Vacuum pump silencer with heat dissipation function and cutting bed

Abstract

This invention provides a vacuum pump silencing device with heat dissipation function, including a housing and a vacuum pump. The vacuum pump includes a motor and a pump body, with an air inlet and an air outlet on the pump body. The housing contains a main chamber, a first air inlet chamber, and a second air inlet chamber. It also includes an electric valve and a filter silencing box disposed in the main chamber and sequentially connected to the air inlet. The filter silencing box has a lower chamber and an upper chamber. The lower chamber has multiple filter holes on its side wall, and the upper chamber is connected to the electric valve. This invention also provides a cutting bed, including the aforementioned vacuum pump silencing device. The advantage of this invention is that by dividing the housing into two air inlet chambers and adding a connection port at the vacuum pump air inlet, which connects the electric valve and the filter silencing box, the gas around the vacuum pump flows rapidly, carrying away heat and achieving heat dissipation. Simultaneously, the arrangement of the air inlet chambers, the air inlet silencing box, and the filter silencing box can effectively reduce the noise of the vacuum pump during operation.

Description

Technical Field

[0001] This invention relates to the field of vacuum pump technology, and in particular to a vacuum pump silencing device and cutting bed with heat dissipation function. Background Technology

[0002] The vacuum system of a cutting table currently includes a vacuum pump and an adsorption plate with air extraction holes. The vacuum pump extracts air from the vicinity of the air extraction holes, creating a negative pressure at the air extraction holes. The adsorption plate can then adsorb the fabric, preventing the fabric from moving or deviating during the cutting process and increasing the number of cutting layers.

[0003] During the operation of a vacuum pump, the gas flow generates significant noise. Therefore, the cutting industry commonly places vacuum pumps within a housing structure. The housing helps isolate the vacuum pump noise and reduce its decibel level. However, this housing cannot be completely sealed; it must be connected to the outside environment to aid in heat dissipation and prevent the internal temperature from exceeding a critical point and damaging the vacuum pump bearings. Among the commonly used vacuum pump housings on the market, one type includes a large air inlet, which has poor sound insulation; another type uses fans for front and rear cooling, but the fans also generate noise during operation, which can negatively impact sound insulation performance. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum pump silencing device with heat dissipation function, so as to simultaneously meet the needs of heat dissipation and noise reduction.

[0005] This invention provides a vacuum pump silencing device with heat dissipation function, including a housing and a vacuum pump disposed in the housing. The vacuum pump includes a motor and a pump body, with an air inlet and an air outlet on the pump body. The housing has a main chamber, a first air inlet chamber, and a second air inlet chamber. The vacuum pump is disposed in the main chamber. Both the air inlet and the air outlet are connected to the outside. The motor is connected to the outside through the first air inlet chamber, and the main chamber is connected to the outside through the second air inlet chamber. The device also includes an electric valve disposed in the main chamber and connected in sequence to the air inlet chamber, and a filter silencing box. The filter silencing box has a lower chamber and an upper chamber arranged in sequence from bottom to top. The side wall of the lower chamber has multiple filter holes, and the upper chamber is connected to the electric valve.

[0006] Preferably, the side wall of the filter silencer box is also provided with a sound-absorbing perforated plate and sound-absorbing cotton.

[0007] Preferably, the electric valve and the filter silencer box are connected by a silencer pipe.

[0008] Preferably, the filter silencer box includes a filter silencer box body and a filter silencer box panel covering the filter silencer box body. The filter silencer box body is provided with a partition plate, and the lower chamber and the upper chamber are located below and above the partition plate, respectively. The filter silencer box panel is provided with a connection hole and the plurality of filter holes, and the upper chamber is connected to the silencer pipe through the connection hole.

[0009] Preferably, the second air intake chamber is provided with an air intake muffler box, which includes an air intake muffler box body, an inlet and an outlet opened on the air intake muffler box body, and a plurality of baffles arranged alternately in the air intake muffler box body. The inlet is connected to the outside, and the outlet is connected to the main chamber.

[0010] Preferably, the intake muffler box is also provided with a handle.

[0011] Preferably, the system further includes a control system and a temperature sensor disposed in the main chamber, wherein the temperature sensor and the electric valve are respectively connected to the control system.

[0012] The present invention provides a cutting bed, including the aforementioned vacuum pump silencing device.

[0013] Preferably, it includes an adsorption platform, the adsorption platform is provided with an air extraction hole, and the air inlet is connected to the air extraction hole.

[0014] The advantage of this invention is that by dividing the housing into two air inlet chambers and adding a connection port at the air inlet of the vacuum pump, which connects to the electric valve and the filter silencer box, the gas around the vacuum pump can flow rapidly, carrying away heat and achieving the purpose of heat dissipation; at the same time, the setting of the air inlet chamber, the air inlet silencer box, and the filter silencer box can also effectively reduce the noise of the vacuum pump during operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the vacuum pump silencing device of the present invention;

[0016] Figure 2 It is a 3D view of the air intake muffler box;

[0017] Figure 3 This is a schematic diagram showing the airflow direction in the intake silencer box;

[0018] Figure 4 This is a 3D view of the filter silencer box;

[0019] Figure 5 This is a structural diagram of a filter silencer box with the top and front panels removed.

[0020] Component designation explanation:

[0021] 1. Shell

[0022] 11 Rear side panel

[0023] 12 Right side panel

[0024] 13 Front side panel

[0025] 14. Left side panel

[0026] 15 First partition

[0027] 16 Second partition

[0028] 171 First Intake Chamber

[0029] 172 Second air intake chamber

[0030] 173 Main chamber

[0031] 2 Vacuum pump

[0032] 21 motors

[0033] 22 Pump body

[0034] 221 Air Inlet

[0035] 222 Exhaust port

[0036] 3. Intake silencer box

[0037] 31. Intake silencer enclosure

[0038] 32 Imports

[0039] 33 baffles

[0040] 331 First baffle

[0041] 332 Second baffle

[0042] 333 Third baffle

[0043] 34. Left side panel of the air intake muffler box

[0044] 35 Exports

[0045] 36 handles

[0046] 4. Filter silencer box

[0047] 41 Filter Silencer Box Panel

[0048] 411 Connecting hole

[0049] 412 filter holes

[0050] 42 Filter and silencer enclosure

[0051] 421 Inferior Chamber

[0052] 422 Upper Chamber

[0053] 43. Filter silencer box top plate

[0054] 44. Silencing plate

[0055] 45 Sound-absorbing cotton

[0056] 46. ​​Divider

[0057] 47 Mounting Plate

[0058] 5 silencers

[0059] 6 Electric valves Detailed Implementation

[0060] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0061] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0064] Figure 1 The diagram shown is a schematic representation of the internal structure of the vacuum pump silencing device of the present invention. In the following description, it will be referred to as... Figure 1 The attached diagram serves as a reference for direction. Figure 1In the diagram, the direction perpendicular to the view paper and facing outwards is the upward direction, the direction perpendicular to the view paper and facing inwards is the downward direction, the direction along the view paper and upwards is the backward direction, the direction along the view paper and downwards is the forward direction, the direction along the view paper and to the right is the right direction, and the direction along the view paper and to the left is the left direction.

[0065] The following is a specific embodiment of the vacuum pump silencing device with heat dissipation function provided by the present invention:

[0066] like Figure 1 As shown, the vacuum pump silencing device includes a housing 1, which is a box-like structure comprising a rear side plate 11, a right side plate 12, a front side plate 13, a left side plate 14, a bottom plate, and a top plate. After removing the top plate, the operator can adjust the internal structure of the housing 1. A first partition 15 and a second partition 16 are vertically connected within the housing 1. The right end of the first partition 15 is connected to the right side plate 12, and the front and rear ends of the second partition 16 are connected to the front side plate 13 and the rear side plate 11, respectively. The first partition 15 and the second partition 16 divide the interior of the housing 1 into a main chamber 173, a first air inlet chamber 171, and a second air inlet chamber 172. The vacuum pump 2 is located in the main chamber 173. The vacuum pump 2 includes a motor 21 and a pump body 22. The pump body 22 has an air inlet 221 and an air outlet 222. The air inlet 221 is connected to other equipment located outside the housing 1, while the air outlet 222 is connected to the atmospheric environment or other equipment located outside the housing 1. When vacuum pump 2 is working, the motor shaft of motor 21 drives the rotor to rotate, continuously discharging the gas drawn from inlet 221 from outlet 222, creating the required negative pressure. To aid in heat dissipation of motor 21, the tail end of motor 21 is connected to the first inlet chamber 171. The first inlet chamber 171 is equipped with an inlet hole or port that communicates with the outside. External air must enter motor 21 through the first inlet chamber 171 and then exit through outlet 222. The first inlet chamber 171 extends the airflow path, reducing noise generated by airflow and improving the sound insulation performance of the main chamber 3. Similarly, the main chamber 173 is connected to the outside through the second inlet chamber 172. The second inlet chamber 172 extends the airflow path, helping to reduce noise generated when airflow enters the main chamber 173 and improving the sound insulation performance of the main chamber 3.

[0067] like Figure 1 , Figure 4 and Figure 5As shown, the vacuum pump silencing device also includes an electric valve 6, a silencing pipe 5, and a filter silencing box 4, which are disposed in the main chamber 173 and sequentially connected to the air inlet 221. The filter silencing box 4 includes a mounting plate 47, a filter silencing box body 42, and a filter silencing box top plate 43 arranged sequentially from bottom to top. The mounting plate 47 is used to fix the filter silencing box 4 to the bottom plate of the housing 1. The filter silencing box top plate 43 is detachably connected to the filter silencing box body 42, which facilitates the operator to maintain and replace the filter silencing box body 42. The filter silencing box body 42 includes three side walls (i.e., the rear side wall, the right side wall, and the front side wall) and a filter silencing box panel 41 covering the left side of the filter silencing box body 42. The inner sides of the three side walls are provided with silencing perforated plates 44 and silencing cotton 45. Meanwhile, the filter silencer box 42 is also equipped with a partition plate 46, which divides the filter silencer box 42 into a lower chamber 421 and an upper chamber 422 distributed from bottom to top. The filter silencer box panel 41 is provided with multiple filter holes 412 that communicate with the lower chamber 421, and a connection hole 411 that communicates with the upper chamber 422. The connection hole 411 is used to connect the silencer pipe 5 and the upper chamber 422.

[0068] The working principle of this embodiment is as follows: When the electric valve 6 is opened, the vacuum pump 2 not only draws gas from the air inlet 221, but also draws gas from the main chamber 173, so that a negative pressure environment is quickly formed in the main chamber 173. A part of the external air will enter the motor 21 from the first air inlet 171 under the action of atmospheric pressure, and another part of the external air will enter the main chamber 173 from the second air inlet 172 under the action of atmospheric pressure. Some of the impurities are filtered out of the filter silencer box 4 by the filter hole 412, and another part of the impurities are blocked by the partition plate 46 and fall into the lower chamber 421. The clean gas with the impurities removed rises into the upper chamber 422, passes through the connection hole 411, the silencer pipe 5, and the electric valve 6 in sequence, enters the pump body 22, and is finally discharged from the air outlet 222. During this process, a large amount of external air flows into the main chamber 173 and carries away the heat generated during the operation of the vacuum pump 2, thereby cooling the vacuum pump 2. This design reduces additional power consumption, protects the vacuum pump 2, and extends its service life. The electric valve 6 can be an electric ball valve or an electric butterfly valve.

[0069] To further reduce the noise generated when external air flows into the second air intake chamber 172, this embodiment preferably includes an air intake silencer box 3 in the second air intake chamber 172. For example... Figure 1-3As shown, the intake muffler box 3 includes an intake muffler box body 31, an inlet 32 ​​located on the front or right side of the intake muffler box body 31, an outlet 35 located on the left side plate 34 of the intake muffler box body, and three baffles 33 staggered within the intake muffler box body 31. The second intake chamber 172 has an air inlet or air outlet communicating with the outside, and an air outlet or air outlet communicating with the main chamber 173. The inlet 32 ​​communicates with the outside of the housing 1 through the air inlet or air outlet, and the outlet 35 communicates with the main chamber 173 through the air outlet or air outlet. The aforementioned "staggered arrangement" specifically means that in two adjacent baffles 33, one is connected to the bottom of the intake muffler box body 31 and has a gap between it and the top of the intake muffler box body 31, while the other is connected to the top of the intake muffler box body 31 and has a gap between it and the bottom of the intake muffler box body 31. The outlet 35 is located near the baffle 33 furthest from the inlet 32. When outside air enters the intake silencer housing 31 from the inlet 32, the airflow must successively bypass the first baffle 331, the second baffle 332, and the third baffle 333 before entering the main chamber 173 from the outlet 35. During this process, the airflow continuously collides with and changes direction with the baffles 33, lengthening the flow path, slowing down the flow velocity, and reducing noise. For easy maintenance and replacement, the top of the intake silencer housing 3 is also equipped with a handle 36, allowing operators to install and remove the intake silencer housing 3 after removing the top plate of the housing 1.

[0070] Furthermore, this embodiment also includes a control system and a temperature sensor disposed in the main chamber 173. The temperature sensor and the electric valve 6 are respectively connected to the control system. When the temperature detected by the temperature sensor in the main chamber 173 is greater than a set value, the control system controls the electric valve 6 to open, initiating the cooling process. It should be noted that the form of the control system used in this embodiment is not limited; it can be a PLC controller or a microcontroller. Since these are all existing technologies, they will not be described in detail here.

[0071] Those skilled in the art can adjust the positions of the first air intake chamber 171 and the second air intake chamber 172 in the housing 1 as needed, taking care to keep the first air intake chamber 171 close to the motor 21.

[0072] The present invention also provides a cutting bed, including the vacuum pump silencing device, the adsorption platform, and the air extraction hole formed on the adsorption platform as described in the foregoing embodiments. The air inlet 221 and the air extraction hole are connected by a connecting pipe. It also includes a vacuum sensor mounted on the adsorption platform and a frequency converter connected to a motor 21, the frequency converter controlling the motor 21 to achieve variable frequency operation. Both the vacuum sensor and the frequency converter are connected to the control system.

[0073] The working principle of the above-mentioned cutting machine is as follows:

[0074] Based on the vacuum negative pressure value set by the control system, the control system transmits a signal to the frequency converter and controls the vacuum pump to start working. The control system, based on the detection results of the temperature sensor and vacuum sensor, uses a PID algorithm to control the opening and closing of the electric valve 6 and the operating parameters of the motor 21. When the temperature detected by the temperature sensor exceeds the set value, the control system opens the electric valve 6 to begin cooling the vacuum pump 2. During the cooling process, if there is air leakage at the extraction port, the control system will determine whether to prioritize closing the electric valve 6 based on the detection results of the vacuum sensor and temperature sensor. If the required vacuum level is still not achieved after closing the electric valve 6, the control system instructs the frequency converter to increase the operating frequency.

[0075] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A vacuum pump silencing device with heat dissipation function, comprising a housing and a vacuum pump disposed within the housing, the vacuum pump comprising a motor and a pump body, the pump body having an air inlet and an air outlet, characterized in that, The housing is provided with a main chamber, a first air inlet chamber and a second air inlet chamber. The vacuum pump is located in the main chamber. The air inlet and air outlet are both connected to the outside. The motor is connected to the outside through the first air inlet chamber. The main chamber is connected to the outside through the second air inlet chamber. An electric valve and a filter silencer box are installed in the main chamber and are connected to the air inlet in sequence. The filter silencer box has a lower chamber and an upper chamber arranged from bottom to top. The side wall of the lower chamber is provided with multiple filter holes. The upper chamber is connected to the electric valve. The electric valve and the filter silencer box are connected by a silencer pipe; The filter silencer box includes a filter silencer box body and a filter silencer box panel covering the filter silencer box body. The filter silencer box body is provided with a partition plate, and the lower chamber and the upper chamber are located below and above the partition plate, respectively. The filter silencer box panel has a connection hole and a plurality of filter holes, and the upper chamber is connected to the silencer pipe through the connection hole; The second air intake chamber is provided with an air intake silencer box, which includes an air intake silencer box body, an inlet and an outlet opened on the air intake silencer box body, and three baffles arranged alternately in the air intake silencer box body. The inlet is connected to the outside, and the outlet is connected to the main chamber. After the outside air enters the intake silencer box through the inlet, the airflow passes by the first baffle, the second baffle and the third baffle in sequence, and enters the main chamber from the outlet. This causes the airflow to continuously collide with the baffles and change direction, which lengthens the flow path, slows down the flow speed and reduces the noise. A temperature sensor is installed in the main chamber. The temperature sensor and the electric valve are respectively connected to the control system. When the temperature in the main chamber detected by the temperature sensor is greater than the set value, the control system controls the electric valve to open and start the cooling process.

2. The vacuum pump silencing device of claim 1, wherein, The side wall of the filter silencer box is also equipped with a sound-absorbing perforated plate and sound-absorbing cotton.

3. The vacuum pump silencing device according to claim 1, characterized in that, The intake muffler box is also equipped with a handle.

4. A cutting bed, characterized in that, Includes a vacuum pump silencing device as described in any one of claims 1-3.

5. The cutting bed according to claim 4, characterized in that, It includes an adsorption platform, the adsorption platform is provided with an air extraction hole, and the air inlet is connected to the air extraction hole.

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