JP2005230749A - Centrifuge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve the problem that temperature of cooling air is higher than ambient temperature of a centrifuge by 10°C to 20°C since the conventional centrifuge sucks-in a part of the cooling air of a driving motor, the inside of the controller 105 is cooled by the cooling air of high temperature and thereby really usable temperature rising extent toward absolute temperature of a plurality of exothermic parts disposed in the controller 105 becomes narrower, a measure of suppressing temperature rise by increase of cooling air flow quantity due to size increase of a cooling fan and size increase of the controller is necessary and consequently the controller 105 becomes larger. <P>SOLUTION: In the centrifuge of this invention, a duct for a controller cooling fan is provided at a front cover of the centrifuge. Thereby cooling efficiency is improved, the controller can be made thinner and the miniaturized centrifuge can be provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooling method for a control device of a centrifuge.

  FIG. 4 is a cross-sectional view of a conventional machine for cooling a conventional centrifuge control device. In the figure, 101 is a housing of a conventional machine, 104 is a front door, 107 is a rotor destruction prevention wall, and 105 is a control device arranged in the housing 101. 101a is a partition plate of the housing 101, 101b is an exhaust port of the centrifuge drive motor, 101c is a ventilation port on the back surface of the housing, and 101d is an exhaust port of the control device 105 on the back surface of the housing. Reference numeral 105 a denotes a cooling fan of the front-mounted control device 105.

  The ventilation port 101c on the rear surface of the housing serves both for external discharge from the exhaust port 101b of the drive motor and for taking in the cooling air of the control device 105. In order to obtain the noise reduction effect of the drive motor, a certain distance is provided between the position of the exhaust port 101b of the drive motor and the ventilation port 101c on the rear surface of the housing. In order to obtain the noise reduction effect of the cooling fan 105a, the cooling air is taken in from the ventilation port 101c on the rear surface of the housing without providing the cooling air intake for the control device 105 in the front part. 104d is a radiator air passage forming wall for completely partitioning the upper part of the control device 105 and the rotor destruction prevention wall 107 and the lower part of the radiator.

  In the control device configured as described above, the flow of cooling air will be described. The exhaust of the drive motor discharged from the exhaust port 101b passes through the air path formed between the rotor destruction protection wall 107 and the back surface of the housing 101, and a part of the exhaust is from the ventilation port 101c on the back surface of the housing. A part of the exhaust is discharged to the outside and becomes cooling air for the control device 105 via an air passage formed between the rotor destruction prevention wall 107 and the side surface of the housing 101. The cooling air of the control device 105 becomes cooling air from the ventilation port 101c on the rear surface of the housing through the air passage between the rotor destruction prevention wall 107 and the side surface of the control device 105, and is also a drive motor discharged from the exhaust port 101b. Exhaust air becomes cooling air via the air passage between the rotor destruction prevention wall 107 and the side plate of the housing 101 and merges at the front surface of the control device 105 to become cooling air for the control device 105.

  The cooling air of the control device 105 generated by the cooling fan 105a is a part of the exhaust whose temperature has risen from the exhaust port 101b of the drive motor due to the cooling of the centrifuge drive motor, and the ventilation port 101c on the rear surface of the housing From the outside of the centrifuge, the air is introduced at an ambient temperature and becomes a cooling air in which two types of air are mixed. The cooling air passes through the controller 105 while cooling a plurality of heat generating components, and is discharged from the exhaust port 101d on the back of the centrifuge.

JP 2000-93847 A

  However, in the configuration of the cooling air path in the control device 105 disposed in the conventional centrifugal separator, the cooling air of the control device 105 generated by the cooling fan 105a is supplied from the exhaust port 101b of the drive motor to the centrifuge driving motor. This is a part of the exhaust gas whose temperature has been increased by the cooling of the air, and is an inlet air having an ambient temperature from the outside of the centrifuge through the ventilation port 101c on the rear surface of the housing, and becomes a cooling air in which two types of air are mixed. Therefore, the cooling air has a temperature 10 to 20 ° C. higher than the ambient temperature of the centrifuge. If the inside of the control device 105 is cooled with high-temperature cooling air, the range of the actual use temperature rise with respect to the absolute temperature of the plurality of heat generating components arranged in the control device 105 becomes narrow, and the size of the cooling fan and the control device are increased. Therefore, measures such as suppressing the temperature rise by increasing the cooling air volume due to the increase in the size of the control apparatus 105 have become necessary, and the control device 105 has become large.

  The present invention solves the above-described conventional problems, and provides a centrifugal separator that is improved in cooling efficiency and reduced in size by reducing the thickness of a control device.

  In order to solve the above problems, the centrifuge of the present invention is provided with the control device cooling fan duct inside the front cover of the centrifuge, thereby improving the cooling efficiency and reducing the thickness of the control device. A centrifugal separator is provided.

  According to the present invention, by providing the control device cooling fan duct in the front cover of the centrifuge, the cooling air at the ambient temperature is directly taken in from the outside of the centrifuge and the control device is cooled. Wide range of increase in actual use for multiple heat generating component absolute temperatures can be used. Therefore, the cooling efficiency can be improved and the control device can be thinned and miniaturized.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a centrifuge of the present invention, FIG. 2 is a front view with a front cover removed, FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. In the figure, a centrifuge 1 is a casing, 2 is an opening / closing door, 3 is a liquid crystal display device, 4 is a front cover, 5 is a control device, 6 is a radiator, and 7 is a rotor destruction prevention wall.

  1a is a partition plate for partitioning the upper part of the control device 5 and the rotor destruction prevention wall 7 and the lower part of the radiator 6, 1b is a centrifuge drive motor exhaust port, 1c is the centrifuge drive motor exhaust to the outside of the centrifuge An exhaust port 1d for discharging is an exhaust port of the control device 5. A cooling fan duct 4a is provided on the inner surface of the front cover 4, 4b is provided with a cooling fan duct lower inlet, and 4c is provided with a cooling fan duct upper outlet. 4d is an air passage forming wall for the radiator 6 for completely partitioning the upper part of the control device 5 and the rotor destruction prevention wall 7 and the lower part of the radiator 6.

  5a is a cooling fan attached to the front surface of the control device. The position of the opening of the cooling fan 5 is the same as the position of the cooling fan duct upper outlet 4c so that the cooling air flows without resistance. The fan duct lower inlet 4b and the fan duct upper outlet 4c have substantially the same area, and the cooling air flows without resistance.

  Next, the flow of the cooling air will be described for the cooling of the control device having the above configuration. The cooling air generated by the cooling fan 5a attached to the front surface of the control device 5 is first sucked from the fan duct lower inlet 4b, and the cooling air at the ambient temperature of the centrifuge is passed through the air passage in the cooling fan duct 4a. It flows from the upper outlet 4c to the cooling fan 5a. The cooling air having the ambient temperature passes through the cooling fan 5a while cooling a plurality of heat generating components in the control device 5, and is discharged to the outside from the exhaust port 1d on the back of the centrifuge.

  Exhaust gas from the drive motor exhaust port 1 b passes through the air passage surrounded by the back surface of the housing 1 and the rotor defense wall 7 and is discharged to the outside through the exhaust port 1 c. As described above, according to the present embodiment, the cooling efficiency inside the control device 5 is increased by sending the cooling air at the ambient temperature of the centrifuge from the cooling fan duct 4a provided in the front cover 4 into the control device 5. The cooling fan 5a can be reduced in size and the control device 5 can be reduced in thickness.

The front view which shows one Embodiment of the centrifuge which is this invention Front view with front cover removed AA sectional view of FIG. Front cover cross section Cross section of conventional machine

Explanation of symbols

1 is a housing, 2 is an opening / closing door, 3 is a liquid crystal display device, 4 is a front cover, 5 is a control device, 6 is a radiator, 7 is a rotor destruction barrier, 1a is a partition plate, 1b is a drive motor exhaust port, 1c Exhaust port, 1d is an exhaust port of the control device 5, 4a is a cooling duct, 4b is a cooling fan duct lower inlet, 4c is a cooling fan duct upper outlet, 4d is an air passage forming wall for the radiator 6, 5a is a cooling fan, 101 is A housing of a conventional machine, 104 is a front cover, 107 is a rotor destruction prevention wall, 105 is a control device, 101a is a partition plate of the housing 101, 101b is an exhaust port of a centrifuge drive motor, 101c is a ventilation port, and 101d is An exhaust port of the control device 105, 104d is a radiator air passage forming wall, and 105a is a cooling fan.

Claims (3)

A centrifuge provided with a motor for rotating a rotor and a control device for controlling the motor, wherein the control device cooling fan duct is provided inside a front cover of the centrifuge. 2. The centrifugal separator according to claim 1, wherein the control device is forcedly air-cooled by a fan or the like, and has a structure in which air is sucked from the front side through the duct of the front cover and discharged backward. The centrifuge according to claim 1 or 2, wherein the duct of the front cover has an opening on the lower side of the front cover.

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