JPH07247972A - Rotary compressor - Google Patents

Abstract

PURPOSE:To streamline discharge gas, to reduce noise due to pulsation, and to hold down flow resistance so as to improve efficiency. CONSTITUTION:In a rotary compressor so constructed that gas taken in from a suction port 25 is compressed in a cylinder 11 and discharged from a discharge port 29 surrounded with a muffler chamber 39, the discharge port 29 is provided with a valve body 35 for controlling the discharge port 29 to be opened and closed and a valve stopper 37 for limiting the opening of the valve body 35, and an inhibit member 47 for inhibiting gas from going round to the back side of the valve stopper 37 is installed between the valve stopper 37 and the top plate 45 of the muffler chamber 39.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor capable of suppressing noise due to pulsation.

[0002]

2. Description of the Related Art Generally, the outline of a rotary compressor is as follows.
In the cylinder, a roller fitted to the eccentric shaft portion to which rotational power is applied is provided, and the gas taken in from the suction port is compressed in the cylinder by the eccentric rotation of the roller.
It comes to be discharged from the discharge port.

The discharge port has a structure in which a valve body for opening and closing the discharge port and a valve stopper for limiting the opening degree of the valve body are provided.

[0004]

As described above, the valve element provided in the discharge port controls the discharge amount from the discharge port, but on the other hand, it serves as an obstacle that obstructs the flow of discharge gas.

For this reason, when the gas discharged from the discharge port hits the valve body, the back side of the valve body and the valve stopper becomes a negative pressure region, and due to this, the gas is entrained and a vortex is formed. , Becomes a complicated flow.

This complicated flow causes a pulsating phenomenon and causes noise. In addition, it becomes a fluid resistance and causes a decrease in efficiency.

Therefore, it is an object of the present invention to provide a rotary compressor which rectifies the flow of discharge gas from a discharge port to reduce noise and fluid resistance.

[0008]

In order to achieve the above object, the present invention is designed so that gas taken in from a suction port is compressed in a cylinder and discharged from a discharge port surrounded by a muffler chamber. In the rotary compressor, a valve body that controls the opening and closing of the discharge port and a valve stopper that limits the opening of the valve body are provided in the discharge port, and the back side of the valve stopper is provided between the valve stopper and the top plate of the muffler chamber. A deterrent member is provided to deter gas from flowing into the space.

In a preferred embodiment in which the restraint member is provided, the restraint member formed as a separate member is directly provided on the back side of the valve stopper or the top plate side of the muffler chamber. Alternatively, in order to reduce the number of parts, the top plate of the muffler chamber may be made to project toward the valve stopper side to serve as a restraining member integrated with the top plate. In this case, the restraining member can also have a shape that doubles as a valve stopper. Further, the back side of the valve stopper may be made to project toward the top plate side of the muffler chamber to form a restraining member integrated with the valve stopper.

[0010]

With this rotary compressor, the gas taken in from the suction port is compressed in the cylinder,
It comes to be discharged from the discharge port.

At the time of this discharge, the gas discharged from the discharge port is rectified by the restraining member, so that a smooth flow is ensured, and noise reduction due to pulsation and outflow resistance are suppressed to a small level.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described in detail below with reference to the drawings of FIGS.

In FIG. 1, reference numeral 1 denotes a sealed case of the rotary compressor 3. An electric motor unit 5 and a compressor unit 9 are provided in the closed case 1, respectively.
Is composed of a stator 7 and a rotor 8, and the compressor section 9 is composed of a cylinder 11 and a roller 13. The rotor 8 constituting the electric motor unit 5 is fixed to a shaft 15 and the shaft 15 is rotatably supported by a main bearing 17 and a sub bearing 19.
An eccentric shaft portion 21 is provided on the shaft 15, and the roller 13 is fitted to the eccentric shaft portion 21. As a result, the roller 13 is eccentrically rotated by the rotation of the eccentric shaft portion 21.

The main bearing 17 has a discharge port 29 communicating with the discharge pipe 27, and the cylinder 11 has a suction port 25 communicating with the suction pipe 23 and a biasing means (not shown) such as a back pressure or a spring. ) By the roller 13
Blades 31 that are in constant contact with the outer peripheral surface of the compression chamber 33.
Is being made.

The discharge port 29 is provided with a valve body 35 for controlling the discharge amount from the discharge port 29 and a valve stopper 37 for limiting the opening degree of the valve body 35.

The valve body 35 and the valve stopper 37 are surrounded by a muffler chamber 39 and fixed to the main bearing 17 with screws 41. The valve body 35 is formed of a spring plate material and has an opening that increases in proportion to the discharge pressure, and functions to close the discharge port 29 due to the difference between the pressure in the compression chamber and the pressure in the muffler chamber.

The muffler chamber 39 is formed separately and is fixed to the main bearing 17 with bolts 43. On the other hand, between the back portion of the valve stopper 37 and the top plate 45 of the muffler chamber 39, a restraining member 47 that restrains the gas from flowing around to the back portion side of the valve stopper 37 is provided.

The restraining member 47 is formed as a separate member as shown in FIG. 3, and has a shape having a width substantially the same as the width of the valve stopper 37 and a height close to the top plate 45 of the muffler chamber 39. And is fixed to the back of the valve stopper 37.

As a result, the space from the back of the valve stopper 37 to the top plate 45 of the muffler chamber 39 is occupied, and the shape is such that turbulent flow due to gas wraparound does not occur.

In FIG. 1, reference numeral 49 indicates an accumulator.

According to the rotary compressor thus constructed, the gas taken in through the suction port 25 is
Due to the eccentric rotation of the roller 13, it is compressed in the cylinder 11 and discharged from the discharge port 29.

During this discharging operation, the gas is rectified by the restraining member 47 and is discharged smoothly. Therefore, the pulsating noise due to the turbulent flow can be suppressed to a low level.

FIG. 4 shows a modified example of the mounting position of the restraining member 47, which is a top plate 45 of the muffler chamber 39 that can be retrofitted.
In addition, it serves as means for directly fixing the restraining member 47. Since the other constituents are the same as those in the above-mentioned embodiment, the same reference numerals are given and the description thereof will be omitted.

According to this embodiment, in addition to the effect of reducing the noise and the fluid resistance described above, since the restraining member 47 is attached to the top plate 45 of the muffler chamber 39, it is easy and easy to attach, and is easy to attach. Is excellent in terms of.

FIG. 5 shows a first modification of the restraint member 47. The top plate 45 of the muffler chamber 39 is projected toward the valve stopper 37 side, and the projecting portion is integrally formed with the top plate 45. It has become 47. Since the other constituents are the same as those in the above-mentioned embodiment, the same reference numerals are given and the description thereof will be omitted.

According to this embodiment, in addition to the effect of reducing the noise and the fluid resistance described above, by pressing, the restraining member 47 can be obtained, which is excellent in terms of workability and parts. The points can be reduced.

FIG. 6 shows a second modified example of the restraining member 47, in which the back side of the valve stopper 37 is projected toward the top plate 45 side of the muffler chamber 39, and the projecting portion is made into the valve stopper 3
7 is a means integrally formed with the restraining member 47.

Since the other constituents are the same as those in the above embodiment, the same reference numerals are given and the description thereof will be omitted.

According to this embodiment, in addition to the effect of reducing noise and fluid resistance described above, the valve stopper 37
Since the restraining member 47 can be formed integrally with the above, the number of parts can be reduced.

FIG. 7 shows a third modified example of the restraining member 47. The top plate 45 of the muffler chamber 39 is projected toward the valve body 35 side, and the projecting portion thereof is formed integrally with the top plate 45. It serves as a member 47 and also as a valve stopper 37.

Since the other constituents are the same as those in the above-mentioned embodiment, the same reference numerals are given and the description thereof will be omitted.

According to this embodiment, in addition to the above-described effect of reducing noise and fluid resistance, press working allows the suppression member 47 and the valve stopper 37 to be obtained at the same time. It is excellent and can reduce the number of parts.

[0033]

As described above, according to the rotary compressor of the present invention, since the discharge gas discharged from the discharge port can be rectified by the restraining member, the noise due to the pulsating flow can be reduced. In addition, the fluid resistance can be reduced and the efficiency can be improved. There is also an advantage that the number of parts can be deleted.

[Brief description of drawings]

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

FIG. 2 is a sectional view of a cylinder.

FIG. 3 is a cutting explanatory view of a main portion in which a deterrent member is provided on the valve stopper side.

FIG. 4 is a cutting explanatory diagram of a main part in which a suppressing member is provided on a top plate side of a muffler chamber.

FIG. 5 is a cutting explanatory view of a main part in which a suppressing member is formed integrally with a top plate of a muffler chamber.

FIG. 6 is a cutting explanatory view of a main portion in which a deterrent member is integrally provided on the back side of the valve stopper.

FIG. 7 is a cutting explanatory view of a main part in which a suppressing member is formed integrally with a ceiling plate of a muffler chamber and a function of a valve stopper is obtained.

[Explanation of symbols]

 11 Cylinder 29 Discharge Port 35 Valve Body 37 Valve Stopper 39 Muffler Chamber 45 Top Plate 47 Suppression Member

Claims (6)

[Claims] 1. A rotary compressor in which a gas taken in from a suction port is compressed in a cylinder and is discharged from a discharge port surrounded by a muffler chamber, and a valve for controlling opening and closing of the discharge port to the discharge port. Body and a valve stopper that limits the opening of the valve body, and a restraining member that restrains gas from flowing to the back side of the valve stopper is provided between the valve stopper and the top plate of the muffler chamber. And a rotary compressor. 2. A rotary compressor in which a gas taken in from a suction port is compressed in a cylinder and discharged from a discharge port surrounded by a muffler chamber, the valve controlling the opening and closing of the discharge port to the discharge port. A body and a valve stopper for limiting the opening of the valve body, and a restraining member for restraining gas from flowing around to the back side of the valve stopper is provided at a back portion of the valve stopper. Rotary compressor. 3. A rotary compressor in which a gas taken in from a suction port is compressed in a cylinder and is discharged from a discharge port surrounded by a muffler chamber, wherein a valve for controlling opening / closing of the discharge port is provided at the discharge port. Body and a valve stopper for limiting the opening of the valve body, and a top plate of the muffler chamber is provided with a restraining member formed of a separate member for restraining gas from flowing around to the back side of the valve stopper. Rotary compressor. 4. A rotary compressor in which a gas taken in from a suction port is compressed in a cylinder and is discharged from a discharge port surrounded by a muffler chamber. A valve for controlling opening and closing of the discharge port to the discharge port. Body and a valve stopper that restricts the opening of the valve body, are continuously formed integrally with the top plate of the muffler chamber, and a restraining member that restrains gas from flowing to the back side of the valve stopper is provided. A characteristic rotary compressor. 5. A rotary compressor in which a gas taken in from a suction port is compressed in a cylinder and discharged from a discharge port surrounded by a muffler chamber, and a valve for controlling opening and closing of the discharge port to the discharge port. Body and a valve stopper for limiting the opening of the valve body are formed integrally with the valve stopper, and a restraining member for restraining gas from flowing to the back side of the valve stopper is provided. compressor. 6. A rotary compressor in which a gas taken in from a suction port is compressed in a cylinder and is discharged from a discharge port surrounded by a muffler chamber. A valve for controlling opening / closing of the discharge port to the discharge port. A body is provided, and an overhanging portion integrally projecting from the top plate of the muffler chamber toward the back side of the valve body is provided. A rotary compressor characterized by being a deterrent means for deterring the sneak of gas of the above.