JP3327670B2 - 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 flow path switching valve device for switching a flow path of a working fluid 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, a flow path switching for switching the flow of a working fluid flowing between an indoor heat exchanger and an outdoor heat exchanger during cooling and heating. A valve device is provided.

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

The sliding valve 5 has first and second spaces R 1, R 2 defined at both longitudinal ends of the valve body 2 by pistons 8, 9 connected to the sliding valve 5. 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 sliding valve 5 is positioned at the position shown in FIG.
The connection pipe 7 and the high-pressure gas introduction pipe 3 are connected to each other, and the first connection pipe 6 and the low-pressure gas discharge pipe 4 are connected to each other.

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

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

On the other hand, the first to third capillaries 11 to 13 connecting the valve body 2 and the solenoid valve device 10 are deformed by a slight impact, resulting in a malfunction. As an invention made to solve such a problem, there is a conventional one disclosed in JP-A-60-124595.

As shown in FIG. 14, the present invention provides a sealed case 24 for accommodating the compressor section 22 and the electric motor section 23.
The compressor is of a type in which the high-pressure discharge gas discharged from the compressor section 22 is filled. The case 24 includes the four-way valve device 1 and the solenoid valve device 10 having the above-described configuration. This eliminates the need for the high pressure gas introduction pipe 4 and prevents the capillaries 11 to 13 from being damaged by external force.

However, even with such a structure, the problem that the structure is complicated and large is not solved. Further, by incorporating such a four-way valve device 1 into the case 25, 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.

Further, since the four-way valve device 1 is configured to be operated by a pressure difference, the sliding valve 5 needs to be always kept in close contact with the valve seat, and it is difficult to balance the pressure when the valve is stopped. There is a problem that.

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

In such an air conditioner capable of cooling and heating operation, defrosting is performed by supplying the heat of the compressor directly from the bypass pipe to the outdoor heat exchanger in the frosted state during the heating operation. In this case, it is necessary to provide a switching valve device different from the four-way valve device.

However, according to this method, two switching valves are provided, which complicates the structure. In addition, since this switching valve is provided outside the case, vibration from the compressor causes this switching. Since this occurs in the connection pipe between the valve and the valve, it is necessary to take anti-vibration measures.

Further, when the defrosting switching valve is provided in the case, it is necessary to further increase the size of the case, and the number of wirings to be taken out of the case is increased, and the wiring structure is complicated. There is also the problem that

The present invention has been made in view of such circumstances, and can simplify a piping configuration of an air conditioner that performs heating, cooling, and a defrosting operation during heating.
It is an object of the present invention to provide a fluid compressor and an air conditioner that can perform a defrosting operation while continuing a heating operation with a simple configuration.

[0023]

SUMMARY OF THE INVENTIONFluid compressor
Are provided in a sealed case and in this case,
-Compress low-pressure fluid sucked from outside
A compressor section for discharging the high-pressure fluid into the case;
It is installed inside the case and rotates the valve to move it out of the case.
High pressure fluid discharge piping and low pressure fluid to the compressor section
Rotary 5-way switching valve that switches the suction pipeHave.

Further , the air conditioner of 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 five-way valve for performing a heating, a cooling and a defrosting operation by switching a refrigerant flow path to a decompression device and an outdoor heat exchanger, the compressor is filled with a high-pressure refrigerant after compression. In addition to the case, the five-way valve is a rotary five-way switching valve that is provided in the case and has a valve body that rotates to switch the flow path of the refrigerant.
There is .

In the fluid compressor or the air conditioner, the rotary five-way switching valve is provided on a valve base attached to the case and on the valve base. −
Open to the inner and outer surfaces of the case,
3 connected to the suction side of the indoor heat exchanger and compressor
Two ports and a port for a bypass pipe connected to a bypass pipe for a defrosting operation, and the three ports of the valve base.
A first valve body rotatably provided on the inner surface of the case where the port for the port and the bypass pipe are opened; and a first valve body provided on a surface of the first valve body facing the valve base. A communication groove for selectively communicating two of the three ports with each other by rotating the valve body by a predetermined angle, and another port provided in the first valve body and First and second through-holes for communicating the port for the bypass pipe to the inside of the case, and rotatably provided with respect to the first valve body, and a predetermined angle with respect to the first valve body. by rotating, ingredients and a second valve element for closing the first or the second through-hole of the first valve body
Be prepared .

Further, in the fluid compressor or an air conditioner, the rotary type five-way switching valve, the first valve body and the valve base - is provided on the scan, the first valve element of the valve First regulating means for regulating the rotation angle with respect to the base; regulating means provided on the first valve body and the second valve body for regulating the relative rotation angle within a predetermined range. By rotating the second valve body to actuate the first or second restricting means, the discharge gas from the case,
Driving means for performing five-way switching to the indoor and outdoor air conditioners, the suction side of the compressor, and the bypass pipe;
Have .

Further, in the fluid compressor or the air conditioner, the driving torque of the driving means is based on a static friction force generated between the first valve body and the valve base during the operation of the compressor section. The first valve body and the second valve
It is larger than the static friction generated between the bodies .

[0028]

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 five-way switching valve, the flow path of the fluid introduced into the compressor can be changed by rotating the first and second valve bodies. Thus, in the air conditioner having the indoor heat exchanger and the outdoor heat exchanger, switching from the cooling and heating operations and switching from the heating operation to the defrosting operation can be performed.

Further, when the valve is stopped, the pressure in the pipe can be balanced by separating the valve body from the valve base. Further, in view of the fact that the static friction generated between the valve base and the first valve element during operation is large and small during stoppage, the first valve element and the second valve element are rotationally driven. The driving torque of the driving means is adjusted, so that only the second valve body is driven during operation, and both the first and second valve bodies are driven during operation to perform five-way switching of the flow path. Can be.

[0030]

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, which is a main part of the present invention, is provided.

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

The 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 in the vertical direction via 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.

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

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

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

On the other hand, the discharge passage includes a first passage which 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 first valve body 53 rotatably provided on the lower surface of the valve base 52 for switching the flow path of the working fluid ;
Second valve element 5 also rotatably provided on the lower surface of the valve element
4, a magnet member 55 attached to the outer peripheral surface of the first and second valve bodies 53, 54, and the first and second valve bodies 53, 54 by applying a magnetic force to the magnet member 55. A magnetic force switching unit 56 that rotates and switches the flow path is provided, and a holder 57 that covers the switching valve unit 28 is provided.

As shown in FIG. 3, the valve base 52 has a circular shape in a 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 58 in the figure is formed in the upper wall of the lid 25a. The valve base 52 is attached to the lid 25a by inserting the upper end into the through hole 58, and is fixed so as to hermetically close the through hole 58 by, for example, welding. It has become.

Also, as shown in FIG.
2 is provided on the center axis L of the valve base 52,
A center shaft 59 having a lower end protruding into the case 25 is fixed. The valve base 52 is provided at intervals of 90 ° in the circumferential direction around the central axis 59.
Three ports 60 to 62 are provided to pass through the shaft 2 in the axial direction.

The port 61 located at the center of the three ports 60 to 62 is, as shown in FIG. 1, 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. 13 )), and the other two ports 60, 62 sandwiching this low pressure gas discharge port 61 are 63, 64 in the figure, respectively. 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.
A port 65 for a bypass pipe having a smaller diameter than the other ports is provided at a position apart from the valve base 52 so as to penetrate the valve base 52 in the axial direction.

This bypass pipe port 65 is shown in FIG.
Is connected, and this bypass pipe 66 is
It is connected to a pipe between the outdoor heat exchanger 64 and an expansion valve (decompressor).

The flange 52a of the valve base 52
A stopper 67 shown in FIG. 3 is protrudingly provided on the lower surface of FIG. This stopper 67 is shown in FIG.
As shown in (b), the upper end is screwed to the valve base 52 to be attached.

The lower surface of the valve base 52 thus formed is provided with the first valve body 53, as shown in FIG. The upper surface of the first valve body 53 is formed by inserting the center shaft 59 projecting from the valve base 52 into a center hole 53a provided in the center of the first valve body 53. And is rotatably attached to the valve base 52.

As shown in FIG. 5, on the upper surface of the first valve body 53, two ports (59, 60 or 6
0, 61) are provided along the circumferential direction.

As shown in the figure, the concave groove 68 is a passage having an inner surface formed in a semicircular vertical cross section.
Alternatively, as shown in FIG. 12, adjacent ports, that is, the low-pressure gas discharge port 61 (shown by a dashed line) and the first connection port 60 (shown by a dashed line), or a low-pressure gas discharge port. The first port 61 and the second connection port 62 (indicated by a chain line) are switched so as to communicate with each other.

As shown in FIG. 5, on the upper surface of the first valve body 53, the first valve body 53 and the valve base 5 are provided.
In order to hermetically seal the portion communicating with the second member 2, the seal member 68a around the concave groove 68, the seal member 69a around the first through hole 69, and the second through hole 70 are formed. Sea around
The screw member 70a is formed integrally. It will be described later.
A seal member 72a formed around the guide groove 72 is for maintaining a gap between the valve base 52 and the first valve body 53.

The first valve body 53 has the first valve body 53.
First and second through holes 6 penetrating in the axial direction of the valve body 53
9, 70 are provided at 90 ° intervals in the circumferential direction. The first and second through holes 69 and 70 are formed to have a smaller diameter than the width of the concave groove 68.

The first and second through holes 69, 7
0 indicates that the first valve body 53 is positioned around the center hole 53a by 9
By being driven to rotate in the range of 0 °, each of FIGS.
As shown in FIGS. 11 (a), 11 (a) and 12 (a), the first and second connection ports 60, 62 of the valve base 52 are provided.
(Shown by a dashed line) or the port 65 for the bypass pipe.
(Indicated by a dashed line).

When the first valve body 53 is attached to the valve base 52 at the radial outer edge of the upper surface of the first valve body 53, The guide groove 72 into which the stopper 67 projecting from the lower surface is inserted is recessed.

The guide groove 72 is provided over a range of 90 ° in the circumferential direction. When the first valve body 53 is driven to rotate, one end in the circumferential direction of the guide groove 72 and By bringing the other end into contact with the stopper 67, FIG.
As shown in FIGS. 11 (a), 11 (a) and 12 (a), the rotation range of the first valve body 53 is restricted to 90 °.

Therefore, the stopper 67 and the guide groove 7
2 together form the first regulating means of the present invention. In addition,
Based on the positional relationship between the recessed groove 68 and the first and second through holes 69 and 70, as shown in FIG. 10A, the second connection port 62 is connected to the first through hole 69. In the case of communication, the first connection port 60 and the low-pressure gas discharge port 61 communicate with each other through the recessed groove 68, and the bypass pipe port 65 is connected to the second through hole. 70.

As shown in FIG. 12 (a), when the first connection port 60 communicates with the second through hole 70, the second connection port 62 and the second connection port 62 communicate with each other. The low pressure gas discharge port 61 is connected to each other by the concave groove 68, and the bypass pipe port 65 communicates with the first connection port 69.

The first and second through holes 69, 7
Numeral 0 communicates with the case 25 unless it is closed by the second valve element 54 described later. Further, as shown in FIG. 5, the upper end of the valve body 53 is a flange-like flange 53b projecting a little outward in the radial direction of the valve body 53. This flange 53b
At a predetermined position along the circumferential direction of the outer surface on the lower end side, a first convex portion 73 for positioning engaging with the magnet member 55 is provided so as to protrude radially outward.

The first convex portion 73 is 180 ° in the circumferential direction.
Two are provided apart from each other. Next, the first valve element 5
The second valve body 54 attached to the lower surface of the third valve 3 will be described.

The second valve element 54 is as shown in FIG. 6, and passes through the first valve element 53 from the valve base 52 into a center hole 54a provided in the center thereof. By inserting the central shaft 59 protruding from the first valve body 53, the upper surface thereof is opposed to the lower surface of the first valve body 53, and is rotated with respect to the valve base 52 and the first valve body 53. Mounted freely.

On the upper surface of the second valve element 54, 76
First to third circular seal members denoted by reference numerals 78 are formed integrally with the second valve body 54 at intervals of 120 ° around the center hole 54a.

The first to third seal members 76 to 78
Are the first and second through holes 69, 7 of the first valve body 53.
They are formed to have a diameter larger than 0, so that they can be closed as required.

Between the second and third seal members 77 and 78, the second valve body 54 is axially penetrated on a concentric circle on which the seal members 77 and 78 are arranged. 1st, 2nd
Are formed.

The first and second through holes 79 and 80 are provided in the first and second through holes 6 opening on the lower surface of the first valve body 53.
The first and second through-holes 69 and 70 are formed to have substantially the same diameter as the first and second through-holes 9 and 70 so as to communicate with the inside of the case 25.

Further, as shown in FIG.
The positional relationship between the sealing member 78 and the first through-hole 79 is set so as to form an angle of 90 ° with the center hole 54a as a center, and the first sealing member 77 and the second through-hole 79 are formed. Hole 8
The positional relationship of 0 is also set to form 90 °.

Therefore, as shown in FIG.
When the second through hole 80 of the second valve body 54 faces the first through hole 69 of the first valve body 53, the second through hole 69 provided in the second valve body 54 The second seal member 77 closes the second through hole 70 of the first valve body 53.

As shown in FIG. 11B, the first through hole 79 of the second valve body 54 is provided with the first valve body 53.
Of the second through-hole 70, the second
The third seal member 78 of the valve body 54 of the first
3, the first through hole 69 is closed.

Further, on the outer peripheral surface of the second valve body 54,
A second convex portion indicated by 82 in FIG. 6 protrudes radially outward of the valve body. The second convex portion 82 engages with a slit provided in the magnet member 56 described later, and couples the second valve body 54 and the magnet member 55 so that they cannot rotate relative to each other.

As shown in the figure, the second convex portion 82 has a circumferential direction of 30 ° + α ° (α is the first convex portion 73).
Width), and is 1 mm apart from each other in the circumferential direction.
Two projections are provided at positions separated by 80 °.

As shown in FIG. 2B, the magnet members 55 are attached to the outer peripheral surfaces of the first and second valve bodies 53 and 54. As shown in the figure, the magnet member 55 includes a thin cylindrical collar 84 that is directly extrapolated to the first and second valve bodies 53 and 54, and the collar 84.
And a permanent magnet 85 fixed to the outer surface of the main body.

The upper end of the collar 84 is provided with
Is provided with a slit indicated by reference numeral 87. The slits 87 are provided with a width of 30 ° + α ° (same width as the second convex portion 82) in the circumferential direction, and two slits 87 are provided at 180 ° apart from each other in the circumferential direction of the collar 84. Have been.

The first and second valve bodies 53 and 54 have first and second projections 73 and 82 projecting from the respective outer peripheral surfaces.
Are positioned in the slit 87 as shown in FIG. 8 so as to be combined with the magnet member 55.

Therefore, the second valve element 54 and the magnet member 55 are provided so as not to rotate relative to each other, and the first valve element 53 is rotated relative to the magnet member 55 as indicated by the arrow in the drawing. It is rotatable in the direction within a range of 30 °.

Therefore, the first and second projections 73, 73
The 82 and the above-mentioned slit 87 constitute the second regulating means of the present invention. The permanent magnet 85 fixed to the outer peripheral surface of the collar 84 is divided into two at 180 ° intervals.
Each is composed of an N pole part 85a and an S pole part 85b,
It is driven by a magnetic force from the magnetic force switching unit 56.

As shown in FIGS. 2D and 4, the magnetic force switching portion 56 includes a pair of strip-shaped iron stays 88 (magnetic pieces of the present invention) provided in parallel and separated from each other. An iron core 89 is provided between the base ends of the stays 88, and an electromagnet 90 is formed by applying a coil winding to the iron core 89.

The tip of the stay 88 is bent along the outer peripheral surface of the permanent magnet 85 attached to the first and second valve bodies 53 and 54, and the bending radius is set to the inner surface. Are set slightly larger than the outer diameter of the permanent magnet 85 so as to have a predetermined minute gap with the outer peripheral surface of the permanent magnet 85.

The ends of the two stays 88 are about 90 ° from each other along the bending direction of the stays 88.
It is set to be separated at an angle of. The magnetic force switching unit 56 can magnetize the tip of the stay 88 to a predetermined polarity by applying a direct current to the electromagnet 90, and by switching the magnetism, allows the magnet to be connected to the permanent magnet 85. To generate a suction / repulsion force to rotate the valve body 53.

The driving torque for the magnet member 55 by the magnetic force switching section 56 is generated by the pressure difference between the high-pressure refrigerant and the low-pressure refrigerant during the heating and cooling operations to be described later. It is set smaller than the static frictional force between the bearing 52 and the surface 52.

The driving torque of the magnetic force switching section 56 is set to be larger than the static friction force between the first valve body 53 and the second valve body 54 during the same operation. . Therefore, at the time of heating and cooling operation, the magnetic force switching unit 56 can drive only the second valve body 54, and when the operation is stopped, the first and second valve bodies 53,
54 can be driven.

Outside the tip of the stay 88, a holder indicated by 57 in FIGS. 2B to 2E is provided. The holder 57 is a thin cylindrical member, and the upper end is fixed to the lower surface of the outer edge of the flange 52 a of the valve base 52.

The holder-57 has the same structure as that shown in FIG.
As shown in (d), a cutout portion 57a for taking out the base end side (the electromagnet 90 side) of the stay 88 out of the holder 57 is provided. The holder 57 is configured to position and prevent the rotation of the magnetic force switching unit 56 by the notch 57a.

On the other hand, the lower end of the holder 57 and the lower end of the central shaft 59 extending downward from the valve base 52 through the first and second valve bodies 53 and 54 are shown in FIG. 2
A holding member indicated by reference numeral 92 in (b) and FIG. (E) is fixed.

The holding member 92 is formed in a strip shape, and both ends in the longitudinal direction are fixed to the lower end of the holder 57 by welding, and the center is fixed to the lower end of the center shaft 59.

A spring 93 is inserted between the center of the pressing member 92 and the lower surface of the second valve body 54 in a state where it is compressed in the axial direction.
The second valve bodies 53 and 54 are pressed against the lower surface of the valve base 52.

The urging force of the spring 93 is applied to the first and second valves in a state in which the compressor is not operating, that is, in a state in which the high-low pressure difference of the refrigerant is not acting on the switching valve portion 28. The first weight is determined by the weight of the valve bodies 53 and 54.
The strength is adjusted to such an extent that a minute gap is allowed to be formed between the upper surface of the valve body 53 and the lower surface of the valve base 52.

Next, the assembly of the switching valve section 28 will be described. First, the holder 57 is attached to the valve base 52.
Is fixed. On the other hand, as described above, the first and second valve bodies 53 and 54 and the magnet member 55 are connected to the slits 87 of the collar 84 provided in the magnet member 55, respectively. First and second convex portions 73 and 7 of the bodies 53 and 54
4 (the state shown in FIG. 8) and are held in a state where they are combined with each other.

In this state, between the lower surface of the first valve body 53 and the upper surface of the second valve body 54, as shown in FIG. A gap corresponding to the thickness of the seal members 76 to 78 is defined.

Next, the upper end of the valve base 52 is inserted into the insertion hole 5 provided in the lid 25a of the sealing case 25.
8 and welded and fixed. Thereafter, the combination of the first and second valve bodies 53 and 54 and the magnet member 55 is attached to the center shaft 59 of the valve base 52, and the magnetic force switching unit 56 is attached. Finally, the pressing member 92 is pressed against the center shaft 59 while compressing the spring 93.
And it fixes to the lower end of the said holder 57.

On the other hand, as shown in FIG. 1, the lid 25a has second and third through holes 9 at the sides of the switching valve portion 28.
4a and 95b are provided. The first and second sealed terminals (terminal blocks of the present invention) indicated by 95a and 95b in the drawing are respectively provided in the second and third through holes 94a and 94b. The second and third through holes 94a and 94b are attached in a manner to hermetically close them.

The first sealed terminal 95a is for taking out the wiring for supplying power to the motor unit 27 to the outside of the case 25, and the three first terminals protruding inside the case 25. To the third inner terminals 96 to 98, and three first to third terminals connected to the respective terminals and protruding out of the case 25.
And third outer terminals 100 to 102.

The second sealing terminal 95 is for taking out the wiring for supplying power to the magnetic force switching portion 56 of the switching valve portion 28 to the outside of the case 25, and protrudes inside the case 25. A pair of inner terminals 99, 99 and a pair of outer terminals 10 connected to both terminals and protruding out of the case 25.
3 and 103.

The first to third inner terminals 96 to 98 of the first sealed terminal 95a are three leads taken out from the three-phase winding of the electric motor unit 27 (DC brushless motor). And the pair of inner terminals 9 of the second sealed terminal 95b.
Reference numerals 9 and 99 are connected to the two lead wires taken out from the switching valve section 28 via a pair of second connectors 105, respectively.

That is, when assembling the compressor, the switching valve portion 28 and the first and second sealed terminals 95a and 95b are assembled to the lid portion 25a, and a pair of the second sealed terminals 95b is assembled. The second extending from the inner terminal 99
Is connected to the same second connector 105 extended from the switching valve section 28.

Next, the lid 25a is attached to the case 25.
When attaching the first sealed terminal 95a to the first
The first connector 104 derived from the third inner terminals 96 to 98 and the second connector 104 derived from the electric motor 27
To the connector 104.

On the other hand, each of the outer terminals 100 to 103 of each of the sealed terminals 95a and 95b is connected to a control unit shown in FIG. The control unit 106 controls the first sealed terminal 95
a) a common inverter circuit (not shown) to which each of the outer terminals 100 to 102 is connected;
And a control circuit 111 to which the pair of outer terminals 103 is connected.

The control circuit 111 is configured, for example, as shown in FIG. That is, energization from the AC power supply 110 to the electromagnet 90 provided in the magnetic force switching unit 56 is as follows.
This is performed via a phototriac 112 that performs half-wave control. At this time, the microcomputer
The photo-triac 112 is determined to be output at the zero-cross point by the data 113 and the phototransistor 114 that detects the 0V (zero-cross) timing of the alternating current.

As a result, the magnetic force switching unit 56 can switch the magnetism of the pair of stays 88 between the N pole and the S pole (FIGS. 10 to 12), and can stop the generation of the magnetic force. it can.

Next, control (operation) of the air conditioner having the above-described compressor will be described. First, the state at the time of stop will be described.

At the time of stop, although not shown, the spring 93 is driven by the weight of the first and second valve bodies 53 and 54.
The first and second valve bodies 53 and 54 are slightly lowered by the amount of the urging force, and the upper surface of the first valve body 53 and the lower surface of the valve base 52 are slightly separated from each other.

In this case, the first valve body 53
The first and second connection ports 60 and 62, the low-pressure gas discharge port 61, and the bypass pipe port 65 are all in communication through a gap formed between the first and second valve bases 52 and 52. ing. Therefore, the pressure in the piping of this air conditioner is balanced.

Next, the control for performing the heating operation from this state will be described. When performing the heating operation, the control circuit 111 controls the voltage applied to the electromagnet of the switching valve section 28 as shown in the waveform diagram of FIG. As a result, the stay 88 (magnetic piece) located on the upper side in the drawing is magnetized to the S pole, and the stay 88 located on the lower side is
Magnetized to poles.

Therefore, the N pole portion 8 of the magnet member 85
5a is attracted by the stay 88 located on the upper side in the figure, and the S pole portion 85b is attracted by the stay 88 located on the lower side, whereby the magnet member 85 rotates clockwise.

As described above, the second valve element 54 is combined with the magnet member 85 so as not to rotate relative thereto. The first valve element 53 is connected to the second valve element 54.
Supported by Therefore, the first and second
The valve bodies 53 and 54 rotate together with the magnet member 85.

Then, as shown in FIG. 10 (a), if the stopper 67 projecting from the valve base 52 comes into contact with one end of the guide groove 72 of the first valve body 53 in the circumferential direction. If
Only the first valve body 53 stops rotating.

As a result, as shown in FIG.
The connection port 60 and the low-pressure gas discharge port 61 communicate with each other through a concave groove 68 provided in the first valve body 53. The second connection port 62 faces the first through hole 69 provided in the first valve body 53, and the bypass pipe port 65 is connected to the second through hole 7.
0.

Further, as shown in FIG. 10 (b), the first convex portion 73 provided on the first valve body 53 is formed in the circumferential direction of the slit 87 provided on the collar 84 of the magnet member 56. If it comes into contact with one end, the magnet member 56 and the second
Of the valve element 54 stops.

As a result, as shown in FIG.
The second through-hole 70 opening in the valve body 53 is closed by a second seal member 77 provided in the second valve body 54.

On the other hand, the first through hole 69 of the first valve body 53 is provided with the second through hole 8 provided in the second valve body 54.
It will face 0. As a result, the first
Only the second connection port 62 facing the first through hole 69 of the valve body 53 is opened into the case 25.

In this state, the motor unit 27 shown in FIG.
Activate When the electric motor 27 operates, the compression mechanism 28 operates to compress the working fluid. The compressed high-pressure fluid is discharged into the closed case 25. The high-pressure fluid filled in the sealed case 25 is
The second through hole 80 provided in the second valve body 54 and the gap between the first valve body 53 and the second valve body 54 (see
Through the first through hole 69 provided in the first valve body 53 from the gap corresponding to the thickness of the
Flows through the indoor heat exchanger 63, the expansion valve, and the outdoor heat exchanger 64 while sequentially changing the state, thereby heating the room (see FIG. 9).

The fluid that has passed through the outdoor heat exchanger 64 becomes a low-pressure fluid, flows into the first connection port 60, passes through a concave groove 68 provided in the upper valve body 53, and passes through the recess 68. It flows to the gas discharge port 61, and this low pressure gas discharge port
From the case 61 through the suction pipe 45 of the compressor.
Is introduced into the compressor section 26 in the inside.

The fluid introduced into the compressor section 26 is compressed again by the compressor section 26 and discharged into the case 25. Next, the second valve body 54
Is introduced from the second connection port 62 to the indoor heat exchanger 63 through the through hole 80 and the first through hole 69 of the first valve body, and circulates in the pipe of the air conditioner. .

During this time, the control circuit 111 is controlled as shown in the waveform diagram of FIG. That is, the applied voltage is controlled to 0, and the pair of stays 88 are not magnetized.

Even in such a state, the above-mentioned step 8
8 is made of iron (magnetic piece), so that the state shown in FIG. 10 can be maintained by the attractive force with the magnet member 55.

At this time, since the pressure in the concave groove 68 of the first valve body 53 is lower than that in the case 25, the pressure in the case 25 causes the pressure in the case 25 to decrease. Body 53
The valve base 52 and the valve base 52 are airtightly contacted with each other,
A static friction force greater than the driving torque is generated.

At this time, the second through hole 70 of the first valve body 53 communicating with the bypass pipe port 65 is closed by the second seal member 77 of the second valve body 54. As a result, no fluid flows through the bypass pipe indicated by 66 in FIGS.

As described above, the air conditioner performs the heating operation. However, if the air conditioner is operated for a long time, frost may be formed on the refrigerant flow pipe and the radiation fins of the outdoor heat exchanger 64. . When frost forms, the outdoor heat exchanger 6
Since the heat exchange efficiency of No. 4 decreases and the performance of the air conditioner decreases, it is necessary to perform a defrosting operation. Next, the defrosting operation will be described.

The defrosting operation is performed during the heating operation. That is, from the state shown in FIG. 10, the voltage applied to the electromagnet 90 of the magnetic force switching valve portion 56 is controlled as shown in the waveform diagram of FIG. Thus, contrary to the case shown in FIG. 10A, the stay 88 located on the upper side in the figure is magnetized to the N pole, and the stay 88 located on the lower side is magnetized to the S pole.

As a result, repulsion occurs between the permanent magnet 85 and the stay 88, and the magnet member 54 and the second valve element rotate counterclockwise as indicated by the arrow in FIG. 10B.
At this time, the first valve body 53 does not rotate while maintaining the state during the heating operation. That is, during the heating operation, the inside of the concave groove 68 formed on the upper surface of the first valve body 53 has a negative pressure, and the inside of the case 25 has a high pressure. The valve element 53 is strongly adhered to the lower surface of the valve base 52, and the static friction force generated therebetween is greater than the driving torque of the magnetic force switching section 56.

On the other hand, as described above, the first valve element 5
The static friction force generated between the third valve element 54 and the second valve element 54 is:
The opening area of the first and second through holes 69 and 70 of the first valve body 53 and the force corresponding to the pressure applied to the seal members 76 and 77 of the second valve body 54 that closes these through holes. Is smaller than the starting torque, so that the second
Only the valve element 54 rotates together with the magnet member 55 independently of the first valve element 53.

Therefore, as shown in FIG.
When the first projection 73 provided on the first valve body 53 comes into contact with the other circumferential end of the slit 87 provided on the collar 76 of the magnet member 55, the second valve The body 54 and the magnet member 55 stop rotating.

As described above, the driving force of the magnet member 55 by the magnetic force switching section 56 is the first driving force during the heating operation.
Is smaller than the static frictional force between the valve body 53 and the valve base 52 of the second valve body 54 and the magnet member 5.
5 will not rotate any more.

As a result, as shown in FIG. 11B, the second through hole 70 of the first valve element communicating with the bypass pipe port 65 is provided in the second valve element 54. Open in the case 25 facing the first through hole 79,
The first through hole 69 of the first valve body 53 communicating with the second connection port 62 is closed by the third seal member 78.

As a result, the high-temperature and high-pressure fluid in the case 25 flows into the bypass pipe 66 via the first through hole 79, the second through hole 70 and the bypass pipe port 65, and flows out of the case. Since it flows directly to the heat exchanger 65 (see FIG. 9), defrosting of the outdoor heat exchanger 65 is performed.

At the same time, a predetermined gap is provided between the valve base 52 and the first valve body 53 by the seal members 68a to 70a and 72a formed integrally with the first valve body 53. As a result, the high-temperature and high-pressure fluid in the case 25 flows from the gap into the second connection port 62 and flows through the indoor heat exchanger 63, so that the heating operation is continued. .

Thus, the defrosting operation of the outdoor heat exchanger 65 can be performed while the heating operation is continued. During the defrosting operation, as shown in the waveform diagram of FIG.
The power supply to the magnetic force switching unit 56 is stopped.
8 and the magnet member 55 shown in FIG.
The states shown in (a) and (b) are maintained.

When the defrosting of the outdoor heat exchanger 64 is completed, the voltage applied to the magnetic force switching unit 56 is changed again to the state shown in FIG.
Switching is performed as shown in the waveform diagram of 0 (c) to return to the original heating operation (FIGS. 10A and 10B).

On the other hand, when stopping the heating operation, the motor unit 28 is stopped. As a result, the pressure in the case 25 decreases, so that the first valve element 5
The close contact between the valve base 3 and the valve base 52 is eliminated.

Further, the spring 93 is slightly compressed by the weight of the first and second valve bodies 53 and 54, and a minute gap is formed between the valve body 53 and the valve base 52, so that The pressures in the first and second connection ports 59 and 61 and the low-pressure gas discharge port 60 are balanced (gas balance).

As described above, since the gas balance is performed quickly, the waiting time for restarting the air conditioner can be reduced. Next, control and operation during the cooling operation will be described.

During the cooling operation, the voltage applied to the electromagnet 90 of the switching valve section 28 is controlled as shown in the waveform diagram of FIG. Thereby, contrary to the case of the heating operation shown in FIG. 10, the stay 88 located on the upper side in the figure is magnetized to the N pole, and the stay 88 located on the lower side is magnetized to the S pole.

As a result, the S pole portion 8 of the magnet member 55
5b is attracted to the stay 88 located on the upper side in the figure, and the N pole portion 85a is attracted to the stay 88 located on the lower side, whereby the magnet member 55 rotates.

The second valve element 54 is provided with the magnet member 55
And the first valve body 53 is engaged with the slit 87 of the collar 84 provided in the magnet member 55, so that the first and second valve bodies 53 and 54 are It rotates together with the magnet member.

At this time, since the air conditioner is not operated, there is no difference in height and pressure, and the first valve body 53 and the valve base 52 are not in close contact with each other, and an excessive static friction force is generated. Therefore, the first valve element 53 can be easily rotated and driven even with a low torque given to the magnet member 55 by the electromagnet 90.

A stopper 67 projecting from the valve base 52 is provided with a guide groove 7 provided in the first valve body 53.
When the first valve body 53 comes into contact with the other end in the circumferential direction, the first valve body 53 stops rotating as shown in FIG.

As a result, the second connection port 62 and the low-pressure gas discharge port 61 communicate with each other through the concave groove 68, contrary to the heating operation. Then, the first connection port
The port 60 faces the second through-hole 70 provided in the first valve body 53, and the port 65 for the bypass pipe.
Faces the second through hole 69.

Further, as shown in FIG. 12 (b), the first convex portion 73 provided on the first valve body 53 is formed around the slit 87 provided on the collar 84 of the magnet member 55. If the second valve body 54 and the magnet member 55 stop rotating when they come into contact with the other end surface in the direction.

As a result, the second through hole 70 of the first valve body 53 facing the first connection port 60 is connected to the first through hole provided in the second valve body 54. It is opened into the case 25 facing the hole 79. A first through hole 69 of the first valve body 53 facing the bypass pipe port 65 is closed by a third seal member 78 provided in the second valve body 54. You.

In this state, when the operation of the electric motor section 28 is started, the compressor section 26 is operated to fill the case 25 with a high-pressure fluid, and the pressure between the pressure and the inside of the concave groove 68 is increased. The first valve body 53 is brought into close contact with the lower surface of the valve base 52 due to the pressure difference.

The high-pressure fluid in the case 25 is
First through hole 79 of second valve body 54 and seal member 76
Through the gap between the first valve body 53 and the second valve body 54 formed by the second through hole 78.
And flows into the first connection port 60. Also,
At the same time, the seal members 68a to 68a of the first valve body 53 are provided.
The high-temperature and high-pressure fluid in the case 25 flows into the first connection port 60 also from the gap between the valve base 52 and the first valve body 53 by 70a and 72a.

The air flows from the first connection port 60 to the outdoor heat exchanger 64, the expansion valve (decompression device), and the indoor heat exchanger 63 while sequentially changing the state, thereby cooling the indoor air. Do.

The fluid that has passed through the indoor heat exchanger 63 flows into the second connection port 62, passes through the recessed groove 68, and from the low-pressure gas discharge port 61 through the casing. To the compressor section 26 in the compressor 25.

During the heating operation, the voltage applied to the electromagnet 90 is controlled to 0 as in the cooling operation (FIG. 12D). However, even in such a state, since the stay 88 is made of iron (magnetic piece), the attraction force with the magnet member 55 causes the stay 88 to be in the state shown in FIGS.
State can be maintained. At this time, since the pressure in the concave groove 68 is lower than that in the case 25, the first valve body 53 and the valve base 52 are separated by the pressure in the case 25. It is airtight 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, the first or second connection port provided on the valve base is connected to the first or second connection port.
Since it can be opened directly into the case 25 through the second valve bodies 53 and 54, a high-pressure gas pipe is not required. This also eliminates the need for anti-vibration measures conventionally required for high pressure gas piping.

Further, since the switching valve section 28 does not use an electromagnetic valve device unlike the conventional switching valve section, the capillary tube required for the conventional switching valve (11 to 12 shown in FIGS. 13 and 14 ). Becomes unnecessary.

Accordingly, the compressor can be easily assembled, and an air conditioner having a simple structure and low vibration can be obtained. Second, 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 has no electromagnetic valve device. can do.

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, so that the size of the compressor in recent years has been reduced. There is an effect that can sufficiently cope with this.

In addition, since the total length of the connecting portion between the through hole 58 of the lid 25a of the case 25 and the valve base 52 is reduced, the welded portion itself is also reduced, and gas leakage is prevented. Reliability and 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 cannot be achieved, and for example, it is necessary to provide a means for gas balance in the expansion valve, or to wait a long time before the gas balance.

However, in the case of the present invention, when stopped, the first valve body 53 is slightly lowered by its own weight, and the gap with the valve base 52 is enlarged. Therefore, all the ports 60 to 62 provided on the valve base 52 communicate with each other via the gap formed between the valve base 53 and the upper surface of the valve body 53, so that the gas balance can be quickly performed. .

During operation, the pressure in the case 25 causes the first valve body 53 to be pressed against and adhere to the valve base 52, so that no compressed gas leakage occurs. Also, it is held so as not to move easily in the rotating direction.

Therefore, the gas balance after the stop can be easily and quickly performed, the restart after the stop can be performed quickly, and the injection of the refrigerant and the like can be performed quickly without waiting for a long time for the gas balance. effective.

Fourth, there is an effect that the electric power for controlling the switching valve section 28 can be reduced. That is, since the stay 88 is made of iron (magnetic piece), the stay 88 does not magnetize except when the valve body 52 is driven, and the stay 88 does not magnetize due to the attractive force between the stay 88 and the magnet member 54. , The switching position can be maintained.

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 56 during operation, so that power consumption can be reduced. .

Fifth, there is an effect that the defrosting of the outdoor heat exchanger can be quickly performed with a simple configuration without stopping the heating operation. That is, in the configuration of the conventional example, when frost forms on the outdoor heat exchanger 64, in order to melt the frost, the heating cycle is temporarily switched to the cooling cycle and the outdoor heat exchanger is heated to a high temperature. High pressure refrigerant must be sent.

However, this causes a problem that the indoor temperature is lowered. In addition, as described above, in the configuration of the related art, since switching between cooling and heating cannot be performed quickly, there is a case where rapid defrost cannot be performed.

Further, in order to eliminate such a drawback,
A method is conceivable in which a switching valve different from the four-way valve is provided, and high-temperature and high-pressure refrigerant from the compressor is directly supplied to the frosted outdoor heat exchanger to perform defrosting.

However, according to this method, since two switching valves are provided, the structure becomes complicated. When this switching valve is provided outside the case 25, the vibration from the compressor is reduced. Must be taken because vibrations occur in the connecting pipe between the switching valve and the valve.

If this separate switching valve is provided in the case 25, it is necessary to increase the size of the case 25, and more wiring is taken out from the case 25, and the wiring structure is increased. Is also complicated.

However, in the present invention, the switching valve section 28
Of a rotary type 5 having first and second two valve bodies 53 and 54
This was housed in case 25 as a side valve. This makes it possible to obtain a compressor that can quickly perform the defrosting operation with a simple configuration without stopping the heating operation.

In the cooling or heating operation, the first
The first and second valve bodies 53, 54 are increased by utilizing the increase in the static friction force due to the close contact between the valve body 53 and the valve base 52.
Can be separately driven by one magnetic force switching unit 56, so that only two wires for supplying power to the electromagnet 90 provided in the magnetic force switching unit 56 are required, and the wiring structure is simplified. effective.

Incidentally, if it is attempted to switch between the three operating states of cooling, heating and defrosting without using the above configuration, at least two or more electromagnets are required.
The wiring and structure are also complicated.

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, the first and second valve bodies 5 rotatably provided as rotary valve valves.
Although the third and 54 are rotatably driven by the magnetic force switching of the magnetic force switching unit 56, the present invention is not limited to this, and another rotary drive mechanism may be used.

For example, a driven gear may be fixed to the outer peripheral surface of the collar 84, or driven teeth may be directly formed and driven by a servomotor having a driving gear.

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

Also, the rotating scroll blade and the non-rotating scroll blade
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. However, 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.

Further, in the above-described embodiment, the first valve body 53 and the second valve body 54 are driven by one magnetic force switching unit 56, but the invention is not limited to this. .
For example, the first valve body 53 is driven by a servomotor,
The second valve body 54 may be driven by a crank mechanism connected to an electromagnetic switching valve.

Even in this case, as described above, the first,
Since a large driving force is not required for the second valve body, there is no need to increase the size of the driving mechanism, and the switching valve itself can be reduced in size.

[0171]

As described above, the present invention provides a high pressure flow
High pressure fluid outside the case inside the closed case where the body is filled
Cut off the low pressure fluid suction pipe to the compressor
A fluid compressor equipped with a rotary five-way switching valve that replaces
In addition, the present invention switches the refrigerant flow path to perform heating, cooling, and removal.
An air conditioner with a five-way valve that performs frost operation.
The compressor has a case in which the compressed high-pressure refrigerant is filled.
The five-way valve is provided in the case and switches the refrigerant flow path.
This is a rotary five-way switching valve having a valve body. Furthermore, on
The rotary five-way switching valve is used for the hermetic case that composes the compressor.
A valve base to be attached, four ports, and a first valve body
And the communication groove, the first and second through holes, and the second valve body.
Have.

According to such a configuration, the piping structure of the air conditioner for performing the defrosting operation during heating, cooling and heating can be simplified, and the assembling of the compressor is facilitated and the simple configuration is achieved. Thus, an air conditioner with less vibration can be obtained.

Further, since the rotary switching valve performs the five-way switching by switching between the first valve body and the second valve body, the defrosting is surely performed while the heating operation is continued. operation is performed, Ke - even if in a state of being incorporated into the scan the compressor to be less the size of. Further, there is an effect that the power for controlling switching between the cooling operation, the heating operation, and the defrosting operation can be reduced.

[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 also a plan view, a side view, and a bottom view showing the first valve body.

FIG. 6 is also a plan view, a side view, and a bottom view showing the first valve body.

FIG. 7 is a plan view and a longitudinal sectional view showing a magnet member.

FIG. 8 is a perspective view showing a combined state of the magnet member and the first and second valve bodies.

FIG. 9 is a top view of the compressor.

FIG. 10 is an operation diagram and a waveform diagram showing a switching operation of the switching valve unit during the heating operation.

FIG. 11 is an operation diagram and a waveform diagram showing a switching operation of the switching valve unit during the defrosting operation.

FIG. 12 is an operation diagram and a waveform diagram showing a switching operation of the switching valve unit during the cooling operation.

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

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

[Explanation of symbols]

25 ... case, 26 ... compressor part, 28 ... switching valve part (rotary five-way switching valve), 52 ... valve base, 53 ... first valve element,
54, a second valve element, 55, a magnet member, 56, a magnetic force switching section (driving means), 60, a first connection port, 61, a low-pressure gas discharge port, 62, a second connection port. 63, indoor heat exchanger, 64, outdoor heat exchanger, 65, bypass pipe port, 66, bypass pipe, 68, concave groove (communication groove), 69, first through hole, 70, Second through hole.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 41/04 F04B 39/00-39/16 F16K 11/074

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 five-way, which is provided in the case and rotates a valve body to switch a discharge pipe for high-pressure fluid out of the case and a suction pipe for low-pressure fluid to the compressor part. possess a switching valve, the rotary type five-way switching valve, Ke - attached to the scan has been Benbe - Graphics and this Benbe - provided to the scan, the Benbe - scan of Ke - scan the outer surface
To the outdoor heat exchanger, indoor heat exchanger,
And three ports connected to the suction side of the compressor and
Port for bypass pipe connected to bypass pipe for defrosting operation
And the three ports of the valve base and the port for the bypass pipe.
-A rotatably mounted inner surface of the case where the port opens
A first valve body and a surface of the first valve body facing the valve base.
The three ports are rotated by the predetermined angle of the valve body.
A communication groove for selectively communicating two of the ports with each other; and another port and bus provided in the first valve body.
The first and the second to connect the port for the ipass tube to the inside of the case.
2 through holes and the first valve body are provided rotatably with respect to the first valve body.
The first valve is rotated by a predetermined angle with respect to
A second valve body for closing the first or second through hole of the body;
A fluid compressor comprising: 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 five-way valve for switching a refrigerant flow path to a heater to perform heating, cooling, and defrosting operations, wherein the compressor includes a case filled with high-pressure refrigerant after compression, the five-way valve, said Ke - provided in the scan, Ri rotary type five-way switching valve der having a valve body for switching the flow path of the refrigerant by rotation, the rotary type five-way switching valve, A valve base attached to the case, and inner and outer surfaces of the case provided on the valve base.
To the outdoor heat exchanger, indoor heat exchanger,
And three ports connected to the suction side of the compressor and
Port for bypass pipe connected to bypass pipe for defrosting operation
And the three ports of the valve base and the port for the bypass pipe.
-A rotatably mounted inner surface of the case where the port opens
A first valve body and a surface of the first valve body facing the valve base.
The three ports are rotated by the predetermined angle of the valve body.
A communication groove for selectively communicating two of the ports with each other; and another port and bus provided in the first valve body.
The first and the second to connect the port for the ipass tube to the inside of the case.
2 through holes and the first valve body are provided rotatably with respect to the first valve body.
The first valve is rotated by a predetermined angle with respect to
A second valve body for closing the first or second through hole of the body;
An air conditioner comprising: 3. The fluid compressor or the air conditioner according to claim 1, wherein the rotary five-way switching valve is provided on the first valve body and the valve base. The first
The first restricts the rotation angle of the valve body with respect to the valve base.
Regulating means provided on the first valve body and the second valve body, and regulating the relative rotation angle of the second valve body within a predetermined range. Drive to rotate, and the first or second
Drive means for performing five-way switching to the discharge gas from inside the case, the indoor and outdoor air conditioners, the suction side of the compressor, and the bypass pipe by operating the above-mentioned regulating means. A fluid compressor or an air conditioner, characterized in that: 4. A fluid compressor or an air conditioner according to claim 3, wherein the drive torque of the drive means is generated between the first valve body and the valve base during the operation of the compressor section. Smaller than the static friction force , and
The fluid compressor or the air conditioner, wherein the fluid compressor or the air conditioner is larger than a static friction force generated between the second valve bodies .