Greenhouse ventilation device

Abstract

The utility model discloses a greenhouse ventilation device, which relates to the field of greenhouse ventilation, and comprises support rods, an exhaust fan fixed on the outer walls of the support rods and mounted between the two support rods, and a transmission mechanism mounted on the exhaust fan and used for isolating the support rods from outside air, the transmission mechanism comprises a sealing unit and a transmission unit; and the sealing unit is used for blocking air which passes through the exhaust fan and circulates from the outside. By arranging the transmission mechanism, when the exhaust fan needs to be used, downward pulling force is applied to the pull rod to drive the first transmission rod to rotate by 90 degrees so as to synchronously drive the second sealing plate to turn over, so that the first sealing plate synchronously turns over by 90 degrees under the action of the first bevel gear, the second bevel gear and the third bevel gear; therefore, the bottom of the exhaust fan is opened to exhaust the inside of the greenhouse, and the occurrence of diseases caused by dew formation of vegetables and greenhouse films is avoided.

Description

Technical Field

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

[0002] With the development of high molecular polymers such as polyvinyl chloride and polyethylene, plastic films are widely used in agriculture, generally for covering vegetables in small greenhouses, achieving the effect of early maturity and increased yield.

[0003] In the prior art, after the greenhouse is installed, it is necessary to exhaust the hot and humid air inside the greenhouse in order to achieve ventilation and regulate the moisture and heat, ensure the temperature of the greenhouse, and prevent condensation on vegetables and greenhouse film, which could lead to disease. Based on this, this utility model proposes a greenhouse ventilation device. Utility Model Content

[0004] The purpose of this utility model is to provide a greenhouse ventilation device in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a greenhouse ventilation device, including a support rod, an exhaust fan fixed to the outer wall of the support rod and installed between two support rods, and a transmission mechanism installed on the exhaust fan for isolating the support rod from the outside air;

[0006] The transmission mechanism includes a sealing unit and a transmission unit;

[0007] The sealing unit is used to block the air flowing between the exhaust fan and the outside.

[0008] The transmission unit is used to control the opening and closing of the sealing unit.

[0009] As a further embodiment of this utility model: the sealing unit includes a fixed sleeve, a first sealing plate, a second sealing plate, a first fixed sleeve, a second fixed sleeve, a first transmission rod, and a second transmission rod;

[0010] The fixed sleeve fixes the bottom axis of the exhaust fan and is connected to the bottom inner cavity of the exhaust fan. The inner cavity of the fixed sleeve is rotatably connected to a first transmission rod for the first fixed sleeve to fix and a second transmission rod for the second fixed sleeve to fix. The first sealing plate is fixedly connected to the outer wall of the first transmission rod through the first fixed sleeve fixed to the outer wall of the axial surface. The second sealing plate is fixedly connected to the outer wall of the second transmission rod through the second fixed sleeve fixed to the outer wall of the axial surface. The first sealing plate and the second sealing plate are symmetrically distributed.

[0011] As a further embodiment of this utility model: the transmission unit includes a first bevel gear, a second bevel gear, a third bevel gear, and a pull rod;

[0012] The first bevel gear fixed at the end of the first transmission rod drives the third bevel gear fixed at the end of the second transmission rod to thrust through the second bevel gear rotatably connected to the inner cavity of the fixed sleeve. A pull rod is rotatably connected at the other end of the first transmission rod at an eccentric position to provide tension for the rotation of the first transmission rod.

[0013] As a further improvement of this utility model: the top outer walls of the first sealing plate and the second sealing plate are each provided with a negative magnet corresponding to the positive magnet provided at the bottom of the exhaust fan.

[0014] As a further improvement of this utility model: the outer walls of the first sealing plate and the second sealing plate are generally semi-circular, and a sealing ring is provided at the contact position between the top of the first sealing plate and the bottom of the ring of the exhaust fan.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By setting up a transmission mechanism, when the exhaust fan needs to be used, a downward pulling force is applied to the pull rod, which drives the first transmission rod to rotate 90 degrees and simultaneously drives the second sealing plate to flip. Then, under the action of the first bevel gear, the second bevel gear, and the third bevel gear, the first sealing plate flips 90 degrees in sync, thereby opening the bottom of the exhaust fan to exhaust air into the greenhouse, preventing condensation on vegetables and greenhouse film, which can lead to diseases. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the installation structure of the exhaust fan of this utility model;

[0019] Figure 3 This is a schematic diagram of the transmission mechanism of this utility model.

[0020] In the diagram: 1. Support rod; 2. Connecting rod; 3. Exhaust fan; 4. Transmission mechanism; 401. Fixed sleeve; 402. First sealing plate; 403. Second sealing plate; 404. First fixed sleeve; 405. Second fixed sleeve; 406. First transmission rod; 407. First bevel gear; 408. Second bevel gear; 409. Third bevel gear; 410. Second transmission rod; 411. Pull rod. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-3 In this embodiment of the utility model, a greenhouse ventilation device includes a support rod 1, an exhaust fan 3 fixed to the outer wall of the support rod 1 and installed between two support rods 1 by means of 2, and a transmission mechanism 4 installed on the exhaust fan 3 for isolating the support rod 1 from the outside air.

[0023] Transmission mechanism 4 includes a sealing unit and a transmission unit;

[0024] The sealing unit is used to block the air flowing between the exhaust fan 3 and the outside.

[0025] The transmission unit is used to control the opening and closing of the sealing unit;

[0026] The sealing unit includes a fixed sleeve 401, a first sealing plate 402, a second sealing plate 403, a first fixed sleeve 404, a second fixed sleeve 405, a first transmission rod 406, and a second transmission rod 410.

[0027] The fixed sleeve 401 fixes the bottom axis position of the exhaust fan 3 and is connected to the bottom inner cavity of the exhaust fan 3. The inner cavity of the fixed sleeve 401 is rotatably connected to a first transmission rod 406 for the first fixed sleeve 404 to fix and a second transmission rod 410 for the second fixed sleeve 405 to fix. The first sealing plate 402 is fixedly connected to the outer wall of the first transmission rod 406 through the first fixed sleeve 404 fixed to the outer wall of the axial surface. The second sealing plate 403 is fixedly connected to the outer wall of the second transmission rod 410 through the second fixed sleeve 405 fixed to the outer wall of the axial surface. The first sealing plate 402 and the second sealing plate 403 are symmetrically distributed.

[0028] The transmission unit includes a first bevel gear 407, a second bevel gear 408, a third bevel gear 409, and a tie rod 411;

[0029] The first bevel gear 407, fixed at the end of the first transmission rod 406, drives the third bevel gear 409, fixed at the end of the second transmission rod 410, to thrust through the second bevel gear 408, which is rotatably connected to the inner cavity of the fixed sleeve 401. A pull rod 411, which provides tension for the rotation of the first transmission rod 406, is rotatably connected at the other end of the first transmission rod 406 at an eccentric position.

[0030] In this embodiment: when it is necessary to exhaust the moisture in the greenhouse, by applying a downward pulling force to the pull rod 411 hanging down to the person's hand, the pull rod 411, which is eccentrically set at the end of the first transmission rod 406, will apply a rotational pulling force to the first transmission rod 406, causing the first transmission rod 406 to drive the first bevel gear 407 fixed at the end to rotate 90 degrees. At the same time, the second fixing sleeve 405 fixed to the outer wall of the first transmission rod 406 will also rotate downward 90 degrees, so that the second sealing plate 403 fixed to the outer wall of the second fixing sleeve 405 will also be freed from the influence of the positive magnet at the bottom of the exhaust fan 3.

[0031] As the gear rotates 90 degrees, the second bevel gear 408, which meshes with the end of the first bevel gear 407, will also rotate synchronously. Since the first bevel gear 407 and the third bevel gear 409 are relatively symmetrical, and the second bevel gear 408 is horizontally positioned between the first bevel gear 407 and the third bevel gear 409, when the first bevel gear 407 rotates clockwise, the third bevel gear 409 will be affected by the second bevel gear 408 and rotate counterclockwise. This causes the second transmission rod 410 and the first fixing sleeve 404, which are fixed to the end of the third bevel gear 409, to rotate 90 degrees counterclockwise synchronously. This causes the synchronous rotation of the parts fixed to the outer wall of the first fixing sleeve 404. Consequently, the first sealing plate 402 and the second sealing plate 403 will rotate 90 degrees synchronously, thereby opening the bottom seal of the exhaust fan 3. This allows outside air to come into contact with the greenhouse air, and the exhaust fan 3 removes moisture and heat from the greenhouse, preventing condensation on vegetables and greenhouse film, which could lead to disease.

[0032] Please refer to this carefully. Figures 1-3 The top outer walls of the first sealing plate 402 and the second sealing plate 403 are each provided with a negative magnet corresponding to the positive magnet provided at the bottom of the exhaust fan 3. The outer walls of the first sealing plate 402 and the second sealing plate 403 are generally semi-circular. A sealing ring is provided at the contact position between the top of the first sealing plate 402 and the bottom of the ring of the exhaust fan 3.

[0033] In this embodiment: With this structure, when it is necessary to isolate the greenhouse from the outside air, by applying an upward push to the pull rod 411, which is located at the lowest point of the first transmission rod 406, the pull rod 411 pushes the first transmission rod 406 to rotate 90 degrees again. This causes the first transmission rod 406 to drive the first sealing plate 402 and the second sealing plate 403 to rotate in opposite directions, so that the first sealing plate 402 and the second sealing plate 403 are in a horizontal state again. Under the action of the negative magnets distributed at the top of the first sealing plate 402 and the second sealing plate 403, they come into contact with the positive magnet at the bottom of the exhaust fan 3 to position the first sealing plate 402 and the second sealing plate 403, thus completing the reset operation of the first sealing plate 402 and the second sealing plate 403.

[0034] It should also be noted that: the bottom of the fixed sleeve 401 at the contact position with the first fixed sleeve 404 and the second fixed sleeve 405 is provided with a groove for the first fixed sleeve 404 and the second fixed sleeve 405, and the top of the fixed sleeve 401 at the contact position with the first fixed sleeve 404 and the second fixed sleeve 405 is formed with a raised arc-shaped part. In this way, the connection of the overall structure of the fixed sleeve 401 is guaranteed without affecting the rotation of the first fixed sleeve 404 and the second fixed sleeve 405.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A greenhouse ventilation device, comprising support poles (1) and exhaust fans (3) installed between two support poles (1) by being fixed to the outer wall of the support poles (1) through (2), characterized in that, It also includes a transmission mechanism (4) installed on the exhaust fan (3) to isolate the support rod (1) from the outside air. The transmission mechanism (4) includes a sealing unit and a transmission unit; The sealing unit is used to block the air flowing between the exhaust fan (3) and the outside. The transmission unit is used to control the opening and closing of the sealing unit.

2. The greenhouse ventilation device according to claim 1, characterized in that, The sealing unit includes a fixed sleeve (401), a first sealing plate (402), a second sealing plate (403), a first fixed sleeve (404), a second fixed sleeve (405), a first transmission rod (406), and a second transmission rod (410). The fixed sleeve (401) fixes the bottom axis position of the exhaust fan (3) and is connected to the bottom inner cavity of the exhaust fan (3). The inner cavity of the fixed sleeve (401) is rotatably connected to a first transmission rod (406) for the first fixed sleeve (404) to be fixedly fitted, and a second transmission rod (410) for the second fixed sleeve (405) to be fixedly fitted. The first sealing plate (402) is fixedly connected to the outer wall of the first transmission rod (406) through the first fixed sleeve (404) fixed to the outer wall of the axial surface. The second sealing plate (403) is fixedly connected to the outer wall of the second transmission rod (410) through the second fixed sleeve (405) fixed to the outer wall of the axial surface. The first sealing plate (402) and the second sealing plate (403) are symmetrically distributed.

3. The greenhouse ventilation device according to claim 1, characterized in that, The transmission unit includes a first bevel gear (407), a second bevel gear (408), a third bevel gear (409), and a pull rod (411). The first bevel gear (407) fixed at the end of the first transmission rod (406) drives the third bevel gear (409) fixed at the end of the second transmission rod (410) to thrust through the second bevel gear (408) rotatably connected to the inner cavity of the fixed sleeve (401). At the other end of the first transmission rod (406), at an eccentric position, there is a pull rod (411) rotatably connected to provide tension for the rotation of the first transmission rod (406).

4. The greenhouse ventilation device according to claim 2, characterized in that, The top outer walls of the first sealing plate (402) and the second sealing plate (403) are each provided with a negative magnet corresponding to the positive magnet provided at the bottom of the exhaust fan (3).

5. The greenhouse ventilation device according to claim 2, characterized in that, The outer walls of the first sealing plate (402) and the second sealing plate (403) are generally semi-circular. A sealing ring is provided at the contact position between the top of the first sealing plate (402) and the bottom of the ring of the exhaust fan (3).

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