JPH01155092A - Vane type rotary compressor - Google Patents

Abstract

PURPOSE:To reduce the extent of heat transfer from the outside to the inside of a cylinder as well as to make improvements in charging efficiency by retaining a fluid before being sucked in an operating chamber primarily in a retentive recess installed in the circumferential direction inside the cylinder. CONSTITUTION:In a vane type rotary compressor 2, a fluid discharged to a discharge space 36 rises in its temperature by compression work. Heat of this temperature upped fluid tries to be transferred to an operating chamber 18 in the inside from the outside of a cylinder 4 in an enclosed body 28. But since the fluid before being sucked in the operating chamber 8 is temporarily retained in a retentive recess 42 installed over almost the whole area in the circumferential direction inside the cylinder 4, heat transfer to the inside of the cylinder 4 is reduced. Consequently, since a temperature rise in the operating chamber 8 is thus preventable, the temperature rise in the fluid being sucked in is prevented from occurring. With this constitution, the fluid is sufficiently sucked in the operating chamber 8 so that charging efficiency is improvable.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vane-type rotary compressor, and particularly to a vane-type rotary compressor that can reduce heat transfer into the vane-type rotary compressor and improve filling efficiency. Moreover, the present invention relates to a vane type rotary compressor that does not cause a decrease in efficiency of equipment used in the vane type rotary pressure compressor.

[Conventional technology]

Rotary compressors include rolling piston type, slide vane type, and turbo type. Among these various types of rotary compressors, the vane type rotary compressor has a cylindrical rotor rotatably provided within a cylinder. The rotor rotates with its outer circumferential surface in contact with the inner circumferential surface of the cylinder at at least one point, and is in full contact with the inner circumferential surface within a groove formed in the outer circumferential surface in a substantially radial direction with respect to the center of the rotor. A vane is provided so that it can appear and appear.

As a result, the vane type rotary compressor partitions a working chamber between the inner circumferential surface of the cylinder and the outer circumferential surface of the rotor as the rotor rotates, and which moves while expanding and contracting in the rotor rotational direction by the vanes. It sucks in fluid, compresses it, and then discharges it. This vane type rotary compressor is used, for example, in an air conditioner that compresses and supplies refrigerant gas or the like.

[Problems to be Solved by the Invention] By the way, the temperature of the fluid discharged from the discharge port of the vane type rotary compressor increases due to compression work. If the heat of the fluid whose temperature has increased is transferred to the working chamber within the cylinder, there is an inconvenience that the filling efficiency is reduced.

Therefore, JP-A-61. As disclosed in Publication No. 96197, a condenser is provided to dissipate the heat of the high-temperature, high-pressure fluid compressed by the working chamber of the compressor, and a portion of the fluid that has become low-temperature and high-pressure due to the heat dissipated by this condenser is transferred to the cylinder. There is a system that lowers the temperature of the compressor and improves the filling efficiency by introducing it into the working chamber of the compressor and evaporating it.

However, the method disclosed in this publication introduces a portion of the low-temperature, high-pressure fluid into the working chamber in the cylinder, so when this compressor is used, for example, in an air conditioner, the discharge of the compressor There is a disadvantage that not all of the fluid to be used can be supplied to the evaporator. For this reason, the equipment used for the compressor,
For example, there is a disadvantage that the efficiency of an air conditioner or the like is reduced.

[Object of the Invention] Therefore, an object of the present invention is to reduce the heat transfer into the vane-type rotary compressor and improve the filling efficiency, and to improve the efficiency of the equipment in which the vane-type rotary compressor is used. The object of the present invention is to realize a vane type rotary compressor that does not cause deterioration.

[Means for solving problems]

In order to achieve this object, the present invention utilizes a cylinder, a rotor rotatably provided in the cylinder, and vanes retractably provided in a groove formed substantially radially with respect to the center of the rotor. In a vane-type rotary compressor that partitions a working chamber that moves while expanding and contracting in the rotational direction of the rotor, a retention recess is provided in the circumferential direction within the cylinder to temporarily retain fluid before being sucked into the working chamber. It is characterized by:

[Effect]

According to the configuration of the present invention, by temporarily retaining the fluid before being sucked into the working chamber in the retention recess provided in the circumferential direction within the cylinder, heat is transferred from the outside to the inside of the cylinder by this fluid. is reduced.

In this way, by reducing heat transfer from the outside to the inside of the cylinder, it is possible to prevent a temperature rise in the working chamber of the vane type rotary compressor. Further, when this vane type rotary compressor is used in equipment, all of the fluid discharged from the working chamber can be supplied to the equipment.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to figures.

Figures 1 and 2 show an embodiment of this invention.

In the figure, 2 is a vane type rotary compressor, 4 is a cylinder,
6 is a rotor, 8 is a vane, and 10 and 12 are side plates.

The cylinder 4 has an elliptical inner peripheral surface 4a inside, and two side plates 10 and 12 are fixed on both sides.

The rotor 6 has a circular outer peripheral surface 6a, and is rotatably provided within the inner peripheral surface 4a of the cylinder 4. This rotor 6 has an outer circumferential surface 6a connected to an inner circumferential surface 4 of the cylinder 4.
In this example, at least one location in a,
The shaft portions 14a on both sides rotate while touching at two places.
It is supported by the two side plates 10 and 12 by 14b.

A plurality of grooves 16 are formed in the outer circumferential surface 6a of this potter's wheel in a substantially radial direction with respect to the center. The vane 8 is
It is provided in this groove portion 16 so as to be able to protrude and retract toward the inner circumferential surface 4a of the cylinder 4.

These cylinder 4, rotor 6, vane 8 and side plate 10.
12 define a working chamber 18 that moves while expanding and contracting in the rotational direction of the rotor 6.

This working chamber 18 is provided with an inlet port 20 and a discharge port 22 that are open. The suction port 20 and the discharge port 22 are provided at a front position and a rear position in the rotor rotation direction (direction of arrow A) at a portion where the cylinder 40 and the rotor 6 are in contact with each other. A suction passage 24 is provided in communication with the suction port 20, and a discharge valve 26 for preventing backflow is provided in the discharge port 22.

Furthermore, the cylinder 4 is covered by a covering body 28 . The enclosure 28 is provided with a fluid inlet boat 30 and an outlet boat 32.

When the rotor 6 in the cylinder 4 is rotated, the vane 8
The cylinder slides in contact with the elliptical inner peripheral surface 4a of the cylinder 4 due to centrifugal force or back pressure acting in the groove 16, and moves in the rotor rotational direction while expanding and contracting the working chamber 18. Due to the expansion and contraction of the working chamber 18, the fluid, such as refrigerant gas, that flows into the suction passage 24 from the inlet boat 30,
After being sucked into the working chamber 18 through the suction port 20 and compressed, it is discharged through the discharge port 22 by pushing open the discharge valve 26. The fluid discharged from the discharge port 22 is separated from lubricating oil by an oil separator 34, and then transferred to a high pressure chamber 3, which is a discharge space within the envelope 28.
6, and is supplied from the outlet boat 32 to a desired site, such as a condenser of an air Showa device. Furthermore, the lubricating oil separated by the oil separator 34 is transferred to the high pressure chamber 36.
It is stored in the lower oil storage chamber 3B. The lubricating oil in the oil storage chamber 3B is supplied to various parts such as bearing parts and sliding parts through an oil passage 40 to lubricate each part.

In such a vane type rotary compressor 2, a retention place 42 is provided within the cylinder 4. This residence 42 is
In this embodiment, it is provided in the circumferential direction within the cylinder 4 over substantially the entire circumferential area, and is provided in communication with the suction passage 24 . Thereby, the retention place 42 temporarily retains the fluid before it flows into the pressure-feeding chamber 18 .

Next, the effect will be explained.

When the rotor 6 in the cylinder 4 is rotated, the vane 8
slides in contact with the elliptical inner circumferential surface 4a of the cylinder 4 due to centrifugal force or back pressure in the groove 16, thereby forming the working chamber 18.
moves in the direction of rotor rotation while expanding and contracting. By expanding and contracting the working chamber 18, the suction passage 2 is opened from the inlet boat 30.
The fluid, such as refrigerant gas, that has flowed into the chamber 4 is sucked into the working chamber 18 from the suction port 20 and compressed, and then passes through the discharge port 22.
Press open the discharge valve 26 to create a discharge space 36 in the envelope 28.
is discharged.

The temperature of the fluid discharged into the discharge space 36 has increased due to compression work. The heat of this increased temperature of the fluid is
Working chamber 18 from the outside of the cylinder 4 inside the envelope 28
attempts to transfer heat to However, since the fluid before being sucked into the working chamber 18 is temporarily retained in the retention area 42 provided over almost the entire circumferential direction within the cylinder 4, heat transfer to the inside of the cylinder 4 is prevented by this fluid. reduced.

Therefore, it is possible to prevent the temperature of the working chamber 18 from rising, thereby preventing the temperature of the fluid being sucked from rising. Thereby, the fluid can be sufficiently sucked into the working chamber 18 and the filling efficiency can be improved.

In addition, unlike conventional methods, a part of the fluid discharged by the compressor is not introduced into the working chamber for cooling, but the fluid sucked into the working chamber reduces heat transfer. All of the fluid discharged by the compressor can be supplied to the equipment being used, improving the efficiency of the equipment.

〔Effect of the invention〕

As described above, according to the present invention, by temporarily retaining the fluid before being sucked into the working chamber in the retention area provided in the circumferential direction within the cylinder, this fluid can be used to move the fluid from the outside to the inside of the cylinder. Heat transfer is reduced.

In this way, by reducing heat transfer from the outside to the inside of the cylinder, it is possible to prevent a temperature rise in the working chamber of the vane type rotary compressor. Therefore, the filling efficiency of the vane type rotary compressor can be improved. Further, when this vane type rotary compressor is used in equipment, all of the fluid discharged from the working chamber can be supplied to the equipment. Therefore, it is possible to avoid the conventional inconvenience of not being able to supply all of the fluid discharged to the equipment by introducing a part of the fluid discharged by the compressor into the working chamber of the compressor and cooling it. There is no risk of reducing the efficiency of equipment used in the rotary compressor.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a sectional view of the rotor portion of a Hoehne rotary compressor,
The figure is a partially cutaway sectional view of a vane-type rotary compressor. In the figure, 2 is a vane type rotary compressor, 4 is a cylinder,
6 is the rotor, 8 is the vane, 10 and 12 are the side plates, 16 is the groove, 18 is the working chamber, 20 is the suction port, 22 is the discharge port, 24
26 is a suction passage, 26 is a discharge valve, 28 is an envelope, 36 is a high pressure chamber, 38 is an oil storage chamber, and 42 is a retention place. Patent applicant: Suzuki Automobile Industry Co., Ltd. Agent: Yoshimi Nishigo, patent attorney

Claims (1)

[Claims] A working chamber that moves while expanding and contracting in the rotor rotational direction is formed by a cylinder, a rotor rotatably installed in the cylinder, and a vane retractably installed in a groove formed approximately radially to the center of the rotor. What is claimed is: 1. A vane-type rotary compressor with compartmentalization, characterized in that a retention recess is provided in the circumferential direction within the cylinder for temporarily retaining fluid before being sucked into the working chamber.