the top of the greenhouse to the bottom of the greenhouse is avoided, the linkage between the first film 20 or the second film 40 and the heat preservation assembly 60 is improved, the stability of the environment in the greenhouse is effectively guaranteed, and the growth of crops in the greenhouse is facilitated. Specifically, the reset piece 53 ensures that the connecting belt 51 is in a tensioning state through the self gravity, when the scroll 61 moves towards the top of the greenhouse, the heat preservation assembly 60 drives the tension belt 54, the tension belt 54 drives the connecting belt 51, and the connecting belt 51 drives the film assembly and the reset assembly 53 to move, so that the purpose of opening (closing) a preset ventilation area by the film assembly is realized; when the scroll 61 moves from the top of the greenhouse to the bottom, the heat preservation assembly 60 drives the tension belt 54 to move downwards, the tension belt 54 drives one end of the connecting belt 51 connected with the tension belt 54 to move downwards, the reset piece 53 drives the other end of the connecting belt 51 connected with the reset piece 53 to move downwards, and the connecting belt 51 drives the film assembly to move, so that the preset ventilation area is closed (opened).

Optionally, in this embodiment, the resetting element 53 may also be an elastic resetting element having one end connected to the greenhouse frame 10 or the ground or the film pressing rope, and the other end connected to the connecting band 51, and optionally, the elastic resetting element may be an elastic resetting element such as a tension spring or a rubber band. In order to ensure the normal operation of the elastic resetting element, the elastic resetting element is required to be in a stretching state, and the operation principle of the elastic resetting element is consistent with the principle that the connecting belt 51 is tensioned under the action of gravity, which is not described herein again.

Optionally, the connecting belt 51 is a pulling rope or a woven belt, the pulling belt 54 may be a pulling rope or a woven belt, and the pulling rope may be a steel wire rope, a plastic rope, a nylon rope, or the like. In the embodiment, the tension belt 54 is set to be a steel wire rope with the diameter of 2.0 mm, so that the rolling of the insulating layer 62 cannot be influenced due to the fact that the tension belt 54 is too thick under the condition that the stress meets the requirement, and meanwhile, the service life of the tension belt 54 is prolonged. Set connecting band 51 to the nylon rope, guaranteed connecting band 51's pliability on the one hand, guaranteed connecting band 51's pull resistance and abrasion resistance on the other hand, effectively guaranteed connecting band 51's life.

Alternatively, the tension bands 54 may be eliminated and the insulation layer 62 replaces the function of the tension bands 54. The present embodiment is not limited herein. The insulating layer 62 replaces the tension belt 54 to be directly connected with the connecting belt 51, so that resources are saved.

Optionally, when the reel 51 is located at the bottom of the greenhouse, the tension belt 54 is laid between the insulation layer 62 and the film assembly in the width direction of the greenhouse, and the connection point of the connection belt 51 and the tension belt 54 is located on the tension belt 54 and is between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the position of the top of the greenhouse, so that when the reel 51 moves from the top of the greenhouse to the bottom of the greenhouse, and when the reel moves to the connection point of the connection belt 51 and the tension belt 54, the connection belt 51 cannot continue to move downward under the drive of the insulation assembly 60, and the situation that the connection assembly 50 is damaged by excessive movement of the connection belt 51 can be avoided.

Optionally, when the tension band is a steel cable, a steel cable bayonet can be used to clamp the steel cable, a nut hanging ring is fixed on the bayonet screw, and then the connecting band 51 is connected to the nut hanging ring to complete the connection between the connecting band 51 and the tension band 54.

Optionally, the connection of the connection belt 51 and the first film 20 or the second film 40 may use a ship-shaped air release device for the greenhouse, at this time, the connection belt 51 is divided into two sections, one end of the first section is connected with the reset piece 53, and the other end is connected with the ship-shaped air release device for the greenhouse; one end of the second section is connected with the tension belt 54, and the other end is connected with the ship-shaped air release device of the greenhouse. The use of the ship-shaped air release device for the greenhouse simplifies the installation process, and the use of the ship-shaped air release device for the greenhouse avoids the occurrence of the situation that the first film 20 or the second film 40 is folded in a double layer in the preset ventilation area after moving along with the connecting belt 52 at the edge.

Optionally, when the heat insulation layer 62 is rolled up to the top end of the greenhouse by the reel 61, the reel 61 is mostly bent, in order to ensure that the heat insulation assembly drives the first film 20 or the second film 40 to uniformly open the preset ventilation area, when the reel 61 is located at the top end of the greenhouse, the connection position of the tension belt 54 and the connection belt 51 is selected according to the size and the state of the preset ventilation area required by the position, so that the consistency of the preset ventilation area when the reel 61 is located at the top end of the greenhouse is ensured, and the unevenness of opening or covering the preset ventilation area due to the bending of the reel 61 can be avoided. Optionally, the connection between the connection belt 51 and the pulling belt 54 is externally positioned between the rotating member 52 near the top of the greenhouse and the top of the greenhouse, so as to prevent the rolling shaft 61 from repeatedly opening or covering the preset ventilation area when rolling towards the bottom of the greenhouse.

Optionally, the reset element 53 is located outside the greenhouse, the number of the rotating elements 52 is at least one, and at least one rotating element 52 is located outside the greenhouse.

Optionally, when the rotating member 52 is located inside the greenhouse, the rotating member 52 may be fixed on the greenhouse frame 10, or may be detachably disposed on the greenhouse frame 10. When the fixed pulleys are positioned on the outer side of the greenhouse, the rotating piece 52 is connected to the film pressing rope. Optionally, a steel pipe is installed outside the greenhouse, the length of the steel pipe is the same as that of the greenhouse, two ends of the steel pipe are fixed on the greenhouse framework, and the rotating member 52 outside the greenhouse is connected to the steel pipe. The use of the steel pipe ensures the convenience of mounting the plurality of outer rotating members 52 of the greenhouse. Optionally, a steel pipe is installed inside the greenhouse, the length of the steel pipe is the same as that of the greenhouse, the steel pipe is fixed on the greenhouse framework, and the rotating member 52 inside the greenhouse is connected to the steel pipe. The use of the steel pipe ensures the convenience of mounting the plurality of inner rotating pieces 52 of the greenhouse.

Specifically, the reset piece 53 positioned outside the greenhouse can be an elastic reset piece such as a rubber band or a spring, one end of the reset piece 53 is connected with the top or the bottom of the greenhouse or a film pressing rope, the other end of the reset piece is connected with the connecting band 51, and at least one greenhouse rotating piece 52 is used for limiting the movement track of the connecting band 51 so as to ensure that the edge of the first film 20 or the second film 40 moves along the greenhouse framework 10 under the action of the connecting band 51 to open or cover the preset ventilation area and prevent the first film 20 or the second film 40 from being damaged.

Optionally, the resetting piece 53 may be a rubber band, one end of the rubber band is connected to the position of the film pressing rope of the greenhouse close to the bottom of the greenhouse, and the other end of the rubber band is connected to the connecting band 51. Optionally, a rotating member 52 is disposed outside the greenhouse and between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the top of the greenhouse, the connecting belt 51 is connected with the first film 20 or the second film 40 from one end connected with the reset member 53, then bypasses the rotating member 52 from below the rotating member 52, and finally the other end of the connecting belt 51 is connected with the pulling belt 54. Optionally, the number of the rotating members 52 is two, one rotating member 52 is disposed at the outer side of the greenhouse, the other rotating member 52 is disposed at the inner side of the greenhouse, the rotating member 52 at the outer side is located between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the bottom of the greenhouse, the rotating member 52 at the inner side is located between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the top of the greenhouse, the connecting belt 51 penetrates the inner side of the greenhouse from one end connected with the reset member 53 through the position where the first film 20 and the second film 40 are partially connected or partially overlapped, bypasses the rotating member 52 at the lower side of the rotating member 52 at the inner side, and then penetrates out of the greenhouse from the position where the first film 20 and the second film 40 are partially, and is connected to the first film 20 or the second film 40 at this point, and then passes under the outer rotating member 52, and finally the other end of the connecting strap 51 is connected to the tension strap 54. This structure has ensured that spool 61 when moving to big-arch shelter top direction, opens (closes) and predetermines the ventilation zone so that the big-arch shelter ventilates (keeps warm), and spool 61 is when moving to big-arch shelter bottom direction, closes (opens) and predetermines the ventilation zone to make big-arch shelter keep warm (ventilate).

Optionally, the resetting piece 53 may be a rubber band, one end of the rubber band is connected to the top of the greenhouse, and the other end of the rubber band is connected to the connecting band 51. Optionally, a rotating member 52 is disposed outside the greenhouse and between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the bottom of the greenhouse, the connecting belt 51 is connected with the first film 20 or the second film 40 from the end connected with the reset member 53, and then bypasses the rotating member 52 from below the rotating member 52, and finally the other end of the connecting belt 51 is connected with the pulling belt 54. Optionally, the number of the rotating members 52 is three, two rotating members 52 are arranged on the outer side of the greenhouse, one rotating member 52 is arranged on the inner side of the greenhouse, two rotating members 52 on the outer side are arranged between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the bottom of the greenhouse, one rotating member 52 on the inner side is arranged between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the top of the greenhouse, the connecting belt 51 is wound from the end connected with the resetting member 53 above the first rotating member on the outer side of the greenhouse, penetrates into the inner side of the greenhouse from the position where the first film 20 and the second film 40 are partially connected or partially overlapped, is wound around the inner rotating member 52 from the lower side of the inner rotating member 52, penetrates out of the greenhouse from the position where the first film 20 and the second film 40 are partially connected or partially overlapped, and is connected with the first film 20 or the second film, then, the other rotating member 52 is passed under the other rotating member, and finally, the other end of the connecting belt 51 is connected to the tension belt 54. This structure has ensured that spool 61 when moving to the big-arch shelter top, opens (closes) and predetermines the ventilation zone so that the big-arch shelter ventilates (keeps warm), and when the spool was 61 to the big-arch shelter bottom motion, closed (opened) and predetermine the ventilation zone to make the big-arch shelter keep warm (ventilate).

Alternatively, referring to fig. 8 to 10, in the ventilation and insulation device for a greenhouse according to the embodiment of the present invention, the returning member 53 is located inside the greenhouse, the number of the rotating members 52 is at least two, and the rotating members 52 are respectively located on two sides of the overlapping position or two sides of the connecting position of the first film 20 and the second film 40.

Optionally, the number of the rotating members 52 is two, one rotating member 52 is disposed on the outer side of the greenhouse, the other rotating member 52 is disposed on the inner side of the greenhouse, the rotating member 52 on the outer side is located between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the bottom of the greenhouse, the rotating member 52 on the inner side is located between the position where the first film 20 and the second film 40 are partially connected or partially overlapped and the top of the greenhouse, the connecting belt 51 is connected with the first film 20 or the second film 40 at the position where the connecting belt 51 is connected from one end connected with the reset member 53, bypasses the upper side of the rotating member 52 on the inner side, passes through the greenhouse from the position where the first film 20 and the second film 40 are partially connected or partially overlapped, then bypasses the lower side of the rotating member 52 on the outer side, and finally the other end of the connecting belt 51. This structure has ensured that spool 61 when moving to the big-arch shelter bottom, opens (closes) and predetermines the ventilation zone so that the big-arch shelter ventilates (keeps warm), and when the spool was 61 moved to the big-arch shelter top, closed (opened) and predetermine the ventilation zone to make the big-arch shelter keep warm (ventilate).

Alternatively, referring to fig. 8 to 10, in the ventilation and insulation device for a greenhouse according to the embodiment of the present invention, the number of the rotating members 52 is four, two rotating members 52 are respectively disposed on two sides of the overlapping position or two sides of the connecting position of the first film 20 and the second film 40, the rotating member 52 on the first film 20 side faces the outer side of the greenhouse, the two rotating members 52 on the second film 40 side face the inner side of the greenhouse, and the reset member 53 is located on the inner side of the greenhouse.

The connecting belt 51 passes over the rotating member 52 from the inner one of the rotating members 52 from the end connected to the return member 53, passes through the greenhouse from the position where the first film 20 and the second film 40 are partially connected or partially overlapped, passes over the rotating member 52 from the outer one of the rotating members 52, passes through the greenhouse from the position where the first film 20 and the second film 40 are partially connected or partially overlapped, is connected to the second film 40 at the position, passes over the rotating member 52 from the lower side of the inner other rotating member 52, passes through the greenhouse from the position where the first film 20 and the second film 40 are partially connected or partially overlapped, passes over the rotating member 52 from the lower side of the outer other rotating member 52, and finally, the other end of the connecting belt 51 is connected to the tension belt 54. This structure has ensured that spool 61 when moving to the big-arch shelter top, opens and predetermines the ventilation zone so that the big-arch shelter ventilates, and when the spool was moved to the big-arch shelter bottom, closed and predetermine the ventilation zone to make the big-arch shelter keep warm.

Optionally, according to the structure of the connection assembly 50, when the scroll 51 rolls towards the top of the greenhouse, the preset ventilation area is opened, and when the scroll 51 rolls towards the bottom of the greenhouse, the preset ventilation area is closed. Specifically, in the morning in winter, under a proper condition, the reel 51 rotates from the bottom position of the greenhouse to the top position of the greenhouse, the pull belt 54 is wound on the reel 51 along with the insulating layer 62 to expose the first film 20 and/or the second film 40, so as to ensure good illumination conditions of the greenhouse, ensure the temperature inside the greenhouse to rise, provide good temperature conditions and photosynthesis conditions for the growth of crops, and when the reel 61 is wound to the connecting point position of the pull belt 54 and the connecting belt 51, the rotation is stopped, so as to ensure that a preset ventilation area is not opened, and the continuous rise of the temperature of the greenhouse is ensured; arrive at the midday afternoon, under the good condition of illumination condition, the temperature in the canopy lasts to rise, in order to ensure that the temperature is fit for crop growth in the canopy, control reel 61 moves suitable distance to the big-arch shelter top, and heat preservation subassembly 60 drives first film 20 or second film 40 through coupling assembling 50 and opens and predetermine the ventilation zone this moment, to ventilating in the canopy, when guaranteeing that the temperature is suitable in the canopy, also for having carried out the air exchange in the canopy with the shed outside, provide the required carbon dioxide of photosynthesis for the crop. After noon, the illumination condition weakens, and the temperature begins to descend in the canopy, and control spool 61 downward motion this moment stops the motion after closing up to predetermineeing the ventilation zone to the temperature is fit for crop growth in the guarantee canopy. In the afternoon, along with the continuous weakening of the illumination condition, the control reel 51 moves towards the bottom of the greenhouse, and the heat-insulating layer 62 completely covers the film assembly so as to insulate the interior of the greenhouse.

Optionally, according to the structure of the connection assembly 50, when the scroll 51 rolls towards the top of the greenhouse, the preset ventilation area is closed, and when the scroll 51 rolls towards the bottom of the greenhouse, the preset ventilation area is opened. Specifically, in the morning in winter, under appropriate conditions, the reel 61 rotates from the bottom position of the greenhouse to the top position of the greenhouse, the pull belt 54 is wound on the reel 61 along with the insulating layer 62 to expose the first film 20 and/or the second film 40, so as to ensure good illumination conditions of the greenhouse, so as to ensure temperature rise in the greenhouse, provide good temperature conditions for crop growth, and ensure good photosynthesis conditions of crops, when the reel 51 is wound to a position where the first film 20 and the second film 40 are partially connected or partially overlapped, the preset ventilation area is in an open state, the reel 61 continuously rotates towards the top of the greenhouse, when the reel 61 reaches a connection point position of the pull belt 54 and the connection belt 51, the reel 61 continuously rotates towards the top of the greenhouse, and at the time, the insulating assembly 60 drives the first film 20 or the second film 40 to cover the preset ventilation area through the connection assembly 50, when the preset ventilation area is completely closed, the reel 61 stops rotating to ensure the continuous rise of the temperature in the greenhouse and prevent the heat preservation assembly 60 from falling to the rear side of the greenhouse from the top of the greenhouse; arrive at the midday afternoon, under the good condition of illumination condition, the temperature lasts to rise in the canopy, in order to ensure that the temperature is fit for crop growth in the canopy, control reel 61 moves suitable distance to big-arch shelter bottom direction, and heat preservation subassembly 60 drives first film 20 or second film 40 through coupling assembling 50 and opens and predetermine the ventilation zone this moment, to ventilating in the canopy, when guaranteeing that the temperature is suitable in the canopy, also for having carried out the air exchange in the canopy with the shed outside, provide the required carbon dioxide of photosynthesis for the crop. After noon, the illumination condition weakens, and the temperature begins to descend in the canopy, and control spool upward movement this moment closes until predetermineeing the ventilation zone to the temperature is fit for crop growth in the guarantee canopy. In the afternoon, as the illumination condition continuously weakens, the reel 61 needs to be controlled to move towards the bottom of the greenhouse, before reaching the position of the connection point of the tension belt 54 and the connection belt 51, the heat insulation assembly 60 drives the first film 20 or the second film 40 to open the preset ventilation area through the connection assembly 50, the reel 51 is controlled to continue to move towards the bottom of the greenhouse, and the heat insulation layer gradually covers the preset ventilation area until all the film assemblies are covered, so that heat insulation is carried out on the interior of the greenhouse.

Optionally, the ventilation and thermal insulation device for a greenhouse provided in the embodiment of the present invention further includes an emergency stop switch 70, wherein the structure, position, and working principle of the emergency stop switch 70 are the same as those of the above embodiment, and this embodiment is not described herein again.

Optionally, the ventilation and thermal insulation device for a greenhouse provided in the embodiment of the present invention further includes a control system 80, wherein the structure and the working principle of the control system 80 are the same as those of the above-mentioned embodiment, and this embodiment is not described herein again. The difference between the control system 80 in this embodiment and the control system 80 in the first embodiment is that in the control system 80 in this embodiment, the position detector 82 is located at the top, bottom, or side of the greenhouse, or the position detector 82 is located above the top of the greenhouse, and the controller 81 is configured to control the heat-insulating assembly 60 to drive the first film 20 to completely cover or partially cover the preset ventilation area through the driving member 63 according to the position of the reel 61, or control the heat-insulating assembly 60 to drive the second film 40 to completely cover or partially cover the preset ventilation area through the driving member 63, so as to effectively control the ventilation amount of the preset ventilation area, accurately control the environment in the greenhouse, and facilitate the growth of crops in the greenhouse.

In this embodiment, the position detector 82 may be located not only on the top bracket 11 of the greenhouse and/or on the bottom mounting groove 12 of the greenhouse in the first embodiment, but also on the rocker arm assembly 82, as shown in fig. 8, alternatively, when the position detector 82 is located above the top of the greenhouse, the position detector 82 is located on the rocker arm assembly 64, specifically, the rocker arm assembly 64 includes a first connecting arm, a second connecting arm and a cable, and the position detector 82 is connected with the cable to implement power supply and data communication to the position sensor 82. First linking arm and second linking arm are articulated, and first linking arm is articulated with the bottom of big-arch shelter, and the second linking arm is articulated with driving piece 63, and the cable is connected with driving piece 63, and this connected mode has guaranteed that driving piece 63 is along with spool 61 synchronous motion when, the stability of driving piece 63 to and the transmission of the power supply of guarantee driving piece and control signal. Optionally, the position detector 82 may be disposed on the first connecting arm, or on the first connecting arm and the second connecting arm, and the position detector 82 detects the position of the reel 61 by detecting the relative position between the first connecting arm and the ground, or the relative position between the first connecting arm and the second connecting arm, so as to effectively control the ventilation volume of the preset ventilation area, accurately control the environment in the greenhouse of the greenhouse, and facilitate the growth of crops in the greenhouse.

Alternatively, the position detector 82 can be a tilt sensor measurement of HT2D485-S90 of Shenzhenmelang technology.

Optionally, in this embodiment, the position detector 82 may be located on the side of the greenhouse. Optionally, bearings are assembled at the tail ends of the reels 61 on the two sides of the greenhouse, one end of a rocker arm with a variable arm length is connected with the bearings, and the other end of the rocker arm is hinged with the ground. When the reel rolls on the greenhouse, one end of the rocker arm, which is hinged with the ground, rotates around a hinged point, and the other end of the rocker arm synchronously moves along with the reel 61. Alternatively, the arm length can be changed by sleeving two or more steel pipes with different diameters together. Optionally, the tilt angle sensor of HT2D485-S90 of Shenzhen milang technology can be installed on the rocker arm, and the position of the scroll 61 is determined by measuring the angle between the rocker arm and the ground, so that the ventilation volume of the preset ventilation area is effectively controlled, the environment in the greenhouse of the greenhouse is accurately controlled, and the growth of crops in the greenhouse is facilitated.

EXAMPLE III

Fig. 11 is a schematic view of an overall structure of a ventilation and thermal insulation device for a greenhouse according to a third embodiment of the present invention. Referring to fig. 11, the ventilation and insulation device for a greenhouse according to the embodiment of the present invention includes a greenhouse frame 10, a connection assembly 50, an insulation assembly 60, and a film assembly covering the greenhouse frame, where the film assembly includes a first film 20 and a second film 40, the greenhouse frame 10 has a preset ventilation area, the first film 20 and the second film 40 cover the preset ventilation area together, and the areas covered by the first film 20 and the second film 40 are different;

the heat insulation assembly 60 comprises a reel 61, a heat insulation layer 62 wound on the reel 61 and a driving member 63 connected with the reel, wherein the driving member 63 is used for driving the reel 61 to rotate so that the heat insulation layer 62 covers the film assembly or is wound on the reel 61; the film assembly is connected with the heat preservation assembly 60 through the connecting assembly 50, so that the heat preservation assembly 60 drives the film assembly to be exposed or cover a preset ventilation area.

Further, the first film 20 covers the greenhouse frame 10, the first film 20 is provided with a vent to form a preset ventilation area, the second film 40 is connected with the first film 20, the second film 40 covers the vent, and the driving element is used for driving the reel 61 to rotate so that the heat insulation layer 62 covers the first film 20 or is wound on the reel 61;

the second membrane 20 is connected to the insulating layer 62 by the connecting member 50 so that the insulating layer 62 carries the second membrane 40 to open or cover the ventilation opening.

In this embodiment, the structure and the working principle of the greenhouse frame 10, the second film 40, the first film 20, the connecting assembly 50 and the heat preservation assembly 60 are the same as those of the first embodiment, and the description of this embodiment is omitted.

Optionally, the ventilation and thermal insulation device for a greenhouse provided in the embodiment of the present invention further includes a control system 80, wherein the structure and the working principle of the control system 80 are the same as those of the above embodiment, and this embodiment is not described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The ventilation and heat preservation device for the greenhouse is characterized by comprising a greenhouse framework, a connecting assembly, a heat preservation assembly and a film assembly, wherein the film assembly covers the greenhouse framework and comprises a first film and a second film, a preset ventilation area is arranged on the greenhouse framework, the first film and the second film cover the preset ventilation area together, and the areas covered by the first film and the second film are different;

the heat insulation assembly comprises a scroll, a heat insulation layer wound on the scroll and a driving piece connected with the scroll, and the driving piece is used for driving the scroll to rotate so that the heat insulation layer covers the film assembly and/or is wound on the scroll;

the film assembly and the heat preservation assembly are connected through the connecting assembly, so that the heat preservation assembly drives the film assembly to be exposed or covered on the preset ventilation area.

2. The greenhouse ventilation and insulation device as claimed in claim 1, wherein the first film is covered on the greenhouse frame, the first film is provided with a ventilation opening to form the preset ventilation area, the second film is connected with the first film and covers the ventilation opening, and the driving member is used for driving the reel to rotate so that the insulation layer is covered on the first film or wound on the reel;

the second film with the heat preservation passes through coupling assembling connects, so that the heat preservation drives the second film is opened or is covered the vent.

3. The ventilation and insulation device for greenhouses according to claim 1, wherein the first film and the second film are partially joined or partially overlapped;

the first film is connected with the heat insulation assembly through the connecting assembly, so that the heat insulation assembly drives the first film to open or cover the preset ventilation area; or the second film and the heat preservation assembly are connected through the connecting assembly, so that the heat preservation assembly drives the second film to open or cover the preset ventilation area.

4. The ventilation and insulation device for greenhouses as claimed in claim 3, wherein the connection assembly comprises a tension band, a connection band, a rotation member and a return member, the tension band is located between the first film or the second film and the insulation layer, one end of the tension band is connected to the reel, the other end of the tension band is connected to the top of the greenhouse, and the tension band is rolled together with the insulation layer; the connecting belt is wound on the rotating piece, is positioned between the tension belt and the reset piece and is respectively connected with the tension belt and the reset piece; the first film or the second film is connected with the connecting band.

5. The ventilation and insulation device for greenhouses as claimed in claim 4, wherein the return member is located outside the greenhouse, the number of the rotating members is at least one, and at least one of the rotating members is located outside the greenhouse.

6. The ventilation and thermal insulation device for greenhouses as claimed in claim 4, wherein the return member is located inside the greenhouses, the number of the rotating members is at least two, and the rotating members are respectively located on both sides of the overlapping position or the connecting position of the first film and the second film.

7. The ventilation and thermal insulation device for the greenhouse of claim 4, wherein the connecting belts are pulling ropes or woven belts; the tension belt is a pull rope or a woven belt.

8. The greenhouse ventilation and insulation device of claim 3, further comprising an emergency stop switch located at the top of the greenhouse, the emergency stop switch being connected to the drive member to turn off the drive member when the reel is proximate to the emergency stop switch.

9. The greenhouse ventilation and insulation device as claimed in claim 3, further comprising a control system, wherein the control system comprises a controller and a position detector, the driving member and the position detector are both connected with the controller, and the position detector is positioned at the top or the bottom or the side of the greenhouse; or the position detector is positioned above the greenhouse and used for detecting the position of the reel;

the controller is used for controlling the heat preservation assembly to drive the first film to completely cover or partially cover the preset ventilation area through the driving piece according to the position of the reel; or the driving piece controls the heat insulation assembly to drive the second film to completely cover or partially cover the preset ventilation area.

10. The ventilation and insulation device of greenhouse of claim 9, further comprising a bracket or a swing arm assembly, wherein the bracket is arranged on the top of the greenhouse, and the position detector is positioned on the bracket or the swing arm assembly;

the rocking arm subassembly includes first linking arm, second linking arm and cable, the position detector with cable junction, first linking arm with the second linking arm is connected, first linking arm with the bottom of big-arch shelter is connected, the second linking arm with the driving piece is connected, the cable with the driving piece is connected.

11. A ventilation and heat preservation device of a greenhouse comprises a greenhouse framework and a first film covered on the greenhouse framework, wherein the first film is provided with a vent;

the second film is connected with the first film, and the second film covers the ventilation opening;

12. The ventilation and thermal insulation device for the greenhouse of claim 11, wherein the connection assembly comprises a connection band, a rotating member and a reset member, the connection band is wound around the rotating member, the connection band is located between the thermal insulation layer and the reset member, and the connection band is respectively connected with the thermal insulation layer and the reset member; the second film is connected with the connecting band.

13. The ventilation and insulation device for greenhouses as claimed in claim 12, wherein said rotatable member comprises at least two rotatable wheels, said rotatable wheels are located on opposite sides of said ventilation opening, and the connection point of said second membrane and said connection band is located between said rotatable wheels on opposite sides of said ventilation opening.