Fan ventilation method and device

Abstract

The invention discloses a fan ventilation method and device, and belongs to the technical field of fluid mechanical ventilation. The method comprises the steps that a device body with four cavities is provided, each cavity is provided with two internal ventilation openings and an external ventilation opening, and four communicating doors are formed between the adjacent cavities; a rotating shaft with an air deflector is arranged in the center of the cavity; an air inlet and an air outlet of the fan are connected to the outward ventilation openings of the two spaced cavities; opening and closing combinations of different communicating doors are switched by rotating the air guide plate, so that the air flow path is changed, and bidirectional ventilation is achieved. The device comprises four cavities, four communicating doors, a rotating shaft and an air guide plate, the communicating doors are controlled to be opened and closed through rotation of the air guide plate, and air direction switching is achieved under the condition that the rotating direction of a fan is not changed. The high-pressure fan is suitable for axial flow fans, centrifugal fans, Roots fans and other various fan types, particularly solves the problem that the high-pressure fan cannot rotate reversely to achieve two-way ventilation, and has the advantages of being simple in structure, flexible in wind direction switching, high in ventilation efficiency, easy to integrally control and the like.

Description

Technical Field

[0001] This invention relates to the field of fluid machinery ventilation technology, specifically to a fan ventilation method and corresponding device. Background Technology Ventilation is a key means of improving ambient air quality, and as a core power source, the ability of fans to adjust airflow direction directly affects the ventilation effect. Currently, the industry generally achieves airflow switching by changing the forward or reverse rotation of the fan itself; this method is mainly used in ventilation scenarios with axial flow fans.

[0002] However, existing technologies have significant drawbacks: on the one hand, axial flow fans suffer from low air pressure and low ventilation efficiency when changing air direction by turning, making it difficult to meet the requirements of scenarios with high ventilation efficiency; on the other hand, for centrifugal fans, Roots blowers, and other types of fans that require high air pressure, their structural characteristics limit their ability to adjust air direction by changing their own rotation, thus restricting the application of such high-pressure fans in scenarios requiring bidirectional ventilation and failing to meet actual usage needs.

[0003] Therefore, there is an urgent need for a fan ventilation technology that can adapt to different wind pressure scenarios, flexibly adjust the wind direction without relying on the fan's own rotation, and at the same time ensure ventilation efficiency, so as to make up for the shortcomings of existing technologies. Summary of the Invention

[0004] In view of the following problems existing in the ventilation technology of existing fans: (1) when the axial flow fan achieves air direction switching by reversing the direction, the air pressure is low and the efficiency is poor; (2) due to structural limitations, high pressure fans such as centrifugal fans and Roots fans cannot adjust the air direction by turning themselves, which limits their applicability in scenarios that require bidirectional ventilation; the present invention provides a fan ventilation method and device, which aims to achieve flexible switching of ventilation direction without relying on the fan's own rotation and without affecting the fan's working pressure, thereby improving the adaptability and ventilation efficiency of the ventilation system.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A ventilation method for a fan includes the following steps: S1, providing a device body with four chambers, each chamber having two internal ventilation openings and one external ventilation opening, with adjacent chambers connected by the internal ventilation openings to form four connecting doors; S2, setting a rotating shaft at the center of the four chambers, and fixing a guide plate on the shaft; S3, connecting the fan's inlet and outlet to the external ventilation openings of two spaced-apart chambers respectively; S4, rotating the guide plate to close two of the opposing connecting doors while maintaining the connection between the other two opposing doors. The door opens, thus forming a continuous airflow channel; S5, when the air guide plate is in the first angle position, the airflow flows in from the first external ventilation opening, passes through the first connecting door, the fan inlet, the fan, the fan outlet, and the second connecting door in sequence, and finally flows out from the second external ventilation opening, realizing ventilation in the first direction; S6, when the air guide plate rotates to the second angle position, the airflow flows in from the third external ventilation opening, passes through the third connecting door, the fan inlet, the fan, the fan outlet, and the fourth connecting door in sequence, and finally flows out from the fourth external ventilation opening, realizing ventilation in the second direction opposite to the first direction.

[0006] A ventilation and air exchange device for a fan, comprising: a main body consisting of four independent chambers: chamber A, chamber B, chamber C, and chamber D, each chamber having two internal ventilation openings and one external ventilation opening; four connecting doors: a first connecting door between chamber A and chamber B, a second connecting door between chamber B and chamber C, a third connecting door between chamber C and chamber D, and a fourth connecting door between chamber D and chamber A, each connecting door connecting to adjacent chambers through the internal ventilation openings, forming an internal airflow channel network; and a rotating shaft disposed within the enclosure of the four chambers. At the center, a guide vane is fixedly mounted on the rotating shaft. Its shape and position are designed so that two opposite connecting doors can be closed simultaneously during rotation, while keeping the other two opposite connecting doors open. The airflow path can be switched by rotating the guide vane to achieve wind direction switching. The structure is simple and does not require changing the fan's operating state. The external ventilation openings of chambers B and D are used to connect to the fan's air inlet and outlet, respectively, while the external ventilation openings of chambers A and C serve as airflow inlets or outlets. This connection method results in low fan operating pressure loss and is suitable for high-pressure ventilation scenarios.

[0007] Furthermore, the air guide plate has a cross-shaped or fan-shaped structure, which can completely cover the ventilation opening of the target connecting door after rotation, providing good sealing and effectively preventing airflow short circuit.

[0008] Furthermore, the rotating shaft can be driven manually, electrically, or pneumatically, facilitating remote or automatic control and improving operational convenience.

[0009] Furthermore, the connecting doors between the chambers, formed by the internal ventilation openings, are arranged in a rectangular or ring shape, resulting in a compact layout that helps reduce the size of the device and facilitates installation and integration within a limited space.

[0010] The present invention has the following beneficial effects: Flexible and efficient airflow switching: The airflow path is mechanically switched by rotating the air guide plate without changing the direction of the blower. It is especially suitable for high-pressure blowers that cannot be reversed, such as centrifugal blowers and Roots blowers, thus expanding their application range. Simple and reliable structure: The device consists only of a cavity, a connecting door, a rotating shaft and a guide plate. The mechanical structure is simple, the operation is stable and the failure rate is low. High ventilation efficiency: The optimized chamber and air guide plate design reduces local resistance and pressure loss, maintains the original air pressure of the fan, and improves the overall ventilation efficiency. Highly adaptable: It can be used in both high-pressure ventilation scenarios and conventional ventilation systems, adapting to ventilation and air exchange needs in various environments; Easy to control and integrate: It supports multiple drive modes such as manual and electric, is easy to integrate with existing ventilation systems, and can realize automated control to improve the intelligence of the system. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figure 1 This is a front view schematic diagram of the structure of the present invention.

[0012] Figure 2 This is a side view schematic diagram of the present invention.

[0013] Figure 3 yes Figure 2 AA cross-section view.

[0014] Figure 4 yes Figure 1 BB cross-section.

[0015] In the diagram: 1. Chamber A, 2. Chamber B, 3. Chamber C, 4. Chamber D, 5. Door connecting Chambers A and B, 6. Door connecting Chambers B and C, 7. Door connecting Chambers C and D, 8. Door connecting Chamber D and A, 9. Ventilation opening for Chamber A, 10. Ventilation opening for Chamber C, 11. Ventilation opening for Chamber B, 12. Ventilation opening for Chamber D, 13. Rotating shaft, 14. Air guide plate. Detailed Implementation To make the technical solution and beneficial effects of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are merely illustrative examples of the present invention and do not constitute a limitation thereof. Any modifications and substitutions made by those skilled in the art within the spirit and scope of the present invention are covered within the protection scope of the present invention.

[0016] Example 1 Reference Figures 1 to 4 As shown, this embodiment provides a fan ventilation device, which includes an integral main body composed of chamber A 1, chamber B 2, chamber C 3, and chamber D 4. The chambers are arranged in a rectangular shape, and adjacent chambers are connected by two internal ventilation openings, forming four connecting doors: a connecting door 5 between chamber A and chamber B, a connecting door 6 between chamber B and chamber C, a connecting door 7 between chamber C and chamber D, and a connecting door 8 between chamber D and chamber A.

[0017] Each chamber is equipped with an external ventilation opening, namely external ventilation opening 9 for chamber A, external ventilation opening 11 for chamber B, external ventilation opening 10 for chamber C, and external ventilation opening 12 for chamber D. A rotating shaft 13 is vertically arranged at the center of the four chambers. A cross-shaped air guide plate 14 is fixedly installed on the rotating shaft 13. The shape of its blades matches the shape of the opening of each connecting door, so as to achieve a sealed closure when rotating.

[0018] External vent 11 in chamber B is used to connect to the fan inlet, and external vent 12 in chamber D is used to connect to the fan outlet. External vent 9 in chamber A and external vent 10 in chamber C serve as air inlets and outlets connecting to the outside.

[0019] Example 2 This embodiment provides a fan ventilation method. When it is necessary to draw air from the direction of chamber C and exhaust air from the direction of chamber A, the following steps are performed: S1. Connect the fan inlet to the external ventilation port 11 of chamber B, and connect the fan outlet to the external ventilation port 12 of chamber D.

[0020] S2. Rotate the shaft 13 clockwise to drive the air guide plate 14 to rotate synchronously to the first working position. At this time, the air guide plate 14 completely closes the connecting door 5 and the connecting door 7, while the connecting door 6 and the connecting door 8 remain unobstructed.

[0021] S3. Start the fan. Outside air enters C chamber 3 from the external ventilation port 10 of C chamber, flows into B chamber 2 through the connecting door 6, and is then drawn into the fan through the external ventilation port 11 of B chamber.

[0022] S4. The air discharged by the fan enters chamber D4 through the external ventilation port 12 of chamber D, then enters chamber A1 through the connecting door 8, and finally exits through the external ventilation port 9 of chamber A, completing the ventilation process.

[0023] During this operation, the sealing structure of the air guide plate 14 effectively prevents airflow short-circuiting and ensures the uniqueness of the airflow path, thereby achieving directional ventilation from C to A without the need for the fan to reverse.

[0024] Example 3 This embodiment provides a fan ventilation method. When it is necessary to draw air in from chamber A and blow air in chamber C, the following steps are performed: S1. The fan connection method remains unchanged, with the air inlet connected to the external ventilation port 11 of chamber B and the air outlet connected to the external ventilation port 12 of chamber D.

[0025] S2. Rotate the shaft 13 counterclockwise to drive the air guide plate 14 to the second working position. At this time, the air guide plate 14 completely closes the connecting door 6 and the connecting door 8, while the connecting door 5 and the connecting door 7 remain unobstructed.

[0026] S3. Start the fan. External air enters chamber A 1 through the external ventilation port 9 of chamber A, flows into chamber B 2 through the connecting door 5, and is then drawn into the fan through the external ventilation port 11 of chamber B.

[0027] S4. The air discharged by the fan enters chamber D4 through the external ventilation port 12 of chamber D, then enters chamber C3 through the connecting door 7, and finally exits through the external ventilation port 10 of chamber C, completing the ventilation.

[0028] The ventilation direction can be switched by simply rotating the air guide plate 14. The structure is simple and reliable, and it is especially suitable for high-pressure fan scenarios such as centrifugal fans and Roots fans that are not suitable for frequent start-stop or reverse rotation.

[0029] Example 4: To further improve the applicability and automation level of the device, this embodiment also provides an optimized solution for the fan ventilation and air exchange device: 1. The air guide plate 14 can be made of lightweight composite material and covered with a rubber sealing strip to improve air tightness when closed, reduce internal leakage, and thus improve ventilation efficiency and wind pressure maintenance capability.

[0030] 2. The rotating shaft 13 can be connected to a micro geared motor, which is controlled by a controller to achieve the electric rotation of the air guide plate 14. The controller can receive manual signals, timing signals, or environmental sensor signals to achieve automatic switching of ventilation modes.

[0031] 3. Each chamber can be integrally die-cast from aluminum alloy, which has high structural strength, light weight, and corrosion resistance, making it suitable for harsh industrial environments such as humid and high temperature environments.

[0032] 4. The device may be equipped with a position sensor to detect the real-time angle of the air guide plate 14 and feed the status back to the control system to ensure accurate operation and enable fault self-diagnosis.

Claims

1. A method of fan ventilating, characterized in that, The method comprises the following steps: S1. providing a device body with four chambers, each chamber being provided with two inner air vents and one outer air vent, and the adjacent chambers being connected through the inner air vents to form four communication doors; S2. providing a rotating shaft at the center of the four chambers, and fixing a wind guide plate on the rotating shaft; S3. connecting the air inlet and air outlet of the fan to the outer air vents of two adjacent chambers; S4. rotating the wind guide plate to close two opposite communication doors while keeping the other two opposite communication doors open, thereby forming a continuous air flow channel; S5. when the wind guide plate is at a first angle position, the air flow enters from the first outer air vent, passes through the first communication door, the air inlet of the fan, the fan, the air outlet of the fan, the second communication door, and finally exits from the second outer air vent, thereby realizing ventilation in the first direction; S6. when the wind guide plate is rotated to a second angle position, the air flow enters from the third outer air vent, passes through the third communication door, the air inlet of the fan, the fan, the air outlet of the fan, the fourth communication door, and finally exits from the fourth outer air vent, thereby realizing ventilation in the second direction opposite to the first direction.

2. A fan ventilator, characterized in that The device body is composed of four independent chambers, i.e., A chamber, B chamber, C chamber, and D chamber, each chamber being provided with two inner air vents and one outer air vent; The four communication doors are respectively the first communication door between the A chamber and the B chamber, the second communication door between the B chamber and the C chamber, the third communication door between the C chamber and the D chamber, and the fourth communication door between the D chamber and the A chamber, each communication door connecting the adjacent chambers through the inner air vents; The rotating shaft is provided at the center of the four chambers; The wind guide plate is fixedly installed on the rotating shaft, and is designed in shape and position to simultaneously close two opposite communication doors while keeping the other two opposite communication doors open when rotated; The outer air vents of the B chamber and the D chamber are respectively connected to the air inlet and air outlet of the fan, and the outer air vents of the A chamber and the C chamber serve as the air inlet or outlet. The wind guide plate is in cross-shaped or fan-shaped structure.

3. The fan ventilator of claim 2, wherein The wind guide plate completely covers the air vents of the target communication door after rotation.

4. The fan ventilator of claim 2, wherein The rotating shaft can be driven by manual, electric, or pneumatic means.

5. The fan ventilator of claim 2, wherein The communication doors formed between the chambers through the inner air vents are in rectangular distribution.

6. The fan ventilator of claim 2, wherein The communication doors formed between the chambers through the inner air vents are in ring-shaped distribution.

7. The fan ventilator of claim 2, wherein The surface of the wind guide plate is covered with a sealing strip.

8. A fan-ventilator according to any one of claims 2 to 7, characterized in that The device further comprises a driving motor connected to the rotating shaft, and the driving motor is connected to a controller.

9. A fan plenum according to any one of claims 2 to 7, wherein, The device further comprises a position sensor for detecting the rotation angle of the wind guide plate, and the position sensor is connected to the controller.

10. The fan ventilator of claim 9, wherein, ​

Images