JPS60126553A - Refrigerator with rotary compressor having fluid control function - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is applicable to household refrigerators, freezers, ice makers,
This invention relates to refrigeration equipment used in air conditioners and the like.

Conventional configuration and its problems The configuration of a conventional example will be explained with reference to FIG.

In the figure, 1 is a rotary compressor with a fluid control function (hereinafter simply referred to as a rotary compressor),
As is well known, an electric motor 3 consisting of a stator 3a and a rotor 3b is press-fitted into the high-pressure container 2.

Also, the side plate 5 and cylinder 6 fixed by welding 4
A compression element 9, which is formed by overlapping the side plates 7 and forming a compression chamber 8, is housed therein. 10 is a rotary piston mounted on the eccentric part 11a of the crankshaft 11 in the cylinder T;
12 is an oil pump that sends oil 13 to the rotating and sliding parts. 14 is a discharge tube that discharges the compressed gas from the compression chamber 8 into the space inside the high-pressure container 2 via a discharge valve (not shown), and 15 is a suction tube that directly guides the gas from the evaporator 16 to the compression chamber 8. A low-pressure valve 17 is interposed in the portion of the pipe located inside the high-pressure container 2 without functioning as a check valve.

This low pressure valve 17 has an inlet portion 17a5, a valve seat 17b, and a general disc valve 1 having a disc shape with a plurality of notches on the outer periphery.
7c, a stopper 17d for regulating the lift amount of the disc valve 17c, and an outlet portion 17e. 18 is a discharge pipe, and is equipped with a high-pressure valve 19 that uses, for example, an electromagnetic type or gas pressure.

On the other hand, as a refrigeration system, for example, if we explain it as a general refrigerator system, 20 is an auxiliary condenser into which high-temperature and high-pressure refrigerant gas flows first from the discharge pipe 18, and is used to defrost the evaporator 16 when the box is removed. A drain pan 21 for evaporating water is placed. 22 is a tri-vibrator arranged at the opening edge inside the refrigerator; 23 is a condenser; the dry pipe 22 and the condenser 23 constitute a main condenser 24. 26 is a pressure reducer made of a capillary tube.

In this configuration, when the rotary compressor 1 is operated, the gas compressed in the compression chamber 8 is once discharged from the discharge tube 14 into the high-pressure container 2, and is then auxiliary condensed via the high-pressure valve 19, which is opened during operation. Vessel 20. The refrigerant flows through the main condenser 24, the pressure reducer 25, and the evaporator 16. And the disc valve 17c of the low pressure valve 17 in the suction pipe 15
is blown up by the flow energy to open the circuit, return to the compression chamber 8, and cool the inside of the refrigerator.

Next, when a thermostat (not shown) inside the refrigerator detects that the temperature inside the refrigerator reaches a predetermined temperature, the rotary compressor 1 is stopped and the high pressure valve 19 is closed. At this time, the high-pressure gas in the high-pressure container 2 breaks the oil seal that separated the high and low pressures in the compression chamber 8, and the high-pressure gas flows to the low-pressure side of the compression chamber 8 and attempts to flow backward through the suction pipe 15, but the pressure is already low. The disc valve 17c in the valve 17 closes the valve seat 17b due to its own weight, and the high pressure vessel 2 is stopped.
The internal pressure is maintained at a level slightly lower than the operating pressure.

That is, while the compressor is stopped, the high-pressure, high-temperature cassette inside the high-pressure container 2 is confined within the rotary compressor 1.

loss (thermal load) during shutdown to the evaporator 16
However, there are still drawbacks caused by the refrigerant in the auxiliary and main condensers 20,24 flowing into the evaporator 16.

On the other hand, in order to further reduce these losses while the rotary compressor 1 is stopped, the evaporator 1
6 has been proposed to prevent high-temperature refrigerant from flowing into 6, but such a system requires a complicated electrical circuit or piping configuration for the cooling system. There was a problem in that it could not be immediately incorporated into existing systems or refrigeration equipment with electrical connections. On the other hand, although it will not be disclosed again, it is well known that rotary compressors generally have a large temperature rise, and that an auxiliary condenser called a precooler is used for cooling the rotary compressor.

In such a case, an auxiliary condenser 1 is required,
If such a system were simply to incorporate a conventional rotary compressor with a high-low pressure valve, there would be a problem in that refrigerant in the auxiliary condenser would flow into the evaporator when the rotary compressor was stopped, increasing heat loss.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned problems, firstly because it can be simply integrated into an existing cooling system, and secondly when using a pre-cooler, the high temperature in the auxiliary condenser can be reduced. The problem is that the refrigerant cannot be prevented from flowing into the evaporator while the rotary compressor is stopped, and the rotary compressor cannot be prevented from being cooled while the rotary compressor is stopped.

Structure of the Invention In order to achieve the above object, an inner cooler pipe is provided in the high pressure container of the rotary compressor, a high pressure valve that is closed when the rotary compressor is stopped is provided, and a high pressure valve is provided between the discharge pipe and the inlet of the inner cooler pipe. An auxiliary condenser is connected, and the inner cooler pipe outlet is connected to the main condenser.When the rotary compressor is stopped, the only refrigerant that can flow to the evaporator is the main condenser, reducing the heat load. Since the auxiliary condenser is connected via the discharge pipe, the heat dissipation area is large, improving heat dissipation cooling, and there is no need to install high and low pressure valves in the system piping in the existing refrigeration system. The incorporation is extremely important in the song.

DESCRIPTION OF EMBODIMENTS The present invention will be explained below with reference to FIGS. 2 and 3 showing embodiments. Incidentally, in order to avoid duplication of explanation, the same parts as in the conventional example are given the same numerals and their explanation will be omitted.

Reference numeral 26 denotes an inner cooler pipe partially immersed in the oil 13 of the high-pressure container 2, and a high-pressure valve 27 is disposed inside the high-pressure container 2, deviating toward the outlet side of the inner cooler pipe. Although the configuration of the high pressure valve 2 itself is not the gist of the present invention, as an example, as shown in FIG. A high-pressure valve 27 is constituted by a high-pressure ball valve 30 fixed to a kite cylinder 29, a valve seat 31, and a bias hook 32, and the high-pressure valve 27 is closed by the force of the brace 32 during stoppage. Reference numeral 33 is a driven ball valve located below the high-pressure ball valve 3o and having a larger diameter than the high-pressure ball valve 3o. High pressure ball valve 3 acting below the kite cylinder 29
0 from the valve seat 31, and the drive ball valve 33 keeps the control valve seat 35 closed, thereby keeping the high pressure ball valve 10 open. 3
6 is an auxiliary condenser connected between the discharge pipe 18 and the inlet of the inner cooler pipe 26, and the outlet of the inner cooler pipe 26 on which the drain pipe 21 is mounted is connected to the inlet of the main condenser 24. .

In this configuration, during operation of the rotary compressor 1, the compressed waste d1 in the compression chamber 8, the discharge tube 14, the high pressure container 2, the discharge head 18, the auxiliary condenser 36, the inner cooler pipe 26, and the high pressure valve in an open state are 27, the main condenser 24, the pressure reducer 26, the evaporator 16, the suction pipe 15, and the open low pressure valve 17 to perform a cooling effect.

-l When the rotary compressor 1 is stopped, the drive ball valve 3
3 is separated from the control valve seat 36, and the high pressure ball valve 30 is pressed against the valve seat 31 by the force of the bias spring 32, thereby closing the high pressure valve 27.

Therefore, the only heat loss to the evaporator 16 is to the refrigerant in the main condenser 24. Rotary compressor 1 is also stopped.
For example, since it is connected to the auxiliary condenser 36 via the discharge pipe 18, the heat dissipation area is increased compared to the case where only the high pressure vessel 2 is used, and the heat dissipation cooling effect is increased.

Effects of the Invention With the above-described configuration, the present invention can be incorporated into an existing cooling system, etc., and can prevent the refrigerant in the auxiliary condenser from flowing into the evaporator while the rotary compressor is stopped. Even in rotary compressors of It is.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a refrigeration apparatus including a sectional view of a conventional example from a port with a fluid control function to a tally compressor, and FIG. 2 is a system diagram of a refrigeration apparatus illustrating an embodiment of the present invention. I1JfiJ+ηexistence 51:rr/ノ'shi, zohu-2 chopsticks or 1Q...Rotary piston, 6...
Cylinder, 11...Crankshaft, 3...
Electric motor, 2... High pressure container, 15...
Suction pipe, 17...Low pressure valve, 26...
Inner cooler pipe, 27...High pressure valve, 1
8...Discharge pipe, 36...Auxiliary condenser,
2S... pressure reducer, 24... main condenser,
16... Evaporator.

Claims (1)

[Claims] A cylinder that rotatably houses a rotary piston;
A high-pressure container that houses a crankshaft connected to the rotary piston and driven by an electric motor, a low-pressure valve that acts as a check valve provided on a suction pipe disposed inside the high-pressure container, and an inner cooler pipe. a rotary compressor with a fluid control function, which is provided with a high-pressure valve that closes when stopped, and a discharge pipe; an auxiliary condenser connected between the discharge pipe and the inner cooler pipe inlet;
A refrigeration system comprising a rotary compressor with a fluid control function, including a main condenser connected between an outlet of the inner cooler pipe and a pressure reducer, and an evaporator connected between the pressure reducer and the suction pipe.