A ventilator

Abstract

The present invention discloses a ventilator, comprising a ventilator body, a support column, universal wheels, a telescopic power source, a mounting plate, an anti-slip sheet and a suction cup. The support column is arranged on the ventilator body for supporting the ventilator body, and a support plate is arranged at the bottom end of the support column; there are multiple universal wheels, and the multiple universal wheels are spaced apart and distributed on the edge of the support plate, and the support plate is supported on the ground by the universal wheels; the telescopic power source is vertically arranged on the support plate; the mounting plate is arranged on the telescopic shaft of the telescopic power source, and the telescopic shaft of the telescopic power source can drive the mounting plate to move perpendicular to the ground; the anti-slip sheet is arranged on the side of the mounting plate close to the ground; the suction cup is arranged on the edge of the mounting plate, and when the anti-slip sheet is against the ground, the suction cup can be adsorbed on the ground. This ventilator can be conveniently fixed in a train compartment and is easy to move.

Description

Technical Field

[0001] The present invention relates to a ventilator. Background Art

[0002] In modern clinical medicine, ventilators, as an effective means of artificially replacing spontaneous ventilation, are widely used for respiratory failure caused by various causes, as well as for anesthesia and respiratory management during major surgery, respiratory support therapy, and emergency resuscitation. They hold a crucial position in modern medicine. Ventilators are vital medical devices that can prevent and treat respiratory failure, reduce complications, and save and prolong patients' lives.

[0003] High-speed trains are a vital form of transportation in my country due to their high speeds. To cope with sudden illnesses in passengers, ventilators are almost mandatory on high-speed trains. However, during use, it was discovered that because ventilators are typically placed directly inside the train compartments, they can shift during train starts and stops due to inertia. Especially during sudden stops, the ventilators can slide along the train floor for long distances, even posing a risk of tipping over. To prevent this, medical staff often need to temporarily secure the ventilators with ropes or other means. While this prevents accidental movement, the ropes must be untied when the ventilator needs to be moved. This is a particularly cumbersome operation, especially for critically ill patients, as it can delay rescue efforts. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a ventilator that can be conveniently fixed in a train compartment and is easy to move.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solution: a ventilator, comprising:

[0006] Ventilator body;

[0007] A support column is provided on the ventilator body for supporting the ventilator body, and a support plate is provided at the bottom end of the support column;

[0008] Universal wheels, there are multiple universal wheels, and the multiple universal wheels are distributed at intervals on the edge of the support plate, and the support plate is supported on the ground by the universal wheels;

[0009] A telescopic power source is vertically arranged on the support plate;

[0010] A mounting plate, the mounting plate being arranged on the telescopic shaft of the telescopic power source, and the telescopic shaft of the telescopic power source being able to drive the mounting plate to move perpendicular to the ground;

[0011] an anti-slip sheet, arranged on the side of the mounting plate close to the ground; and

[0012] The suction cup is arranged at the edge of the mounting plate, and when the anti-slip sheet is against the ground, the suction cup can be adsorbed on the ground.

[0013] Furthermore, it also includes a negative pressure suction device, which includes an air pump and a control component. The air pump is arranged on the mounting plate, the suction cup is arranged on the air suction port of the air pump, and the control component is arranged in the mounting plate and connected to the air pump. When the entire ventilator moves, the control component can start the air pump to draw air.

[0014] Furthermore, the control assembly includes a rotating rod, a roller, a first bevel gear, a screw, a second bevel gear, an on-off control wheel, a guide rod, and a conductive sheet; a mounting cavity is defined in the mounting plate, a through-hole communicating with the mounting cavity is provided on the bottom surface of the mounting plate, the rotating rod is transversely and rotatably disposed in the mounting cavity, the roller and the first bevel gear are coaxially disposed on the rotating rod, and an outer edge of the roller extends through the through-hole;

[0015] The screw and the guide rod are vertically and rotatably arranged on the inner top surface of the installation cavity, the second bevel gear is coaxially arranged on the screw and rotatably meshes with the first bevel gear, the on-off control wheel is a conductor, and the on-off control wheel is sleeved on the screw thread and connected to the screw thread, and the end of the guide rod is slidably plugged into the on-off control wheel;

[0016] There are two groups of control switches for the vacuum pump, and the two groups of control switches are connected in parallel. The two groups of control switches are arranged in the installation cavity with an upper and lower interval, and the positive and negative plates of each group of control switches are respectively arranged on the left and right inner walls of the installation cavity. There are two conductive plates, and the two conductive plates are symmetrically arranged on the left and right sides of the on-off control wheel. When the on-off control wheel moves upward, the two conductive plates can be slidably connected to the positive and negative plates above, respectively. When the on-off control wheel moves downward, the two conductive plates can be slidably connected to the positive and negative plates below, respectively.

[0017] Furthermore, the control assembly further includes a reset rod, which is arranged at the top end of the screw rod and can pass through the top of the rotatable mounting plate.

[0018] Furthermore, an indicator light is provided on the on-off control wheel, the indicator light is connected in series with the on-off control wheel, and a light-transmitting hole is provided on the mounting plate.

[0019] Furthermore, an edge of the conductive sheet close to a side surface of the mounting cavity is provided with a chamfer.

[0020] Furthermore, the control assembly further includes an elastic member, and the conductive sheet is electrically connected to the on-off control wheel via the elastic member.

[0021] Furthermore, a pressure control switch is provided on the air pump, a pressure sensor is provided in the suction cup, the pressure sensor is electrically connected to the pressure control switch, and the pressure sensor is used to control the start-up of the air pump.

[0022] Furthermore, a handle is provided on the outer surface of the suction cup.

[0023] Beneficial effects of the present invention:

[0024] The above-mentioned ventilator can be moved by the universal wheels when it is necessary to move the ventilator. When the entire ventilator needs to be fixed to the ground, the telescopic power source is first started. The telescopic power source drives the mounting plate to move against the ground until the anti-slip sheet is pressed against the ground. At the same time, the suction cup is pressed against the ground, the air between the suction cup and the ground is discharged, and the suction cup is adsorbed on the ground. The joint action of the anti-slip sheet and the suction cup can fix the ventilator to the ground to prevent the ventilator from moving relative to the external transportation tool. When it needs to be moved again, it is only necessary to start the telescopic power source to retract the mounting plate, and the anti-slip sheet and the suction cup are separated from the ground. Then, the ventilator can be pushed to move by the universal wheels.

[0025] The ventilator can be fixed to the ground by anti-slip sheets and suction cups to prevent it from sliding around in the vehicle. When it does not need to be moved, it can be pushed by the universal wheels, thereby improving its flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0027] Figure 1 A schematic diagram of a ventilator provided in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of a ventilator in which universal wheels are supported on the ground is shown;

[0029] Figure 3 for Figure 1 A schematic diagram of a negative pressure suction device in a ventilator is shown;

[0030] Figure 4 for Figure 1A schematic diagram of a ventilator in which a conductive sheet is connected to the positive and negative electrode sheets above;

[0031] Figure 5 for Figure 1 A schematic diagram of a ventilator in which a conductive sheet is connected to the positive and negative electrode sheets below;

[0032] Figure 6 for Figure 1 A schematic diagram of a handle in a ventilator is shown;

[0033] Reference numerals:

[0034] 100. Main body; 200. Support column; 300. Universal wheel; 400. Telescopic power source; 500. Mounting plate; 600. Anti-slip sheet; 700. Suction cup; 710. Handle; 800. Negative pressure suction device; 810. Air pump; 811. Positive electrode; 812. Negative electrode; 820. Control component; 8201. Rotating rod; 8202. Roller; 8203. First bevel gear; 8204. Screw; 8205. Second bevel gear; 8206. On / off control wheel; 8207. Guide rod; 8208. Conductive sheet; 8209. Reset rod; 8210. Indicator light; 8211. Elastic member. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0036] See Figures 1 to 6 The present invention provides a ventilator, comprising a ventilator body 100, a support column 200, a universal wheel 300, a telescopic power source 400, a mounting plate 500, an anti-slip sheet 600, and a suction cup 700. The ventilator is mainly used in mobile vehicles such as high-speed trains, airplanes, and ships.

[0037] Specifically, a support column 200 is provided on the ventilator body 100 to support the ventilator body 100. A support plate is provided at the bottom end of the support column 200. Multiple universal wheels 300 are spaced apart along the edges of the support plate, which are supported on the ground by the universal wheels 300. When the ventilator needs to be moved, the universal wheels 300 are used to move it.

[0038] The telescopic power source 400 is vertically arranged on the support plate. The mounting plate 500 is arranged on the telescopic shaft of the telescopic power source 400, and the telescopic shaft of the telescopic power source 400 can drive the mounting plate 500 to move perpendicular to the ground. In this embodiment, the telescopic power source 400 can preferably be a telescopic motor commonly used in the prior art. Of course, other telescopic mechanisms that can drive the mounting plate 500 to move perpendicular to the ground can also be selected. The anti-slip sheet 600 is arranged on the side of the mounting plate 500 close to the ground. In specific implementation, the anti-slip sheet 600 can be selected from silicone pads, rubber pads, etc. with anti-slip patterns. The suction cup 700 is arranged at the edge of the mounting plate 500. When the anti-slip sheet 600 is against the ground, the suction cup 700 can be adsorbed on the ground.

[0039] When the ventilator needs to be moved, it can be moved through the universal wheel 300. When the entire ventilator needs to be fixed to the ground, the telescopic power source 400 is first started. The telescopic power source 400 drives the mounting plate 500 to move against the ground until the anti-slip sheet 600 is pressed against the ground. At the same time, the suction cup 700 is pressed against the ground, and the air between the suction cup 700 and the ground is discharged, and the suction cup 700 is adsorbed on the ground. Through the combined action of the anti-slip sheet 600 and the suction cup 700, the ventilator can be fixed to the ground to prevent the ventilator from moving relative to the external transportation vehicle. When it needs to be moved again, it is only necessary to start the telescopic power source 400 to retract the mounting plate 500, and the anti-slip sheet 600 and the suction cup 700 are separated from the ground. Then, the ventilator can be pushed to move by the universal wheel 300.

[0040] The ventilator can be fixed to the ground by the anti-slip sheet 600 and the suction cup 700 to prevent the ventilator from sliding freely in the vehicle compartment. When it does not need to be moved, it can be pushed by the universal wheel 300, thereby improving the flexibility of use.

[0041] See Figure 1 and Figure 3 In this embodiment, the ventilator further includes a negative pressure suction device 800. Specifically, the negative pressure suction device 800 includes a suction pump 810 and a control component 820. The suction pump 810 is provided on the mounting plate 500, the suction cup 700 is provided on the suction port of the suction pump 810, and the control component 820 is provided within the mounting plate 500 and connected to the suction pump 810. When the entire ventilator moves, the control component 820 can start the suction pump 810 to extract air.

[0042] When the suction cup 700 is attached to the ground, air is pumped out through the air pump 810, increasing the negative pressure between the suction cup 700 and the ground, thereby improving the fixation effect. The control component 820 is used to control the air pump 810. When the ventilator moves, the control component 820 will activate the air pump 810 to pump air, thereby increasing the negative pressure between the suction cup 700 and the ground during the movement, until the suction cup 700 is firmly attached to the ground.

[0043] See Figures 3 to 6 Specifically, the control assembly 820 includes a rotating rod 8201, a roller 8202, a first bevel gear 8203, a screw 8204, a second bevel gear 8205, an on / off control wheel 8206, a guide rod 8207, and a conductive sheet 8208. The mounting plate 500 defines a mounting cavity, and a through-hole is provided on the bottom surface of the mounting plate 500, communicating with the mounting cavity. The rotating rod 8201 is rotatably disposed transversely within the mounting cavity. The roller 8202 and the first bevel gear 8203 are coaxially disposed on the rotating rod 8201, with the outer edge of the roller 8202 extending through the through-hole.

[0044] Screw 8204 and guide rod 8207 are vertically and rotatably mounted on the inner top surface of the mounting cavity. A second bevel gear 8205 is coaxially mounted on screw 8204 and rotatably meshes with first bevel gear 8203. An on / off control wheel 8206 is electrically conductive and is sleeved onto and threadedly connected to the threads of screw 8204. The end of guide rod 8207 is slidably engaged with on / off control wheel 8206.

[0045] The vacuum pump 810 has two sets of control switches, which are connected in parallel and spaced apart in the mounting cavity. The positive electrode 811 and negative electrode 812 of each set of control switches are respectively disposed on the left and right inner walls of the mounting cavity. There are two conductive plates 8208, which are symmetrically disposed on the left and right sides of the on-off control wheel 8206. When the on-off control wheel 8206 moves upward, the two conductive plates 8208 can slide and connect with the upper positive electrode 811 and negative electrode 812 respectively. When the on-off control wheel 8206 moves downward, the two conductive plates 8208 can slide and connect with the lower positive electrode 811 and negative electrode 812 respectively.

[0046] In normal state, the on-off control wheel 8206 stays between the upper and lower sets of positive and negative plates, the two conductive plates 8208 are separated from the positive plates 811 and negative plates 812 on the left and right sides, the two sets of control switches of the vacuum pump 810 are in the power-off state, and the vacuum pump 810 does not pump air.

[0047] When the inertial force received by the ventilator is greater than the sum of the friction between the anti-slip sheet 600 and the ground and the negative pressure between the suction cup and the ground, when the anti-slip sheet 600 slides forward along the ground, the roller 8202 will roll on the ground while the anti-slip sheet 600 slides forward along the ground. When the roller 8202 rolls forward, it will drive the rotating rod 8201 and the first bevel gear 8203 to rotate. The first bevel gear 8203 drives the screw 8204 to rotate through the second bevel gear 8205. The on-off control wheel 8206 moves upward under the action of the thread, driving the conductive sheet 8208 to move. When the conductive sheet 8208 moves upward, the positive electrode sheet 811 and the negative electrode sheet 812 above can be connected, so that the air pump 810 starts to pump air.

[0048] Similarly, when the anti-slip sheet 600 slides backward along the ground, the roller 8202 will roll on the ground while the anti-slip sheet 600 slides backward along the ground. When the roller 8202 rolls backward, it will drive the rotating rod 8201 and the first bevel gear 8203 to rotate. The first bevel gear 8203 drives the screw 8204 to rotate through the second bevel gear 8205. The on-off control wheel 8206 moves downward under the action of the thread, driving the conductive sheet 8208 to move. When the conductive sheet 8208 moves downward, the positive electrode sheet 811 and the negative electrode sheet 812 below can be connected, thereby enabling the vacuum pump 810 to start pumping air.

[0049] The vacuum pump 810 pumps air to increase the negative pressure between the suction cup 700 and the ground. As the ventilator continues to move, the vacuum pump 810 continues to pump air. When the negative pressure is large enough, the ventilator can be stopped.

[0050] As a preferred embodiment, the air pump 810 is provided with a pressure control switch, and a pressure sensor is provided in the suction cup 700. The pressure sensor is electrically connected to the pressure control switch and is used to control the activation of the air pump 810. The pressure sensor is used to detect the negative pressure in the suction cup 700. When the negative pressure in the suction cup 700 reaches a certain value, the air pump 810 is turned off through the pressure control switch to prevent the air pump 810 from being in the exhaust state after the pressure in the suction cup 700 is sufficient to fix the entire ventilator to the ground.

[0051] In addition, in this embodiment, a handle 710 is provided on the outer surface of the suction cup 700. When the ventilator needs to be moved, the suction cup 700 can be pulled by the handle 710 to allow external air to enter the suction cup 700, so that the negative pressure between the suction cup 700 and the ground disappears, and the ventilator can be moved.

[0052] When using this negative pressure suction device 800, there is no need to manually start the suction pump 810 during use. When the ventilator moves, the suction pump 810 will automatically start, and when the preset negative pressure is reached, it will automatically stop, thereby improving ease of use.

[0053] In this embodiment, the edge of the conductive sheet 8208 near the side of the mounting cavity is chamfered. This chamfer facilitates the movement of the conductive sheet 8208 along the positive electrode sheet 811 and the negative electrode sheet 812. Furthermore, the control assembly 820 also includes an elastic member 8211. The conductive sheet 8208 is electrically connected to the on / off control wheel 8206 via the elastic member 8211. The elastic member 8211 not only presses the conductive sheet 8208 against the positive electrode sheet 811 and the negative electrode sheet 812, but also allows for smooth movement of the conductive sheet 8208.

[0054] As a preferred embodiment, the control assembly 820 also includes a reset rod 8209. The reset rod 8209 is disposed at the top of the screw 8204 and extends out of the top of the rotatable mounting plate 500. During use, the on-off control wheel 8206 can be moved between the two sets of control switches by rotating the reset rod 8209, ready for next use. In addition, an indicator light 8210 is provided on the on-off control wheel 8206. The indicator light 8210 is connected in series with the on-off control wheel 8206, and a light-transmitting hole is provided on the mounting plate 500. When the positive and negative electrodes are in the power-on state, the indicator light 8210 illuminates. When the positive and negative electrodes are in the power-off state, the indicator light 8210 turns off, so that it is convenient to know whether the on-off control wheel 8206 is located between the two sets of control switches.

[0055] The specific usage and working principle of the above-mentioned ventilator:

[0056] In normal operation, the universal wheel 300 is off the ground, the anti-slip sheet 600 is pressed against the ground, and the suction cup 700 is pressed and adsorbed to the ground. The entire ventilator is in a different state. At this time, the on-off control wheel 8206 is located between the upper and lower sets of positive and negative electrodes 812. The two conductive sheets 8208 are disconnected from the positive and negative electrodes 811 and 812 on the left and right sides. Both control switches of the air pump 810 are powered off, and the air pump 810 is not pumping air.

[0057] When the inertial force received by the ventilator is greater than the sum of the friction between the anti-slip sheet 600 and the ground and the negative pressure between the suction cup and the ground, when the anti-slip sheet 600 slides forward along the ground, the roller 8202 will roll on the ground while the anti-slip sheet 600 slides forward along the ground. When the roller 8202 rolls forward, it will drive the rotating rod 8201 and the first bevel gear 8203 to rotate. The first bevel gear 8203 drives the screw 8204 to rotate through the second bevel gear 8205. The on-off control wheel 8206 moves upward under the action of the thread, driving the conductive sheet 8208 to move. When the conductive sheet 8208 moves upward, the positive electrode sheet 811 and the negative electrode sheet 812 above can be connected, so that the air pump 810 starts to pump air.

[0058] Similarly, when the anti-slip sheet 600 slides backward along the ground, the roller 8202 will roll on the ground while the anti-slip sheet 600 slides backward along the ground. When the roller 8202 rolls backward, it will drive the rotating rod 8201 and the first bevel gear 8203 to rotate. The first bevel gear 8203 drives the screw 8204 to rotate through the second bevel gear 8205. The on-off control wheel 8206 moves downward under the action of the thread, driving the conductive sheet 8208 to move. When the conductive sheet 8208 moves downward, the positive electrode sheet 811 and the negative electrode sheet 812 below can be connected, thereby enabling the vacuum pump 810 to start pumping air.

[0059] When the negative pressure in the suction cup 700 reaches a certain value, the suction pump 810 is turned off by the pressure control switch to prevent the suction pump 810 from being in the suction state after the pressure in the suction cup 700 is sufficient to fix the entire ventilator to the ground.

[0060] When the ventilator needs to be moved, the suction cup 700 can be pulled by the handle 710 to allow air to enter the suction cup 700 and restore the pressure inside the suction cup 700 to a natural state. Then the telescopic power source 400 is started to move the mounting plate 500, the anti-slip sheet 600 and the suction cup 700 upward until the universal wheel 300 touches the ground, thereby pushing the entire ventilator to move.

[0061] In addition, after each free movement of the ventilator, the on-off control wheel 8206 can be driven to the power-off position between the two sets of control switches via the reset lever 8209 to ensure that the negative pressure suction device 800 can automatically start the next time. During the operation, the indicator light 8210 can be observed: when the positive and negative electrodes are in the power-on state, the indicator light 8210 illuminates; when the positive and negative electrodes are in the power-off state, the indicator light 8210 turns off, so that the on-off control wheel 8206 can be easily determined to be between the two sets of control switches.

[0062] The ventilator can be fixed to the ground via the anti-slip sheet 600 and suction cup 700, preventing it from sliding around in the vehicle. When not in use, it can be pushed using the universal wheels 300, enhancing its flexibility. The suction pump 810 automatically starts when movement occurs and automatically stops when the preset pressure is reached, further enhancing the ventilator's ease of use.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A ventilator, characterized in that: include: Ventilator body; A support column is provided on the ventilator body for supporting the ventilator body, and a support plate is provided at the bottom end of the support column; Universal wheels, there are multiple universal wheels, and the multiple universal wheels are distributed at intervals on the edge of the support plate, and the support plate is supported on the ground by the universal wheels; A telescopic power source is vertically arranged on the support plate; A mounting plate, the mounting plate being arranged on the telescopic shaft of the telescopic power source, and the telescopic shaft of the telescopic power source being able to drive the mounting plate to move perpendicular to the ground; an anti-slip sheet, arranged on the side of the mounting plate close to the ground; and A suction cup is provided at the edge of the mounting plate, and when the anti-slip sheet contacts the ground, the suction cup can be adsorbed on the ground; The invention also includes a negative pressure suction device, which includes an air pump and a control component. The air pump is arranged on the mounting plate, the suction cup is arranged on the air suction port of the air pump, and the control component is arranged in the mounting plate and connected to the air pump. When the entire ventilator moves, the control component can start the air pump to pump air; The control assembly includes a rotating rod, a roller, a first bevel gear, a screw, a second bevel gear, an on-off control wheel, a guide rod, and a conductive sheet; a mounting cavity is defined in the mounting plate, a through-hole communicating with the mounting cavity is provided on the bottom surface of the mounting plate, the rotating rod is transversely and rotatably disposed in the mounting cavity, the roller and the first bevel gear are coaxially disposed on the rotating rod, and the outer edge of the roller extends through the through-hole; The screw and the guide rod are vertically and rotatably arranged on the inner top surface of the installation cavity, the second bevel gear is coaxially arranged on the screw and rotatably meshes with the first bevel gear, the on-off control wheel is a conductor, and the on-off control wheel is sleeved on the screw thread and connected to the screw thread, and the end of the guide rod is slidably plugged into the on-off control wheel; There are two groups of control switches for the vacuum pump, and the two groups of control switches are connected in parallel. The two groups of control switches are arranged in the installation cavity with an upper and lower interval, and the positive and negative plates of each group of control switches are respectively arranged on the left and right inner walls of the installation cavity. There are two conductive plates, and the two conductive plates are symmetrically arranged on the left and right sides of the on-off control wheel. When the on-off control wheel moves upward, the two conductive plates can be slidably connected to the positive and negative plates above, respectively. When the on-off control wheel moves downward, the two conductive plates can be slidably connected to the positive and negative plates below, respectively.

2. The ventilator according to claim 1, wherein: The control assembly further comprises a reset rod, which is arranged at the top end of the screw rod and can pass through the top of the rotatable mounting plate.

3. The ventilator according to claim 1, wherein: An indicator light is provided on the on-off control wheel, the indicator light is connected in series with the on-off control wheel, and a light-transmitting hole is provided on the mounting plate.

4. The ventilator according to claim 1, wherein An edge of the conductive sheet close to a side surface of the mounting cavity is provided with a chamfer.

5. The ventilator according to claim 1, characterized in that The control assembly further includes an elastic member, and the conductive sheet is electrically connected to the on-off control wheel via the elastic member.

6. The ventilator according to claim 1, characterized in that The vacuum pump is provided with a pressure control switch, and a pressure sensor is provided in the suction cup. The pressure sensor is electrically connected to the pressure control switch, and the pressure sensor is used to control the start-up of the vacuum pump.

7. The ventilator according to claim 1 or 6, characterized in that: A handle is provided on the outer surface of the suction cup.

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