Ventilation device for greenhouse

Abstract

The ventilation device comprises an outer shell and a rotating part, a supporting frame is fixedly installed in the outer shell, the outer shell is further provided with connecting frames arranged at the two ends of the outer shell, a filter screen is vertically arranged in the connecting frames in a sliding mode, a handle is arranged at the top of the filter screen, the rotating part is arranged in the outer shell, and the rotating part is arranged in the outer shell. The rotating part is provided with a rotating shaft rotationally arranged in the supporting frame, one end of the rotating shaft is connected with a driving unit in the shell, the other end of the rotating shaft is detachably connected with the fan blades, a sliding block is transversely arranged in the rotating shaft in a sliding mode, and the sliding block slides to abut against the fan blades so as to fix the positions of the fan blades. Through the arrangement of the rotating part, the fan blades can be quickly disassembled and assembled through transverse sliding of the sliding block, meanwhile, stable connection of the fan blades and the rotating shaft is guaranteed, and the ventilation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of greenhouse technology, specifically to a ventilation device for greenhouses. Background Technology

[0002] Greenhouses are facilities used to cultivate plants. During seasons unsuitable for plant growth, they allow light to pass through and retain heat, extending the growing season for vegetables or fruits. To increase yields, greenhouses have become widely used. Greenhouses require frequent ventilation, which has many beneficial effects on greenhouse vegetables and plants, including cooling, dehumidification, regulating and replenishing carbon dioxide, and removing harmful gases.

[0003] Currently, the ventilation methods for greenhouses are mainly divided into natural ventilation and mechanical ventilation. Mechanical ventilation uses fans to force air out and improve air circulation efficiency. However, the blades of existing fans are usually fixed with fastening screws. When replacing them, operators need to use tools to remove them, and the removal efficiency is not high. Utility Model Content

[0004] The purpose of this utility model is to provide a ventilation device for greenhouses, in order to solve the problem mentioned in the background art, where the blades of existing fans are usually fixed by fastening screws, and when replacing them, operators need to use tools to remove them, and the removal efficiency is not high.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ventilation device for greenhouses, comprising a shell and a rotating part:

[0006] The housing has a support frame fixedly installed inside. The rotating part is located inside the housing and has a rotating shaft that is rotatably installed in the support frame. One end of the rotating shaft is connected to the drive unit inside the housing, and the other end of the rotating shaft is detachably connected to the fan blade. A sliding block is slidably installed inside the rotating shaft, and the sliding block slides and abuts against the fan blade to fix the position of the fan blade.

[0007] By adopting the above technical solution, the fan blades can be quickly disassembled and assembled by sliding the sliding block laterally, while ensuring a stable connection between the fan blades and the shaft, thereby improving ventilation efficiency.

[0008] Preferably, the housing also has connecting brackets at both ends of the housing, with a filter screen vertically slidably disposed inside the connecting brackets, and a handle provided on the top of the filter screen.

[0009] By adopting the above technical solution, the filter screen can be easily pulled out by the handle, making it easy to clean the dust or debris accumulated on the filter screen and ensuring ventilation quality.

[0010] Preferably, the inside of the rotating shaft has a transverse groove, and two sliding blocks are embedded in the groove and slidably connected to the rotating shaft. The two sliding blocks are arranged in a mirror image along the axis of the rotating shaft.

[0011] By adopting the above technical solution, the force on the fan blades can be evenly distributed through the mirror-symmetrical sliding block structure, avoiding shaft deformation caused by stress concentration on one side.

[0012] Preferably, cylindrical grooves are provided on the sides of the two sliding blocks, and a spring is embedded in the grooves, with the spring located between the two sliding blocks.

[0013] By adopting the above technical solution, the elastic force of the spring can provide thrust, pushing the two sliding blocks to displace and lock the position of the fan blade.

[0014] Preferably, the rotating part also has a locking head disposed at one end of the sliding block, the locking head extending to the outside of the rotating shaft and abutting against the fan blade, and a toggle plate disposed at one end of the sliding block.

[0015] By adopting the above technical solution, the extension and retraction of the chuck can be manually controlled by the toggle plate, enabling the fan blades to be released quickly and facilitating maintenance operations.

[0016] Preferably, the rotating part also has a limiting block disposed on the side of the rotating shaft, and the side of the fan blade has a slot, the limiting block being embedded in the slot and engaging with the fan blade.

[0017] By adopting the above technical solution, the axial displacement of the fan blades during rotation can be prevented by the engagement of the limiting block and the slot, thus ensuring operational stability.

[0018] Preferably, four limiting blocks are provided, and the four limiting blocks are arranged in a central rotational symmetric structure around the axis of rotation.

[0019] By adopting the above technical solution, the centrifugal force of the fan blades can be evenly distributed by four symmetrically distributed limiting blocks, thereby reducing the vibration and noise of the rotating shaft.

[0020] Preferably, the side of the limiting block is inclined, and the side of the limiting block that abuts against the slot is curved.

[0021] By adopting the above technical solution, the frictional loss between the limiting block and the slot can be reduced through the inclined arc surface design, making it easier for the limiting block to slide into the slot.

[0022] Compared with the prior art, the beneficial effects of this utility model are: by providing a rotating part, the fan blades can be quickly disassembled and assembled by the lateral sliding of the sliding block, while ensuring a stable connection between the fan blades and the rotating shaft, thus improving ventilation efficiency; when maintenance is required, simply press the toggle plate inward, so that the two toggle plates move inward against the spring force, which will cause the clip to retract and release the fixation of the fan blades. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the overall structure of this application;

[0025] Figure 3 This is a schematic cross-sectional view of the rotating part of this application;

[0026] Figure 4 This is a schematic cross-sectional view of the rotating part of this application;

[0027] Figure 5 This is a schematic diagram of the shaft structure of this application;

[0028] Figure 6 This is a schematic diagram of the fan blade structure of this application.

[0029] In the diagram: 1. Outer shell; 101. Support frame; 102. Connecting frame; 103. Filter screen; 2. Rotating part; 201. Rotating shaft; 202. Fan blade; 203. Sliding block; 204. Actuating plate; 205. Clip; 206. Spring; 207. Slot; 208. Limiting block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a technical solution: a ventilation device for greenhouses, comprising a housing 1 and a rotating part 2.

[0033] A support frame 101 is fixedly installed inside the outer casing 1, and connecting frames 102 are fixedly installed at both ends of the outer casing 1. The fixing method is an existing detachable fixing method, such as bolt connection or buckle connection. A filter screen 103 is vertically slidably installed inside the connecting frame 102. The filter screen 103 is made of 304 stainless steel with a mesh diameter of 0.5mm, which can effectively filter dust and impurities in the air. The top of the filter screen 103 is equipped with a non-slip rubber handle, which can be used to easily pull out the filter screen 103 for cleaning and maintenance, making it easy to clean the dust or debris accumulated on the filter screen 103 and ensure ventilation quality.

[0034] The rotating part 2 is located inside the outer casing 1. A rotating shaft 201 is rotatably mounted inside the support frame 101. The support frame 101 adopts a cross-shaped structure design. One end of the rotating shaft 201 is connected to the drive unit inside the outer casing 1. The drive unit uses a motor connected to the rotating shaft 201 via belt drive. The working principle of the motor is based on electromagnetic induction and Lorentz force. The motor generates force in a magnetic field through current, thereby driving mechanical motion. The above is the prior art and will not be elaborated further below. When selecting a model, its power should be selected to match the needs of the device to ensure that the object to be driven is driven. The other end of the rotating shaft 201 is detachably connected to the fan blade 202. A sliding block 203 is laterally slidably mounted inside the rotating shaft 201. The sliding block 203 slides and abuts against the fan blade 202 to fix the position of the fan blade 202. The fan blade 202 can be quickly disassembled and assembled by the lateral sliding of the sliding block 203, while ensuring a stable connection between the fan blade 202 and the rotating shaft 201, thereby improving ventilation efficiency.

[0035] Example 2

[0036] Please see Figure 4 , Figure 5 and Figure 6 This embodiment provides a technical solution: a ventilation device for greenhouses, comprising a rotating part 2, a rotating shaft 201, and fan blades 202.

[0037] The inside of the rotating shaft 201 is provided with a horizontal groove. Two sliding blocks 203 are embedded in the groove and slidably connected to the rotating shaft 201. The two sliding blocks 203 are arranged in a mirror image along the axis of the rotating shaft 201. The force on the fan blade 202 can be evenly distributed through the mirror symmetrical structure of the sliding blocks 203, avoiding deformation of the rotating shaft 201 caused by stress concentration on one side.

[0038] The two sliding blocks 203 have cylindrical grooves on their sides, and springs 206 are embedded in the grooves. The springs 206 are located between the two sliding blocks 203. The elastic force of the springs 206 can provide a pushing force to push the two sliding blocks 203 to move and lock the position of the fan blade 202. The springs 206 are in an open state when there is no external force. The springs 206 continuously provide elastic pushing force, so that the sliding blocks 203 always maintain close contact with the fan blade 202. When the actuating plate 204 is subjected to external force, the two actuating plates 204 move inward against the elastic force of the springs 206, which can retract the locking head 205 and release the fixation of the fan blade 202.

[0039] A locking head 205 is integrally provided at one end of the sliding block 203. The locking head 205 extends to the outside of the rotating shaft 201 and abuts against the fan blade 202. A toggle plate 204 is provided at one end of the sliding block 203. The extension and retraction of the locking head 205 can be manually controlled by the toggle plate 204 to realize the quick release of the fan blade 202, which is convenient for maintenance and operation.

[0040] A limiting block 208 is provided on the side of the rotating shaft 201, and a slot 207 is provided on the side of the fan blade 202. The limiting block 208 is embedded in the slot 207 and is fitted and connected to the fan blade 202. The axial displacement of the fan blade 202 during rotation can be prevented by the fitting of the limiting block 208 and the slot 207, thus ensuring operational stability.

[0041] Four limit blocks 208 are provided. The four limit blocks 208 are arranged in a central rotational symmetric structure around the axis of the rotating shaft 201. The centrifugal force of the fan blade 202 can be evenly distributed by the four symmetrically distributed limit blocks 208, thereby reducing the vibration and noise of the rotating shaft 201.

[0042] The side of the limiting block 208 is inclined, and the side of the limiting block 208 that abuts against the slot 207 is curved. The inclined curved surface design can reduce the frictional loss between the limiting block 208 and the slot 207, making it easier for the limiting block 208 to slide into the slot 207.

[0043] Working Principle: First, the entire outer casing 1 is installed on the wall of the greenhouse. When the drive unit starts, the motor drives the rotating shaft 201 to rotate via belt drive. The rotational motion of the rotating shaft 201 is transmitted to the fan blades 202 through the sliding block 203 mechanism inside. During the rotation of the fan blades 202, due to the contact and fixation between the sliding block 203 and the fan blades 202, and the engagement of the limiting block 208 and the slot 207, the fan blades 202 can rotate synchronously and stably with the rotating shaft 201, generating forced airflow to achieve greenhouse ventilation. During operation, the four symmetrically distributed limiting blocks 208 can evenly distribute the centrifugal force generated by the fan blades 202, effectively reducing the vibration and noise of the rotating shaft 201. At the same time, the spring 206 continuously provides elastic thrust to ensure that the sliding block 203 always maintains close contact with the fan blades 202, preventing loosening. When maintenance is required, simply press the actuating plate 204 inwards, causing the two actuating plates 204 to move inwards against the elastic force of the spring 206, which will retract the clamp 205, releasing the fixation on the fan blade 202 and enabling quick disassembly. The filter screen 103 can be easily pulled out for cleaning via the handle, ensuring ventilation quality. The entire device, through its precisely designed mechanical structure and optimized force distribution, achieves efficient, stable, and easy-to-maintain greenhouse ventilation.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for a greenhouse, characterized in that include: The outer casing, with a support frame fixedly installed inside; The rotating part is located inside the housing. The rotating part has a rotating shaft that is rotatably mounted in the support frame. One end of the rotating shaft is connected to the drive unit inside the housing, and the other end of the rotating shaft is detachably connected to the fan blade. A sliding block is laterally slidably mounted inside the rotating shaft. The sliding block slides and abuts against the fan blade to fix the position of the fan blade.

2. The ventilation device for a greenhouse according to claim 1, characterized in that: The housing also has connecting brackets at both ends of the housing, with a filter screen vertically sliding inside the connecting brackets, and a handle on top of the filter screen.

3. The ventilation device for a greenhouse according to claim 1, characterized in that: The shaft has a transverse groove inside, and two sliding blocks are embedded in the groove and slidably connected to the shaft. The two sliding blocks are arranged in a mirror image along the axis of the shaft.

4. The ventilation device for a greenhouse according to claim 3, characterized in that: The two sliding blocks have cylindrical grooves on their sides, and springs are embedded in the grooves, with the springs located between the two sliding blocks.

5. The ventilation device for a greenhouse according to claim 1, characterized in that: The rotating part also has a locking head at one end of the sliding block, which extends to the outside of the rotating shaft and abuts against the fan blade, and a toggle plate is provided at one end of the sliding block.

6. The ventilation device for a greenhouse according to claim 1, characterized in that: The rotating part also has a limiting block disposed on the side of the rotating shaft, and the side of the fan blade has a slot, into which the limiting block is embedded and connected with the fan blade.

7. The ventilation device for a greenhouse according to claim 6, characterized in that: There are four limit blocks, and the four limit blocks are arranged in a central rotational symmetry structure around the axis of rotation.

8. The ventilation device for a greenhouse according to claim 7, characterized in that: The side of the limiting block is inclined, and the side of the limiting block that abuts against the slot is curved.

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