JPH0979161A - Rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate welding installation of suction pipes, and enhance pressure-resistance strength of an installing area by arranging a suction port of a cylinder by having a prescribed port extending angle from a suction port of the other cylinder, and installing the suction pipes juxtaposed in a sealed case so as to deviate by a port extending angle of the suction port. SOLUTION: A port extending angle of a suction port 41 of a first cylinder 13 is arranged by having a prescribed angle from the central axis passing through a blade 45, and a first suction pipe 38 at this time is extended from the suction port 41, and a sealed case 1 is installed in a position 55. A port extending angle of a suction port 41 of a second cylinder 15 is arranged by having a prescribed angle from the central axis passing through the blade 45, and is arranged so as to separate by a prescribed angle from a port extending angle of the suction port 41 of the first cylinder 13. A second suction pipe 39 at this time is extended from the suction port 41, and the sealed case 1 is installed in a position 57 deviated by α from a conventional piping installing position (a).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor using a refrigerant which is environmentally friendly.

[0002]

2. Description of the Related Art In general, a rotary compressor is known as a compressor used for an air conditioner, a refrigerator or the like. The outline of the rotary compressor includes a cylinder and a roller provided in the cylinder and eccentrically rotated by an eccentric amount of an eccentric shaft portion. The twin type partition two cylinders by a partition plate.

A single refrigerant such as R22 is generally used as the refrigerant.

[0004]

The single refrigerant currently used is an HCFC-based refrigerant containing chlorine, which is said to destroy the ozone layer. Therefore, a preparation period is provided because it adversely affects the global environment. In the future, it will be totally prohibited.

Therefore, H that does not contain chlorine is used as an alternative refrigerant.
In addition to FC-based refrigerants, R32, R125, 134a, etc., R
Mixed refrigerants such as 32/125 are considered promising. At the same time, the development of equipment using mixed refrigerants has become an issue. In particular, a mixed refrigerant such as R32 / 125 has a higher vapor density, a higher pressure, and a larger capacity per unit volume than a conventional single refrigerant such as R22, so that the performance is improved. Then, it is necessary to find the optimum dimension of the compression chamber, for example, by reducing the excluded volume of the compression chamber.

As a problem at this time, for example, if the height of the cylinder is made low (or thin) and the excluded volume is made small,
It becomes difficult to obtain the optimum suction port diameter. Also, in the case of the twin type, since the cylinders are thin, the shapes of the cylinders are close to each other, and the suction ports of each cylinder and each suction pipe connected to each other should be mounted close to the sealed case. become.

For this reason, a welding machine is not inserted between the suction pipes that are close to each other, which makes welding work difficult. Moreover, the residual amount from the mounting hole to the mounting hole of the suction pipe mounted in the closed case becomes small, and there is a problem in terms of pressure resistance.

Therefore, the present invention provides a rotary compressor in which welding work for mounting the suction pipe is facilitated, pressure resistance of the mounting region of the suction pipe is improved, and an optimum suction port area is obtained. It is intended to be provided.

[0009]

In order to achieve the above object, the present invention firstly provides a plurality of cylinders arranged in parallel in a hermetically sealed case, and eccentric rotation in each cylinder.
A rotary compressor including a compression mechanism section having a roller for discharging a working gas taken in from a suction port from a discharge port, and a plurality of suction pipes extending from the suction port of each cylinder and arranged in parallel in a sealed case, The suction port of one of the cylinders is arranged with a predetermined port extension angle from the suction port of the other cylinder, and the mounting position of one suction pipe juxtaposed in the sealed case is set to the suction port of the suction port. Install it by displacing the port extension angle.

Secondly, one of the cylinders is rotated by a predetermined angle so that the suction port of the cylinder is arranged with a predetermined port extension angle from the suction port of the other cylinder, and the sealed case is also provided. The installation position of one of the suction pipes arranged side by side is deviated by the port extension angle of the suction port.

Thirdly, the suction port connected to the suction port of one of the cylinders arranged in parallel is bent into a crank shape and attached to the closed case.

Fourthly, the suction port of the cylinder is formed in an ellipse which is long in the radial direction of the cylinder, the connecting portion of the suction pipe is formed in an ellipse, and the suction pipe is shaped so as to fit within the ellipse of the suction port. Install in a closed case.

According to such a rotary compressor, since the suction pipe to be mounted on the closed case and the pipe position of the suction pipe can be largely separated from each other, the welding work by the welding machine is facilitated and the suction pipe on the closed case is mounted. The pressure resistance of the region is improved.

Further, since the port diameter of the suction port is an ellipse which is long in the radial direction of the cylinder, the optimum suction port area is secured and the suction pipe of the suction port is not deteriorated.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a sealed case of a twin type rotary compressor 3. An electric motor unit 5 and a compression mechanism unit 7 are provided in the closed case 1, and the electric motor unit 5 includes a stator 9 and a rotor 11.

The compression mechanism section 7 includes a first cylinder 13 and a second cylinder 13.
Cylinder 15 and both cylinders 1
The partitions 3 and 15 are partitioned by a partition plate 17 and are independent of each other.

The rotor 11 constituting the electric motor section 5 is fixed to a shaft 19, and the shaft 19 is rotatably supported at both ends by a main bearing 21 and a sub bearing 23. The shaft 19 has eccentric shaft portions 25, 2 which are 180 degrees out of phase with each other in portions corresponding to the first cylinder 13 and the second cylinder 15.
7 are provided. The eccentric shaft portions 25, 27 have the first,
The first roller 31 and the second roller 33 arranged in the second cylinders 13 and 15 are fitted to each other, and each roller 31,
The rotation of the eccentric shaft portions 25 and 27 causes eccentric rotation of the shaft 33, which is 180 degrees out of phase.

Main bearing 21 and sub bearing 2
3, discharge ports 37, 37 having communication openings with the discharge pipe 35 facing the closed cylinder 1 are provided, and the first and second discharge ports 37, 37 are also provided.
The cylinders 13 and 15 of the first and second suction pipes 38,
There are provided suction ports 41, 41 which are connected to and communicate with 39, and a blade 45 which is in constant contact with the outer peripheral surfaces of the rollers 31, 33 by a biasing means 43 such as a back pressure or a spring. The blades 45 form the compression chambers 47, 47.

On-off valves 49, 4 are attached to the discharge ports 37, 37.
9, the discharge port 37 on the side of the first cylinder 13 is surrounded by the first muffler chamber 51, and communicates with the inside of the closed cylinder 1. The discharge port 37 on the second cylinder 15 side is surrounded by the second muffler chamber 55 and communicates with the inside of the closed cylinder 1.

The first and second suction pipes 38 and 39 are provided on the peripheral wall of the closed case 1 as shown in FIG.
The distance d between them is set larger than the distance d1 at the conventional pipe mounting position a.

That is, as shown in FIGS. 3 and 4, the port extension angle θ1 of the suction port 41 of the first cylinder 13 is arranged at a predetermined angle from the central axis line X passing through the blade 45. The first suction pipe 38 is extended from the suction port 41, and in FIG. 2, 55 is the mounting position (mounting hole) of the closed case 1.

Further, the suction port 4 of the second cylinder 15
The first port extension angle θ2 is arranged at a predetermined angle from the central axis line X passing through the blade 45, and is arranged at a predetermined angle θ3 from the port extension angle θ1 of the suction port 41 of the first cylinder 13. There is. At this time, the second suction pipe 39 is extended from the suction port 41 and is indicated by 57 in FIG.
Is the mounting position (mounting hole) of the closed case 1. The mounting position 57 is mounted offset from the conventional piping mounting position a by α, and α is the port extension angle θ3.

One of the first and second suction pipes 38, 39 is
The suction cup 59 is connected and communicates with the suction cup 59, and the other is connected to the suction ports 4 of the first and second cylinders 13 and 15.
1 and 41 are connected and communicated.

First and second connection with the suction cup 59
As shown in FIGS. 5 and 6, the suction pipes 38, 39 have a length h, which corresponds to each pipe mounting position 55, 57 of the closed case 1.
It is set to h1 so that it can be attached easily and accurately.

The suction ports 41, 41 connected to the first and second suction pipes 38, 39 are formed in ellipses which are long in the radial direction with respect to the thin cylinders 13, 15 as shown in FIG. As a result, the suction port 41 secures a necessary and sufficient suction amount. The connecting portion 61 of the first and second suction pipes 38, 39 connected to the suction port 41 formed in an ellipse is formed in an ellipse, and the diameter of the main body of the suction pipes 38, 39 is formed in an ellipse. It is set to have a cylindrical shape that fits within the port diameter of 41. Although not shown, the connecting portion 61 may have the same elliptical shape.

Connection part 6 of first and second suction pipes 38, 39
The means for making 1 an ellipse can be easily made an ellipse by using the pipe expanding device 63.

That is, as shown in FIG. 8, the suction pipes 38, 39
Insert the expansion coil 65 up to the connection part 61 that is the tip of
By passing a current through the extension coil 67 through the extension cord 67, a magnetic field is created across the connecting portion 61 as shown by the dotted line, and the diameter is expanded by the force in the arrow direction from the extension coil 65 into the cylinders 13, 15. It The connecting portion 61 between the suction port 41 and the suction pipes 38, 39 is made of the sealing material 6 as shown in FIG.
The interposition of 9 further secures the seal of the connection area.

In this case, as shown in FIG. 10, by forming the uneven surface 71 on the inner circumference of the suction port 41, the uneven surface 71 is formed.
It is also possible to adopt a shape in which a reliable connection state of the connection portion 61 that follows the above is ensured.

As a modified example, the suction pipe 3 shown in FIG.
Alternatively, a means may be employed in which the connecting portions 61 of 8 and 39 are formed in a tapered ellipse, and the tapered connecting portion 61 is press-fitted into the tapered suction port 41.

According to the rotary compressor 3 constructed as described above, the pipe mounting positions 55, 57 of the first and second suction pipes 38, 39 mounted on the closed case 1 can be largely separated from each other as compared with the conventional case. Therefore, the working space is secured and the welding work of the suction pipes 38, 39 by the welding machine is facilitated. Further, the remaining margin from the mounting position where the first and second suction pipes 38 and 39 are mounted to the mounting position is enlarged, and the pressure resistance of the mounting region of the closed case 1 is improved.

On the other hand, the working gas sent from the suction port 41 is compressed in the compression chamber 47 and discharged from the discharge port 37.

At the time of this operation, since the port diameter of the suction port 41 has an elliptical shape that is long in the radial direction, the suction amount of the suction port 41 does not decrease.

FIG. 12 shows the first and second suction pipes 38, 39.
2 shows another embodiment in which can be attached to the closed case 1 apart from the conventional pipe attachment position.

That is, the first and second cylinders 1 arranged side by side
The third cylinder 15 is rotated by a predetermined angle β so that the suction port 39 of the second cylinder 15 has a predetermined port extension angle θ4 from the suction port 38 of the first cylinder 13. As shown in FIG. 2, the mounting position 57 of the second suction pipe 39 with respect to the closed case 1 at this time is deviated by α from the conventional pipe mounting position a.

Therefore, according to this embodiment, in addition to the effect of the above-described embodiment, the same can be achieved by processing the port extension angle θ5 of the suction ports 41 of the cylinders 13 and 15 to be the same. It is very preferable in terms of.

13 and 14 show the first and second cylinders 1
The second suction pipe 41 connected to the suction port 41 of the second cylinder 15 is bent in a crank shape and attached to the closed case 1 under the condition that the port extension angle θ6 of the suction ports 41 of 3 and 15 is the same position. It is a thing.

In this case, as for the relationship with the suction cup 59, as shown in FIGS. 15 and 16, the second suction pipe 39 is provided with a crank-shaped connecting pipe 73, and as shown in FIG. It is desirable that the shape be compatible with the above.

Therefore, in the case of this embodiment, in addition to the effects of the above-described embodiment, each cylinder 13, 15 is
There is an advantage that the man-hours for handwork on the side are unnecessary.
Further, as shown in FIG. 14, the first suction pipe 38 can be rotated about the crankshaft center P as a fulcrum as shown by the chain line.
The mounting position 55 can be mounted at a position separated by a maximum of 180 degrees. Therefore, the distance d2 from the mounting position 55 of the first suction pipe 38 to the mounting position 57 of the second suction pipe 39 can be maximized, the working space is secured, the work by the welding machine is facilitated, and the sealing is performed. The pressure resistance of the mounting area of the case 1 can be significantly increased.

[0040]

As described above, according to the rotary compressor of the present invention, the working space is secured, the work by the welding machine is facilitated, and the pressure resistance of the mounting region of the closed case for mounting each suction pipe is improved. It becomes possible to obtain the optimum suction port area.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a rotary compressor embodying the present invention.

FIG. 2 is an explanatory view showing a mounting position of each suction pipe with respect to a closed case.

FIG. 3 is an explanatory view showing a port extension angle of a suction port on a first cylinder side.

FIG. 4 is an explanatory view showing a port extension angle of a suction port on the second cylinder side.

FIG. 5 is a front view showing a piping state of a suction cup and each suction pipe.

6 is a side view of FIG.

FIG. 7 is a perspective view showing a connected state of an elliptic suction port and a suction pipe connecting portion.

FIG. 8 is an explanatory view showing a diameter expanding means for expanding the connecting portion of the suction pipe into an elliptical diameter.

FIG. 9 is an explanatory view showing a connection state of a suction port and a suction pipe via a sealing material.

FIG. 10 is an explanatory view showing a connection state of the suction port and the suction pipe via the uneven surface.

FIG. 11 is an explanatory view showing another embodiment in which the connecting portion of the suction pipe is formed into an elliptical taper shape and press-fitted into the suction port.

FIG. 12 is an explanatory view in which one of the cylinders arranged in parallel is rotated by a predetermined angle so that the suction pipe and the suction pipe are mounted at positions separated from the conventional pipe mounting position.

FIG. 13 is an explanatory view in which one of the suction pipes is bent in a crank shape, and the suction pipes and the suction pipes are mounted at positions separated from the conventional pipe mounting position.

FIG. 14 is an explanatory view showing a mounting position of each suction pipe with respect to the closed case of FIG.

FIG. 15 is a perspective view showing the correspondence between the suction cup and the suction pipe with respect to the mounting position in the embodiment of FIG.

16 is a plan view of FIG.

[Explanation of symbols]

 1 Sealed case 13,15 Cylinder 38,39 Suction pipe 41 Suction port 57 Mounting position 61 Connection part θ3 Port extension angle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Fukuda 8 Shinsita-cho, Isogo-ku, Yokohama-shi, Kanagawa Kanagawa, Ltd. In the Institute for Living Space Systems Technology (72) Inventor Tetsuo Sano 8 Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Banchi Co., Ltd. Toshiba Living Space Systems Engineering Laboratory

Claims (4)

[Claims] 1. A compression mechanism section having a plurality of cylinders arranged in parallel in a sealed case, and a roller which is eccentrically rotated in each cylinder and discharges a working gas taken in from a suction port from a discharge port. , In a rotary compressor equipped with a plurality of suction pipes extending from the suction port of each cylinder and arranged side by side in a closed case, the suction port of one of the cylinders and the suction port of the other cylinder should have a specified port extension angle. The rotary compressor is characterized in that the installation position of one of the suction pipes arranged in parallel in the sealed case is displaced by the port extension angle of the suction port. 2. A compression mechanism section having a plurality of cylinders arranged in parallel in a hermetically sealed case, and a roller which is eccentrically rotated in each cylinder and discharges a working gas taken from a suction port from a discharge port. , In a rotary compressor having a plurality of suction pipes extending from the suction port of each cylinder and arranged in parallel in a closed case, one of the cylinders is rotated by a predetermined angle, and the suction port of that cylinder It is arranged with a predetermined port extension angle from the suction port of the cylinder, and the mounting position of one of the suction pipes arranged in parallel in the sealed case is displaced by the port extension angle of the suction port. A characteristic rotary compressor. 3. A compression mechanism section having a plurality of cylinders arranged in parallel in a sealed case, and a roller which is eccentrically rotated in each cylinder and discharges a working gas taken in from a suction port from a discharge port. , In a rotary compressor having a plurality of suction pipes extending from the suction port of each cylinder and arranged in parallel in a closed case, the suction pipe connected to the suction port of one of the cylinders arranged in parallel is cranked. A rotary compressor which is bent and attached to the closed case. 4. A compression mechanism part having a cylinder arranged in a closed case, and a roller which is eccentrically rotated in the cylinder and discharges a working gas taken in from a suction port from a discharge port, and a cylinder. In a rotary compressor having a suction pipe extended from the suction port and attached to a closed case, the suction port of the cylinder is formed in an ellipse elongated in the radial direction of the cylinder, while the connecting portion of the suction pipe is formed in an ellipse. , As the shape of the suction pipe that fits within the ellipse of the suction port,
A rotary compressor, characterized in that it is attached to the closed case.