JPS6030961A - 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] [Field of Application of the Invention] The present invention relates to a refrigeration system in which a refrigerant control valve is provided in the main circuit of a refrigeration cycle, and a pressure balance valve is provided between the high pressure side and the low pressure side of the compressor. be.

[Prior art]

In refrigerators, etc., which are equipped with a conventional refrigeration cycle consisting of a compressor, condenser, pressure reducing device, and evaporator, and in which the compressor is operated intermittently by an automatic temperature controller inside the refrigerator, rotary compressors are used. When the high-pressure side has a large internal volume, hot gas flows into the evaporator from the high-pressure side when the compressor is stopped during intermittent operation, raising the evaporator temperature and increasing power consumption. Therefore, as a preventive measure, a refrigerant control valve, such as a solenoid valve, that is linked to the intermittent operation of the compressor is installed between the high-pressure side and the low-pressure side to prevent hot gas from flowing into the evaporator from the high-pressure side when the compressor is stopped. Pot gas flowing into the evaporator from the high pressure side via the compressor is blocked by a check valve provided between the evaporator and the compressor. In such a refrigeration cycle, if a solenoid valve is used as the refrigerant control valve, the power consumption of the solenoid valve will have a negative effect, and if there is little pot gas leakage from the high pressure side to the low pressure side via the compressor when the compressor is stopped. , The pressure balance between the high-pressure side and the low-pressure side of the compressor was poor (there was a drawback that the load on the compressor increased when the compressor was restarted, and a compressor with a higher starting torque was required).

[Purpose of the invention]

The object of the present invention is to improve the above-mentioned drawbacks, to reduce the amount of fuel consumed, to downsize the compressor, and to simplify the starting device.

[Summary of the invention]

As mentioned above, in the refrigeration cycle of a refrigerator using a rotary compressor, when the compressor is stopped, hot gas is prevented from flowing into the evaporator from the high pressure side, reducing power consumption and further reducing the starting load of the compressor. In order to reduce the weight of the compressor, a differential pressure valve that has both a refrigerant control valve section and a balance valve section is installed as a way to balance the pressure between the high pressure side and low pressure side of the compressor quickly and without consuming electricity. It is.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. 1(
1 is a compressor, 2 is a condenser, 10 is a differential pressure valve, 3 is a pressure reducing device,
4 is an evaporator, and 6 is a check valve, which are connected in sequence to form a refrigeration cycle. The differential pressure valve 10 has a refrigerant control valve part 10b and a balance valve 510c in an integrated container 10a.
is connected to the condenser outlet side 2a, the outlet vibrator 12 of the refrigerant control valve section 10b is connected to the pressure reducing device inlet side 3a, and the inlet vibrator [3] of the balance valve section 10c is connected to the condenser outlet side 2a through a pipe 9. , balance valve part 1. Oc exit vibe 14
is connected to 1a between the check valve 6 of the suction side pipe of the compressor 1 and the compressor 1 through a pipe 8, and the pressure guiding pipe 15 is connected to the discharge side 1bf of the compressor I through a pipe 7.

Next, the principle of operation of the differential pressure valve 1o will be explained with reference to FIG.

The differential pressure valve 1o is divided into a refrigerant control valve section 10b and a balance valve section 10C by a container 10a and a partition plate 16.

A valve 19.2o is semi-fixedly attached to a diaphragm 17.18 in the refrigerant control valve part job and the balance valve part 10G, respectively.

Each is provided with a corresponding valve seat 21,22. These components divide the inside of the differential pressure valve 1o into four chambers. These 4 chambers are the high pressure side of the refrigerant control valve section.The 1 side is the A chamber 23.
The low pressure side is called B chamber 24, the low pressure side of the balance valve part 10c is called C chamber 25, and the high pressure side is called D chamber 26. The A chamber 23 has an inlet vibrator l↑ and an outlet vibrator 12 from the valve seat 21, and the 5B chamber 24
is the low pressure side of the refrigerant control valve section 10b, and the outlet of the balance valve section 10C is open and has an outlet vibrator 14. The C chamber 25 has an inlet vibrator 13, and the D chamber has a pressure guiding pipe 15. The operation of the differential pressure valve 10 is as follows: When the pressure in the A chamber 23 is pa, the pressure in the B chamber 24 is pb, the pressure in the c chamber 25 is PC, and the pressure in the D chamber 26 is pd, the 5 refrigerant control valve section 10b is as follows. When pa > Pb, the valve 19 opens the valve seat 21, and when Pa≦pb, the valve 19 closes the valve seat 21. The balance valve 810c is configured such that the valve 20 closes the valve seat 22 when PC<Pd, and opens the valve seat 22 when PC≦pd.

The operation of one refrigeration cycle provided with the differential pressure valve 10 as described above will be explained below. First, when the entire refrigeration cycle is in a pressure balanced state before starting, the valve seat 21 is closed and the valve seat 22 is closed.
It is in an open state.

When the operation is started from this state, the pressure in the B chamber 24 decreases due to the operation of the compressor 1, and the relationship between pa and pb changes to P.
a>, Pb, the valve seat 21 is opened, and the refrigerant begins to circulate in the condenser 2, resulting in a pressure drop in the condenser 2 and a difference between the discharge side 1b of the compressor 1 and the outlet side 2a of the condenser 2. Can create pressure. As a result, the relationship between the pressure Pd in the D chamber 26 connected to the mouth side 1b of the compressor 1- through the pipe 7 and the pressure pd in the C chamber 25 connected to the outlet side 2a of the condenser 2 is established. Since pc>Pd, the valve seat 22 is closed and the normal operating state is entered. Next, the time of stopping will be explained. When the compressor 1 is stopped by an automatic temperature controller (not shown), the pressure drop in the condenser 2 disappears, and the pressure on the discharge side 1b of the compressor 1 and the outlet side 2a of the condenser 2 becomes equal. Then, the pressure P in chamber C
The relationship between C and the pressure Pd in chamber D becomes pc2pd, and the valve seat 22 is opened. By opening the valve seat 22,
The pressure in the A chamber 23 becomes approximately the same as that in the B chamber 24 via the pipe 9 and the C chamber 25, and the pressure becomes pa and pb, and the valve seats 211 are closed. At the same time, the suction side 1a of the compressor 1 is connected to the pipe 8°B chamber 24. Room C25. Pipe 9. The pressure is balanced with the discharge side 1b of the compressor 1 via the condenser 2. At this time,
The pressure of the evaporator 4 can be substantially maintained at the pressure state during operation due to the fact that the refrigerant control valve section 10b is closed and the check valve 6 functions.

As described above, according to the present invention, by using the differential pressure valve 10 including the refrigerant control valve section 10b, the balance valve section], and the OC in the refrigeration cycle, when the compressor 1 is stopped during intermittent operation, the high pressure side This prevents hot gas from flowing into the evaporator 4, thereby reducing power consumption.
It is possible to completely balance the pressures between the compressor 1 and the discharge side 1b, and to reduce the starting torque of the compressor 1, making it possible to downsize the compressor 1 and reduce the cost of the starting device without consuming electricity. .

〔Effect of the invention〕

According to the present invention, by using a differential pressure valve having a refrigerant control valve section and a balance valve section in the refrigeration cycle, the high-pressure side is connected to the evaporator during intermittent operation of the refrigeration cycle and when the compressor is stopped. It is possible to prevent the inflow of gas and quickly balance the pressure between the discharge and suction sides of the compressor, reducing power consumption, reducing the starting torque of the compressor, and making the compressor more compact. This has the effect of simplifying the starting device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional refrigeration cycle, FIG. 2 is a block diagram of a refrigeration cycle of a refrigeration apparatus according to the present invention, and FIG. 3 is a sectional view of a differential pressure valve used in the refrigeration cycle of the present invention. 1... Compressor, 2... Condenser, 3... Pressure reduction device, 4
... Evaporator, 6... Check valve, 10... Differential pressure valve. Continued from page 1 ■ Inventor Kuninari Araki [Co., Ltd.] Inventor Hiroshi Kogure 800 Oaza Tomita, Ohira-cho, Shimoga-gun, Tochigi Prefecture Hitachi, Ltd. Tochigi Factory

Claims (1)

[Claims] A refrigerant control valve that opens when the compressor is operating and closes when the compressor stops, in a refrigeration cycle that sequentially connects a compressor, condenser, pressure reducing device, evaporator, and check valve. The refrigerant control valve is connected to the condenser outlet side and the pressure reducing device. A refrigeration system characterized in that a balance valve section is interposed and connected between an inlet side of the condenser, a balance valve section is interposed and connected between an outlet of a condenser and a suction side of a compressor, and a pressure impulse pipe is connected to a discharge side of the compressor.