KR100299590B1 - Rotary type hermetic compressor and refrigerating cycle apparatus - Google Patents

Abstract

The present invention provides a rotary hermetic compressor and a refrigeration cycle apparatus which includes a plurality of cylinders and at least one cylinder omits the pressure adduct of the vanes, and improves reliability by miniaturizing and reducing the rigidity of the cylinders. In doing that,

In a rotary hermetic compressor having a high pressure inside the sealed case (1), the compression mechanism (2) is provided in several cylinders (8A, 8B) in which the eccentric rollers (13a, 13b) are freely rotated and accommodated in these cylinders, respectively. And a vane 15a, 15b for dividing the cylinder chambers 14a, 14b into two chambers along the rotational direction of the eccentric roller by applying pressure such that its tip circumference is in contact with the circumferential surface of the eccentric roller. It is characterized in that the high pressure gas in the sealed case is used as the pressure adding means for applying the coil spring 26 as the pressure adding means for applying and for applying pressure to the other vane.

Description

ROTARY TYPE HERMETIC COMPRESSOR AND REFRIGERATING CYCLE APPARATUS}

The present invention relates to, for example, a rotary hermetic compressor constituting a refrigeration cycle of an air conditioner and a refrigeration cycle apparatus constituting a refrigeration cycle with the compressor.

The configuration of a general rotary hermetic compressor is composed of a high-pressure type in a case accommodating an electric motor part and a compressor part connected to the motor part in a sealed case and discharging the gas compressed in the compressor part into a sealed case.

The compression mechanism is freely accommodated in the eccentric roller rotation in the cylinder. In addition, a vane storage groove is provided in the cylinder, and the vane is freely stored therein. Pressure around the tip of the vane is exerted by the pressure addition body so as to contact the peripheral surface of the eccentric roller.

Therefore, the cylinder is divided into two chambers along the rotational direction of the eccentric roller by vanes. The suction part communicates with one room and the discharge part communicates with the other room. A suction pipe is connected to the suction part, and the discharge part is opened in the sealed case.

By the way, a coil spring which is usually an elastic member is used as the pressure adding means for pressurizing the vane. One end of the coil spring is brought into contact with the inner circumferential surface of the sealed case and the other part is brought into contact with the back of the vane to elastically press the vane that is in contact with the free end side. Since the coil spring constantly applies pressure to the vanes, a compression action is started immediately after starting.

In particular, in the case of a multi-cylinder rotary hermetic compressor such as a two-cylinder that has become a mainstream in recent years, the thickness of the cylinder body becomes thin and the rigidity of the cylinder decreases due to the presence of a space accommodating the coil spring. Therefore, it is necessary to make the outer diameter of the cylinder larger to compensate for the decrease in rigidity of the cylinder, but this time the diameter length of the sealed case becomes large.

In addition, it takes a lot of work to process in order to install the horizontal hole for inserting a coil spring into each cylinder. Since it is a two-cylinder, two coil springs must be prepared and the part cost increases. After the insertion process of each coil spring has been completed, it must be kept so that it does not come out again and the work is very cumbersome.

Moreover, the strength with respect to the deformation | transformation of a vane groove falls by providing the horizontal hole for coil spring insertion in each cylinder. Therefore, if each cylinder is fixed to the sealed case by means of arc spot welding or the like, the vane groove is deformed due to the stress generated during welding, and the smooth operation of the vanes is damaged.

On the other hand, HFC (hydrofluorocarbon) mixed refrigerant, which does not contain chlorine atoms, will be adopted as a new refrigerant instead of the conventionally used R22 refrigerant.

As a compressor which compresses this HFC mixed refrigerant and converts it into a high pressure high temperature gas and circulates it in a refrigeration cycle, a rotary hermetic compressor having a high compression performance is suitable.

In addition, the HFC mixed refrigerant has a theoretical cooling capacity larger than that of conventional refrigerants. In particular, by changing to the high-pressure, high-capacity refrigerant R410A, higher efficiency (COP) than the current R22 refrigerant can be expected.

However, the refrigerating capacity and operating pressure of the refrigerant are about 1.5 times larger than those of R22, and in order to make the pressure applied to the sliding parts such as the rotating shaft equal to R22, the thickness of the cylinder is reduced.

However, if the thickness of the cylinder is made thin, of course, the rigidity is lowered. When the rigidity of the cylinder is lowered, not only the precision during machining of the parts is produced but also the deformation during assembly increases, resulting in a decrease in efficiency due to gas leakage.

In addition, since the two-cylinder compressor has a thinner cylinder thickness than the one-cylinder type, when the R410A refrigerant is used, the external diameter length of the cylinder must be increased, resulting in problems.

The present invention is based on the above circumstances, and its object is to presuppose that the cylinder is provided with a plurality of cylinders, and the pressure adding means for the vane of at least one cylinder is omitted, and the number of parts and processing effort can be reduced, and the cylinder It is to provide a rotary hermetic compressor and a refrigeration cycle device constituting a refrigeration cycle having the rotary hermetic compressor to reduce the rigidity of the compact and thinner to improve the reliability.

1 is a longitudinal sectional view of a rotary hermetic compressor showing an embodiment of the present invention;

2 is an exploded perspective view of the upper cylinder and the lower cylinder of the embodiment;

Fig. 3A is a state explanatory diagram of the upper cylinder chamber and the lower cylinder chamber immediately after the start of the embodiment;

3B is a state explanatory diagram of the upper cylinder chamber and the lower cylinder chamber at the time of compression stability;

4 is a longitudinal sectional view of a rotary hermetic compressor showing another embodiment;

5A is a plan view of the upper cylinder of the embodiment;

5B is a plan view of the lower cylinder,

6 is a plan view of the back surface of the vane and the vertical hole in another embodiment of FIG.

It is a top view of the back surface of the vane of another embodiment of FIG.

* Explanation of symbols for main parts of the drawings

1: sealed case 2: compressor section

3: Motor part 8A, 80A: Upper cylinder

8B, 80B: Lower cylinder 13a, 13b: Eccentric roller

15a, 15b: vane 24a, 24b: vertical hole

26: pressure addition body (coil spring) 30: inverter

40: control means (control unit)

In order to satisfy the above object, the rotary hermetic compressor of the first invention accommodates an electric motor unit and a rotary compressor unit connected to the electric motor unit in a sealed case, and discharges the gas compressed by the compressor unit into the sealed case once. In the rotary hermetic compressor for high-pressure inside the case, the compression mechanism is provided in a plurality of cylinders each of which the eccentric rollers are freely rotated eccentrically and vane receiving grooves formed in these cylinders, respectively, with the tip circumference of the eccentric rollers. Pressure is applied by the pressure-adding means so as to contact the circumferential surface of the cylinder, and each vane divides the inside of the cylinder into two chambers along the rotational direction of the eccentric roller, and applies pressure to one or more vanes in the plurality of vanes. The pressure adding means is an elastic member and at the same time pressurizes the other one or more vanes Adding means is a high-pressure gas in the sealed case, the cylinder having the elastic member as the pressure adding means is characterized in that the outside diameter portion that is inserted secured to the inner diameter portion of the closed case.

The rotary hermetic compressor of claim 2, wherein the motor unit and the rotary compressor mechanism connected to the motor unit are accommodated in the sealed case, and the gas compressed by the compressor mechanism is discharged into the sealed case once to make the case high pressure. The compressor section is installed in a plurality of cylinders each of which the eccentric roller is free to rotate eccentrically and the vane receiving groove formed in each of these cylinders, and the pressure is applied by the pressure adding means so that the tip circumference is in contact with the circumferential surface of the eccentric roller. Each vane is divided into two chambers along the rotational direction of the eccentric roller, and the pressure adding means for applying pressure to the one or more vanes in the plurality of vanes is an elastic member and is applied to the other one or more vanes. The pressure adding means for applying pressure is a high pressure gas in a sealed case, and the compressor mechanism is Characterized in that the compression sea pressures higher than the coolant R22.

The rotary hermetic compressor of claim 3, wherein the motor unit and the rotary compressor unit connected to the motor unit are housed in a sealed case, and the gas compressed by the compressor unit is discharged into the sealed case once to make the case high pressure. The compressor section is installed in a plurality of cylinders each of which the eccentric roller is free to rotate eccentrically and the vane receiving groove formed in each of these cylinders, and the pressure is applied by the pressure adding means so that the tip circumference is in contact with the circumferential surface of the eccentric roller. Each vane is divided into two chambers along the rotational direction of the eccentric roller. The pressure adding means for applying pressure to one or more vanes in the plurality of vanes is an elastic member and is applied to the other one or more vanes. The pressure adding means for applying pressure is a high pressure gas in a sealed case, and the motor portion When provided to start the inverter is capable of adjustment before the frequency is characterized in that at a low operating frequency, and the discharge pressure is electrically connected to the control means for controlling the high frequency operation at the point in time has reached a predetermined pressure.

The rotary hermetic compressor of claim 4, wherein the motor unit and the rotary compressor mechanism connected to the motor unit are housed in a sealed case, and the gas compressed at the compressor sphere is discharged into the sealed case once to make the case high pressure. The compressor section is installed in a plurality of cylinders each of which the eccentric roller is free to rotate eccentrically and the vane receiving groove formed in each of these cylinders, and the pressure is applied by the pressure adding means so that the tip circumference is in contact with the circumferential surface of the eccentric roller. Each vane is divided into two chambers along the rotational direction of the eccentric roller. The pressure adding means for applying pressure to one or more vanes in the plurality of vanes is an elastic member and is applied to the other one or more vanes. The pressure adding means for applying pressure is a high pressure gas in a sealed case. As a cylinder using the high pressure gas in the sealed case is characterized in that the outer diameter portion is inserted and fixed to the inner diameter portion of the sealed case.

The rotary hermetic compressor of claim 5, wherein the motor unit and the rotary compressor unit connected to the motor unit are housed in the sealed case, and the gas compressed by the compressor unit is discharged into the sealed case once to make the inside of the case high pressure. The compressor section is installed in a plurality of cylinders each of which the eccentric roller is free to rotate eccentrically and the vane receiving groove formed in each of these cylinders, and the pressure is applied by the pressure adding means so that the tip circumference is in contact with the circumferential surface of the eccentric roller. Each vane is divided into two chambers along the rotational direction of the eccentric roller. The pressure adding means for applying pressure to one or more vanes in the plurality of vanes is an elastic member and is applied to the other one or more vanes. The pressure adding means for applying pressure is a high pressure gas in a sealed case, and the mill center of the vane Vane pressure is applied by the high-pressure gas in the casing is that the back surface is formed in a cross-section substantially arcuate shape, the arcuate shape radius (R _V) is the inner diameter radius of the vane accommodating grooves processing omission hole provided opposed to the vane rear (R _C It is characterized in that formed smaller than (R _V <R _C ).

7. The rotary hermetic compressor of claim 6, wherein the motor unit and the rotary compressor mechanism connected to the motor unit are housed in a sealed case, and the gas compressed at the compressor sphere is discharged into the sealed case once to make the case high pressure. The compressor section is installed in a plurality of cylinders each of which the eccentric roller is free to rotate eccentrically and the vane receiving groove formed in each of these cylinders, and the pressure is applied by the pressure adding means so that the tip circumference is in contact with the circumferential surface of the eccentric roller. Each vane is divided into two chambers along the rotational direction of the eccentric roller. The pressure adding means for applying pressure to one or more vanes in the plurality of vanes is an elastic member and is applied to the other one or more vanes. The pressure adding means for applying pressure is a high pressure gas in a sealed case, Vane pressure is applied by the high-pressure gas in the lungs is the case (which is named after the rounded edges) of the chamfered radius 1㎜ below the edge portion of the back face is characterized in that the machining is carried out.

In order to satisfy the above object, the refrigeration cycle apparatus according to the second aspect of the present invention includes a rotary compressor mechanism connected to an electric motor unit in a sealed case, and discharges the gas compressed in the compressor mechanism into the sealed case and pressurizes the inside of the case. In a refrigeration cycle device comprising a rotary hermetic compressor, a condenser, an expansion mechanism and an evaporator,

Compressor portions of the rotary hermetic compressor are respectively installed in a plurality of cylinders in which the eccentric rollers are freely rotated eccentrically, and vane receiving grooves formed in these cylinders, respectively, and pressure-adding means so that the periphery of the tip contacts the circumferential surface of the eccentric roller. Pressure is added to the vane and each vane divides the inside of the cylinder into two chambers along the rotational direction of the eccentric roller. The pressure adding means for applying pressure to one or more vanes in the plurality of vanes is elastic and at the same time different. At least one vane is characterized in that the pressure portion is configured by the high pressure gas in the sealed case.

According to the invention of claims 1 to 7, by adopting the means for solving the above problems, even if the thickness of the cylinder becomes thin, sufficient reliability can be obtained for applying pressure to the vanes.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of a rotary hermetic compressor is demonstrated based on drawing. This compressor constitutes, for example, a refrigeration cycle of an air conditioner, and the refrigerant used here is an HFC mixed refrigerant. Among the HFC mixed refrigerants, R410A may be preferably used.

This R410A is a mixture of difluoromethane (R32) and pentafluoroethane (R125) at a ratio of 50% (weight ratio).

As shown in FIG. 1, the rotary compressor has a sealed case 1. The compression mechanism part 2 mentioned later is provided in the lower part of this sealed case 1, and the electric motor part 3 is provided in the upper part. The electric motor unit 3 and the compression mechanism unit 2 are connected via the rotary shaft 4.

The motor unit 3 is composed of a stator 5 fixed to the inner surface of the sealed case 1 and a rotor 6 disposed at a predetermined interval inside the stator 5 and into which the rotating shaft 4 is inserted. do.

The electric motor unit 3 is connected to an inverter 30 which varies a driving frequency and is electrically connected to a control unit 40 which is a control means for controlling the inverter 30 through the inverter.

The compression mechanism 2 has two cylinders 8A and 8B disposed up and down through the partition plate 7 at the lower portion of the rotation shaft 4. The cylinders 8A and 8B have a large amount of heat transport per unit volume in that the refrigerant used is a high pressure refrigerant of R410A. Therefore, the thickness is thinner than that of the conventional R22 refrigerant, and the reduction of the exclusion volume is intended.

The main bearing 9 overlaps the upper surface portion of the upper cylinder 8A, and is attached and fixed to the cylinder 8A through the attachment bolt 10 together with the valve cover a. The sub-bearing 11 overlaps with the lower surface part of the lower cylinder 8B, and is attached and fixed to the upper cylinder 8A through the attachment bolt 12 with the valve cover b.

On the other hand, the rotary shaft 4 is rotatably supported by the middle and the lower end of the main bearing 9 and the sub-bearing (11). Moreover, the rotating shaft 4 is integrally provided with two eccentric parts 4a and 4b which penetrate the inside of each cylinder 8A, 8B, and were formed with the phase difference of about 180 degrees. The eccentric portions 4a and 4b are located in the respective cylinders 8A and 8B, and rollers 13a and 13b are fitted to this circumferential surface.

The cylinders 8A and 8B are divided into upper and lower surfaces by the partition plate 7, the main bearing 9 and the sub-bearing 11, and the cylinder chambers 14a and 14b are formed therein. In each of the cylinder chambers 14a and 14b, the eccentric rollers 13a and 13b are accommodated freely in eccentric rotation, and form a crescent moon when viewed in the cylinder chamber itself plane.

In each cylinder 8A, 8B, the vane 15a, 15b which partitions the cylinder chamber 14a, 14b to the high pressure side and the low pressure side is provided. Each vane 15a, 15b is pressurized to the eccentric roller 13a, 13b side by the pressure addition body which is a pressure addition means mentioned later.

The suction pipes 16a and 16b are connected to both cylinders 8A and 8B, respectively, and one end side thereof is joined from the outside of the sealed case 1 and connected to the accumulator 17. On the other hand, the lead-out pipe 18 is connected to the upper end of the sealed case (1). The lead pipe 18 is connected to the accumulator 17 via a condenser 19, an expansion mechanism 20, and an evaporator 21. In this way, for example, a refrigeration cycle of an air conditioner is configured.

Next, each cylinder 8A, 8B and the said pressure addition body are explained in full detail based on FIG.

The upper cylinder 8A and the lower cylinder 8B are provided with openings for forming cylinder chambers 14a and 14b of the same diameter with each other, and at the same time, various attachment holes having the same pitch diameters around the cylinder chambers 14a and 14b. (22 ...) is installed. The mounting hole 22 on the upper cylinder 8A side is a screw hole, and the mounting hole 22 on the lower cylinder 8B side is a passing hole.

In the cylinder chambers 14a and 14b of each of the cylinders 8A and 8B, vane storage grooves 23a and 23b of the same length are provided in the same width toward the outer diameter side, respectively. Since the vane receiving grooves 23a and 23b are formed by, for example, broach processing, the broach teeth are pulled out so that the vertical holes 24a and 24b are provided at the ends of both receiving grooves.

A horizontal hole 25 is provided so as to communicate with the outer circumferential surface of the upper cylinder 8A only and the vertical hole 24a of the vane receiving groove 23a, and the coil spring 26, which is an elastic member as a pressure adder, It is stored. The outer diameter length of this cylinder 8A is approximately equal to the inner diameter length of the sealed case 1.

Again, as shown in Fig. 1, the outer diameter of the upper cylinder 8A is inserted and fixed to the inner diameter of the sealed case 1. In this state, one end of the coil spring 26 is in contact with one wall of the vane 15a housed in the vane receiving groove 23a and the other end is in contact with the inner diameter of the sealed case 1.

The coil spring 26 elastically presses the vanes 15a toward the eccentric roller 13a. The tip circumference of the vane 15a is formed in a semicircular shape when viewed in a plan view, and has no sliding resistance on the circumferential wall of the circular eccentric roller 13a when viewed in plan view, regardless of the rotation angle of the eccentric roller 13a. The vanes 15a are followed and are in line contact.

Accordingly, when the eccentric roller 13a is eccentrically rotated along the inner circumference of the cylinder chamber 14a, the vanes 15a reciprocate along the vane receiving groove 23a.

Again, as shown in Fig. 2, the upper cylinder 8A is provided with a plurality of gas escape holes 27 each formed in a curved shape in plan view with a pitch diameter larger than the pitch diameter of the mounting hole 22. As shown in FIG.

On the other hand, the outer cylinder length of the lower cylinder 8B is formed smaller than the outer diameter length of the upper cylinder 8A. In reality, there is only a minimum external diameter length at which the attaching hole 22 and the vane storage groove 23b are provided, and the external diameter portion is eccentric with respect to the opening forming the cylinder chamber 14b.

A vane 15b of the same length as the vane 15a provided in the upper cylinder 8A is freely received in the vane receiving groove 23b. The pressure adduct for applying pressure to the eccentric roller 13b side of the vane 15b is a high pressure gas compressed in the upper and lower cylinder chambers 8A and 8B and discharged into the sealed case 1.

Then, when the control unit 40 sends an operation signal to the motor unit 3 through the inverter 30, the rotary shaft 4 is driven to rotate, the eccentric rollers 13a, 13b provided in the upper and lower cylinders 8A, 8B. ) Performs eccentric rotation in the cylinder chambers 14a and 14b.

As shown in Fig. 3A, in the upper cylinder 8A, the vane 15a is always elastically pressurized by the coil spring 26 so that the circumference of the tip of the vane 15a is eccentric roller. (13a) It slides on the circumferential wall and divides the inside of the cylinder chamber 14a into 2 parts.

The space capacity of the cylinder chamber 14a becomes maximum in the state where the rolling contact position of the inner peripheral surface of the cylinder chamber 14a of the eccentric roller 13a and the eccentric roller contact position of the vane 15a substantially match. Refrigerant gas, that is, R410A gas, which is a low-pressure HFC mixed refrigerant, is sucked and filled in the upper cylinder chamber 14a through the suction pipe 16a in the accumulator 17.

According to the eccentric rotation of the eccentric roller 13a, the rolling contact position with respect to the inner circumferential surface of the cylinder chamber 14a of the eccentric roller moves and is partitioned from the rolling contact position to the eccentric roller contact position of the vane 15a in the rotational direction. The volume of the cylinder chamber 14a is reduced. That is, the gas guided to the cylinder chamber 14a is gradually compressed first.

As the rotating shaft 4 continues to rotate, the capacity of the cylinder chamber 14a is further reduced, and the gas introduced therein is compressed to rise to a predetermined pressure to open a discharge valve (not shown), which opens a high pressure through the valve cover a. The gas is discharged and filled in the sealed case 1. Then, the high pressure gas filled in the sealed case 1 is discharged from the lead pipe 18 in the upper portion of the sealed case.

In addition, immediately after starting of the electric motor unit 3, the amount of the high pressure gas compressed in the upper cylinder chamber 14a and discharged into the sealed case 1 becomes extremely small, and the inside of the sealed case does not become a completely high pressure state.

Therefore, in the lower cylinder 8B, there is no high-pressure gas for pressurizing the vane 15b, and as shown in Fig. 3A, the eccentric roller 13b rotates in the cylinder chamber 14b. The vane 15b is completely accommodated in the vane receiving groove 23b, and its tip circumference is pressed by the eccentric roller and does not protrude into the cylinder chamber.

In other words, the eccentric roller 13b only revolves in the lower cylinder chamber 14b, and no small compression action is achieved in this cylinder chamber.

When a predetermined time elapses, the amount of the high pressure gas discharged from the upper cylinder chamber 14b increases, and the inside of the sealed case 1 becomes a predetermined high pressure condition. Then, a large back pressure is applied to the vane 15b provided in the lower cylinder 8B, and as shown in FIG. 3B, the vane is pressurized to contact the circumferential wall of the eccentric roller 13b. .

Therefore, the compression operation as described above is also started in the lower cylinder chamber 14b. In the upper cylinder chamber 14a, the compression operation then continues. After this, the compression operation continues in the lower cylinder chamber 14b because the inside of the sealed case 1 maintains high pressure until the operation stops.

As shown in FIG. 1, the high-pressure gas drawn through the induction pipe 18 in the sealed case 1 is led to the condenser 19 to condense and condensed, and adiabatic expansion in the expansion mechanism 20, and heat exchange air in the evaporator 21. It takes the latent heat of evaporation from the air and achieves cooling. After the evaporation, the refrigerant is led to the accumulator 17, and gas and liquid are separated. The refrigerant is then sucked into the compression mechanism part 2 of the compressor in the suction pipes 16a and 16b to circulate the above-described path.

In the lower cylinder chamber 14b, when the compression start time is to be shortened, the control unit 40 controls the inverter 30 to increase the rotational speed of the rotation shaft 4 from the start of operation to shorten the case internal pressure. May be increased to a predetermined pressure.

On the contrary, when it is desired to delay the operation start time, the control unit 40 controls the inverter 30, and it takes time for the case internal pressure to rise to a predetermined pressure by decreasing the rotation speed of the rotation shaft 4 from the start of operation. The rotation speed may be increased after the time that the projection of the vane 15b is completed into the lower cylinder chamber 14b.

The vane 15b on the lower cylinder chamber 14b side protrudes due to a pressure difference between the internal pressure of the sealed case 1 and the pressure of the cylinder chamber 14b, but the lower pressure side of the system until the compression starts in the lower cylinder chamber 14b. Even if the case internal pressure is higher than this, when it becomes 0.1 megapascal (MPa), it is almost equal to the pressure of the coil spring 26 which presses the vane 15a of the upper cylinder chamber 14a and the protrusion of the vane 15b. Following the rotational movement of the eccentric roller 13b is possible.

Usually, a pressure generation is applied to apply pressure to the vane 15b to protrude into the lower cylinder chamber 14b within a few seconds with a commercial power source (50/60 kV) and within 10 seconds with a inverter power source. It is possible.

Thus, even if high pressure gas in the sealed case 1 is used as the pressure adding means for applying pressure to the vane 15b toward the lower cylinder chamber 14b, there is no problem in function.

That is, if the system continues to operate and the system is in a stable condition, the force for applying pressure to the vane 15b due to the internal pressure of the case is several tens of times the force for applying pressure to the coil spring 26 provided in the upper cylinder 8A (elastic force). In spite of the fact that the coil spring is not functionally necessary, it generates a slight increase in workload.

In addition, the compressor of the present invention has a feature of reducing the load on sliding parts such as the rotating shaft 4 since the compressor acts on only one cylinder (here, the upper cylinder 8A) at the time of starting. That is, a device with a large amount of refrigerant charge, such as an air conditioner, sucks a large amount of liquid refrigerant into the cylinder chamber at the moment of start-up according to the use conditions and generates liquid compression. At this time, there is a fear that each sliding part is damaged.

In addition, by adopting the configuration of the present invention, since the load on the sliding parts can be reduced, damage can be prevented. It is also possible to omit the accumulator 17 which is always equipped with this type of rotary compressor.

In all of the lower cylinders 8B using the high-pressure gas in the sealed case 1 as a means for applying pressure to the vanes 15b, the horizontal holes 25 for inserting the coil springs 26 are unnecessary. Even if the thickness of is thin, the rigidity can be improved, and the deformation of the vane receiving groove 23b is minimized.

In addition, it is better to avoid the sudden increase in the operating frequency because the vane 15b is suddenly bounced off because it causes the sound of the eccentric roller 13b and the vane. As a means of avoiding a sudden increase in the internal pressure of the case, the controller 40 controls the inverter 30 to lower the operating frequency of the electric machine 3 at the time of starting and to increase the internal pressure of the case so that the vane 15b protrudes. It is good to delay the speed and increase the operating frequency after that. In addition, a means for relaxing the diaphragm of the expansion valve constituting the expansion mechanism 20 or opening a defrosting valve (not shown) is also effective.

In the above embodiment, the coil spring 26 is provided as a means for applying pressure to the vane 15a in the upper cylinder 8A, and the upper cylinder outer diameter portion is inserted and fixed to the inner diameter of the sealed case 1, Moreover, although the high pressure gas in the sealed case was used as a means to apply pressure to the vane 15b in the lower cylinder 8B, it is not limited to this, You may comprise as described below.

That is, it is set as the rotary hermetic compressor as shown in FIG. First, the compressor described in FIG. 1 differs only from the pressure adding means of the vane 15a in the upper cylinder 80A and the pressure adding means of the vane 15b in the lower cylinder 80B.

In addition, there is a slight difference in the details of the configuration on the drawing, but basically the same parts because they are made of the same parts, and the new description is omitted. In addition, since the structure of electric control and a refrigeration cycle is the same as the former thing, it abbreviate | omits here.

The upper cylinder 80A has a planar shape as shown in Fig. 5A. That is, the cylinder chamber 14a which is a circular opening part, and the cylinder main body 80a concentric with a circular shape are formed.

A relatively large area of the first jaw portion 80b which is almost fan-shaped is formed integrally on a part of the circumferential surface of the cylinder body 80a. The second jaw portion 80c is formed in a substantially rectangular shape at a position substantially 180 ° of the center of the first jaw portion 80b, and is smaller than the first jaw portion.

The outer circumferential surface of the first jaw portion 80b and the outer circumferential surface of the second jaw portion 80c are concentric with the cylinder chamber 14a and the cylinder body 80a, and have an arc having the same radius as the inner diameter of the sealed case 1. To form.

The cylinder main body 80a is provided with a vane storing groove 23a for opening in the cylinder chamber 14a and accommodating the vanes 15a. And the vertical hole 24a which is a missing hole in the vane storing groove 23a process is provided in the boundary part of the cylinder main body 80a and the 1st jaw part 80b.

Moreover, several screw holes 22 for attaching and fixing the main bearing 9 to the upper cylinder 80A through the attachment screw 10 are provided at a predetermined position of the cylinder main body 80a.

The lower cylinder 80B has a planar shape as shown in Fig. 5B. That is, the cylinder chamber 14b which is a circular opening part, and the concentric circular cylinder main body 80a are formed. A jaw portion 80d which has a substantially rectangular shape is protruded to a part of the circumferential surface of the cylinder main body 80a.

The cylinder body 80a is provided with a vane storage groove 23b for opening in the cylinder chamber 14b and accommodating the vanes 15b. The vane storage groove is provided at the boundary between the cylinder body 80a and the jaw portion 80d. (23a) The vertical hole 24b, which is a processing missing hole, is provided.

In addition, a horizontal hole 25 is provided in the middle portion of the longitudinal groove 24b so as to communicate with the vane receiving groove 23b, and a coil spring 26, which is an elastic member as a pressure adding means, is inserted therein. The cross section of the horizontal hole 25 is closed by the cover body 28 shown only in FIG.

In addition, a plurality of through holes for attaching and fixing the lower cylinder 80B, the partition plate 8 and the sub-bearing 11 to the upper cylinder 80A at a predetermined position of the cylinder body 80a through the attachment screw 12. 22 is installed.

As shown in FIG. 4, the outer diameter of the upper cylinder 80A is inserted and fixed to the inner diameter of the sealed case 1. Therefore, although not specifically shown, a space for gas escape is formed between the cylinder body 80a, the first jaw portion 80b, the second jaw portion 80c, and the inner diameter portion of the sealed case 1 described above.

While the eccentric roller 13a is freely accommodated in the cylinder chamber 14a and the vane storage groove 23a contains the vane 15a, the high pressure gas in the sealed case 1 is a means for pressing the vane. There is no storage other than vane because it uses.

The eccentric roller 13b is accommodated freely in the cylinder chamber 14b of the lower cylinder 80B, and the vane 15b is accommodated in the vane accommodating groove 23b. The vane 15b is elastically applied to the circumferential surface of the eccentric roller 13b by the coil spring 26.

In the rotary hermetic compressor configured as described above, immediately after starting the motor unit 3, the amount of the high pressure gas compressed in the lower cylinder chamber 14b and discharged in the sealed case 1 is very small, so that the inside of the sealed case is not completely high pressure. Do not.

Therefore, in the upper cylinder 80A, the eccentric roller 13a rotates in the cylinder chamber 14a without the high pressure gas which pressurizes the vane 15a, but the vane 15a is the vane receiving groove 23a. It is fully receptive and its tip circumference is pressed by a roller so that it does not protrude into the cylinder chamber. The eccentric roller 13a merely revolves, and thus no compression is effected in the cylinder chamber 14a.

When a predetermined time elapses, the amount of the high pressure gas discharged from the lower cylinder chamber 14b increases, and the inside of the sealed case 1 becomes a predetermined high pressure condition. Therefore, a large back pressure is applied to the vane 15a provided in the upper cylinder 80A, and the vane is pressurized to contact the circumferential wall of the eccentric roller 13a.

Therefore, the compression operation as described above is also started in the upper cylinder chamber 14a. In the lower cylinder chamber 14b, the compression operation continues continuously. After this, the compression operation continues in the upper cylinder chamber 14a because the inside of the sealed case 1 maintains a high pressure until the operation stops.

Regardless of the compressor of FIG. 1 and the compressor of FIG. 4, the back surface of the vanes 15a and 15b to which pressure is applied by the high pressure gas in the sealed case 1 may be as shown in FIG. 6 or 7.

Referring to Fig. 6, when the radius of the vertical holes 24a and 24b serving as the vane for the vane storage groove processing is set to R _C , the vertical hole side end surface of the vanes 15a and 15b has a radius R _V. Is formed. The radius R _V of the cross-sectional arc shape of the vanes 15a and 15b is formed smaller than the radius R _C of the vertical hole (R _V < R _C ).

In particular, the vane tip and the eccentric roller circumferential surface, the vane back surface and the longitudinal hole circumference are very short time from the start of the vane pressurized by the internal pressure of the case until the differential pressure between the internal pressure of the case and the cylinder chamber pressure becomes 0.1 MPa. Because of this intermittent contact, intermittent sound may be generated.

By adopting the configuration shown in Fig. 6, the rear surfaces of the vanes 15a and 15b as well as the rear surfaces come into contact with each other, so that the occurrence of intermittent sound is more suppressed. In addition, the vanes and cylinders, which are soft in material, are not damaged or damaged, thereby preventing the vanes and cylinders from sticking together.

Next, referring to FIG. 7, the radius of the vertical holes 24a and 24b may be a predetermined length. However, both edges of the back surface of the vanes 15a and 15b are defined as R portions having a radius of 1 mm or less.

Therefore, since the R surfaces contact each other on the back surfaces of the vanes 15a and 15b, the generation of intermittent sound is more suppressed. In addition, the vane and the cylinder are prevented from sticking to each other without causing defects and bottoms on the materially soft vanes and the cylinder.

Moreover, although the said embodiment demonstrated the 2-cylinder type compressor provided with two cylinder chambers, it is not limited to this, It is applicable to the rotary hermetic compressor of the multi-cylinder more than 2 cylinders.

As described above, according to the invention of claim 1, the high pressure gas is used as the pressure adding means because the elastic member is used as a means for applying pressure to at least one vane and the high pressure gas in a sealed case is used as a means for applying pressure to at least one vane. On the cylinder side, the effect of reducing the number of parts and reducing the processing is exhibited.

According to the invention of claim 2, it is possible to cope with a high-pressure refrigerant such as R410A, among which HFC mixed refrigerant.

According to the invention of claim 3, in the cylinder using the high pressure gas as the pressure adduct, the sound breakdown between the roller and the vane can be obtained.

According to the invention of claim 4, the assembly of the compression mechanism can be facilitated.

According to the inventions of Claims 5 and 6, the contact between the vanes and the cylinders is smooth, and suppression of the occurrence of the intermittent sound can be obtained.

According to the invention of claim 7, in the refrigerating cycle, it is possible to reduce the components of the compressor and the assembly labor.

Claims (7)

A rotary hermetic compressor comprising a motor unit and a rotary compressor mechanism connected to the motor unit in a sealed case, and once the gas compressed by the compressor sphere is discharged into a sealed case to make the case high pressure. Each of the compressor mechanism includes a plurality of cylinders in which the eccentric roller is freely rotated eccentrically, These vanes are provided in the vane receiving grooves respectively formed in these cylinders, and the pressure is applied by means of pressure-adding means so that the periphery of the tip is in contact with the circumferential surface of the eccentric roller. With vanes, In the plurality of vanes, the pressure adding means for applying pressure to at least one vane is an elastic member and the pressure adding means for applying pressure to at least one vane is a high pressure gas in a sealed case. And the outer diameter portion of the cylinder having the elastic member as the pressure adding means is fixed to the inner diameter portion of the sealed case. A rotary hermetic compressor comprising a motor unit and a rotary compressor mechanism connected to the motor unit in a sealed case, and once the gas compressed by the compressor sphere is discharged into a sealed case to make the case high pressure. Each of the compressor mechanism includes a plurality of cylinders in which the eccentric roller is freely rotated eccentrically, These vanes are provided in the vane receiving grooves respectively formed in these cylinders, and the pressure is applied by means of pressure-adding means so that the periphery of the tip is in contact with the circumferential surface of the eccentric roller. With vanes, In the plurality of vanes, the pressure adding means for applying pressure to at least one vane is an elastic member and the pressure adding means for applying pressure to at least one vane is a high pressure gas in a sealed case. The compressor mechanism is a rotary hermetic compressor, characterized in that for compressing a refrigerant with an operating pressure higher than R22. A rotary hermetic compressor comprising a motor unit and a rotary compressor mechanism connected to the motor unit in a sealed case, and once the gas compressed by the compressor sphere is discharged into a sealed case to make the case high pressure. Each of the compressor mechanism includes a plurality of cylinders in which the eccentric roller is freely rotated eccentrically, These vanes are provided in the vane receiving grooves respectively formed in these cylinders, and the pressure is applied by means of pressure-adding means so that the periphery of the tip is in contact with the circumferential surface of the eccentric roller. With vanes, In the plurality of vanes, the pressure adding means for applying pressure to at least one vane is an elastic member and the pressure adding means for applying pressure to at least one vane is a high pressure gas in a sealed case. The motor unit is electrically connected to an inverter capable of adjusting the driving frequency, and a control means for controlling the driving frequency to be low when starting and increasing the operating frequency when the discharge pressure reaches a predetermined pressure. Hermetic compressor. A rotary hermetic compressor comprising a motor unit and a rotary compressor mechanism connected to the motor unit in a sealed case, and once the gas compressed by the compressor sphere is discharged into a sealed case to make the case high pressure. Each of the compressor mechanism includes a plurality of cylinders in which the eccentric roller is freely rotated eccentrically, These vanes are provided in the vane receiving grooves respectively formed in these cylinders, and the pressure is applied by means of pressure-adding means so that the periphery of the tip is in contact with the circumferential surface of the eccentric roller. With vanes, In the plurality of vanes, the pressure adding means for applying pressure to at least one vane is an elastic member and the pressure adding means for applying pressure to at least one vane is a high pressure gas in a sealed case. And the outer diameter portion of the cylinder using the high pressure gas in the sealed case as the pressure adding means is fixed to the inner diameter portion of the sealed case. A rotary hermetic compressor comprising a motor unit and a rotary compressor mechanism connected to the motor unit in a sealed case, and once the gas compressed by the compressor sphere is discharged into a sealed case to make the case high pressure. Each of the compressor mechanism includes a plurality of cylinders in which the eccentric roller is freely rotated eccentrically, These vanes are provided in the vane receiving grooves respectively formed in these cylinders, and the pressure is applied by means of pressure-adding means so that the periphery of the tip is in contact with the circumferential surface of the eccentric roller. With vanes, In the plurality of vanes, the pressure adding means for applying pressure to at least one vane is an elastic member and the pressure adding means for applying pressure to at least one vane is a high pressure gas in a sealed case. Among the vanes, the vanes to which the pressure is applied by the high pressure gas in the sealed case are formed in a circular arc cross section on the back thereof, and the arc radius R _V is the inner radius of the vane receiving groove for processing the vane receiving groove provided to face the back of the vane. R _C) smaller than (R _V <R _C) rotary closed type compressor, characterized in that formed. A rotary hermetic compressor comprising a motor unit and a rotary compressor unit connected to the motor unit in a sealed case, and once the gas compressed by the compressor unit is discharged into a sealed case to make the case high pressure. Each of the compressor mechanism includes a plurality of cylinders in which the eccentric roller is freely rotated eccentrically, These vanes are provided in the vane receiving grooves respectively formed in these cylinders, and the pressure is applied by means of pressure-adding means so that the periphery of the tip is in contact with the circumferential surface of the eccentric roller. With vanes, In the plurality of vanes, the pressure adding means for applying pressure to at least one vane is an elastic member and the pressure adding means for applying pressure to at least one vane is a high pressure gas in a sealed case. The vane to which the pressure is applied by the high pressure gas in the sealed case among the vanes is a chamfering process of a radius of 1mm or less is applied to the edge of the rear surface. A rotary hermetic compressor, a condenser, an expansion mechanism, and an evaporator accommodating an electric motor portion and a rotary compressor mechanism connected to the electric motor portion, and discharging the gas compressed by the compression mechanism portion into a hermetic case once to make a high pressure in the case. In the refrigeration cycle apparatus provided with, Compressor portions of the rotary hermetic compressor are respectively installed in a plurality of cylinders in which the eccentric rollers are freely rotated eccentrically, and vane receiving grooves formed in these cylinders, respectively, and pressure-adding means so that the periphery of the tip contacts the circumferential surface of the eccentric roller. And each vane is divided into two chambers in the cylinder along the direction of rotation of the eccentric roller, The pressure adding means for applying pressure to one or more vanes in the plurality of vanes is an elastic member and at least one vane is configured to be pressurized by high pressure gas in the sealed case.

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