Self-cleaning ventilation equipment suitable for fresh air system

Abstract

The invention discloses self-cleaning ventilation equipment suitable for a fresh air system, and belongs to the technical field of ventilation equipment, the self-cleaning ventilation equipment comprises a ventilation pipeline, one end of the ventilation pipeline is communicated with the outdoor, the other end of the ventilation pipeline is communicated with the fresh air system, two electric air valves are arranged in the ventilation pipeline, and a trapezoidal cylinder is arranged at the bottom of the ventilation pipeline between the two electric air valves; the bottom of the trapezoidal cylinder is provided with a drain outlet, and the top of the ventilation pipeline between the two electric air valves is provided with a water spraying device; a filter screen and a driving device for driving the filter screen to rotate are arranged in the ventilating pipeline between the two electric air valves; according to the invention, full-automatic cleaning of the filter screen is realized, the working efficiency is effectively improved, and the labor intensity and the labor cost are reduced; moreover, the time for cleaning and maintaining the filter screen each time is relatively short, so that the influence on the work of the fresh air system is relatively small, and the fresh air demand of a user and the indoor air quality are ensured.

Description

Technical Field

[0001] The invention relates to a self-cleaning ventilation device suitable for a fresh air system, belonging to the technical field of ventilation equipment. Background Art

[0002] The fresh air system is an efficient indoor air treatment system that provides fresh air to the room through air supply and exhaust, and removes dirty air and harmful gases from the room. The fresh air system is usually equipped with a high-efficiency filtering device that can effectively filter out harmful substances in the outdoor air, ensuring that the air entering the room is clean. It can effectively improve indoor air quality, reduce indoor air pollution, and reduce the risk of respiratory diseases.

[0003] The fresh air system is usually also equipped with a filter at the outdoor air inlet to filter out foreign matter such as lint and dead leaves in the outdoor air, to prevent lint, dead leaves and other foreign matter from entering the fresh air system and to avoid affecting the filtering device inside the fresh air system; in windy weather during the transition season, there are more foreign matter in the outdoor air, in spring, there are relatively more lint in the outdoor air, and in autumn, there are relatively more dead leaves in the outdoor air; when the fresh air system is working, these foreign matter will be blocked on the outside by the filter, but as time goes by, the filter will be covered by these foreign matter, resulting in reduced air intake efficiency and effect, affecting the normal operation of the fresh air system, therefore, the filter needs to be cleaned and maintained regularly, the current practice is to manually remove the filter for cleaning, and then reinstall it after cleaning, which has low work efficiency and high labor costs; moreover, in the transition season, the filter needs to be cleaned and maintained relatively more frequently, resulting in high labor intensity and a long time for cleaning and maintenance, which delays the normal operation of the fresh air system. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a self-cleaning ventilation device suitable for a fresh air system.

[0005] The technical solution adopted in the present invention is as follows: A self-cleaning ventilation device suitable for a fresh air system includes a ventilation duct, one end of the ventilation duct being connected to the outdoors and the other end being connected to the fresh air system; two electric air valves being provided inside the ventilation duct; a trapezoidal cylinder being provided at the bottom of the ventilation duct between the two electric air valves; the trapezoidal cylinder and the ventilation duct being connected to each other; a sewage outlet being provided at the bottom of the trapezoidal cylinder; and a water spraying device being provided at the top of the ventilation duct between the two electric air valves; a filter screen and a driving device for driving the filter screen to rotate being provided inside the ventilation duct between the two electric air valves; In the ventilation working state, the two electric air valves are opened, and the filter is located inside the ventilation duct to filter the outdoor air; In the cleaning working state, the two electric air valves are closed, the filter is located inside the trapezoidal cylinder, and the water spray device reversely flushes the filter.

[0006] As a preferred embodiment of the present invention, the driving device drives the filter to rotate in an angle range of 0-90 degrees; when the filter is located inside the ventilation duct, the filter is arranged vertically at 90 degrees, and when the filter is located inside the trapezoidal cylinder, the filter is arranged horizontally at 0 degrees.

[0007] As a preferred embodiment of the present invention, the driving device is linked to control the two electric air valves. When the driving device drives the filter to rotate to a horizontal arrangement of 0 degrees, the two electric air valves are linked to control closing. When the driving device drives the filter to rotate to a vertical arrangement of 90 degrees, the two electric air valves are linked to control opening.

[0008] As a preferred embodiment of the present invention, the driving device is an outer rotor motor, the two ends of the stator shaft of the outer rotor motor are respectively connected to the front and rear side walls of the trapezoidal cylinder, and the bottom of the filter screen is connected to the rotor drum of the outer rotor motor.

[0009] As a preferred embodiment of the present invention, a rectangular limiting ring is provided inside the ventilation duct. When the filter screen is located inside the ventilation duct, the inner side edge of the filter screen contacts the rectangular limiting ring. The rectangular limiting ring limits the filter screen and at the same time blocks the gap between the filter screen and the inner wall of the ventilation duct.

[0010] As a preferred embodiment of the present invention, a sealing rubber pad is provided on the surface of the rectangular limiting ring facing the filter screen to improve the sealing between the filter screen and the rectangular limiting ring, thereby preventing outdoor air from bypassing the filter screen.

[0011] As a preferred embodiment of the present invention, the water spraying device includes a water spraying head, and the water spraying head is connected to an external water supply pipeline.

[0012] Furthermore, in order to improve the backwashing effect of the filter, the water spraying device also includes a linear drive device and a water supply pipe. The water supply pipe vertically passes through the top of the ventilation duct and is slidably connected to the ventilation duct. The water spray head is installed at the end of the water supply pipe located inside the ventilation duct. The linear drive device is vertically arranged on the outside of the top of the ventilation duct and close to the water supply pipe. The water supply pipe body located outside the ventilation duct is connected to the linear drive device, and the linear drive device is used to drive the water supply pipe to move in the vertical direction.

[0013] Furthermore, the water supply pipe is slidably connected to the ventilation duct via a linear bearing, thereby ensuring the stability of the water supply pipe when displaced in the vertical direction, while avoiding the formation of a gap between the water supply pipe and the ventilation duct, thereby improving the airtightness of the ventilation duct.

[0014] As a preferred embodiment of the present invention, the sewage outlet is connected to an external sewage pipe, and an electric sewage valve is provided at the sewage outlet.

[0015] The present invention is beneficial in that: During the process of cleaning the filter, there is no need to manually remove it for cleaning and then reinstall it after cleaning, which realizes fully automatic cleaning of the filter, effectively improves work efficiency, reduces labor intensity and labor costs; moreover, the time taken for each cleaning and maintenance of the filter is relatively short, and the impact on the operation of the fresh air system is relatively small, ensuring the user's fresh air needs and indoor air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the first embodiment of the present invention in a ventilation working state; Figure 2 is a schematic diagram of the first embodiment of the present invention in a cleaning working state; Figure 3 This is a schematic diagram of the second embodiment of the present invention in the cleaning working state. Figure 1 ; Figure 4 This is a schematic diagram of the second embodiment of the present invention in the cleaning working state. Figure 2 .

[0017] The meaning of the reference numerals in the figures: 1- ventilation duct, 2- electric air valve, 3- trapezoidal cylinder, 4- sewage outlet, 5- electric sewage valve; 6-Sprinkler head, 7-Filter screen, 8-External rotor motor, 9-Rectangular limiting ring, 10-Water supply pipe; 11-Linear motor module, 12-Slide table. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] like Figure 1 and Figure 2As shown, this embodiment is a self-cleaning ventilation device suitable for a fresh air system, comprising a ventilation duct 1, one end of the ventilation duct 1 is connected to the outdoors, and the other end is connected to the fresh air system, two electric air valves 2 are arranged inside the ventilation duct 1, a trapezoidal cylinder 3 is arranged at the bottom of the ventilation duct 1 between the two electric air valves 2, the trapezoidal cylinder 3 and the ventilation duct 1 are connected to each other, a sewage outlet 4 is arranged at the bottom of the trapezoidal cylinder 3, the sewage outlet 4 is connected to the external sewage pipe, and an electric sewage valve 5 is arranged at the sewage outlet 4; the size of the sewage outlet 4 is designed to be large to ensure smooth drainage and the discharge of foreign matter such as dead leaves; a water spraying device is arranged on the top of the ventilation duct 1 between the two electric air valves 2, the water spraying device includes a water spraying head 6, and the water spraying head 6 is connected to the external water supply pipe; a filter screen 7 and a driving device for driving the filter screen 7 to rotate are arranged inside the ventilation duct 1 between the two electric air valves 2; in the ventilation working state, the two electric air valves 2 are opened, the filter screen 7 is located inside the ventilation duct 1, and the filter screen 7 filters the outdoor air. Figure 1 In the cleaning working state, the two electric air valves 2 are closed, the filter 7 is located inside the trapezoidal cylinder 3, and the water spray device reversely flushes the filter 7, as shown. Figure 2 shown.

[0021] In this embodiment, the driving device drives the filter screen 7 to rotate in an angle range of 0-90 degrees; when the filter screen 7 is located inside the ventilation duct 1, the filter screen 7 is arranged vertically at 90 degrees, and when the filter screen 7 is located inside the trapezoidal cylinder 3, the filter screen 7 is arranged horizontally at 0 degrees.

[0022] In this embodiment, the driving device is linked to the two electric air valves 2 for control. When the driving device drives the filter screen 7 to rotate to a horizontal arrangement of 0 degrees, the two electric air valves 2 are linked to be controlled to be closed. When the driving device drives the filter screen 7 to rotate to a vertical arrangement of 90 degrees, the two electric air valves 2 are linked to be controlled to be open.

[0023] In this embodiment, the driving device adopts an outer rotor motor 8 , the two ends of the stator shaft of the outer rotor motor 8 are respectively connected to the front and rear side walls of the trapezoidal cylinder 3 , and the bottom of the filter screen 7 is connected to the rotor drum of the outer rotor motor 8 .

[0024] In this embodiment, a rectangular limiting ring 9 is provided inside the ventilation duct 1. When the filter screen 7 is located inside the ventilation duct 1, the inner side edge of the filter screen 7 contacts the rectangular limiting ring 9; the rectangular limiting ring 9 limits the filter screen 7 and at the same time blocks the gap between the filter screen 7 and the inner wall of the ventilation duct 1; a sealing rubber pad is provided on the surface of the rectangular limiting ring 9 facing the filter screen 7; the sealing between the filter screen 7 and the rectangular limiting ring 9 is improved to prevent outdoor air from bypassing the filter screen 7.

[0025] In this embodiment, when the ventilation is in normal working state, the water spray head 6 stops spraying water, the electric drain valve 5 is closed, the two electric air valves 2 are opened, and the filter screen 7 is located inside the ventilation duct 1. After the fresh air system starts working, the outdoor air is filtered by the filter screen 7 and then enters the fresh air system. Figure 1 shown.

[0026] When the filter 7 needs to be cleaned, the embodiment enters the cleaning working state, the fresh air system stops working, the outer rotor motor 8 drives the filter 7 to rotate outward to be arranged horizontally at 0 degrees, and controls the two electric air valves 2 to close. At this time, the filter 7 is located inside the trapezoidal cylinder 3, with the outer side of the filter 7 facing downward and the inner side facing upward; the electric drain valve 5 is opened, and the water spray head 6 starts to spray water to achieve reverse flushing of the filter 7. Figure 2 As shown, foreign matter such as lint and dead leaves attached to the outer side of the filter screen 7 is separated from the filter screen 7 and falls into the trapezoidal cylinder 3 along with the water flow, and is finally discharged through the sewage outlet 4, completing the cleaning process of the filter screen 7.

[0027] After the cleaning work of the filter 7 is completed, the normal ventilation working state is restored, the sprinkler head 6 stops spraying water, the electric drain valve 5 is closed, and the outer rotor motor 8 drives the filter 7 to rotate inward 90 degrees to be arranged vertically, and the two electric air valves 2 are controlled to open. At this time, the filter 7 is restored to the inside of the ventilation duct 1, and the fresh air system restarts.

[0028] During the process of cleaning the filter in this embodiment, there is no need to manually remove it for cleaning and then reinstall it after cleaning, thereby realizing fully automatic cleaning of the filter, effectively improving work efficiency, and reducing manual labor intensity and labor costs; moreover, the time taken for each cleaning and maintenance of the filter is relatively short, and the impact on the operation of the fresh air system is relatively small, thereby ensuring the user's fresh air needs and indoor air quality.

[0029] Example 2

[0030] like Figure 3 and Figure 4 As shown, this embodiment is a self-cleaning ventilation device suitable for a fresh air system. The structure of this embodiment is similar to that of the first embodiment, and the only difference is that: In this embodiment, the water spraying device also includes a linear drive device and a water supply pipe 10. The water supply pipe 10 vertically passes through the top of the ventilation duct 1 and is slidably connected to the ventilation duct 1. The water spray head 6 is installed at the end of the water supply pipe 10 located inside the ventilation duct 1. The linear drive device is vertically arranged on the outside of the top of the ventilation duct 1 and close to the water supply pipe 10. The water supply pipe 10 body located outside the ventilation duct 1 is connected to the linear drive device. The linear drive device is used to drive the water supply pipe 10 to move in the vertical direction. The end of the water supply pipe 10 located outside the ventilation duct 1 is connected to the external water supply pipeline, and the external water supply pipeline is a flexible pipe so as to follow the displacement of the water supply pipe 10; in this embodiment, the linear drive device adopts a linear motor module 11, and the water supply pipe 10 body located outside the ventilation duct 1 is connected to the slide 12 of the linear motor module 11. In actual application, the linear drive device can also adopt an electric push rod, and the electric push rod drives the water supply pipe 10 to move in the vertical direction.

[0031] In another implementation of this embodiment, the water supply pipe 10 is slidably connected to the ventilation duct 1 through a linear bearing, which ensures the stability of the water supply pipe 10 when it is displaced in the vertical direction, while avoiding the formation of a gap between the water supply pipe 10 and the ventilation duct 1, thereby improving the airtightness of the ventilation duct 1.

[0032] In this embodiment, when the ventilation is in normal working state, the sprinkler head 6 stops spraying water, the electric drain valve 5 is closed, the two electric air valves 2 are opened, the filter screen 7 is located inside the ventilation duct 1, and after the fresh air system starts working, the outdoor air enters the fresh air system after being filtered by the filter screen 7. Figure 1 shown.

[0033] When the filter 7 needs to be cleaned, the embodiment enters the cleaning working state, the fresh air system stops working, the outer rotor motor 8 drives the filter 7 to rotate outward to be arranged horizontally at 0 degrees, and controls the two electric air valves 2 to close. At this time, the filter 7 is located inside the trapezoidal cylinder 3, with the outer side of the filter 7 facing down and the inner side facing up; then the linear motor module 11 drives the water supply pipe 10 to move downward, so that the sprinkler head 6 reaches the water spraying position, as shown in FIG. Figure 4 As shown, the electric drain valve 5 is opened, and the sprinkler head 6 starts to spray water to achieve reverse flushing of the filter screen 7, so that foreign matter such as lint, dead leaves, etc. attached to the outer side of the filter screen 7 is separated from the filter screen 7 and falls into the interior of the trapezoidal cylinder 3 with the water flow, and is finally discharged through the drain outlet 4, completing the cleaning process of the filter screen 7.

[0034] After the filter 7 is cleaned, the normal ventilation state is restored, the sprinkler head 6 stops spraying water, and the linear motor module 11 drives the water supply pipe 10 to move upward, so that the sprinkler head 6 returns to its initial position. Figure 3As shown; the electric drain valve 5 is closed, the outer rotor motor 8 drives the filter 7 to rotate 90 degrees inward and arrange it vertically, and controls the two electric air valves 2 to open. At this time, the filter 7 returns to its position inside the ventilation duct 1, and the fresh air system restarts.

[0035] This embodiment uses a linear drive device to drive the water supply pipe 10 to move, so that the water spray head 6 is closer to the filter screen 7 to spray water, which not only improves the backwashing effect of the filter screen 7, but also reduces the water supply pressure and water consumption, achieving energy saving and environmental protection.

[0036] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0037] In the description of the present invention, it should be noted that: unless otherwise clearly stipulated and limited, the terms "installation", "connection", "setting" and "formation" should be understood in a broad sense; for example: it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components; for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. A self-cleaning ventilation device suitable for a fresh air system, comprising a ventilation duct, one end of which is connected to the outside and the other end is connected to the fresh air system, characterized in that: Two electric air valves are provided inside the ventilation duct, a trapezoidal cylinder is provided at the bottom of the ventilation duct between the two electric air valves, the trapezoidal cylinder and the ventilation duct are communicated with each other, a sewage outlet is provided at the bottom of the trapezoidal cylinder, and a water spray device is provided at the top of the ventilation duct between the two electric air valves; a filter screen and a drive device for driving the filter screen to rotate are provided inside the ventilation duct between the two electric air valves; In the ventilation working state, the two electric air valves are opened, and the filter is located inside the ventilation duct to filter the outdoor air; In the cleaning working state, the two electric air valves are closed, the filter is located inside the trapezoidal cylinder, and the water spray device reversely flushes the filter.

2. A self-cleaning ventilation device suitable for a fresh air system according to claim 1, characterized in that: The driving device drives the filter to rotate in an angle range of 0-90 degrees; when the filter is located inside the ventilation duct, the filter is arranged vertically at 90 degrees, and when the filter is located inside the trapezoidal cylinder, the filter is arranged horizontally at 0 degrees.

3. The self-cleaning ventilation device suitable for a fresh air system according to claim 2, characterized in that: The driving device is linked to the two electric air valves for control. When the driving device drives the filter to rotate to a horizontal arrangement of 0 degrees, the two electric air valves are linked to be closed. When the driving device drives the filter to rotate to a vertical arrangement of 90 degrees, the two electric air valves are linked to be opened.

4. A self-cleaning ventilation device suitable for a fresh air system according to any one of claims 1 to 3, characterized in that: The driving device is an outer rotor motor, the two ends of the stator shaft of the outer rotor motor are respectively connected to the front and rear side walls of the trapezoidal cylinder, and the bottom of the filter screen is connected to the rotor drum of the outer rotor motor.

5. The self-cleaning ventilation device suitable for a fresh air system according to claim 1, characterized in that: A rectangular limiting ring is provided inside the ventilation duct. When the filter screen is located inside the ventilation duct, the inner side edge of the filter screen contacts the rectangular limiting ring.

6. The self-cleaning ventilation device suitable for a fresh air system according to claim 5, characterized in that: A sealing rubber pad is provided on the surface of the rectangular limiting ring facing the filter screen.

7. The self-cleaning ventilation device suitable for a fresh air system according to claim 1, characterized in that: The water spray device includes a water spray head, and the water spray head is communicated with an external water supply pipeline.

8. The self-cleaning ventilation device suitable for a fresh air system according to claim 7, characterized in that: The water spraying device also includes a linear drive device and a water supply pipe. The water supply pipe vertically passes through the top of the ventilation duct and is slidably connected to the ventilation duct. The water spray head is installed at the end of the water supply pipe located inside the ventilation duct. The linear drive device is vertically arranged on the outside of the top of the ventilation duct and close to the water supply pipe. The water supply pipe body located outside the ventilation duct is connected to the linear drive device. The linear drive device is used to drive the water supply pipe to move in the vertical direction.

9. The self-cleaning ventilation device suitable for a fresh air system according to claim 8, characterized in that: The water supply pipe is slidably connected to the ventilation duct via a linear bearing.

10. The self-cleaning ventilation device suitable for a fresh air system according to claim 1, characterized in that: The sewage outlet is communicated with an external sewage pipe, and an electric sewage valve is arranged at the sewage outlet.

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