Positive pressure ventilation mechanism of prefabricated cabin

Abstract

The utility model relates to a positive pressure ventilation mechanism of a prefabricated cabin, which belongs to the technical field of ventilation and comprises a rectangular frame and a ventilation box fixedly mounted at the top of the rectangular frame, and a ventilation dustproof mechanism is arranged between the rectangular frame and the ventilation box and comprises a ventilation fan fixedly mounted in the ventilation box. Rectangular plates are fixedly mounted on the surfaces of the opposite sides of the inner side of the rectangular frame. According to the positive pressure ventilation mechanism of the prefabricated cabin, the ventilation box is arranged on the rectangular frame, the ventilation fan is arranged in the ventilation box, and the filter screen plate and the filter plate can suck external air into the prefabricated cabin and filter dust and impurities in the air; and meanwhile, dust on the body of a person entering the prefabricated cabin is blown away through mutual cooperation of a first draught fan and an air outlet hole, the dust can be discharged out of a rectangular frame and the prefabricated cabin through mutual cooperation of a second draught fan and a dust suction opening, and the situation that the dust and impurities on the body of a user are brought into the prefabricated cabin is advantageously prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation, in particular to a positive pressure ventilation mechanism of a prefabricated cabin. Background Art

[0002] Prefabricated cabins refer to cabins or rooms that are pre-manufactured in a factory and then transported to the site for installation and assembly. Prefabricated cabins are often used in construction projects, which can save construction time and costs and improve construction quality and safety. Prefabricated cabins can be modular building units for different purposes such as residences, commercial buildings, offices, schools, etc.

[0003] Chinese patent CN218176781 U discloses a prefabricated cabin with a positive pressure ventilation device, including a prefabricated cabin main body, two groups of exhaust holes are opened on the left side of the prefabricated cabin main body, the inner wall of each group of exhaust holes is provided with an exhaust assembly, each group of exhaust assembly includes an exhaust bend, and the output end of each group of exhaust bend is connected to a negative pressure fan. The prefabricated cabin with a positive pressure ventilation device, through the exhaust assembly and the air inlet assembly, allows the positive pressure fan to drive the air filtered by the low pressure filter into the prefabricated cabin main body, and at the same time, the negative pressure fan drives the air in the prefabricated cabin main body to be discharged. In this process, the air input speed of the positive pressure fan is greater than the air output speed of the negative pressure fan, so that the prefabricated cabin main body always maintains a positive pressure state, greatly reducing the probability of external dust particles entering the device, effectively improving the protection of the prefabricated cabin to functional equipment, thereby enhancing the practicality of the device.

[0004] The above patent improves upon the disadvantage that the environment of the prefabricated cabin in the prior art is relatively complex, which makes it easy for external dust particles to enter the interior of the prefabricated cabin, reducing the protectiveness of the prefabricated cabin to functional equipment. The present embodiment provides another implementation scheme for the problems raised in the above patent. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a positive pressure ventilation mechanism for a prefabricated cabin, which has the advantage of preventing dust from entering the interior of the prefabricated cabin. It solves the problem that the environment of the prefabricated cabin in the prior art is relatively complex, which makes it easy for external dust particles to enter the interior of the prefabricated cabin, thereby reducing the protectiveness of the prefabricated cabin to functional equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positive pressure ventilation mechanism of a prefabricated cabin, comprising a rectangular frame and a ventilation box fixedly mounted on the top of the rectangular frame, a ventilation and dust prevention mechanism being provided between the rectangular frame and the ventilation box;

[0007] The ventilation and dust prevention mechanism includes a ventilation fan fixedly installed inside the ventilation box, a rectangular plate is fixedly installed on the opposite side surfaces of the inner side of the rectangular frame, a first air guide cavity and a second air guide cavity are provided inside the rectangular plate, an inner surface of the first air guide cavity is provided with an air outlet connected to the outer surface of the rectangular plate, and an inner surface of the second air guide cavity is provided with a dust suction port connected to the outer surface of the rectangular plate, and a first fan and a second fan are fixedly installed on the opposite side surfaces of the rectangular frame, the first fan is connected to the first air guide cavity, and the second fan is connected to the second air guide cavity.

[0008] Furthermore, there are multiple air outlet holes, and the multiple air outlet holes are evenly distributed on the surface of the rectangular plate.

[0009] Furthermore, the air outlet is obliquely arranged on the surface of the rectangular plate, and the inclination direction of the air outlet is toward the dust suction port.

[0010] Furthermore, the surface shape of the dust suction port is strip-shaped, and the cross-sectional shape of the dust suction port is cone-shaped, so as to facilitate extraction of air passing through the surface of the dust suction port.

[0011] Furthermore, an anti-blocking net is fixedly installed on the inner surface of the air outlet.

[0012] Furthermore, a U-shaped groove is inserted into the inner side of the ventilation box, a filter mesh plate is fixedly installed into the inner side of the ventilation box, two mesh plates are fixedly installed into the inner surface of the U-shaped groove, and a filter plate is inserted between the two mesh plates.

[0013] Furthermore, a ventilation plate located outside the ventilation box is fixedly mounted on the surface of one end of the U-shaped groove.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The positive pressure ventilation mechanism of the prefabricated cabin is provided with a ventilation box on a rectangular frame, and a ventilation fan, a filter screen plate and a filter plate are provided in the ventilation box, so that outside air can be drawn into the prefabricated cabin and dust and impurities in the air can be filtered. At the same time, a first fan, a second fan and a rectangular plate are provided on the rectangular frame, a first air guide cavity and a second air guide cavity are provided on the rectangular plate, an air outlet is provided on the first air guide cavity, and a dust suction port is provided on the second air guide cavity. When in use, the dust on the body of the person entering the prefabricated cabin can be blown away by the mutual cooperation of the first fan and the air outlet, and the dust can be discharged to the outside of the rectangular frame and the prefabricated cabin by the mutual cooperation of the second fan and the dust suction port, which is beneficial to prevent the user from bringing the dust and impurities on the body into the prefabricated cabin, and solves the problem that the environment of the prefabricated cabin in the prior art is relatively complex, which makes it easy for external dust particles to enter the interior of the prefabricated cabin, thereby reducing the protectiveness of the prefabricated cabin to functional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of a rectangular plate structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the interior of the ventilation box of the utility model structure;

[0019] Figure 4 This is a schematic diagram of the U-shaped groove structure of the utility model.

[0020] In the figure: 1. rectangular frame; 2. ventilation box; 3. ventilation fan; 4. rectangular plate; 5. first air guide cavity; 6. second air guide cavity; 7. air outlet; 8. dust suction port; 9. first fan; 10. second fan; 11. anti-blocking net; 12. U-shaped groove; 13. filter screen plate; 14. mesh plate; 15. filter plate; 16. ventilation plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 In the present embodiment, a positive pressure ventilation mechanism of a prefabricated cabin comprises a rectangular frame 1 and a ventilation box 2 fixedly mounted on the top of the rectangular frame 1, a ventilation and dust prevention mechanism is arranged between the rectangular frame 1 and the ventilation box 2, the ventilation and dust prevention mechanism comprises a ventilation fan 3 fixedly mounted inside the ventilation box 2, a rectangular plate 4 is fixedly mounted on the opposite side surfaces of the inner side of the rectangular frame 1, a first air guide cavity 5 and a second air guide cavity 6 are arranged inside the rectangular plate 4, an air outlet 7 connected to the outer surface of the rectangular plate 4 is arranged on the inner surface of the first air guide cavity 5, an anti-blocking net 11 is fixedly mounted on the inner surface of the air outlet 7, which is conducive to preventing the air outlet 7 from being blocked A dust suction port 8 connected to the outer surface of the rectangular plate 4 is provided on the inner surface of the second air guide chamber 6. The surface shape of the dust suction port 8 is strip-shaped, and the cross-sectional shape of the dust suction port 8 is conical, which is convenient for extracting air passing through the surface of the dust suction port 8. There are multiple air outlet holes 7, and the multiple air outlet holes 7 are evenly distributed on the surface of the rectangular plate 4. The air outlet holes 7 are inclined on the surface of the rectangular plate 4, and the inclination direction of the air outlet holes 7 is toward the side of the dust suction port 8. The first fan 9 and the second fan 10 are fixedly installed on the surface of the opposite side of the rectangular frame 1. The first fan 9 is connected to the first air guide chamber 5, and the second fan 10 is connected to the second air guide chamber 6.

[0023] A U-shaped groove 12 is inserted into the inner side of the ventilation box 2, and a filter mesh plate 13 is fixedly installed on the inner side of the ventilation box 2. Two mesh plates 14 are fixedly installed on the inner surface of the U-shaped groove 12, and a filter plate 15 is inserted between the two mesh plates 14 to facilitate filtering of the air entering the prefabricated cabin. A ventilation plate 16 located on the outside of the ventilation box 2 is fixedly installed on the surface of one end of the U-shaped groove to facilitate external air to enter the ventilation box 2.

[0024] It should be noted that the external shape and size of the U-shaped groove 12 in this embodiment are compatible with the shape and size of the interior of the ventilation box 2, which facilitates the insertion of the U-shaped groove 12 into the ventilation box 2, and the length and width of the ventilation plate 16 are greater than the height and width of the ventilation box 2.

[0025] It should be noted that the filter screen plate 13 in this embodiment has a porous structure, which can effectively block impurities such as particulate matter, dust, bacteria, etc., and keep the air entering the prefabricated cabin clean.

[0026] It should be noted that the filter plate 15 in this embodiment is made of glass fiber. The filter plate made of glass fiber has high strength, is not easy to deform or break, and has a long service life. The surface of the glass fiber filter plate is smooth, not easy to adhere to dirt, easy to clean, and convenient to maintain. At the same time, glass fiber is a non-toxic, odorless, harmless and environmentally friendly material that will not cause secondary pollution to the filtered liquid or gas.

[0027] It should be noted that a baffle is fixedly installed on the opposite side surface of the rectangular frame 1 in this embodiment, and the baffle is located between the first fan 9 and the second fan 10. The baffle can prevent the first fan 9 from sending dust and impurities discharged by the second fan 10 into the first air guide cavity 5.

[0028] The working principle of the above embodiment is:

[0029] When in use, the rectangular frame 1 and the ventilation box 2 are installed at the entrance of the prefabricated cabin, and one side of the ventilation plate 16 is facing the outer surface of the prefabricated cabin. When a person enters, the first fan 9 and the second fan 10 are started, and the first fan 9 blows air into the first air guide cavity 5. The wind in the first air guide cavity 5 is blown out through the air outlet 7 and acts on the body surface of the person entering, and the dust and impurities on the body surface of the person are blown away. At the same time, the second fan 10 draws out the air in the second air guide cavity 6, so that the air in the second air guide cavity 6 and the dust collector are A negative pressure state is formed inside the port 8, and the dust blown off by the first fan 9 is discharged to the outside of the prefabricated cabin through the second air guide cavity 6 and the dust suction port 8, thereby preventing people entering the prefabricated cabin from bringing dust into the prefabricated cabin. At the same time, the ventilation fan 3 draws outside air into the prefabricated cabin, and the air entering the prefabricated cabin is filtered through the filter plate 13 and the filter plate 15. When the filter plate 13 and the filter plate 15 need to be replaced or maintained, it is only necessary to pull the U-shaped groove 12 out of the ventilation box 2, which is convenient and quick to use.

[0030] The control method of the present invention is controlled by a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positive pressure ventilation mechanism for a prefabricated cabin, comprising a rectangular frame (1) and a ventilation box (2) fixedly mounted on the top of the rectangular frame (1), characterized in that: A ventilation and dust prevention mechanism is provided between the rectangular frame (1) and the ventilation box (2); The ventilation and dust prevention mechanism comprises a ventilation fan (3) fixedly mounted inside the ventilation box (2); a rectangular plate (4) is fixedly mounted on the opposite side surface of the inner side of the rectangular frame (1); a first air guide cavity (5) and a second air guide cavity (6) are provided inside the rectangular plate (4); an air outlet (7) connected to the outer surface of the rectangular plate (4) is provided on the inner surface of the first air guide cavity (5); a dust suction port (8) connected to the outer surface of the rectangular plate (4) is provided on the inner surface of the second air guide cavity (6); a first fan (9) and a second fan (10) are fixedly mounted on the opposite side surface of the rectangular frame (1); the first fan (9) is connected to the first air guide cavity (5); and the second fan (10) is connected to the second air guide cavity (6).

2. A positive pressure ventilation mechanism for a prefabricated cabin according to claim 1, characterized in that: The number of the air outlet holes (7) is multiple, and the multiple air outlet holes (7) are evenly distributed on the surface of the rectangular plate (4).

3. The positive pressure ventilation mechanism of a prefabricated cabin according to claim 1, characterized in that: The air outlet hole (7) is obliquely arranged on the surface of the rectangular plate (4), and the inclination direction of the air outlet hole (7) is toward the dust suction port (8).

4. The positive pressure ventilation mechanism of a prefabricated cabin according to claim 1, characterized in that: The surface shape of the dust suction port (8) is strip-shaped, and the cross-sectional shape of the dust suction port (8) is conical.

5. The positive pressure ventilation mechanism of a prefabricated cabin according to claim 1, characterized in that: An anti-blocking net (11) is fixedly mounted on the inner surface of the air outlet hole (7).

6. The positive pressure ventilation mechanism of a prefabricated cabin according to claim 1, characterized in that: A U-shaped groove (12) is inserted into the inner side of the ventilation box (2), a filter screen plate (13) is fixedly installed into the inner side of the ventilation box (2), two mesh plates (14) are fixedly installed on the inner surface of the U-shaped groove (12), and a filter plate (15) is inserted between the two mesh plates (14).

7. A positive pressure ventilation mechanism for a prefabricated cabin according to claim 6, characterized in that: A ventilation plate (16) located outside the ventilation box (2) is fixedly mounted on one end surface of the U-shaped groove (12).

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