JP4099335B2 - Air pump device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air pump device in which noise generated from an air pump is reduced from leaking to the outside.
[0002]
[Prior art]
As conventional techniques related to the present invention, an air pump main body that discharges air, an intermediate plate that is fixed via a fixing elastic body so as to place the air pump main body, an air passage that receives discharge air from the air pump main body, and discharge air An air pump device comprising a lower casing having a discharge pipe for discharging air, and an upper casing formed so as to cover the air pump main body so as to coincide with the lower casing, with the lower side opened and the upper side closed An air pump device is known in which a sound-insulating case is fixed to the middle plate or the lower casing so as to cover the air pump main body inside the upper casing (Japanese Patent Laid-Open No. 2001-329955).
[0003]
[Problems to be solved by the invention]
Conventionally, an air pump is often used as a drive source in a specimen testing apparatus. Air sucked or discharged from an air pump is used for aspiration of a specimen sample, transfer of a specimen sample, a valve for controlling them, and the like.
[0004]
A piston type air pump is often used as an air pump for a specimen testing apparatus. The piston-type air pump includes an AC motor and a piston connected to the AC motor, and is driven by an AC power source to reciprocate the piston, thereby sucking and discharging air.
[0005]
An air pump configured to suck and discharge air by such reciprocating motion has high vibration and noise levels. The air pump unit is fixed by a spring product having a vibration isolation structure as a vibration prevention measure. As a noise reduction measure, the air pump part is covered with a box body with a sound absorption sponge having a high transmission loss attached inside, thereby preventing sound from being transmitted to the outside.
[0006]
However, since waste heat generated by driving the air pump body is trapped inside the box, it has been necessary to discharge the waste heat to the outside of the box by a fan or the like. Therefore, there is a problem that sound leaks when exhausting waste heat even if it is covered with a box. For this reason, it is necessary to attach a soundproof duct or the like to the discharge part, which is expensive and the transmission loss increases only slightly.
[0007]
An object of the present invention is to provide an air pump device that is inexpensive and can further reduce the noise value.
[0008]
[Means for Solving the Problems]
An air pump device for a sample testing device according to the present invention is an air pump device for a sample testing device used as a drive source of the sample testing device, and includes an air pump main body for sucking and discharging air, and the air pump main body via a fixing elastic body. An air pump device comprising: a first intermediate plate mounted; a second intermediate plate above the air pump main body; and a box body partitioned by the first intermediate plate and the second intermediate plate. A first layer room partitioned by a box and the first middle plate, a second layer room partitioned by the first and second middle plates, and a box and second middle plate. A third layer room, the first layer room and the third layer room each have an air port to the outside, and a fan for exhausting the waste heat of the air pump body to the outside of the box directly, either with one of the first middle plate and the second intermediate plate, the full Ting with the installed the silencing member so as to be positioned between said air inlet, characterized in that discharged from the air outlet of air through the silencing member from the fan. Here, the first intermediate plate and the second intermediate plate can be formed of an iron plate, but may be formed of an aluminum plate. Further, the fixing elastic body may be composed of a vibration-proof rubber, or preferably a spring.
[0009]
It is preferable that the air pump device of the present invention further includes a sound deadening member on the upper surface of the first intermediate plate, the lower surface of the second intermediate plate, and the inner side of the box.
[0010]
Moreover, it is preferable that the sound deadening member is a sound absorbing sponge.
[0011]
Preferably, the first intermediate plate is provided with a second fan, and the second intermediate plate is provided with a first fan. Furthermore, the second fan supplies air between the first intermediate plate and the second intermediate plate, and the first fan It is preferable to have a function of discharging air from between the first intermediate plate and the second intermediate plate.
[0012]
【Example】
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. This does not limit the invention.
[0013]
FIG. 1 is a front view of the air pump device according to the present invention with the U-shaped cover removed, and FIG. 2 is a side view of the air pump device with the U-shaped cover removed. The air pump device is integrally formed with a U-shaped cover (not shown) and the casing 1 to form a box. A sound absorbing sponge is affixed to the inside of the U-shaped cover, and sound absorbing sponges 2 and 3 are also affixed to the housing 1 to form a box and constitute a soundproof wall.
[0014]
The housing 1 is attached from the middle plate 4 and the middle plate 5 so as to be divided into three rooms, and has a three-layer structure. Hereinafter, a layer formed above the intermediate plate 4 is a first layer chamber, a layer formed between the intermediate plate 4 and the intermediate plate 5 is a second layer, and a layer formed below the intermediate plate 5. Is called the third layer room.
A sound absorbing sponge 6 is attached to the lower surface of the intermediate plate 4, and a sound absorbing sponge 7 is attached to the upper surface of the intermediate plate 5. A sound absorbing sponge 7 is cut into a disk shape, and a coil spring 9 is fitted between a disk (not shown) directly attached to the middle plate 5 and a disk 8 attached to the air pump body 11. Since the air pump body 11 is fixed via the intermediate plate 5 and the coil spring 9, the vibration of the air pump body 11 can be attenuated, and the vibration noise generated from the air pump body 11 can be reduced. Further, noise from the air pump main body 11 is hardly leaked to the outside due to the air pump main body 11 being located in the second layer room and the sound absorbing sponge around the air pump main body 11.
[0015]
The air pump main body 11 includes two air pumps, a compressed air manufacturing air pump 12 that manufactures compressed air and a negative pressure manufacturing air pump 13 that manufactures negative pressure air. A tube 16 is attached to the compressed air production air pump 12 via a nipple 15 attached to the air discharge port 14. The tube 16 is divided into two flow paths of a tube 17 and a tube 18 by a branching member 19, the tube 17 is connected to a pressure adjusting unit 31, and the tube 18 is connected to a compressed air supply port 32 to supply compressed air. The negative pressure production air pump 13 has a tube 20 via a nipple (not shown: back side of FIG. 1) attached to an air suction port (not shown: back side of FIG. 1) at a position facing the air discharge port 14. Is attached. The tube 20 is connected to the negative pressure air supply port 33 (FIG. 2) and supplies negative pressure air. Since the compressed air supply port 32 and the negative pressure air supply port 33 are provided outside through the first layer chamber, noise from the air pump body 11 is difficult to leak directly to the outside.
[0016]
In order to exhaust the waste heat generated from the air pump main body 11, the fan 21 is directly attached to the middle plate 4 and the fan 22 is directly attached to the middle plate 5 with the air pump main body 11 as a center. The middle plate 4 and the sound absorbing sponge 6 are notched according to the shape of the fan 21, and the middle plate 5 and the sound absorbing sponge 7 are notched according to the shape of the fan 22. A sound absorbing sponge 23 is attached to the fan 21, and a sound absorbing sponge 24 is attached to the fan 22. The fan 21 takes in air from the air inlet 25 of the first layer room and supplies air to the air pump main body 11 via the sound absorbing sponge 23, and the fan 22 is an air outlet 26 opened in the third layer room. Then, air containing waste heat is discharged through the sound absorbing sponge 24. Since the air intake port 25 is provided in the first layer room and the air exhaust port 26 is provided in the third layer room, the noise from the air pump main body 11 installed in the second layer room is reduced to the first layer room. Since the sound is reduced in the third layer room, it is difficult to leak directly to the outside. Further, the sound absorbing sponge 23 in contact with the fan 21 and the sound absorbing sponge 24 in contact with the fan 22 absorb the noise of the air pump main body 11, making it difficult for the sound to leak to the outside.
[0017]
The housing 1 is provided with an outlet 27 for supplying electricity to the power supply unit of the air pump main body 11 and a signal cable 28 for sending a signal for controlling the air pump main body via a third layer room. Therefore, noise from the air pump main body 11 is reduced in the third layer room, so that it is difficult to leak directly to the outside.
[0018]
【The invention's effect】
In the present invention, the box body has a three-layer structure, the air pump main body is installed in the central layer (room), and noise from the air pump main body is not leaked directly to the outside from the central layer (room). It became possible to obtain an air pump device with a low level.
[Brief description of the drawings]
FIG. 1 is a front view of an air pump device of the present invention.
FIG. 2 is a side view of the air pump device of the present invention.
[Explanation of symbols]
1 Housing 2, 3, 6, 7, 23, 24 Sound absorbing sponge 4, 5 Middle plate 8 Disc 9 Coil spring 11 Air pump body 12 Compressed air production air pump 13 Negative pressure air production air pump 16, 17, 18, 20 Tube 19 Branch Members 21 and 22 Fan 25 Air intake port 26 Air exhaust port 27 Outlet 28 Signal cable

Claims (5)

An air pump device for a specimen testing device used as a driving source for the specimen testing device,
An air pump main body for sucking and discharging air; a first intermediate plate on which the air pump main body is placed via a fixing elastic body; a second intermediate plate above the air pump main body; the first intermediate plate and the second intermediate plate; A box body partitioned by an intermediate plate,
A box is a first layer room partitioned by a box and the first middle plate, a second layer room partitioned by the first middle plate and the second middle plate, the box and the second It has a third layer room partitioned by a middle plate,
Each of the first layer room and the third layer room has an air outlet to the outside,
The fan for discharging the waste heat of the air pump body into the box outside directly, provided on one of the first middle plate and the second intermediate plate,
An air pump for a specimen testing apparatus , comprising: a silencer member installed so as to be positioned between the fan and the air port, and discharging air from the fan from the air port via the silencer member apparatus. The air pump device according to claim 1, further comprising a sound absorbing sponge on the upper surface of the first intermediate plate, the lower surface of the second intermediate plate, and the inside of the box. A first fan in the first middle plate, the air pump apparatus according to claim 1, further comprising a second fan in the second intermediate plate. The second fan has a function of supplying air taken from the air port of the third layer room between the first intermediate plate and the second intermediate plate, and the first fan supplies air between the first intermediate plate and the second intermediate plate. 4. The air pump device according to claim 3, further comprising a function of discharging through an air port of the first layer room. The pump apparatus according to claim 2, wherein the sound-absorbing sponge are notched to fit the shape of the fan.

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