JP5077292B2 - centrifuge - Google Patents

Description

  The present invention relates to a centrifuge capable of effectively removing condensed water adhering to a wall surface of a rotor chamber and condensed water generated around a compressor when the rotor chamber is cooled.

  In a centrifuge, since the rotor temperature rises due to windage and the sample inside may be denatured when the rotational speed of the rotor is increased, the rotor chamber is cooled to a low temperature, for example, 4 ° C. Centrifugal separators that perform centrifugal separation are widely used. The operation time associated with the centrifugal operation varies from a short time of several minutes to several hours. When the centrifugal operation is completed and the rotor chamber door is opened, outside air flows into the rotor chamber. At this time, depending on the temperature and humidity of the surrounding outside air, since the water is cooled below the dew point, water vapor in the rotor chamber may condense and adhere to the wall surface of the rotor chamber.

  If condensed water is attached to the wall of the rotor chamber, the cooling capacity is reduced and the original performance cannot be achieved. Therefore, a centrifuge equipped with a cooling device is connected to the rotor chamber through a drain hose. Cap the hose outlet, or prepare a container to serve as a receiving tray at the drain hose outlet so that the condensed water can be discharged outside the machine. Such a conventional centrifugal separator is known from Patent Document 1, and such a conventional structure will be described with reference to FIGS.

  FIG. 8 is a cross-sectional view of a conventional centrifuge, and FIG. 9 is a rear view of the conventional centrifuge with the cabinet made of structural steel sheet metal and the discharge cover removed covering the side, side and top of the main body. It is the perspective view seen from. The centrifuge 101 includes a housing 2, a rotor chamber 4 that houses the rotor 3, a motor 5 that rotationally drives the rotor 3, a door 6 that opens and closes the upper surface opening of the rotor chamber 4, and the like. The rotor chamber 4 is constituted by a chamber 7 whose upper surface is open, and a refrigerant pipe 8 made of a copper pipe is wound around the rotor chamber 4, and the circumference is covered with a heat insulating material 9 such as a foam material. A portion of the chamber 7 through which the motor 5 passes is covered with an opening by a seal cover 10 made of an elastic material such as rubber.

  The motor 5 is elastically supported via a vibration-proof rubber 12 at a position where the output shaft 5 a protrudes from an upper part of a partition plate 11 installed horizontally in the housing 2. The output shaft 5 a extends through the chamber 7 from below and into the rotor chamber 4. The rotor 3 is detachably attached to the upper end of the output shaft 5a. A front cover 19 is attached in front of the centrifuge 101, and a display device 16 for displaying the rotational speed of the motor 5 and the like is provided on the front cover 19. Further, a control device 27 is disposed inside the front cover 19. The control device 27 performs overall control of the centrifuge 101 including rotation control of the motor 5 and cooling control of the cooling device.

  A cooling device 20 is accommodated in the space behind the rotor chamber 4. The cooling device 20 includes a compressor 13, a condenser 14, a capillary tube 15 as expansion means, and a refrigerant pipe 8 as an evaporator. In the cooling device 20, the high-pressure gas refrigerant compressed by the compressor 13 is condensed and liquefied by the condenser 14, and then decompressed and expanded when passing through the capillary tube 15. Then, it evaporates in the process of flowing through the refrigerant pipe 8 arranged on the outer periphery of the chamber 7, and heat in the chamber 7 is taken away by the evaporation of this refrigerant. As a result, the rotor chamber 4 is cooled, and heat generated by the high-speed rotation of the rotor 3 in the rotor chamber 4 is suppressed.

  The fan 17 is a fan for discharging heat generated in the centrifuge 101. As the fan 17 rotates, air is sucked from the front side of the motor 5, passes through the motor 5, cools the motor 5, and passes through the fan 17. The air discharged from the fan 17 flows around the compressor 13 (mainly left and right), passes through the condenser 14, passes through the hole formed in the discharge cover 131, and is discharged outside the machine. The discharge cover 131 is a structural steel sheet metal member attached to the back surface of the centrifuge 101, and has a large number of ventilation holes in the vertical and horizontal directions having the same elongated hole shape.

  In the centrifugal separation operation, the interior of the rotor chamber 4 is cooled by a cooling device, and when the door 6 is opened after cooling and the rotor chamber 4 is exposed to the outside air, the water vapor in the chamber of the rotor 4 is dewed below the dew point. Condensed water may adhere to the surface. In order to discharge the condensed water to the outside of the room, a through hole is provided in the lower portion of the rotor chamber 4, and a drain hose 121 made of transparent vinyl chloride or the like is connected thereto. A cap 122 made of polyvinyl chloride or the like is attached to the drain port of the drain hose 121 so that the condensed water does not drip outside the room. Although not shown, a centrifuge that prepares a container that becomes a plastic tray near the discharge port of the drain hose 121 is also known.

  In such a centrifuge 101, an operator discards the condensed water accumulated in the drain hose 121 before and after operation or during maintenance inspection. It is preferable to perform the disposal work periodically. The procedure for discarding the condensed water will be described with reference to FIG. Open the door 6, lift the centrifuge 101 slightly, remove the drain hose 121 on the bottom from the clamp 123, and pull the drain hose 121 to the side of the centrifuge 101. Next, the cap 122 at the tip of the drain hose 121 is removed, and the water accumulated in the drain hose 121 is put into a drain receiver such as a beaker. In order to complete drainage, the door 6 is left open until there is no condensed water. When the condensed water is discarded, the cap 122 at the tip of the drain hose 121 is attached, and the drain hose 121 is returned to the original position.

JP-A-8-141438

  Since the work of regularly dew condensation water is time-consuming work, some workers do not perform it regularly. In the worst case, the water accumulated in the drain hose 121 flows back into the rotor chamber 4 and travels through the output shaft 5a of the motor 5 if it is repeatedly operated without being discarded or left as it is. It may enter the inside of the motor 5 and cause rusting or failure. Further, when a tray (not shown) is prepared and the drainage is received by the tray, the water may overflow and spill out to the periphery.

  On the other hand, as a phenomenon different from the dew condensation water flowing through the drain hose, the dew condensation water may be attached to a part of the pipe between the refrigerant pipe (evaporator) 8 for cooling the rotor chamber 4 and the compressor 13. When the water droplet falls, it accumulates in the bottom surface of the centrifuge housing 2 and may cause rust.

  As a countermeasure for these, receive the drainage and water droplets mentioned above in the tray, change the direction of the fan and the air path to the downward direction with the tray, so that the hot air directly hits the drainage accumulated in the tray, It is conceivable to quickly vaporize the waste water. However, exhaust heat stagnates at the bottom, so that the interior of the machine is not exhausted sufficiently, and the temperature inside the centrifuge increases greatly, which may cause a problem of insufficient cooling in the rotor chamber. Further, adding a downward fan with a saucer not only requires a space for inserting the fan, but also increases the noise caused by the fan and consumes extra power.

  Condensed water dripped from the compressor can be discharged out of the machine by making a hole in the lower part of the compressor of the base of the casing and received by a tray, but the drain hose 121 from the rotor chamber 4 is opened. If it is received by the tray, the inside of the rotor chamber 4 communicates with the outside during cooling of the rotor chamber 4 by the cooling device and rotation of the rotor chamber 4, which is not preferable. That is, there are problems that the cooling effect is reduced, the occurrence of dew condensation inside becomes large, and the rotor chamber 4 becomes negative pressure due to rotation of the rotor 3 and air is sucked in from the outside through the drain hose 121. It is. Furthermore, if the interior of the rotor chamber 4 remains in communication with the outside, a loud noise may be generated when the rotor 3 rotates.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a centrifugal separator capable of quickly removing condensed water generated in a rotor chamber or around a compressor.

  Another object of the present invention is to provide a centrifugal separator capable of evaporating condensed water generated in a rotor chamber or around a compressor.

  Still another object of the present invention is to provide a centrifuge capable of effectively draining and evaporating condensed water by simply adding a simple mechanism without changing the basic structure of the centrifuge. There is to do.

  The characteristics of representative ones of the inventions disclosed in the present application will be described as follows.

 According to one aspect of the present invention, a rotor, a motor that rotates the rotor, a rotor chamber that houses the rotor, a cooling device that cools the rotor chamber, and a fan that exhausts exhaust heat generated in the machine to the outside. And a drain hose for discharging the condensed water in the rotor chamber to the outside in a centrifuge having a vent hole provided in the discharge port and collecting the drainage A saucer part was provided, the saucer part and the cover part were made of a highly heat-conductive material, and the saucer part and the cover part were connected and arranged. The tray portion and the cover are preferably manufactured by integral molding using a material of aluminum, copper, or zinc alloy.

  According to another aspect of the present invention, the cooling device includes a compressor and a condenser, and configures the tray portion to be disposed below the compressor. The condenser is arranged in the vertical direction, the cover part is formed so as to extend in the vertical direction in parallel with the condenser, and the cover part and the tray part are configured to be substantially vertical. In addition, a check valve is provided on the drain hose to prevent the backflow of condensed water discharged from the rotor chamber. Further, an electromagnetic valve may be provided instead of the check valve, and the drain hose may be closed when the motor rotates.

  According to still another feature of the present invention, a member having a capillary action is provided from the cover part to the tray part along the periphery of the vent hole of the cover part. As the member having a capillary action, a water-permeable nonwoven fabric or a continuous porous sponge can be used.

  According to the first aspect of the present invention, the drain hose is positioned at the lower part of the drain port, the tray part for collecting drainage is provided, the tray part and the cover part are made of the heat conductive material, and the tray part and the cover part are connected. Heat is transmitted from the cover part to the tray part by the heat conduction that is arranged, and natural evaporation of the drainage received by the tray can be promoted.

  According to invention of Claim 2, since the saucer part and the cover were integrally molded with the material of aluminum, copper, and a zinc alloy, the heat which rose by the exhaust heat with the discharge cover is easy to be transmitted to the saucer part which the position separated. Therefore, exhaust heat can be used efficiently.

  According to the invention of claim 3, since the tray portion is configured so that the tray portion is disposed at the lower portion of the compressor, the condensed water adhering to the compressor surface is discharged to the tray portion through the hole at the lower portion of the compressor, and It is possible to prevent water from collecting in the body and causing rusting.

  According to the invention of claim 4, the condenser is arranged in the vertical direction, the cover part is formed to extend in the vertical direction in parallel with the condenser, and the cover part and the tray part are configured to be substantially vertical. Therefore, warm air can be directly applied to the cover part, and the temperature rise of the cover part can be promoted.

  According to the invention of claim 5, since the check valve is provided in the drain hose to prevent the backflow of the condensed water discharged from the rotor chamber, the drain hose during the centrifugal separation work without providing a cap at the tip of the drain hose. Can be closed.

  According to the invention of claim 6, since the drain hose is provided with the electromagnetic valve and the drain hose is closed when the motor rotates, it is not necessary to provide a cap at the tip of the drain hose.

  According to the invention of claim 7, since the member having a capillary action is provided from the cover part to the tray part around the ventilation hole of the cover part, the waste water accumulated in the tray is nonwoven fabric or continuously porous by capillary action. The quality sponge absorbs and spreads upwards, and can directly receive warm air to promote natural vaporization.

  According to the invention of claim 8, since the member having a capillary action is a nonwoven fabric or a continuous porous sponge having water permeability, natural vaporization can be promoted only by adding an inexpensive material. An increase in manufacturing cost can be minimized.

  The above and other objects and novel features of the present invention will become apparent from the following description and drawings.

It is sectional drawing which looked at the centrifuge which concerns on this invention from the right side surface. It is the perspective view seen from the diagonal back of the centrifuge 1 of the state which removed the door 6, the cabinet 18, and the discharge cover 31. FIG. It is a perspective view of the discharge cover 31 of FIG. It is a perspective view which shows the discharge | emission cover 41 based on the 2nd Example of this invention. It is sectional drawing which shows the centrifuge 1a which concerns on the 3rd Example of this invention. It is a perspective view which shows the discharge cover which concerns on the 4th Example of this invention. It is sectional drawing of the discharge cover of FIG. It is sectional drawing which looked at the conventional centrifuge from the right side surface. It is the perspective view seen from diagonally back in the state which removed the door, cabinet, and discharge cover of the conventional centrifuge. It is a perspective view which shows the state at the time of carrying out regular dew condensation disposal of the conventional centrifuge.

  Embodiments of the present invention will be described below with reference to FIGS. In addition, the part of the same structure as the prior art demonstrated in FIGS. 8-10 attaches | subjects the same referential mark, and abbreviate | omits repeated description. The front and rear, left and right, and up and down directions of the main unit will be described with reference to directions indicated by arrows in FIGS.

  FIG. 1 is a cross-sectional view of a centrifuge according to the invention as seen from the right side, and FIG. 2 is a view from the rear of the centrifuge 1 with the door 6, the cabinet 18, and the discharge cover 31 removed. FIG. 3 is a perspective view of the discharge cover 31. 1, the basic structure of the centrifuge 1 is almost the same as the structure of the conventional example of FIG. 8, but here a cap (122 in FIG. 8) is attached to the tip 21a on the discharge side of the drain hose 21. 3 points are improved, that is, the check valve 24 is provided in the middle of the passage of the drain hose 21, and the structure of the discharge cover 31 is different. The discharge cover 31 is provided with a tray portion at the bottom, and the cover portion and the tray portion are integrally formed of a high heat conductive material.

  As shown in FIG. 2, the discharge cover 31 is fixed to the housing 2 and the cabinet 18 (see FIG. 1) by four screws 34 from the rear of the centrifuge 1. Since the cabinet 18 is made of a structural steel plate that covers the side surface and the upper surface of the main body, a heat insulating material 26 is provided between the casing 2 and the cabinet 18 and the discharge cover 31, and the temperature of the discharge cover 31 is determined by the casing. 2. It is prevented from being lowered by the cabinet 18. As shown in FIG. 1, the distal end 21 a of the drain hose 21 opens to the tray part 31 b of the discharge cover 31. In the present embodiment, the check valve 24 is provided, so that the rotor 3 rotates and the rotor chamber 4 becomes negative pressure, or the condensed water seems to flow backward. When this occurs, the passage is blocked by the check valve 24. By using the check valve 24, it is not necessary to provide a cap at the tip of the drain hose 21, and the tip (drain) of the drain hose 21 is hung just above the tray unit integrated with the discharge cover 31. Became possible.

  When the centrifuge 1 is operated in this state, the heat generated inside the centrifuge 1 is discharged by the fan 17 through the ventilation hole of the discharge cover 31 to the outside. At this time, since the warm air directly hits the discharge cover 31, the temperature of the discharge cover 31 rises. In the present embodiment, since the discharge cover 31 is integrally formed of a highly heat conductive material, heat is easily transmitted to the saucer portion 31b integrated with the cover portion 31a, so that the temperature of the saucer portion 31b rises and the saucer portion 31b rises. It is possible to promote natural vaporization of wastewater received at the site.

  FIG. 3 is a perspective view of the discharge cover 31 alone. The discharge cover 31 is mainly composed of two parts, a cover part 31a extending in the vertical direction and a tray part 31b extending in the horizontal direction. The discharge cover 31 is made of aluminum, copper, or zinc alloy having a higher thermal conductivity than that of a structural steel material that is generally used. The shape of the cover part 31 is substantially the same as that of the conventional discharge cover 131 (FIGS. 8 to 10), and a number of ventilation holes 31c having a long hole shape are formed in the vertical and horizontal directions at positions corresponding to the heat radiation portions of the condenser 14. The Four screw holes 31g for allowing the screws 34 to pass therethrough are formed in the peripheral portion of the cover portion 31a. In addition, four notches 31f formed to avoid screw positions for attaching the cabinet 18 to the condenser 14 are formed on the outer peripheral portion.

  The tray portion 31b of the discharge cover 31 is formed with a folded portion 31d whose front is folded upward by about 90 degrees, and a folded portion 31e which is folded upward by about 90 degrees is formed on both the left and right sides. It is formed, and it is comprised so that a certain amount of water can be stored in the saucer part 31b. In addition, the joint of the corner | angular part of the folding | returning parts 31d and 31e may be given the welding which fills a clearance gap. The discharge cover 31 can be manufactured, for example, by pressing a single metal plate, and can be manufactured at a relatively low cost. In addition, by manufacturing in an integrated configuration, the heat that has risen due to the exhaust heat in the cover portion 31a can be conducted well to the saucer portion 31b that is separated from the position, thereby promoting the evaporation of the wastewater accumulated in the saucer portion 31. it can. As described above, the waste heat accumulated in the tray part 31 is evaporated by efficiently using the exhaust heat discharged from the condenser 14, so that the operation of discarding the condensed water can be substantially eliminated.

  The length and width of the tray part 31 b are formed so as to be larger than the diameter of the compressor 13, and are arranged below the compressor 13. Further, a plurality of holes that allow water droplets to pass therethrough are formed in the base (floor plate portion) of the housing 2 and in the vicinity of the lower portion of the compressor 13. By comprising in this way, the dew condensation water adhering to a part of piping between the refrigerant | coolant piping (evaporator) 8 and the compressor 13 which cools the rotor chamber 4 flows into the saucer part 31b through the hole. In this way, not only the dew condensation water in the rotor chamber 4 is discharged, but also the dew condensation water adhering to a part of the pipe between the refrigerant pipe (evaporator) 8 for cooling the rotor room 4 and the compressor 13 can be effectively received. By guiding to the portion 31b, it is possible to prevent water from collecting in the housing 2 and causing rust.

  Furthermore, through the hole, a part of the exhaust heat that was blocked by the discharge cover and did not pass through the ventilation hole flows down to the tray, and the hot air directly hits the drainage accumulated in the tray. Natural vaporization can be promoted.

  FIG. 4 is a perspective view showing a discharge cover 41 according to the second embodiment of the present invention. The difference from the first embodiment shown in FIGS. 1 to 3 is that a nonwoven fabric 43 is provided on the inner surface of the discharge cover 41. As shown in FIG. 4, a member having a capillary action that is continuous in the vertical direction from the saucer portion 41 b along the ventilation hole 41 c on the surface (inner surface) of the exhaust cover 41 that receives exhaust heat, for example, a non-woven fabric 43 having water permeability. Alternatively, a continuous porous sponge is applied. The non-woven fabric 43 has a zigzag portion 43b that is a curved line that does not intersect with each other in the tray portion 41b, thereby increasing the surface area that absorbs drainage in the tray, and the cover portion 41a has a straight portion formed vertically. 43a is formed. By comprising in this way, the waste_water | drain collected in the saucer part 41b can be absorbed by a nonwoven fabric or a continuous porous sponge by a capillary phenomenon, spreads upwards, can receive a warm air directly, and can promote natural vaporization. Furthermore, after the operation is completed, natural vaporization continues for a while due to the residual heat of the saucer. By using exhaust heat, natural vaporization can be promoted without additional investment such as fans. It is possible to realize a centrifuge that eliminates the need to dispose of condensed water.

  FIG. 5 is a cross-sectional view showing a centrifuge 1a according to a third embodiment of the present invention. A difference from the first embodiment is an electromagnetic valve 25 arranged in the middle of the drain hose 21. By providing the electromagnetic valve 25, the electromagnetic valve 25 is closed only during the operation of the centrifuge 1a, and the electromagnetic valve 25 is opened when the centrifugal separation operation ends. By constituting in this way, it is possible to prevent the drainage of the drain hose 21 flowing back during the centrifugal separation and the generation of sound.

  FIG. 6 is a perspective view showing the shape of the discharge cover 51 according to the fourth embodiment, and FIG. 7 is a cross-sectional view of the discharge cover 51. The basic shape of the discharge cover 51 is the same as the discharge covers 31 and 41 of the first and second embodiments. However, in the present embodiment, a lid 55 is provided on the upper side of the tray part 51 b of the discharge cover 51. The lid 55 is preferably made of, for example, a synthetic resin such as plastic, and as shown in FIG. 7, a through hole 55a for allowing the drain hose 21 to pass through is formed in the central portion, and the trays on the front side and the side side are formed. A fitting portion 55b that fits with the peripheral edge of the portion 51b is formed. By adopting such a structure, it is configured so that water accumulated in the tray part 51b does not leak to the outside.

  A non-woven fabric 53 substantially the same as the non-woven fabric 43 of FIG. 4 is formed on the tray portion 51b of the discharge cover 51, and the non-woven fabric 53 extends upward and extends to the position of the uppermost ventilation hole 51c of the cover portion 51a. Is done. On the other hand, the nonwoven fabric 53 in the tray part 51b is arrange | positioned in the direction of the cover part 51a from the center part vicinity of the front-back direction of the tray part 51b. The length of the nonwoven fabric 53, the thickness of the nonwoven fabric 53, and how the nonwoven fabric 53 is arranged are determined according to the amount of drainage discharged from the centrifuge 1, the temperature and humidity at the place of use, etc. In consideration of the above, it may be set arbitrarily, and is not limited to the structure shown in the embodiment.

  The fourth embodiment provides the centrifugal separator 1 having a structure in which it is not necessary to consider the collection of condensed water adhering to a part of the pipe between the refrigerant pipe (evaporator) 8 for cooling the rotor chamber 4 and the compressor 13. By being configured in this way, it is possible to prevent the humidity at the bottom of the centrifuge 1 from increasing due to the influence of the drainage accumulated in the tray 51b of the discharge cover 51. In addition, when collecting the condensed water adhering to the compressor 13, the shape of the lid 55 is devised to make it a shape like a water collection tray, and the water collected on the upper surface of the lid 55 is collected in the tray 51 b. It may be configured to be guided.

  As is apparent from the above description, according to the present invention, by integrally forming the tray for collecting the drainage from the discharge cover and the drain hose with a high thermal conductivity material, heat is transmitted to the tray portion by heat conduction, It is possible to promote natural vaporization of the wastewater received.

  In addition, according to the present invention, part of the exhaust heat that is blocked by the discharge cover and does not pass through the ventilation hole flows to the tray, and natural air evaporation is promoted by directing warm air to the drainage accumulated in the tray. Can do. These natural vaporizations make effective use of the waste heat that has been thrown away until now, and are preferable from the viewpoint of ecology without fear of failure.

  Furthermore, according to the present invention, the heat of the exhaust cover is increased by exhaust heat by making the exhaust cover material made of aluminum, copper, or zinc alloy, which has better thermal conductivity than the structural steel materials generally used. However, it becomes easy to transfer heat to the saucer part where the position is distant, and exhaust heat can be used efficiently.

  As mentioned above, although demonstrated based on the Example which shows this invention, this invention is not limited to the above-mentioned Example, A various change is possible within the range which does not deviate from the meaning. For example, in the above-described embodiment, since it is not necessary for the operator to discard the water in the tray, the structure is such that it is not possible to see how much water has accumulated in the tray, but the amount of stored water is As can be confirmed, a known viewing window or some water level display means may be provided.

DESCRIPTION OF SYMBOLS 1 Centrifugal separator 2 Case 3 Rotor 4 Rotor chamber 5 Motor 5a (Motor) output shaft 6 Door 7 Chamber 8 Refrigerant piping 9 Heat insulating material 10 Seal cover 11 Partition plate 12 Antivibration rubber 13 Compressor 14 Condenser 15 Capillary tube 16 Display device 17 Fan 18 Cabinet 19 Front cover 20 Cooling device 21 Drain hose 21a (Drain hose) tip 22 Cap 24 Check valve 25 Solenoid valve 26 Heat insulating material 27 Controller 31 Discharge cover 31a (Discharge cover) cover 31b Drain part 31c (of the discharge cover) 31d, 31e (of the discharge cover) 31f (of the discharge cover) 31g (not of the discharge cover) Notch 31g (screw hole of the discharge cover) 33 Non-woven fabric 34 Screw 41 Cover part 41b (discharging cover) Chromatography of) saucer portion 41c (the outlet cover) ventilation holes 43 nonwoven 43a (nonwoven) of the linear portion 43 b (nonwoven) zigzag portion 51 outlet cover
51a (discharge cover) cover part 51b (discharge cover) tray part 53 non-woven fabric 55 lid 55a (lid) through hole 55b (lid) fitting part 101 centrifuge 121 drain hose 122 cap 123 clamp 131 discharge cover 134 screw

Claims (8)

A rotor, a motor that rotates the rotor, a rotor chamber that houses the rotor, a cooling device that cools the rotor chamber, a fan that discharges exhaust heat generated in the machine to the outside of the machine, and a discharge port In a centrifuge having a cover part in which ventilation holes are formed and a drain hose for discharging condensed water in the rotor chamber to the outside,
Located at the lower part of the drain hose outlet, provided with a tray part for collecting drainage,
The centrifuge is characterized in that the saucer part and the cover part are made of a heat conductive material, and the saucer part and the cover part are connected to each other.   The centrifuge according to claim 1, wherein the tray portion and the cover are integrally formed of a material of aluminum, copper, or zinc alloy. The cooling device includes a compressor and a condenser,
The centrifuge according to claim 1 or 2, wherein the saucer portion is configured so that the saucer portion is disposed below the compressor.   The condenser is arranged in a vertical direction, the cover part is formed to extend in the vertical direction in parallel with the condenser, and the cover part and the tray part are configured to be substantially vertical. The centrifuge of claim 3.   The centrifugal separator according to any one of claims 1 to 4, wherein a check valve is provided in the drain hose to prevent a backflow of condensed water discharged from the rotor chamber.   The centrifugal separator according to any one of claims 1 to 4, wherein an electromagnetic valve is provided in the drain hose, and the drain hose is closed when the motor rotates.   The centrifuge according to any one of claims 1 to 6, wherein a member having a capillary action is provided from the cover part to the tray part along the periphery of the ventilation hole of the cover part. .   The centrifugal separator according to claim 7, wherein the member having a capillary action is a water-permeable nonwoven fabric or a continuous porous sponge.

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