JP3312989B2 - Fluid compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid compressor having a switching valve for switching a flow path of a working fluid (refrigerant) of an air conditioner, for example.

[0002]

2. Description of the Related Art Generally, in an air conditioner performing both cooling and heating, the flow of a working fluid (refrigerant) flowing through an indoor heat exchanger and an outdoor heat exchanger is switched between during cooling and during heating. A four-way valve device is provided.

[0003] As such a four-way valve device, generally,
The one shown by 1 in FIG. 13 is widely used. The four-way valve device 1 includes a valve body 2, a high-pressure gas introduction pipe 3 and a low-pressure gas discharge pipe 4 connected to the valve body 2, and further includes a sliding valve provided in the valve body 2. 5 is provided with first and second connection pipes 6 and 7 that communicate with the low-pressure gas discharge pipe 4 or the high-pressure gas introduction pipe 3 by switching.

The sliding valve 5 has first and second spaces R 1, R 2 defined at both longitudinal ends of the valve body 2 by pistons 8, 9 connected to the sliding valve 5. And is operated by a pressure difference between the first and second spaces R1 and R2.

As a device for introducing a pressure difference into the valve body 2 to operate the sliding valve 5, an electromagnetic valve device shown in FIG. 10 is used. The solenoid valve device 10 is connected to first and second copper capillaries 11 and 12 connected to the first and second spaces R1 and R2, and is drawn out from the low-pressure gas discharge pipe 4. A third copper capillary 13 made of copper is connected between the first and second capillaries 11 and 12.

[0006] A valve element 14 provided in the electromagnetic valve device 10 is provided with an electromagnet and a spring 1 shown in FIG.
6, the four-way valve device 1 is switched.
The pressure (low pressure) in the low-pressure gas discharge pipe 4 is introduced into the first or second space R1 or R2 in the valve body 2.

[0007] The pistons 8 and 9 provided in the four-way valve device are provided with fine through holes, respectively, and the pressure in the valve body 2 is previously set in the first and second spaces R1 and R2. (High pressure), the first,
When a low pressure is introduced into one of the second spaces R1 and R2, a pressure difference occurs between the two and the sliding valve 5 is switched.

In the air conditioner, the four-way valve device 1
The high-pressure gas introduction pipe 3 is connected to a discharge pipe of a compressor shown in FIG. 18 and the low-pressure gas discharge pipe 4 is connected to a suction pipe of the compressor 18.

Further, the first connection pipe 6 is connected to an outdoor heat exchanger indicated by 19 in FIG.
20 is connected to the indoor heat exchanger. Next, the operation of the air conditioner will be described.

When the heating operation is performed, the sliding valve 5 is positioned at the position shown in FIG.
The connection pipe 7 and the high-pressure gas introduction pipe 3 are connected to each other, and the first connection pipe 6 and the low-pressure gas discharge pipe 4 are connected to each other.

As a result, the working fluid flowing through the refrigerant pipe of the air conditioner changes its state while changing the state, as shown by the arrows in the figure, the compressor 18, the indoor heat exchanger 20, and the expansion valve 2.
1. The outdoor heat exchanger 19 and the compressor 18 are circulated in this order, and this air conditioner performs a heating operation.

Further, at the time of cooling, the solenoid valve device 10 switches the sliding valve 5 of the four-way valve device 1 so that the first connection pipe 6 and the high-pressure gas introduction pipe 3 communicate with each other. 2 and the low pressure gas discharge pipe 4 are communicated with each other. In this way, the working fluid flows from the outdoor heat exchanger side 19 to the indoor heat exchanger 20 opposite to the case described above, and causes the air conditioner to perform the cooling operation.

[0013]

The air conditioner equipped with the above-described four-way valve device has the following problems to be solved. That is, the four-way valve device 1 and the solenoid valve device 10 as described above are complicated in configuration and large in size, and require a large number of parts as described above. Further, the piping is complicated, and in particular, the high-pressure gas introduction pipe 3 is connected to the discharge pipe of the compressor 18 so that vibration is easily transmitted, and therefore, it may be necessary to take an anti-vibration measure.

Conventionally, R-refrigerants for air conditioners have been
HCFC-based refrigerant represented by 22 was used,
CFC regulations have been started, and HFC-based refrigerants are being studied as alternative refrigerants.

The HFC-based refrigerant is a refrigerant having a property of transmitting sound more easily than the conventional HCFC-based refrigerant. In particular, in the four-way valve device 1 using the reciprocating sliding valve 5,
The collision sound at the time of the switching operation is generated through the refrigerant through the indoor heat exchanger 20.
To generate noise (abnormal noise).

On the other hand, the first to third capillaries 11 to 13 connecting the valve body 2 and the solenoid valve device 10 are connected to the case 2
Since it is exposed to the outside of 4, there is also a disadvantage that it is deformed by a slight impact and malfunctions.

An invention made to solve such a problem is disclosed in Japanese Patent Application Laid-Open No. Sho 60-124595. As shown in FIG. 14, the present invention is a compressor of a type in which a high-pressure discharge gas discharged from the compressor section 22 is filled in a sealed case 24 accommodating the compressor section 22 and the electric motor section 23. By incorporating the four-way valve device 1 and the solenoid valve device 10 having the above-described configuration in the case 24, the piping of the high-pressure gas introduction pipe 4 becomes unnecessary, and the capillaries 11 to 13 are damaged by external force. It is to prevent.

However, even with such a configuration, the problem that the configuration is complicated and large is not solved. Further, by incorporating such a four-way valve device 1 into the case 24, A new problem arises in that the compressor itself becomes large in size and cannot respond to the recent trend of downsizing of the compressor.

Since the four-way valve device 1 is operated by a pressure difference, the sliding valve 5 must always be kept in close contact with the valve seat. Balance).

That is, in this case, since it takes a long time to balance the pressure, it may not be possible to restart after stopping or to quickly switch the operation between cooling and heating.

In the case of such a fluid compressor, a plurality of pipes (low-pressure gas discharge pipe 4, first and second connection pipes 6) are connected from the upper end wall of case 24 as shown in FIG. , 7) and the power supply terminal are taken out.

For this reason, a large number of through holes must be provided in the upper end wall of the case 24, and there is a problem in maintaining the hermeticity (airtightness) of the case 24. Further, the above case 2
4 has a curved shape (dowel) in consideration of pressure resistance.
However, when the above-mentioned sealing and airtightness are considered, the adhesion between the case 24 and each pipe and terminal is important. That is more desirable.

However, when the upper end wall of the case is flat, there is a problem that the pressure resistance is deteriorated. On the other hand, when performing a pressure test or a gas leak test on the fluid compressor, the four-way valve device 1 is mounted on the case 24. That is, the low-pressure gas discharge pipe 4, the first and second connection pipes 6, which protrude out of the case,
7 is connected to a test gas introduction pipe (not shown), and a test gas at a predetermined temperature and pressure is injected into the switching valve device 1 and the case 24 through the gas introduction pipe.

However, the work of connecting the test gas introduction pipes to each of the pipes 4, 6, and 7 is troublesome, and the pipes 4, 6, and 7 may be deformed or damaged at the time of connection. is there. In addition, it may be difficult to keep the connection between the pipes 4, 6, 7 and the gas introduction pipe airtight.

The fluid compressor is provided with the case 24
, Two devices, the four-way valve device 1 and the electromagnetic switching valve device 10, must be provided. Further, the four-way valve device 1 is a direct acting type, and the valve main body 2 has a structure that is long in one direction.

For this reason, the degree of freedom of the installation position of the four-way valve device 1 is low, and the high-pressure gas introduction pipe 3 opening into the case 24 is separated from the center axis of the case 24 and the case
In some cases, the opening may be opened at a position close to the inner peripheral wall of the blade 24.

In the case 24, the driving motor 2 is provided.
Lubricating oil for lubricating 3 and the like is scattered in a spray state, and is particularly scattered at a position near the inner peripheral wall of the case 24.

As a result, a large amount of the lubricating oil is sucked into the high-pressure gas introducing pipe 3 and the amount of the lubricating oil in the case 24 is reduced, and the outdoor or indoor heat exchanger is reduced. Because the above lubricating oil will enter inside,
There is a problem that the heat exchange performance of this heat exchanger is reduced.

The present invention has been made in view of the circumstances described above, and can simplify the piping configuration of an air conditioner, and can easily and quickly balance the pressure at the time of stopping. It is another object of the present invention to provide a fluid compressor which is excellent in pressure resistance and confidentiality and can prevent the outflow of lubricating oil in a case.

[0030]

According to a first aspect of the present invention, there is provided a cylindrical sealing case having one end and the other end closed in the axial direction, and a case provided in the case. A compressor for compressing the low-pressure fluid sucked from the outside and discharging the compressed high-pressure fluid into the case; and a drive motor provided in the case for driving the compressor. A rotary switching valve provided in the case to switch a discharge pipe of a high-pressure fluid to the outside of the case and a suction pipe of a low-pressure fluid to the compressor section by rotating a valve body; The above case
A valve base for the rotary directional control valve, which is disposed on one end wall of the case and dispersed around the central axis of the case and fixed through the case; A fluid compressor comprising a power supply terminal and a power supply terminal for the drive motor.

[0031] A second means is the fluid compressor of the first means, wherein the rotary switching valve comprises a valve base fixed to one end wall of the case and a valve base of the valve base. A valve body rotatably provided on the inner surface of the case, and an actuator fixed to the valve base and provided in the case for driving the valve body to rotate. Wherein the actuator is provided at a position close to a power supply terminal for a switching valve or a power supply terminal for the drive motor fixed to one end wall of the case. Is what you do.

A third means is the fluid compressor of the first means, wherein the rotary switching valve is a valve base fixed to one end wall of the case, and A valve body rotatably provided on the inner surface of the case, and an actuator fixed to the valve base and provided in the case and rotatably driving the valve body. The actuator is disposed at a position close to a terminal, which is one of the smaller one of a power supply terminal for a switching valve and a power supply terminal for the drive motor, which is fixed to one end wall of the case. A fluid compressor characterized by being performed.

Fourth means is the fluid compressor of the first means, wherein the rotary switching valve is provided on a valve base attached to the case, and on the valve base; Three ports opening on the inner and outer surfaces of the case of the valve base, and a valve body rotatably provided on the inner surface of the case where the three ports of the valve base open. And the valve body is provided on a surface of the valve body facing the valve base, and by rotating the valve body by a predetermined angle, two adjacent ones of the three ports are selectively communicated with each other. A valve provided with a communication groove, a through hole provided in the valve body for communicating another port into the case, and an actuator for driving the valve body to rotate; Is
Of the three ports, two ports located at both ends in the circumferential direction are fixed to the case so that they are closer to the center axis of the case than the other port. It is characterized by having.

A fifth means is the fluid compressor of the first means, wherein a test gas introduction pipe is provided on an outer peripheral surface of the rotary switching valve which is exposed outside the case. And an engaging portion that engages with the second member is provided. A sixth means is the fluid compressor of the first means, wherein the fluid filled in the case is an HFC-based refrigerant.

[0035]

According to the first means, the flow path of the fluid introduced into the compressor can be changed by rotating the valve body. Thus, in the air conditioner having the indoor heat exchanger and the outdoor heat exchanger, switching between the cooling operation and the heating operation can be performed. Further, since the valve base and the two power supply terminals are provided around the central axis of the case, the strength of one end wall of the case can be made substantially uniform.

According to the second and third means, since the actuator is arranged close to one of the two terminals, the degree of freedom in the position where the valve base is provided is increased. ,
The strength of the one end wall can be made more uniform.

Further, according to the fourth means, the two ports which are opened in the case during cooling or heating and are on the suction side can be arranged at positions close to the center axis of the case. Therefore, the suction of the lubricating oil scattered in the case can be reduced.

Further, according to the fifth means, at the time of a pressure resistance test, a gas leak test or the like, the test gas introduction pipe is connected to the valve base.
The gas introduction pipe and each pipe of the valve base can be connected by engaging and connecting with the gas base.

Further, according to the sixth means, the fluid compressor can be operated with an HFC-based refrigerant which is a substitute for Freon. In this case also, the switching valve in the case is operated. Thus, switching between heating and cooling can be performed. Further, the strength of one end wall of the case can be made uniform.

[0040]

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 25 in FIG. 1 denotes a closed case. This sealing case 25 is a cylindrical one having a closed lower end.
A lid 25a is attached to the upper end opening.

The lower end wall of the sealing case 25 is formed in a curved shape (dome shape) in order to increase the pressure resistance, but the upper wall of the lid 25a is formed in a substantially flat shape. I have. Since many parts (switching valve parts, first and second sealed terminals) are attached to the upper wall of the lid part 25a as described later, it is necessary to ensure the close contact with these parts. The upper wall of the portion 25a is formed substantially flat.

On the other hand, in the sealed case 25, the compressor unit 2 is provided at the lower end, the middle and the upper end in the height direction.
6, a motor section 27 for driving the compressor section 26 to perform a compression operation, and a switching valve section 28 which is a main part of the present invention.
(Rotary switching valve).

Hereinafter, the configuration of each part will be described. The motor unit 27 is a DC brushless motor composed of a stator 30 fixed to the inner surface of the sealed case 25 and a rotor 31 disposed inside the stator 30. is there. The rotor 31 is shrink-fitted on the upper portion of the drive shaft indicated by reference numeral 32 in FIG.

The drive shaft 32 is provided with its rotation axis aligned with the center axis of the closed case 25. The lower end of the drive shaft 32 extends into the compressor section 26.

The lower end of the drive shaft 32 is provided at a predetermined distance in the vertical direction and
Two crank portions 32 provided with a phase shift of 80 °
a is formed.

The compressor section 26 is held by a partition member 33 fixed to the case 25, and is connected in the vertical direction via an intermediate plate 34 shown in FIG. 35, 35 are provided. The drive shaft 3 is provided in the two cylinders 35.
2, two crank portions 32a, 32a are respectively located.

The shaft 32 is connected to a first bearing member 37 (main bearing) fixed to the partition member 33.
The first bearing member 37 and the second bearing member 38 (sub bearing) for closing the upper and lower ends of the two cylinders 35, 35 are rotatably supported around a vertical axis.

The two crank portions 32a of the shaft 32 have cylindrical rollers 40, 4 respectively.
0 is fitted. The roller 40 is mounted on the cylinder 3
The cylinder 35 is held eccentrically with a part of the outer peripheral surface in contact with the inner peripheral surface of the cylinder 35.

Accordingly, a compression space 41 having a crescent cross section is defined between the inner peripheral surface of the cylinder 35 and the outer peripheral surface of the eccentric roller 40. A blade 42 for dividing the compression space 41 into a high pressure side and a low pressure side is provided in the cylinder 35 (the upper cylinder 35 is not shown). This blade 4
Reference numeral 2 denotes the roller 4 by a spring indicated by reference numeral 43 in FIG.
It is urged toward the zero side (toward the center of the cylinder 35) so that it enters and exits a blade groove (not shown) provided in the cylinder 35 so that its tip always contacts the outer peripheral surface of the roller 40. Has become.

On both sides of the cylinder 35 with the blade 42 interposed therebetween, a suction passage 44 for sucking the refrigerant gas into the compression space 41 and a discharge for discharging the compressed refrigerant gas (discharge gas). A passage is formed. The suction passage 44 is shown only in the upper cylinder 35.

Each of the suction passages 44 is provided with 45
The suction pipe 45 is connected to a gas-liquid separator 46 as shown in FIG.

On the other hand, the discharge passage includes a first passage that opens from the first discharge valve 47 provided on the flange portion of the first bearing member to the upper part of the case 25 through the muffler 48. A second discharge valve 49 provided on a flange portion of the second bearing member 38 communicates with a muffler 50, and the muffler 50 allows the cylinder 35, the intermediate plate 34, the first
And a second passage which penetrates through the bearing member 37 and is also opened to the upper part of the case 25.

Therefore, the working fluid in the refrigerant pipe is sucked into the cylinder 35 by the suction pipe 45,
After being compressed by the rotation of the roller 40, it passes through the discharge passage including the first and second passages, and
The ink is discharged into the upper part of the nozzle 25. That is, the inside of the case 25 is maintained at a high pressure by the high-pressure discharge gas.

On the other hand, a lubricating oil is stored in a space 25b at the lower end of the closed case 25. A fine hole (not shown) is formed in the drive shaft 32 in the vertical direction, and a pump mechanism (not shown) for sucking the lubricating oil into the fine hole is provided at a lower end of the shaft 32.

The lubricating oil sucked into the shaft 32 is discharged from the pores into the compressor section 26,
Lubrication of each sliding portion of the compressor section 26 is performed. The high-pressure fluid mixed with the lubricating oil discharged into the case 25 passes through a gap between the rotor 31 and the stator 30 and a refrigerant flow passage 31a provided through the rotor 31 in the axial direction. And collide with the lower surface of the disk-shaped oil separation plate 51 fixed to the upper end surface of the shaft 32.

The high-pressure fluid in the case 25 and the lubricating oil are separated by the centrifugal force generated by the rotation of the oil separating plate 51, and the separated lubricating oil is separated from the inner peripheral wall of the case 25. The lubrication of each sliding portion of the electric motor unit 27 is performed.

Then, the lubricating oil which has finished lubricating the respective sliding parts is collected at the lower end of the case 25, and the lubricating oil of the respective sliding parts of the electric motor unit 27 and the compressor unit 26 is again provided. It has become.

The high-pressure fluid separated from the lubricating oil is led out of the case 25 through the switching valve portion 28. Next, the switching valve section 28 will be described with reference to FIGS.

The switching valve section 28 is a four-way switching valve.
As shown in FIG. 1, a valve base 52 penetrated and fixed to the upper wall of the lid 25a of the sealing case 25, and the valve base 5
A valve member 53 rotatably provided on the inner surface of the case 2 for switching the flow path of the working fluid, a magnet member 54 fixed to a radially outer edge of the valve member 53, and a magnet member 54. A magnetic force switching section 55 (actuator) for driving the valve body 53 by applying a magnetic force to switch the flow path, and a holder 56 for covering the switching valve section 28 are provided.

As shown in FIG. 3, the valve base 52 has a circular shape in a plan view, and has a flange portion 52a formed at a lower end portion with a diameter larger than that at an upper end portion. As shown in FIG. 1, the valve base 52 penetrates the upper wall of the lid 25a for closing the upper end of the sealing case 25.

That is, a first mounting hole 57 shown in FIG. 1 is formed in the upper wall of the lid 25a so as to penetrate the sealing case 25. And this valve base 52
Is attached to the lid portion 25a by inserting the upper end side into the first mounting hole 57 so that the first mounting hole 57 is airtightly closed, for example, by welding. Has become.

Further, as shown in FIG.
2 is provided on the center axis L of the valve base 52,
A center shaft 58 having a lower end protruding into the case 25 is fixed. The valve base 52 is provided on the valve base 52 at intervals of 90 ° in the circumferential direction around the central axis 58.
3, three ports 59 to 61 are provided to penetrate the shaft 2 in the axial direction.

A port 60 located at the center of the three ports 59 to 61 is connected to a suction pipe 45 extending from the compressor section 26 as shown in FIG. It is a gas discharge port (corresponding to 4 in the conventional example (FIGS. 13 and 14)), and the other two ports 59 and 61 sandwiching the low-pressure gas discharge port 60 are shown in FIG. 62, 6
The first and second connection ports (6, 7 in the conventional example) connected to the indoor heat exchanger and the outdoor heat exchanger indicated by 3
).

As shown in FIG. 3, this valve base 5
2, 180 degrees from the low pressure gas discharge port 60 in the circumferential direction.
At a position spaced apart, a stopper 64 whose lower end is slightly protruded from the lower surface of the valve base 52 (shown by a mesh in the figure).
Is buried.

This stopper 64 is provided in FIGS.
As shown in (b), the upper end is screwed to the valve base 52 to be attached. Also, this stopper 6
The portion projecting from the lower surface of the valve base 52 has an outer diameter slightly smaller than the width of each of the three ports 59-61.

On the other hand, on the outer peripheral surface of the upper end of the valve base 52, a concave groove 52b as an engaging portion for engaging with a test gas introducing pipe described later is formed on the entire periphery of the valve base 52. It is formed over.

The valve body 53 is attached to the lower surface of the valve base 52 formed as described above, as shown in FIG. This valve body is formed of a heat-resistant non-magnetic metal such as aluminum, brass, and zinc.

The upper surface of the valve body 53 is formed by inserting the center shaft 58 projecting from the valve base 52 into a center hole 53a provided in the center of the valve body 53. And is rotatably attached to the valve base 52.

As shown in FIG. 5, on the upper surface of the valve body 53, two ports (59, 60 or 60, 6) adjacent to each other at 90 ° intervals among the three ports 59-61.
A concave groove 66 for communicating 1) is provided.

As shown in the figure, the recessed groove 66 is a passage having an inner surface formed in a semicircular vertical cross section. ~
As shown in (d), adjacent ports, that is, the low-pressure gas discharge port 60 and the first connection port 59, or the low-pressure gas discharge port 60 and the second connection port.
The switches 61 are switched so as to communicate with each other.

As shown in FIG. 5, the upper surface of the valve body 53 is hermetically sealed between the valve body 53 and the valve base 52 around the concave groove 66. Seal member 6
6a is formed integrally with the valve base 52.

A through hole 67 penetrating from the upper surface to the lower surface of the valve body 53 is provided at a position of the valve body 53 which is point-symmetric with respect to the concave groove 66 and the center hole 53a. The through hole 67 is provided in a shape similar to the concave groove 66 in a plan view.

As shown in FIG. 2 (b), the lower end protruding portion of the stopper 64 provided on the valve base 52 is provided with the valve body 53 attached to the valve base 52. It is located in this through hole 67.

Then, the stopper 64 is provided as shown in FIG.
As shown in FIG. 5, the valve body 53 contacts the one end or the other end in the circumferential direction of the through hole 67 to move the valve body 53 in the rotation direction 90 °
The range is regulated. Also, this valve element 5
By rotating the 3 through this 90 ° range, the through hole 67 can be switched so as to communicate with the first or second connection port 59, 61.

From the positional relationship between the concave groove 66 and the through hole 67, as shown in FIGS. 8A and 8B, the first connection port 59 communicates with the through hole 67. In such a case, the second connection port 61 and the low-pressure gas discharge port 60 communicate with each other through the concave groove 66.

As shown in FIGS. 8C and 8D,
When the second connection port 61 communicates with the through hole 67, the first connection port 59 and the low-pressure gas discharge port 60 are connected to each other by the concave groove 66. It has become.

The through hole 67 is provided in the case 25.
Since it is open to the inside, the same operation as the conventional high-pressure gas introduction pipe 3 (shown in FIGS. 13 and 14) is achieved.

As shown in FIG. 5, the upper end of the valve body 53 is formed as a flange 53b in the form of a flange projecting slightly outward in the radial direction of the valve body 53. At a predetermined position along the circumferential direction of the lower surface of the flange portion 53b, a positioning projection 68 that engages with the magnet member 54 is formed.

As shown in FIG. 2 (b), the magnet member 54 has a thin cylindrical collar 69 externally inserted at the lower end of the valve body 53 and a permanent member fixed to the outer surface of the collar 69. And a magnet 70.

FIG. 6 shows a part of the collar 69 in the circumferential direction.
Is provided with a slit 69a.
By aligning a with the projection 68 provided on the valve body 53 and engaging the same, the valve body 53 and the valve body 53 are non-rotatably combined.

Further, as shown in FIG.
0 is divided into two at 180 ° intervals,
a and an S pole portion 70b.
(Actuator according to the present invention).

As shown in FIGS. 2D and 4, the magnetic force switching portion 55 includes a pair of strip-shaped iron stays 72 provided in parallel and separated from each other, and a base of the stays 72. An iron core 73 is provided between the ends, and an electromagnet 74 is formed by applying a coil winding to the iron core 73.

The tip of the stay 72 is bent along the outer peripheral surface of the permanent magnet 70 fixed to the valve body.
The bending radius is set slightly larger than the outer diameter of the permanent magnet 70 such that the inner surface has a predetermined minute gap with the outer peripheral surface of the permanent magnet 70.

The ends of the two stays 72 are about 90 ° from each other along the bending direction of the stays 72.
It is set to be separated at an angle of. The magnetic force switching unit 55 can magnetize the tip of the stay 72 to a predetermined polarity by applying a direct current to the electromagnet 74, and switch the magnetism to attract the permanent magnet 70. -The valve body 53 is rotationally driven by the repulsive action.

Outside the tip of the stay 72, a holder indicated by 56 in FIGS. 2B to 2E is provided. The holder 56 is a thin cylindrical member,
The upper end is fixed to the lower surface of the outer edge of the flange 52a of the valve base 52.

The holder 56 is provided with (c) and (d) in FIG.
As shown in FIG.
Cutout 5 for taking out the side) out of the holder 56.
6a is provided. The holder 56 is configured to position and prevent the rotation of the magnetic force generating portion 55 by the cutout portion 56a.

On the other hand, the lower end of the holder 56 and the lower end of the central shaft 58 extending downward from the valve base 52 through the valve body 53 are provided at the lower end of FIG. In e), a pressing member indicated by 77 is fixed.

The holding member 77 is formed in a strip shape, and both ends in the longitudinal direction are fixed to the lower end of the holder 56 by welding, and the center is fixed to the lower end of the center shaft 58.

A spring shown in FIG. 78 is inserted between the central portion of the pressing member 77 and the lower surface of the valve body 53 while being compressed in the axial direction. 54) is pressed against the lower surface of the valve base 52.

The urging force of the spring 78 is applied when the compressor is not operating, that is, when the switching valve 28 is turned on.
When no pressure acts on the valve body 53, the valve body 53 has a strength sufficient to allow a minute gap between the upper surface of the valve body 53 and the lower surface of the valve base 52 due to its own weight. Has been adjusted.

When assembling the switching valve section 28 described above, first, the holder 5 is attached to the valve base 52.
6 is fixed. On the other hand, the magnet member 54 is bonded to the outer peripheral surface of the valve body 53.

Then, the upper end of the valve base 52 is inserted into the first mounting hole 57 provided in the lid 25a of the sealing case 25 and welded and fixed. Thereafter, the valve body 53 to which the magnet member 54 is adhered is attached to the center shaft 58 of the valve base 52, and the magnetic force switching unit 55 is attached. Finally, the pressing member 77 is compressed by the spring 78 while the center shaft 58 and the holder 56 are compressed.
To the bottom of

On the other hand, as shown in FIG. 1 and FIG. 7, the lid 25a is provided on the side of the first mounting hole 57, in which the valve base of the switching valve portion 28 is mounted, with the second and second holes. Three mounting holes 90a and 90b are provided. In these second and third mounting holes 90a and 90b, first and second sealed terminals (a power supply terminal for a driving motor and a power supply terminal for a switching valve) shown by 91a and 91b in the figure are provided. Second and third mounting holes 9
0a and 90b are attached in a manner to hermetically close them.

Here, the first to third mounting holes 57, 9
0a, 90b, that is, the positional relationship between the valve base 52 of the switching valve section 28 and the first and second sealed terminals 91a, 91b will be described.

As shown in FIG. 7, a line (a) connecting the centers of the first and second sealed terminals 91a and 91b and a center line (b) along the longitudinal direction of the switching valve portion 28 are parallel to each other. It is set to be.

The first mounting hole 57 (valve base 5)
2) is a line (c) passing through the center axis (shown by A in the drawing) of the case 25 and parallel to the center lines (a) and (b).
It is provided at a position shifted by a distance t (t> 0).

Therefore, the first to third mounting holes 5
7, 90a, 90b are dispersedly provided so as to form a triangle surrounding the central axis A of the case 25. Next, the positional relationship between the first and second connection ports 59 and 61 provided on the valve base 52 will be described with reference to FIG.

The first and second connection ports 59, 61
Are provided so as to be located on concentric circles about the center axis A of the case 25. That is, the first,
The second connection ports 59 and 61 are located closer to the central axis A than the other ports 60 (low-pressure gas introduction ports) provided on the valve base 52. I have.

Next, the first and second sealed terminals 91a, 91a,
91b will be described. The first and second sealed terminals 9
Reference numerals 1a and 91b denote wirings for supplying power to the electric motor unit 27 and the magnetic force switching unit 55 of the switching valve unit 28 by the case.
To take it out of the space 25.

As shown in FIG. 1, the first sealed terminal 91a is connected to three first to third inner terminals 92 to 94 projecting into the case 25, and to the respective terminals. Three first to third outer terminals 9 protruding out of the case 25
6 to 98.

The second sealed terminal 91b is formed of a pair of inner terminals 95, 95 similarly protruding into the case 25.
And a pair of outer terminals 99, 99 connected to the respective terminals and protruding out of the case 25.

The first to third inner terminals 92 to 94 of the first sealed terminal 91 a are connected to the electric motor 27.
Are connected via a pair of first connectors 100 to the three lead wires extracted from the three-phase winding of the second embodiment.
The pair of inside terminals 95, 95 of the sealed terminal 91b are connected to two lead wires taken out from the switching valve section 28 via a pair of second connectors 101, respectively.

That is, when assembling the compressor, the switching valve portion 28 and the first and second sealed terminals 91a and 91b are assembled to the lid portion 25a. The second connector 101 extending from the pair of inner terminals 95, 95 is connected to the same second connector 101 extending from the switching valve portion.

Next, the lid 25a is attached to the case 25.
When attaching the first sealed terminal 91a to the first
The first connector 100 derived from the third inner terminals 92 to 94 and the first connector 100 derived from the electric motor 27
To the connector 100.

On the other hand, the first and second sealed terminals 91a,
Each of the external terminals 96 to 99 of the terminal 91b is connected to a control unit indicated by reference numeral 103 in FIG. The control section 103 comprises an inverter circuit 105 for driving the motor section 27 of the compressor and a control circuit 108 for driving the switching valve section 28.

Therefore, each wiring derived from the first to third outer terminals 96 to 98 of the first sealing terminal 91a is connected to the inverter circuit 105. Further, an outer terminal 99 of the second sealed terminal 91b is connected to the control circuit 108. The control circuit 108 is configured as shown in FIG. 8, for example.

That is, the power supply from the AC power supply 107 to the electromagnet 74 of the magnetic force switching unit 55 is performed via the phototriac 110 which performs half-wave control. At this time, the microcomputer 111 and the phototransistor 112 for detecting the AC 0V (zero cross) timing determine whether or not the phototriac 110 is energized and output the zero cross point.

As a result, the magnetic force switching section 28 can switch the magnetism of the pair of stays 72 between the north pole and the south pole (FIGS. 8A and 8C) and reduce the generation of the magnetic force. It can be stopped (FIGS. 8B and 8D).

The control section 103 is provided with a case temperature detecting section 113 for detecting the temperature inside the case 25. The temperature detection unit 113 is connected to, for example, the third and fourth external terminals 99, 99 of the closed terminal, and detects the resistance value of the coil winding of the electromagnet 74 of the magnetic force switching unit 55, thereby detecting the temperature. Case 2 based on the value
5 is detected.

Next, control (operation) of the air conditioner having the above-described compressor will be described. First, control during the cooling operation will be described.

During the cooling operation, the voltage applied to the electromagnet 74 of the switching valve section 28 is controlled as shown in the waveform diagram of FIG. As a result, the upper stage
72 is magnetized to the N pole, and the lower stay 72 is S
Magnetized to poles.

Therefore, the S pole portion 70b of the magnet member 54 fixed to the valve body 53 is positioned at the upper position in the drawing.
72, and the N pole portion 70a is positioned on the lower side.
The valve body 53 is rotated counterclockwise.

After the rotation by a predetermined angle, as shown in FIG. 8A, a stopper 64 projecting from the lower surface of the valve base 52 comes into contact with one circumferential end of the through hole 67 of the valve body 52, The valve element 53 stops. As a result, the second connection port 61 and the low-pressure gas discharge port 60 communicate with each other through the concave groove 66, and the first connection port 59 is formed.
Is released into the closed case 25 through the through hole 67.

In this state, the motor unit 27 shown in FIG.
Activate When the electric motor unit 27 operates, the compressor unit 26 operates to compress the working fluid. The compressed high-pressure fluid is discharged into the closed case 25. The high-pressure fluid filled in the sealed case 25 is
The gas flows through the through hole 67 provided in the valve body 53 and flows into the first connection port 59.

At this time, the compressor section 26 and the electric motor section 27 are placed in the case 25 together with the high-pressure fluid.
The lubricating oil supplied to the air is sprayed. However, the lubricating oil is supplied to the oil separation plate 5 by the oil separation plate 51.
1, and is separated from the high-pressure fluid by centrifugal force generated by the rotation of the oil separation plate 51.

Therefore, the high-pressure fluid flowing through the upper center of the case 25 contains almost no lubricating oil. Since the through hole 67 and the first connection port 59 are opened close to the center axis A of the case 25, the switching valve portion 28 contains almost all of the lubricating oil. High pressure fluid can be sucked in without.

The high-temperature and high-pressure fluid flowing into the first connection port 59 passes through the outdoor heat exchanger 62, the expansion valve, and the indoor heat exchanger 63 while sequentially changing the state, and cools the room. I do.

The fluid that has passed through the indoor heat exchanger 63 flows into the first connection port 61, passes through the concave groove 66 provided in the valve body 53, and passes through the low-pressure gas discharge port 6.
The gas flows into the compressor section 26 in the case 25 from the low-pressure gas discharge port 60 through the suction pipe 45 of the compressor.

The fluid introduced into the compressor section 26 is compressed again by the compressor section 26 and discharged into the case 25. Next, the air is again introduced from the first connection port 59 to the outdoor heat exchanger 62 through the through hole 67 of the switching valve section 28, and circulates in the pipe of the air conditioner.

After the switching of the valve body 53 to the cooling side by the control shown in FIG. 8A is completed, during the above-described cooling operation, the control circuit 108 operates as shown in FIG.
The control is performed as shown in the waveform diagram of FIG. That is, the applied voltage is controlled to 0, and the pair of stays 72 are not magnetized.

Even in such a state, the above-described step 7
Since 2 is made of iron (magnetic material), the state of FIG. 8A can be maintained by the attractive force with the magnet member 54. At this time, the concave groove 66 is formed.
Since the inside is at a lower pressure than the inside of case 25,
The pressure in the base 25 causes the valve body 53 and the valve base 52 to move.
Are tightly closed and cannot be easily displaced.

On the other hand, when stopping the cooling operation, the motor unit 27 is stopped. As a result, the pressure in the case 25 decreases, and the close contact between the valve body 53 and the valve base 52 is eliminated. Also, the spring 78 is slightly compressed by the weight of the valve body 53, and a minute gap is formed between the valve body 53 and the valve base 52, so that the first and second connection ports 59 are formed. , 61 and the low pressure gas discharge port 60 are balanced.

Thus, the driving of the valve body 52 at the time of switching to the heating operation described below can be easily performed with low torque. Next, control and operation during the heating operation will be described.

During the heating operation, the voltage applied to the electromagnet 74 of the switching valve section 28 is controlled as shown in the waveform diagram of FIG. Thus, contrary to the case shown in FIG. 8A, the stay 72 located on the upper side in the figure is magnetized to the S pole, and the stay 72 located on the lower side is magnetized to the N pole.

As a result, the N pole portion 70a of the magnet member 54 fixed to the valve body 53 is positioned at the upper position in the drawing.
72, and the S pole portion 70b is positioned on the lower side.
The valve body 53 is rotated by the clockwise rotation.

At the predetermined angle, the stopper 64 projecting from the lower surface of the valve base 53 comes into contact with the other circumferential end of the through hole 67 of the valve body 52 as shown in FIG. The valve body 53 stops.

Thus, contrary to the cooling operation, the first connection port 59 and the low-pressure gas discharge port 60 communicate with each other through the concave groove 66, and the second connection port 61 is formed. Is
It is released into the closed case 25 through the through hole 67.

When the operation of the electric motor section 27 is started in this state, the compressor section 26 is operated to fill the case 25 with the high-pressure fluid, and the pressure causes the valve body 53 to move the valve base 53. The lower surface 52 is brought into close contact with the lower surface.

The high-pressure fluid in the case 25 is
The air flows from the second connection port 61 to the indoor heat exchanger 63, the expansion valve (decompression device), and the outdoor heat exchanger 62 while sequentially changing the state to heat the room.

The fluid that has passed through the outdoor heat exchanger 62 flows into the first connection port 59, passes through the concave groove 66, and from the low-pressure gas discharge port 60 to the compressor. Through the suction pipe 45 to the compressor section 27 in the case 25.

During the heating operation, the voltage applied to the electromagnet 74 is controlled to 0 as in the cooling operation (FIG. 8D). However, even in such a state, since the stay 72 is made of iron (magnetic material), the state of FIG. 8C can be maintained by the attractive force with the magnet member 54. Has become.

At this time, the inside of the recessed groove 66 is a case.
Since the pressure is lower than that of the inside of the case 25, the pressure in the case 25 causes the valve body 53 and the valve base 52 to be in tight contact with each other and cannot be easily moved.

The sprayed lubricating oil scattered in the case 25 is supplied to the oil separating plate 51 similarly to the cooling operation.
And is separated from the high-pressure fluid and rarely flows into the second connection port 60.

Next, a description will be given of a case where a test of the fluid compressor, for example, a pressure test or a gas leak test is performed.
In the configuration of the conventional example (FIG. 14), when performing a similar test,
Since there were a plurality of pipes of the switching valve device protruding out of the case 25, it was necessary to connect a test gas introduction pipe to each of the pipes. Gas discharge port 60, first and second connection ports 5
9 and 60) are provided on a valve base 52 having a circular outer shape. By connecting a holder for a test gas introduction pipe shown by 115 in FIG. Each test gas introduction pipe 116 connected to 115
And connection with each of the ports 59 to 61 of the valve base 52 can be performed with one touch.

In this case, the claw 115a provided on the holder 115 is engaged with the concave groove 52b formed on the outer peripheral surface of the upper end of the valve base 52. Thus, the gas introduction pipe 115 and the valve base 52 are firmly connected.

Then, from each of the gas introduction pipes 116,
By introducing a test gas into the switching valve portion 28 (in the case 25), tests such as a pressure resistance test and a gas leak test can be performed.

According to the configuration described above, the following effects can be obtained. First, there is an effect that the piping of the air conditioner can be simplified. That is, since the through hole 67 provided in the valve body 53 is open in the case 25, a high-pressure gas pipe is not required. This also eliminates the need for anti-vibration measures conventionally required for high pressure gas piping.

Further, since the switching valve portion 55 does not use an electromagnetic valve device for actuation unlike the conventional pilot type valve, the capillary tube (FIGS. 13 and 14) required for the conventional switching valve is used. 11 to 12) shown in FIG.

Therefore, there is an effect that the compressor having the switching valve built therein can be easily assembled, and an air conditioner having a simple configuration and less vibration can be obtained. Second, there is an effect that the compressor can be downsized.

That is, the switching valve portion 28 built in the case 25 of this compressor is of a rotary type unlike the conventional example, and has no electromagnetic valve device for operation. Can be reduced.

When the compressor is stopped, the valve 5
Since the valve 3 is slightly lowered by its own weight, the close contact with the valve base 52 is eliminated, and the valve 53 can be rotated with a low torque.

In this respect, in the conventional example, the sliding valve is always kept in close contact with the valve seat, and requires a large driving torque. Therefore, in the present invention,
The magnetic force switching unit 55 can be reduced in size.

As a result, the switching valve portion 28 can be incorporated in the case 25 of the compressor without increasing the size of the case 25. There is an effect that can sufficiently cope with the tendency.

Third, the size of the welding portion for attaching the switching valve portion 28 to the case 25 can be reduced, and the reliability with respect to gas leakage and the workability of the welding operation are improved. That is, in the configuration of the conventional example, the pipes (4, 6, 7) connected to the suction pipe, the indoor heat exchanger, and the outdoor heat exchanger are separately taken out of the case 24. . Further, since the four-way valve device 1 is a direct-acting type, the respective pipes are arranged in series. Therefore, the length of welding to the case 24 is long, and there is a problem with airtightness.

However, in the present invention, each of the above-mentioned pipes is a circular valve base 5 having an upper part protruding outside the case 25.
2 are attached circumferentially. Therefore, in order to attach the switching valve portion 28 to the case 25, the valve base is required.
It is only necessary to weld the case 52 to the case 25, and the welding length is shortened, and there is an effect that the reliability against gas leakage and the welding workability are improved.

Fourth, there is an effect that the strength of the case 25 can be ensured and a highly reliable operation can be performed. That is,
In a fluid compressor with a built-in four-way valve, it is necessary to attach a plurality of parts to the upper end wall of the case, and it is necessary to ensure airtightness between the case and the case. If the upper end wall of this case has a curved shape (dome shape), it is difficult to perform welding or the like, and it is difficult to ensure airtightness.

However, such a shape may be inferior in pressure resistance. Further, depending on the position where the plurality of components are mounted, there may be a portion where the pressure resistance is extremely low locally.

In this respect, in the present invention, unlike the conventional example, three circular mounting holes 57,
It is sufficient to provide only 90a, 90b, and these three mounting holes 57, 90a, 90b are provided not dispersed over the central axis A of the case 25 but dispersed around the central axis A. .

As a result, the balance in strength can be achieved, and there is no locally weak portion. Therefore, it is possible to prevent the case 25 from being damaged and to obtain a fluid compressor having high reliability with respect to the pressure in the case.

Fifth, there is an effect that the gas balance at the time of stoppage can be easily and quickly performed. That is, in the case of a conventional reciprocating sliding valve, the sliding valve must always be kept in close contact with the valve seat in order to prevent the compressed gas leakage. In some cases, the balance could not be achieved, and it was necessary to wait a long time until the gas was balanced from within the compressor or from the expansion mechanism.

However, in the case of the present invention, when stopped, the valve body 53 is slightly lowered by its own weight, and the valve base 53 is lowered.
The gap with the switch 52 is enlarged. Therefore, all the ports 59 to 61 provided on the valve base 52 are connected to the valve body 5.
Since it communicates with the upper surface of the third through the gap generated, the gas balance can be quickly performed.

Also, during operation, the pressure in the case 25 causes the valve body 53 to be pressed against and tightly contact the valve base 52, so that no compressed gas leakage occurs. It is held so as not to move easily in the rotation direction.

Therefore, the gas balance after the stop can be easily and quickly performed, the restart after the stop and the switching between the cooling and the heating can be performed quickly, and the injection of the refrigerant or the like is also long for the gas balance. There is an effect that can be performed quickly without waiting for time.

Sixth, there is an effect that the electric power for controlling the switching valve section 28 can be reduced. That is, the above-mentioned step-7
Since the valve 2 is made of iron, the switching position can be maintained by the attractive force between the stay 72 and the magnet member 54 without magnetizing the stay 72 except when the valve body 52 is driven. .

Therefore, unlike the conventional example in which the position of the sliding valve is maintained by the spring and the electromagnet, it is not necessary to apply a voltage to the magnetic force switching unit 55 during operation, so that power consumption can be reduced. .

Seventh, there is an effect that tests such as a pressure resistance test and a gas leak test can be easily and safely performed. That is, each of the ports 59 to 6 connected to the heat exchanger or the like.
1 is an opening in the circular valve base 52, so that a holder 115 for holding a plurality of gas introduction pipes 116 is attached to the upper end of the valve base 52, whereby the plurality of gas introduction pipes are opened. 116 can be collectively connected to the ports 59 to 61.

Therefore, unlike the conventional example, it is not necessary to connect a test gas introduction pipe to each pipe led out of the case, so that the gas leak test can be easily performed.

In this case, the valve base 5
Since the connection groove 52b is provided on the outer peripheral surface of the upper end of the valve 2, the connection of the gas introduction tube holder 115 can be performed with one touch, and the gas introduction tube 115 is connected to the valve base 52 by the gas pressure during the test. Can be effectively prevented.

Further, since the gas introduction pipe is not attached to each pipe as described above, it is possible to effectively prevent each pipe from being damaged or deformed at the time of connection. As a result, there is an effect that tests such as a pressure test and a gas leak test can be easily and safely performed.

Eighth, it is possible to effectively prevent the spray-like lubricating oil scattered in the case 25 from being discharged out of the case 25 through the switching valve portion 28. That is, in the configuration of the conventional example (FIG. 14), since the switching valve device 1 is large, the degree of freedom in installation is small, the opening position of the high-pressure gas introduction pipe 3 is lowered, or the inner wall surface of the case 24 is close. May be a position.

Therefore, the lubricating oil filled in the case 24 is easily sucked into the switching valve device 1, and the lubricating oil is discharged out of the case 1 through the switching valve device 1. Sometimes.

However, the switching valve portion 28 (four-way valve) of the present invention is small as described above, and the connection ports 59 to 61 are compactly arranged on the circumference. The degree of freedom of the installation positions of the ports 59 to 61 is high.

Therefore, in the present invention, the first and second connection ports 59, 61 on the high-pressure gas suction side are connected to the other port, the low-pressure gas discharge port 60, more than the other port. −
The center 25 is disposed at a position close to the center axis A of the wire 25.

Thus, as described above, this first,
The amount of lubricating oil discharged to the outside of the case through the second ports 59 and 61 can be reduced. Therefore, the amount of lubricating oil in the fluid compressor can be kept constant, and a decrease in the heat exchange capacity of the heat exchanger can be prevented.

Ninth, there is an effect that noise generated when an HFC-based refrigerant which is a substitute for chlorofluorocarbon is used as the refrigerant can be reduced. That is, although the HFC-based refrigerant has a property that sound is easily transmitted, in the present invention, by making the switching valve portion 28 a rotary type, it is possible to reduce the generation of the switching collision noise generated in the case of the reciprocating type. be able to.

Further, since the switching valve portion 28 is built in the case 25, even if noise is generated,
The muffler effect of the case 25 (which has a large capacity and is shielded from the outside) can effectively prevent the sound from leaking to the outside. Therefore, the conventional CFC
Particularly remarkable effects are obtained when an HFC-based refrigerant which is a refrigerant or an alternative refrigerant to the HCFC refrigerant is used.

Further, in the case of the HFC-based refrigerant containing R32, in addition to the increase in noise, the pressure in the case is 1.5 to 1.7 times higher than when a refrigerant such as R12 or R22 is used. In some cases, the pressure resistance of the case becomes a problem.
In particular, in the case where a plurality of terminals are provided on the lid of the case, when the distance between the terminals is reduced, the pressure may be concentrated on that portion and gas leakage may occur.

However, in the present invention, the switching valve section 28
Valve base 52, first and second sealed terminals 91a, 91b
Are distributed around the central axis A of the lid 25a, so that even when a high-pressure HFC refrigerant is used, there is sufficient reliability.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the first embodiment, the line (a) connecting the centers of the two sealed terminals 91a and 91b and the center line (b) of the switching valve portion 28 are parallel. In the example, the switching valve portion 28 is rotated by a predetermined angle around the central axis A, so that the central axis (b) of the switching valve portion 28 is inclined with respect to the line (a).

As a result, the magnetic force switching section 55 (actuator) can be brought close to the second hermetic terminal 91b, and the whole apparatus can be made compact. Further, since the overall size can be reduced, the degree of freedom of the installation position of the switching valve portion 28 is improved, and the valve base 52 (the first mounting hole) is compared with the first embodiment (FIG. 7). 5
7) is provided at the first and second closed terminals 91a,
As compared with 91b, it can be shifted downward in the drawing.

As a result, the valve base 52, the first and second sealed terminals 91a and 91b (the first to third mounting holes 5) are provided.
7, 90a, 90b) can be provided more evenly distributed around the central axis A of the case.

As a result, the strength of the case lid 25a can be made more uniform than in the first embodiment, and the compressor can be prevented from being damaged. is there.

Next, a third embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The second sealed terminal 91b of this embodiment is smaller than those of the first and second embodiments. Then, the switching valve section 28 is further inclined at the center line (b) than the second embodiment, and the magnetic force switching section 5 is tilted.
5 (actuator) is brought close to the second sealed terminal 91b.

As a result, the degree of freedom in installing the switching valve portion 28 is further improved as compared with the second embodiment. Therefore, the mounting position of the valve base 32 can be further moved downward in the drawing.

As a result, the first and second sealed terminals 9
1a, 91b and the valve base 52 can be positioned on a substantially isosceles triangle or an equilateral triangle.
There is an effect that the strength of 5a can be made more uniform.

The present invention is not limited to the first to third embodiments, but can be variously modified without changing the gist of the invention. For example, in the above embodiment,
Although the rotatably provided valve body 53 is rotatably driven by switching the magnetic force of the magnetic force switching unit 55, the present invention is not limited to this, and another rotary drive mechanism (actuator) may be used. You may do it.

For example, a driven gear may be fixed to the outer peripheral surface of the valve body 53 instead of the magnet member 54, or the driven gear 5
3 is formed directly with driven teeth, which are provided with a drive gear.
The motor may be driven by a motor.

In the above embodiment, the magnet member 5
4 is bonded to the valve body 53, and the valve body 53 is urged against the valve base by the spring 78. However, the present invention is not limited to this.

For example, a holding member for holding the lower surface of the valve member 53 and the magnet member 54 combined without bonding is provided, and by urging the holding member upward, the valve member 53 and the magnet member The valve body 53 may be integrated with the valve base 53 and pressed against the valve base 52.

Further, in the above embodiment, the valve base 5
The concave groove 52a provided on the outer peripheral surface at the upper end of 2 has a semicircular cross section, but is not limited to this. For example, a rectangular shape as shown in FIG. A wedge shape as shown in FIG. In short, any shape may be used as long as it has a function of engaging with the claw 115a of the holder 115 of the test gas introduction tube.

In the above embodiment, a DC brushless motor is used as the motor unit 27.
The present invention is not limited to this, and may be a single-phase motor.

In the above embodiment, the fluid compressor is a two-cylinder rotary compressor having two cylinders 35 and a roller 40. However, the present invention is not limited to this. For example, a one-cylinder rotary compressor having only one roller 40 may be used.

Also, the turning scroll blade and the non-turning scroll are used.
And a scroll type compressor which forms a compression space by combining with a rotary blade and swirls the swirl scroll with respect to the non-swirl scroll to compress the fluid in the compression space. . In short, it is sufficient that the inside of the case is filled with the compressed high-pressure fluid.

In the above-described embodiment, the rotary switching valve of the present invention is a four-way switching valve. However, the present invention is not limited to the four-way switching valve. As appropriate, a three-way switching valve, a five-way switching valve or a six-way switching valve may be used.

[0187]

As described above, the first aspect of the present invention relates to a cylindrical closed case having one end and the other end closed in the axial direction, and a case provided in the case. A compressor unit for compressing the low-pressure fluid sucked from outside and discharging the compressed high-pressure fluid into the case; an electric motor unit provided in the case to drive the compressor unit; A rotary switching valve that is provided in the case and that switches a high pressure fluid discharge pipe to the outside of the case and a low pressure fluid suction pipe to the compressor section by rotating a valve body; A valve base for the rotary directional control valve, which is disposed on one end wall of the case and dispersed around the central axis of the case and fixed through the case; A fluid compressor including a power supply terminal and a power supply terminal for the drive motor.

According to such a configuration, the piping of the switching valve can be simplified by using the rotary type, and the gas balance at the time of stop can be easily and quickly achieved. Further, since the strength of one end wall of the case can be made uniform, there is an effect that the reliability against an increase in the pressure in the case can be improved.

In the second and third aspects of the present invention, since the actuator is disposed close to one of the two terminals, the degree of freedom in the position where the valve base is provided is increased, and −
There is an effect that the strength of the one end wall can be made more uniform.

In the fourth invention, of the three ports opened to the inside and outside of the case of the valve base, two ports opened to the case at the time of cooling or heating are replaced with other ports. Since it is provided so as to be closer to the center axis of the case than one port, there is an effect that the lubricating oil scattered in the case can be effectively prevented from being discharged to the outside of the case.

Further, the fifth invention is a case in which an HFC-based refrigerant having a high sound transmission property, which is an alternative refrigerant to the CFC refrigerant or the HCFC refrigerant, is used as the fluid to be compressed. Since the collision noise at the time is small and the switching valve is housed in the case, the effect of noise reduction is particularly large.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a plan view showing a switching valve unit,
(B) is a cross-sectional view taken along line II of (a), (c) is a side view of (a), (d) is a cross-sectional view taken along line III-III of (b), and (e) is ( Sectional drawing which follows the II-II line of a).

FIG. 3 is a plan view, a side view, and a bottom view showing a valve base of the switching valve unit.

FIG. 4 is a plan view, a side view, and a front view showing a magnetic force switching unit.

FIG. 5 is a plan view, a side view, and a bottom view showing the valve body.

FIG. 6 is a plan view and a longitudinal sectional view showing a magnet member.

FIG. 7 is a top view of the compressor.

FIG. 8 is a process chart showing a switching operation of the switching valve unit.

FIG. 9 is an enlarged longitudinal sectional view showing an upper end of a valve base.

FIG. 10 is a valve base showing another embodiment of the first embodiment.
FIG.

FIG. 11 is a top view showing the compressor of the second embodiment.

FIG. 12 is a top view showing a compressor according to a third embodiment.

FIG. 13 is a longitudinal sectional view showing a conventional four-way valve.

FIG. 14 is a longitudinal sectional view showing the compressor.

[Explanation of symbols]

Reference numeral 25: case, 26: compressor part, 28: switching valve part (rotary four-way switching valve), 52: valve base, 52a: concave groove (engaging part), 53: valve body, 54: magnet Member, 55: magnetic force switching unit (actuator), 59: first connection port, 60:
Low pressure gas discharge port, 61 ... second connection port, 62 ...
Outdoor heat exchanger 63, indoor heat exchanger 66, concave groove (communication groove), 91a first sealing terminal (power supply terminal for electric motor), 91b second sealing terminal (for switching valve) , A ... the central axis of the case.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideaki Tsuchiyama 336 Tatehara, Fuji City, Shizuoka Prefecture Inside the Toshiba Fuji Plant (56) References JP-A-4-254085 (JP, A) JP-A-60-182371 (JP, A) JP-A-5-263071 (JP, A) JP-A 60-124595 (JP, U) JP-A 3-114681 (JP, U) JP-A 56-149935 (JP, U) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) F25B 31/02 F04B 39/00 101 F04B 39/10 F25B 41/04

Claims (6)

(57) [Claims] 1. A cylindrical closed case having one end and the other end closed in an axial direction, and a low-pressure fluid provided in the case, which is sucked from outside the case and compressed. A compressor section for discharging the high-pressure fluid afterward into the case; an electric motor section provided in the case to drive the compressor section; and a motor section provided in the case and rotating the valve element. By doing so, a rotary switching valve for switching the discharge pipe of the high-pressure fluid to the outside of the case and the suction pipe of the low-pressure fluid to the compressor section, and one end wall of the case to the center axis of the case. A valve base for the rotary switching valve, which is disposed around and fixed through the case, includes a power supply terminal for the switching valve and a power supply terminal for the motor unit. A fluid compressor characterized by the following. 2. The fluid compressor according to claim 1, wherein the rotary switching valve comprises: a valve base fixed to one end wall of the case; and an inner side of the valve base of the valve base. A valve body rotatably provided on the surface of the valve; and an actuator fixed to the valve base and provided in the case and rotatably driving the valve body. A fluid compressor, wherein the compressor is disposed at a position close to a power supply terminal for a switching valve fixed to one end wall of the case or a power supply terminal for the motor unit. 3. The fluid compressor according to claim 1, wherein the rotary switching valve comprises: a valve base fixed to one end wall of the case; and an inner side of the valve base of the valve base. A valve body rotatably provided on the surface of the valve; and an actuator fixed to the valve base and provided in the case and rotatably driving the valve body. The power supply terminal is arranged at a position close to a terminal, which is one of the smaller terminals, of the power supply terminal for the switching valve fixed to one end wall of the case or the power supply terminal for the motor unit. And a fluid compressor. 4. The fluid compressor according to claim 1, wherein the rotary switching valve is provided on a valve base attached to the case, and provided on the valve base. Three ports opening on the inner and outer surfaces of the case case; a valve element rotatably provided on the inner surface of the case where the three ports open on the valve base; A communication groove provided on a surface of the body facing the valve base and selectively communicating two adjacent ones of the three ports by rotating the valve body by a predetermined angle; The valve base is provided with a through-hole for allowing another port to communicate with the inside of the case, and an actuator for driving the valve body to rotate. The case is such that two ports located at both ends in the circumferential direction of one port are closer to the center axis of the case than the other port. Fluid compressor, characterized in that it is fixed. 5. The fluid compressor according to claim 1, wherein a valve base of the rotary switching valve is engaged with a connection pipe for a gas leak test on an outer peripheral surface exposed outside the case. A fluid compressor having an engaging portion that engages. 6. The fluid compressor according to claim 1, wherein the fluid filled in the case is an HFC-based refrigerant.