JPS5932754A - Refrigerator with electromagnetic vibration type compressor - 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 a refrigeration system including an electromagnetic oscillating compressor, and particularly to its discharge pressure regulating valve and release circuit.

The structure of the conventional example and its problem
As No. 2879, a discharge gas pressure regulating valve is installed in the high pressure side piping, and is opened when the discharge gas pressure reaches a predetermined pressure difference from the atmospheric pressure.
1-We have already applied for a device that eliminates the decrease in loaf, but this discharge gas pressure regulating valve operates based on atmospheric pressure, so the discharge gas pressure is always constant, but the pressure on the low pressure side in the closed container is affected by low outside temperatures. As a result, as the outside temperature decreases, the pressure difference between the discharge gas pressure and the low-pressure side pressure tends to increase. Therefore, the piston 1-loaf cannot maintain a constant value at even lower outside temperatures. thickened,
For example, if the temperature is too low at 0°C + 5°C,
-It turned out to be Rourke.

Purpose of the Invention The present invention lowers the pressure on the low pressure side at low outside temperatures, for example, 0°C.
The purpose is to suppress excessive stroke of the piston at extremely low outside temperatures such as , 5°C, etc.

Structure of the Invention In order to achieve this object, a discharge gas pressure regulating valve is disposed on the upstream side of the condenser, and a release valve is provided that connects the flow side of the discharge gas pressure regulating force and the downstream side of the pressure reducing device. A release circuit is provided, and the release circuit prevents an unnecessary drop in the pressure on the low pressure side when the outside temperature is low, thereby preventing an excessive stroke.

Description of examples An embodiment of the present invention will be described with reference to the drawings.

1 is an electromagnetic vibration compressor, 2 is a discharge pressure regulator (hereinafter simply referred to as two valves), 3 is a condenser, 4 is a pressure reducing device such as a capillary tube, and 5 is an evaporator, which are connected in order in a ring. This constitutes a refrigeration cycle. B is a release circuit, B1 is a release inlet line, which is disposed between the discharge line A and the release valve p2B (hereinafter referred to as 1-simply valve 2B), and B21f is the release line, which is connected to the suction line C and the release line. It is arranged between valves 2B.

The valve 2A has an outer shell 6 made up of two substantially cup-shaped cases 6a and eb, and the inside of the outer shell 6 is airtightly divided into an upper chamber 8 and a lower chamber 9 by a diaphragm 7.

10 is an input D for introducing the discharge gas of the compressor 1 into the lower chamber 9;
Pipe 11 is an output pipe. Reference numeral 12 indicates a ball valve 12&, which is fixed to the substantially lower surface of the diaphragm 7, and an outlet [1].
This is a valve body consisting of a valve seat 12b connected to the pipe 11. On the other hand, in the upper chamber 8 there is a holder 13 provided on the diaphragm.
The coil spring 14 is attached to the coil spring 14 through the coil spring 14. The second end of the coil spring 14 is an adjustment cap 1 with a threaded portion 15zL.
5 is screwed into the case ea, and a communication hole 15b is provided in the center of the trench to communicate the chamber 8 with the outside air.

Therefore, the upper chamber 8 side of the diaphragm 7 is loaded with both atmospheric pressure and the biasing force of the coil spring 14. Valve 2B
is almost the same as the two valves, but an adjustment cap 17 with a threaded part 16 is screwed into the case 18.
After adjusting the valve setting pressure, it is welded 20 to the outer shell 19 to maintain airtightness from the atmosphere. Further, a communication hole 22 is provided in the center of the adjustment cap 17 to communicate the lower chamber 21 with the inside of the suction line C. Therefore, the lower chamber 21 side of the diaphragm 23 is loaded with both the low pressure in the suction line C and the biasing force of the coil spring 24. B3 is a communication pipe connecting the communication hole 22 and the suction line C.

Although the structure of the vibratory compressor itself is not the gist of the present invention, the structure of a typical compressor 1 will be briefly described. 1a is a piston that slides within the cylinder 1b, and this screw 1-
Although not shown in the drawings, 71a is equipped with a suction passage and a suction pipe. 1C is a fixed iron core having a winding, and 1d is a piston 1a.
1e is a resonance spring, 1f is a pulp plate, 1q is a discharge valve that opens when the pressure inside the cylinder 1b exceeds a predetermined value, 1h is a cylinder head, 11 is a discharge pipe, 1) is a suction pipe. be. As is well known, this compressor 1 is energized by the windings of the fixed core by the magnetic variable resistance principle to attract the movable V and the core, and then the resonant spring 1e
It is repelled by the energy stored in it, and it vibrates as a result of this repetition.

Next, the operation of the above configuration will be explained.

The gas discharged from the compressor 1 is passed through the inlet vibrator 10 to the valve 2.
It flows into the lower chamber 9 which is divided into upper and lower parts by the diaphragm 7 of A. At this time, the valve body 12 is closed. Therefore, the pressure in the lower chamber 9 is increased. Since the lower chamber 9 is much smaller than the capacitor 3, the pressure is instantly increased. As a result, the lower chamber 9
The pressure of the artificial vibrator 10 is the pressure of the diaphragm 7.
R (Jl For example, when the pressure of the inlet vibrator 10 reaches a pressure of 12 K9/car Cr, the diaphragm is raised to 74ζ.
- The valve 12& is separated from the valve seat 12b, that is, the valve 12 is opened to allow gas to flow into the condenser 3, and the refrigerant is circulated through the pressure reducer 4 and the evaporator 5 to form a refrigeration cycle.

Figure 2 shows the pressure in condenser 3 and the input voltage in a steady state.
This shows the relationship between the pressures in the pipe 10. When the pressure of the condenser 3 is lower than the operating pressure of the two valves, 12 kg/C, -jr2 is in a half-open state and due to its throttling action,
The pressure of the input pipe 8 is approximately 12 of the operating II force of the valve 12.
9/c4G, and under 12Kf/cyJG -1-, no 1 body 12 is completely open circuit and condenser 30 force and human 1
-1 The pressures of the pipes 10 are approximately equal at 3°.Next, the release action will be explained.

= The pressure of Indenza 3 is the operating pressure of valve 2 12 KV2
When lower than mG, the pressure in the upper chamber 25 of the valve 2B is 12Ky.
, /caG is constant and acts as a force pushing down the diaphragm 23 of the valve 2B, and the diaphragm J・2 of the valve 2B
Koino 1 pushing up 3/force of spring 24 and communication hole 2
The low pressure side L in the suction line C which is applied to the lower part of the diaphragm 23 through 2 "-The sum of the forces is 12? / CT
For example, when the pressure on the low pressure side in the suction line C becomes below OK9/ca G, the valve 2B opens and the high and low pressures are released. When the condenser 3 pressure is 2 to 9/ca Cr or more, the pressure in the blade chamber 25 is equal to the pressure in the blade chamber 25, and the low pressure side pressure is (condenser F tocar' 2 Ky/cA).
When (r) or less, the valve 2B opens and the high and low pressures are released.

The above action will be explained from the viewpoint of actual operation of a refrigerator (freezer) as follows.

Come when the outside temperature is low (for example, outside temperature 15°C),
When the compressor 1 starts operating, both the valve 2B and the valve 2B are initially closed, and the pressure in the inlet vibrator 10 and the release line B1 is instantaneously K12K9/c.
The pressure in the inlet vibrator 10 and the release inlet line B1 is maintained at 12 kg/cacr, and the pressure in the condenser 3 is the same as that of the refrigerant corresponding to the outside temperature of 15°C. Condensation pressure about 5-6
K9/cA G is retained and constitutes cryocycles. At this time, the pressure in the communication hole 22 of -ji'2B, that is, the low pressure side pressure in the suction line C, decreases with time,
When OKg / cA 7 is reached, valve 2B opens, but the same throttling action as valve 2A works and the low pressure side pressure in suction line C is maintained at OKy / cA (,
Due to the presence of valve 2B, the valve operating pressure of the two valves can be set high, and the difference between the discharge pressure and suction pressure at low outside temperatures remains constant (Figure 2), and the resonance frequency remains constant. (Figure 3). As a result, the Pistons 1-
Roque can be improved in a stable state (Fig. 4), and the refrigerating capacity can be improved. Please, release circuit B prevents the low pressure from becoming below OKq/ca G14
- If possible, the pressure difference between high and low pressure can be kept below the standard value, so the operating pressure of the two valves is set high (12K
y/c4G), and the refrigerating capacity can be increased by increasing the pressure on the high pressure side.

Effect of the invention The present invention relates to an electromagnetic vibration compressor as described above.

A release circuit including a condenser, a pressure reducer, an evaporator, a discharge pressure regulating device disposed upstream of the pressure reducer, and a release valve connecting the upstream side of the discharge pressure regulating valve described in iJ and the downstream side of the pressure reducing valve. The release circuit suppresses unnecessary drops in the pressure on the low pressure side when the outside temperature is low, and the difference between the high pressure side pressure and the low pressure side pressure can be maintained at a constant value. In addition to preventing this, the operating pressure of the discharge pressure regulating valve can be increased, and the refrigeration capacity can be improved.

[Brief explanation of drawings]

FIG. 1 is a refrigeration system diagram including a partially enlarged sectional view of a refrigeration system equipped with a vibrating compressor showing one embodiment of the present invention;
Figures 3 and 4 are diagrams showing the relationships between the outside air temperature, the low pressure side pressure, the discharge pressure, the resonance frequency, and the screws 1, 1, and 1, respectively. 1... Electromagnetic vibration compressor, 1k... Airtight container, 3... Condenser, 4... Pressure reducer, 5... Co- 7 (Voleta, 2 people...
・Discharge pressure adjustment valve, 2B...Release valve, B・
...Release circuit. Name of agent - JT Physician Toshio Nakao and 1 other person Figure 1 @ Figure 2 Guruki 5jikentochi (C) 3rd diagram 1;

Claims (1)

[Claims] An electromagnetic vibration compressor, a condenser, a pressure reducer, an evaporator, a discharge pressure regulating valve disposed upstream of the pressure reducer, and a relief valve f connecting the upstream side of the discharge pressure regulating valve and the downstream side of the pressure reducing valve. The discharge pressure regulating valve operates based on the pressure difference between the discharge gas pressure and atmospheric pressure, and the release valve operates based on the pressure difference between the discharge gas pressure and the low pressure side pressure. Equipped with refrigeration equipment.