JP2008157179A - Scroll fluid machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool a fluid machine body, a connection part between the fluid machine body and an electric motor, and the electric motor. <P>SOLUTION: In this scroll fluid machine provided with the fluid machine body 1 and the electric motor 2 axially coupled to the driving shaft of the fluid machine body 1, one side of the fluid machine body 1 is provided with a blower 3 sending air toward the fluid machine body 1, the connection part between the fluid machine body 1 and the electric motor 2, and the electric motor 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a scroll fluid machine used as a scroll compressor, a scroll vacuum pump, or the like.

  A scroll fluid machine generally includes an orbiting wrap in an orbiting scroll in which an orbiting wrap is erected on an orbiting end plate pivotally supported via a bearing at an eccentric shaft portion of a drive shaft driven by an electric motor, and a fixed end plate. A stationary chamber is formed between the orbiting wrap and the stationary wrap by engaging the stationary wrap with the stationary wrap standing upright, and a rotation prevention mechanism is provided to prevent the orbiting scroll from rotating. Configured.

  Thus, by rotating the orbiting scroll eccentrically with the eccentric shaft portion of the drive shaft and the rotation prevention mechanism, the volume of the sealed chamber is gradually decreased in the centripetal direction according to the orbiting direction, or conversely in the centrifugal direction. By gradually increasing, the fluid sucked from the outer peripheral portion is guided to the central portion while being compressed, or the fluid sucked from the central portion is decompressed and discharged from the outer peripheral portion.

  In the scroll fluid machine as described above, not only the electric motor for driving but also the bearing portion of the drive shaft, the eccentric shaft portion integrated with the drive shaft, and usually three sets of cranks are provided during operation. The pin type anti-rotation mechanism, and the sliding contact part that contacts the facing surface of the tip seal fitted in the fitting groove at the tip of the fixed and swivel wrap generates heat, reducing the performance and reducing the service life of each part. Since these are shortened, it is necessary to effectively cool these parts so that the temperature does not rise above a certain level.

The air cooling method of the scroll fluid machine is roughly divided, as shown in Patent Document 1, a fan is attached to the output shaft of an electric motor connected to the fluid machine main body, and the fan is rotated by the electric motor so that the electric motor and its surroundings and fluid As shown in Patent Literature 2, fans that are rotated by an auxiliary electric motor different from the electric motor are disposed at both sides and the front side of the fluid machine main body, as shown in Patent Document 2, There is a method of sending wind toward the fluid machine main body by driving the electric motor.
JP 2001-123969 A JP-A-8-21392

  In the method described in Patent Document 1, it is possible to cool the motor to some extent by blowing air, but because the air whose temperature has risen due to the removal of heat from the motor is blown to the fluid machine body, Each part of the fluid machine main body cannot be cooled effectively.

  In the method described in Patent Document 2, since the cooling air is generated by using an auxiliary electric motor dedicated to the fan, it can be suitably blown to any location. In addition to this, three auxiliary electric motors and fans and their mounting structures are required, which is uneconomical and increases the size of the entire machine or apparatus. Moreover, in such a structure, the cooling air sent to each place interferes with each other, and there exists a problem that it is difficult to obtain desired cooling efficiency.

  In view of the above-described problems of the conventional technology, the present invention can efficiently cool the fluid machine main body, the electric motor, and the connecting portion between the fluid machine main body and the electric motor, and has a simple configuration. It is an object of the present invention to provide a scroll fluid machine capable of minimizing dimensions.

According to the present invention, the above problem is solved as follows.
(1) A rotating chamber of the orbiting scroll pivotally supported on the eccentric shaft portion of the drive shaft and a fixed lap of the fixed scroll are meshed with each other so that a sealed chamber is formed between the orbiting wrap and the fixed wrap. In a scroll fluid machine comprising a fluid machine main body and an electric motor operatively connected to the drive shaft, the fluid machine main body is connected to one side of the fluid machine main body, and the fluid machine main body and the electric motor are connected to each other. An air blower that can simultaneously blow air toward the portion and the electric motor is arranged.

(2) In the above item (1), on the air blowing side of the air blower, the air generated by the air blower is distributed between the fluid machine main body, the fluid machine main body and the electric motor with a distribution ratio corresponding to the required heat dissipation amount. The part and the drift plate which drifts to the required cooling location of the electric motor are provided.

(3) In the above item (1) or (2), the air blower is mounted on one side of the fluid machine main body, supported on the mounting plate, and on one side of the fluid machine main body. A blower fan that rotates about a rotation axis that is substantially orthogonal to the rotation axis is included.

(4) In the above (1) or (2), the air blower is fixed to one side portion of the fluid machine main body, and the fluid machine main body, a connecting portion between the fluid machine main body and the electric motor, and the electric motor A casing having opposed air outlets and a blower fan housed in the casing and rotatable about a rotation axis substantially parallel to one side of the fluid machine main body are included.

(5) In any one of the above items (2) to (4), a temperature detection sensor is disposed in the heat generating portion of the fluid machine main body and / or the electric motor, and the blower fan is set according to the detected temperature of the temperature detection sensor. Drive control of the rotating fan motor is performed.

According to the present invention, the following effects can be achieved.
According to the first aspect of the present invention, the fluid machine main body, the connecting portion between the fluid machine main body and the electric motor, and the electric motor can be efficiently and simultaneously cooled by one air blower. Also, the configuration is simple and the overall dimensions can be minimized.

  According to the second aspect of the present invention, the drift plate can send the wind with optimum efficiency to each cooling required portion with a distribution ratio corresponding to the required heat radiation amount.

According to the third aspect of the invention, the blower fan can be attached to one side portion of the fluid machine main body through the mounting plate, and the fluid machine main body, the fluid machine main body, A connection part with an electric motor and an electric motor can be cooled.

According to the fourth aspect of the present invention, the air can be uniformly sent to the fluid machine main body, the connecting portion between the fluid machine main body and the electric motor, and the electric motor, and each part can be effectively cooled.

  According to the fifth aspect of the present invention, the fan motor can be controlled to be turned on and off in accordance with the temperature detected by the temperature detection sensor, whereby it can be economically and efficiently cooled.

  1 to 5 show a first embodiment of the present invention. In the following description, the left side in FIGS. 1 and 2 is “front”, and the right side is “rear”.

In each figure, the scroll fluid machine is disposed on one side of the fluid machine main body 1, the electric motor 2 connected to the rear portion (right side in FIGS. 1 and 2) of the fluid machine main body 1, and the fluid machine main body 1. The air blower 3 is provided.

  As shown in FIG. 4, the fluid machine main body 1 includes a fixed scroll 5 in which a fixed wrap 4 is integrally formed on the rear surface, an intake port 5 a is provided in the upper front portion, and a discharge port 5 b is provided in the center of the front surface. 5, a housing 6 that covers the entire mechanism, a drive shaft 7 that is pivotally supported via a bearing 6 b in a boss 6 a provided at the rear center of the housing 6, and a drive An orbiting scroll 8 having an orbiting wrap 9 pivotally supported by an eccentric shaft portion 7a integrally formed at the front end portion of the shaft 7 and forming a sealed chamber by meshing with the fixed wrap 4 on the front surface, and a rear end portion Three sets of crankpins 10 (only one crankpin 10 is shown in FIG. 4) constituting a rotation prevention mechanism pivotally supported by the housing 6 and having a front end pivotally supported by the orbiting scroll 8. ) And To have.

  By rotating the drive shaft 7 by the electric motor 2 and turning the orbiting scroll 8, a hermetic chamber is formed between the fixed lap 4 and the orbiting lap 9, and the outside air taken in from the intake port 5a is compressed and exhausted. It discharges to the outside from the mouth 5b.

  A large number of cooling fins 11 and 12 are provided on the front surface of the fixed scroll 5 and the rear surface of the orbiting scroll 8, respectively, and these cooling fins 11 and 12 diffuse heat generated by the compression operation.

A large number of cooling fins 13 a protrude from the outer periphery of the housing 13 of the electric motor 2. The front end plate 13 b of the housing 13 is bolted to the rear portion of the housing 6 of the fluid machine main body 1.
The front end portion of the output shaft 14 for rotational drive that protrudes forward from the center of the end plate 13 b is connected to the rear end of the drive shaft 7 via a shaft coupling 15 so that the power of the electric motor 2 is transmitted to the drive shaft 7. It has become.

  As shown in FIGS. 1 to 3 and 5, the air blower 3 is fixed to one side of the housing 6 by a plurality of mounting screws (not shown), and the rear side end is connected to the fluid machine main body 1 and the electric motor 2. Are connected to the periphery of a thin box-shaped mounting plate 16 extending to the vicinity of the connecting portion (the boss portion 6a covering the shaft coupling 15) and a circular opening 17 provided in the center of the mounting plate 16, and on the outer surface. A short cylindrical hood 19 provided with a plurality of grills 18, a blower fan 20 that is housed in the hood 19 and that can rotate around a rotation axis that is orthogonal to one side of the fluid machine main body 1, and an output A flat fan electric motor 21 whose shaft is connected to the rear surface of the blower fan 20 and a plurality of support stays 22 for fixing the fan electric motor 21 to the center position in the hood 19 are provided.

  Of the support stays 22, the upper stay 22 a is a guide portion that also serves as a motor support whose cross section forms an airfoil. Depending on the shape of the blade of the guide portion 22 a, in particular, an arrow in FIGS. As shown, a part of the wind generated by the fan electric motor 20 is drifted to the electric motor 2 side so that not only the side surface of the fluid machine main body 1 but also the electric motor 2 and the fluid machine main body in which the electric motor 2 and the shaft coupling 15 are located. 1 and the motor 2 side are simultaneously blown with an optimum sharing ratio. Therefore, the fluid machine main body 1, the connecting portion between the fluid machine main body 1 and the electric motor 2, and the electric motor 2 can be efficiently cooled by the single air blower 3. In addition, since the blower 3 is arranged on one side of the fluid machine main body 1, the configuration is simple and the overall dimensions can be minimized.

  Note that the number of guide portions 22a is not limited to one, but may be increased as appropriate according to the optimal distribution ratio of the air volume to the fluid machine main body 1 and the electric motor 2, or may be omitted depending on circumstances.

FIG. 6 shows a second embodiment of the present invention. Note that in the second embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In 2nd Embodiment, the cylindrical air blower 30 which makes it adjoin to the one side part of the fluid machine main body 1, and the one side part of the electric motor 2, and makes them substantially parallel is arrange | positioned.

The blower 30 is housed in the casing 31, which includes a casing 31 having a side portion of the fluid machine main body 1, a connecting portion between the fluid machine body 1 and the electric motor 2, and an outlet 31 a facing the one side portion of the electric motor 2. And a blower fan 33 formed of a cross flow fan or a sirocco fan that can rotate around a rotation shaft 32 substantially parallel to one side of the fluid machine main body 1, and a fan electric motor 34.
Thereby, wind can be simultaneously and uniformly sent to the fluid machine main body 1, the connection part of the fluid machine main body 1 and the electric motor 2, and the electric motor 2, and each part can be cooled effectively.

  FIG. 7 shows a third embodiment of the present invention. Note that in the third embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the third embodiment, the fluid machine main body 1 and the electric motor 2 are provided with temperature sensors 23 and 24, and the outputs of the temperature sensors 23 and 24 are connected via the lead wires 23 a and 24 a and the A / D converter 25. , And is input to the control means 26.

  The control means 26 stores preset temperature data in advance. The detection data of the temperature sensors 23 and 24 are always compared with the preset temperature data. If the detection data is lower than the preset temperature, the fan motor 21 ( Alternatively, when 33) is turned off and the temperature becomes higher than the set temperature, the drive output of the fan motor 21 (or 33) is commanded. Thereby, it can cool economically and efficiently.

  In addition, in each said embodiment, although the ventilation fans 20 and 33 and the electric motors 21 and 34 for fans were arrange | positioned in the vicinity of one side part of the fluid machine main body 1, this invention is not specified to this. Instead of this, only the fluid machine main body 1, the connecting part between the fluid machine main body 1 and the electric motor 2, and the air outlet that blows out the wind generated by the rotation of the blower fans 20 and 33 toward the electric motor 2 are used as the fluid machine. You may arrange | position in the vicinity of the main body 1.

  Further, a plurality of drift plates are provided on the blower side of the blower fans 13a and 20 so that the direction of the cooling air is drifted to a place where it is particularly necessary to cool, and the drift fans generate the blower fans 13a and 20 with the drift plates. The air flow may be drifted to the fluid machine main body 1, the electric motor 2, and the connecting portion between the fluid machine main body 1 and the electric motor 2 with a distribution ratio corresponding to the required heat radiation amount. The distribution ratio according to the required heat dissipation amount is, for example, the amount of air blown to the portion where the fixed wrap 4 and the swirl wrap 9 are engaged, the periphery of the bearing of the eccentric shaft portion 7a, etc. and the amount of heat generated is large. In order to increase the amount of heat generation, the amount of air blown is distributed to be reduced. In this case, the direction of the drift plate is changed manually to a predetermined direction, or the direction of the drift plate is changed by the power of the motor or the like based on the temperature detected by the temperature sensors 23 and 24. Try to change to more parts.

It is a side view of the scroll fluid machine of a 1st embodiment in the present invention. It is also a plan view. It is also a front view. It is the IV-IV line longitudinal cross-sectional view in FIG. (a) is an exploded perspective view of the cooling fan, and (b) is a perspective view in an assembled state. It is a top view of the scroll fluid machine of a 2nd embodiment in the present invention. It is explanatory drawing which shows the scroll fluid machine of 3rd Embodiment in this invention, and its control system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluid machine body 2 Electric motor 3 Blower 4 Fixed lap 5 Fixed scroll 5a Inlet port 5b Inlet port 6 Housing 6a Boss part 6b Bearing 7 Drive shaft 7a Eccentric shaft part 8 Orbiting scroll 9 Orbiting wrap 10 Crank shaft 11, 12 Cooling fin 13 Motor housing 13a Cooling fin
13b Front end plate 14 Output shaft 15 Shaft coupling 16 Mounting plate 17 Opening 18 Grill 19 Hood 20 Blower fan 21 Fan motor 22 Support stay 22a Guide portions 23 and 24 Temperature sensors 23a and 24a Lead wire 25 A / D converter 26 Control means 30 Blower 31 Casing 31a Air outlet 32 Rotating shaft 33 Blower fan 34 Motor for fan

Claims (5)

A fluid machine that forms a sealed chamber between the orbiting wrap and the fixed wrap by meshing the orbiting wrap of the orbiting scroll pivotally supported by the eccentric shaft portion of the drive shaft and the fixed lap of the fixed scroll. In a scroll fluid machine comprising a main body and an electric motor operatively connected to the drive shaft,
A scroll fluid machine characterized in that a fluid machine body, a connecting portion between the fluid machine body and the electric motor, and a blower capable of simultaneously blowing air toward the electric motor are arranged on one side of the fluid machine main body. .   On the air blowing side of the air blowing device, the air generated by the air blowing device is distributed to the fluid machine main body, the fluid machine main body and the electric motor, and the required cooling location of the electric motor, with a distribution ratio corresponding to the required heat dissipation amount. The scroll fluid machine according to claim 1, further comprising a drift plate for drifting. The blower includes a mounting plate that is fixed to one side of the fluid machine main body, and a blower fan that is supported by the mounting plate and rotates about a rotation axis that is substantially orthogonal to the one side of the fluid machine main body. The scroll fluid machine according to claim 1, wherein the scroll fluid machine is included. The blower is fixed to one side portion of the fluid machine main body, and has a casing having the fluid machine main body, a connecting portion between the fluid machine main body and the electric motor, and a blower outlet facing the electric motor, and accommodated in the casing. 3. The scroll fluid machine according to claim 1, further comprising a blower fan that is rotatable about a rotation axis substantially parallel to one side of the fluid machine body. 5. A temperature detection sensor is disposed at a heat generation point of the fluid machine main body or the electric motor, and drive control of the fan electric motor for rotating the blower fan is performed according to the detected temperature of the temperature detection sensor. A scroll fluid machine according to any one of the above.

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