Cab positive pressure system

Abstract

The utility model discloses a cab positive pressure system, which relates to the technical field of positive pressure systems, and comprises an air guide shell, two symmetrical fans are arranged on the surface of the air guide shell, the fans are fixedly connected with an electric control mechanism, and a filter mechanism is inserted into the bottom of the air guide shell. The air guiding shell is fixedly connected with a cab ceiling through a connecting mechanism, and a circulating ventilation mechanism is arranged at the position, corresponding to the air guiding shell, of the outer side of the cab ceiling and the surface of the bottom of the cab ceiling. Therefore, airflow is pressed out from the closed cab, airflow freshness in the cab is guaranteed, internal peculiar smell is eliminated, dust entering the cab is reduced, and the comfort level of a driver and the working efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positive pressure systems, in particular to a cab positive pressure system. Background Art

[0002] With the booming development of the automotive industry and increasingly fierce competition in the industry, people have higher requirements for the driving environment inside the vehicle cab.

[0003] During the driving of the vehicle, dust, haze and other pollutants often enter the cab. During the driving of the vehicle, the passengers inside the vehicle cannot normally clean the pollutants. The dust, haze and other pollutants entering the cab will not only affect the normal driving of the driver, but also cause harm to human health if not processed for a long time. The existing cab positive pressure systems are large in volume and relatively complex in structure, and are not convenient for installation inside the cab.

[0004] Based on this, a cab positive pressure system is now provided, which can eliminate the disadvantages of the existing devices. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cab positive pressure system to solve the problems in the background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A cab positive pressure system includes a wind guiding housing. Two symmetric fans are arranged on the surface of the wind guiding housing. The fans are fixedly connected to an electric control mechanism. A filtering mechanism is inserted at the bottom of the wind guiding housing. The wind guiding housing is fixedly connected to the cab ceiling through a connecting mechanism. A circulating ventilation mechanism is arranged at the positions corresponding to the wind guiding housing on the inner and outer sides of the cab ceiling.

[0008] On the basis of the above technical solutions, the utility model also provides the following optional technical solutions:

[0009] In an optional solution: The fan is a turbo blower.

[0010] In an optional solution: The circulating ventilation mechanism includes an inner circulation air outlet and an outer circulation air outlet. An inner circulation air outlet is arranged on the inner surface of the cab ceiling corresponding to the bottom of the wind guiding housing. An outer circulation air outlet is arranged on the outer surface of the cab ceiling.

[0011] In an optional solution: The electric control mechanism includes a wire harness, a ventilation switch and a power supply plug. A ventilation switch is arranged on the inner surface of the cab ceiling. The positive pole of the wire harness is electrically connected to the fan and the ventilation switch. The negative pole of the wire harness takes power from the cab electric harness through the power supply plug.

[0012] In an alternative solution: The wire harness is arranged inside the cab roof.

[0013] In an alternative solution: The connecting mechanism includes a screw hole, a connecting plate and a connecting block. Three connecting blocks are evenly distributed on the inner wall of the cab roof corresponding to the back of the air guide housing. A connecting plate corresponding to the connecting block is provided on the back of the air guide housing. The air guide housing is fixedly connected to the connecting block through the connecting plate, and the front of the air guide housing is fixedly connected to the screw hole through a bolt.

[0014] In an alternative solution: The filtering mechanism includes an air filter box and an air filter. The air filter box is inserted into the air guide housing, and an air filter is provided inside the air filter box.

[0015] In an alternative solution: The air filter box is arranged on the surface of the air inlet of the external circulation air outlet.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By setting the connecting mechanism, the device is installed inside the cab roof without changing the original structure, which is convenient and fast while saving costs, and can be retrofitted on models without a positive pressure ventilation system.

[0018] 2. By setting the fan, fresh air is conveyed into the cab through the fan during operation, generating a weak positive pressure inside the cab, so that the air flow is pressed out from the sealed cab, reducing the dust entering the cab and improving the driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the present utility model.

[0020] Figure 2 It is a schematic structural diagram of the circulation mechanism of the present utility model.

[0021] Figure 3 It is a schematic structural diagram of the electric control mechanism of the present utility model.

[0022] Figure 4 It is a schematic structural diagram of the top of the present utility model.

[0023] Annotation of reference numerals in the drawings: 1. Air guide housing; 2. Fan; 3. Air filter box; 4. Air filter; 5. Wire harness; 6. Ventilation switch; 7. Internal circulation air outlet; 8. External circulation air outlet; 9. Cab roof; 10. Screw hole; 11. Connecting plate; 12. Connecting block; 13. Power supply plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] In one embodiment, as Figure 1 shown, a positive pressure system for a cab includes a wind guiding housing 1. Two symmetrical fans 2 are provided on the surface of the wind guiding housing 1. The fans 2 are fixedly connected to an electric control mechanism. A filtering mechanism is inserted at the bottom of the wind guiding housing 1. The wind guiding housing 1 is fixedly connected to the cab roof 9 through a connecting mechanism. A circulating ventilation mechanism is provided at the positions on the outer side and the bottom surface of the cab roof 9 corresponding to the wind guiding housing 1. During operation, the fans 2 drive the indoor and outdoor air to circulate through the circulating ventilation mechanism. During the circulation process, the filtering mechanism filters the air, and finally fresh air is introduced into the cab, thereby reducing pollutants in the cab and improving the comfort of the driver.

[0026] In one embodiment, as Figure 1 shown, the fan 2 is a turbo blower, which has the advantages of large air volume and low noise. When in use, fresh air is conveyed into the cab through the turbo blower, generating a weak positive pressure inside the cab, so that the air flow is pressed out from the sealed cab to reduce the dust entering the cab.

[0027] In one embodiment, as Figure 2 and Figure 4 shown, the circulating ventilation mechanism includes an inner circulation air outlet 7 and an outer circulation air outlet 8. The inner circulation air outlet 7 is provided on the bottom surface of the cab roof 9 corresponding to the bottom position of the wind guiding housing 1. The outer circulation air outlet 8 is provided on the outer surface of the cab roof 9 corresponding to the back position of the wind guiding housing 1. During operation, the fresh air is extracted into the interior of the cab roof 9 through the outer circulation air outlet 7 by the fan 2 and then introduced into the cab through the inner circulation air outlet 8 to ensure fresh air flow inside the cab and effectively eliminate internal odors.

[0028] In one embodiment, as Figure 3 shown, the electric control mechanism includes a wire harness 5, a ventilation switch 6 and a power supply plug 13. The ventilation switch 6 is provided on the bottom surface of the cab roof 9. The positive pole of the wire harness 5 is electrically connected to the fan 2 and the ventilation switch 6. The negative pole of the wire harness 5 takes power from the cab electric beam through the power supply plug 13. When in use, the system is turned on or off through the ventilation switch 6, and the wire harness 5 inside the cab roof 9 will not affect the vehicle occupants during operation.

[0029] In one embodiment, as Figure 1As shown in the figure, the connecting mechanism includes a screw hole 10, a connecting plate 11 and a connecting block 12. Three connecting blocks 12 are evenly distributed on the inner wall of the cab roof 9 corresponding to the back position of the air guide housing 1. The back of the air guide housing 1 is provided with a connecting plate 11 corresponding to the connecting block 12. The air guide housing 1 is fixedly connected to the connecting block 12 through the connecting plate 11. The front of the air guide housing 1 is fixedly connected to the screw hole 10 through a bolt.

[0030] In one embodiment, as Figure 1 shown, the filtering mechanism includes an air filter box 3 and an air filter 4. The air filter box 3 is inserted into the air guide housing 1. An air filter 4 is provided in the air filter box 3. The air filter box 3 is arranged on the surface of the air inlet of the external circulation air outlet 8.

[0031] The above embodiment discloses a positive pressure system for a cab. During installation, open the air conditioner maintenance opening at the top of the cab roof 9, assemble the air filter box 3 equipped with the air filter 4 onto the air inlet of the external circulation air outlet 8, press the air guide housing 1 onto the air filter box 3, find a suitable position on the bottom of the cab roof 9 to drill a hole for installing the ventilation switch 6, connect the wire harness 5 to the fan 2 and the ventilation switch 6, take power from the cab wire harness through the reserved power taking port, close the air conditioner maintenance opening after connection, turn on the switch, and the fan 2 starts to work. Fresh air is extracted into the cab roof 9 through the external circulation air outlet 8 and passes through the air filter 4, and the fresh air is introduced into the cab through the internal circulation air outlet 7.

[0032] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A positive pressure system for a cab, comprising an air guiding housing (1), characterized in that, The surface of the air guiding housing (1) is provided with two symmetrically arranged fans (2), the fans (2) are fixedly connected to an electric control mechanism, a filtering mechanism is inserted at the bottom of the air guiding housing (1), the air guiding housing (1) is fixedly connected to the cab ceiling (9) through a connecting mechanism, and a circulating ventilation mechanism is arranged at the position on the outer side and the bottom surface of the cab ceiling (9) corresponding to the air guiding housing (1).

2. The positive pressure system for a cab according to claim 1, characterized in that, The fan (2) is a turbo blower.

3. The positive pressure system for a cab according to claim 1, characterized in that, The circulating ventilation mechanism includes an internal circulation air inlet (7) and an external circulation air inlet (8). An internal circulation air inlet (7) is arranged at the position on the bottom surface of the cab ceiling (9) corresponding to the bottom of the air guiding housing (1), and an external circulation air inlet (8) is arranged at the position on the outer surface of the cab ceiling (9) corresponding to the back surface of the air guiding housing (1).

4. The positive pressure system for the cab according to claim 1, wherein, The electric control mechanism includes a wire harness (5), a ventilation switch (6) and a power supply plug (13). A ventilation switch (6) is arranged on the bottom surface of the cab ceiling (9). The positive electrode of the wire harness (5) is electrically connected to the fan (2) and the ventilation switch (6), and the negative electrode of the wire harness (5) takes power from the cab electric beam through the power supply plug (13).

5. The positive pressure system for a cab according to claim 4, characterized in that, The wire harness (5) is arranged inside the cab ceiling (9).

6. The positive pressure system for the cab according to claim 1, characterized in that, The connecting mechanism includes a screw hole (10), a connecting plate (11) and a connecting block (12). Three connecting blocks (12) are evenly distributed on the inner wall of the cab ceiling (9) corresponding to the back surface of the air guiding housing (1). A connecting plate (11) corresponding to the connecting block (12) is arranged on the back surface of the air guiding housing (1). The air guiding housing (1) is fixedly connected to the connecting block (12) through the connecting plate (11), and the front surface of the air guiding housing (1) is fixedly connected to the screw hole (10) through a bolt.

7. The positive pressure system for a cab according to claim 1, characterized in that, The filtering mechanism includes an air filter box (3) and an air filter (4). The air filter box (3) is inserted into the air guiding housing (1), and an air filter (4) is arranged inside the air filter box (3).

8. A positive pressure system for a cab according to claim 7, characterized in that, The air filter box (3) is arranged on the air inlet surface of the external circulation air inlet (8).

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