JPS5888556A - Refrigerator - 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 The present invention relates to a refrigeration system such as an electric refrigerator, and more particularly to a control device for a refrigeration system designed to reduce energy loss during operation and stop of a refrigeration cycle.

Generally, in a refrigerator or the like, in order to maintain the internal temperature at a predetermined temperature, a certain temperature range is repeatedly operated and stopped. When the temperature inside the refrigerator drops to a predetermined temperature, this temperature is sensed and a signal to stop the cooling operation is issued, causing the electric compressor to stop.
The state of the refrigerant in each part of the IvIl cycle changes in the opposite direction. In other words, in order to maintain a balance pressure between the high pressure side from the discharge valve of the electric compressor to the inside of the shell and the condenser, and the low pressure side from the cooler to the suction boat in the electric compressor, one capillary tube or the slide of the electric compressor is used. Since the pressure gas refrigerant flows from the moving part to the low-pressure side low-temperature part (in this case, the cooler), the cooler is filled with refrigerant. The temperature rises in the cooler due to the heat from the surrounding area, but the temperature rises due to the heat of condensation when the refrigerant flowing into the cooler from the capillary or electric compressor condenses and liquefies.

The temperature often rises rapidly and warms the surrounding air.

For this reason, the temperature inside the refrigerator is sufficient! When the electric pressure machine receives a cooling operation signal and is operated, the liquid refrigerant accumulated in the cooler does not evaporate in the stile reactor, and the pipes connected to the electric pressure machine are connected to the electric pressure machine. In order to cool the refrigerant and flow it to the electric compressor, the refrigerant was not effectively refrigerated for several minutes after starting, resulting in energy loss. When it is sucked into an electric compressor, the compression work increases and the electric motor becomes overloaded, so the input V&GlaC usually increases, and a larger electric MJ machine is inevitably used to deal with this problem. The present invention was made for the purpose of solving the problems in the conventional refrigerant system, and the present invention will be described in detail below with reference to the illustrated embodiment.
Electric compressor C (hereinafter referred to as electric compressor) with a high pressure shell I'9 of a so-called rolling piston 1lal type IIIH), +21μ condenser, (capillary tube at 31).

(4) In a two-stage device, these are sequentially connected to form a securing cycle. (5) is a check valve connected to the piping between the electric compressor (11) and the cooler (4).

(61 is an on-off valve that operates based on the pressure signal, and the condenser (2
) and the capillary tube (3).

(71μ open/close-j'P161i When the pressure between the electric pressure S machine (1) and the check valve (5) is high pressure in the pressure signal tube for operation, the open/close valve (6) is in the t-closed state. The valve is in an open state when the pressure is low.Next, to explain the operation of the securing cycle configured by these, the refrigerant circulates through the securing cycle FF3, and the cooling operation is performed. When the temperature inside the refrigerator drops to a predetermined temperature, a temperature sensor or other device will issue a stop signal and the electric compressor will stop.

When the electric pressure m machine (1) stops, the RFC high temperature and high pressure gas medium resistant, rolling piston 1 is sealed in the high pressure shell.
It flows back toward the cooler (4) through the oil film seals on the sliding surfaces such as la). At this time, a check valve (5) is connected to the piping of the cooler (4) and the electric compressor (1) to prevent backflow from the electric pressure Ml!+11 to the cooler (4). The pipe line was completely blocked instantly, preventing the temperature from rising due to the high-pressure gas refrigerant in the cooler (4), and at the same time, during operation, the pressure between the electric compressor a! Check 9f Te on the open/close valve (6) which was in the open state
+ is closed and the check valve (51 and electric pressure machine il +
The piping between 8μ and high pressure gas is reverse flowed, and the pressure signal pipe connected to the relevant part is opened and closed. cut off the flow. In the system shown in Figure 2, the balance state of the high pressure curve (a) and low pressure curve (b) in the conventional LV freeze cycle is on the high pressure side due to the change in pressure when a refrigerant cycle stop signal is issued by a temperature sensor etc. Condenser (2)
The gas refrigerant that has passed through the capillary tube (31) and is further sealed in the high-pressure shell leaks from the sliding surface of the rolling piston 11a1, etc., and the refrigerant gradually flows out into the so-called cooler 141 on the low-pressure side. Because the balance point was (2)
However, in the embodiment according to the present invention, the internal pressure (
a') The pressure on the high pressure side (2) exhibits a higher pressure state than the conventional high pressure side pressure, and gradually stabilizes at the saturation pressure, which is the same as the outside temperature.

10,000, the low pressure side pressure from the cooling pipe (4) to the check valve (5) installed in the piping path of the electric compressor (1)! /)to
,.

There is no longer any refrigerant intrusion from the high pressure side, and the refrigerant trapped on the low pressure side flows into the cooler (4) part where the temperature has dropped the most immediately after stopping, and is affected by heat from the surroundings of the pipes and the cooler (4). When the signal to start the 9th decompression operation is issued, the electric compressor 111 rises little by little until it starts, and the pressure on the low pressure side is extremely high, similar to the pressure on the high pressure side when it is stopped. It is possible to maintain the pressure state close to that during normal operation. Furthermore, the high-pressure gas in the shell of the electric compressor (1) is transferred to the rolling piston (1a) of the electric compressor fl+, which has a high-pressure shell of the rolling piston (1a) type, which is one embodiment of the present invention, at the same time as the electric compressor (1) is stopped.
etc.The sliding surface machined non-return *+5+ rotates in the direction, passes through the oil film seal on the sliding surface by the force of the differential pressure, and flows backward, operating the check valve (5) and at the same time electric compression 4! ! 111 and back check* (5
It changes as shown in the ta pressure curve (a) for 1 hour, and the front and back of the electric pressure miso 11+ can be balanced with i% pressure.

Next, when the signal to start story operation is transmitted to the temperature sensor etc., the electric compressor @ (1) also starts operation at the same time, and the electric compressor (110) The gas is sucked into a low pressure state, and the pressure signal tube (7) at the contact part
The opening/closing switch 9P161 is opened, and the circulation of the yeast from the condenser (2) to the cooler 41 is started. Conventionally, the liquid refrigerant that had accumulated in the cooler (4) during the stoppage was transferred to the IV cooler (4).
4) Don't let everything cool down at all! However, in the present invention, the normal temperature sieve pressure medium accumulated in a liquefied state in the condenser (21) is returned to the electric compressor (fi+) and causes a pressure increase. Capillary a tube (3
1, the entire flow is depressurized, the cooler (4) evaporates and performs a cooling action, and then returns to the electric compressor ill as a gaseous refrigerant, which is input by reducing the load at the time of starting the electric compressor +11. This makes it possible to reduce the total size of the conventional WIL motor.

Since the present invention is constructed as described above, it is possible to eliminate energy loss, which is the main cause of movement of refrigerant in a conventional refrigeration cycle, especially immediately after operation and stoppage of the refrigeration cycle, in an extremely simple manner, and The motor of the electric compressor can be completely hand-carved, making it possible to increase energy efficiency even during normal operation.

I! Figure 1a Diagram j, ibI for the embodiments of the present invention! refrigeration circuit diagram,
FIG. 2 is an explanatory diagram showing the pressure balance state after the refrigeration cycle is stopped in the refrigeration cycle of the present invention and the conventional refrigeration cycle.

(1) is an electric compressor, (2) is a condenser, and a +31H capillary.

141 is a cooler, (51 is a check valve, (6) is an on-off valve, (
71 is a pressure signal tube.

Agent Shin Kuzuno

Claims (1)

[Claims] In a refrigeration cycle in which an electric compressor with a high pressure inside the shell, a condenser, a capillary tube, and a cooler are successively installed, a check 9 is installed in a part of the piping connecting the electric compressor and the cooler.
A refrigeration system characterized by providing an opening/closing point 5P near the connection between the condenser and the capillary, which is operated by air in response to a pressure change between the electric compressor and the check valve due to operation/stopping of the refrigeration system. .