JPS5862471A - 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 using a rotary compressor, and is intended to save energy.

Rotary compressors are widely used in room air conditioners in Japan because of their high efficiency and small size. On the other hand, for small compressors such as household refrigerators, reciprocating compressors have traditionally been more efficient in terms of processing accuracy, but with recent improvements in processing and design technology, rotary compressors have become more efficient even in small compressors. It has become highly efficient. However, although a calorimeter test of a rotary compressor alone showed an efficiency improvement of about 20% compared to a reciprocating type, when it was actually installed in a household refrigerator, Tl5C
The effect measured in the power consumption test of the 9607 electric refrigerator and electric freezer was reduced by half, to about a 10% reduction in power consumption at most. The reason for this is that, according to research conducted by the present inventors, excessive superheat gas that remains in large quantities flows into the evaporator, heats the evaporator, and becomes a heat load on the refrigerator. The flow has two paths.The first circuit is a thread path where the superheat gas flows into the cylinder chamber through the mechanical seal of the compression element, and flows into the evaporator via the suction line, and the second circuit is from the airtight container. In this circuit, the gas flows to the condenser, radiates heat through the condenser, becomes room-temperature superheated gas, and flows into the evaporator via the capillary tube.

The superheat gas has a large influence on the first circuit, which has a high degree of superheating. A common solution to this problem is to use a check valve for the first circuit, and a solenoid valve for the second circuit to respond to the shutdown of the compressor. However, this method has disadvantages such as the solenoid valve is expensive, consumes electric power, has a complicated electric circuit, and generates operating noise.

In view of the above-mentioned drawbacks, the present invention aims to provide an energy-saving refrigeration system that is inexpensive, does not require electrical control, is quiet, and can achieve higher efficiency than a single compressor. be.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 is a rotary compressor with a sealed container 2
, a compression element 3, and an electric element (not shown).

This rotary compressor 1 is not equipped with a low-pressure check valve, and the refrigeration system is equipped with a rotor IJ-Funpressor 1. The capacitor 41 first capillary cheep 5a, the inlet circuit 6a of the fluid side valve 6 which is the main part of the present invention, the second capillary tube 6b, the evaporator end, the outlet circuit 6b of the fluid control valve 6, Suction line 8. The compressor 1 is sequentially connected in an annular manner. The fluid control valve 6 has an inlet side casing 9 and an outlet side casing 10, and an outer shell 11.
form and maintain airtightness.

Inside the outer shell 11, a plunger 13 is provided in the communication path 12 between the inlet circuit 6a and the outlet circuit 6b, and a plunger 13 is provided in which the inner diameter of the communication path is approximately the same as the outer diameter. It is equipped with a sliding mechanism. A retainer is provided below the plunger 13 to prevent excessive movement of the plunger 13.
14, and a hole 14a smaller than the plunger 13 is provided at approximately the center of the retainer 14 which contacts the granger 13. A recess is formed in the plunger 13 on the side of the replenisher 14, and a spring 13a having a force of around 1000 in the direction of pushing up the plunger 13 is installed inside the recess. Further, a sealing material 13b is fixedly installed on the circumferential end of the plunger 13 on the side of the replenisher 14, and when the plunger 13 is pushed down, it is pressed against the surface of the replenisher 14, and the inlet circuit 6a and the outlet circuit 6b are connected to each other. is completely blocked.

On the other hand, the inlet side casing 9 has an inlet pipe 9a and an outlet pipe 9b.
and has a valve seat 9 which is sealed by a ball valve 16 approximately at the center shaft.
It forms C. Further, the ball valve 15 is fixed to the tip of the plunger 13 and forms an inlet side valve device 16. Furthermore, the inlet pipe 10 is also connected to the outlet side casing 1o.
a and an outlet pipe 10b, and a tapered valve chamber 10c which accommodates a ball valve 17 in a slider 6, - . A device 18 is formed.

Next, we will discuss the effect. FIG. 1 shows a state in which both the inlet side valve device 16 and the outlet side valve device 18 are closed, that is, the operation is stopped.

When the refrigeration system is operated in this state, the inlet side valve device 16
is closed, the first capillary Q-Proa
does not function as a normal pressure reducing device and becomes a mere communication pipe, so the inside of the inlet circuit 6a is the same 3 ky as the condenser 4.
/crlG or more.

At this time, since the inside of the outlet circuit eb is at a low pressure of 1 ky/crlG or less, the pressure of the inlet circuit 8a>the outlet circuit 6b
Due to the pressure difference, the plunger 13 moves toward the outlet circuit eb side, is pressed against the retainer 14, and the sealing material 13b connects the inlet circuit 6a and the outlet circuit 6.
b is completely blocked. Since the ball valve 16 is integrated with the plunger 13, it is separated from the valve seat 9C, and the inlet side valve device 16 is in an open state. On the other hand, since the ball valve 17 of the outlet side valve device 18 is raised and the valve seat 10d is separated from the ball valve 17, the outlet side valve device 18 is in an open state. At this time,
Since the valve chamber 1oC of the outlet circuit 6b is formed in a tapered shape with a smaller diameter on the valve seat 10d side, the ball valve 17 and the valve seat 10
Since a refrigerant flow path is formed even when the valve seat 10d is slightly separated from the valve seat 10d, the flow of the refrigerant is ensured, and this gas flow further blows up the ball valve 17, increasing the distance from the valve seat 10d, thereby preventing the refrigerant flow. Since the passages are sufficiently formed, the serious disadvantage of pressure loss found in conventional check valves can be eliminated. Therefore, the refrigerant gas discharged from the rotary compressor 1 flows through the condenser 4, the first capillary tube 5a, the inlet circuit 6a of the fluid control valve 6, and the second capillary tube 5b.

Exit circuit eb of the evaporator γ and the fluid control valve 6.

Suction line 8. It flows without any hindrance to the rotary compressor 1 and performs the refrigeration action.

In other words, the state shown in FIG. 2 is reached. At this time, the inlet circuit 6
A and the outlet circuit 6b are completely shut off by a sealing material installed on the refiller 14 side of the plunger 13, so refrigerant will not leak from the high pressure inlet circuit 6a to the low pressure outlet circuit 6b. In addition, since the pressure in the inlet circuit 6a is higher than the combined pressure of both the refrigerant pressure and the spring force in the outlet circuit 6b, the inlet side valve device 16 is maintained in an open state, and the inlet side valve device 16 is maintained in an open state while the rotary compressor 1 is in operation. The side valve device 16 is never closed.

Next, a transition state from the above operating state to a stopped state will be explained. When the rotary compressor 1 stops, the gas flow from the evaporator 7 stops, so the ball valve 17 in the outlet circuit 6b of the fluid control valve 6 falls under its own weight. The side valve device 18 is brought into a closed state.

Thereafter, the superheated gas in the closed container 2 flows into the cylinder chamber (not shown) of the compression element 3, and further flows into the suction line 8.
through which it flows into the outlet circuit 6b of the fluid control valve 6. At this time, since the outlet side valve device 18 is in a closed state, superheated gas does not flow into the evaporator 7. Therefore, the pressure in the outlet circuit 6b rises rapidly. At this time, the pressure in the inlet circuit 6a is considerably lower than that in the outlet circuit 6b. That is, after stopping, the liquid refrigerant in the condenser 4 gradually flows in through the first cavity tube 5a to increase the pressure, but the resistance of the first cavity tube 6a is
Since the resistance is greater than the resistance when the superheated gas leaks out from the cylinder chamber (not shown) of the compression element 3 into the suction line 8, the pressure in the outlet circuit 6b increases rapidly, whereas the pressure in the inlet circuit 6a increases. It increases gradually.

Therefore, several seconds after the stop, the pressure of the gas in the outlet circuit 6b plus the force of the spring 13a becomes considerably higher than the pressure in the inlet circuit 6a, and this pressure difference causes the plunger to
3 is moved to the inlet circuit 6a side, and by pressing the ball valve 15 against the valve seat 9C, the inlet side valve device 16 is brought into a closed state. This prevents superheated gas in the condenser 4 from flowing into the evaporator 7. Thereafter, the pressure in the inlet circuit 6a gradually increases, and after a few minutes it reaches the same pressure as the pressure in the outlet circuit 6b, but the force of the spring 13a increases the plunger 1.
3 is working in the direction of pushing up the inlet side valve device 16.
never becomes an open circuit.

As described above, when the rotary compressor 1 stops, the outlet side valve device 18 and the inlet side valve device 16 of the fluid system valve 6
are closed almost simultaneously to prevent superheat gas from flowing into the evaporator 7.

In this way, the present invention provides a rotary compressor.

It consists of a condenser, a first cavillary cheep, a second capillary tube, an evaporator, a suction line, a fluid control valve, etc., and the fluid control valve has an inlet side including a large mouth valve, a plunger, a spring, a sealing material, and an inlet circuit. a valve device and an outlet side valve device including an outlet valve and an outlet circuit, the inlet side valve device being between the first capillary chest and the second capillary tube, and the outlet side valve device being connected between the evaporator and the rotary tube. The compressors are connected through each other, and the inlet side valve device is opened by the pressure difference between the first capillary tube outlet side pressure and the evaporator outlet side, and the inlet circuit and the outlet circuit are connected by the coil material. When the pressure difference is reversed, the inlet side valve device is closed and the closed state is maintained by the spring, and the outlet side valve device operates as a check valve, so the pressure in the inlet circuit is When the side valve device is closed, the pressure is high, and when it is open, it is medium pressure, so the change is very large, and the outlet circuit is connected to the suction line of a rotary congresor that does not have a check pulp. While the refrigeration system is in operation, the pressure is low, and when the refrigeration system is stopped, the pressure rises rapidly and becomes high pressure. In this way, since the inlet side valve device slides on the guide part that communicates the inlet circuit and the outlet circuit, the change in pressure before and after and the operation and stop of the refrigeration equipment are completely synchronized, and the pressure Since the amount of change is extremely large, reliable operation is possible, and since the inlet valve is forcibly closed by the spring, it is possible to completely prevent superheat scum in the closed container and condenser from flowing into the evaporator. Therefore, a large power saving effect can be obtained compared to one without a fluid control valve. or,
During operation, the inlet circuit and the outlet circuit are completely shut off by the sealing material, so refrigeration in the inlet circuit will not leak into the outlet circuit. Therefore, it has a simpler structure than conventional solenoid valves, and since it does not require electricity to operate, there is no need to use extra electricity.
Numerous effects such as no need for lightning or air wiring can be obtained by adding a fluid control valve with a very simple structure.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a refrigeration system showing an embodiment of the present invention when it is stopped, and FIG. 2 is a circuit diagram of the refrigeration system when it is in operation. 1...10-Tally Comprennosa, 4@...-
Capacitor, 5a...first capillary tube, 6b...second capillary tube, 7.
...Evaporator, 8...Suction line, 15...Inlet valve C ball valve), 6a...
...Inlet circuit, 17... Outlet valve (ball valve), 6b... Outlet circuit, 13a... - Spring, 13b... 11. Seal material. Name of agent: Patent attorney Toshio Nakao and one other person lA
Figure 1 Figure 2

Claims (1)

[Claims] rotary compressor, condenser, first capillary tube, second capillary tube evaporator,
The fluid control valve consists of an inlet side valve device including a large mouth valve, a plunger spring, a sealing material, and an inlet circuit, and an outlet side valve device including an outlet valve and an outlet circuit. The inlet side valve device is provided between the first capillary tube and the second capillary tube, and the outlet side valve device is interposed and connected between the evaporator lake and the rotary compressor, and the inlet side valve device is provided between the first capillary tube and the second capillary tube. The valve device opens due to the pressure difference between the first capillary tube outlet side and the evaporator outlet side, and also cuts off the inlet circuit and the outlet circuit with a sealing material, and when the pressure difference is reversed, the inlet A refrigeration system in which a side valve device is closed and maintained in the closed state by a spring, and the outlet side valve device is operated as a check valve.