Operating mode self-adaptive switching device of magnetic suspension air blower

Abstract

The invention relates to the technical field of magnetic suspension blowers, and discloses an operation mode self-adaptive switching device of a magnetic suspension blower, which comprises a control panel and an impeller worm disc, the impeller worm disc comprises an air outlet pipe and an air inlet pipe, the air outlet pipe is provided with a pressure balance mechanism, and the pressure balance mechanism comprises a bypass seat, a closed body and an electromagnet. The closed body is in magnetic connection with the electromagnet and is connected into the bypass seat in a sliding mode, the electromagnet is located at the end, away from the air outlet pipe, of the bypass seat and is electrically connected with the control panel, a plurality of air holes are formed in the bypass seat, and when the electromagnet and the closed body repel each other, all the air holes are communicated with the air outlet pipe. By means of the technical scheme, the problem that in the prior art, when the modes are switched, the impeller and even the air blower body are prone to being damaged when the modes are switched due to the fact that pressure in the air outlet pipe is unbalanced and airflow flows backwards is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation blowers, and in particular to an operating mode adaptive switching device for a magnetic levitation blower. Background Art

[0002] The adaptive switching device for the operating mode of a magnetic levitation blower usually refers to a mechatronic system that integrates intelligent perception, dynamic decision-making and real-time control. It can automatically select the optimal operating mode (such as constant flow, constant pressure, variable frequency speed regulation, etc.) according to changes in operating conditions and achieve worry-free switching.

[0003] Therefore, common magnetic levitation blowers are usually equipped with intelligent control systems to achieve real-time control of the blower. Common control logic includes: using multiple sensors such as pressure sensors to monitor blower operating parameters (such as speed, flow, pressure, vibration, etc.) in real time, and feeding the monitored data back to the control system panel in real time. Preset parameter thresholds are set, and when the parameter thresholds exceed the range, the control module of the control system panel is triggered to drive the blower to complete the mode switch.

[0004] However, when switching from constant flow to constant pressure mode and the speed slows down, the flow rate inside the blower decreases, which will directly lead to a decrease in pressure at the blower impeller. The high-pressure gas previously generated by the blower operation is still in the blower pipeline, which eventually causes an instantaneous pressure difference to form in the blower pipeline (pipeline network, pipeline pressure > impeller outlet pressure), resulting in air flow backflow, causing the blower to surge and damage the blower. Summary of the Invention

[0005] The main purpose of the present invention is to provide an adaptive switching device for the operating mode of a magnetic levitation blower, which aims to solve the problem in the related art that the pressure imbalance in the outlet pipe during mode switching causes the air flow to flow back, making the impeller and even the blower body easily damaged during mode switching.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A device for adaptively switching the operating mode of a magnetic levitation blower includes a control panel and an impeller volute. The impeller volute includes an air outlet pipe and an air inlet pipe. The air outlet pipe is provided with a pressure balancing mechanism. The pressure balancing mechanism includes a bypass seat, a closing body, and an electromagnet. The closing body is magnetically connected to the electromagnet and slidingly connected to the bypass seat. The electromagnet is located at one end of the bypass seat away from the air outlet pipe and is electrically connected to the control panel. A plurality of air holes are provided on the bypass seat. When the electromagnet repels the closing body, each of the air holes is connected to the air outlet pipe.

[0008] Furthermore, the closing body includes a closing plate, a connecting rod, and a magnetic plate, and two ends of the connecting rod are fixedly connected to the closing plate and the magnetic plate respectively.

[0009] Furthermore, a matching countersunk hole for matching with the closing body is provided in the air outlet pipe.

[0010] Furthermore, a limiting ring is provided in the bypass seat for limiting the moving distance of the closed body.

[0011] Furthermore, the air holes are evenly distributed around the circumference of the closed body and are all located between the limiting ring and the air outlet pipe.

[0012] Furthermore, an elastic member for quickly resetting the bypass seat is provided between the bypass seat and the closing body.

[0013] Furthermore, the elastic member is located at an end of the limiting ring away from the air outlet pipe.

[0014] Furthermore, the projection surface of the closing plate in a direction perpendicular to the axis of the air outlet pipe is a circular structure.

[0015] The working principle and beneficial effects of the present invention are:

[0016] The technical solution of the present invention balances the change of airflow pressure in the air outlet pipe of the impeller volute in the traditional magnetic levitation blower during mode switching by arranging a pressure balancing mechanism on the air outlet pipe.

[0017] Specifically, the pressure balancing mechanism mainly includes a bypass seat, a closing body, and an electromagnet, wherein the bypass seat is fixedly arranged on the air outlet pipe (impeller volute) and is provided with a plurality of air holes. The closing body is slidably connected to the inside of the bypass seat and is magnetically connected to the electromagnet, that is, by changing the positive and negative poles of the electromagnet, the closing body slides in the bypass seat in a state of attraction or repulsion with the electromagnet. The electromagnet is fixedly arranged at one end of the bypass seat away from the air outlet pipe and is electrically connected to the control panel, that is, when the control module on the control panel receives the electrical signal transmitted from the internal monitoring module of the blower (such as a pressure sensor, etc.) and sends an electrical signal for switching the mode, it also sends an electrical signal for changing the positive and negative poles of the electromagnet, thereby ensuring that the pressure balancing mechanism can operate with the operation of the adaptive switching module of the traditional magnetic levitation blower, and then ensuring that the pressure balancing mechanism can switch the working state accordingly when the blower switches the operating mode.

[0018] Correspondingly, when the electromagnet repels each other, all the air holes are connected to the outlet pipe, that is, when the enclosing body repels each other, due to the pressure drop at the outlet pipe close to the impeller, it is difficult to resist the repulsive force from the electromagnet, causing the enclosing body to move toward the axial direction of the outlet pipe, canceling its sealing effect on the connection point between the bypass seat and the outlet pipe, opening up the path between each air hole and the outlet pipe, so that the outside gas can enter the outlet pipe along the path and offset the backflow of airflow, or the high-pressure airflow backflowing in the outlet pipe is discharged from the outlet pipe along the path, thereby eliminating the pressure, ensuring the safety of the impeller and the blower body, and realizing constant pressure control between the pressure balancing mechanism and the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the structure of this embodiment;

[0021] Figure 2 is a cross-sectional view of this embodiment;

[0022] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0023] Figure 4 Schematic diagram of the structure of the enclosure in this embodiment.

[0024] Description of Figure Numbers:

[0025] 1. Impeller volute; 11. Exhaust pipe; 111. Matching countersunk hole; 12. Inlet pipe; 2. Pressure balancing mechanism; 21. Bypass seat; 211. Air hole; 212. Limiting ring; 22. Closing body; 221. Closing plate; 222. Connecting rod; 223. Magnetic plate; 23. Electromagnet; 3. Elastic part.

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0028] like Figures 1 to 3 As shown, the embodiment proposes a running mode adaptive switching device of a magnetic suspension blower, mainly comprising a running mode adaptive switching unit, an impeller volute 1, wherein the running mode adaptive switching unit mainly comprises a control panel, a sensor network, the sensor network is electrically connected with the control panel; the sensor network mainly comprises flow meters, pressure sensors and other real-time monitoring sensors, that is, the internal situation of the blower is monitored in real time through the sensor network, and the monitoring data is sent to the control module of the control panel, and the running speed of the motor inside the magnetic suspension blower is determined by the control panel, so as to realize the switching of the mode. The specific judgment logic and operation logic of the running mode adaptive switching unit should be determined according to the specific type of the magnetic suspension blower actually adopted, and the embodiment will not be described here.

[0029] And the impeller volute 1 mainly comprises an air outlet pipe 11 and an air inlet pipe 12, wherein the air outlet pipe 11 is provided with a pressure balance mechanism 2, and the pressure balance mechanism 2 is provided to balance the internal pressure of the air outlet pipe 11, so as to avoid the instantaneous pressure difference caused by mode switching from causing the air flow in the air outlet pipe 11 to impact the impeller in the impeller volute 1, thereby damaging the impeller and even damaging the blower.

[0030] Specifically, the pressure balance mechanism 2 mainly comprises a bypass seat 21, a closed body 22 and an electromagnet 23, wherein the bypass seat 21 is provided with a plurality of air holes 211 and is fixedly arranged on the air outlet pipe 11, the closed body 22 is magnetically connected with the electromagnet 23 and is slidingly connected in the bypass seat 21, and correspondingly, the closed body 22 can slide in the closed body 22 according to the attraction and repulsion between the closed body 22 and the electromagnet 23; the electromagnet 23 is fixedly arranged on the end of the bypass seat 21 away from the air outlet pipe 11, so as to ensure that the electromagnet 23 can stably provide the force for displacing the closed body 22; and the electromagnet 23 itself is electrically connected with the control panel, specifically, when the control panel sends an electric signal for switching the running mode, it will send an electric signal for switching the positive and negative poles of the electromagnet 23, so as to control the closed body 22 to move to the specified position; so that the working state of the pressure balance mechanism 2 is switched with the switching of the running mode of the blower.

[0031] Correspondingly, when the electromagnet 23 repels the closure body 22, each air hole 211 is communicated with the air outlet pipe 11. That is, when the closure body 22 repels the electromagnet 23, due to the pressure drop near the impeller of the air outlet pipe 11, the internal pressure of the air outlet pipe 11 is difficult to resist the repulsion force from the electromagnet 23, causing the closure body 22 to move in the axial direction of the air outlet pipe 11, canceling the closure effect of the closure body 22 on the connection point between the bypass seat 21 and the air outlet pipe 11, opening the path between each air hole 211 and the air outlet pipe 11, so that external gas can enter the air outlet pipe 11 along the path, offset the backflow of the gas flow, or the backflow of the high-pressure gas flow in the air outlet pipe 11 is discharged along the path, realizing pressure elimination, ensuring the safety of the impeller and the blower body, and realizing constant pressure control between the pressure balance mechanism 2 and the impeller;

[0032] The bypass seat 21 is provided, so that the air outlet pipe 11 has a three-way structure: a first port (a communication port between the impeller installation position and the air outlet pipe 11), a second port (an outlet of the air outlet pipe 11), and a third port (the bypass seat 21). When the mode is just switched and the high-pressure gas in the air outlet pipe 11 backflows, the pressure at the second port is greater than the pressure at the first port, which is greater than the pressure at the third port. With the existence of the third port with the lowest pressure, the backflowing gas can be quickly discharged from the third port, thereby avoiding damage to the impeller by the backflowing gas and ensuring the stability and safety of the blower.

[0033] As shown in Figures 3-4 The closure body 22 in the embodiment mainly includes a closure plate 221, a connecting rod 222, and a magnetic plate 223. The two ends of the connecting rod 222 are fixedly connected with the closure plate 221 and the magnetic plate 223, respectively, so that the closure body 22 as a whole presents an I-shaped structure, ensuring the structural strength and providing sufficient gas passage between the closure body 22, the bypass seat 21, the air outlet pipe 11, and each air hole 211 to help balance the internal pressure of the air outlet pipe 11 under the repulsion of the electromagnet 23.

[0034] The air outlet pipe 11 is provided with a matching counterbore 111 for matching the closure body 22, so that after the closure body 22 is reset, the end away from the electromagnet 23 can be flush with the inner wall of the air outlet pipe 11, thereby avoiding interference of the existence of the closure body 22 to the gas flow output of the blower in the constant flow operation mode.

[0035] At the same time, the projection of the closure plate 221 on the direction perpendicular to the axis of the air outlet pipe 11 is circular, that is, to avoid sharp corners of the closure plate 221 in the direction of the gas flow, so that the gas flow impacting on the closure plate 221 can smoothly bypass along the arc surface of the circular structure, effectively preventing vortex from being generated at the closure plate 221, affecting the normal flow of the gas, and thereby interfering with the pressure balance work of the pressure balance mechanism 2.

[0036] In order to prevent the closing body 22 from directly separating from the bypass seat 21 under the action of the electromagnet 23, a limiting ring 212 is provided in the bypass seat 21 for limiting the moving distance of the closing body 22. The limiting ring 212 itself is fixedly connected to the bypass seat 21 and is located between the closing plate 221 and the magnetic plate 223. That is, when the closing plate 221 moves to a certain distance, the magnetic plate 223 will abut against the limiting ring 212, thereby limiting the continued movement of the closing body 22, thereby preventing the closing body 22 from separating from the magnetic field range of the electromagnet 23, and ensuring that subsequent reset and reuse work can be carried out normally.

[0037] In addition, an elastic member 3 is provided between the bypass seat 21 and the closing body 22 for rapid reset. The elasticity of the elastic member 3 is used to compensate for the hysteresis of the electrical signal, thereby effectively improving the operating efficiency of the pressure balancing mechanism 2.

[0038] The elastic member 3 is located at the end of the limiting ring 212 away from the air outlet pipe 11, that is, the elastic member 3 is prevented from being located in the communication path between the air outlet pipe 11 and each air hole 211 to interfere with the flow of gas.

[0039] The elastic member 3 in this embodiment is preferably an annular elastic member such as a compression spring, so that it can be directly installed between the limiting ring 212 and the magnetic plate 223 in a sleeve manner.

[0040] At the same time, the air holes 211 are evenly distributed around the circumference of the closed body 22 and are all located between the limiting ring 212 and the air outlet pipe 11, effectively shortening the distance between the air holes 211 and the air outlet pipe 11 to facilitate rapid gas circulation.

[0041] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An adaptive switching device for an operating mode of a magnetic levitation blower, comprising a control panel and an impeller volute (1), wherein the impeller volute (1) comprises an air outlet pipe (11) and an air inlet pipe (12), and is characterized in that: The air outlet pipe (11) is provided with a pressure balancing mechanism (2), the pressure balancing mechanism (2) comprising a bypass seat (21), a closing body (22), and an electromagnet (23). The closing body (22) is magnetically connected to the electromagnet (23) and is slidably connected to the bypass seat (21). The electromagnet (23) is located at one end of the bypass seat (21) away from the air outlet pipe (11) and is electrically connected to a control panel. The bypass seat (21) is provided with a plurality of air holes (211). When the electromagnet (23) and the closing body (22) repel each other, each of the air holes (211) is communicated with the air outlet pipe (11).

2. The operation mode adaptive switching device of the magnetic levitation blower according to claim 1 is characterized in that: The closing body (22) comprises a closing plate (221), a connecting rod (222), and a magnetic plate (223), and two ends of the connecting rod (222) are respectively fixedly connected to the closing plate (221) and the magnetic plate (223).

3. The operation mode adaptive switching device of the magnetic levitation blower according to claim 1 or 2, characterized in that: The air outlet pipe (11) is provided with a matching countersunk hole (111) for matching the closing body (22).

4. The operation mode adaptive switching device of the magnetic levitation blower according to claim 1 or 2, characterized in that: A limiting ring (212) for limiting the moving distance of the closing body (22) is provided in the bypass seat (21).

5. The operation mode adaptive switching device of the magnetic levitation blower according to claim 4 is characterized in that: The air holes (211) are evenly distributed around the circumference of the closed body (22) and are all located between the limiting ring (212) and the air outlet pipe (11).

6. The operation mode adaptive switching device of the magnetic levitation blower according to claim 4, characterized in that: An elastic member (3) for quickly resetting the bypass seat (21) is provided between the bypass seat (21) and the closing body (22).

7. The operation mode adaptive switching device of the magnetic levitation blower according to claim 6, characterized in that: The elastic member (3) is located at an end of the limiting ring (212) away from the air outlet pipe (11).

8. The operation mode adaptive switching device of the magnetic levitation blower according to claim 2, characterized in that: The projection surface of the closing plate (221) in a direction perpendicular to the axis of the air outlet pipe (11) is a circular structure.

Images