Ventilation and heat preservation device for greenhouse

Abstract

The present invention provides a ventilation and heat preservation device for a greenhouse, which comprises a greenhouse framework, a connection component, a heat preservation component and a film component covering the greenhouse framework. The film component includes a first film and a second film. There is a preset ventilation area on the greenhouse framework. The first film and the second film jointly cover the preset ventilation area, and the areas covered by the first film and the second film are different. The heat preservation component includes a reel, a heat preservation layer wound on the reel and a driving member connected to the reel. The driving member is used to drive the reel to rotate so that the heat preservation layer covers the film component and / or is wound on the reel. The film component and the heat preservation component are connected through the connection component so that the heat preservation component drives the film component to expose or cover the preset ventilation area. The ventilation and heat preservation device for the greenhouse provided by the present invention can simultaneously control the operation of opening the heat preservation layer and ventilating the interior of the greenhouse.

Description

Technical Field

[0001] The present invention relates to the technical field of agriculture, and particularly to a ventilation and heat preservation device for a greenhouse. Background Art

[0002] A greenhouse is a frame film covering system with excellent heat preservation performance. Generally, a greenhouse mainly consists of a greenhouse framework and a plastic film covering the greenhouse framework. The plastic film has heat preservation properties. After covering the plastic film, the temperature inside the greenhouse increases with the increase of the external light intensity and temperature. Due to the heat preservation property of the plastic film, when the sun is sufficient at noon, the temperature inside the greenhouse is relatively high. Therefore, it is necessary to ventilate and cool the greenhouse. And at night, the external environmental temperature is relatively low, so it is necessary to keep the greenhouse warm. Thus, by heat preservation and ventilation and cooling, the temperature inside the greenhouse is maintained at a temperature suitable for crop growth, which is 15 - 30°C.

[0003] In the prior art, the greenhouse keeps the temperature inside the greenhouse by covering a heat preservation layer on the plastic film, and ventilates and cools the greenhouse by setting ventilation openings on the greenhouse. Among them, the heat preservation layer is rolled up and put down by setting a reel and driving members arranged at both ends of the reel to realize the retraction and covering of the heat preservation layer. Then, the ventilation opening is manually opened by a person to realize the ventilation and cooling of the greenhouse.

[0004] However, in the prior art, the rolling up and putting down of the heat preservation layer and the opening and closing of the ventilation opening of the greenhouse are controlled independently of each other, which increases the installation and control costs, and the operation is complex, which is not conducive to accurately controlling the environment inside the greenhouse and is not conducive to the growth of crops. Summary of the Invention

[0005] The embodiments of the present invention provide a ventilation and heat preservation device for a greenhouse to solve the problem that in the prior art, the rolling up and putting down of the heat preservation layer of the greenhouse and the opening and closing of the ventilation opening of the greenhouse are controlled independently of each other, the operation is complex, and it is not conducive to accurately controlling the environment inside the greenhouse.

[0006] The embodiments of the present invention provide a ventilation and heat preservation device for a greenhouse, including a greenhouse framework, a connection component, a heat preservation component, and a film component covering the greenhouse framework. The film component includes a first film and a second film. There is a preset ventilation area on the greenhouse framework. The first film and the second film jointly cover the preset ventilation area, and the areas covered by the first film and the second film are different.

[0007] The heat preservation component includes a reel, a heat preservation layer wound on the reel, and a driving member connected to the reel. The driving member is used to drive the reel to rotate so that the heat preservation layer covers the film component and / or is wound on the reel.

[0008] The film component is connected to the heat preservation component through the connection component so that the heat preservation component drives the film component to expose or cover the preset ventilation area.

[0009] As an alternative, for the ventilation and heat preservation device of the greenhouse provided by the present invention, the first film is covered on the greenhouse framework, and the first film has ventilation openings to form a preset ventilation area. The second film is connected to the first film, and the second film covers the ventilation openings. The driving member is used to drive the reel to rotate so that the heat preservation layer covers the first film or is wound on the reel;

[0010] The second film and the heat preservation layer are connected through a connection assembly so that the heat preservation layer drives the second film to open or cover the ventilation openings.

[0011] As an alternative, for the ventilation and heat preservation device of the greenhouse provided by the present invention, the first film and the second film are partially joined or partially overlapped;

[0012] The first film and the heat preservation assembly are connected through a connection assembly so that the heat preservation 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 a connection assembly so that the heat preservation assembly drives the second film to open or cover the preset ventilation area.

[0013] As an alternative, for the ventilation and heat preservation device of the greenhouse provided by the present invention, the connection assembly includes a tension belt, a connection belt, a rotating member and a reset member. The tension belt is located between the first film or the second film and the heat preservation layer. One end of the tension belt is connected to the reel, and the other end of the tension belt is connected to the top of the greenhouse.

[0014] The tension belt is coiled with the heat preservation layer; the connection belt is wound around the rotating member. The connection belt is located between the tension belt and the reset member, and the connection belt is respectively connected to the tension belt and the reset member; the first film or the second film is connected to the connection belt.

[0015] As an alternative, for the ventilation and heat preservation device of the greenhouse provided by the present invention, the reset member is located outside the greenhouse, the number of rotating members is at least one, and at least one rotating member is located outside the greenhouse.

[0016] As an alternative, for the ventilation and heat preservation device of the greenhouse provided by the present invention, the reset member is located inside the greenhouse, the number of rotating members is at least two, and the rotating members are respectively located on both sides of the overlapping position or the joined position of the first film and the second film.

[0017] As an alternative, for the ventilation and heat preservation device of the greenhouse provided by the present invention, the connection belt is a drawstring or a braided belt; the tension belt is a drawstring or a braided belt.

[0018] As an alternative, for the ventilation and heat preservation device of the greenhouse provided by the present invention, it further includes an emergency stop switch. The emergency stop switch is located at the top of the greenhouse, and the emergency stop switch is connected to the driving member to turn off the driving member when the reel approaches the emergency stop switch.

[0019] As an alternative, the ventilation and heat preservation device for the greenhouse provided by the present invention further includes a control system. The control system includes a controller and a position detector. Both the driving member and the position detector are connected to the controller. The position detector is located at the top, bottom or side of the greenhouse; or the position detector is located above the greenhouse, and the position detector is used to detect the position of the reel.

[0020] The controller is used to control, through the driving member, the heat preservation component to drive the first film to completely or partially cover the preset ventilation area according to the position of the reel; or control, through the driving member, the heat preservation component to drive the second film to completely or partially cover the preset ventilation area.

[0021] As an alternative, the ventilation and heat preservation device for the greenhouse provided by the present invention further includes a bracket or a rocker arm assembly. The bracket is arranged on the top of the greenhouse, and the position detector is located on the bracket or the rocker arm assembly.

[0022] The rocker arm assembly includes a first connecting arm, a second connecting arm and a cable. The position detector is connected to the cable. The first connecting arm and the second connecting arm are connected. The first connecting arm is connected to the bottom of the greenhouse, the second connecting arm is connected to the driving member, and the cable is connected to the driving member.

[0023] The present invention also provides a ventilation and heat preservation device for a greenhouse. The greenhouse includes a greenhouse skeleton and a first film covering the greenhouse skeleton. The first film has a ventilation opening. The device includes a second film, a connecting component and a heat preservation component.

[0024] The second film is connected to the first film and covers the ventilation opening.

[0025] The heat preservation component includes a reel, a heat preservation layer wound on the reel and a driving member connected to the reel. The driving member is used to drive the reel to rotate so that the heat preservation layer covers the first film or is wound on the reel.

[0026] The second film is connected to the heat preservation layer through the connecting component so that the heat preservation layer drives the second film to open or cover the ventilation opening.

[0027] As an alternative, for the ventilation and heat preservation device for the greenhouse provided by the present invention, the connecting component includes a connecting belt, a rotating member and a resetting member. The connecting belt is wound around the rotating member. The connecting belt is located between the heat preservation layer and the resetting member, and the connecting belt is respectively connected to the heat preservation layer and the resetting member; the second film is connected to the connecting belt.

[0028] As an alternative, for the ventilation and heat preservation device for the greenhouse provided by the present invention, the rotating member includes at least two rotating wheels. The two rotating wheels are respectively located on opposite sides of the ventilation opening. The connection position of the second film and the connecting belt is between the two rotating wheels on opposite sides of the ventilation opening.

[0029] A ventilation and heat preservation device for a greenhouse provided by the present invention, by setting a greenhouse framework, a connection component, a heat preservation component and a film component covering the greenhouse framework, the film component includes a first film and a second film, a preset ventilation area is provided on the greenhouse framework, the first film and the second film jointly cover the preset ventilation area, and the areas covered by the first film and the second film are different; the heat preservation component includes a reel, a heat preservation layer wound on the reel and a driving member connected to the reel, the driving member is used to drive the reel to rotate, and the film component and the heat preservation component are connected through the connection component, so that the heat preservation component drives the film component to expose or cover the preset ventilation area, and can simultaneously control the operation of opening the heat preservation layer and ventilating the interior of the greenhouse. It solves the problem that in the prior art, the rolling up and putting down of the heat preservation layer of the greenhouse and the opening and closing of the ventilation opening of the greenhouse are independently controlled, the operation is complex, and it is not conducive to accurately controlling the environment inside the greenhouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic diagram of the overall structure of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention;

[0032] Figure 2 It is a left view of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention;

[0033] Figure 3 For the present invention Figure 2 A partial enlarged view of part A;

[0034] Figure 4 It is a schematic diagram of the structure of the first alternative embodiment of the control system of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the second alternative embodiment of the control system of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the third alternative embodiment of the control system of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention;

[0037] Figure 7Schematic diagram of the fourth alternative embodiment of the control system of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention;

[0038] Figure 8 Schematic diagram of the overall structure of a ventilation and heat preservation device for a greenhouse provided in Embodiment 2 of the present invention;

[0039] Figure 9 Left view of a ventilation and heat preservation device for a greenhouse provided in Embodiment 2 of the present invention;

[0040] Figure 10 For the present invention Figure 9 Partial enlarged view at B in the present invention;

[0041] Figure 11 Schematic diagram of the overall structure of a ventilation and heat preservation device for a greenhouse provided in Embodiment 3 of the present invention.

[0042] Reference numerals:

[0043] 10 - greenhouse framework; 11 - support; 12 - installation groove; 20 - first film; 30 - ventilation opening; 40 - second film; 50 - connection assembly; 51 - connection belt; 52 - rotating member; 53 - reset member; 54 - tension belt; 60 - heat preservation assembly; 61 - reel; 62 - heat preservation layer; 63 - driving member; 64 - rocker arm assembly; 70 - emergency stop switch; 80 - control system; 81 - controller; 82 - position detector; 821 - first position detector; 822 - second position detector; 83 - temperature sensor; 831 - first temperature sensor; 832 - second temperature sensor; 84 - humidity sensor; 841 - first humidity sensor; 842 - second humidity sensor; 85 - soil sensor; 86 - light intensity sensor; 87 - rain and snow sensor. Detailed implementation manners

[0044] To make the objectives, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Embodiment 1

[0046] Figure 1 Schematic diagram of the overall structure of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention. Figure 2 Left view of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention. Figure 3 For the present inventionFigure 2 Partial enlarged view at A in the [Chinese context].

[0047] Referring to Figures 1 to 3 As shown, an air ventilation and heat preservation device for a greenhouse provided in an embodiment of the present invention. The greenhouse includes a greenhouse skeleton 10 and a first film 20 covering the greenhouse skeleton 10. There is a ventilation opening 30 on the first film 20. The air ventilation and heat preservation device includes a second film 40, a connection assembly 50, and a heat preservation assembly 60;

[0048] The second film 40 is connected to the first film 20 and the second film 40 covers the ventilation opening 30;

[0049] The heat preservation assembly 60 includes a reel 61, a heat preservation layer 62 wound around the reel 61, and a driving member ( Figures 1 to 3 not shown in the [Chinese context]) connected to the reel 61. The driving member is used to drive the reel 61 to rotate so that the heat preservation layer 62 covers the first film 20 or is wound on the reel 61;

[0050] The second film 40 and the heat preservation layer 62 are connected by the connection assembly 50 so that the heat preservation layer 62 drives the second film 40 to open or cover the ventilation opening 30.

[0051] Specifically, the ventilation opening 30 in this embodiment can be a ventilation opening opened on the first film 20. In this embodiment, by opening the ventilation opening 30, the greenhouse can be ventilated in a timely manner to ensure the stability of the internal environment of the greenhouse and improve the growth efficiency of the crops inside the greenhouse. Optionally, in this embodiment, the driving member can be two synchronously operating driving motors connected to both ends of the reel 61. By setting two synchronously operating driving motors to drive the rotation of the reel 61, the stability of the rotation of the reel 61 can be ensured. Of course, when the rotation of the reel 61 is stable, in order to save energy, optionally, the driving member in this embodiment can also be a single driving motor provided in the middle of the reel 61. Optionally, the driving member and the reel 61 in this embodiment can be connected by a coupling, a gearbox, or a transmission belt. Optionally, since the reel 61 moves along the greenhouse skeleton 10 during the process of winding the heat preservation layer 62 in this embodiment, the driving member in this embodiment can also be connected to the reel in a manner of moving synchronously with the reel. Specifically, the moving manner 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, which will not be elaborated in this embodiment. Optionally, for the heat preservation layer 62 in this embodiment, along the width direction of the greenhouse, one end of the heat preservation layer 62 is connected to the reel 61 to ensure that the heat preservation layer 62 can rotate together with the reel 61 when the reel 61 rotates, and the other end of the heat preservation layer 62 is connected to the top of the greenhouse to ensure the complete coverage of the greenhouse by the heat preservation layer 62.

[0052] Optionally, in this embodiment, the greenhouse framework 10 can adopt a fully steel-frame connected bow-shaped structure, or a three-sided earthen wall plus steel-frame fan-shaped structure, or a three-sided brick wall plus steel-frame fan-shaped structure, etc. It is selected according to the different latitudes and altitudes of each region, as well as the temperature in winter in this region. This embodiment does not make any limitations here. A plurality of support columns can also be provided below the greenhouse framework 10. The plurality of support columns can be vertically arranged. The tops of the plurality of support columns can be connected to the greenhouse framework 10, and the bottoms of the plurality of support columns can be connected to the ground surface. In this embodiment, by providing a plurality of support columns, the plurality of support columns can play a supporting role for the greenhouse framework 10 and improve the load-bearing capacity of the greenhouse framework 10.

[0053] Optionally, referring to Figure 1 As shown, in this embodiment, a plurality of ventilation openings 30 can be arranged along the length direction of the greenhouse. A second film 40 covers all of the plurality of ventilation openings 30. Arranging a plurality of ventilation openings can ensure the consistency and uniformity of ventilation along the length direction of the greenhouse. The ventilation openings 30 can be arranged at positions close to the top of the greenhouse. In this embodiment, arranging the ventilation openings 30 at positions located at the top of the greenhouse can ensure the uniformity of the temperature inside the greenhouse under the condition of ventilation in winter, and prevent the problem of too large temperature difference inside the greenhouse caused by the low temperature at the position close to the ventilation opening 30 and the high temperature at the position far from the ventilation opening 30 when the ventilation opening 30 is opened when it is arranged at a position close to the bottom.

[0054] Optionally, the first film 20 and the second film 40 are rectangular in shape and have four edges in total. The four edges of the first film 20 are connected to the greenhouse framework 10, or the four edges of the first film 20 are respectively connected to the greenhouse framework 10 or the ground, which improves the wind resistance of the first film 20. A rectangular ventilation opening 30 is opened at a position of the first film 20 close to the top of the greenhouse, which can timely ventilate and exchange air inside the greenhouse and ensure the uniformity of the temperature inside the greenhouse. The second film 40 covers the ventilation opening 30 and is connected to the first film 20 at a position of the edge of the ventilation opening 30 close to the bottom of the greenhouse, and is used to timely open or cover the ventilation opening 30 as needed to achieve the purpose of ventilating or insulating the greenhouse. Except for the edge where the second film 40 is connected to the first film 20 at the ventilation opening 30, the remaining edges are all connected to the greenhouse framework 10. The connection between the second film 40 and the greenhouse framework improves the wind resistance of the second film 40 while ensuring the airtightness of the greenhouse. Optionally, a film pressing rope (not shown in the figure) is arranged along the width direction of the greenhouse. One end of the film pressing rope is connected to the top of the greenhouse, and the other end is connected to 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 tightened and unfolded state, improves the light transmittance, and increases the wind resistance. Optionally, a plurality of film pressing ropes can be arranged along the length direction of the greenhouse, and one film pressing rope can be arranged every about 1 meter.

[0055] Optionally, in this embodiment, the heat preservation layer 62 can be a multi-layer structure. For example, the heat preservation layer 62 can include a heat preservation cotton quilt and a plastic film that are stacked on top of each other. The heat preservation cotton quilt and the plastic film can be jointly wound on the reel 61. The second film 40 can be opened or covered the ventilation opening 30 driven by the heat preservation cotton quilt, or the second film 40 can also be opened or covered the ventilation opening 30 driven by the plastic film. Optionally, in this embodiment, a layer of transparent plastic or a strip of canvas can also be attached at the connection between the heat preservation layer 62 and the connection assembly 50. The connection assembly 50 drives the second film 40 to open or cover the ventilation opening 30 by driving the transparent plastic or the strip of canvas.

[0056] Specifically, referring to Figure 1 As shown, when the driving member 63 drives the reel 61 to rotate from the top of the greenhouse to the bottom of the greenhouse, the heat preservation layer 62 moves from being wound on the reel 61 to completely covering the first film 20 and the second film 40, achieving the purpose of keeping the inside of the greenhouse warm at night. When the driving member 63 drives the reel 61 to rotate from the bottom of the greenhouse to the top of the greenhouse, the heat preservation layer 62 gradually winds on the reel 61 from covering the first film 20 and the second film 40, achieving the purpose of lighting and heat preservation.

[0057] A ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention. The greenhouse includes a greenhouse skeleton and a first film covering the greenhouse skeleton. The first film has a ventilation opening. The device includes a second film, a connection assembly, and a heat preservation assembly; the second film is connected to the first film, and the second film covers the ventilation opening; the heat preservation assembly includes a reel, a heat preservation layer wound on the reel, and a driving member connected to the reel. The driving member is used to drive the reel to rotate so that the heat preservation layer covers the first film or winds on the reel; the second film is connected to the heat preservation layer through the connection assembly so that the heat preservation layer drives the second film to open or cover the ventilation opening. In this way, the second film is connected to the heat preservation layer through the connection assembly, and when the heat preservation layer rotates driven by the driving member, the second film can be opened or covered the ventilation opening, ensuring that by operating to open the heat preservation layer, the operation of opening the ventilation opening is realized to ventilate the inside of the greenhouse, and by operating to cover the heat preservation layer, the operation of covering the ventilation opening is realized to keep the inside of the greenhouse warm. It avoids complex operations, improves the accuracy of controlling the environment inside the greenhouse, and is beneficial to the growth of crops inside the greenhouse.

[0058] Optionally, referring to Figures 1 to 3 As shown, a ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention. The connection assembly 50 includes a connection belt 51, a rotating member 52, and a reset member 53. The connection belt 51 is wound around the rotating member 52. The connection belt 51 is located between the heat preservation layer 62 and the reset member 53, and the connection belt 51 is respectively connected to the heat preservation layer 62 and the reset member 53. The second film 40 is connected to the connection belt 51.

[0059] Optionally, referring to Figures 1 to 3 As shown, in this embodiment, the first end of the connecting belt 51 is connected to the heat preservation layer 62, the second film 40 is connected to the connecting belt 51, and the second end of the connecting belt 51 is connected to the reset member 53. The connection point between the connecting belt 51 and the second film 40 is located between the connection point between the connecting belt 51 and the heat preservation layer 62 and the connection point between the connecting belt 51 and the reset member.

[0060] Specifically, in this embodiment, the rotating member 52 can be a tension roller, and the connecting belt 51 is wound around the tension roller. Optionally, in this embodiment, the reset member 53 can be a lead weight or an iron block, etc. In this embodiment, the connecting belt 51 can be tensioned by the reset member 53 and the tension roller, avoiding the situation that the second film 40 has wrinkles and cannot completely cover the ventilation opening 30. The linkage between the second film 40 and the heat preservation layer 62 is improved. The stability of the environment in the greenhouse is effectively guaranteed, which is beneficial to the growth of crops in the greenhouse.

[0061] Optionally, in this embodiment, the reset member 53 can be the counterweight shown in the figure, and the counterweight 53 tensions the connecting belt 51 by its own gravity. Specifically, through its own gravity, the reset member 53 ensures that the connecting belt 51 is in a tensioned state. When the reel 61 moves towards the top of the greenhouse, the heat preservation layer 62 drives the connecting belt 51, and the connecting belt 51 drives the second film 40 and the reset assembly 53 to move, achieving the purpose of opening the ventilation opening 30 by the second film 40; when the reel 61 moves from the top to the bottom of the greenhouse, the end of the heat preservation layer 62 connected to the connecting belt 51 moves downward, the reset member 53 drives the other end of the connecting belt 51 connected to the reset member 53 to move downward, and the connecting belt 51 drives the second film 40 to move, achieving the purpose of covering the ventilation opening 30.

[0062] Optionally, in this embodiment, the reset member 53 can also be an elastic reset member with one end connected to the greenhouse framework 10 or the ground or the film pressing rope and the other end connected to the connecting belt 51. Optionally, the elastic reset member can be a tension spring or an elastic member such as a rubber band, etc. The elastic reset member tensions the connecting belt 51 through its own elastic restoring force. In order to ensure the normal operation of the elastic reset member, it is required that the elastic reset member is in a stretched state, and its working principle and function are the same as those for tensioning the connecting belt 51 under the action of gravity, which will not be elaborated here.

[0063] Optionally, chicken buckle holes can be added at the position where the heat preservation layer 62 needs to be connected to the connecting belt 51, and the connecting belt 51 is passed through the chicken buckle holes from the lower side of the heat preservation layer 62 and then knotted to achieve a firm connection between the heat preservation layer 62 and the connecting belt 51.

[0064] Optionally, when connecting the connecting belt 51 to the second film 40, a greenhouse boat-shaped air vent can be used. In this case, the connecting belt 51 can be divided into two sections. One end of the first section is connected to the reset member 53, and the other end is connected to the greenhouse boat-shaped air vent. One end of the second section is connected to the heat preservation layer 62, and the other end is connected to the greenhouse boat-shaped air vent. The use of the greenhouse boat-shaped air vent simplifies the installation process, and also avoids the situation where the second film 40 is double-folded at the ventilation opening after moving along the connecting belt 52 at the edge.

[0065] Optionally, when the reel 61 rolls the heat preservation layer 62 to the top position of the greenhouse, the reel 61 is mostly bent. To ensure that the heat preservation layer drives the second film 40 to evenly open the ventilation opening, when the reel 61 is at the top position of the greenhouse, according to the size of the ventilation opening 30 required at this position, select the connection position of the heat preservation layer 62 and the connecting belt 51 to ensure the consistency of the opening of the ventilation opening 30 when the reel 61 is at the top position of the greenhouse, which can avoid the unevenness of opening or covering the ventilation opening 30 caused by the bending of the reel 61.

[0066] Optionally, multiple ventilation and heat preservation devices of the greenhouse provided by the embodiments of the present invention can be arranged in the length direction of the greenhouse. Specifically, a connection component 50 can be arranged at intervals of about 1.5 meters to ensure that the heat preservation layer 62 drives the second film 40 to evenly open the ventilation opening 30 along the length direction of the greenhouse for ventilation of the greenhouse.

[0067] Further, referring to Figures 1 to 3 As shown, for a ventilation and heat preservation device of a greenhouse provided by an embodiment of the present invention, the rotating member 52 includes at least two rotating wheels, and the two rotating wheels are respectively located on opposite sides of the ventilation opening 30. The connection part of the second film 40 and the connecting belt 51 is between the two rotating wheels 52 on opposite sides of the ventilation opening 30.

[0068] Since the reel 61 of the greenhouse usually 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, therefore, to adapt to the rolling of the heat preservation layer 62 by the reel 61 of the greenhouse, optionally, in this embodiment, referring to Figures 1 to 3 As shown, the two fixed pulleys can be arranged on opposite sides of the ventilation opening 30 along the greenhouse frame 10, that is, on both sides in the width direction of the greenhouse at the ventilation opening.

[0069] Optionally, in this embodiment, the two rotating members can be fixed pulleys. The fixed pulleys can be fixed on the greenhouse frame 10 or can be detachably arranged on the greenhouse frame 10. The cooperation between the fixed pulleys and the reset member 53 ensures that the connecting belt 51 is in a tensioned state, ensuring that the second film 40 can open or cover the ventilation opening 30. Optionally, the fixed pulleys on the inner side of the greenhouse can be directly fixed on the greenhouse frame 10; for the fixed pulleys on the outer side of the greenhouse, since the first film 20 covers the greenhouse frame 10, the fixed pulleys can be fixed on the greenhouse frame 10 by penetrating the first film 20. Optionally, a special bracket can also be made to extend outside through the ventilation opening 30 for fixing the fixed pulleys on the outer side. Considering that when the thermal insulation layer 62 completely covers the greenhouse, it will also cover the fixed pulleys on the outer side and the special bracket for fixing the rotating wheels on the outer side, it is required that the rotating wheels on the outer side and the special bracket for fixing the rotating wheels on the outer side be as thin as possible. Optionally, a steel pipe is installed on the outer side of the greenhouse. The length of the steel pipe is the same as the length of the greenhouse. The two ends of the steel pipe are fixed on the greenhouse frame, and the fixed pulleys on the outer side of the greenhouse are connected to the steel pipe. The use of the steel pipe ensures the convenience of installing multiple fixed pulleys on the outer side 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 the length of the greenhouse. The steel pipe is fixed on the greenhouse frame, and the fixed pulleys on the inner side of the greenhouse are connected to the steel pipe. The use of the steel pipe ensures the convenience of installing multiple rotating members on the inner side of the greenhouse.

[0070] Optionally, referring to Figure 3 As shown, in this embodiment, the fixed pulley near the top of the greenhouse is arranged on the outer side of the greenhouse, and the fixed pulley near the bottom of the greenhouse is arranged on the inner side of the greenhouse. The connecting belt 51 can pass under one fixed pulley on the side of the ventilation opening 30 near the top of the greenhouse starting from the position connected to the thermal insulation layer 62, then is wound around another fixed pulley on the side of the ventilation opening 30 near the bottom of the greenhouse, and finally is connected to the reset member 53. In this way, the connecting belt 51 can be effectively tensioned by the two fixed pulleys, ensuring that the connecting belt 51 can effectively drive the second film 40 to open or cover the ventilation opening 30. It should be noted that in this embodiment, since two fixed pulleys are provided and the connecting belt 51 is wound around the two fixed pulleys in sequence; therefore, the connection point between the first end of the connecting belt 51 and the thermal insulation layer 62 is located on the side of the ventilation opening 30 near the top of the greenhouse. In this way, when the reel 61 drives the thermal insulation layer 62 to cover the first film 20, since the connection point between the first end of the connecting belt 51 and the thermal insulation layer 62 is located on the side of the ventilation opening 30 near the top of the greenhouse, the connecting belt 51 will not continue to move downward under the drive of the thermal insulation layer 62, thus avoiding the situation where the movement of the connecting belt 51 opens the ventilation opening 30 again.

[0071] Optionally, in this embodiment, the distance between the connection point where the first end of the connecting belt 51 is connected to the heat preservation layer 62 and the top of the greenhouse is less than or equal to the distance between the connection point where the first end of the connecting belt 51 is connected to the heat preservation layer 62 and the connection point between the second film 40 and the connecting belt 51. In this embodiment, setting the distance between the connection point and the top of the greenhouse to be less than or equal to the distance between the connection point and the connection point between the second film 40 and the connecting belt 51 can ensure that when the reel 61 is wound to the top of the greenhouse, the ventilation opening can be effectively opened without damaging the second film 40, effectively extending the service life of the second film 40. Optionally, in this embodiment, the distance between the connection point where the first end of the connecting belt 51 is connected to the heat preservation layer 62 and the top of the greenhouse is greater than or equal to the distance between the top of the second film 40 and the connection point between the second film 40 and the connecting belt 51. In this embodiment, setting the distance between the connection point where the first end of the connecting belt 51 is connected to the heat preservation layer 62 and the top of the greenhouse to be greater than or equal to the distance between the top of the second film 40 and the connection point between the second film 40 and the connecting belt 51 can effectively ensure that the ventilation opening 30 can be fully opened, improving the ventilation efficiency inside the greenhouse.

[0072] Optionally, referring to Figures 1 to 3 As shown, in the ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention, the number of rotating wheels is three. The rotating wheels are connected to the greenhouse frame 10. The rotating wheels located on the opposite sides of the ventilation opening 30 face the outside of the greenhouse, and the third rotating wheel faces the inside of the greenhouse. The reset member 53 is located inside the greenhouse.

[0073] In this embodiment, by setting three rotating wheels, the tensioning effect of the rotating wheels on the connecting belt is improved, and the smoothness and stability of the movement of the connecting belt are also improved.

[0074] Optionally, in the ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention, the connecting belt 51 is a drawstring or a braided belt.

[0075] Specifically, in this embodiment, the drawstring can be a steel wire stretch or a braided rope with good tensile strength.

[0076] In this embodiment, setting the connecting belt as a steel wire stretch or a braided belt ensures the flexibility of the connecting belt on the one hand and the tensile strength and abrasion resistance of the connecting belt on the other hand, effectively ensuring the service life of the connecting belt.

[0077] Figure 4 It is a schematic structural diagram of the first optional embodiment of the control system of the ventilation and heat preservation device for a greenhouse provided by Embodiment 1 of the present invention. Figure 5 It is a schematic structural diagram of the second optional embodiment of the control system of the ventilation and heat preservation device for a greenhouse provided by Embodiment 1 of the present invention. Figure 6Schematic diagram of the third alternative embodiment of the control system of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention. Figure 7 Schematic diagram of the fourth alternative embodiment of the control system of a ventilation and heat preservation device for a greenhouse provided in Embodiment 1 of the present invention.

[0078] Optionally, referring to Figures 1 to 7 As shown, a ventilation and heat preservation device for a greenhouse provided in an embodiment of the present invention further includes an emergency stop switch 70. 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.

[0079] Specifically, referring to Figure 1 As shown, in this embodiment, two emergency stop switches 70 may be provided, and the two emergency stop switches 70 are arranged side by side along the length direction of the greenhouse. Optionally, the emergency stop switch 70 in this embodiment may be a contact switch. When the heat preservation component 60 contacts the contact piece of the contact switch, the contact switch disconnects the power supply to the driving member, thereby stopping the movement of the reel 61. Optionally, in this embodiment, the emergency stop switch 70 may also be an NKL inductive proximity switch produced by CHINT Electric Appliance. The NKL inductive proximity switch is a position switch that can operate without mechanical contact with moving parts. When an object approaches the sensing surface of the proximity switch to the sensing distance, the switch can act without mechanical contact and applying pressure.

[0080] In this embodiment, by providing an emergency stop switch, when the heat preservation component 60 approaches the emergency stop switch, the power supply to the driving member can be disconnected, thereby avoiding the problem of the reel rolling over and falling.

[0081] Optionally, referring to Figures 1 to 7 As shown, a ventilation and heat preservation device for a greenhouse provided in an embodiment of the present invention further includes a control system 80. The control system 80 includes a controller 81 and a position detector 82. Both the driving member 63 and the position detector 82 are 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 to detect the position of the reel 61;

[0082] The controller 81 is used to control the heat preservation layer 62 to drive the second film 40 to completely or partially cover the ventilation opening 30 through the driving member 63 according to the position of the reel 61.

[0083] Specifically, referring to Figure 1As shown, in this embodiment, the position detector 82 may include a first position detector 821 and a second position detector 822. 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. Optionally, the first position detector 821 may also be located at other positions on the top of the greenhouse.

[0084] Specifically, referring to Figure 1 As shown, in this embodiment, there are two first position detectors 821 and two second position detectors 822. Through the two first position detectors 821 and the two second position detectors 822, the position of the reel 61 on the greenhouse frame 10 can be accurately known, and the rolling of the heat preservation layer 62 by the reel 61 can be accurately controlled, so as to effectively control the second film 40 to completely or partially cover the ventilation opening 30, effectively control the ventilation volume of the ventilation opening 30, accurately control the environment inside the greenhouse, and be beneficial to the growth of crops in the greenhouse. Optionally, in this embodiment, the position sensor 82 may be an ultrasonic sensor of model MA58MF14-7N produced by Murata of Japan. The position of the heat preservation component can be accurately determined by the echo of the ultrasonic wave reflected by the heat preservation component 60. Optionally, in this embodiment, the second film 40 partially covering the ventilation opening 30 may be covering one-fourth, one-third or one-half of the ventilation opening 30. The specific size of the second film 40 covering the ventilation opening 30 can be realized by detecting the position of the rotating shaft 61 by the position sensor 82 and controlling the position of the rotating shaft 61 by the driving member 63.

[0085] Furthermore, referring to Figures 1 to 7 As shown, a ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention further includes a bracket 11. The bracket 11 is arranged at the top of the greenhouse, and the position detector 82 is located on the bracket 11.

[0086] Specifically, referring to Figure 1 As shown, in this embodiment, it may be that the first position detector 821 is located on the bracket 11.

[0087] Optionally, referring to Figure 1 and Figure 2 As shown, in this embodiment, the ventilation and heat preservation device of the greenhouse further includes a mounting groove 12. The mounting groove 12 is arranged at the bottom of the greenhouse and is located outside the greenhouse, and the second position detector 822 is located in the mounting groove 12.

[0088] It should be noted here that by installing the first position detector 821, the accurate position of the heat preservation component 60 when it is close to the top of the greenhouse can be accurately detected, so as to control the position of the heat preservation component 60 to achieve the purpose of ventilating or heat preserving the greenhouse by opening or covering the ventilation opening 30; by installing the second position detector 822, the accurate position of the heat preservation component 60 when it is close to the bottom of the greenhouse can be accurately detected, so as to achieve the full coverage of the heat preservation layer 62 on the greenhouse and achieve the purpose of heat preservation. According to the different greenhouse frameworks 10, when the heat preservation component is in the middle position along the width of the greenhouse, it may be exactly in the detection blind area of 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 preservation component 60. However, by selecting the position of the ventilation opening 30, the area where the ventilation opening 30 is located can be avoided from this blind area position to ensure that the system function is not affected by the existence of the blind area.

[0089] Further, referring to Figures 5 to 7 As shown, a ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention further includes a temperature sensor 83. The temperature sensor 83 is used to detect the temperature inside and outside the greenhouse, and the temperature sensor 83 is connected to the controller 81; the controller 81 is used to control the driving member to drive the reel 61 to rotate according to the temperature inside and outside the greenhouse.

[0090] Specifically, referring to Figure 5 As shown, in this 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 arranged inside the greenhouse, and the second temperature sensor 832 may be arranged 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. The controller can control the driving member to drive the reel 61 to rotate according to the temperature inside and outside the greenhouse, so as to accurately control the environment inside the greenhouse and be beneficial to the growth of crops inside the greenhouse. Optionally, multiple first temperature sensors 831 may be arranged. Optionally, the second temperature sensor 832 may not be arranged. Optionally, the temperature sensor adopted in this embodiment may be a temperature sensor with the model TMP275AIDGKT produced by Texas Instruments.

[0091] Optionally, referring to Figures 5 to 7 As shown, a ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention further includes a humidity sensor 84. The humidity sensor 84 is used to detect the humidity inside and outside the greenhouse, and the humidity sensor 84 is connected to the controller 81; the controller 81 is used to control the driving member to drive the reel 61 to rotate according to the humidity inside and outside the greenhouse.

[0092] Specifically, referring to Figure 6As shown, 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, by providing the first humidity sensor 841 and the second humidity sensor 842, the humidity inside and outside the greenhouse can be respectively obtained, and the controller can control the driving member to rotate the driving reel 61 according to the humidity inside and outside the greenhouse, so as to accurately control the environment inside the greenhouse and facilitate the growth of the crops inside the greenhouse. Optionally, a plurality of first humidity sensors 841 may be provided. Optionally, the second humidity sensor 842 may not be provided. Optionally, in this embodiment, the humidity sensor may be a humidity sensor of model HDC1080 produced by Texas Instruments.

[0093] Based on the foregoing example, optionally, referring to Figure 7 As shown, in other examples of the present invention, the control system 80 may further include a soil sensor 85. The soil sensor 85 is disposed inside the greenhouse and is used to analyze the soil inside the greenhouse. The soil sensor 85 is connected to the controller 81. The main analysis items may include soil water content, soil temperature, total salt in the soil, etc. Optionally, the soil sensor 85 in this embodiment may be a soil sensor of model JXBS-6001-TR produced by Jingxun Changtong Technology Co., Ltd. Optionally, in other examples of the present invention, the control system 80 may further include a light intensity sensor 86. The light intensity sensor 86 is disposed outside the greenhouse and is used to detect the light intensity. The light intensity sensor 86 is connected to the controller 81. The controller 81 controls the driving member to rotate the driving reel 61 according to the light intensity detected by the light intensity sensor 86. Optionally, in this embodiment, the light intensity sensor 86 may be a light intensity sensor of model OPT3002DNPT produced 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 to detect the weather of the external environment of the greenhouse. The rain and snow sensor 87 is connected to the controller 81. The controller 81 controls the driving member to rotate the driving reel 61 according to the environmental weather detected by the rain and snow sensor 87. Optionally, in this embodiment, the rain and snow sensor 87 may be a rain and snow sensor of model JXBS-3001 produced by Jingxun Changtong Technology Co., Ltd.

[0094] Optionally, referring to Figures 4 to 7As shown, another example of the present invention provides a ventilation and heat preservation device for a greenhouse. 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 signal-connected to the background server, and the background server is signal-connected to the signal transmission device. The background server is used to receive the signal transmitted by the mobile terminal and send a control signal to the signal transmission device, and is also used to receive the signal transmitted by the signal transmission device and transmit the signal to the mobile terminal.

[0095] Embodiment 2

[0096] Figure 8 It is a schematic diagram of the overall structure of a ventilation and heat preservation device for a greenhouse provided by Embodiment 2 of the present invention; Figure 9 It is a left view of a ventilation and heat preservation device for a greenhouse provided by Embodiment 2 of the present invention; Figure 10 For the present invention Figure 9 The partial enlarged view at B in. Refer to Figures 8 to 10 As shown, the ventilation and heat preservation device for a greenhouse provided by the embodiment of the present invention includes a greenhouse framework 10, a connection assembly 50, a heat preservation assembly 60, and a film assembly covering the greenhouse framework. The film assembly includes a first film 20 and a second film 40. The greenhouse framework 10 has a preset ventilation area, and the first film 20 and the second film 40 jointly cover the preset ventilation area, and the areas covered by the first film 20 and the second film 40 are different;

[0097] The heat preservation assembly 60 includes a reel 61, a heat preservation layer 62 wound on the reel 61, and a driving member 63 connected to the reel. The driving member 63 is used to drive the reel 61 to rotate so that the heat preservation layer 62 covers the film assembly and / or is wound on the reel 61; the film assembly is connected to the heat preservation assembly 60 through the connection assembly 50 so that the heat preservation assembly 60 drives the film assembly to expose or cover the preset ventilation area.

[0098] Furthermore, for the ventilation and heat preservation device for a greenhouse provided by the embodiment of the present invention, the first film 20 and the second film 40 are partially joined or partially overlapped;

[0099] The first film 20 is connected to the heat preservation assembly 60 through the connection assembly 50 so that the heat preservation assembly 60 drives the first film 20 to open or cover the preset ventilation area; or the second film 40 is connected to the heat preservation assembly 60 through the connection assembly 50 so that the heat preservation assembly 60 drives the second film 40 to open or cover the preset ventilation area.

[0100] Among them, the structure of the greenhouse framework 10 and the structure of the heat preservation layer 62 may be the same as the structure of the greenhouse framework 10 and the structure of the heat preservation layer 62 in Embodiment 1 above, and will not be elaborated here one by one in this embodiment.

[0101] Specifically, in this embodiment, the first film 20 and the second film 40 jointly cover the greenhouse framework 10. The first film 20 or the second film 40 is connected to the heat preservation component 60 through the connection component 50. The connection component 50 drives the first film 20 or the second film 40 to expose the greenhouse framework 10, so that the first film 20 or the second film 40 is in a state of not covering the greenhouse framework 10. At this time, the area of the greenhouse framework 10 that is not covered is the preset ventilation area of the greenhouse framework 10. This preset ventilation area can ventilate and exchange air inside the greenhouse to ensure the stability of the internal environment of the greenhouse and improve the growth efficiency of the crops inside the greenhouse. Optionally, the preset ventilation area can be set at a position close to the top of the greenhouse. In this embodiment, setting the preset ventilation area at a position close to the top of the greenhouse can ensure the uniformity of the temperature inside the greenhouse during ventilation in winter, and prevent the problem of excessive temperature difference caused by the low temperature at the position close to the preset ventilation area and the high temperature at the position far from the preset ventilation area when the preset ventilation area is opened when it is set at a position close to the bottom.

[0102] Optionally, in this embodiment, the driving member 63 can be two driving motors that are connected to both ends of the reel 61 and operate synchronously. By setting two driving motors that operate synchronously to drive the rotation of the reel 61, the stability of the rotation of the reel 61 can be ensured. Of course, on the premise of ensuring the stable rotation of the reel 61, in order to save energy, the driving member 63 in this embodiment can also be a single driving motor provided in the middle of the reel 61. Optionally, the driving member 63 and the reel 61 in this embodiment can be connected through a coupling, a gearbox or a transmission belt. Optionally, since the reel 61 moves along the greenhouse framework 10 during the process of winding the heat preservation layer 62 in this embodiment, the driving member 63 in this embodiment can also be connected to the reel in a manner of moving synchronously with the reel. Specifically, the moving mode 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, which will not be elaborated in this embodiment.

[0103] Optionally, referring to Figure 8 As shown, in this embodiment, the first film 20 is located in the upper half of the greenhouse framework 10, and the second film 40 is located in the lower half of the greenhouse framework 10; or the first film 20 is located in the lower half of the greenhouse framework 10, and the second film 40 is located in the upper half of the greenhouse framework 10, as long as the first film 20 and the second film 40 jointly cover the greenhouse framework 10. The first film 20 and the second film 40 jointly cover the greenhouse framework 10 to achieve the purpose of daylighting and heat preservation of the greenhouse, which is beneficial to the growth of crops. Optionally, at the position where the first film 20 and the second film 40 are partially connected or partially overlapped, the film close to the top of the greenhouse covers the film close to the bottom of the greenhouse, ensuring that when the rainwater flows along the film from the top of the greenhouse to the bottom of the greenhouse, it will not enter the inside of the greenhouse.

[0104] Optionally, the first film 20 and the second film 40 are rectangular in shape and have four edges. Except for the edges where the first film 20 and the second film 40 are joined or partially overlapped, the remaining edges are all connected to the greenhouse frame 10, or are respectively connected to the greenhouse frame and the ground. The connection to the greenhouse frame and / or the ground improves the wind resistance of the first film 20 and the second film 40 while ensuring the airtightness of the greenhouse. Optionally, there are film pressing ropes arranged along the width direction of the greenhouse. One end of the film pressing rope is connected to the top of the greenhouse, and the other end is connected to the bottom of the greenhouse. The presence of the film pressing ropes ensures that the first film 20 and the second film 40 are in a taut and unfolded state, improving the light transmittance and increasing the wind resistance, which is beneficial to crop growth and the lifespan of the greenhouse. Optionally, multiple film pressing ropes can be arranged along the length direction of the greenhouse, and one film pressing rope can be arranged every about 1 meter.

[0105] Specifically, referring to Figure 8 As shown, during the process of the driving member 63 driving the winding shaft 61 to rotate from the top of the greenhouse to the bottom of the greenhouse, the heat preservation layer 62 gradually moves from being wound on the winding shaft 61 to covering a part of the first film 20, covering the entire first film 20, covering a part of the second film 40, until covering the entire second film 40; or during the rotation of the winding shaft 61, the heat preservation layer 62 gradually moves from being wound on the winding shaft 61 to covering a part of the second film 40, covering the entire second film 40, covering a part of the first film 20, until covering the entire first film 20. The heat preservation layer 62 completely covers the first film 20 and the second film 40, achieving the purpose of keeping the inside of the greenhouse warm at night. During the process of the driving member 63 driving the winding shaft 61 to rotate from the bottom of the greenhouse to the top of the greenhouse, the heat preservation layer 62 gradually winds on the winding shaft 61 from covering the first film 20 and the second film 40, achieving the purpose of daylighting and heat preservation.

[0106] In another achievable way, the greenhouse frame 10 adopts a full-steel-frame connected bow structure. The first film 20 and the second film 40 jointly cover the greenhouse frame. The greenhouse includes two left and right semi-circular sides and an arc-shaped surface on the upper side. The heat preservation layer 62 is located on the arc-shaped surface. During the process of the reel 61 rotating from the top of the greenhouse to the bottom of the greenhouse, the heat preservation layer 62 can only cover the parts of the first film 20 and the second film 40 located on the arc-shaped surface. Optionally, a plurality of heat preservation components 60 can be arranged in the length direction of the greenhouse. The plurality of heat preservation components 60 arranged along the length direction of the greenhouse are applicable to the situation where the greenhouse is relatively long. Due to the excessive length of the reel 61, in the case of only setting one heat preservation component 60, the power of the conventional driving part 63 cannot meet the use requirements; optionally, two heat preservation components 60 can be arranged in the width direction of the greenhouse. Optionally, these two heat preservation components 60 can share one heat preservation layer 62. The situation of arranging two heat preservation components 60 in the width direction of the greenhouse is applicable to the greenhouse adopting a full-steel-frame connected bow structure. In the greenhouse with a full-steel-frame connected bow structure, one heat preservation component is installed on each of the front and rear sides of the arc-shaped surface (as described above, facing the greenhouse, the left and right sides are semi-circular surfaces, and the upper side is an arc-shaped surface). Sharing the heat preservation layer 62 can reduce the installation difficulty and installation cost.

[0107] During specific implementation, a plurality of ventilation and heat preservation devices of the greenhouse provided by the embodiments of the present invention can be arranged in the length direction of the greenhouse. Specifically, a connecting component 50 can be set every about 1.5 meters to ensure that the heat preservation component 60 can uniformly drive the film component along the length direction of the greenhouse to open a preset ventilation area so as to ventilate the greenhouse.

[0108] For the ventilation and heat preservation device of the greenhouse provided by the embodiments of the present invention, the greenhouse frame is covered by the first film and the second film. The first film or the second film is connected to the heat preservation component through the connecting component. The connecting component drives the first film or the second film to expose the greenhouse frame, so that the first film or the second film is in a state of not covering the greenhouse frame. At this time, the area of the greenhouse frame that is not covered is the preset ventilation area of the greenhouse frame. In this way, by operating to open (cover) the heat preservation layer, the preset ventilation area of the exposed greenhouse frame is realized to ventilate the inside of the greenhouse, and by operating to cover (open) the heat preservation layer, the preset ventilation area of the greenhouse is covered to keep warm the inside of the greenhouse. Complicated operations are avoided, the accuracy of controlling the environment inside the greenhouse is improved, and it is beneficial to the growth of crops inside the greenhouse.

[0109] Optionally, refer to Figures 8 to 10As shown in the figure, a ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention, the connection assembly 50 includes a tension belt 54, a connection belt 51, a rotating member 52 and a reset member 53. The tension belt 54 is located between the first film 20 or the second film 40 and the heat preservation layer 62. One end of the tension belt 54 is connected to the reel 61, and the other end of the tension belt 54 is connected to the top of the greenhouse. The tension belt 54 is wound together with the heat preservation layer 62; the connection belt 51 is wound around the rotating member 52. The connection belt 51 is located between the tension belt 54 and the reset member 53, and the connection belt 51 is respectively connected to the tension belt 54 and the reset member 53; the first film 20 or the second film 40 is connected to the connection belt 52.

[0110] Specifically, in this embodiment, the rotating member 52 can be a fixed pulley. The connection belt 51 is wound around the fixed pulley. The fixed pulley is used to define the movement track of the connection belt 51 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 connection belt 51 to open or cover a preset ventilation area for ventilation or heat preservation operation of the greenhouse, and ensure that the connection belt 51 can be connected to the reset member 53 at a predetermined position by defining the movement track of the connection belt 51 to ensure the normal opening and closing of the preset ventilation area.

[0111] Optionally, in this embodiment, the reset member 53 can be a lead weight or an iron block, etc. In this embodiment, the reset member 53 and the rotating member 52 can tension the connection belt 51, avoiding 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, improving the linkage between the first film 20 or the second film 40 and the heat preservation assembly 60, effectively ensuring the stability of the environment in the greenhouse, and being beneficial to the growth of crops in the greenhouse. Specifically, the reset member 53 ensures that the connection belt 51 is in a tensioned state through its own gravity. When the reel 61 moves towards the top of the greenhouse, the heat preservation assembly 60 drives the tension belt 54, the tension belt 54 drives the connection belt 51, and the connection belt 51 drives the film assembly and the reset assembly 53 to move, achieving the purpose of opening (closing) the preset ventilation area by the film assembly; when the reel 61 moves from the top of the greenhouse to the bottom, the heat preservation assembly 60 drives the tension belt 54 to move downward, the tension belt 54 drives one end of the connection belt 51 connected to the tension belt 54 to move downward, the reset member 53 drives the other end of the connection belt 51 connected to the reset member 53 to move downward, and the connection belt 51 drives the film assembly to move, achieving the closing (opening) of the preset ventilation area.

[0112] Optionally, in this embodiment, the reset member 53 can also be an elastic reset member with one end connected to the greenhouse framework 10, the ground, or the film pressing rope, and the other end connected to the connecting belt 51. Optionally, the elastic reset member can be a tension spring or an elastic member such as a rubber band. To ensure the normal operation of the elastic reset member, it is required that the elastic reset member is in a stretched state, and its working principle is the same as that of achieving tension on the connecting belt 51 under the action of gravity, which will not be elaborated here.

[0113] Optionally, the connecting belt 51 is a drawstring or a woven belt, and the tension belt 54 can be a drawstring or a woven belt. The drawstring can be a steel wire rope, a plastic rope, a nylon rope, etc. In this embodiment, the tension belt 54 is set as a steel wire rope with a diameter of 2.0 mm. Without affecting the rolling of the thermal insulation layer 62 due to the excessive thickness of the tension belt 54 and while ensuring that the force meets the requirements, the service life of the tension belt 54 is improved. The connecting belt 51 is set as a nylon rope, which on the one hand ensures the flexibility of the connecting belt 51, and on the other hand ensures the tensile strength and abrasion resistance of the connecting belt 51, effectively ensuring the service life of the connecting belt 51.

[0114] Optionally, the tension belt 54 can be not provided, and the thermal insulation layer 62 replaces the function of the tension belt 54. This embodiment does not make any limitations here. The thermal insulation layer 62 directly connects to the connecting belt 51 instead of the tension belt 54, saving resources.

[0115] Optionally, when the reel 51 is located at the bottom of the greenhouse, the tension belt 54 is laid along the width direction of the greenhouse between the thermal insulation layer 62 and the film assembly. The connection point position of the connecting belt 51 and the tension belt 54 is located on the tension belt 54, between the position where the first film 20 and the second film 40 partially meet or partially overlap and the position of the greenhouse top. Therefore, when the reel 51 moves from the greenhouse top to the greenhouse bottom, when the reel moves to the connection point position of the connecting belt 51 and the tension belt 54, the connecting belt 51 will not continue to move downward under the drive of the thermal insulation assembly 60, thus avoiding the situation where the excessive movement of the connecting belt 51 damages the connection assembly 50.

[0116] Optionally, when the tension belt is selected as a steel wire rope, a steel wire snap can be used to clamp onto the steel wire rope, and then a nut sling is fixed on the snap screw, and then the connecting belt 51 is connected to the nut sling to complete the connection between the connecting belt 51 and the tension belt 54.

[0117] Optionally, when connecting the connecting belt 51 to the first film 20 or the second film 40, a greenhouse ship-shaped air vent can be used. At this time, the connecting belt 51 is divided into two sections. One end of the first section is connected to the reset member 53, and the other end is connected to the greenhouse ship-shaped air vent; one end of the second section is connected to the tension belt 54, and the other end is connected to the greenhouse ship-shaped air vent. The use of the greenhouse ship-shaped air vent simplifies the installation process, and the use of the greenhouse ship-shaped air vent avoids the occurrence of the situation where the first film 20 or the second film 40 is double-folded in the preset ventilation area after moving along the connecting belt 52 at the edge.

[0118] Optionally, when the reel 61 rolls the heat preservation layer 62 to the top position of the greenhouse, the reel 61 is mostly bent in most cases. In order to ensure that the heat preservation component drives the first film 20 or the second film 40 to evenly open the preset ventilation area, when the reel 61 is at the top position of the greenhouse, according to the size and state of the preset ventilation area required by this position, select the connection position of the tension belt 54 and the connecting belt 51 to ensure the consistency of the preset ventilation area when the reel 61 is at the top position of the greenhouse, and avoid the unevenness of opening or covering the preset ventilation area caused by the bending of the reel 61. Optionally, the external position of the connection between the connecting belt 51 and the tension belt 54 is located between the rotating member 52 near the top of the greenhouse and the top of the greenhouse, preventing the situation where the reel 61 rolls towards the bottom of the greenhouse and repeatedly opens or covers the preset ventilation area.

[0119] Optionally, the reset member 53 is located outside the greenhouse, and the number of the rotating members 52 is at least one, and at least one rotating member 52 is located outside the greenhouse.

[0120] Optionally, when the rotating member 52 is located inside the greenhouse, the rotating member 52 can be fixed on the greenhouse frame 10 or can be arranged on the greenhouse frame 10 in a detachable manner. When the fixed pulley is located outside the greenhouse, the rotating member 52 is connected to the film pressing rope. Optionally, a steel pipe is installed outside the greenhouse, and the length of the steel pipe is the same as the length of the greenhouse. Both ends of the steel pipe are fixed on the greenhouse frame, and the rotating member 52 outside the greenhouse is connected to the steel pipe. The use of this steel pipe ensures the convenience of installing multiple rotating members 52 outside the greenhouse. Optionally, a steel pipe is installed inside the greenhouse, and the length of the steel pipe is the same as the length of the greenhouse. The steel pipe is fixed on the greenhouse frame, and the rotating member 52 inside the greenhouse is connected to the steel pipe. The use of this steel pipe ensures the convenience of installing multiple rotating members 52 inside the greenhouse.

[0121] Specifically, the reset member 53 located outside the greenhouse can be an elastic reset member such as a rubber band or a spring. One end of the reset member 53 is connected to the top or bottom of the greenhouse or the film pressing rope, and the other end is connected to the connecting belt 51. At least one greenhouse rotating member 52 is used to define the movement track of the connecting belt 51, so as to ensure that the edges of the first film 20 or the second film 40 move along the greenhouse framework 10 under the action of the connecting belt 51, so as to open or cover the preset ventilation area and prevent damage to the first film 20 or the second film 40.

[0122] Optionally, the reset member 53 can 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 is connected to the connecting belt 51. Optionally, a rotating member 52 is arranged outside the greenhouse, 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. Starting from the end connected to the reset member 53, the connecting belt 51 is first connected to the first film 20 or the second film 40, then bypasses the rotating member 52 from below the rotating member 52, and finally the other end of the connecting belt 51 is connected to the tension belt 54. Optionally, the number of rotating members 52 is two. One rotating member 52 is arranged outside the greenhouse, and the other rotating member 52 is arranged inside the greenhouse. The outer rotating member 52 is 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, and the inner rotating member 52 is 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. Starting from the end connected to the reset member 53, the connecting belt 51 first passes through the position where the first film 20 and the second film 40 are partially connected or partially overlapped and penetrates into the inside of the greenhouse, bypasses the inner rotating member 52 from below the inner rotating member 52, then passes through the position where the first film 20 and the second film 40 are partially connected or partially overlapped and penetrates out of the greenhouse, and is connected to the first film 20 or the second film 40 at this position. Then it bypasses from below the outer rotating member 52, and finally the other end of the connecting belt 51 is connected to the tension belt 54. This structure ensures that when the reel 61 moves towards the top of the greenhouse, the preset ventilation area is opened (closed) to ventilate (insulate) the greenhouse, and when the reel 61 moves towards the bottom of the greenhouse, the preset ventilation area is closed (opened) to insulate (ventilate) the greenhouse.

[0123] Optionally, the reset member 53 can be a rubber band. One end of the rubber band is connected to the top of the greenhouse, and the other end is connected to the connecting belt 51. Optionally, a rotating member 52 is arranged outside the greenhouse, between the partially connected or partially overlapping position of the first film 20 and the second film 40 and the bottom of the greenhouse. Starting from the end connected to the reset member 53, the connecting belt 51 is first connected to the first film 20 or the second film 40, then bypasses the rotating member 52 from below the rotating member 52, and finally the other end of the connecting belt 51 is connected to the tension belt 54. Optionally, the number of rotating members 52 is three. Two rotating members 52 are arranged outside the greenhouse, and one rotating member 52 is arranged inside the greenhouse. The two rotating members 52 outside are between the partially connected or partially overlapping position of the first film 20 and the second film 40 and the bottom of the greenhouse, and the one rotating member 52 inside is between the partially connected or partially overlapping position of the first film 20 and the second film 40 and the top of the greenhouse. Starting from the end connected to the reset member 53, the connecting belt 51 bypasses from above the first rotating member outside the greenhouse, then penetrates into the inside of the greenhouse through the partially connected or partially overlapping position of the first film 20 and the second film 40, bypasses the inner rotating member 52 from below the inner rotating member 52, then penetrates out of the greenhouse from the partially connected or partially overlapping position of the first film 20 and the second film 40, and is connected to the first film 20 or the second film 40 here. After that, it bypasses from below the other rotating member 52 outside, and finally the other end of the connecting belt 51 is connected to the tension belt 54. This structure ensures that when the reel 61 moves towards the top of the greenhouse, the preset ventilation area is opened (closed) to ventilate (insulate) the greenhouse, and when the reel 61 moves towards the bottom of the greenhouse, the preset ventilation area is closed (opened) to insulate (ventilate) the greenhouse.

[0124] Optionally, referring to Figures 8 to 10 As shown, in a ventilation and heat preservation device for a greenhouse provided in an embodiment of the present invention, the reset member 53 is located inside the greenhouse, the number of rotating members 52 is at least two, and the rotating members 52 are respectively located on both sides of the overlapping position of the first film 20 and the second film 40 or on both sides of the connected position.

[0125] Optionally, the number of the rotating members 52 is two. One rotating member 52 is arranged outside the greenhouse, and the other rotating member 52 is arranged inside the greenhouse. The rotating member 52 outside is located between the position where the first film 20 and the second film 40 are partially joined or partially overlapped and the bottom of the greenhouse, and the rotating member 52 inside is located between the position where the first film 20 and the second film 40 are partially joined or partially overlapped and the top of the greenhouse. Starting from the end connected to the reset member 53, the connecting belt 51 bypasses the inner rotating member 52 from above, then passes through the greenhouse at the position where the first film 20 and the second film 40 are partially joined or partially overlapped, and is connected to the first film 20 or the second film 40 at this position. Then it bypasses from below the outer rotating member 52, and finally the other end of the connecting belt 51 is connected to the tension belt 54. This structure ensures that when the reel 61 moves towards the bottom of the greenhouse, the preset ventilation area is opened to ventilate the greenhouse (insulate the greenhouse), and when the reel 61 moves towards the top of the greenhouse, the preset ventilation area is closed to insulate the greenhouse (ventilate the greenhouse).

[0126] Optionally, referring to Figures 8 to 10 As shown, in a ventilation and heat preservation device for a greenhouse provided in an embodiment of the present invention, the number of the rotating members 52 is four. Two rotating members 52 are respectively arranged on both sides of the overlapping position or the joined position of the first film 20 and the second film 40. The rotating member 52 on the side of the first film 20 faces the outside of the greenhouse, and the two rotating members 52 on the side of the second film 40 face the inside of the greenhouse. The reset member 53 is located inside the greenhouse.

[0127] Starting from the end connected to the reset member 53, the connecting belt 51 bypasses one inner rotating member 52 from above, then passes through the greenhouse at the position where the first film 20 and the second film 40 are partially joined or partially overlapped. Then it bypasses from below the outer rotating member 52, then passes into the greenhouse at the position where the first film 20 and the second film 40 are partially joined or partially overlapped, and is connected to the second film 40 at this position. Then it bypasses from below the other inner rotating member 52, then passes through the greenhouse for the second time at the position where the first film 20 and the second film 40 are partially joined or partially overlapped. Then it bypasses from below the other outer rotating member 52, and finally the other end of the connecting belt 51 is connected to the tension belt 54. This structure ensures that when the reel 61 moves towards the top of the greenhouse, the preset ventilation area is opened to ventilate the greenhouse, and when the reel 61 moves towards the bottom of the greenhouse, the preset ventilation area is closed to insulate the greenhouse.

[0128] Optionally, depending on the structure of the connecting component 50, when the reel 51 rolls towards the top of the greenhouse, a preset ventilation area is opened, and when the reel 51 rolls towards the bottom of the greenhouse, the preset ventilation area is closed. Specifically, in the early morning of winter under suitable conditions, the reel 51 rotates from the bottom position of the greenhouse to the top position of the greenhouse, and the tension belt 54 is rolled on the reel 51 together with the thermal insulation layer 62 to expose the first film 20 and / or the second film 40, so as to ensure good lighting conditions in the greenhouse, ensure the increase of the temperature inside the greenhouse, and provide good temperature conditions and photosynthesis conditions for crop growth. When the reel 61 rolls to the connection point position of the tension belt 54 and the connection belt 51, the rotation is stopped to ensure that the preset ventilation area is not opened and to ensure the continuous rise of the greenhouse temperature; after reaching noon, under good lighting conditions, the temperature inside the greenhouse continues to rise. In order to ensure that the temperature inside the greenhouse is suitable for crop growth, the reel 61 is controlled to move a proper distance towards the top of the greenhouse. At this time, the thermal insulation component 60 drives the first film 20 or the second film 40 to open the preset ventilation area through the connecting component 50 to ventilate the greenhouse. While ensuring that the temperature inside the greenhouse is suitable, air exchange between the inside and outside of the greenhouse is also carried out, providing carbon dioxide required for photosynthesis for the crops. After noon, as the lighting conditions weaken, the temperature inside the greenhouse begins to drop. At this time, the reel 61 is controlled to move downward until the preset ventilation area is closed and then the movement stops to ensure that the temperature inside the greenhouse is suitable for crop growth. In the afternoon, as the lighting conditions continue to weaken, the reel 51 is controlled to move towards the bottom of the greenhouse, and the thermal insulation layer 62 completely covers the film component to insulate the inside of the greenhouse.

[0129] Optionally, depending on the different structures of the connecting component 50, when the reel 51 rolls towards the top of the greenhouse, the preset ventilation area is closed, and when the reel 51 rolls towards the bottom of the greenhouse, the preset ventilation area is opened. Specifically, in the winter morning under suitable conditions, the reel 61 rotates from the bottom position of the greenhouse to the top position of the greenhouse, and the tension belt 54 is wound on the reel 61 together with the thermal insulation layer 62 to expose the first film 20 and / or the second film 40, ensuring good lighting conditions in the greenhouse, so as to ensure the increase of the temperature inside the greenhouse, provide good temperature conditions for crop growth, and guarantee good photosynthesis conditions for the crops. When the reel 51 rolls to the 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. At this time, the reel 61 continues to rotate towards the top of the greenhouse. When the reel 61 reaches the connection point position of the tension belt 54 and the connecting belt 51, the reel 61 continues to rotate towards the top of the greenhouse. At this time, the thermal insulation component 60 drives the first film 20 or the second film 40 to cover the preset ventilation area through the connecting component 50 until the preset ventilation area is completely closed, and then the reel 61 stops rotating to ensure the continuous rise of the temperature inside the greenhouse and prevent the thermal insulation component 60 from falling from the top of the greenhouse to the back side of the greenhouse; after noon, under good lighting conditions, the temperature inside the greenhouse continues to rise. In order to ensure that the temperature inside the greenhouse is suitable for crop growth, the reel 61 is controlled to move a proper distance towards the bottom of the greenhouse. At this time, the thermal insulation component 60 drives the first film 20 or the second film 40 to open the preset ventilation area through the connecting component 50 to ventilate the greenhouse, ensuring the suitable temperature inside the greenhouse while also exchanging air between the inside and outside of the greenhouse and providing carbon dioxide required for photosynthesis for the crops. After noon, the lighting conditions weaken and the temperature inside the greenhouse begins to drop. At this time, the reel is controlled to move upward until the preset ventilation area is closed to ensure that the temperature inside the greenhouse is suitable for crop growth. In the afternoon, as the lighting conditions continue to weaken, the reel 61 needs to be controlled to move towards the bottom of the greenhouse. Before reaching the connection point position of the tension belt 54 and the connecting belt 51, the thermal insulation component 60 will drive the first film 20 or the second film 40 to open the preset ventilation area through the connecting component 50, and the reel 51 is controlled to continue to move towards the bottom of the greenhouse, and the thermal insulation layer will gradually cover the preset ventilation area until the film assembly is completely covered to insulate the inside of the greenhouse.

[0130] Optionally, a ventilation and thermal insulation device for a greenhouse provided by an embodiment of the present invention further includes an emergency stop switch 70, where the structure, position, and working principle of the emergency stop switch 70 are the same as those in the above-mentioned Embodiment 1, and will not be elaborated here one by one in this embodiment.

[0131] Optionally, a ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention further includes a control system 80. The structure and working principle of the control system 80 are the same as those in the first embodiment above, and will not be elaborated here one by one. The difference between the control system 80 in this embodiment and the control system 80 in the first embodiment above is that in this embodiment, the position detector 82 in the control system 80 is located at the top, bottom or side of the greenhouse, or above the top of the greenhouse. The controller 81 is configured to control the heat preservation assembly 60 to drive the first film 20 to completely or partially cover a preset ventilation area, or control the heat preservation assembly 60 to drive the second film 40 to completely or partially cover the preset ventilation area according to the position of the reel 61, so as to effectively control the ventilation volume of the preset ventilation area and accurately control the environment inside the greenhouse, which is beneficial to the growth of crops in the greenhouse.

[0132] In this embodiment, the position detector 82 can not only be located on the top bracket 11 of the greenhouse and / or on the bottom installation groove 12 of the greenhouse in the first embodiment above, but also on the swing arm assembly. Refer to Figure 8 As shown, optionally, when the position detector 82 is located above the top of the greenhouse, the position detector 82 is located on the swing arm assembly 64. Specifically, the swing arm assembly 64 includes a first connecting arm, a second connecting arm and a cable. The position detector 82 is connected to the cable to achieve power supply and data communication for the position sensor 82. The first connecting arm and the second connecting arm are hinged. The first connecting arm is hinged to the bottom of the greenhouse, and the second connecting arm is hinged to the driving member 63. The cable is connected to the driving member 63. This connection method ensures the stability of the driving member 63 when the driving member 63 moves synchronously with the reel 61, and guarantees the power supply and transmission of the control signal of the driving member. Optionally, the position detector 82 can be arranged on the first connecting arm, or on the first connecting arm and the second connecting arm. The position detector 82 detects the relative position of the first connecting arm and the ground, or the relative position of the first connecting arm and the second connecting arm to detect the position of the reel 61, so as to effectively control the ventilation volume of the preset ventilation area and accurately control the environment inside the greenhouse, which is beneficial to the growth of crops in the greenhouse.

[0133] Optionally, the position detector 82 can be measured by an inclination sensor HT2D485-S90 of Shenzhen Milang Technology.

[0134] Optionally, in this embodiment, the position detector 82 can be located on the side of the greenhouse. Optionally, bearings are assembled at the end positions of the rollers 61 on both sides of the greenhouse. One end of a rocker arm with variable arm length is connected to the bearing, and the other end is hinged to the ground. When the roller rolls on the greenhouse, the end of the rocker arm hinged to the ground rotates around the hinge point, and the other end of the rocker arm moves synchronously with the roller 61. Optionally, the change in the arm length can be achieved by sleeving two or more steel pipes with different diameters together. Optionally, an inclination sensor HT2D485-S90 of Shenzhen Milang Technology can be installed on the rocker arm. By measuring the angle between the rocker arm and the ground, the position of the roller 61 can be determined, thereby effectively controlling the ventilation volume of the preset ventilation area, precisely controlling the environment inside the greenhouse, and being beneficial to the growth of crops in the greenhouse.

[0135] Embodiment III

[0136] Figure 11 is a schematic diagram of the overall structure of a ventilation and heat preservation device for a greenhouse provided in Embodiment III of the present invention. Refer to Figure 11 As shown, the ventilation and heat preservation device for a greenhouse provided in the embodiment of the present invention includes a greenhouse framework 10, a connection assembly 50, a heat preservation assembly 60, and a film assembly covering the greenhouse framework. The film assembly includes a first film 20 and a second film 40. There is a preset ventilation area on the greenhouse framework 10. The first film 20 and the second film 40 jointly cover the preset ventilation area, and the areas covered by the first film 20 and the second film 40 are different;

[0137] The heat preservation assembly 60 includes a roller 61, a heat preservation layer 62 wound on the roller 61, and a driving member 63 connected to the roller. The driving member 63 is used to drive the roller 61 to rotate so that the heat preservation layer 62 covers the film assembly or is wound on the roller 61; The film assembly is connected to the heat preservation assembly 60 through the connection assembly 50 so that the heat preservation assembly 60 drives the film assembly to expose or cover the preset ventilation area.

[0138] Furthermore, the first film 20 covers the greenhouse framework 10. There are ventilation openings on the first film 20 to form a preset ventilation area. The second film 40 is connected to the first film 20, and the second film 40 covers the ventilation openings. The driving member is used to drive the roller 61 to rotate so that the heat preservation layer 62 covers the first film 20 or is wound on the roller 61;

[0139] The second film 20 is connected to the heat preservation layer 62 through the connection assembly 50 so that the heat preservation layer 62 drives the second film 40 to open or cover the ventilation openings.

[0140] In this embodiment, the structures and working principles of the greenhouse framework 10, the second film 40, the first film 20, the connection assembly 50, and the heat preservation assembly 60 are the same as those in Embodiment I above, and will not be elaborated one by one in this embodiment.

[0141] Optionally, a ventilation and heat preservation device for a greenhouse provided by an 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 in the first embodiment above, and details are not described herein one by one in this embodiment.

[0142] Optionally, a ventilation and heat preservation device for a greenhouse provided by an embodiment of the present invention further includes a control system 80, wherein the structure and working principle of the control system 80 are the same as those in the second embodiment above, and details are not described herein one by one in this embodiment.

[0143] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ventilation and heat preservation device for a greenhouse, characterized in that It includes a greenhouse framework, a connection component, a heat preservation component, and a film component covering the greenhouse framework. The film component includes a first film and a second film. There is a preset ventilation area on the greenhouse framework. The first film and the second film jointly cover the preset ventilation area, and the areas covered by the first film and the second film are different; The heat preservation component includes a reel, a heat preservation layer wound on the reel, and a driving member connected to the reel. The driving member is used to drive the reel to rotate so that the heat preservation layer covers the film component and / or winds on the reel; The film component is connected to the heat preservation component through the connection component so that the heat preservation component drives the film component to expose or cover the preset ventilation area, The first film covers the greenhouse framework. There are ventilation openings on the first film to form the preset ventilation area. The second film is connected to the first film, and the second film covers the ventilation openings. The driving member is used to drive the reel to rotate so that the heat preservation layer covers the first film or winds on the reel; The second film is connected to the heat preservation layer through the connection component so that the heat preservation layer drives the second film to open or cover the ventilation openings, The first film and the second film are partially joined or partially overlapped; The first film is connected to the heat preservation component through the connection component so that the heat preservation component drives the first film to open or cover the preset ventilation area; or the second film is connected to the heat preservation component through the connection component so that the heat preservation component drives the second film to open or cover the preset ventilation area.

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