JPH07310662A - Fluid compressor - Google Patents

Abstract

PURPOSE:To simplify a piping by a method wherein an oil separating plate is arranged at the upper end of a drive shaft and a rotary type switching valve to effect switching between a delivery piping for high pressure fluid to the outside of a case and a suction piping for low pressure fluid to a compressor part through rotation of a valve body is arranged at the inner upper part of the case in such a state to be positioned facing the upper surface of the oil separating plate. CONSTITUTION:A compressor part 26, an electric motor part 27 to drive the compressor part 26, and a switching valve part 28 are arranged in the closed case 25 of a fluid compressor at a lower end, a middle part, and an upper part, respectively, in the direction of height. A disc-form oil separating plate 51 is fixed to the upper end of a shaft 32 fitted in the rotor 31 of the electric motor part 27 and by forcing lubricating oil, delivered in the case 25, into collision with the under surface of the oil separating plate 51, the lubricating oil is flied for separation. The switching valve part 28 consists of a four-way switching valve arranged facing the upper surface of the oil separating plate 51. A valve body 53 is driven by the switching valve part 28 in a way that a magnetic force is exerted on a magnet member 54, fixed to the outer edge in a radial direction, of the valve body 53, by a magnetic force switching part 55, and a flow passage is switched.

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 that performs both cooling and heating, the flow of a working fluid (refrigerant) flowing between an indoor heat exchanger and an outdoor heat exchanger is switched between cooling and heating. A four-way valve device is provided.

As such a four-way valve device, generally,
The one indicated by 1 in FIG. 12 is widely used. The four-way valve device 1 includes a valve main body 2, a high pressure gas introduction pipe 3 and a low pressure gas discharge pipe 4 connected to the valve main body 2, and a sliding valve provided in the valve main body 2. It is provided with first and second connecting pipes 6 and 7 which communicate with the low-pressure gas discharge pipe 4 or the high-pressure gas introduction pipe 3 by switching of 5.

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

As a device for introducing a pressure difference into the valve main 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 the first and second copper capillaries 11 and 12 made of copper connected to the first and second spaces R1 and R2, and is led out from the low pressure gas discharge pipe 4. A third capillary tube 13, which is also made of copper, is connected between the first and second capillary tubes 11 and 12.

The valve body 14 provided in the solenoid valve device 10 is shown by 15 in FIG.
By switching by the action of 6, the four-way valve device 1
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.

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. Since (high pressure) is introduced, the first,
When the low pressure is introduced into either of the second spaces R1 and R2, a pressure difference is generated between them and the sliding valve 5 is switched.

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

The first connecting pipe 6 is connected to the outdoor heat exchanger shown in FIG. 19 and the second connecting pipe 7 is
It is connected to the indoor heat exchanger indicated by 20. Next, the operation of this air conditioner will be described.

When performing the heating operation, the sliding valve 5 is placed at the position shown in FIG.
The connection pipe 7 and the high pressure gas introduction pipe 3 are communicated with each other, and the first connection pipe 6 and the low pressure gas discharge pipe 4 are communicated with each other.

As a result, the working fluid flowing in the refrigerant pipe of the air conditioner changes its state, as shown by the arrow 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 flow in this order, and this air conditioner is caused to perform heating operation.

During cooling, by switching the sliding valve 5 of the four-way valve device 1 by the solenoid valve device 10, the first connection pipe 6 and the high pressure gas introduction pipe 3 are communicated with each other, and The second connecting pipe 7 and the low pressure gas discharge pipe 4 are connected to each other. As a result, contrary to the above case, the working fluid circulates from the outdoor heat exchanger side 19 to the indoor heat exchanger 20 side, and causes this air conditioner to perform the cooling operation.

[0013]

The air conditioner equipped with the above-mentioned four-way valve device has the following problems to be solved. That is, the four-way valve device 1 and the electromagnetic valve device 10 as described above are complicated in structure and large in size, and require a large number of parts as described above. Further, the piping is complicated, and in particular, since the high-pressure gas introduction pipe 3 is connected to the discharge pipe of the compressor 18, it is easy to transmit vibration, and therefore, it may be necessary to take vibration damping measures. Further, conventionally, R has been used as a refrigerant for air conditioners.
Although an HCFC refrigerant represented by -22 was used, the CFC regulation has been started, and an HFC refrigerant is being considered as an alternative refrigerant.

This HFC-based refrigerant is a refrigerant having a property of easily transmitting sound as compared with the conventional HCFC-based refrigerant, and particularly in the above four-way valve device 1 using the reciprocating slide valve 5,
The collision noise at the time of switching operation is transmitted through the refrigerant to the indoor heat exchanger 20.
It can be considered that the noise propagates to and generates noise (abnormal noise).

On the other hand, the first to third capillaries 11 to 13 for connecting the valve body 2 and the electromagnetic valve device 10 are provided with the case 2 described above.
Since it is exposed to the outside of No. 4, it may be deformed by a small impact, resulting in malfunction.

As an invention made to solve such a problem, there is a conventional one disclosed in Japanese Patent Laid-Open No. 60-124595. As shown in FIG. 13, 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 closed case 24 that houses a compressor section 22 and an 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 the external force. Is to prevent.

However, even with such a structure, the problem that the structure is complicated and large has not been solved. Furthermore, by incorporating such a four-way valve device 1 in the case 24, The compressor itself becomes large in size, which causes a new problem that the recent tendency toward downsizing of the compressor cannot be dealt with.

Further, since the four-way valve device 1 is configured to operate with a pressure difference, it is necessary that the sliding valve 5 is always in close contact with the valve seat, and when the valve is stopped, pressure balance between pipes (gas There is a problem that it is difficult to balance.

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

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

Therefore, the degree of freedom in the installation position of the four-way valve device 1 is low, and the high-pressure gas introduction pipe 3 opening in the case 24 is separated from the central axis of the case 24.
There is a case in which it opens at a position close to the inner peripheral wall of the space 24.

The drive motor 2 is provided in the case 24.
Lubricating oil for lubricating 3 and the like is scattered in a sprayed state, and is particularly scattered in a position near the inner peripheral wall of the case 24.

For this reason, a large amount of the lubricating oil is sucked into the high-pressure gas introducing pipe 3, the amount of the lubricating oil in the case 24 is reduced, and the outdoor or indoor heat exchanger is also used. Since the lubricating oil will enter inside,
There is a problem that the heat exchange performance of this heat exchanger is deteriorated.

Further, in the conventional switching valve device 1, the sliding valve 5
As a material for, a plastic with low heat resistance was adopted. There is no problem when the switching valve device 1 is arranged outside the case 24, but when it is mounted inside the case 24, the inside of the case 24 is heated to a considerably high temperature. That is, when the switching valve device 1 is welded to the case 25, a considerable amount of heat is transmitted to the sliding valve 5 through the valve main body 2 and the plastic having low heat resistance is reliable. It is sometimes inferior to.

That is, there is a possibility that the sliding valve 5 may lose its adhesion to the valve body 2 due to thermal deformation, and the sliding valve 5 may crack to reduce its strength or cause gas leakage. There was a possibility.

The present invention has been made in view of the above-mentioned circumstances, and can simplify the piping configuration of the air conditioner, and can easily and quickly balance the pressure when the air conditioner is stopped, and An object of the present invention is to provide a fluid compressor capable of preventing the lubricating oil from flowing out of the case and having high reliability with respect to the temperature inside the case.

[0027]

SUMMARY OF THE INVENTION A first aspect of the present invention is to provide a closed case and a low-pressure fluid sucked from outside the case, which is provided in a lower part of the case and is compressed. And a compressor section for discharging the high-pressure fluid into the case, and is connected to the compressor section by a vertically extending drive shaft provided in the middle of the case in the height direction. An electric motor part for operating the compressor part by rotationally driving the drive shaft, an oil separation plate provided on the upper end of the drive shaft of the electric motor part, and an oil separation plate for the oil separation plate on the upper part of the case. It is provided facing the upper surface, and by rotating the valve body,
A fluid compressor comprising: a rotary switching valve for switching a high-pressure fluid discharge pipe to the outside of the case and a low-pressure fluid suction pipe to the compressor section.

A second invention is the fluid compressor of the first invention, wherein the switching valve is provided on the valve base attached to the upper wall of the case and the valve base. Of the valve base, at least two ports located at both ends of the valve base are open to the inside and outside of the case, and three ports facing the oil separation plate are provided. A valve body rotatably provided on the inner side surface of the case where the three ports are opened and a surface of the valve body facing the valve base, and the valve body is rotated by a predetermined angle. By doing so, a communication groove that selectively communicates two adjacent ones of the three ports with each other, and a through hole that is provided in the valve body and that allows another one port to communicate with the inside of the case. A fluid compressor comprising a hole and an actuator for rotationally driving the valve body.

A third aspect of the invention is a fluid compressor according to the first aspect, wherein the fluid filled in the case is an HFC type refrigerant. A fourth aspect of the invention is a closed case and a compressor provided in the case for compressing a low-pressure fluid sucked from outside the case and discharging a compressed high-pressure fluid into the case. And a disc-shaped valve element attached to one end wall of the case and located inside the case, and rotating the disc-shaped valve element around the central axis thereof to discharge the high-pressure fluid outside the case and the above-mentioned pipe. A rotary type switching valve for switching the suction pipe of the low pressure fluid to the compressor section, wherein the rotary type switching valve is a permanent magnet attached to the valve body,
The actuator is arranged on the outer side of the valve body in the radial direction, is formed in an arc shape along the outer peripheral surface of the valve body, and has an actuator for rotating the valve body by attraction / repulsion with the permanent magnet. A fluid compressor characterized by the above.

[0030]

According to the first aspect of the invention, the rise of the lubricating oil scattered in the case is blocked by the oil separating plate, and the centrifugal force of the oil separating plate causes the lubricating oil to move to a high pressure inside the case. It separates from the fluid and is blown outward in the radial direction of this case.

In the second aspect of the invention, the two ports of the switching valve, which serve as high-pressure fluid suction ports, communicate with the position facing the upper surface of the oil separation plate, so that the suction of the lubricating oil is reduced. be able to.

In the third invention, the HFC having a high sound propagating property.
When a system refrigerant is used, the oil separation plate also functions as a sound insulation plate. According to the fourth aspect of the invention, since the actuator can be made compact, the degree of freedom in installing the rotary switching valve is improved.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 25 is a closed case. The hermetic case 25 has a cylindrical shape whose lower end is closed,
A lid 25a is attached to the upper end opening.

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

On the other hand, in the closed case 25, the compressor section 2 is provided at the lower end in the height direction, the middle part and the upper end, respectively.
6, an electric motor unit 27 that drives the compressor unit 26 to perform a compression operation, and a switching valve unit 28 that is a main part of the present invention.
(The rotary switching valve of the present invention).

The configuration of each part will be described below. The electric motor section 27 is a DC brushless motor composed of a stator 30 fixed to the inner surface of the hermetic case 25 and a rotor 31 arranged inside the stator 30. is there. The rotor 31 is shrink-fitted on the upper portion of the drive shaft shown by 32 in FIG.

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

The lower end of the drive shaft 32 is vertically spaced from the drive shaft 32 by a predetermined distance and is separated from each other by a distance of 1 mm.
Two crank parts 32 provided with a phase shift of 80 °
a is formed.

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

The shaft 32 has a first bearing member 37 (main bearing) fixed to the partition member 33.
And a second bearing member 38 (sub-bearing) that closes the upper and lower ends of the two cylinders 35, 35 by the first bearing member 37, and is rotatably supported around the vertical axis.

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

Therefore, 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 partitioning 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
2 is a roller 4 by means of a spring indicated by 43 in the figure.
It is urged toward the 0 side (the central direction of the cylinder 35) and moves in and out of a blade groove (not shown) provided in the cylinder 35 so that its tip always comes into contact with the outer peripheral surface of the roller 40. Has become.

Suction passages 44 for sucking the refrigerant gas into the compression space 41 and discharge ports for discharging the compressed refrigerant gas (discharge gas) are provided on both sides of the blade 35 of the cylinder 35. And a passage is formed. The suction passage 44 is shown only in the upper cylinder 35.

In the suction passage 44, 45 are respectively provided.
The suction pipe indicated by (4) is connected, and the suction pipe 45 is extended to the outside of the closed case 11 and is connected to the gas-liquid separator indicated by 46 in the figure.

On the other hand, the discharge passage is a first passage that opens from the first discharge valve 47 provided in the flange portion of the first bearing member to the upper portion of the case 25 through the muffler 48. , The second discharge valve 49 provided on the flange portion of the second bearing member 38 communicates with the muffler 50. From the muffler 50, the cylinder 35, the intermediate plate 34, the first
And a second passage that penetrates through the bearing member 37 and also opens 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 turning of the roller 40, the case is passed through the discharge passage including the first and second passages.
It is adapted to be discharged into the upper portion of the spray 25. That is, the inside of the case 25 is kept at a high pressure by the high pressure discharge gas.

On the other hand, at the lower end of the hermetic case 25,
Lubricating oil is stored. An unillustrated fine hole 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 the lower end of the shaft 32.

The lubricating oil sucked up into the shaft 32 is discharged into the compressor portion 26 through the pores,
The sliding parts of the compressor part 26 are lubricated. A disc-shaped oil separating plate 51 is fixed to the upper end of the shaft 32. The lubricating oil discharged into the case 25 is
It collides with the lower surface of the oil separating plate 51 and scatters in the case 25.

Further, due to the centrifugal force generated by the rotation of the oil separating plate 51, the oil separating plate 51 is blown to the inner peripheral wall side of the case 25 so as to be separated from the high pressure fluid in the case 25 and each of the motor parts 27. The sliding parts are lubricated.

Then, the lubricating oil which has finished the lubrication of each sliding portion is collected in the lower end portion of the case 25, and the sliding portions of the electric motor portion 27 and the compressor portion 26 are lubricated again. It has become.

On the other hand, 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 portion 28 will be described with reference to FIGS.

The switching valve unit 28 is a four-way switching valve,
As shown in FIG. 1, a valve base 52 which is fixed by penetrating through the upper wall of the lid portion 25a of the hermetic casing 25, and the valve base 5
A valve body 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 an outer peripheral edge portion of the valve body 53, and a magnetic force applied to the magnet member 54. Is provided with a magnetic force switching unit 55 (actuator) for switching the flow path to drive the valve body 53, and a holder 56 for covering the switching valve unit 28.

As shown in FIG. 3, the valve base 52 has a circular shape in a plan view, and has a lower end portion with a collar portion 52a having a diameter larger than that of the upper end portion. As shown in FIG. 1, the valve base 52 is fixed by penetrating the upper wall of the lid 25a that closes the upper end of the hermetic case 25.

That is, a first mounting hole 57 is formed in the upper wall portion of the lid portion 25a so as to penetrate the sealing case 25. And this valve base 52 is
By inserting the upper end side into the first mounting hole 57, it is attached to the lid portion 25a, and the first portion is attached by, for example, welding.
The mounting hole 57 is fixed so as to airtightly close.

Further, as shown in FIG. 3, this valve base 5
2 is provided on the central axis L of the valve base 52,
A central shaft 58 having a lower end protruding into the case 25 is fixed. Then, the valve base 52 is provided around the central axis 58 at 90 ° intervals in the circumferential direction.
Three ports 59 to 61 are provided so as to pass through 2 in the axial direction.

The port 60 located at the center of the three ports 59 to 61 is a low pressure connected to the 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. 12 and 13)), and the other two ports 59 and 61 sandwiching this low pressure gas discharge port 60 are shown in FIG. 62, 6
First and second connection ports (6, 7 in the conventional example) connected to the indoor heat exchanger and the outdoor heat exchanger shown in FIG.
Is equivalent to).

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

This stopper 64 is shown in FIGS.
As shown in (b), the upper end portion is attached to the valve base 52 by screwing. Also, this stopper 6
The portion of the valve base 52 protruding from the lower surface of the valve base 52 has an outer diameter slightly smaller than the widths of the three ports 59 to 61.

The valve body 53 is attached to the lower surface of the valve base 52 thus formed, as shown in FIG. 2 (b). This valve body is made of a heat-resistant non-magnetic metal such as aluminum, brass, or zinc.

The valve body 53 has a central hole 53a provided at the center thereof, and the central shaft 58 projecting from the valve base 52 is inserted into the central hole 53a, so that the upper surface of the valve body 53 is covered with the valve base 52. Of the valve base 52 and is rotatably attached to the valve base 52.

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

As shown in the drawing, the recessed groove 66 is a passage having an inner surface formed in a semicircular cross section, and when the valve body 53 is rotated 90 °, the recessed groove 66 shown in FIG. ~
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 are connected.
The switches 61 can be switched to communicate with each other.

As shown in FIG. 5, the valve body 53 and the valve base 52 are hermetically sealed around the recessed groove 66 on the upper surface of the valve body 53. 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 in the valve body 53 at a position symmetrical with respect to the concave groove 66 and the central hole 53a. The through hole 67 is provided in a shape similar to the concave groove 66 in a plan view.

Further, as shown in FIG. 2B, the lower end protruding portion of the stopper 64 provided on the valve base 52 has the valve body 53 attached to the valve base 52. It is located in the through hole 67.

The stopper 64 is shown in FIG.
As shown in FIG. 5, the valve body 53 is brought into contact with one end or the other end in the circumferential direction of the through hole 67 to move the valve body 53 in the rotating direction by 90 °.
It has come to be regulated in the range of. Also, this valve body 5
By rotating 3 in the range of 90 °, 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 recessed groove 66 and the through hole 67, the first connection port 59 communicates with the through hole 67 as shown in FIGS. 8 (a) and 8 (b). In this case, the second connection port 61 and the low-pressure gas discharge port 60 are communicated with each other by the recessed groove 66.

Further, as shown in FIGS. 9 (c) and 9 (d),
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 recessed groove 66. It is like this.

The through hole 67 is formed in the case 25.
Since it is opened inside, it has the same effect as the high-pressure gas introduction pipe 3 (shown in FIGS. 12 and 13) in the conventional example.

Further, as shown in FIG. 5, the upper end portion of the valve body 53 is a flange-shaped flange portion 53b protruding slightly outward in the radial direction of the valve body 53. A positioning projection 68 that engages with the magnet member 54 is formed at a predetermined position along the lower surface circumferential direction of the flange portion 53b.

As shown in FIG. 2B, the magnet member 54 is a thin-walled cylindrical collar 69 that is externally inserted on the lower end side of the valve body 53, and a permanent member fixed to the outer surface of the collar 69. And a magnet 70.

A part of the collar 69 in the circumferential direction is shown in FIG.
69a is provided with a slit, and this slit 69
By matching and engaging a with the protrusion 68 provided on the valve body 53, the valve body 53 and the valve body 53 are combined so as not to rotate relative to each other.

Further, as shown in FIG.
0 is divided into two at 180 ° intervals, and each of the N pole portions 70
a and an S pole portion 70b, the magnetic force switching portion 55
It is adapted to be driven by the suction / repulsive force by the (actuator of the present invention).

As shown in FIG. 2 (d) and FIG. 4, the magnetic force switching section 55 has a pair of strip-shaped iron-made stations 72 provided in parallel with each other and a base of the station 72. It is composed of an iron core 73 installed between the end portions, and an electromagnet 74 formed by applying a coil winding to the iron core 73.

The tip portion of the step 72 has the valve body 53.
The permanent magnet 70 is bent along the outer peripheral surface of the permanent magnet 70, and the radius of the bending is larger than the outer diameter of the permanent magnet 70 so that the inner surface has a predetermined minute gap with the outer peripheral surface of the permanent magnet 70. Is also set slightly larger.

The tips of the two stations 72 are arranged at an angle of about 90 ° to each other along the bending direction of the station 72.
It is set so as to be separated at an angle of. The magnetic force switching unit 55 can magnetize the tip portion of the station 72 to a predetermined polarity by applying a direct current to the electromagnet 74, and by switching the magnetism, the attraction with the permanent magnet 70 can be obtained. The valve body 53 is rotationally driven by the repulsive action.

On the outside of the tip portion of the stay 72, a holder 56 is provided in FIGS. 2 (b) to 2 (e). The holder 56 is a thin-walled cylindrical member,
The upper end is fixed to the lower surface of the outer edge of the flange 52a of the valve base 52.

In this holder 56, (c) and (d) in FIG.
As shown in FIG.
Notch 5 for taking out the side) out of the holder 56
6a is provided. The holder 56 is configured to position and prevent rotation of the magnetic force generator 55 by the notch 56a.

On the other hand, at the lower end of the holder 56 and the lower end of the central shaft 58 which extends downward from the valve base 52 through the valve body 53, FIG. 2B and FIG. The pressing member indicated by 77 is fixed to e).

The pressing member 77 is formed in the shape of a strip plate, and both longitudinal end portions thereof are fixed to the lower end of the holder 56 by welding and the central portion is fixed to the lower end of the central shaft 58.

Further, a spring 78 shown in the drawing is inserted between the central portion of the pressing member 77 and the lower surface of the valve body 53 in the axially compressed state, and the valve body 53 and the magnet member 54 are inserted. Is pressed against the lower surface of the valve base 52.

The urging force of the spring 78 is such that the compressor is not operating, that is, the switching valve portion 28.
In the state where no pressure is applied to the valve body 53, the strength is such that a minute gap is allowed to be generated between the upper surface of the valve body 53 and the lower surface of the valve base 52 due to the weight of the valve body 53. Has been adjusted.

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

Then, the upper end portion of the valve base 52 is inserted into the first mounting hole 57 provided in the lid portion 25a of the hermetic case 25 and welded and fixed. Then, the valve body 53 to which the magnet member 54 is bonded is attached to the central shaft 58 of the valve base 52, and the magnetic force switching portion 55 is attached. Finally, the pressing member 77 is compressed by the spring 78 and the central shaft 58 and the holder 56.
Secure to the bottom edge of.

On the other hand, as shown in FIGS. 1 and 7, the lid portion 25a is provided with a second and a second side portions of the first mounting hole 57 to which the valve base of the switching valve portion 28 is mounted. Three mounting holes 90a and 90b are provided. These second and third mounting holes 90a and 90b are provided with first and second sealed terminals (power supply terminal for drive motor and power supply terminal for switching valve portion) shown by 91a and 91b in the figure. Second and third mounting holes 9
0a and 90b are attached airtightly.

Next, the valve base 52 will be described with reference to FIG.
The relationship between the first and second connection ports 59 and 61 provided on the shaft and the oil separation plate provided on the upper end of the shaft will be described.

The above-mentioned first and second connection ports 59 and 61.
Are provided so as to be located on a concentric circle centered on the central axis A of the case 25. That is, the first,
The second connection ports 59 and 61 are arranged closer to the central axis A than the other ports 60 (low pressure gas introduction ports) provided on the valve base 52. There is.

As shown in the figure, the first and second ports 59 and 61 provided on the valve base 52 are inside the outer shape of the oil separating plate 51 in plan view. It is supposed to be located.

Further, as shown in the schematic view of FIG. 8, the through hole 67 formed in the valve body 53 has a 90
Even when it is rotated within the range of 0 °, it is always opened at a position overlapping the oil separating plate 51, and the first or second connecting port 59, 61 is selectively opened in the case 25. Communicate with the inside.

Therefore, the high pressure fluid located directly above the oil separating plate 51 is sucked into the first and second connecting ports 59 and 61. Next, the first and second sealed terminals 91a and 91b will be described. The first and second sealed terminals 91a and 91b are provided in the magnetic force switching section 55 of the electric motor section 27 and the switching valve section 28.
The wiring for feeding power to the outside of the case 25 is taken out.

The first sealed terminal 91a is a case 25.
Three first to third inner terminals 92 to 94 protruding inward
And three first to third outer terminals 96 to 98 connected to the respective terminals and projecting outside the case 25.

The second sealed terminal 91b is a pair of inner terminals 95, 95 which also project into the case 25.
And a pair of outer terminals 99, 99 connected to the respective terminals and protruding outside the case 25.

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

That is, when assembling this compressor, the switching valve portion 28 and the first and second sealed terminals 91a and 91b are assembled to the lid portion 25a, and first, the second sealed terminal 91b is assembled. 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 28.

Then, the cover 25a is attached to the case 25.
1 to 1 of the first sealed terminal 91a when attached to
The first connector 100 derived from the third inner terminals 92 to 94 and the first connector 100 derived from the electric motor unit 27
The connector 100 is connected.

On the other hand, the first and second sealed terminals 91a,
The external terminals 96 to 99 of 91b are connected to the control unit indicated by 103 in the figure. The control unit 103 includes an inverter circuit 105 that drives the electric motor unit 27 of the compressor and a control circuit 108 that drives the switching valve unit 28.

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

That is, energization from the AC power source 107 to the electromagnet 74 of the magnetic force switching section 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 to energize the phototriac 110 at the zero cross point and output the result.

As a result, the magnetic force switching section 28 can switch the magnetism of the pair of stations 72 between the N pole and the S pole (FIGS. 9 (a) and 9 (c)), and generate the magnetic force. It can also be stopped (FIGS. 9B and 9D).

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

Next, the control (operation) of the air conditioner having the above-described compressor will be described. First, the 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. 9 (a). As a result, the station located on the upper side in the figure
72 is magnetized to the N pole, and the lower station 72 is S
Magnetized to poles.

Therefore, the S pole portion 70b of the magnet member 54 fixed to the valve body 53 is located at the upper side in the figure.
72, and the N pole portion 70a is located on the lower side.
It is sucked by 72, and thereby the valve body 53 rotates counterclockwise.

When rotated by a predetermined angle, as shown in FIG. 9 (a), a stopper 64 protruding from the lower surface of the valve base 52 comes into contact with one end of the through hole 67 of the valve body 52 in the circumferential direction, The valve body 53 stops. As a result, the second connection port 61 and the low-pressure gas discharge port 60 communicate with each other through the recessed groove 66, and the first connection port 59.
Is released into the closed case 25 through the through hole 67.

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

At this time, the lubricating oil supplied to the compressor section 26 and the electric motor section 27 is sprayed in the case together with the high-pressure fluid. However, the lubricating oil is prevented from rising above the height of the oil separating plate 51 by the oil separating plate 51, and is separated from the high-pressure fluid by the rotation of the oil separating plate 51.

As described above, the first connection port 5
9 and the through hole 67 are located opposite to the upper surface of the oil separating plate 51 (FIG. 8A), the high pressure fluid flowing into the first connecting port 59 is the lubricating oil. It becomes a state that hardly contains.

The high-temperature 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 indoor space. 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 upper valve body 53, and the low pressure gas discharge port 6 is provided.
0, and is introduced from the low-pressure gas discharge port 60 into the compressor section 26 in the case 25 through the suction pipe 45 of the compressor.

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

During the cooling operation after the switching of the valve body 53 to the cooling side by the control shown in FIG. 9 (a), the switch section 108 has the waveform shown in FIG. 9 (b). It is controlled as shown in the figure. That is, the applied voltage is controlled to 0, and the pair of stage 7
2 is not magnetized.

Even in such a state, the above-mentioned step 7
Since 2 is made of iron (magnetic material), the state of FIG. 9A can be maintained by the attraction force with the magnet member 54. At this time, the concave groove 66 is formed.
The inside is at a lower pressure than the inside of the case 25, so the case
Due to the pressure in the space 25, the valve body 53 and the valve base 52 are
And are in close contact with each other so that they cannot be easily displaced.

On the other hand, when stopping the cooling operation, the electric motor 28 is stopped. As a result, Case 2 above
Since the pressure inside 5 decreases, the valve body 53 and the valve base 5
The close contact with 2 is eliminated. Further, the spring 78 is slightly compressed by the weight of the valve body 53, and a minute gap is generated between the valve body 53 and the valve base 52, so that the first and second connection ports 59 are formed. , 61 and the pressure in the low-pressure gas discharge port 60 are balanced.

As a result, the valve element 52 can be easily driven with a low torque when switching to the heating operation described below. Next, control and operation during heating operation will be described.

During the heating operation, as shown in the waveform diagram of FIG. 9C, the voltage applied to the electromagnet 74 of the switching valve portion 28 is controlled. As a result, contrary to the case shown in FIG. 9A, 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 side in the figure.
72, and the south pole portion 70b is located on the lower side.
The valve body 53 is sucked by 72, whereby the valve body 53 is rotated clockwise.

When rotated by a predetermined angle, as shown in FIG. 9 (c), the stopper 64 projecting from the lower surface of the valve base 53 comes into contact with the other end of the through hole 67 of the valve body 52 in the circumferential direction. The valve body 53 is stopped.

As a result, the first connection port 59 and the low-pressure gas discharge port 60 communicate with each other through the recessed groove 66, and the second connection port 61, contrary to the cooling operation. 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 high pressure fluid is filled in the case 25 by the operation of the compressor section 26, and the pressure causes the valve body 53 to move the valve base 53. -It is brought into close contact with the lower surface of the sleeve 52.

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

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

During the heating operation, the applied voltage to the electromagnet 74 is controlled to 0 as in the cooling operation (FIG. 9 (d)). However, even in such a state, since the station 72 is made of iron (magnetic material), the state of FIG. 9C can be maintained by the attraction force with the magnet member 54. Has become. At this time, since the pressure inside the concave groove 66 is lower than the pressure inside the case 25, the pressure inside the case 25 causes the valve body 53 and the valve base 52 to be airtightly adhered to each other. However, it cannot be moved easily.

Further, the sprayed lubricating oil scattered in the case 25 is the oil separating plate 51 as in the cooling operation.
It is less likely that it will be blocked by and separated from the high-pressure fluid and will flow into the second connection port 60. (Fig. 9
(B)) According to the configuration described above, there are the effects described below.

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, the high pressure gas pipe is not required. Further, as a result of this, the anti-vibration measures conventionally required for high-pressure gas pipes are no longer necessary.

Further, unlike the pilot type of the conventional example, this switching valve section 55 does not use an electromagnetic valve device for actuation, and therefore the capillary tube required for the conventional switching valve (see FIGS. 12 and 13). 11 to 12) shown in FIG.

Therefore, there is an effect that a compressor having a built-in switching valve can be easily assembled and an air conditioner having a simple structure and less vibration can be obtained. Secondly, there is an effect that the compressor can be downsized.

That is, the switching valve portion 28 incorporated in the case 25 of this compressor is of a rotary type unlike the conventional example, and since it does not have an electromagnetic valve device for operation, its entire length. Can be made smaller.

Further, when the compressor is stopped, the valve element 5 is
Since 3 is slightly lowered by its own weight, the close contact with the valve base 52 is eliminated, and the valve body 53 can be rotationally driven with low torque.

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

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. Therefore, the size of the compressor can be reduced in recent years. There is an effect that it is possible to sufficiently cope with the tendency.

Thirdly, the welding portion for attaching the switching valve portion 28 to the case 25 can be made small, and the reliability of the gas leak and the workability of welding work 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 drive type, the pipes are arranged in series. Therefore, the welding length with the case 24 is long, and there is a problem in terms of airtightness.

However, in the present invention, each of the above-mentioned pipes has a circular valve base 5 whose upper portion is projected outside the case 25.
It is attached to No. 2 circumferentially. Therefore, in order to attach the switching valve portion 28 to the case 25, the valve base described above is used.
Only the case 28 needs to be welded to the case 25, the welding length is shortened, and there is an effect that reliability against gas leak and welding workability are improved.

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

However, in the case of the present invention, at the time of stop, the valve body 53 is slightly lowered by its own weight, and the valve base 53 is lowered.
The gap with the sleeve 52 is enlarged. Therefore, all the ports 59 to 61 provided on the valve base 52 are connected to the valve body 5.
Since they communicate with each other through a gap formed between the upper surface and the upper surface of 3, the gas can be quickly balanced.

During operation, the valve body 53 is pressed against the valve base 52 by the pressure in the case 25 and comes into close contact therewith, so that no compressed gas leak occurs, and It is designed to be held so as not to easily move in the turning 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 quickly performed, and the injection of the refrigerant and the like can be performed for the gas balance. There is an effect that it can be done quickly without waiting for time.

Fifth, there is an effect that the electric power for controlling the switching valve portion 28 can be reduced. That is, since the stay 72 is made of iron, the stay 72 is not magnetized except when the valve body 52 is driven.
The switching position can be maintained by the attraction force between the magnet member 54 and the magnet member 54.

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 section 55 during operation, so that power consumption can be reduced. .

Sixth, it is possible to effectively prevent the sprayed lubricating oil scattered in the case 25 from being discharged to the outside of the case 25 through the switching valve device 28. That is, in the configuration of the conventional example (FIG. 13), 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 low, and it is close to the inner wall surface of the case 24. It may be a position.

Therefore, the sprayed lubricating oil filling the case 24 is easily sucked into the switching valve device 1, and the lubricating oil is discharged to the outside of the case 24 through the four-way valve device 1. Sometimes.

However, the switching valve portion 28 (four-way valve) of the present invention is small in size as described above, and the connecting ports 59 to 61 are arranged compactly 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 and 61, which are the high-pressure gas suction side during the cooling operation or the heating operation, are provided at the upper end of the drive shaft 32 of the electric motor section 27. The oil separating plate 51 is communicated with a position facing the upper surface.

That is, as shown in FIG.
The through hole 67 for communicating the second connection ports 59 and 61 with each other in the case 25 is provided at the time of cooling operation (FIG. 7A) and heating operation (FIG. 2B). Since the opening is always made to overlap with the oil separating plate 51,
It is possible to reduce the amount of the lubricating oil discharged through the first and second connection ports 59 and 61 to the outside of the case.

Therefore, the amount of lubricating oil in the fluid compressor can be kept constant, and the heat exchange capacity of the heat exchanger can be prevented from lowering. Seventh, it is possible to obtain a fluid compressor with a built-in four-way valve that is highly reliable against the temperature inside the case.

That is, in the conventional reciprocating compressor or the like, the sliding valve is made of plastic having low heat resistance. There is no problem when the switching valve is provided outside the case of the compressor, but when the switching valve portion 28 is provided in the case 25 as in the present invention, the case is provided. Since the temperature inside the space 25 becomes considerably high and the temperature at the time of welding is conducted to the switching valve 28 when the switching valve portion 28 is welded to the case 25, it is reliable for a plastic having low heat resistance. It may be inferior in sex.

However, in the present invention, the valve body 53 is formed of a non-magnetic metal such as zinc, brass or aluminum having high heat resistance. Further, since the valve body 53 is pressed against the valve base 52 by the high pressure in the case to keep the airtightness, there is little problem in preventing gas leakage.

Therefore, there is an effect that a highly reliable operation can be performed with respect to the temperature inside the case 25. 8th
In addition, there is an effect that noise generated when an HFC-based refrigerant that is a CFC substitute refrigerant is used as the refrigerant can be reduced. That is, according to 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 that occurs in the case of the reciprocating type, and the switching valve portion 28 is built in the case 25. Even if noise is generated, it is possible to effectively prevent the sound from leaking to the outside due to the muffler effect of the case 25 (which has a large capacity and is shielded from the outside).

Further, since the oil separation plate 51 and the switching valve portion 28 are provided at the position where they overlap with each other, the oil separation plate 51 also functions as a sound insulating plate, and the noise generated in the compressor portion 26 and the electric motor portion 27 causes the pipe to flow. It can be effectively prevented from being transmitted and leaking to the outside.

Therefore, the present invention exerts a particularly remarkable effect when the HFC type refrigerant which is the alternative refrigerant is used. Next, a second embodiment of the present invention is shown in FIG.
Will be described with reference to. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The second embodiment relates to an improvement of the actuator of the switching valve unit 28, that is, the magnetic force switching unit 55. In the present invention, the switching valve portion 28 is
Since it is provided at a position overlapping the oil separation plate 51 in plan view,
It is conceivable that the interference between the switching valve portion 28 and the oil separating plate 51 causes a problem that the height of the compressor cannot be reduced.

When it is desired to reduce the outer diameter of the case 25 to reduce the size of the compressor, interference between the magnetic force switching section 55 of the switching valve section 28 and the inner wall surface of the case 25 is a problem. It is possible that

Therefore, in the second embodiment, the switching valve portion has a shape as shown in FIGS. That is, in the first embodiment, the base ends of the stations 72, 72 of the magnetic force switching section 55 are provided so as to be parallel to each other, but in the second embodiment, the stations 72, 72 are provided.
The base end of 72 is opened in a fan shape around the central axis 58 of the valve base 52, and the arc-shaped electromagnet 115 is arranged along the outer diameter of the valve base 52 and the valve body 53 in the meantime. Provided. .

The electromagnet 115 includes an iron core 116 having an arcuate center line and the first core wound around the iron core 116.
The coil 117 has the same number of turns as in the above embodiment. Since the electromagnet 115 has the coil 117 having the same number of turns as the electromagnet 74 of the first embodiment, it produces substantially the same magnetic force as the electromagnet 74 of the first embodiment.

With such a structure, the length of the iron core 116 can be increased, so that the outer diameter of the electromagnet 115 can be reduced when the windings having the same number of turns are provided. Therefore, the height of the switching valve portion 28 can be reduced.

Further, the electromagnet 115 is connected to the valve base 5
Since it is arranged to follow the outer shape of No. 2, this switching valve unit 28
It is possible to make the device compact. As a result, the height of the compressor can be reduced while preventing the interference between the switching valve portion 28 and the oil separating plate 51, and the switching valve portion 28 can be made compact. There is an effect that the case 25 can be downsized.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to (a). In the third embodiment, unlike the second embodiment, the base ends of the stays 72 are provided in parallel with each other. Further, an electromagnet indicated by 118 in the figure is provided between the base end portions of the above-mentioned stations 72.

The electromagnet 118 comprises an iron core 119 linearly provided and a coil 120 wound around the iron core 119. The longitudinal cross section of the iron core 119 has an oval shape that is long in the horizontal direction. The outer peripheral length of the iron core 119 is substantially the same as that of the iron core 73 of the first embodiment. The number of turns of the coil 120 is the same as that of the first embodiment.

As a result, the electromagnet 118 generates the same magnetic force as in the first embodiment.
The thickness of 18 can be reduced because the iron core 119 has an oval shape.

As a result, since the height of the switching valve portion 28 can be reduced, it is possible to prevent the switching valve portion 28 from coming close to the oil separating plate 51 and reduce the height of the compressor, as in the second embodiment. Can be achieved.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to (b). On the other hand, in the fourth embodiment of the present invention, the outer shape of the electromagnet 122 shown in the drawing is made slightly elliptical, and the height of the electromagnet 122 is set to the above-mentioned lid portion 25.
It was made to be close to the upper wall of a. That is, the distance h1 from the upper wall of the lid portion 25a to the center of the iron core 123 of the electromagnet 122 is less than half the distance h2 from the upper wall of the lid portion 25a to the lower end of the switching valve portion 28. Was set.

According to this structure, the electromagnet 12
By bringing 2 closer to the upper wall of the lid 25a, the height of the switching valve portion 28 can be reduced. As a result, similar to the third embodiment, it is possible to prevent the switching valve portion 28 and the oil separating plate 51 from approaching each other,
This has the effect of reducing the height of the compressor.

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

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 a driven tooth may be directly formed on the valve body 53, and a driven gear having a drive gear may be provided. It may be driven by a computer.

In the one embodiment, the magnet member 5 is used.
4 is adhered to the valve body 53 and the valve body 53 is biased by the spring 78 against the valve base, but the invention is not limited to this.

For example, a holding member for holding the lower surface of the valve body 53 and the magnet member 54, which are combined without being adhered, is provided, and the holding member is biased upward so that the valve body 53 and the magnet member 54 are urged upward. 54 may be integrated and the valve body 53 may be pressed against the valve base 52.

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

Further, in the above-mentioned one embodiment, the fluid compressor is a two-cylinder type rotary compressor having two cylinders 35 and rollers 40, but it is not limited to this. For example, it may be a one-cylinder type rotary compressor having only one roller 40.

Further, the swirl scroll blade and the non-swirl scroll
It may be a scroll type compressor which forms a compression space by combining with a wing and swirls the swirl scroll with respect to the non-swirl scroll to compress the fluid in the compression space. . The point is that the case can be filled with the high-pressure fluid after compression.

Further, in the above-mentioned one embodiment, the rotary type switching valve of the present invention is a four-way switching valve, but it is not limited to this, and it is appropriate according to the machine to which this fluid compressor is applied. It may be a three-way switching valve, a five-way switching valve, or a six-way switching valve.

[0170]

As described above, the fluid compressor according to the first aspect of the present invention is provided with a closed case and a low pressure fluid which is provided in the lower part of the case and sucked from the outside of the case. A compressor section that compresses and discharges the compressed high-pressure fluid into the case, and a compressor provided by a drive shaft that is provided in the middle of the case in the height direction and extends vertically. And an oil separating plate provided on the upper end of the drive shaft of the electric motor unit, and an upper portion of the casing. A rotary type which is provided so as to face the upper surface of the oil separation plate and which switches 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 by rotating the valve body. And a switching valve.

Further, in the second invention, the switching valve is provided on the valve base attached to the upper wall of the case, and the switching valve is provided on the valve base. Three ports open to the inside and outside surfaces of the case, a valve body rotatably provided on the inside surface of the case where the three ports of the valve base open, and a valve body of the valve body. Provided on the surface facing the valve base,
The valve body is provided with a communicating groove for selectively communicating two adjacent ones of the three ports by rotating the valve body by a predetermined angle and another port provided on the valve body. It is characterized by comprising a through hole communicating with a position facing the upper surface of the oil separation plate in the case, and an actuator for rotationally driving the valve body.

With such a structure, the piping of the four-way switching valve can be simplified, and the gas balance at the time of stop can be easily and quickly achieved. Further, there is an effect that the reliability with respect to the rise in the case internal pressure can be improved.

Further, of the three ports which are opened on the inner and outer surfaces of the case of the valve base, two ports which are opened in the case during cooling or heating are provided on the upper surface of the oil separating plate. Since it can be communicated with a position opposite to, the lubricating oil scattered in the case can be effectively prevented from being discharged to the outside of the case through the two ports.

According to the third aspect of the invention, even when an HFC type refrigerant having a high sound propagating property is used as the liquid, the oil separating plate also functions as a sound insulating plate, so that noise can be reduced. There is an effect that can be done. According to the fourth invention, there is an effect that the degree of freedom in installing the switching valve is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a view showing a switching valve portion of FIG.
(B) is a sectional view taken along line I-I of (a), (c) is a side view of (a), (d) is a sectional view taken along line III-III of (b), and (e) is taken along line II-II of (a). Sectional view.

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

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 of the valve body.

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

FIG. 7 is likewise a top view of the compressor.

FIG. 8 is a process diagram showing the switching operation of the switching valve section.

FIG. 9 is a circuit diagram showing a control circuit of the same.

10A and 10B are a plan view and a cross-sectional view showing a switching valve portion of another embodiment.

FIG. 11 is a vertical cross-sectional view showing a switching valve portion of another embodiment.

FIG. 12 is a vertical cross-sectional view showing a conventional four-way valve.

FIG. 13 is likewise a vertical cross-sectional view showing a compressor.

[Explanation of symbols]

25 ... Case, 26 ... Compressor section, 28 ... Switching valve section (rotary four-way switching valve), 52 ... Valve base, 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.

Front page continued (72) Inventor Hideaki Tsuchiyama 336 Tatehara, Fuji City, Shizuoka Prefecture, Toshiba Corp., Fuji Factory (72) Inventor Hiroyuki Mizuno 336 Tatehara, Fuji City, Shizuoka Prefecture, Toshiba A & V Co., Ltd. (72) ) Inventor Toshihiko Funakura 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba ABY Co. Ltd.

Claims (4)

[Claims] 1. A closed case, and a low-pressure fluid which is provided at a lower part of the case and which is sucked from the outside of the case is compressed, and a high-pressure fluid after compression is discharged into the case. And a compressor section that is provided in the middle of the case in the height direction, and is connected to the compressor section by a drive shaft that extends in the up-down direction. An electric motor section for operating the machine section, an oil separating plate provided on the upper end of the drive shaft, and an upper part of the case facing the upper surface of the oil separating plate to rotate the valve element. Thus, the fluid compressor is provided with a rotary switching valve for switching the high-pressure fluid discharge pipe to the outside of the case and the low-pressure fluid suction pipe to the compressor section. 2. A fluid compressor according to claim 1, wherein the rotary switching valve is provided on a valve base attached to an upper wall of the case, and the valve base is provided on the valve base. The valve base is open to the inside and outside of the case, and at least two ports located at both ends are opposed to the oil separation plate. Three ports are provided, and the valve base described above. A valve body rotatably provided on an inner side surface of the case where three ports are opened, and a valve body provided on a surface of the valve body facing the valve base, and the valve body is rotated by a predetermined angle. Thus, a communication groove for selectively communicating two adjacent ones of the three ports with each other, and a through hole provided in the valve body for communicating another one of the ports with each other in the case. And an actuator that rotationally drives the valve element, and a fluid compressor. 3. The fluid compressor according to claim 1, wherein the fluid filled in the case is an HFC refrigerant. 4. A hermetically sealed case, and a compressor section provided in the case for compressing the low pressure fluid sucked from outside the case and discharging the compressed high pressure fluid into the case. And a disc-shaped valve element attached to one end wall of the case and located inside the case, is rotated around its central axis to discharge the high-pressure fluid to the outside of the case and the compression. A rotary type switching valve for switching the suction pipe of the low pressure fluid to the machine section, wherein the rotary type switching valve is arranged outside the permanent magnet attached to the valve body and in the radial direction of the valve body. At the same time, the fluid compressor includes an actuator formed in an arc shape along the outer peripheral surface of the valve body, and rotating the valve body by attraction and repulsion with the permanent magnet.