JPS60219492A - Horizontal rotary compressor - Google Patents

Abstract

PURPOSE:To prevent the flow-out of the high-pressure gas into the cycle and improve the capacity of a discharge valve by forming a valve for preventing the flow-out of the gas in a sealed case into the cycle in operation stop, separately from a discharge valve. CONSTITUTION:The gas compressed in a cylinder 9 is discharged through a discharge valve 12, and reaches the first discharge hole 15 through a discharge passage 18, and blows-up a valve 20, and then the second discharge hole 16 is opened. Therefore, a portion of the discharged gas fills the second discharge hole 16, and others fill a sealed case 2, and also the gas in the sealed case flows into the second discharge hole 16, and introduced outside the sealed case through a discharge pipe 19. Since, during the operation stop, the first and the second discharge holes 15 and 16 are closed by the dead weight of the valve 20, high- pressure gas is not introduced into the cycle.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-pressure container type horizontal rotary compressor used in refrigerators, showcases, etc.

Conventional structure and problems Conventionally, as shown in Fig. 1, a rotary compressor a
A cylinder plater d is placed in a high-pressure container type sealed case b.
It is common to have the same mechanical elements e.

In order to prevent the high-temperature, high-pressure gas in the closed case b from flowing into the refrigeration system (not shown) while the rotary compressor 9 is stopped and causing a heat load on the evaporator, a second pipe is installed near the discharge hole f. It is known that a discharge hole q is formed and a discharge valve is used to prevent stoppage.

However, in such conventional examples, when attempting to reduce the internal volume of the discharge hole q in order to prevent performance deterioration due to re-expansion during operation, the space for forming the second discharge hole q is reduced, and as a result, This resulted in a decrease in performance.

In addition, since one end of the discharge valve valve is fixed and the other end is the self-E end, the opening state of the discharge hole f changes depending on the gas flow flowing into the second discharge hole q, and its opening/closing behavior causes a discharge loss. There was a problem that led to this.

Furthermore, the discharge gas exits the discharge hole f and is discharged into the space inside the sealed case b, and then passes through the second discharge hole q and is introduced into the discharge pipe l, even though there is a space inside the sealed case b along that path. ,
The silencing effect was poor, and in addition, since the second discharge hole q was opened and closed, there was a drawback that the pulsation component of the discharged gas was large.

Purpose of the Invention The present invention completely prevents the leakage of high-pressure gas in the closed case to the cooling system during stoppage without deteriorating performance, prevents any adverse effects on the behavior of the discharge valve, and eliminates noise. The purpose is to improve performance.

Composition of the Invention In view of the above points, the present invention separates the discharge valve from the pulp that prevents the gas inside the closed case from flowing into the system while it is stopped, and configures a silencing chamber in between. be. That is, a main discharge hole that communicates directly with the cylinder, a discharge valve that opens and closes this main discharge hole, a flat valve seat formed at the upper end of the side housing, and a sealed case arranged in parallel with this valve seat. The first step is to open inward. The second discharge hole is separated from the inside of the sealed case that communicates the first discharge hole with the main discharge hole; A self-weight type pulp that simultaneously closes the second discharge hole during stoppage is provided, and a silencing chamber is further interposed in the discharge passage. As a result, during operation, the pulp is blown up by the kinetic energy of the refrigerant gas after leaving the main discharge hole, the second discharge hole is communicated with the inside of the sealed case, and the compressed gas is sent to the system through the discharge. During the stoppage, the pulp moves to the first stage due to its own weight due to the disappearance of the kinetic energy of the discharged gas. This function closes the second discharge to prevent the gas in the sealed case from flowing out through the discharge pipe to the refrigeration system, so that the opening and closing of the pulp does not directly interfere with the operation of the main discharge valve. In addition, performance can be improved by reducing the internal volume of the main discharge hole and reducing the amount of re-expansion. Also,
Having a silencing chamber interposed in the discharge passage not only improves the silencing effect, but also alleviates the pulsating component of the discharged gas due to the silencing chamber, stabilizes the state of pulp blowing up, and reduces pulp chatter.

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

1 is a horizontal rotary compressor, and a sealed case 2
Inside are an electric motor 3 with a stator 3a and a rotor 3b, and a side plate 4. Cylinder plate 5. A mechanical element 7 on which a side plate 6 is superimposed is housed. Reference numeral 8 denotes a crankshaft supported by a main bearing 4a and a sub-bearing 6a of each side plate 4.about.6, and a rotary plate rotary piston 1o is mounted in a cylinder 9 on an eccentric portion 8a of the crankshaft. A main discharge hole 11 is provided in the side housing 6 so as to communicate with the cylinder 9, and is opened and closed by a discharge valve 12. 13 is a discharge valve holder. 14 is a flat valve seat formed at the upper end of the side housing 6, and a first discharge hole 16. Second discharge holes 16 are formed in parallel. The first discharge hole 15 is sealed in the case 2 with a cover 17.
It is isolated from the inner space and communicates with it through a discharge passage 18 that communicates with the main discharge hole 11 via a discharge valve 12 . Moreover, 18a is an expansion type muffling chamber interposed in the discharge passage 18. On the other hand, the second discharge hole 16 is directly communicated with and led out of the sealed case 2 through a discharge pipe 19 . 20 is a flat pulp whose both ends are loosely fitted and supported by a pair of guide bins 21 which are set up on the valve seat 14, and 22 is a stopper that restricts upward movement of the pulp 2o.

In such a configuration, during operation, the rotary piston 10
The gas compressed in the cylinder 9 by the rotation of the main discharge hole 1
1. It is discharged through the discharge valve 12, passes through the discharge passage 18, reaches the first discharge hole 16, and its kinetic energy blows up the valve 2o as shown by the two-dot chain line in FIG. 16 will be established. Therefore, part of the discharged gas fills the second discharge hole 16 and the other part fills the sealed case 2, and the gas inside the sealed case 2 also flows into the second discharge hole 16, passes through the discharge pipe 19, and exits the sealed case 2. The normal cooling cycle is carried out.

At this time, the discharged gas having a large pulsating component that has exited the main discharge hole 11 is reduced by the silencing chamber 18a, and the pulsating component is reduced.
The blowing up of the gas is stabilized, and therefore the flow of the gas flow through the second discharge hole 16 can be stabilized.

Also, while the operation is stopped, the pulp 20
is the first due to its own weight. The second discharge holes 15 and 16 are closed, and the gas inside the sealed case 2 is released into the cooling system (e.g. condenser etc.).
Prevent leakage to.

Effects of the Invention With the above-described configuration, the present invention separates the discharge valve from the pulp compared to the conventional method, so the volume of the main discharge hole can be reduced, and the performance decreases due to the decrease in the amount of suction gas due to re-expansion. However, since the deformation behavior of the discharge valve cannot be prevented, the opening/closing valve efficiency is not reduced. Furthermore, since the pulp is placed on a flat valve seat formed at the upper end of the side plate, it can be formed without taking up much space, and since the valve closes due to its own weight, the pulp structure can be simplified and the operation can be simplified. Can improve reliability.

Furthermore, it is a matter of fact that the discharge gas flow can be operated quietly due to the silencing chamber provided in the discharge passage. It is possible to prevent an adverse effect on the gas flow passing through the discharge hole and to stabilize the gas flow.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a rotary compressor showing a conventional example, Fig. 2 is a sectional view of a horizontal rotary compressor showing an embodiment of the present invention, and Figs. 3 and 4 are m-m in Fig. 2.
5 is a cross-sectional view taken along the line v-v' in FIG. 4. 2... Sealed case, 4... Site housing, 5... Cylinder plate, 6...
...Sight housing, 9...Cylinder, 10.
... Rotary piston, 11 ... Main discharge hole, 12 ... Discharge valve, 14 ... Valve seat, 16 ... First discharge hole, 16...
・Second discharge hole, 18...Discharge passage, 2o...
... Pulp, 18a... Sound deadening chamber. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure t q u tztJb

Claims (1)

[Claims] It is equipped with a high-pressure container-type sealed case, a cylinder formed by laminating a side housing, a cylinder plate, and a side housing, and a rotary piston that rotates within this cylinder, and one of the side housings is connected directly to the cylinder. A main discharge hole that communicates with the main discharge hole, a discharge valve that opens and closes the main discharge hole, a flat valve seat formed on the upper end surface, and a flat valve seat provided in parallel with the valve seat and opened into the sealed case. A discharge hole comprising a first discharge hole and a second discharge hole, further communicating the second discharge hole with a discharge pipe, and communicating the first discharge hole and the main discharge hole while being separated from the inside of the sealed case. the first passage; A horizontal rotary compressor comprising a gravity type valve that simultaneously closes a second discharge hole during stoppage, and a silencing chamber interposed in the discharge passage.