JPS60204986A - Rotary type coolant compressor - Google Patents

Abstract

PURPOSE:To simplify the assembly and brazing for a refrigeration cycle by connecting a check valve and a discharge-gas cut-off valve onto the inlet side and the outlet side of an evaporator by piping the gas intake port and the gas injection port of a compressor mechanism into a refrigeration cycle. CONSTITUTION:A check valve 8 installed into a gas intake port 4b of a coolant compressor 4 and a discharge-gas cut-off valve 18 connected to a gas injection port 11 are provided integrally. Therefore, the check valve 8 and the discharge- gas cut-off valve can be connected to the inlet side and the outlet side of an evaporator (not shown in the figure) by piping the gas intake port 4b of the compressor and the gas injection port 11 into a refrigeration circuit. With such constitution, the assembly and brazing for the refrigeration cycle are simplified, and a number of manhour can be economized. Further, since a solenoid valve can be omitted, the electric-power cost for the valve can be saved, and energy economization is permitted, and since the necessary material can be reduced, cost cut is permitted markedly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used in refrigeration equipment such as refrigerators, and provides a check valve and discharge valve that prevents high-temperature, high-pressure gas from flowing into an evaporator when the compressor is stopped. The present invention relates to a rotary refrigerant compressor equipped with a gas cut valve.

Conventional configuration and its problems Conventional rotary refrigerant compressors are equipped with separate check valves and discharge gas cut valves, so when assembling the refrigeration circuit together with the condenser and others, it is difficult to connect each piping. I had to. Such a conventional example will be explained with reference to FIGS. 1 to 4. a is a hermetic rotary compressor (hereinafter referred to as a compressor), b is a condenser, and C is a discharge gas force using a solenoid valve.

d is a capillary tube, e is an evaporator, and f is a check valve, and these are piped in order in a ring shape to constitute a well-known refrigeration circuit. The discharge valve cut valve is connected to the compressor d.
During operation, the electromagnetic coil h is always energized to open the valve. In addition, the check valve f has a long vibration i arranged vertically.
and a valve that is installed inside this pipe i and closes under its own weight.

In the above conventional example, valves c and f are separate parts from the compressor, so assembly of the refrigeration cycle and brazing are extremely complicated and require a large number of man-hours.

In addition, the discharge gas force using the above solenoid valve, l・valve C, is:
While the compressor is in operation, it is necessary to open the valve, and the connections were made as shown in Figure 4, but power was consumed (2.1 to 2.6 W for a normal refrigerator) to open the valve. Furthermore, the cost is high because the number of component parts of this valve is large. That is, the valve consumes power and has high material costs. Furthermore, the above-mentioned check valve f was used in a vertical direction due to the operational constraint of closing due to the weight of the plastic valve body when the gas flow stopped, but a long vibrator i as shown in Fig. 3 was used. Materials are required and installation space is large. That is, it has disadvantages such as requiring a long pipe material and a large installation space.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional example. By simply configuring a refrigeration circuit by piping a refrigerant compressor to a condenser, evaporator, etc., the check valve and discharge gas cut valve can be automatically operated. To provide a rotary refrigerant compressor which is connected to a refrigeration circuit and is easily installed in the refrigeration circuit.

Structure of the Invention The present invention is a refrigerant compressor that is integrally provided with a check valve provided in the gas inlet of the refrigerant compressor and a discharge gas cut valve also connected to the gas outlet. By piping the inlet and gas outlet to the refrigeration circuit, a check valve and a discharge gas cut valve can be connected to the inlet and outlet sides of the evaporator, respectively.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 6th
The figure is a principle diagram for explaining the present invention. (A) is the main body of the hermetic rotary compressor, and the hermetic case (+': I
) has a built-in compression mechanism (c).

) is the gas ejection pipe of the compression mechanism (c). (-I
) is the suction port of the compression mechanism C]. (F) is the reverse valve main body that is airtightly connected to the suction port (E), and a check valve (G) is built inside the pipe. When the compressor stops operating, the high-pressure and high-temperature gas leaking from the cylinder enters the suction port (
Enter the check valve body (to) through E), and then enter the valve (G) to reverse 1.
Close. Therefore, since the aforementioned gas does not flow into the evaporator, the aforementioned heat loss does not occur. (The power is a discharge gas cut valve mechanism, which is airtightly connected to the gas jet pipe of the compression mechanism (c), and has a gas jet hole) and a discharge hole (3) that guides gas to the outside of the compressor. These holes (
It consists of a reed valve (7) provided at a position opposite to (7) and (3). The operation of the discharge gas force and valve mechanism (A) is such that when the compressor starts operating and gas is ejected from the gas ejection hole (N), the reed valve V) opens and the gas flows into the closed case (A). b) space within (accumulates in the station)

When the gas is subsequently ejected, the space (kari becomes high pressure).

As the reed valve (W) is opened by the pressure of the ejected gas, the high-pressure gas is discharged from the discharge hole (3) to the outside of the compressor (Y).

Next, when the compressor stops operating, the gas nozzle (nu)
Gas ejection from the valve stops and the reed valve (wa) is closed. At this time, as mentioned above, since the gas leaks from the cylinder etc. to the low pressure side suction port (E), the gas pressure in the gas jet is slightly lower than the effective pressure in the space (E), creating a differential pressure. The reed valve (W) is pressed by its own spring force and the above-mentioned differential pressure, and closes the discharge port (2).Therefore, the high-pressure gas is released from this part-C. , passing through the capillary tube and flowing into the evaporation ≧, and the above-mentioned heat loss does not occur.

A specific embodiment of the present invention will be described with reference to FIGS. 6 and 7. 1 is a compressor main body, and 2 is a sealed case in which an electric motor section 3, a compression mechanism 4, a check valve main body 5, a discharge gas filter, and a top pulp mechanism 6 are built.

The check valve main body 5 is airtightly fixed to the suction port 4bK of the compression mechanism 4. 7 is a valve seat built into the vibro a of the check valve main body 5, and the contact surface 7a of the reed valve 8 is inclined with respect to the vertical plane. A pin 9 supports the reed valve 8 above and is press-fitted into a hole in the valve seat 7, and is a filter 10.

Reference numeral 11 denotes a gas jet pipe whose one end is hermetically connected to the discharge port (not shown) of the compression mechanism 4, and whose other end is hermetically fixed to the discharge gas cuff (valve mechanism 6). 12
is a valve plate of the discharge gas cut valve m, rse, and is provided with a gas jet hole 13 and a valve seat sort 13a. A gas inflow hole 14 and a valve seat 14a are provided adjacent to the ejection hole 13. Reference numeral 16 denotes a gas outlet hole, one end of which is connected to the gas inlet hole 14, and the other end of which is airtightly connected to the discharge pipe 16. Reference numeral 17 designates a cover for a hole that is left open for the gas outlet hole 15 . Reference numeral 18 denotes a reed valve movably disposed at a position facing the jet hole and the inlet hole 13 and 14, and the valve stopper 1
9 and fixed to the valve plate 12 by bolts 2o.

Next, the inside of the check valve main body 5 will be explained with reference to FIG. As mentioned above, the contact surface 7a of the reed valve 8 is
It is inclined at an angle of about 10 to 30 degrees, and a trebanned valve seat 7b and a bottle hole 7C are provided on this surface. A bottle through hole 8a is provided above the reed valve 8, and a projecting portion 8b is provided below, which acts as a weight.

A ball-shaped head 9a is provided at one end of the bottle 9, which movably supports the reed valve 8 through the pin hole 8a and is press-fitted into the bottle hole 7 (+). The diameter of the pin head 9a is larger than the diameter of the bottle through hole 8a, so that the movable support valve 8 cannot be removed from the bottle head 9a.

Next, the function of the check valve main body 6 will be explained. While the compressor is in operation, the gas returned from the evaporator pushes open the reed valve 8 and flows in the direction of arrow M. When the compressor stops, gas leaking from the cylinder portion etc. flows in the opposite direction to arrow M. At this time, the reed valve 8 is moved by the weight of the weight 8b to the valve seat 7.
Although it is in contact with the valve seat b, it is pressed by the pressure of the backflow gas, and the contact force is further strengthened, and the valve seat is pressed against the valve seat b, thereby forming a backflow valve.

Next, the discharge gas cut valve mechanism 6 will be explained with reference to FIG. Although the reed valve 18 is movably disposed, it is necessary to prevent the valve from breaking due to excessive amplitude.
It is regulated by the hole 19 and fixed by a bolt 20 screwed into the bolt hole 12a of the valve plate 12. The reed valve 18 closes the gas ejection hole 13, the valve seat 13a, the gas inlet hole 14, and the valve seat 14a by its own spring force. In this embodiment, the reed valve 18 and the valve mechanism are described as being of a cantilevered type, but of course the same applies to a double-sided type as well. Also, a muffler 4 is attached to the compression mechanism 4.
a is provided in the explanation, but the present invention can be achieved even if the gas ejected from the compression mechanism 4 is routed directly to the gas ejection hole 13 without passing through the muffler 4a and omitting the gas ejection pipe 11. The purpose is the same.

Next, the operation of the discharge gas cut valve mechanism 6 will be explained.

During operation of the compressor, gas is ejected, passes through the ejection pipe 11, reaches the gas ejection hole 13, and pushes open the reed valve 18.

The gas then accumulates in the space inside the sealed case, and the space becomes under high pressure. When the gas is subsequently ejected, the reed valve 18 is opened. At this time, since the gas inflow hole 14 is also opened, the discharged gas flows from the closed space to the gas inflow hole 14. Pass the gas outlet hole 14 through the discharge pipe 16 as shown by the arrow M.
It is flowing in the direction of '.

When the compressor stops operating, the ejected gas stops, and the gas in the ejection pipe 11 and muffler 4a leaks from the cylinder section etc. to the low pressure side as described above, so the pressure decreases slightly from the pressure inside the sealed case, resulting in a differential pressure. arise. At this time, reed valve 18
is firmly pressed against the valve seat 13a by the action of both its own spring force and the differential pressure described above, thereby opening the valve seat 14a.

Therefore, the flow of gas to the gas inflow hole 14 is completely cut off.

Therefore, when the compressor stops operating, both the backflow valve body 6 and the discharge gas cut valve mechanism 6 cut off high-pressure, high-temperature gas and prevent it from flowing into the evaporator, causing the heat loss in the evaporator. do not.

When the compressor of the present invention is incorporated into a refrigeration cycle, conventional electromagnetic valves and check valves are no longer necessary, and therefore a large number of man-hours required for assembly and brazing can be saved. Furthermore, since the discharge gas cut valve 6 serves as a solenoid valve, the power consumption of the valve is reduced.

In addition, many practical effects can be obtained, such as less material usage and lower costs.

Note that since the check valve main body 6 is provided horizontally within the closed case, it has the advantage of requiring less space in the height direction.

Further, the check valve main body 5 may be provided outside the sealed case.

Effects of the Invention As is clear from the following explanation, the present invention utilizes a check valve provided in the gas inlet of a refrigerant compressor, a discharge gas force connected to the gas outlet, and a throat valve. By piping the gas inlet and gas outlet of this compressor to the refrigeration circuit, a check valve and a discharge gas cut valve can be connected to the inlet and outlet sides of the evaporator, respectively. Since it is made as follows, it has the following effects.

[r] Assembly and brazing with the refrigeration cycle becomes easy, and many man-hours can be omitted.

The CIO solenoid valve is no longer required, and the valve consumes no power at all, resulting in energy savings. Furthermore, since the amount of materials used is reduced, a significant cost reduction can be achieved.

C1 [l] The check valve, which was previously installed vertically, can be installed horizontally, so it does not require a large space.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional rotary refrigerant compressor with a high-pressure sealed case. Figure 2 is a block diagram of a refrigeration cycle using the compressor in Figure 1. The third factor is an enlargement of Figure 2. Block diagram, Fig. 4 shows the electric wiring of the solenoid valve shown in Fig. 3, Fig. 6 shows the principle of a rotary refrigerant compressor according to an embodiment of the present invention, and Fig. 6 shows the high pressure inside the sealed case of the present invention. FIG. 7 is an enlarged sectional view of the main part of FIG. 6, and FIG.
The figure is an exploded perspective view of the same check valve-equipped vibrator, and FIG. 9 is an expanded perspective view of the same discharge gas cut valve mechanism. 2 Airtight case, 3 Electric motor, 4 Compression mechanism, 4
b Gas inlet, 5. Pipe with reverse 1 valve, 6 Discharge gas cut valve mechanism, 11... Gas outlet (pipe)
, 12 ・Valve plate, 13 Gas outlet, 14
Gas discharge hole, 16 gas outlet (discharge valve), 18 reed valve. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Ward＼α M2 diagram, Figure 3, Figure 4

Claims (1)

[Claims] A check valve main body is provided at the gas inlet portion of a compression mechanism that is housed in a sealed case and compresses gas sucked in from outside the case and discharges it outside the case, and a check valve body is provided at the gas discharge port portion of the compression mechanism. A rotary refrigerant compressor equipped with a discharge gas cut valve that opens and closes depending on the pressure difference between the gas pressure in the case and the gas pressure in the compression mechanism.