Self-cleaning air intake and exhaust system

Abstract

The utility model relates to a self-cleaning air inlet and exhaust system which comprises an air pipe shell, an air inlet and an air outlet. The sand removing module is arranged on the side, close to the air valve, in the air pipe shell, and the sand removing module is located between the air valve and the main draught fan; the sand discharging channel is connected with the sand removing module; the sand discharging fan is arranged at the outlet of the sand discharging channel and is used for discharging the solid foreign matters outwards; wherein the air valve is opened, the main fan supplies air to the indoor space, external air enters the sand removal module under the action of the main fan, and the sand removal module removes solid foreign matter in the air; solid foreign matters are discharged from the sand discharging channel through the sand discharging fan, and the filtered air is supplied into a room by the main fan. The air purifier has the effects of supplying clean air indoors and exhausting indoor air at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning systems, in particular to a self-cleaning air intake and exhaust system. Background Art

[0002] Some factories require an air supply system to supply clean air to the room, and in some cases, the indoor air needs to be discharged to the outside in time. Therefore, these factories need to be equipped with both air supply and exhaust systems. The simultaneous configuration of air supply and exhaust systems will increase the construction cost of the factory.

[0003] The existing air supply system uses physical filters to achieve gas-solid separation. The separately set up exhaust system cannot clean the physical filters inside the air supply system. The exhaust system can only achieve the exhaust effect and cannot be linked with the air supply system.

[0004] In the equipment rooms of some factories in the northwest region, a large amount of air is often supplied to the room to dissipate heat in summer, while only a small amount of exhaust air is needed to solve the indoor heat exchange problem in winter. The existing technology uses an air supply system and an exhaust system that operate independently. The shortcomings of the existing technology are as follows: only one system is operated in summer or winter, while the other system is stagnant and wasteful.

[0005] In addition, when the internal environment of the factory is abnormal, such as when the temperature is too high or when toxic and harmful gases appear, it is necessary to increase the exhaust volume or temporarily exhaust the air. It is a bit wasteful to set up an exhaust system or increase the exhaust capacity separately. Therefore, there is an urgent need for a technical solution that can set up an exhaust duct in the original air supply system, which is convenient for temporary exhaust or increasing the exhaust volume, and does not require too much additional equipment, so as to improve the utilization rate of existing equipment and reduce investment and maintenance costs. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model discloses a self-cleaning air intake and exhaust system.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A self-cleaning air intake and exhaust system, comprising:

[0009] The air duct housing has an openable and closable air valve on one side and a main air blower inside;

[0010] A sand removal module is arranged in the air duct housing on one side close to the air valve, and the sand removal module is located between the air valve and the main fan;

[0011] A sand discharge channel connected to the sand removal module;

[0012] A sand discharge fan is provided at the outlet of the sand discharge channel and is used to discharge solid foreign matter outwards;

[0013] Among them, the air valve is opened, the main fan supplies air to the indoor space, and the outside air enters the sand removal module under the action of the main fan, and the sand removal module removes solid foreign matter in the air; the solid foreign matter is discharged from the sand removal channel through the sand removal fan, and the filtered air is supplied to the room by the main fan.

[0014] In one embodiment of the utility model, the sand removal module includes bent blades arranged in rows and a dust box; the bent portion of the bent blades faces the air valve; an air flow channel is formed between two adjacent rows of the bent blades; a preset gap is formed between two adjacent bent blades; the box opening of the dust box faces the opening of the bent blades, and the dust box is used to collect solid foreign matter.

[0015] In one embodiment of the present invention, the cross-sectional area of ​​the airflow channel gradually decreases from the starting end to the end end.

[0016] In one embodiment of the utility model, a connecting pipe is further included; the connecting pipe is arranged on a side of the air duct housing close to the main fan; the connecting pipe is used to connect the air duct housing and the indoor space.

[0017] In one embodiment of the utility model, an exhaust air valve is further included; the exhaust air valve is arranged on the side of the air duct housing and is close to the air inlet or outlet of the main fan.

[0018] In one embodiment of the utility model, it also includes an exhaust duct; one end of the exhaust duct is connected to the air duct shell, and the other end of the exhaust duct is connected to the sand discharge channel, and the air discharged from the exhaust duct passes through the sand discharge fan; wherein one end of the exhaust duct is arranged between the sand removal module and the main fan.

[0019] In one embodiment of the utility model, it also includes an exhaust duct; the exhaust duct is connected to the exhaust side of the air duct housing, and the exhaust duct is arranged on the main fan side.

[0020] In one embodiment of the utility model, the sand exhaust fan is connected to an exhaust pipe, the exhaust pipe is provided with a first channel and a second channel, and the inner diameter of the first channel is larger than the inner diameter of the second channel; the first channel is provided with a sand exhaust air valve.

[0021] In one embodiment of the present invention, the main fan is a forward and reverse rotating fan.

[0022] In one embodiment of the present invention, the sand discharge channel extends from a side of the air duct housing to a side away from the air duct housing.

[0023] The above technical solution of the utility model has at least the following advantages compared with the prior art:

[0024] The self-cleaning air intake and exhaust system of the utility model has the effects of supplying clean air indoors and exhausting indoor air at the same time.

[0025] When the self-cleaning air intake and exhaust system of the utility model is in the exhaust state, the air exhausted to the outside can also clean the sand and dust inside the sand exhaust channel that cannot be discharged in time.

[0026] The self-cleaning air intake and exhaust system of the utility model discharges indoor air from a sand discharge channel to the outside, and solid waste and gaseous waste share a channel.

[0027] The self-cleaning air intake and exhaust system of the utility model makes the exhaust speed of indoor air adjustable through the variable frequency sand exhaust fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the self-cleaning air intake and exhaust system in the utility model.

[0030] Figure 2 It is a top view of the sand removal module in the utility model.

[0031] Figure 3 It is a working principle diagram of the self-cleaning air intake and exhaust system (showing the exhaust air valve) in the utility model.

[0032] Figure 4 It is a working principle diagram of the self-cleaning air intake and exhaust system (showing the exhaust air valve and the exhaust air duct) in the utility model.

[0033] Figure 5 It is a working principle diagram of the self-cleaning air intake and exhaust system in the utility model (showing the exhaust air valve and the exhaust air duct, and the sand exhaust fan is a variable frequency fan).

[0034] Explanation of the reference numerals in the specification: 10, air duct housing; 20, air valve; 30, main fan; 40, sand removal module; 401, bent blades; 402, dust collection box; 50, sand discharge channel; 60, sand discharge fan; 70, connecting pipe; 80, exhaust air valve; 90, exhaust duct; 100, sand discharge air valve. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0036] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions of the reference drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0037] Embodiment 1

[0038] Reference Figure 1 As shown, this embodiment provides a self-cleaning air intake and exhaust system, including:

[0039] The air duct housing 10 has an openable and closable air valve 20 on one side and a main air blower 30 inside.

[0040] The sand removal module 40 is disposed in the air duct housing 10 at one side close to the air valve 20, and the sand removal module 40 is located between the air valve 20 and the main fan 30;

[0041] The sand discharge channel 50 is connected to the sand removal module 40;

[0042] The sand discharge fan 60 is arranged at the outlet of the sand discharge channel 50 and is used to discharge the solid foreign matter outwards;

[0043] Among them, the air valve 20 is opened, the main fan 30 supplies air to the indoor space, and the outside air enters the sand removal module 40 under the action of the main fan 30, and the sand removal module 40 removes solid foreign matter in the air; the solid foreign matter is discharged from the sand removal channel 50 through the sand removal fan 60, and the filtered air is supplied to the room by the main fan 30.

[0044] This embodiment provides a self-cleaning air intake and exhaust system, which can achieve an air supply effect indoors, and the air introduced into the room is clean air.

[0045] In this embodiment, the main fan 30 is a forward and reverse rotating fan, so that according to different scene requirements, the forward rotation of the main fan 30 can introduce fresh air into the room, and the reverse rotation of the main fan 30 can discharge the dirty air in the room.

[0046] In this embodiment, if Figure 2As shown, the sand removal module 40 includes bent blades 401 arranged in a row and a dust box 402; the bent portion of the bent blades 401 faces the air valve 20; an air flow channel is formed between two adjacent rows of bent blades 401; a preset gap is formed between two adjacent bent blades 401; the box opening of the dust box 402 faces the opening of the bent blades 401, and the dust box 402 is used to collect solid foreign matter. For ease of understanding, a local coordinate system is established, with the direction of the long side of the air duct housing 10 as the x-axis direction, and the direction of the wide side of the air duct housing 10 as the y-axis direction, as shown in FIG. Figure 2 As shown, the opening of the bent blade 401 faces the positive direction of the x-axis, and the box opening of the dust collecting box 402 faces the negative direction of the x-axis.

[0047] The sand and dust in the air are blocked between two rows of bent blades 401 by means of rows and intervals of bent blades 401, and the sand and dust are then concentrated in the dust collecting box 402 with the help of airflow, and finally the sand and dust are discharged outward by the sand exhaust fan 60, thereby achieving gas-solid separation in the air. The sand and dust removed by the sand removal module 40 can be discharged to a designated place by the sand exhaust fan 60, without the need for manual cleaning of the sand and dust, thereby achieving the effect of self-cleaning the sand and dust.

[0048] Furthermore, the cross-sectional area of ​​the airflow channel gradually decreases from the starting end to the end, the airflow velocity gradually increases, and the pressure gradually decreases.

[0049] In this embodiment, the sand discharge channel 50 extends from the side of the air duct housing 10 to the side away from the air duct housing 10. Specifically, the inner diameter of the entrance of the sand discharge channel 50 is larger than the inner diameter of the exit, and the general shape of the sand discharge channel 50 is a cone. The entrance of the sand discharge channel 50 is larger, and the speed of the airflow entering is relatively low, which reduces the turbulence and energy loss of the airflow. As the channel gradually narrows, the airflow speed gradually increases, which improves the carrying capacity of solid foreign matter and helps to take away the solid foreign matter more effectively.

[0050] Under the action of the sand exhaust fan 60, sand and dust will not accumulate inside the sand removal module 40, thus avoiding the problem of frequent cleaning by operators.

[0051] In this embodiment, the self-cleaning air intake and exhaust system further includes a connecting pipe 70 ; the connecting pipe 70 is disposed on the side of the air duct housing 10 close to the main fan 30 ; the connecting pipe 70 is used to connect the air duct housing 10 and the indoor space.

[0052] The working principle of this embodiment is as follows:

[0053] The air valve 20 is opened, and the main fan 30 supplies air to the indoor space. The outside air enters the sand removal module 40 under the action of the main fan 30, and the sand removal module 40 removes solid foreign matter in the air; the solid foreign matter is discharged from the sand removal channel 50 through the sand removal fan 60, and the filtered air is supplied to the room by the main fan 30, thereby completing the delivery of clean air.

[0054] Embodiment 2

[0055] Reference Figure 3 As shown, this embodiment provides a self-cleaning air intake and exhaust system, which is different from the first embodiment in that the self-cleaning air intake and exhaust system further includes an exhaust air valve 80. The exhaust air valve 80 is arranged on the side of the air duct housing 10 and is close to the air inlet or outlet of the main fan 30. When the main fan 30 continues to reverse, the indoor air will be discharged outward through the exhaust air valve 80 and the sand discharge channel 50.

[0056] It should be noted that this embodiment is applicable to the situation where a large discharge volume is required indoors and no toxic gas is generated indoors.

[0057] In addition, when the environmental conditions require a smaller exhaust volume, the indoor air can be exhausted only through the sand exhaust fan 60. At this time, the air valve 20, the main fan 30 and the exhaust air valve 80 are all closed.

[0058] Embodiment 3

[0059] Reference Figure 4 As shown, this embodiment provides a self-cleaning air intake and exhaust system, which is different from the first embodiment in that the self-cleaning air intake and exhaust system includes an exhaust air valve 80 and an exhaust air duct 90, and the exhaust air valve 80 is arranged at the exhaust air duct 90, and the exhaust air valve 80 can adjust the opening and closing state of the exhaust air duct 90. One end of the exhaust air duct 90 is connected to the air duct housing 10, and the other end of the exhaust air duct 90 is connected to the sand discharge channel 50, and the air discharged from the exhaust air duct 90 passes through the sand discharge fan 60; wherein, one end of the exhaust air duct 90 is arranged between the sand removal module 40 and the main fan 30.

[0060] The working principle of this embodiment is as follows:

[0061] When the indoor ambient temperature is too high or smoke appears, it is necessary to make the indoor pressure negative. The self-cleaning air intake and exhaust system can start the exhaust mode, and the main fan 30 is continuously reversed, and the air valve 20 of the air duct housing 10 is closed, and then the exhaust air valve 80 is opened, the exhaust duct 90 is in a normal conduction state, and the sand exhaust fan 60 continues to work. The indoor air is sucked into the air duct housing 10 under the action of the reversal of the main fan 30. Since the air valve of the air duct housing 10 is closed, the indoor air will not pass through the entire air duct housing 10, but will be discharged to the outside through the sand discharge channel 50 and the exhaust duct 90, thereby realizing the discharge of indoor gas. The inner diameter of the exhaust duct 90 is smaller than the duct housing 10. Since the air valve 20 of the duct housing 10 is closed and the exhaust air volume of the main fan 30 does not change much, the wind speed of the gas discharged from the sand discharge fan 60 is greater than the wind speed when the sand discharge fan 60 is working normally. At this time, the gas can blow away the solid particles in the sand discharge channel 50 that are not discharged due to insufficient wind speed, thereby achieving the effect of cleaning the sand discharge channel 50 and having the effect of self-cleaning the sand discharge channel 50.

[0062] Furthermore, an exhaust pipe is connected, and a first channel (not shown in the figure) and a second channel (not shown in the figure) are provided in the exhaust pipe, and the inner diameter of the first channel is larger than the inner diameter of the second channel; the first channel is provided with a sand exhaust valve 100. When the sand exhaust fan 60 is working normally, only the second channel is in an open state, and the sand exhaust valve 100 on the first channel is closed, so that the sand and dust in the sand removal module 40 can be discharged outward at a higher wind speed to avoid sand and dust accumulation. When the main fan 30 is reversed, the sand exhaust valve 100 of the first channel is opened, and the exhaust area of ​​the exhaust pipe 90 of the sand exhaust fan 60 will increase, and the sand exhaust fan 60 can adapt to large air volume exhaust, thereby ensuring stable discharge of indoor air.

[0063] Embodiment 4

[0064] Reference Figure 5 As shown, this embodiment provides a self-cleaning air intake and exhaust system, which is different from the third embodiment in that the exhaust duct 90 is connected to the exhaust side of the air duct housing 10, and the exhaust duct 90 is arranged on the side of the main fan 30. At this time, the main fan 30 does not need to be reversed.

[0065] The working principle of this embodiment is as follows:

[0066] When the main fan 30 is used to supply air to the room, the sand removal fan 60 operates at a lower operating frequency, and only the second channel is connected, so that the wind speed of the air discharged by the sand removal fan 60 is relatively high, ensuring that sand and dust can be stably discharged from the sand removal module 40.

[0067] If the indoor environment needs to be exhausted, the main fan 30 stops working, and the air valve 20 of the air duct housing 10 is closed, the exhaust air valve 80 and the sand exhaust air valve 100 are opened, and then the operating frequency of the sand exhaust fan 60 is increased. The indoor gas can be discharged to the outside only through the sand exhaust fan 60, thereby achieving the purpose of exhausting the indoor air. Since the operating frequency of the sand exhaust fan 60 is increased, the sand exhaust channel 50 can also achieve a self-cleaning effect while exhausting the indoor air.

[0068] It should be noted that, in the present embodiment, the sand exhaust air valve 100 is opened to increase the air volume exhausted by the sand exhaust fan 60 .

[0069] In the first to fourth embodiments, the air valve 20, the air exhaust valve 80 and the sand exhaust valve 100 are all electric closed valves and do not need to be opened manually.

[0070] From the above, it can be seen that the self-cleaning air intake and exhaust system provided by the utility model can not only realize the air supply effect for the indoor room, but also can pump the indoor air to the outside, and when the indoor air is pumped to the outside, the sand and dust inside the sand discharge channel 50 can also be cleaned to achieve the self-cleaning effect. A single system can achieve two effects, and the exhaust system and the air supply system do not completely share the same channel. The exhaust gas discharged from the indoor to the outside can be discharged to a designated treatment area, ensuring that the exhaust gas generated indoors will not be directly discharged to the outdoor environment.

[0071] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0072] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A self-cleaning air intake and exhaust system, characterized in that: include: An air duct housing (10) is provided with an openable and closable air valve (20) on one side thereof, and a main air blower (30) is provided inside the housing; A sand removal module (40) is arranged in the air duct housing (10) on a side close to the air valve (20), and the sand removal module (40) is located between the air valve (20) and the main fan (30); A sand removal channel (50) connected to the sand removal module (40); A sand discharge fan (60) is arranged at the outlet of the sand discharge channel (50) and is used to discharge solid foreign matter outwards; The air valve (20) is opened, the main fan (30) supplies air to the indoor space, and the outside air enters the sand removal module (40) under the action of the main fan (30), and the sand removal module (40) removes solid foreign matter in the air; the solid foreign matter is discharged from the sand removal channel (50) through the sand removal fan (60), and the filtered air is supplied to the indoor space by the main fan (30).

2. The self-cleaning air intake and exhaust system according to claim 1, characterized in that: The sand removal module (40) comprises bent blades (401) arranged in a row and a dust collecting box (402); the bent portion of the bent blades (401) faces the air valve (20); an air flow channel is formed between two adjacent rows of the bent blades (401); a preset gap is formed between two adjacent bent blades (401); the box opening of the dust collecting box (402) faces the opening of the bent blades (401), and the dust collecting box (402) is used to collect solid foreign matter.

3. The self-cleaning air intake and exhaust system according to claim 2, characterized in that: The cross-sectional area of ​​the airflow channel gradually decreases from the starting end to the end end.

4. The self-cleaning air intake and exhaust system according to claim 1, characterized in that: It also comprises a connecting pipe (70); the connecting pipe (70) is arranged on a side of the air duct housing (10) close to the main fan (30); the connecting pipe (70) is used to connect the air duct housing (10) and the indoor space.

5. The self-cleaning air intake and exhaust system according to claim 1, characterized in that: It also includes an exhaust air valve (80); the exhaust air valve (80) is arranged on the side of the air duct housing (10) and is close to the air inlet or outlet of the main fan (30).

6. The self-cleaning air intake and exhaust system according to claim 5, characterized in that: It also includes an exhaust duct (90); one end of the exhaust duct (90) is connected to the air duct housing (10), and the other end of the exhaust duct (90) is connected to the sand removal channel (50), and the air discharged from the exhaust duct (90) passes through the sand removal fan (60); wherein one end of the exhaust duct (90) is arranged between the sand removal module (40) and the main fan (30).

7. The self-cleaning air intake and exhaust system according to claim 5, characterized in that: It also includes an exhaust duct (90); the exhaust duct (90) is connected to the exhaust side of the air duct housing (10), and the exhaust duct (90) is arranged on the main fan (30) side.

8. The self-cleaning air intake and exhaust system according to claim 5, characterized in that: The sand-discharging fan (60) is connected to an exhaust pipe, in which a first channel and a second channel are provided, and the inner diameter of the first channel is larger than the inner diameter of the second channel; the first channel is provided with a sand-discharging air valve (100).

9. The self-cleaning air intake and exhaust system according to claim 1, characterized in that: The main fan (30) is a forward and reverse rotating fan.

10. The self-cleaning air intake and exhaust system according to claim 1, characterized in that: The sand discharge channel (50) extends from a side surface of the air duct housing (10) to a side surface away from the air duct housing (10).

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