Inward opening type ventilation exhaust fan for square cabin
By introducing connecting rod and push rod components into the open ventilation exhaust fan in the square cabin, combined with thread locking and micro switch protection, the problem of exhaust doors in the prior art can only operate outside the cabin is solved, and a simple and safe fan start-up in the square cabin is achieved.
Patent Information
- Application Number
- CN202422237434.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The exhaust doors of the existing square cabin ventilation exhaust fan can only be opened from outside the cabin, resulting in cumbersome operation, especially when the installation surface is high, it cannot be opened outside the vehicle.
An internally open ventilation exhaust fan is designed. By setting a connecting rod assembly and push rod assembly between the exhaust door and the frame, the exhaust door is allowed to be opened from the cabin, and locking is achieved at any position through the matching of the screw and the threaded hole and the limiting parts, and the axial flow fan is protected in combination with a micro switch.
It realizes simple operation in the square cabin to open the exhaust door, solves the problem of cumbersome operation outside the cabin, and ensures safe and reliable fan start through limit and protection valve components.
Smart Images
Figure CN223241682U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ventilation and exhaust of square cabins, and particularly relates to an inward-opening ventilation and exhaust fan for square cabins. Background Art
[0002] Ventilation and exhaust fans are primarily used to exchange air between the interior and exterior of shelters and are essential components for shelters and other products. Existing ventilation and exhaust fan structures require operators to manually open the fan door while standing outside the shelter. Furthermore, when the fan is mounted on a high surface, operators cannot manually open the fan door from outside the vehicle, significantly increasing the complexity of the operation. Utility Model Content
[0003] The purpose of the utility model is to provide an inward-opening ventilation and exhaust fan for a square cabin, so as to solve the problem that the exhaust fan door of the existing square cabin can only be opened from the outside of the square cabin and the operation is cumbersome.
[0004] The utility model is achieved through the following technical solutions:
[0005] An inward-opening ventilation and exhaust fan for a shelter, comprising:
[0006] exhaust fan frame;
[0007] Axial flow fan, the axial flow fan is arranged in the exhaust fan frame;
[0008] The exhaust fan door is hingedly connected to the upper part of the front frame of the exhaust fan frame. A connecting rod assembly is provided on the exhaust fan door. One end of the connecting rod assembly is hingedly connected to the lower part of the front frame of the exhaust fan frame, and the other end is slidingly connected to the upper part of the exhaust fan door. A push rod assembly is provided in the exhaust fan frame for pushing the connecting rod assembly to rotate the exhaust fan door along its hinged end. One end of the push rod assembly is hinged to the connecting rod assembly, and the other end passes through the rear frame of the exhaust fan frame and extends to the inside of the cabin.
[0009] In some embodiments, the connecting rod assembly includes two vertical rods arranged side by side in the vertical direction and a horizontal rod arranged between the two vertical rods and connected to the two vertical rods at both ends. One end of the vertical rod is hingedly connected to the lower part of the exhaust fan frame, and the other end is slidingly connected to the upper part of the exhaust fan door. The horizontal rod is rotationally connected to the push rod assembly.
[0010] In some embodiments, a connecting seat is provided on the exhaust fan door at a corresponding position connected to the vertical rod, and a sliding groove is provided on the connecting seat along the vertical direction, and one end of the vertical rod is slidably connected in the sliding groove.
[0011] In some embodiments, the exhaust fan frame includes a front frame fixed to the outside of the shelter and a rear frame fixed to the inside of the shelter, and the push rod assembly includes:
[0012] A mounting base, with both ends of the mounting base respectively connected to the front frame and the rear frame of the exhaust fan frame through flanges;
[0013] A screw rod is arranged in the mounting seat for rotation along the axial direction of the mounting seat, and a limiting member for limiting the movement of the screw rod is arranged between the screw rod and the mounting seat;
[0014] The push rod is slidably arranged in the mounting seat and is coaxial with the screw rod. One end of the push rod is matched with the screw rod thread, and the other end is rotatably connected with the connecting rod assembly.
[0015] In some embodiments, a threaded hole is provided at one end of the push rod, and an annular connector is provided at the other end. The annular connector is sleeved on the cross bar and can rotate relative to the cross bar.
[0016] In some embodiments, the screw is a trapezoidal screw, and the threaded hole is a trapezoidal nut that cooperates with the trapezoidal screw.
[0017] In some embodiments, the limiting member includes an annular protrusion provided on the outer circumference of the screw, and an annular groove cooperating with the annular protrusion is provided on the inner side wall of the mounting seat.
[0018] The ventilation exhaust fan also includes a protection valve assembly, which can prevent the axial flow fan from being connected to the power supply when the exhaust fan door is in a closed state.
[0019] In some embodiments, the protective valve assembly includes a control button arranged on the front frame of the exhaust fan frame and a micro switch arranged on the exhaust fan door and cooperating with the control button. When the exhaust fan door is in a closed state, the micro switch presses the control button so that the axial flow fan cannot be connected to the power supply.
[0020] In some embodiments, a handle is provided on the end of the push rod assembly located inside the shelter.
[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0022] 1. The utility model is an inward-opening ventilation and exhaust fan for a square cabin, wherein a connecting rod assembly is provided between the exhaust fan door and the exhaust fan frame, wherein one end of the connecting rod assembly is hingedly connected to the lower part of the front frame of the exhaust fan frame, and the other end is slidably connected to the upper part of the exhaust fan door, and the exhaust fan door is rotated around its hinged end by being pushed by a push rod assembly connected to the connecting rod assembly and passing through the rear frame of the exhaust fan frame and extending into the square cabin; the ventilation and exhaust fan can drive the push rod inside the square cabin to open the exhaust fan door, which is simple to operate and solves the current problem that the exhaust fan door cannot be pushed open from inside the square cabin.
[0023] 2. The push rod assembly adopts the matching mode of screw and threaded hole, and limits the screw in the axial direction through the limiter, so that the exhaust fan door can be locked at any position.
[0024] 3. A control button is provided on the front frame of the ventilation exhaust fan, and a micro switch cooperating with the control button is provided on the exhaust fan door. When the exhaust fan door is in the closed state, the micro switch keeps pressing the control button so that the axial flow fan cannot be connected to the power supply. Only when the exhaust fan door is in the open state, the micro switch is separated from the control button, and the axial flow fan can be started at this time. This solves the problem of starting the axial flow fan when the exhaust fan door is not opened due to human operation factors, and plays a protective role for the axial flow fan. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0026] Figure 1 This is a schematic diagram of the internal structure of the ventilation and exhaust fan in an embodiment of the present utility model;
[0027] Figure 2 This is a schematic diagram of the external structure of the ventilation and exhaust fan in the embodiment of the present utility model;
[0028] Figure 3 This is a side view of a ventilation and exhaust fan in an embodiment of the present utility model;
[0029] Figure 4 This is a side sectional view of a ventilation and exhaust fan in an embodiment of the present utility model;
[0030] Figure 5 This is a schematic structural diagram of a push rod assembly in an embodiment of the present utility model;
[0031] Figure 6 It is a cross-sectional view of the push rod assembly in an embodiment of the present utility model.
[0032] Among them: 1. Exhaust fan frame, 11. Front frame, 12. Rear frame, 2. Exhaust fan door, 3. Axial fan, 4. Push rod assembly, 41. Mounting seat, 42. Screw, 43. Push rod, 44. Ring connector, 45. Handle, 46. Limiter, 47. Threaded hole, 5. Connecting rod assembly, 51. Vertical rod, 52. Horizontal rod, 6. Micro switch, 7. Control button, 8. Slide. DETAILED DESCRIPTION
[0033] In order to make the purpose, 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 in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.
[0034] Example 1
[0035] like Figures 1 to 4 As shown, an inward-opening ventilation and exhaust fan for a shelter comprises:
[0036] The exhaust fan frame 1 includes a front frame 11 fixed to the outside of the cabin and a rear frame 12 fixed to the inside of the cabin;
[0037] Axial flow fan 3, axial flow fan 3 is arranged in the exhaust fan frame 1;
[0038] Exhaust fan door 2, the exhaust fan door 2 is hingedly connected to the upper part of the front frame 11 of the exhaust fan frame 1, and a connecting rod assembly 5 is provided on the exhaust fan door 2. One end of the connecting rod assembly 5 is hingedly connected to the lower part of the front frame 11 of the exhaust fan frame 1, and the other end is slidingly connected to the upper part of the exhaust fan door 2. A push rod assembly 4 is provided in the exhaust fan frame 1 for pushing the connecting rod assembly 5 to rotate the exhaust fan door 2 along its hinged end. One end of the push rod assembly 4 is hinged to the connecting rod assembly 5, and the other end passes through the rear frame 12 of the exhaust fan frame 1 and extends to the inside of the cabin.
[0039] In this embodiment, a connecting rod assembly 5 is provided between the exhaust fan door 2 and the exhaust fan frame 1, one end of the connecting rod assembly 5 is hingedly connected to the lower part of the front frame 11 of the exhaust fan frame 1, and the other end is slidingly connected to the upper part of the exhaust fan door 2. The exhaust fan door 2 is rotated around its hinged end by being pushed by the push rod assembly 4 connected to the connecting rod assembly 5 and passing through the rear frame 12 of the exhaust fan frame 1 and extending into the cabin; the ventilation exhaust fan can drive the push rod 43 inside the cabin to open the exhaust fan door 2, which is simple to operate and solves the current problem that the exhaust fan door 2 cannot be pushed open from inside the cabin.
[0040] like Figure 1 and Figure 4As shown, the connecting rod assembly 5 includes two vertical rods 51 arranged side by side in the vertical direction, and a cross rod 52 arranged between the two vertical rods 51 and connected to the two vertical rods 51 at both ends. A connecting seat is provided on the exhaust fan door 2 at the corresponding position connected to the vertical rods 51. The connecting seat is provided with a slide groove 8 in the vertical direction. One end of the vertical rod 51 is slidably connected in the slide groove 8, and the vertical rod 51 can rotate in the vertical plane along the connecting seat. The cross rod 52 is rotatably connected to the push rod assembly 4. By arranging the two vertical rods 51 side by side, the force on the exhaust fan door 2 is more balanced. The cross rod 52 is provided between the two vertical rods 51, and the push rod assembly 4 is connected to the cross rod 52. At this time, the push rod assembly 4 and the connecting rod assembly 5 form a four-bar structure. The cross rod 52 can drive the two vertical rods 51 to move synchronously, making it easier to push the exhaust fan door 2 open.
[0041] like Figure 2 As shown, the push rod assembly 4 is arranged in the exhaust fan frame 1 and outside the axial flow fan 3, which can avoid interference between the push rod assembly 4 and the blades of the axial flow fan 3.
[0042] Example 2
[0043] like Figures 2 to 6 As shown, the push rod assembly 4 includes:
[0044] The mounting base 41 has two ends connected to the front frame 11 and the rear frame 12 of the exhaust fan frame 1 through flanges;
[0045] A screw 42 is rotatably disposed in the mounting seat 41 along the axial direction of the mounting seat 41 , and a limiting member 46 is disposed between the screw 42 and the mounting seat 41 to limit movement of the screw 42 ;
[0046] The push rod 43 is slidably disposed in the mounting seat 41 and is coaxial with the screw rod 42 , one end of the push rod 43 is threadedly engaged with the screw rod 42 , and the other end is rotationally engaged with the connecting rod assembly 5 .
[0047] The screw 42 rotates and, under the action of the limit member 46, drives the push rod 43 threadedly connected to the screw 42 to move along its axial direction, thereby driving the connecting rod assembly 5 and acting on the exhaust fan door 2, so that the exhaust fan door 2 can be opened from the inside of the cabin. This method has a simple structure and is more labor-saving than the traditional door-pushing method; the push rod 43 and the screw 42 adopt a threaded matching method, which can enable the exhaust fan door 2 to be locked at any position, solving the problem that the exhaust fan door 2 of the existing structure can usually only be opened at a 45° angle at one time and the exhaust fan door 2 cannot be locked at any position.
[0048] like Figure 5As shown, in some embodiments, a threaded hole 47 is provided at one end of the push rod 43 , and an annular connector 44 is provided at the other end. The annular connector 44 is sleeved on the cross bar 52 and can rotate relative to the cross bar 52 .
[0049] like Figure 6 As shown, in some embodiments, the screw 42 is a trapezoidal screw 42, and the threaded hole 47 is a trapezoidal nut that cooperates with the trapezoidal screw 42; the cooperation between the trapezoidal screw 42 and the trapezoidal nut can achieve efficient transmission, and this threaded connection method has a strong load capacity.
[0050] Reference Figure 6 The limiting member 46 includes an annular protrusion arranged on the outer circumference of the screw 42, and an annular groove cooperating with the annular protrusion is provided on the inner side wall of the mounting seat 41. The annular protrusion rotates in the annular groove to limit the movement of the screw 42 along its axial direction.
[0051] In some embodiments, as Figures 1 to 6 As shown, a handle 45 is provided on the end of the push rod assembly 4 located in the cabin to facilitate the staff to screw the screw 42.
[0052] Example 3
[0053] like Figure 1 As shown, the ventilation exhaust fan further includes a protection valve assembly, which can prevent the axial flow fan 3 from being connected to the power supply when the exhaust fan door 2 is in a closed state.
[0054] The protective valve assembly includes a control button 7 arranged on the front frame 11 of the exhaust fan frame 1 and a micro switch 6 arranged on the exhaust fan door 2 and cooperating with the control button 7. When the exhaust fan door 2 is in a closed state, the micro switch 6 always presses the control button 7 so that the axial flow fan 3 cannot be connected to the power supply. Only when the exhaust fan door 2 is in an open state, the micro switch 6 is separated from the control button 7. At this time, the axial flow fan 3 can be started, which solves the problem of starting the axial flow fan 3 when the exhaust fan door 2 is not opened due to human operation factors, and plays a protective role for the axial flow fan 3.
[0055] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.
[0056] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this invention does not necessarily mean that the components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that the direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0057] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.
Claims
1. An inward-opening ventilation and exhaust fan for a shelter, comprising: Exhaust fan frame (1); An axial flow fan (3), wherein the axial flow fan (3) is arranged in the exhaust fan frame (1); An exhaust fan door (2) is hingedly connected to the upper part of the exhaust fan frame (1); a connecting rod assembly (5) is provided on the exhaust fan door (2); one end of the connecting rod assembly (5) is hingedly connected to the lower part of the exhaust fan frame (1), and the other end is slidably connected to the upper part of the exhaust fan door (2); a push rod assembly (4) is provided in the exhaust fan frame (1) for pushing the connecting rod assembly (5) to rotate the exhaust fan door (2) along its hinged end; one end of the push rod assembly (4) is hingedly connected to the connecting rod assembly (5), and the other end passes through the exhaust fan frame (1) along the axis of the exhaust fan frame (1) and extends into the interior of the cabin.
2. The inward-opening ventilation and exhaust fan for a shelter according to claim 1, characterized in that: The connecting rod assembly (5) comprises two vertical rods (51) arranged side by side in a vertical direction, and a cross rod (52) arranged between the two vertical rods (51) and connected to the two vertical rods (51) at both ends. One end of the vertical rod (51) is hingedly connected to the lower part of the exhaust fan frame (1), and the other end is slidably connected to the upper part of the exhaust fan door (2). The cross rod (52) is rotationally connected to the push rod assembly (4).
3. The inward-opening ventilation and exhaust fan for a shelter according to claim 2, characterized in that: A connecting seat is provided on the exhaust fan door (2) at a corresponding position connected to the vertical rod (51), and a sliding groove (8) is provided on the connecting seat along the vertical direction, and one end of the vertical rod (51) is slidably connected in the sliding groove (8).
4. The inward-opening ventilation and exhaust fan for a shelter according to claim 1, characterized in that: The exhaust fan frame (1) comprises a front frame (11) fixed to the outside of the cabin and a rear frame (12) fixed to the inside of the cabin, and the push rod assembly (4) comprises: A mounting seat (41), wherein both ends of the mounting seat (41) are respectively connected to the front frame (11) and the rear frame (12) of the exhaust fan frame (1) through flanges; a screw rod (42), the screw rod (42) being rotatably arranged in the mounting seat (41) along the axial direction of the mounting seat (41), and a limiting member (46) for limiting the movement of the screw rod (42) being arranged between the screw rod (42) and the mounting seat (41); A push rod (43) is slidably arranged in the mounting seat (41) and is coaxial with the screw rod (42), one end of the push rod (43) is threadedly engaged with the screw rod (42), and the other end is rotationally engaged with the connecting rod assembly (5).
5. The inward-opening ventilation and exhaust fan for a shelter according to claim 4, characterized in that: One end of the push rod (43) is provided with a threaded hole (47), and the other end is provided with an annular connector (44). The annular connector (44) is sleeved on the cross bar (52) and can rotate relative to the cross bar (52).
6. The inward-opening ventilation and exhaust fan for a shelter according to claim 5, characterized in that: The threads of the screw rod (42) and the threads of the threaded hole (47) are both trapezoidal threads.
7. The inward-opening ventilation and exhaust fan for a shelter according to claim 4, characterized in that: The limiting member (46) includes an annular projection arranged on the outer circumference of the screw (42), and an annular groove matching the annular projection is provided on the inner side wall of the mounting seat (41).
8. The inward-opening ventilation and exhaust fan for a shelter according to claim 1, characterized in that: It also includes a protection valve assembly, which can keep the axial flow fan (3) disconnected from the power supply at all times when the exhaust fan door (2) is in a closed state.
9. The inward-opening ventilation and exhaust fan for a shelter according to claim 8, characterized in that: The protective valve assembly comprises a control button (7) arranged on the exhaust fan frame (1) and a micro switch (6) arranged on the exhaust fan door (2) and cooperating with the control button (7). When the exhaust fan door (2) is in a closed state, the micro switch (6) presses the control button (7) so that the axial flow fan (3) is always disconnected from the power supply.
10. The inward-opening ventilation and exhaust fan for a shelter according to claim 1, characterized in that: A handle (45) is provided on the end of the push rod assembly located in the cabin.