JP2002130133A - Compressor with built-in flow passage changing mechanism and refrigerating cycle device using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eco-friendly compressor using an HFC type refrigerant or an inflammable refrigerant, while enhancing its reliability as to leakage and reducing the rate at which the refrigerant emanates into the atmosphere, by making it possible to make smaller and thinner a flow passage changing mechanism part built into the compressor, for a reduction in number of line joints of the compressor, without necessitating an increase in size of a compressor case 1 and a significant increase of costs. SOLUTION: A drive for driving a selector valve 8 which changes a flow passage has its cylinder driveshaft 13 positioned on an axis different from the axis of the selector valve actuating shaft 12 of the selector valve 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor with a built-in flow switching mechanism used in an air conditioner for cooling and heating, a refrigerator for defrosting by reversing the flow of a refrigerant, and the like. The present invention relates to a refrigeration cycle device using the same.

[0002]

2. Description of the Related Art Conventionally, a vapor compression refrigeration cycle apparatus generally includes a compressor for compressing a refrigerant as a heat transfer working fluid, and a condenser for exchanging heat with the compressed high-temperature and high-pressure refrigerant to liquefy and condense the refrigerant. And a decompression device such as a capillary tube for decompressing the liquefied and condensed high-pressure refrigerant, and an evaporator for exchanging heat with the depressurized refrigerant and evaporating the refrigerant are connected by a pipe to perform a refrigeration cycle. .

In this refrigeration cycle apparatus, a heat pump air conditioner for cooling and heating or a refrigerator for defrosting the evaporator is used by reversing the flow path of the refrigerant and using the condenser and the evaporator in reverse. Preferably uses a switching valve for reversing the flow path, a so-called four-way valve. Generally, the four-way valve is connected to the compressor via a connection pipe, and similarly connected to two heat exchangers (for example, a condenser and an evaporator) via connection pipes.

As a structure of the four-way valve, a direct-acting electromagnetic coil type has conventionally been proposed, but a differential pressure driving type in which the driving electromagnetic coil is reduced in size and the driving power is small is generally preferably used. ing.

[0005]

In the conventional refrigeration cycle apparatus having the above-described four-way valve, it is necessary to attach a four-way valve device in which four pipes are joined near the compressor. It is said that it is necessary to take vibration isolation measures for the refrigeration cycle device because it becomes a vibration source, and the noise and vibration of the refrigeration cycle device are likely to increase, and excessive stress is applied to the piping and it is easy to cause problems such as broken piping. There was a problem.

Further, when four metal pipes are joined to the four-way valve by a technique such as brazing, an additional operation such as water cooling is performed to prevent overheating of the four-way valve. There has been a problem that the manufacturing operation of the apparatus is complicated and costly.

In order to solve the above-mentioned problems, a four-way valve and a compressor are integrally formed, and a flow path switching mechanism including a flow path switching valve for switching a refrigerant flow path in a case of the compressor. Has been proposed.

For example, Japanese Unexamined Utility Model Publication No. Sho 60-124595 discloses a compressor having an integral structure in which a four-way valve is incorporated in a compressor case. According to this compressor, it is possible to manufacture a compressor with a built-in flow path switching structure without any need to develop a new technology. There is a possibility that it may be necessary to review the internal components and the dimensional configuration of the refrigeration cycle device itself, and there has been a problem that it is difficult to realize it.

Japanese Patent Application Laid-Open No. Sho 61-272478 discloses a structure in which a partition plate is provided above a compressor, and an opening communicating with high and low pressures of the compressor is switched by a flow path switching valve that is directly operated by an electromagnetic coil. A hermetic compressor having This hermetic compressor can be manufactured without changing the outer diameter of the cylindrical compressor case.However, since the partition plate is provided, the compressor case has a double structure. , There is a problem that refrigerant leakage easily occurs, and the cost of the compressor case is greatly increased.

Further, in the case of this hermetic compressor, in order to operate the flow path switching valve by direct movement of the coil, it is necessary to operate the flow path switching valve against a large frictional force generated by a differential pressure applied to the flow path switching valve. There is a problem that it is difficult to realize the coil because a large size and a large current are indispensable.

The compressor disclosed in Japanese Patent Application Laid-Open No. 9-264279 or Japanese Patent Application Laid-Open No. 10-2434 uses a rotating flow path switching valve, and magnetically couples a compressor motor with a switching driving force. Since the parts that are used are used, the flow path switching mechanism is small, and there is no need to separately arrange a drive mechanism.Thus, it can be manufactured without a major change in the design of the compressor. There is a problem that it is complicated, it is difficult to secure product reliability, and the cost is high.

The compressor described in Japanese Patent Application Laid-Open No. H11-294336 uses a scroll type compressor, in which a discharge / suction pipe of the compressor is brought close to the compressor, and a switching valve structure integrated with a compressor case. Have. In this case, although the size of the switching mechanism can be expected to be small, it is a structure in which each of the high and low pressures of the refrigerant is taken into the switching mechanism. There is a problem that the installation space for the compressor is increased, and it is difficult to fully utilize the merits of integrating the flow path switching mechanism and the compressor.

The compressor described in Japanese Patent Application Laid-Open No. 2000-65221 has a structure in which a rotating flow path switching valve is driven directly by an electromagnetic coil after a differential pressure is eliminated by a pilot valve. In this compressor, since the frictional force of the sliding portion of the flow path switching valve caused by the differential pressure is reduced, a large electromagnetic coil and a large current are not required for driving the compressor, and the electromagnetic coil can be downsized. It is possible to avoid an increase in the size of the compressor caused by incorporating the switching valve in the case.

However, since the entire switching mechanism is vertically long due to the arrangement of the pilot valve, there is a problem that the compressor case needs to be vertically long. Also, since the electromagnetic coil is housed in the case, it is necessary to install a power supply terminal in the compressor case, and the number of hermetic terminals increases. There was a problem that had to be done.

In recent years, chlorofluorocarbon (CFC) has been used as a refrigerant for the purpose of protecting the global environment.
There is a growing movement to replace HCFCs and hydrochlorofluorocarbons (HCFCs) with hydrofluorocarbons (HFCs). Although it is said that this HFC-based refrigerant does not have a risk of destroying the ozone layer in the atmosphere, it cannot be said that it has no effect on global warming, and the creation of a mechanism that does not release the refrigerant into the atmosphere has been discussed. ing.

In particular, in air conditioners and the like, replacement with R410a, which is an HFC mixed refrigerant having a high operating pressure, is being promoted, and it is necessary to minimize refrigerant leakage due to problems related to pipe joining. Here, in a refrigeration cycle device such as an air conditioner or a refrigerator using a four-way valve, due to an increase in the number of pipe joints when mounting the four-way valve, or due to the complexity of brazing while cooling the four-way valve with water. There is a high possibility that the refrigerant leaks, and it is required to increase the leak reliability.

On the other hand, among the above-mentioned HFC-based refrigerants, an HFC-based refrigerant having a lower global warming potential, for example, R32
Refrigerants, hydrocarbon-based refrigerants such as propane and butane, and mixtures thereof have begun to be studied. However, since these refrigerants are flammable, there is a major problem that it is necessary to take sufficient measures against explosion and fire when the refrigerant leaks. In other words, even for HFC-based refrigerants with a low global warming potential, as with HFC-based refrigerants such as R410a, there is a strong demand for reducing the number of joints and securing leak reliability when installing a four-way valve. Reality.

The present invention has been made in view of the above,
The flow path switching mechanism built into the compressor can be reduced in size and thickness without increasing the size of the compressor case and without significantly increasing costs, and HFC-based refrigerants and flammable refrigerants are used. To reduce the number of compressor pipe joints
It is an object of the present invention to obtain a compressor with a built-in flow path switching mechanism and a refrigeration cycle device using the same, which can improve the reliability against leakage, reduce the refrigerant emission to the atmosphere, and realize a compressor that is environmentally friendly. .

[0019]

In order to achieve the above object, a compressor with a built-in flow path switching mechanism according to the present invention has a flow path including a flow path switching valve for switching a flow path of a refrigerant input / output to / from the compressor. In a compressor with a built-in flow switching mechanism incorporating a switching mechanism, a drive shaft of a driving device for driving the flow switching valve is arranged on a different axis from an operating axis of the flow switching valve. .

According to the present invention, the drive shaft of the drive device for driving the flow path switching valve is disposed on a different axis from the operating axis of the flow path switching valve, and the flow path switching mechanism is mounted on the case of the compressor. Easy to accommodate.

In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, the operating axis of the flow path switching valve is a linear axis, and the driving shaft of the driving device is the above-mentioned flow path switching valve. Characterized by a parallel axis parallel to the operating axis of (1).

According to the present invention, the operating axis of the flow path switching valve is a linear axis, the driving axis of the drive device is a parallel axis parallel to the operating axis of the flow path switching valve, and the operating axis of the flow path switching valve is And the drive shaft of the drive device are made different.

In the compressor with a built-in flow path switching mechanism according to the next invention, in the above-mentioned invention, the driving device includes an electromagnetic coil provided outside the case of the compressor and the compression coil corresponding to an installation position of the electromagnetic coil. Installed inside the machine case,
A differential pressure switching valve that switches a high / low differential pressure of a refrigerant circuit by the electromagnetic coil; and the driving device drives the flow path switching valve using a high / low differential pressure of the refrigerant circuit.

According to the present invention, the drive of the flow path switching valve is
The differential pressure switching valve for switching the differential pressure is used by an electromagnetic coil provided outside the case of the compressor, using the differential pressure of the refrigerant circuit.

In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, the operating core of the differential pressure switching valve is a permanent magnet, and at least one end on which the operating core moves is magnetic. A body is provided, the magnetic core of the electromagnetic coil is changed to move the operating core, and the moved operating core is held by the magnetic material.

According to the present invention, the operating core of the differential pressure switching valve is a permanent magnet, and the operating core is moved by changing the magnetic pole of the electromagnetic coil that drives the driving device, and the operating core moves. At least one magnetic core provided at one end side holds the moved operating core.

In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, the operating core of the differential pressure switching valve is a permanent magnet, and at least one end of the operating core has a notch. Alternatively, a protruding step is provided, the magnetic core of the electromagnetic coil is changed to move the working core, and the moved core is held by the step.

According to the present invention, the operating core of the differential pressure switching valve is a permanent magnet, and the operating core is moved by changing the magnetic pole of an electromagnetic coil for driving a driving device. The moved working core metal is held by a notch-shaped or protruding step portion provided in the portion.

In the compressor with a built-in flow path switching mechanism according to the next invention, the core of the differential pressure switching valve is
A rotor unit driven by a motor around the axis of the core bar by the electromagnetic coil; and a gear mechanism that moves the core bar by rotation of the rotor unit, and the core bar is driven by a motor driven by the electromagnetic coil. The moved core is held by a magnetic body provided on at least one end side where the core moves.

According to the present invention, the rotor is driven by the electromagnetic coil around the axis of the core of the differential pressure switching valve, and the rotation of the rotor rotates the gear mechanism to move the core. The moved core is held by a magnetic material provided at least on one end side where the core moves.

[0031] In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, the core metal of the differential pressure switching valve may be:
A rotor portion driven by a motor around the axis of the core bar by the electromagnetic coil, a gear mechanism for moving the core bar by rotation of the rotor portion, and a notch-shaped or protrusion-shaped step portion; The core metal is moved by a motor driven by a coil, and the moved core metal is held by a holding mechanism of the step portion provided at least on one end side where the core metal moves.

According to the present invention, the rotor is driven by the electromagnetic coil around the axis of the core of the differential pressure switching valve, and the rotation of the rotor rotates the gear mechanism to move the core. The moving core metal is held by a notch-shaped or protruding step-like holding mechanism provided at least on one end side of the moving core metal.

[0033] The compressor with a built-in flow path switching mechanism according to the next invention is the compressor according to the above invention, wherein the flow path is a flow path switching pipe for refrigerant input / output to / from the compressor and the compressor. A flow path switching mechanism having a path switching pipe is collectively arranged on a base including a switching valve base.

According to the present invention, the flow path switching mechanism having the flow path switching valve, the driving device, and the flow path switching pipe is arranged collectively on the base including the switching valve base.

A compressor with a built-in flow switching mechanism according to the next invention is characterized in that, in the above invention, the flow switching mechanism is integrally joined to a case of the compressor.

According to the present invention, the passage switching mechanism and the compressor case are integrally joined.

In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, the case of the compressor is composed of two or more divided cases joined by welding or brazing. The part is intensively arranged in any one of the divided cases, and the divided case in which the flow path switching mechanism is intensively arranged is overlapped with another divided case when joined together. Are joined inside the joining portion of the other split case.

According to the present invention, when the flow path switching mechanism is centrally arranged in one of the two or more divided cases, and when the divided cases are overlapped and joined, the divided case is The split part in which the flow path switching mechanism is centrally arranged is arranged inside the case and joined.

A compressor with a built-in flow path switching mechanism according to the next invention is characterized in that, in the above-mentioned invention, a flow path switching pipe is installed near the center of gravity of the compressor including the suction muffler.

According to the present invention, the flow path switching pipe is provided near the center of gravity of the compressor including the suction muffler.

[0041] In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, the flow path switching valve and / or the switching valve base may have a heat conductivity smaller than that of copper. It is characterized by being formed of a material having

According to the present invention, the flow path switching valve and / or the switching valve base are formed of a material having a thermal conductivity smaller than that of copper.

In the compressor with a built-in flow path switching mechanism according to the next invention, the flow path switching valve and / or the switching valve base are made of any one of stainless steel, ceramics and synthetic resin, or It is characterized by being formed by the material by the combination of.

According to the present invention, the flow path switching valve and / or the switching valve base are formed of one of stainless steel, ceramics, synthetic resin, or a combination thereof.

In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, a gap closed by a differential pressure of a refrigerant circuit is formed in a sliding surface between the flow path switching valve and the switching valve base. It is characterized by having been formed.

According to the present invention, a gap that is closed by the differential pressure of the refrigerant circuit is formed on the sliding surface between the flow path switching valve and the switching valve base.

In the compressor with a built-in flow path switching mechanism according to the next invention, the sliding surface between the flow path switching valve and the switching valve base is slightly inclined with respect to a horizontal plane in the above invention. It is characterized by.

According to the present invention, the sliding surface between the flow path switching valve and the switching valve base is formed to be slightly inclined with respect to the horizontal plane.

The compressor with a built-in passage switching mechanism according to the next invention is the compressor according to the above invention,
A communication hole that is closed by a differential pressure of the refrigerant circuit is provided.

According to the present invention, at the lower part of the flow path switching valve,
A communication hole closed by a differential pressure of the refrigerant circuit is provided.

In the compressor with a built-in flow path switching mechanism according to the next invention, in the above invention, a partition plate is provided near the flow path switching mechanism section in which the inside of the compressor case is on the high pressure side,
A discharge port connected to the flow path switching mechanism is arranged near the center of the compressor.

According to the present invention, the partition plate is provided in the vicinity of the passage switching mechanism where the inside of the compressor case is on the high pressure side, and the discharge port connected to the passage switching mechanism is located near the center of the compressor. It is arranged.

A compressor with a built-in flow path switching mechanism according to the next invention is characterized in that, in the above invention, the motor of the compressor uses a concentrated winding coil.

According to the present invention, the concentrated winding coil is used for the electric motor of the compressor. This facilitates creation of a space in the compressor case that houses the flow path switching mechanism.

A compressor with a built-in flow path switching mechanism according to the next invention is characterized in that cylinders for driving the drive shaft of the drive device are provided at both ends of the drive shaft.

According to the present invention, the drive shafts are driven by the cylinders at both ends in accordance with the drive direction of the drive shaft of the drive device, and the position control of the flow path switching valve is facilitated. In this case, the flow path can be switched also in the operation direction of, the position of the flow path switching valve can be maintained even when the operation is stopped, and the flow path switching valve is switched with a small driving differential pressure.

The refrigeration cycle apparatus according to the next invention is as follows.
It is characterized in that any one of the above-described compressors with a built-in flow path switching mechanism is used.

According to the present invention, one of the above-described compressors with a built-in flow path switching mechanism is used for a refrigeration cycle apparatus.

The refrigeration cycle apparatus according to the next invention is as follows.
In the above invention, the compression mechanism of the compressor with a built-in flow path switching mechanism is a twin rotary type.

According to the present invention, the compression mechanism of the above-described compressor with a built-in flow path switching mechanism is realized by a twin rotary type.

The refrigeration cycle apparatus according to the next invention is as follows:
In the above invention, the compression mechanism of the compressor with a built-in flow path switching mechanism is a single rotary type, and the driving power of the electric motor is torque-controlled.

According to the present invention, a single rotary type compressor is used as the compression mechanism of the compressor with a built-in flow path switching mechanism, the flow path switching mechanism is built in, and the driving power of the electric motor is torque-controlled. I have to.

The refrigeration cycle apparatus according to the next invention is as follows.
In the above invention, a flammable refrigerant and / or a refrigerant mainly containing hydrofluorocarbon is used.

According to the present invention, a flammable refrigerant and / or a refrigerant mainly composed of hydrofluorocarbon is used as the refrigerant of the refrigeration cycle apparatus.

[0065]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a compressor with a built-in flow path switching mechanism and a refrigeration cycle apparatus using the same according to the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 First, a first embodiment of the present invention will be described. FIG. 1 is a longitudinal sectional view illustrating a schematic configuration of a compressor with a built-in flow path switching mechanism according to Embodiment 1 of the present invention. FIG. 2 is a view showing a flow path switching mechanism of the compressor with a built-in flow path switching mechanism shown in FIG.
2A shows a rear view of the flow path switching mechanism, FIG. 2B shows a plan view of the flow path switching mechanism, and FIG. 2C shows a front view of the flow path switching mechanism. 2D shows a right side view of the flow path switching mechanism.

In FIG. 1, the compressor with a built-in flow switching mechanism has a built-in flow switching mechanism in the upper part of a compressor case 1 and has a twin rotary type compression mechanism 4 and a concentrated winding motor 3. The compressor case 1 is a high-pressure case type in which the inside of the compressor case 1 is filled with the discharge gas of the compression mechanism unit 4.

As shown in FIG. 2, this compressor case 1
Is composed of two pieces, a compressor upper case 1a and a compressor lower case 1b, which are formed by joining them by welding or the like. Here, for example, an alkylbenzene-based refrigerator 36 is stored at the bottom of the compressor with a built-in flow path switching mechanism, and R410a which is hydrofluorocarbon is used as a refrigerant.

The passage switching mechanism switches the refrigerant input / output passage by a switching valve base 9 and a switching valve 8 installed below the suction / discharge pipe 10 of the compressor with a built-in passage switching mechanism.
That is, the switching valve 8 is operated left and right on the switching valve operating shaft 12 so that one of the suction and discharge pipes 10 communicating with the low-pressure pipe 10a becomes the suction side of the compressor with a built-in flow path switching mechanism, and the other of the suction and discharge pipes. The pipe 10 communicates with the inside of the compressor case 1 and functions as a discharge side. When the switching valve 8 operates in reverse on the switching valve operating shaft 12, the flow path of the refrigerant to each suction / discharge pipe 10 is reversed, and the other suction / discharge pipe 10 functions as a suction side, and one suction / discharge pipe 10 It will function as the discharge side.

The switching valve 8 is driven by the cylinder 14 via the switching valve frame 16. In this case, the cylinder drive shaft 13 of the cylinder 14 and the operating shaft 1 of the switching valve 8
2 are arranged on different axes. Thereby, the flow path switching mechanism in the compressor with a built-in flow path switching mechanism can be arranged small and thin. Further, the channel switching mechanism can be built in the compressor without increasing the outer diameter and height of the compressor case 1.

The cylinder 14 has a cylinder drive shaft 13
Drive the top left and right. As the driving source of the cylinder 14, the high / low pressure of the refrigeration cycle transmitted from the electromagnetic valve 6 via the cylinder capillary 11b is used. That is,
The periphery of the cylinder 14 is on the same high pressure side as the pressure in the compressor case 1. When the pressure on the high pressure side is transmitted into the cylinder 14, the spring 15 in the cylinder 14 causes
2B, the piston 17 is pushed rightward on the paper surface, and the switching valve 8 is operated rightward through the switching valve frame 16 and fixed. On the other hand, when a low pressure is transmitted into the cylinder 14, the piston 1
7 is pulled back to the left side on the paper surface of FIG. 2B, and the switching valve 8 is operated and fixed to the left side.

The solenoid valve 6 has a structure similar to that of the compressor case 1.
The electromagnetic valve coil 7 for driving the electromagnetic valve 6 is disposed outside the compressor case 1. As a result, the size of the flow path switching mechanism can be further reduced. The inside of the compressor case 1 is a high-temperature and high-pressure refrigerant gas atmosphere.
Since the solenoid valve coil 7 is arranged outside the compressor case 1, there is no need to consider the refrigerant resistance of the solenoid valve coil 7, and an insulating material having a lower heat resistance grade can be used. Therefore, cost reduction of the coil material can be realized.

When the solenoid valve coil 7 is disposed in the compressor case 1, the compressor with the built-in flow path switching mechanism itself must be replaced when a malfunction of the solenoid valve coil 7 occurs alone. In the first embodiment, since the solenoid valve coil 7 is disposed outside the compressor case 1, repair can be performed only by replacing the solenoid valve coil 7, and maintenance when a failure occurs becomes much easier.

The operation of the solenoid valve 6 will now be described with reference to FIG. 3, when a voltage is applied to the solenoid valve coil 7, the core 19 is pulled up to the solenoid valve coil 7 side, and the differential pressure switching valve 21
2 pushes up the solenoid valve coil 7 side, that is, upwards. In this state, the cylinder capillary 11b
Communicates with the high pressure inlet 23, and the cylinder capillary 1
The high pressure side of the refrigeration cycle is transmitted to 1b.

On the other hand, when no voltage is applied to the solenoid valve coil 7, the metal core 19 is pressed down by the metal core spring 20, and the differential pressure switching valve 21 closes the high pressure intake 23. For this reason, the cylinder capillary 11b communicates with the low-pressure capillary 11a, and the low-pressure side is transmitted to the cylinder capillary 11b.

By the operation of the solenoid valve 6, the cylinder 14 is driven by a differential pressure, and the switching valve 8 is operated.
The flow path of the suction / discharge pipe 10 is switched.

By the way, in the solenoid valve 6 shown in FIG. 3, in the flow path switching state in which the pressure in the cylinder 14 becomes high,
It is necessary to always apply a voltage to the solenoid valve coil 7. In general, the flow path switching time such as the defrosting operation due to the reversal of the flow path of the refrigerator is short, and the power consumed by the solenoid valve coil 7 causes almost no problem. In the switching, the flow path is always biased to one side for a certain period (time), so that further reduction in power consumption is demanded.

FIG. 4 is a longitudinal sectional view showing a modification of the solenoid valve 6 capable of reducing such power consumption. The solenoid valve 6 is a magnet type solenoid valve. The operating core 26 is a permanent magnet, and the magnetic pole of the iron core 24 is changed according to the direction of the DC voltage applied to the solenoid valve coil 7. , A suction force or a repulsion force is applied freely. The opposite end of the iron core 24, that is, the fixed end 25 on the differential pressure switching valve 21 side is made of a magnetic material. Thus, even when no voltage is applied to the solenoid valve coil 7, the solenoid valve coil 7 is held at predetermined positions above and below the fixed end 25 by the magnetic force of the operating core 26.

As a result, the flow path switching mechanism is maintained only by supplying the solenoid valve driving power only at the start of operation of the refrigeration cycle apparatus, and the flow path switching is maintained. There is no need to supply, and it is possible to realize a flow path switching mechanism that consumes less energy. The solenoid valve of the working core fixed type shown in FIG. 4 can also be realized by providing a notch or a projecting step shown by the gear type solenoid valve shown in FIG.

FIG. 5 is a longitudinal sectional view showing another modification of the solenoid valve 6 shown in FIG. The solenoid valve 6 is a gear-type solenoid valve. The drive unit is a motor, and the core 29 is linearly driven by a gear 29 to operate the differential pressure switching valve 21. The operation direction of the differential pressure switching valve 21 is controlled by the rotation direction of the rotor 28, and the stepped portion of the metal core is fixedly held by the fixed spring 30, whereby once the differential pressure switching valve 21 is once operated, The flow path direction can be fixed without consuming power. Also, the function of fixing the core metal can be realized in the same manner by using the shaft 27 as a magnetic material and the axially movable end as a magnet.

By the way, as shown in FIG. 2, when the upper compressor case 1a having the flow switching mechanism and the lower compressor case 1b are overlapped and welded together, the flow switching mechanism is provided. The compressor upper case 1b side is overlapped with the inner peripheral side. Such joining can prevent spatters at the time of welding from being scattered to the flow path switching mechanism side, and eliminates a problem caused by foreign matter getting into the sliding surface between the switching valve 8 and the switching valve base 9. Thus, a highly reliable compressor with a built-in flow path switching mechanism can be manufactured.

The installation position of the suction / discharge pipe 10 and the low-pressure pipe 10a with respect to the compressor upper case 1a on which the flow path switching mechanism is mounted is slightly shifted from the center position of the cylindrical compressor upper case 1a in the direction of the suction muffler 2. As shown in FIG. 6, the position is near the center of gravity 33 on the cylindrical surface of the entire compressor with a built-in flow path switching mechanism. By installing the suction / discharge pipe 10 at this installation position, the operation vibration transmitted to the suction / discharge pipe 10 during compressor operation can be reduced and suppressed, and the reliability of the pipe strength can be significantly improved.

The material of the switching valve 8 is PPS which is a synthetic resin.
(Polyphenylene sulfide), and the switching valve base 9 uses SUS304 of austenitic stainless steel. In general, piping materials for refrigeration cycle devices include JI
Although a copper pipe such as S-C1220 is used, a low-temperature suction gas refrigerant is used by using a material having a smaller thermal conductivity than copper in the refrigerant flow path in the flow path switching mechanism. Transfer of heat between the suction and discharge pipes 10 in which the refrigerant and the high-temperature discharge gas refrigerant are disposed close to each other is hindered. The decrease can be suppressed.

In the first embodiment, PPS and SUS304 are used for the channel switching mechanism. However, any material having a lower thermal conductivity than copper may be used. For example, metal materials such as iron, ceramics such as alumina, magnesia, and zirconia, and synthetic resins such as PTFE (polytetrafluoroethylene), PEEK, PBT (polybutylene terephthalate), and LCP can be used. However, when using synthetic resin,
Considering exposure to a high-temperature and high-pressure refrigerant atmosphere, contact with refrigerating machine oil, and application of a sliding load to the switching valve base 9, the type of compressor and the application of the refrigerating cycle device, the refrigerant to be used, refrigerating machine oil, etc. It is necessary to select a material that shows sufficient proof stress according to the requirements.

Further, as shown in FIG. 2D, the switching valve 8
A small gap is provided between the switching valve base 9 and the switching valve base 9, and the sliding surface 9a between the switching valve 8 and the switching valve base 9 is arranged to be slightly inclined with respect to the horizontal plane. Since the inside of the compressor case 1 is on the high-pressure side of the refrigeration cycle device and the inside of the switching valve 8 is on the low-pressure side, the gap is closed by the high-low pressure difference during the operation of the compressor, causing refrigerant leakage from the high-pressure side. Absent. On the other hand, when the compressor is stopped, since there is a small gap, when the refrigerating machine oil discharged together with the refrigerant from the compressor is returned, the refrigerating machine oil does not stay in the switching valve 8 and has good oil return performance. And the startability of the compressor is secured.

In addition to the above-mentioned gap and inclination from the horizontal plane,
A switching valve 8 provided with an oil return hole 32 as shown in FIG. 7 may be used. In FIG. 7, an oil return hole 32 is provided at the bottom at the time of installation of the switching valve 8, and a closing lid 31 which closes with a differential pressure is provided. During operation of the refrigeration cycle apparatus, the closing lid 31 is in close contact with the switching valve 8 main body and closes the oil return hole 32 due to the differential pressure between the high pressure around the switching valve 8 and the internal low pressure. To prevent refrigerant leakage.

When the refrigerating machine oil flowing out of the compressor into the refrigerating circuit stays in the switching valve 8 when the refrigerating cycle device is stopped, the closing lid 31 is opened by the own weight of the refrigerating machine oil, and the refrigerating machine oil passes through the oil return hole 32. Is returned to the compressor, so that good oil return performance and startability of the compressor are ensured.

Further, in order to reduce the amount of oil discharged from the compressor, it is effective to install a partition plate 34 shown in FIG. The high-temperature and high-pressure refrigerant gas discharged from the compression mechanism unit 4 shown in FIG. 1 flows to the upper part of the compressor through a communication hole or an air gap formed in the electric motor 3 with mist-like refrigerating machine oil. Thereafter, the refrigerant is discharged to the refrigeration cycle outside the compressor through the suction / discharge pipe 10 (discharge pipe in this case) which is not closed by the switching valve 8 of the flow path switching mechanism. At this time, the mist-like refrigerating machine oil is dispersed over the entire upper surface of the compressor by the rotating electric motor 3, reaches the discharge pipe together with the refrigerant gas or along the inner wall of the case, and is discharged from the discharge pipe.

In this case, by installing the partition plate 34 shown in FIG. 8, the discharge gas is taken in from the discharge port 35 opened near the center of the compressor case where the oil mist is the thinnest. The outflow of refrigeration oil from the machine can be reduced.

Here, the manufacturing process of the compressor with a built-in flow path switching mechanism according to the first embodiment will be described with reference to the process chart shown in FIG. First, fixed parts such as a cylinder 14, pipes such as a suction / discharge pipe 10 and a low-pressure pipe 10a, electromagnetic valve cases, and capillaries are joined to each other by a brazing method or the like based on the switching valve base 9 (S1). in this case,
In order to integrally join, the individual components are temporarily assembled, a placing brazing is arranged, and brazing in the furnace is performed. Also, because it is a joint where copper and stainless steel are mixed, use a silver brazing material that does not contain zinc, use a small amount of flux,
Joining is performed at 1050 [° C.] in a hydrogen atmosphere.

After the brazing, the internal parts of the electromagnetic valve 6 are assembled, and the electromagnetic valve lid 18 is sealed by joining using a technique such as TIG welding (S2). On the other hand, the switching valve frame 16 and the piston 17 are pre-assembled (S
4), this pre-assembled part, switching valve 8 and detent 1
6a is assembled to the main body of the switching valve base (S3).

The integrated part of the flow path switching mechanism assembled in this manner is joined to the compressor case 1a by using a method such as projection welding (S5). Then, the compressor case 1b on which the compressor body was assembled (S6)
And the other compressor case 1a are joined by a method such as MAG welding (S7). Further, a muffler is joined to the main body (S8), and the compressor with a built-in flow path switching mechanism shown in FIG. 1 is completed.

In such a manufacturing process, the flow path switching mechanism is disposed integrally on the base including the switching valve base 9 and this integrated part is joined to the compressor case 1.
In the current general compressor manufacturing process, only a step of joining the flow path switching mechanism integrated part to one of the compressor cases is added, that is, without significantly changing the current compressor manufacturing process. The compressor with a built-in flow path switching mechanism according to the first embodiment can be manufactured.

Further, as described above, the flow switching mechanism is centrally arranged and integrated with the base including the switching valve base 9, thereby simplifying the manufacturing process such as integral joining using brazing in the furnace. The manufacturing process can be shortened and a low-cost manufacturing process can be realized.

In the first embodiment, the compressor has a twin rotary type compression mechanism 4, and the compressor using the concentrated winding motor incorporates the flow path switching mechanism. Conventionally, the coil end portion is more compact than a generally used distributed winding motor, and the motor can be downsized, so that the entire compressor can be downsized.

On the other hand, even if it is difficult to reduce the size of the compressor case 1 itself due to the influence of the capacity of the muffler,
Since a space for accommodating the flow path switching mechanism is formed at the upper part of the case, when the above-described flow path switching mechanism is incorporated in a compressor using a concentrated winding motor, the compressor case 1 can be realized without changing the dimensions. It is possible to minimize design changes and modifications of manufacturing equipment.

The twin rotary type compressor is
Since the compressor is a low-vibration compressor with little torque fluctuation, the effect of realizing low vibration and low noise of the refrigeration cycle device itself can be expected. On the other hand, if the refrigeration cycle device is equipped with a flow path switching component separately from the compressor, the flow path switching component becomes a vibration source, so even if a low-vibration, low-noise twin rotary compressor is used, the refrigeration cycle device itself is not used. In order to reduce vibration and noise, it is necessary to take measures against vibration of the flow path switching component, and the effect of the twin rotary may not be fully utilized.

Here, as described in the first embodiment, by incorporating the above-described flow path switching mechanism in the twin rotary type compressor, the above-described vibration damping measures are not required, and the twin rotary type compressor is not required. A refrigeration cycle device that can fully utilize the effects of low vibration and low noise of the compressor can be realized.

The above-described effect of low vibration and low noise can be achieved by a single rotary type compressor as well as a twin rotary type compressor as long as the applied power is subjected to torque control. it can.

In the compressor with a built-in flow path switching mechanism described in the first embodiment, R410a which is an HFC refrigerant is used.
However, in the process of assembling the refrigeration cycle device using the compressor with a built-in flow path switching mechanism, it is not necessary to separately connect a four-way valve. Dissipation can be reduced.

Further, even when a flammable refrigerant such as R32 or HC is used as the refrigerant, it is possible to reduce the refrigerant leakage failure due to the connection part for separately connecting the four-way valve. It is possible to realize a refrigeration cycle device with high safety such as being able to suppress fire and explosion.

Embodiment 2 Next, a second embodiment of the present invention will be described. In the first embodiment described above,
A single cylinder 14 is provided, and the flow path is switched by the cylinder 14.
In this embodiment, as shown in FIG. 10, a structure having two cylinders 14 is used, and the two cylinders 14 are used to switch the flow path. As a result, the position of the switching valve 8 can be easily controlled, and the flow path can be switched in any direction by a constant high-low pressure difference.
Will be maintained even when the operation is stopped. In addition, the driving force of the switching valve 8 due to the constant height difference pressure includes:
Since there is no need to consider the spring force of the cylinder spring 15 shown in FIG. 2, there is an effect that the minimum drive differential pressure can be reduced and the sectional area of the cylinder 14 can be set small.

On the other hand, in the structure using one cylinder 14 shown in the first embodiment, the differential pressure when the operation is stopped is zero.
In the state close to the above, the flow path is always determined in a certain direction by the cylinder spring 15 shown in FIG. 2, so that it is necessary to hold the switching valve 8 at the left position on the paper of FIG. In such a case, for example, the delay time until a certain differential pressure is generated increases, but in the second embodiment, the delay time can be reduced.

Here, the characteristics of the flow path switching mechanism can be conveniently selected according to the purpose of the refrigeration cycle device to be used.
Since the operation of reversing the flow path is performed in a constant cycle during the operation of the apparatus, there is no problem even with the characteristics of the flow path switching mechanism in the first embodiment, so that it is possible to manufacture at lower cost. In some cases, the compressor with a built-in flow path switching mechanism described in the first embodiment is more appropriate.

On the other hand, in an air conditioner for cooling and heating,
Since the flow path of the refrigeration cycle apparatus is fixed during a certain period in summer and winter, the compressor with a flow path switching mechanism described in the second embodiment is more preferable. It should be noted that the compressor with a built-in flow path switching mechanism described in the first or second embodiment can be conveniently selected according to the manufacturing cost, the control method of the apparatus, and the like.

It should be noted that the present invention is not limited to the compressor with a built-in flow path switching mechanism and the refrigeration cycle apparatus using the same as those described in the first and second embodiments. The compressor can be variously modified and implemented without departing from the gist of the compressor.

[0107]

As described above, according to the present invention, the drive shaft of the drive device for driving the flow path switching valve is arranged on a different axis from the operating axis of the flow path switching valve, and the flow path switching is performed. Since the mechanism can be easily accommodated in the case of the compressor, the size and thickness of the compressor can be reduced, and the cost can be significantly reduced.

According to the present invention, the operating axis of the flow path switching valve is a linear axis, and the driving axis of the driving device is a parallel axis parallel to the operating axis of the flow path switching valve. Since the shaft and the drive shaft of the drive unit are made different, the flow path can be switched by a simple configuration and operation, and a compressor with a built-in flow path switching mechanism is realized which has a small number of parts and realizes low cost. It has the effect of being able to do so.

According to the next invention, the drive of the flow path switching valve is performed by using the differential pressure of the refrigerant circuit, and the differential pressure switching valve for switching the differential pressure is provided by the electromagnetic coil provided outside the case of the compressor. Since the driving is performed, the configuration of the driving device for driving the flow path switching valve is simplified, and the flow path switching mechanism built in the case of the compressor can be further reduced in size. This has the effect that cost reduction and high reliability of the electromagnetic coil for driving the drive device can be ensured.

According to the next invention, the operating core of the differential pressure switching valve is a permanent magnet, and the operating core is moved by changing the magnetic pole of the electromagnetic coil that drives the driving device. Since the moved operating core is held by the magnetic material provided at least on one end side,
There is no need to supply power for holding the position of the flow path switching valve, and an effect is achieved that a compressor with a built-in flow path switching mechanism that consumes less energy can be realized.

According to the next invention, the operating core of the differential pressure switching valve is a permanent magnet, and the operating core is moved by changing the magnetic pole of an electromagnetic coil that drives a driving device. Since the moved operating metal bar is held by the notch-shaped or protruding step portion provided at one end, power supply for holding the position of the flow path switching valve is not required, and energy consumption is reduced. This has the effect of realizing a compressor with a built-in flow path switching mechanism having a small number of components.

According to the next invention, the rotor is driven by the electromagnetic coil around the axis of the core of the differential pressure switching valve, and the rotation of the rotor rotates the gear mechanism to move the core. Since the moved core is held by the magnetic material provided on at least one end side where the core moves, power supply for holding the position of the flow path switching valve is unnecessary, and energy consumption is reduced. There is an effect that a compressor with a built-in flow path switching mechanism can be realized.

According to the next invention, the rotor is driven by the electromagnetic coil around the axis of the core of the differential pressure switching valve, and the rotation of the rotor rotates the gear mechanism to move the core. The moving core metal is held by a notch-shaped or protruding stepped portion holding mechanism provided on at least one end side of the moving core metal, so that the position of the flow path switching valve is held. This eliminates the need for power supply, thereby providing an effect that a compressor with a built-in flow path switching mechanism that consumes less energy can be realized.

According to the next invention, the flow path switching mechanism having the flow path switching valve, the driving device, and the flow path switching pipe is arranged collectively on the base including the switching valve base.
There is an effect that the flow path switching mechanism can be manufactured easily and at low cost.

According to the next invention, the passage switching mechanism and the case of the compressor are integrally joined.
The flow path switching mechanism and the compressor case can be integrally joined without making a significant change in the compressor manufacturing process, so that a compressor with a built-in flow path switching mechanism can be manufactured at low cost. .

According to the next invention, the flow path switching mechanism is concentratedly arranged on any one of the two divided cases, and when the divided cases are overlapped and joined, this divided case is formed. At the joint part of the case, the split case where the flow path switching mechanism is centrally arranged is arranged inside the case and joined, so that when joining the split cases, foreign matter such as welding spatter flows. Prevents splattering to the road switching mechanism side, and can securely join the split cases.
There is an effect that the reliability can be improved.

According to the next invention, the flow path switching pipe is provided near the center of gravity of the compressor including the suction muffler, so that the pipe stress generated due to the operation vibration of the compressor is reduced. Therefore, there is an effect that reliability of piping strength can be remarkably improved.

According to the next invention, the flow path switching valve and / or
Alternatively, since the switching valve base is made of a material having a thermal conductivity smaller than that of copper, the efficiency of the entire refrigeration cycle device due to the flow path switching mechanism is significantly reduced. It has the effect that it can be done.

According to the next invention, the flow path switching valve and / or
Alternatively, the switching valve base is made of stainless steel, ceramics, synthetic resin, or any combination of these materials,
This has the effect of reducing the thermal conductivity and further reducing the reduction in efficiency of the entire refrigeration cycle device caused by the flow path switching mechanism.

According to the next invention, a gap closed by the differential pressure of the refrigerant circuit is formed on the sliding surface between the flow path switching valve and the switching valve base. The effect is that the refrigerating machine oil can be returned.

According to the next invention, the sliding surface between the flow path switching valve and the switching valve base is formed so as to be slightly inclined with respect to the horizontal plane. Due to the weight of the machine oil, there is an effect that the refrigerating machine oil can be easily returned into the compressor from the gap between the flow path switching valve and the switching valve base.

According to the next invention, since the communication hole closed by the differential pressure of the refrigerant circuit is provided in the lower part of the flow path switching valve, refrigeration oil remains in the flow path switching valve. Is prevented from occurring.

According to the next invention, a partition plate is provided in the vicinity of the flow path switching mechanism where the inside of the compressor case is on the high pressure side, and the discharge port connected to the flow path switching mechanism is located near the center of the compressor. , The effect that the amount of oil rising from the compressor can be reduced can be achieved.

According to the next invention, the electric motor of the compressor includes:
Using concentrated winding coils. Since the space for housing the flow path switching mechanism in the case of the compressor is easily made, it is possible to avoid an increase in the size of the case of the compressor.

According to the present invention, the drive shafts are driven by the cylinders at both ends according to the drive direction of the drive shaft of the drive device, and the position control of the flow path switching valve is facilitated. The flow path can be switched also in the direction of operation of the flow path, the position of the flow path switching valve can be maintained even when the operation is stopped, and the flow path switching valve is switched with a small driving pressure difference. Switching control can be performed at high speed, with high accuracy, and easily, the cross-sectional area of the cylinder can be reduced, and the size and thickness of the flow path switching mechanism can be further promoted. .

According to the next invention, any one of the above-described compressors with a built-in flow path switching mechanism is used in a refrigeration cycle apparatus. Thus, pipe vibration and noise can be reduced, the strength can be further increased, and a highly reliable and low-cost refrigeration cycle device can be realized.

According to the next invention, the compression mechanism of the above-described compressor with a built-in flow path switching mechanism is realized by a twin rotary type. This has the effect of further reducing the vibration and noise of the rotary.

According to the next invention, a single rotary type compressor is used as the compression mechanism of the compressor with a built-in flow path switching mechanism, and the flow path switching mechanism is built in to control the driving power of the electric motor by torque. As a result, there is an effect that a refrigeration cycle apparatus with low vibration and low noise can be realized at lower cost.

According to the next invention, a flammable refrigerant and / or a refrigerant mainly composed of hydrofluorocarbon is used as the refrigerant of the refrigeration cycle apparatus. It is possible to improve the reliability against explosions and fires caused by the leakage of flammable refrigerant, or to reduce the emission of HFC refrigerant into the atmosphere, thereby realizing a refrigeration cycle device that is friendly to the global environment. Play.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a schematic configuration of a compressor with a built-in flow path switching mechanism according to a first embodiment of the present invention.

FIG. 2 is a view showing a flow path switching mechanism of the compressor with a built-in flow path switching mechanism shown in FIG. 1;

FIG. 3 is a longitudinal sectional view showing a configuration near a solenoid valve of a flow path switching mechanism shown in FIG. 1;

FIG. 4 is a longitudinal sectional view showing a configuration of another electromagnetic valve of the flow path switching mechanism shown in FIG.

FIG. 5 is a longitudinal sectional view showing a configuration of another solenoid valve of the flow path switching mechanism shown in FIG.

FIG. 6 is a view showing an arrangement position of the suction and discharge pipe shown in FIG. 1;

FIG. 7 is a view showing a modification of the switching valve.

FIG. 8 is a view showing a configuration of a partition plate.

FIG. 9 is an assembly process diagram of the compressor with a built-in flow path switching mechanism shown in FIG. 1;

FIG. 10 is a diagram showing a configuration near a flow path switching mechanism of a compressor with a built-in flow path switching mechanism according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Compressor case, 1a compressor upper case, 1b compressor lower case, 2 muffler, 3 electric motor, 4 compression mechanism, 5 hermetic terminal, 6 solenoid valve, 7 solenoid valve coil, 8 switching valve, 9 switching valve stand , 9a sliding surface, 1
0 Suction and discharge pipe, 10a low pressure pipe, 11a low pressure capillary, 11b cylinder capillary, 12 switching valve operating axis, 1
3 cylinder drive shaft, 14 cylinders, 15 cylinder springs, 16 switching valve frame, 16a non-rotating, 17
Piston, 18 solenoid valve lid, 19 cored bar, 20 cored bar spring, 21 differential pressure switching valve, 22 differential pressure switching valve spring, 23
High pressure inlet, 24 iron core, 25 fixed end of magnetic material, 2
6 working core, 27 shaft, 28 rotor, 29 gear, 30 fixed spring, 31 closing lid, 32 oil return hole, 3
3 Compressor center of gravity, 34 Partition plate, 35 Discharge port, 36
Refrigeration oil.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Taro Kato 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) in Mitsubishi Electric Corporation 3H003 AA05 AB04 AC03 AD03 CD00 CD06 CF04 3H029 AA04 AA09 AA13 AB03 BB16 BB25 BB32 CC02 CC07 CC09 CC13 CC23 CC27

Claims (23)

[Claims] 1. A drive for driving a flow path switching valve in a flow path switching mechanism built-in compressor including a flow path switching mechanism section including a flow path switching valve for switching a flow path of a refrigerant input to and output from a compressor. A compressor with a built-in flow switching mechanism, wherein a drive shaft of the device is arranged on a shaft different from an operating shaft of the flow switching valve. 2. An operation axis of the flow path switching valve is a linear axis, and a driving axis of the driving device is a parallel axis parallel to an operation axis of the flow path switching valve. 2. The compressor with a built-in channel switching mechanism according to 1. 3. The drive device is provided with: an electromagnetic coil provided outside the case of the compressor; and a drive circuit provided inside the case of the compressor corresponding to an installation position of the electromagnetic coil. 3. A flow path according to claim 1, further comprising: a differential pressure switching valve for switching pressure, wherein the driving device drives the flow path switching valve using a high / low pressure difference of the refrigerant circuit. Switching mechanism built-in compressor. 4. The operating core of the differential pressure switching valve is a permanent magnet, a magnetic body is provided on at least one end side where the operating core moves, and the operating core is changed by changing a magnetic pole of the electromagnetic coil. 4. The compressor with a built-in flow path switching mechanism according to claim 3, wherein the movable core metal is held by the magnetic material. 5. The operating core of the differential pressure switching valve is a permanent magnet, and a cut-out or protruding step is provided on at least one end of the operating core to change the magnetic pole of the electromagnetic coil. 4. The compressor with a built-in flow path switching mechanism according to claim 3, wherein the operating core metal is moved by the step, and the moved operating core metal is held by the step portion. 6. A core metal of the differential pressure switching valve, a rotor portion driven by a motor around the axis of the core metal by the electromagnetic coil, a gear mechanism for moving the core metal by rotation of the rotor portion, The method according to claim 3, further comprising: moving the core metal by driving a motor with the electromagnetic coil, and holding the moved core metal by a magnetic body provided on at least one end side where the core metal moves. Compressor with built-in flow switching mechanism. 7. A core of the differential pressure switching valve, a rotor portion driven by a motor around the axis of the core by the electromagnetic coil, a gear mechanism for moving the core by rotation of the rotor, A notch-shaped or protruding step portion, and the core bar is moved by motor driving by the electromagnetic coil, and the movement is performed by a holding mechanism of the step portion provided at least at one end side where the core bar moves. The compressor with a built-in flow path switching mechanism according to claim 3, wherein the compressed core is held. 8. A flow path switching mechanism having a flow path switching pipe which is a pipe for switching the flow path of the refrigerant input / output to / from the compressor and the driving device, and a switching valve base. The compressor with a built-in flow path switching mechanism according to any one of claims 1 to 7, wherein the compressor is arranged on a base including the flow path switching mechanism. 9. The compressor with a built-in flow switching mechanism according to claim 8, wherein said flow switching mechanism is integrally joined to a case of the compressor. 10. The compressor case is composed of two or more divided cases joined by welding or brazing, and the flow path switching mechanism is centrally arranged in any one of the divided cases. The split case in which the flow path switching mechanism is centrally arranged is configured such that when the split case is overlapped and joined with another split case, the joint of the split case is joined inside the joint of the other split case. The compressor with a built-in flow path switching mechanism according to claim 1. 11. The compressor with a built-in flow switching mechanism according to claim 1, wherein a flow switching pipe is provided near a center of gravity of the compressor including the suction muffler. 12. The method according to claim 1, wherein the flow path switching valve and / or the switching valve base are formed of a material having a thermal conductivity smaller than that of copper. The compressor with a built-in flow path switching mechanism according to any one of the above. 13. The flow path switching valve and / or the switching valve base is formed of one of stainless steel, ceramics, synthetic resin, or a combination thereof. 13. The compressor with a built-in flow path switching mechanism according to any one of 12. 14. The sliding surface between the flow path switching valve and the switching valve base, wherein a gap closed by a differential pressure of a refrigerant circuit is formed. The compressor with a built-in flow path switching mechanism according to the above. 15. The compressor with a built-in flow path switching mechanism according to claim 14, wherein a sliding surface between the flow path switching valve and the switching valve base is formed slightly inclined with respect to a horizontal plane. . 16. The flow path switching mechanism according to claim 1, wherein a communication hole closed by a height difference pressure of the refrigerant circuit is provided below the flow path switching valve. Built-in compressor. 17. A partition plate is provided in the vicinity of the flow path switching mechanism section in which the inside of the compressor has a high pressure side, and a discharge port connected to the flow path switching mechanism section is disposed near the center of the compressor. The compressor with a built-in flow path switching mechanism according to any one of claims 1 to 16, wherein: 18. The compressor with a built-in flow path switching mechanism according to claim 1, wherein the motor of the compressor uses a concentrated winding coil. 19. The compressor with a built-in flow path switching mechanism according to claim 1, wherein cylinders for driving a drive shaft of the drive device are provided at both ends of the drive shaft. . 20. A refrigeration cycle apparatus using the compressor with a built-in flow path switching mechanism according to any one of claims 1 to 19. 21. The compressor according to claim 1, wherein a compression mechanism of the compressor with a built-in flow path switching mechanism is a twin rotary type. Refrigeration cycle equipment used. 22. The compressor according to claim 1, wherein the compression mechanism of the compressor with a built-in flow path switching mechanism is of a single rotary type, and the driving power of the electric motor is torque-controlled.
A refrigeration cycle apparatus using the compressor with a built-in flow path switching mechanism according to any one of claims 9 to 10. 23. A refrigeration cycle using a compressor with a built-in flow path switching mechanism according to any one of claims 20 to 22, wherein a flammable refrigerant and / or a refrigerant mainly containing hydrofluorocarbon is used. apparatus.