JPH048892A - Liquid level rise prevention device for mixture of refrigerator oil and refrigerant in closed type compressor - Google Patents

Abstract

PURPOSE:To maintain a constant liquid level, whether a closed type compressor is at rest, in operation or otherwise, and improve the reliability of the compressor by making the compressor continuous to a liquid reservoir section at one side thereof via a communication pipe and another pipe fitted with a nonreturn valve. CONSTITUTION:When a closed type compressor is at rest, a refrigerant is dissolved in refrigerator oil 7 in a closed vessel 1, and a liquid level in the vessel 1 increases accordingly. Actually, however, the increased refrigerator oil 7 is made to flow to a liquid reservoir section 4 via a communication pipe 5 fitted at an allowable liquid level, thereby preventing an increase in liquid level. On the other hand, when the compressor is operating, the refrigerator oil 7 is as well carried to a system, together with delivered gas and, therefore, the liquid level drops. In this case, the liquid is made to flow from the liquid reservoir section 4 to the closed vessel 1 having a lower liquid level. In addition, the liquid level in the liquid reservoir section 4 becomes minimum during the operation of the compressor. Even when the liquid level in the vessel 1 increases, therefore, no liquid reversely flows to the liquid reservoir section 4, due to the nonreturn valve of a pipe 6, thereby maintaining a constant liquid level in the closed type compressor.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for preventing a rise in the liquid level of a refrigeration oil/refrigerant mixture in a hermetic compressor used in a cooling system of a refrigeration/air conditioner or the like.

Conventional technology In recent years, when hermetic compressors are stopped, refrigerant dissolves in the refrigerating machine oil inside the compressor, causing the liquid level to rise, and a large amount of liquid is sucked in at the beginning of startup. Since this affects the insulation of the motor, there is an increasing need to prevent the liquid level from rising when the motor is stopped.

An example of a conventional closed-type pressure S machine for preventing liquid level rise will be described below with reference to the drawings.

FIG. 2 is shown in Japanese Utility Model Publication No. 58-75978, and is an external view of a closed-type compressor.

In FIG. 2, 21 is a hermetic compressor, and a crankcase heater mechanism that heats the refrigerating machine oil stored in the hermetic compressor 21 on the outer wall of the hermetic container 22 is as follows:
The operation will be explained below.

When the closed type pressure S machine 21 is stopped, the crankcase heater 23
By energizing, the hermetic container 22 is heated, and the refrigerant is prevented from dissolving in the refrigerating machine oil stored in the hermetic compressor 21, thereby preventing the liquid level from rising.

Problems to be Solved by the Invention However, the above-mentioned method has problems such as being unable to prevent the liquid level from rising when the power supply is stopped, such as during a power outage.

In view of the above-mentioned problems, the present invention is based on a saliva reservoir component that is installed in parallel with the hermetic container of a hermetic compressor. This invention provides a hermetic compressor that prevents the liquid level from rising in the hermetic compressor.

Means for Solving the Problems In order to solve the above-mentioned problems, the liquid level rise prevention mechanism of the hermetic type electric compressor a of the present invention has the following features: It consists of a reservoir part, a communication pipe that communicates the two, and a pipe with a check valve.

Effect The present invention has the above-described configuration, so that even when the hermetic compressor is stopped, the refrigerant is dissolved in the refrigerating machine oil, and the liquid level rises.
The refrigerating machine oil refrigerant mixture flows into the reservoir parts through the communication pipe, thereby preventing the liquid level from rising.

EXAMPLE Hereinafter, a liquid level rise prevention mechanism for a hermetic compressor according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional structural diagram of a hermetic compressor according to the first embodiment of the present invention.

In FIG. 1, 1 is an airtight container, 2 is an electric element, 3 is a compression element, 4 is a liquid reservoir part, 6 is a communication pipe that communicates the airtight container and the liquid reservoir part, and 6 is a communication pipe that communicates the airtight container and the liquid reservoir part. The pipe that connects the non-return parts to the check valve, 7, is refrigerating machine oil.

The operation of the liquid level rise prevention mechanism of the hermetic compressor constructed as described above will be explained using FIG. 1.

When the hermetic compressor is stopped, the refrigerant enters the frozen oil inside the hermetic container 1 and the liquid level rises, but it passes through the communicating vibro installed at an acceptable liquid level position. The rising refrigerating machine oil 7 flows into the liquid reservoir part 4 to prevent the liquid level from rising.

Conversely, during operation, the refrigerating machine oil 7 is also taken out to the system (not shown) along with the discharged gas, so the liquid level decreases. In this case, liquid flows from the liquid reservoir part 4 into the lowered closed container 1 through the pipe 6 with a reverse valve. Liquid reservoir parts 4
The liquid level inside the tank will be at the lowest level during operation.
Even if the liquid level in the hermetic container rises, the check valve of the Vibro with a check valve prevents it from flowing back into the liquid reservoir parts, and the liquid level in the hermetic compressor is maintained at a constant level. Ru.

As described above, according to this embodiment, the closing type pressure f! It is possible to provide a compressor that can keep the liquid level on the rock at a constant level even when it is stopped and when it is in operation.

Effects of the Invention As described above, the present invention includes a liquid reservoir component provided in parallel to a closed container of a closed type pressure N machine, a communication pipe that communicates the closed container with the liquid reservoir component, and a check valve. Consisting of a pipe, when the liquid level rises, liquid flows into the liquid reservoir parts from the communicating pipe, and conversely, when the liquid level in the sealed container drops, it flows into the liquid reservoir parts through a pipe with a reversal valve. By allowing the liquid to flow into the sealed container, a constant liquid level can be maintained regardless of whether the machine is stopped or running, which prevents destruction of the pulp and the like due to suction of a large amount of liquid, as well as seepage of the motor part. It is possible to measure the improvement in reliability.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional structural diagram of a hermetic compressor according to an embodiment of the present invention, and FIG. 2 is an external view of a conventional hermetic compressor @ Kazufuse VJ of Iso. 1... Airtight container, 2... Electric element, 3
...pressure element, 4...liquid reservoir parts, 5
......Communication pipe, 6...Pipe with check valve.

Claims (1)

[Claims] Consisting of a liquid reservoir part provided in parallel with the hermetic container of the hermetic compressor, a communicating pipe, the sealed container, a communicating pipe communicating the liquid reservoir part, and a check valve equipped pipe. A device for preventing a rise in the liquid level of a refrigeration oil/refrigerant mixture for a hermetic compressor, which is characterized by: