JPS60142164A - 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 Field of Industrial Application The present invention relates to refrigeration equipment used in home refrigerators, freezers, ice makers, air conditioners, etc. Structure of conventional example and problems thereof Structure of conventional example will be explained with reference to FIG.

In the figure, 1 is a rotary core with a fluid control function.
As is well known, an electric motor 3 including a stator 3a and a rotor 3b is press-fitted into the high-pressure vessel 2. Further, a compression element 9 is housed in which a compression chamber 8 is formed by overlapping a side plate 6, a cylinder 6, and a side grate 7 fixed by welding 4. 1o is a rotary piston mounted on the eccentric portion 11a of the crankshaft 11 in the cylinder 7, and 12 is an oil pump that sends oil 13 to the rotating sliding portion. 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 pulp (not shown); 16 is a discharge tube that directs the gas from the evaporator 16 to the compression chamber 8; A low-pressure pulp 17 that acts as a check valve is interposed in the portion of the suction pipe located inside the high-pressure container 2.

This low-pressure pulp 17 has an inlet portion 17a, a valve seat 17b, and a disc-shaped general disc valve 17 having a plurality of notches on the outer periphery.
c, a stopper 17d that regulates the lift amount of the disc valve 17c, and an outlet portion 17e.

A first discharge pipe 18 is equipped with a high-pressure pulp 19 that uses, for example, an electromagnetic type or gas pressure.

On the other hand, as a refrigeration system, for example, in the case of a general refrigerator system, reference numeral 20 is an auxiliary condenser into which high-temperature and high-pressure refrigerant gas flows first from the first discharge pipe 18, and when the evaporator 16 is defrosted. A drain pan 21 for evaporating the defrosting water is placed. 22 is a dry pipe arranged at the edge of the opening inside the refrigerator; 23 is a condenser; the dry pipe 22. The condenser 23 constitutes 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 then auxiliary via the high-pressure pulp 19 that is opened during operation. Condenser 20. Main condenser 24. A pressure reducer.

The evaporator 16 and the refrigerant flow. Then, the disk valve 17c of the low-pressure pulp 17 in the suction pipe 15 is blown up and opened by the flow energy, and the pulp returns to the compression chamber 8 to 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 is compressed by the compression element 8.
The oil seal that separates the high and low pressures is broken, 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 disc valve 17c in the low-pressure pulp 17 has already closed the valve seat 17b due to its own weight. The pressure inside the high-pressure vessel 2 during stoppage is maintained at a state slightly lower than the pressure during operation.

That is, while the rotary compressor 1 is stopped, the high-pressure high-temperature gas in the high-pressure vessel 2 is confined within the rotary compressor 1.

Therefore, the losses during the stop to the evaporator 16 are auxiliary,
There are still drawbacks caused by the refrigerant in the main condenser 20, 24 flowing into the evaporator 16. On the other hand, in order to further reduce these losses during shutdown, it is necessary to A method has been proposed that uses a solenoid valve or fluid pressure change to prevent high-temperature refrigerant from flowing into the evaporator 16 while the rotary compressor 1 is stopped. The problem is that the piping structure is complicated, and it cannot be simply incorporated into existing systems such as refrigerators or showcases or refrigeration equipment with electrical connections as a general-purpose rotary compressor.

On the other hand, although not shown in the drawings, it is well known that rotary compressors generally experience a large temperature rise, and that an auxiliary condenser called a precooler is used for cooling the rotary compressor. In such cases, an auxiliary condenser is required, and if such a system simply incorporates a conventional rotary compressor with high and low pressure pulp, the refrigerant in the auxiliary condenser evaporates while the rotary compressor is stopped. There was a problem that it flowed into the container and promoted 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 existing cooling systems, 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, the rotary compressor is provided with an auxiliary condenser, and the rotary compressor is connected to the second discharge pipe, which is a conduit for the refrigerant that returns from the auxiliary condenser to the high-pressure vessel and exits again to the main condenser. A high-pressure pulp that closes when the breather is stopped is provided, and an auxiliary condenser is connected between the first discharge pipe and the return pipe that directs the compressed gas from the cylinder to the outside of the high-pressure container, and the second discharge pipe and the main condenser are connected to each other. As a result, when the rotary compressor is stopped, the only refrigerant flowing to the evaporator is the main condenser, reducing the heat load, and the auxiliary condenser returns to the first discharge pipe even when the rotary compressor is stopped. Since it is connected via a 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 an existing refrigeration system, making it extremely easy to integrate. It is something.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

Incidentally, in order to avoid duplication of explanation, the same parts as in the conventional example are labeled with the same blades, and the explanation thereof will be omitted.

A first discharge pipe 26 is directly connected to the discharge tube 14, unlike the conventional example. 26' is in the space of the high pressure vessel 2,
Although the structure of the high-pressure pulp I located in this space is not the gist of the present invention, as an example, as shown in FIG. A high-pressure Borl valve 30 having an outlet portion 28b and fixed to the guide cylinder 29, and a valve seat 31. The high-pressure pulp 27 is configured by the bias spring 32, and the high-pressure pulp is closed during the stop due to the force of the bias spring 3203
3 is a driven ball valve located below the high-pressure ball valve 30 and having a larger diameter than the high-pressure ball valve 30. During operation of the rotary compressor 1, the pressure inside the suction pipe 15 is transferred to the lower side of the guide cylinder 29 via the control pipe 34. High pressure ball valve 30
is pulled away from the valve seat 31 and the drive ball valve 3
3, the control valve seat 36 is kept closed, and as a result, the high pressure ball valve 3o is kept open.
This is an auxiliary condenser connected between 7 and 7, on which a drain pan 21 is placed. The outlet of the second discharge pipe 2d is connected to the inlet of the main condenser 240.

In this configuration, while the rotary compressor 1 is in operation, the gas compressed in the compression chamber 8 flows through the first discharge pipe 26.
．． Auxiliary condenser 36. Modo υ tube 37° high pressure vessel 2 internal space,
High-pressure pulp 27° high-pressure container in open circuit state2. Second discharge pipe 2
6', main condenser 24. Pressure reducer 25. Evaporator 16. Suction pipe 16. It flows through the low-pressure valve 17 in the open state and has a cooling effect.

On the other hand, 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 pulp 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.
is the auxiliary condenser 36, the first discharge pipe Z and the 9th pipe 37.
Since the high-pressure vessel 2 is connected via the high-pressure vessel 2, the heat dissipation area is increased and the heat dissipation cooling effect is increased.

Effects of the Invention With the above-described configuration, the present invention can be simply incorporated into an existing cooling system, and the refrigerant in the auxiliary condenser can be prevented from flowing into the evaporator while the rotary compressor is stopped. The rotary compressor can also reduce heat loss during shutdown in the refrigeration system.

Furthermore, even when the rotary compressor is stopped, the auxiliary condenser can contribute to cooling and heat radiation, so that the cooling effect is not hindered.

[Brief explanation of the drawing]

FIG. 1 shows a refrigeration system including a sectional view of a conventional rotary compressor with a fluid control function.
---Rotary piston, 6------- cylinder,
11------Crankshaft, 3------Electric motor, 2... High pressure container, 16... Suction pipe, 170-・e・Low pressure valve, 27・...High pressure valve, 26...First discharge pipe, 2d...
Second discharge pipe, 36...1111・Auxiliary condenser, 37・
...Return pipe, 26...Reducer, 24.
...Main condenser, 16...Evaporator. Name of agent: Patent attorney Toshio Nakao Haga 1st person
1111 Figure 2 (

Claims (1)

[Claims] A high-pressure container housing a cylinder rotatably containing a rotary piston and a crankshaft connected to the rotary piston and driven by an electric motor; A second valve is equipped with a low-pressure pulp that acts as a stop valve and a high-pressure pulp that closes the circuit when the valve is stopped.
a fluid-controlled rotary congressor having a discharge pipe, a first discharge pipe for directly guiding gas from the cylinder to the outside of the high-pressure vessel, and a return pipe that further opens into the high-pressure vessel space; an auxiliary condenser connected between the pipe and the return pipe; a main condenser connected between the second discharge pipe and the pressure reducer; and a main condenser connected between the pressure reducer and the suction pipe. Refrigeration equipment equipped with a rotary compressor with fluid control function and an evaporator.