JPS5844281A - Swash-plate type compressor - Google Patents

Abstract

PURPOSE:To increase the rate at which mixture gas of refrigerant gas and freezer oil flows into a shaft by using as bypasses of refrigerant gas return passages for it which intersect suction gas passages formed on the periphery of a cylinder. CONSTITUTION:Refrigerant gas return passages 10 which are formed as to encircle the periphery of a cylinder 1 intersect suction gas passage 4 which are shaped in the lengthwise direction of the cylinder 1 and cored holes 5. If mixture gas flows into a shaft 6, the mixture gas runs through friction parts for separation into refrigerant gas and freezer oil. The refrigerant gas flows through the return passages 10 and is returned to the suction passages 4 while the freezer oil is deposited in a storage part 9 at the bottom of the cylinder 1 to provide complete lubrication. The bypass passages for the refrigerant gas and the freezer oil may be therefore ensured so that the rate at which the mixture gas of the refrigerant gas and the freezer oil flows into the shaft 1 may be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a swash plate type compressor that is lubricated with refrigerant gas and refrigerating machine oil in a mist state, and has a structure that prevents the refrigerating machine oil from leaking to the outside of the compressor. It is related to compressors.

Figures 1 and 2 are perspective and perspective views showing the structure of a conventional swash plate compressor, in which 1 is a cylinder, 2 is a perspective view of a conventional swash plate compressor;
3 is the housing that accommodates the cylinder l, and 3 is the housing 2.
a suction port provided externally, 4 a suction gas passage provided in the longitudinal direction of the outer circumference of the cylinder 1;
5 is a cast hole, 6 is a shaft, 7 is a swash plate, 8 is a piston, and 9 is a refrigerator oil sump.

In the above structure, refrigeration oil flows in from the suction port 3 together with refrigerant gas, is supplied to the suction gas passage 4 on the outer periphery of the cylinder 1, and is divided into the cylinder as shown by the arrow. Using the flow velocity of the mixed gas, the swash plate is passed through the hole in the shaft 6.
Sliding parts such as shoe discs, bezels, rings, etc. are lubricated. By the way, in the above structure, cylinder l
The difference between the diameter D1 of the housing 2 and the inner diameter D2 of the housing 2 (D2
- Dl) is designed to be very narrow, so even if a cast hole 5 is provided around the sill 1, the shaft 7
The mixed gas flowing in from port 6 has a discharge path of Pg. That is, even if the mixed gas of refrigerant gas and refrigerating machine oil that has flowed in from the shaft 6 in a mist state is separated at the sliding portion, there is no path for the refrigerant gas to exit. As a result, the amount of mixed gas flowing in from the shaft 6 is limited, so the separation efficiency between the refrigerant gas and the refrigeration oil decreases, and the fractionated liquid flows into the inside of the cylinder, causing refrigeration outside the compressor. Refrigerant oil begins to leak into the cycle.

This reduces the lubricating effect of the sliding parts and causes heat generation.1. This reduces the thermal conductivity of components such as the evaporator and condenser in the refrigeration cycle, causing problems in their function as heat exchangers.

The present invention has been made in response to the above problems.

A refrigerant gas return passage is provided to intersect with the suction gas passage provided on the outer circumference of the cylinder. To provide a swash plate type compressor which eliminates the conventional drawbacks by having a structure that increases the flow rate of a mixed gas of refrigerant gas and refrigerating machine oil flowing from inside the shirt (by using a refrigerant gas discharge path). The purpose is to

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a perspective view showing a compressor according to an embodiment of the present invention. %lO is a refrigerant gas return passage provided so as to go around the outer circumference of the cylinder l, and a suction gas passage 4 provided in the longitudinal direction of the cylinder l. and is provided so as to intersect with the cast hole 5.

With the above structure, when mixed gas flows into the shaft 6, the mixed gases that have passed through the sliding parts are separated, and then the refrigerant gas passes through the return passage 10 and returns to the suction gas passage 4 again. .

Also, the refrigerating machine oil is stored in a reservoir 9 provided at the bottom of the cylinder l.
(...in the gap formed between the housing and the housing 2), and a complete lubrication effect can be achieved.

Therefore, since a drainage path for refrigerant gas and refrigerating machine oil is secured, the mixed gas can quickly flow into the shaft, making it easy to increase the flow rate.

As is clear from the above description, according to the present invention, the refrigerant gas return passage is provided so as to intersect with the suction gas passage provided on the outer periphery of the cylinder. Gas and refrigerating machine oil can now flow in quickly and in large quantities, improving the efficiency of separating refrigerant gas and refrigerating machine oil.

Only the refrigerant gas can be quickly returned to the refrigerant suction passage.

Therefore, since refrigerating machine oil is prevented from leaking into the refrigerating cycle outside the compressor,
The influence on the parts constituting the refrigeration cycle, such as the condenser, is improved, and the lubrication effect of the sliding parts is also improved, so that the heat exchanger can perform efficient and desirable operations.

[Brief explanation of the drawing]

1 and 2 are both a perspective view and a transparent view showing the conventional example 4, FIG. 3 is a perspective view showing the embodiment of the present invention, and FIG. 4 (
a) and (b) are cross-sectional views showing embodiment Y of the present invention.
Cylinder, 2...Housing, 3...Suction boat, 4...Suction gas passage %6...Shaft, 9...Refrigerating machine reservoir part, IO...Refrigerant gas return passage. Patent applicant Clarion Co., Ltd.

Claims (1)

[Scope of Claims] l. A swash plate compressor, characterized in that a refrigerant gas return passage is provided to intersect with a suction gas passage provided in the longitudinal direction of the outer circumference of the cylinder. 2. The swash plate type compressor according to claim 1, wherein the refrigerant gas return passage is provided so as to go around the outer periphery of the cylinder.