JP3327671B2 - Fluid compressors and air conditioners - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a four-way valve for switching a flow path of a working fluid (refrigerant) of an air conditioner, and a fluid compressor used in the air conditioner. is there.

[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. 11 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. It operates by the pressure difference.

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 with first and second copper capillaries 11 and 12 connected to the first and second spaces R1 and R2, respectively, and is led 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 second connection pipe 7 and the high-pressure gas introduction pipe 3 are communicated by positioning the slide valve 5 at the position shown in the figure.
The first connection pipe 6 communicates with the low-pressure gas discharge pipe 4.

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 outdoor heat exchanger 20 side, contrary 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, a refrigerant for an air conditioner is R
Although HCFC-based refrigerants represented by −22 have been used, chlorofluorocarbon 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 slide 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.

As an invention made to solve such a problem, there is a conventional one disclosed in Japanese Patent Application Laid-Open No. Sho 60-124595. The present invention relates to a compressor of the type shown in FIG. 12, 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 needs to be always kept in close contact with a 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.

The present invention has been made in view of such circumstances, and can simplify a piping configuration of an air conditioner and can easily and quickly balance pressure at the time of stoppage of a fluid compressor. And an air conditioner.

[0021]

SUMMARY OF THE INVENTION The present invention provides a sealed case, a low-pressure fluid provided in the case, which is sucked from the outside of the case, and a compressed high-pressure fluid. A compressor section for discharging into the case, and a high pressure fluid discharge pipe to the outside of the case and a low pressure fluid to the compressor section are provided by rotating a valve body provided in the case. Contact to the fluid compressor having a rotary type four-way switching valve for switching the suction pipe
The rotary four-way switching valve is mounted on the case.
And a valve base provided on the valve base.
Three ports opening on the inner and outer surfaces of the case, and the valve base described above.
The inner surface of the case where the above three ports are open
And the valve base of the valve body is opposed to the valve base of the valve body.
Is provided on the surface to be rotated, and the valve body rotates by a predetermined angle.
Two of the three ports are selectively communicated with each other.
And one other port provided in the valve body and
And a permanent magnet, which communicates the
A pair of magnetic pieces arranged opposite to each other and a pair of magnetic pieces.
Connected to the sex piece and
Magnetizing a pair of magnetic pieces with different polarities, or
Switch its polarity and open the valve via the permanent magnet.
A magnetic force generating part for rotating and rotating the valve body with respect to a valve base;
And biasing means for biasing the biasing means.
When the compressor is stopped, the force is applied between the valve body and the valve base.
Is set strong enough to allow a gap between
ing.

Further, the present invention has a compressor, an indoor heat exchanger, a decompression device, and an outdoor heat exchanger which are sequentially connected to a pipe, and the indoor heat exchanger from the compressor,
In an air conditioner having a four-way valve for switching a refrigerant flow path to a decompression device and an outdoor heat exchanger, the compressor includes a case filled with high-pressure refrigerant after compression, and the four-way valve includes: the Ke - provided in the scan, Ri rotary four-way selector valve der having a valve body for switching the flow path of the refrigerant by rotation, the rotary four-way switching valve, said Ke - taken to scan
A valve base to be mounted and a valve base provided on the valve base.
Three ports opening to the inner and outer surfaces of the case of the base;
On the inner surface of the case where the above three ports of the valve base are open
A valve element rotatably provided and the valve base of the valve element;
Is provided on a surface facing the valve, and the valve element rotates by a predetermined angle.
This allows two of the three ports to selectively
A communication groove to be communicated with, provided in the valve body, another one
A through hole for communicating the port into the case, a permanent magnet,
A pair of magnetic pieces arranged opposite to the permanent magnet;
When connected to a pair of magnetic pieces and a predetermined voltage is applied,
These pairs of magnetic pieces are magnetized to different polarities, respectively.
Or by switching its polarity, and
A magnetic force generating portion for rotating and driving the valve body, and a valve base
Biasing means for biasing the
When the compressor is stopped, the biasing force of
− The strength is set to a degree that allows a gap to
Is defined .

Further, the present invention relates to a sealed case.
And a low level provided inside the case and sucked from outside the case.
While compressing the pressurized fluid, the compressed high-pressure fluid is placed in the case.
And a valve body provided in the case,
The high pressure fluid is discharged from the case by rotating
And switch the low pressure fluid suction pipe to the compressor section
And a rotary four-way switching valve, wherein the rotary four-way switching valve has a valve base attached to the case.
A base, three ports provided on the valve base and open to the inside and outside of the case of the valve base, and a case where the three ports of the valve base open. A valve body rotatably provided on the inner surface of the valve, and a valve body provided on a surface of the valve body facing the valve base. two and communicating groove for selectively communicate with each other, provided in the valve body, the other one port - opposed to the through hole for communicating within the scan, and the permanent magnet, to the permanent magnet - the door Ke And a pair of magnetic pieces that are connected to the pair of magnetic pieces and are magnetized to have different polarities by applying a predetermined voltage, or the polarities thereof are switched, and are switched via the permanent magnet. the valve body; and a magnetic force generator that makes driving rotation Te, the magnetic force generating unit, electrostatic
A magnet is provided, and the electromagnet includes
Detecting the temperature in the case based on the resistance value of the coil winding
Temperature detecting means is connected .

Further, according to the present invention, the pipes are sequentially connected.
Compressor, indoor heat exchanger, decompression device, outdoor heat exchanger
Having, and the indoor heat exchanger from the compressor,
Fourth, switching the refrigerant flow path to the decompression device and outdoor heat exchanger
In an air conditioner having a two-way valve, the compressor is
A case to be filled with the subsequent high-pressure refrigerant.
The four-way valve is provided in the above-mentioned case, and is pivoted.
Rotary four-way cut with a valve body for switching the flow path of the refrigerant
The rotary type four-way switching valve is installed in the above case.
A valve base to be mounted and a valve base provided on the valve base.
Three ports opening to the inner and outer surfaces of the case of the base;
On the inner surface of the case where the above three ports of the valve base are open
A valve element rotatably provided and the valve base of the valve element;
Is provided on a surface facing the valve, and the valve element rotates by a predetermined angle.
This allows two of the three ports to selectively
A communication groove to be communicated with, provided in the valve body, another one
A through hole for communicating the port into the case, a permanent magnet,
A pair of magnetic pieces arranged opposite to the permanent magnet;
When connected to a pair of magnetic pieces and a predetermined voltage is applied,
These pairs of magnetic pieces are magnetized to different polarities, respectively.
Or by switching its polarity, and
A magnetic force generator for rotating the valve body.
The generator includes an electromagnet, and the electromagnet includes
Based on the resistance value of the coil winding of this electromagnet,
Temperature detecting means for detecting the temperature is connected .

[0025]

[0026]

[0027]

[0028]

[0029]

According to such a structure, the piping configuration can be simplified by providing the flow path switching valve in the case filled with the compressed high-pressure fluid. And since it is a rotary type flow path switching valve, the flow path of the fluid introduced into a compressor can be changed by rotating a 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, at the time of stop, the pressure in the pipe can be balanced by separating the valve body from the valve base. Further, by measuring the resistance value of the coil of the electromagnet driving the valve element of the switching valve, the temperature in the case can be known.

On the other hand, the fluid compressor and the air conditioner can be controlled by the simplified wiring and control circuit by connecting the wiring from the magnetic force switching unit and the motor unit to the same sealed terminal.

Further, this fluid compressor can be operated by an HFC-based refrigerant which is a substitute for Freon. In this case, the switching valve in the case is operated to switch between heating and cooling. It can be performed.

[0033]

An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 25 denotes a closed case. Inside the sealed case 25, a compressor section 26, a motor section 27 for driving the compressor section 26 and performing a compression operation are provided at a lower end portion, a middle portion and an upper end portion in the height direction. A switching valve section 28 (rotary four-way switching valve), which is a main part of the present invention, is provided.

The configuration of each section will be described below. 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 lower end of the drive shaft 32 is
It extends into the compressor section 26. At the lower end of the drive shaft 32, there are formed two crank portions 32a which are provided at predetermined intervals in the vertical direction and are provided with a phase shift of 180 ° from each other.

The compression mechanism 26 is held by a partition member 33 fixed to the case 25, and is connected to two cylindrical cylinders vertically through an intermediate plate 34 shown in FIG. 35, 35 are provided. The two cranks 32a of the drive shaft 32 are located in the two cylinders 35, 35, respectively.

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.

In the suction passages 44, 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.

Next, the switching valve section 28 will be described with reference to FIGS. As shown in FIG. 1, the switching valve portion 28 includes a valve base 52 fixed to the sealing case 25.
A valve member 53 rotatably provided on the lower surface of the valve base 52 for switching the flow path of the working fluid; a magnet member 54 fixed to a radially outer edge of the valve member 53; A magnetic force switching unit 55 that switches the flow path by driving the valve body 53 by applying a magnetic force to the switching unit 54, and a holder 56 that covers the switching valve unit 28.

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

That is, a through hole indicated by 57 in the figure is formed in the upper wall of the lid 25a. The valve base 52 is attached to the lid portion 25a by inserting the upper end side into the through hole 57 , and is fixed to hermetically close the through hole 57 by, for example, welding. It 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.

As shown in FIG. 1, a port 60 located at the center of the three ports 59 to 61 is a low pressure port connected to a suction pipe 45 extending from the compressor section 26. It is a gas discharge port (corresponding to 4 in the conventional example (FIG. 11)), and the other two ports 59 and 61 sandwiching the low-pressure gas discharge port 60 are shown in FIGS. The first and second connection ports (corresponding to 6 and 7 in the conventional example) are connected to the indoor heat exchanger and the outdoor heat exchanger indicated by.

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.

As shown in FIG. 2B, the valve body 53 is attached to the lower surface of the valve base 52 thus formed. The upper surface of the valve body 53 is placed on the lower surface of the valve base 52 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. The valve base 52 is abutted and rotatably mounted on 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.

A seal member 66a for sealing the space between the valve body 53 and the valve base 52 is provided on the upper surface of the valve body 53 around the concave groove 66. Base 52
And are formed integrally with it.

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.

Further, as shown in FIG. 2B, the lower end protruding portion of the stopper 64 provided on the valve base 52 has a structure in which the valve body 53 is 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, the first connection port 59 communicates with the through hole 67 as shown in FIGS. 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 formed in the case 25.
Since it is opened to the inside, it has the same function as the high-pressure gas introduction pipe 3 (shown in FIG. 11) in the conventional example.

As shown in FIG. 5, the upper end of the valve body 53 is formed as a flange 53b which protrudes 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. 2B, the magnet member 54 has a thin-walled cylindrical collar 69 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.
Driven by the suction / repulsion force of the

As shown in FIG. 2D and FIG. 4, the magnetic force switching section 55 includes a pair of strip-shaped iron-made 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 distal end of the stay 72, a holder indicated by 56 in FIGS. 2 (b) to 2 (e) 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 center shaft 58 which extends downward from the valve base 52 through the valve body 53 are shown in FIGS. In e), a pressing member indicated by 77 is fixed.

The pressing 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.

Further, 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, 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 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 portion 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.

Next, the upper end of the valve base 52 is connected to the through-hole 5 provided in the lid 25a of the sealing case 25.
7 and welded and fixed. Thereafter, the valve element 5 having the magnet member 54 adhered to the center shaft 58 of the valve base 52
3 and the magnetic force switching unit 55 is assembled. Finally, the pressing member 77 is fixed to the center shaft 58 and the lower end of the holder 56 while compressing the spring 78.

[0076] On the other hand, the above-mentioned lid portion 25a, as shown in FIGS. 1 and 7, through a pair on the side of the switching valve 28
Hole 90 is provided with, the through holes 90, 91a in the figure, the first indicated by 91b, the second closed terminals, these
The through hole 90 is attached in a manner to hermetically close it.

The sealed terminals 91a and 91b are for taking out wiring for supplying power to the electric motor unit 27 and the magnetic force switching unit 55 of the switching valve unit 28 to the outside of the case 25.

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

The second sealed terminal 91b is formed of 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 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.

Then, 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.

Accordingly, the wiring derived from the first to third outer terminals 96 to 98 of the first sealed 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 55 can switch the magnetism of the pair of stays 72 between the N pole and the S 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 an in-case temperature detecting section 113 for detecting the temperature in the case 25. The temperature detecting unit 113 is connected to, for example, the third and fourth external terminals 98 and 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 to detect 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.

[0091] After the rotation of the valve base 53 by a predetermined angle, a stopper 64 projecting from the lower surface of the valve base 53 comes into contact with one end of the through hole 67 of the valve body 52 in the circumferential direction, as shown in FIG. 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
After passing through the through hole 67 provided in the valve body 53, it flows into the first connection port 59, and sequentially changes the state of the indoor heat exchanger 62, the expansion valve, and the outdoor heat exchanger 63. While passing, it cools the room.

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

[0094] Fluid introduced into the compressor unit 26 is compressed by the compressor unit 26 again the Ke - discharged to the scan 25. Then, the air is again introduced into the indoor heat exchanger 62 from the first connection port 59 through the through hole 67 of the switching valve portion 28, and circulates in the pipe of the air conditioner.

During this time, the switch unit 108
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-mentioned 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 electric motor 27 is stopped. As a result, the above case 2
5, the pressure in the valve base 53 and the valve base 5 are reduced.
The state of close contact with 2 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.

As a result, the driving of the valve body 53 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.

After the rotation by a predetermined angle, as shown in FIG. 8C, a stopper 64 projecting from the lower surface of the valve base 52 comes into contact with the other end of the through hole 67 of the valve body 53 in the circumferential direction. 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. The lower surface 52 is brought into close contact with the lower surface.

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

Then, 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 from the low-pressure gas discharge port 60 to the case. To the compressor section 26 in the compressor 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, since the pressure in the concave groove 66 is lower than that in the case 25, the pressure in the case 25 causes the valve body 53 and the valve base 52 to tightly adhere to each other. And cannot be moved easily.

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, unlike the conventional pilot type, the switching valve portion 28 does not use an electromagnetic valve device for actuation, so that the capillary tube (FIGS. 11 and 12) required for the conventional switching valve is used. 11 to 12) shown in FIG.

Therefore, it is easy to assemble the compressor incorporating the switching valve, and it is possible to obtain an air conditioner with a simple structure and a small vibration. Second, it is possible to reduce the size of the compressor. There is an effect that can be done.

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 solenoid valve device for operation. The overall length 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 a large driving torque is required. Therefore, in the present invention,
The magnetic force switching unit 55 can be reduced in size.

With these features, 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.

[0114] In addition, since the total length of the connection portion between the through hole of the lid 25a of the case 25 and the valve base 52 can be shortened, the welded portion can be reduced, and the reliability for gas leakage can be reduced. And the workability of welding work are also improved.

Third, 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.

During operation, the pressure in the case 25 causes the valve body 53 to be pressed against and adhere to 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 promptly 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 and the like are long for the gas balance. There is an effect that can be performed quickly without waiting for time.

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

Therefore, unlike the conventional example in which the position of the slide 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. .

Fifth, the magnetic force switching unit 5 of the switching valve unit 28
Since the temperature in the case 25 is detected by the temperature detecting unit 113 in the case based on the resistance value of the coil winding of No. 5, no dedicated wiring is required.

On the other hand, the sealing terminal 91 and the switching valve portion 28 are provided integrally with the lid portion 25a, and the first and second connectors 1 and 2 are provided.
When the cover 25a is attached, the connection between the sealed terminal 91, the motor 27 and the switching valve 28 is made by using the pins 00 and 101.

As a result, the wiring structure can be simplified, and the sealing of the case 25 and the assembling property can be improved. Sixth, there is an effect that noise generated when an HFC-based refrigerant that 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, the switching valve portion 28 is made to be a rotary type, so that a switching collision sound generated in the case of a reciprocating type is generated. Can be reduced.

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 , a particularly remarkable effect is exhibited when an HFC-based refrigerant, which is a CFC substitute refrigerant, is used.

The present invention is not limited to the above embodiment, but can be variously modified without changing the gist of the invention. For example, in the above-described embodiment, as the rotary valve, the rotatable valve body 53 is rotatably driven by the magnetic force switching of the magnetic force switching unit 55, but is not limited to this. Another rotation drive mechanism may be used.

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 54 are urged upward. The valve body 53 may be integrated with the valve base 53 and pressed against the valve base 52.

Further, the control circuit 108 for operating the switching valve section 28 is not limited to the one shown in FIG. For example, a configuration as shown in FIG. 9 may be used. In this circuit, one terminal (the third inner terminal 94 and the outer terminal 98) connected to the motor unit 27 and one terminal (one of a pair of inner terminals 99) connected to the switching valve unit 28 are connected. The inner terminal 95 and the outer terminal 99) are common terminals, and a single sealed terminal 91 is provided with a total of four inner terminals 92 to 95 and outer terminals 96 to 99.

The outer terminal 96 of the sealed terminal 91
The wiring derived from .about.98 is connected to an inverter circuit 105 for controlling the motor unit 27. Each transistor provided in the inverter circuit is connected to an inverter control unit (not shown). The inverter circuit is connected to an AC power supply 107.

In this case, there is an effect that the wiring structure of the compressor can be simplified. That is, when a structure is adopted in which the switching valve portion 28 is built in the case 25 of the compressor, generally, as shown in FIG.
It is conceivable that the wiring for controlling the motor section and the wiring for controlling the switching valve section are separately taken out of the case 25.

However, with such a structure, a large number of through holes for taking out the wiring must be provided in the case 25, which causes a problem of lowering the hermeticity of the case 25, and Wiring work can also be cumbersome.

In the case where the motor unit 27 incorporated in the case 25 is a DC brushless motor as in the above embodiment, three wires for the motor unit 27 and the electromagnetic force of the switching valve unit 28 are provided. A minimum of five wires, two for the valve, is required.

However, in the above-described configuration, the wiring for the motor unit 27 and the wiring for the switching valve unit 27 are combined into one sealed terminal 91. Also, one of the three terminals for the electric motor unit 27 and one of the two terminals for the switching valve unit 27 are commonly used as one terminal, and the control unit is used as four terminals. A control circuit for this is provided in 103.

As a result, the wiring structure of the compressor can be simplified, and the sealing in the case and the assembling can be improved. In the above-described embodiment, a DC brushless motor is used as the motor unit 27. However, the motor unit 27 is not limited to this, and may be a single-phase motor 115 as shown in FIG. good.

In this case, the control may be performed by a control circuit as shown in FIG. In one embodiment, the fluid compressor comprises two cylinders 35 and a low cylinder.
Although it was a twin-rotary compressor having a ram 40, it is not limited to this. For example, the roller 40 may be a single rotary compressor having only one roller.

Also, the turning scroll wing 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.

Further, in the above embodiment, not only the compressor section 28 but also the electric motor section 27 are provided in the case 25, but only the compressor section 27 and the switching valve section 28 are provided in the case 25.
The motor unit 27 may be provided outside the case 25.

[0140]

As described above, the present invention provides a closed
The discharge pipe for high-pressure fluid out of the case and the
Rotary type that switches the low pressure fluid suction pipe to the compressor and compressor section
A fluid compressor having a four-way switching valve, the cold from the compressor
It has a four-way valve for switching the medium flow path, and the four-way valve is
Installed in a sealed case that constitutes the
Air conditioner with rotary four-way switching valve with switching valve
It is a Japanese machine. Furthermore, the rotary type four-way switching valve
Means for urging the valve body against the valve base.
In addition, the urging force of this urging means, when the compressor is stopped,
To the extent that a gap is created between the valve body and the valve base
Is set to the strength of Furthermore, the above rotary square
In the switching valve, the magnetic force generating portion that rotationally drives the valve body is an
A magnet is provided, and the electromagnet includes
Detecting the temperature in the case based on the resistance value of the coil winding
Temperature detecting means is connected.

According to such a configuration, the piping of the air conditioner can be simplified. In addition, since it is a rotary switching valve, the compressor is unlikely to become large even when incorporated in a case. In addition, gas balance at the time of stoppage can be easily and quickly achieved, and the wiring structure can be simplified.
There is a Ru effect that can Ryakuka.

[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, a front view, a side view, and a vertical sectional view showing a switching valve unit.

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 a circuit diagram showing a control circuit.

FIG. 10 is a circuit diagram showing a control circuit according to another embodiment.

FIG. 11 is a longitudinal sectional view showing a conventional four-way valve.

FIG. 12 is a longitudinal sectional view showing the compressor.

[Explanation of symbols]

25 ... case, 26 ... compressor part, 28 ... switching valve part (rotary four-way switching valve), 52 ... valve base, 53 ... valve body, 54 ...
Magnet member, 55: magnetic force switching portion (magnetic force generating portion), 59: first connection port, 60: low-pressure gas discharge port, 61: second connection port, 62: indoor heat exchanger 63, outdoor heat exchanger, 66, concave groove (communication groove), 67, through hole (communication hole), 72, stay (magnetic piece), 74, electromagnet (coil winding), 113, case Temperature detecting section (case temperature detecting means).

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hideaki Tsuchiyama 336 Tatehara, Fuji City, Shizuoka Prefecture Inside the Toshiba Fuji Plant, Ltd. (56) References JP-A-4-254085 (JP, A) JP-A-5-340617 (JP, A) JP-A-61-272478 (JP, A) JP-A-60-124595 (JP, U) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) F25B 41/04 F04B 39/00-39/16

Claims (4)

(57) [Claims] 1. A closed case, and a compression 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. A rotary type four-way switch that is provided in the case and that switches a discharge pipe for high-pressure fluid out of the case and a suction pipe for low-pressure fluid to the compressor part by rotating a valve body. In the fluid compressor having a valve , the rotary four-way switching valve is provided on the valve base attached to the case and the valve base, and the case of the valve base is provided. Inside and outside
Open to 3 Tsunopo - DOO and said valve base - scan the 3 Tsunopo - DOO opens Ke - scan inside
A valve body rotatably provided on a surface thereof, and a valve body provided on a surface of the valve body facing the valve base;
By rotating the valve body by a predetermined angle, one of the three ports
And a communication groove for selectively communicating the two with each other, and another port provided on the valve body and communicating with another port in the case.
A through hole, a permanent magnet, a pair of magnetic pieces disposed opposite to the permanent magnet, and a predetermined voltage applied to the pair of magnetic pieces.
Magnetizing these pairs of magnetic pieces to different polarities
Or by switching its polarity, through the permanent magnet
A magnetic force generating portion for rotating the valve body to rotate the valve body, and biasing means for biasing the valve body against the valve base.
When the compressor stops, the urging force of the urging means is increased.
Enough to allow a gap between the valve body and the valve base.
Fluid compression characterized by being set to a high degree of strength
Machine. 2. A compressor, an indoor heat exchanger, a decompression device, and an outdoor heat exchanger sequentially connected to a pipe, and the indoor heat exchanger, the decompression device, and outdoor heat exchange from the compressor. An air conditioner having a four-way valve for switching a refrigerant flow path to a compressor, wherein the compressor includes a case filled with high-pressure refrigerant after compression, and the four-way valve is provided in the case. are, Ri rotary four-way selector valve der having a valve body for switching the flow path of the refrigerant by rotation, the rotary four-way switching valve, said Ke - and scan, - Benbe which is attached to the scan The valve base is provided on the inner and outer surfaces of the case of the valve base.
Open to 3 Tsunopo - DOO and said valve base - scan the 3 Tsunopo - DOO opens Ke - scan inside
A valve body rotatably provided on a surface thereof, and a valve body provided on a surface of the valve body facing the valve base;
By rotating the valve body by a predetermined angle, one of the three ports
And a communication groove for selectively communicating the two with each other, and another port provided on the valve body and communicating with another port in the case.
A through hole, a permanent magnet, a pair of magnetic pieces disposed opposite to the permanent magnet, and a predetermined voltage applied to the pair of magnetic pieces.
Magnetizing these pairs of magnetic pieces to different polarities
Or by switching its polarity, through the permanent magnet
A magnetic force generating portion for rotating the valve body to rotate the valve body, and biasing means for biasing the valve body against the valve base.
When the compressor stops, the urging force of the urging means is increased.
Enough to allow a gap between the valve body and the valve base.
An air conditioner characterized by being set to a high degree . 3. A sealed case and a low-pressure flow provided in the case and sucked from outside the case.
While compressing the body, the compressed high-pressure fluid is discharged into the case.
And a compressor part that is provided in the case and is rotated by rotating a valve body.
-The high pressure fluid discharge pipe to the outside and the compressor
A rotary four-way switching valve that switches the suction pipe for low-pressure fluid
In the fluid compressor, the rotary four-way switching valve is provided with a valve base attached to the case, and provided on the valve base, and provided on the inner and outer surfaces of the case of the valve base. Three ports that open, a valve element rotatably provided on the inner surface of the case where the three ports of the valve base open, and a valve base of the valve element. A communication groove provided on an opposing surface for selectively communicating two of the three ports with each other by rotating the valve body by a predetermined angle; A through-hole for communicating one of the ports into the case, a permanent magnet , a pair of magnetic pieces disposed opposite to the permanent magnet, and a predetermined voltage applied to the pair of magnetic pieces. As a result, these pairs of magnetic pieces are magnetized to different polarities, or their polarities are switched. A magnetic force generating portion for rotatingly driving the valve body . The magnetic force generating portion includes an electromagnet,
The stone has a casing based on the resistance of the coil winding of this electromagnet.
-Temperature detection means for detecting the temperature in the
A fluid compressor, characterized in that: 4. A compressor, indoor heat exchange, which is sequentially connected to a pipe.
Exchanger, decompression device, outdoor heat exchanger
The indoor heat exchanger, decompressor, outdoor heat from the compressor
Air conditioner with four-way valve for switching refrigerant flow to exchanger
In the Japanese machine, the compressor is a case in which the compressed high-pressure refrigerant is filled.
And the four-way valve is provided in the case and rotates.
Rotary four-way with a valve body that switches the flow path of the above refrigerant
A switching valve, the rotary four-way switching valve, said Ke - Benbe is attached to the scan - scan and this Benbe - provided to the scan, the Benbe - scan of Ke - scan the outer surface
Open to 3 Tsunopo - DOO and said valve base - scan the 3 Tsunopo - DOO opens Ke - scan inside
A valve body rotatably provided on a surface thereof, and a valve body provided on a surface of the valve body facing the valve base;
Among the bets - the 3 Tsunopo valve body at a predetermined angle rotation to Rukoto
And a communication groove for selectively communicating the two with each other, and another port provided on the valve body and communicating with another port in the case.
A through hole, a permanent magnet, a pair of magnetic pieces disposed opposite to the permanent magnet, and a predetermined voltage applied to the pair of magnetic pieces.
Magnetizing these pairs of magnetic pieces to different polarities
Or by switching its polarity, through the permanent magnet
A magnetic force generating portion for rotating the valve body, and the magnetic force generating portion includes an electromagnet, and the electromagnet is provided in the case based on a resistance value of a coil winding of the electromagnet. An air conditioner to which temperature detecting means for detecting the temperature of the air conditioner is connected.