JP3072422U - Compressor accumulator - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent liquid refrigerant from entering an inner pipe of an accumulator without increasing the number of parts and the number of assembly steps. A baffle (4) that partitions the internal space of the housing (1) into an upper chamber (5) and a lower chamber (6), and an inner pipe (8) whose inlet (81) opens upward inside the lower chamber (6). Provide.
The baffle 4 is provided with a through hole 9 for communicating the upper chamber 5 and the lower chamber 6. The through hole 9 is located on the side of the inlet 81 of the inner pipe 8. A downwardly facing cylindrical portion 92 is continuously provided at the edge portion 91 of the through hole 9.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an accumulator for a compressor.

[0002]

[Prior art]

 In a compressor interposed in a refrigeration cycle employed in an outdoor unit of an air conditioner or the like, an accumulator is installed at a refrigerant inlet side to prevent liquid refrigerant from being sucked into a compression chamber of the compressor. . An accumulator of such a compressor is described in Japanese Patent Publication No. 3-55755.

FIG. 5 shows a basic structure of an accumulator of this type. In the accumulator shown in the figure, a refrigerant inlet 2 is provided at the upper end of a vertically long casing 1, and a connecting pipe 3 is attached to the refrigerant inlet 2 as necessary. When the connection pipe 3 is attached, the outlet (not shown) of the evaporator in the refrigerating cycle is connected to the connection pipe 3, and when the connection pipe 3 is not attached, the refrigerant inlet 2 is connected. The outlet (not shown) of the evaporator is connected to the evaporator. The internal space of the housing 1 is partitioned by a baffle 4 into an upper chamber 5 on the side of the coolant inlet 2 and a lower chamber 6. A screen 7 is provided in the upper chamber 5 so that the refrigerant flowing from the refrigerant inlet 2 passes through the screen 7.

An inner tube 8 is provided concentrically with the housing 1 inside the lower chamber 6. The inner pipe 8 has an inlet 81 that opens upward inside the lower chamber 6, and the inlet 81 faces the center of the baffle 4. The inner pipe 8 extends from the lower end of the housing 1 to below the housing 1, and an outlet 82 thereof is connected to a suction port of a compressor (not shown). In addition, the drawing-out point A of the inner pipe 8 from the housing 1 is joined in a liquid-tight manner.

Further, the baffle 4 is formed in a dome shape which bulges upward at an upper position of the inlet 81 of the inner pipe 8, and through holes 9 are provided at a plurality of positions outside the dome-shaped bulge portion 41. Has been established. As described above, since the through holes 9 are formed at a plurality of positions outside the dome-shaped bulging portion 41, the through holes 9 are located beside the entrance 81 of the inner pipe 8. The through hole 9 is formed by a mere opening as shown in FIG. 5, and the rim 91 of the opening is flush with the upper and lower surfaces of the baffle 4. The accumulator described in Japanese Patent Publication No. 3-55755 has the same configuration.

In the accumulator shown in FIG. 5, a through hole 9 formed in the baffle 4 is used to supply a liquid portion of the refrigerant flowing from the refrigerant inlet 2 to the upper chamber 5, that is, a liquid refrigerant, outside the inner pipe 8. The liquid refrigerant is introduced into the lower chamber 6 outside the inner pipe 8 through the through hole 9, whereby the liquid refrigerant is sucked into the compressor through the inner pipe 8. Is prevented.

However, in the accumulator described with reference to FIG. 5, the through hole 9 provided in the baffle 4 is formed by a mere opening as described above. Since the liquid refrigerant passing through the through-hole 9 moves along the edge 91 and the lower surface of the baffle 4 and moves toward the center of the baffle 4, it is flush with the lower surface. A situation of falling inside can occur. In particular, depending on the installation state of the accumulator and the mounting accuracy of the baffle 4 with respect to the housing 1, the baffle 4 may be tilted. . Further, a situation may occur in which the liquid refrigerant that has passed through the through hole 9 scatters immediately after falling from the rim portion 91 and falls into the inlet 81 of the inner pipe 8. When the above-described situation occurs, a situation occurs in which the liquid refrigerant is sucked into the compressor from the outlet 82 of the inner pipe 8, and there is a possibility that the stability of the compression performance of the compressor is impaired. .

In view of the above, conventionally, as shown in FIG. 6, a sub-baffle 45 having a downwardly expanding shape is attached to the back surface of the central portion of the baffle 4 so that the sub-baffle 45 covers the inlet 81 of the inner tube 8 from above. In this case, the liquid refrigerant is blocked by the sub-baffle 45, so that the liquid refrigerant passing through the through hole 9 does not enter the inlet 81 of the inner tube 8. 5 and 6, the moving direction of the liquid refrigerant is illustrated by arrows.

[0009]

[Problems to be solved by the invention]

 However, the sub-baffle 45 shown in FIG. 6 is a separate component from the baffle 4, and also requires extra time for attaching the sub-baffle 45 to the baffle 4. As a result, the number of parts and the number of assembling steps have increased, which has caused a cost increase.

The present invention has been made in view of the above situation and problems, and in spite of the fact that the sub-baffle 45 shown in FIG. 6 can be omitted, a situation in which the liquid refrigerant is sucked into the compressor. It is an object to provide an accumulator that does not occur. In particular, an object of the present invention is to provide an accumulator that does not cause a situation in which liquid refrigerant is sucked into a compressor even if the baffle is inclined due to the installation state of the accumulator and the mounting accuracy of the baffle 4.

[0011]

[Means for Solving the Problems]

 The accumulator of the compressor according to the present invention includes a baffle that partitions the internal space of the housing into an upper chamber on the refrigerant inlet side and a lower chamber for storing liquid refrigerant inside a housing having a refrigerant inlet at an upper end. An outlet connected to the suction inlet of the compressor, and an inlet having an inlet opened upward inside the lower chamber, and the baffle is located at a side of the inlet of the inner pipe. Thus, a through-hole for communicating the upper chamber and the lower chamber is formed. This configuration is also provided in the conventional accumulator described with reference to FIG. According to the present invention, in the accumulator having the above configuration, a downwardly facing cylindrical portion is continuously provided at an edge portion of the through hole.

According to this accumulator, the liquid refrigerant that has passed through the through hole falls along the inner surface of the cylindrical portion. Moreover, since the through-hole in which the cylindrical portion is continuously provided is located on the side of the inlet of the inner pipe as described above, not only when the baffle 4 is horizontal, but also when the accumulator is installed. Even if the baffle is inclined due to the mounting accuracy of the baffle 4, the liquid refrigerant that has fallen down along the inner surface of the cylindrical portion enters the lower chamber of the housing without entering the inlet of the inner tube and is temporarily stored. Then, it evaporates and enters the inlet of the inner pipe, and is sucked into the suction port of the compressor.

[0013] The cylindrical portion may be formed by drawing or by burring. Here, drawing is to form a pilot hole in the baffle and then drawing around the pilot hole to project the cylinder downward, and burring is to form the through hole in the baffle. Is made by protruding a downward hole around the pilot hole with a conical or cylindrical punch to project a downward cylinder. In any of these processes, a downwardly facing tubular portion is continuously provided at the edge of the through hole.

As described above, when the cylindrical portion is formed by drawing or burring, the cylindrical portion is formed by a part of the plate material forming the baffle, so that the baffle and the cylindrical portion are separated from each other. There is no need to make parts, and since there is no need for extra time to attach the cylinder to the baffle, it is possible to easily reduce costs.

In the present invention, it is desirable that the opening of the inlet of the inner pipe is at a height level equal to or higher than the lower end of the cylindrical portion. According to this, the effect that the liquid refrigerant dropped along the inner surface of the cylindrical portion enters the lower chamber of the housing without entering the inlet of the inner tube and is temporarily stored is more reliably exhibited.

In the present invention, the baffle is formed in a dome shape that protrudes upward at an upper position of the inlet of the inner pipe, and the through hole is formed in a dome-shaped bulge portion of the baffle. It is desirable to be set up at a plurality of locations outside. According to this, when the liquid refrigerant flows into the upper chamber of the housing, the liquid refrigerant flows down toward the periphery of the bulging portion by the dome-shaped bulging portion of the baffle, so that the liquid refrigerant quickly passes through the hole. And fall into the lower chamber through the cylindrical part.

[0017]

[Embodiment of the invention]

 FIG. 1 is a schematic longitudinal sectional side view of an embodiment of an accumulator of a compressor according to the present invention. The accumulator shown in the figure is different from the accumulator described with reference to FIG. 5 in that the central portion of the baffle 4 is formed flat and the dome-shaped bulging portion 41 shown in FIG. 5 and a short downwardly extending cylindrical portion 92 is continuously provided at the rim portion 91 of the through hole 9 of the baffle 4. The other configuration is the same as that described with reference to FIG. In order to simplify the description, the same components are denoted by the same reference numerals, and detailed description is omitted. FIG. 2 is a schematic longitudinal sectional side view of another embodiment of the accumulator of the compressor according to the present invention. 1 differs from the accumulator illustrated in FIG. 1 in that a dome-shaped bulging portion 41 is provided at the center of the baffle 4. Other configurations are the same as those in FIG. 1. Therefore, in the accumulator in FIG. 2, the same reference numerals are given to the same portions as those in FIG.

FIG. 3 is an enlarged view of a main part of FIG. As shown in the figure, the cylindrical portion 92 protrudes downward from the edge portion 91 of the through hole 9. The height level of the opening of the inlet 81 of the inner pipe 8, that is, the height level of the upper end 83 of the inner pipe 8 is equal to the height level of the lower end 93 of the cylindrical portion 92. In this regard, the height level of the opening of the inlet 81 of the inner pipe 8 may be higher than the height level of the lower end 93 of the cylindrical portion 92. In addition, when forming the baffle 4 with a steel plate, the cylindrical portion 92 is formed by forming a through hole 9 in the steel plate, drawing the periphery of the prepared hole, and projecting downward in a cylindrical shape. It is formed by adopting a processing method of making it work. As another method for forming the cylindrical portion 92, burring can be employed. The burring process is a method in which a pilot hole is formed in the baffle 4 or a steel plate material as a work of the baffle 4, and the periphery of the pilot hole is projected downward in a cylindrical shape with a punch. A downwardly directed cylindrical portion 92 is continuously provided on the rim portion 91 of the through hole 9 by any of these drawing and burring processes. Therefore, in the accumulator according to this embodiment, since the cylindrical portion 92 is formed by a part of the steel plate material forming the baffle 4, the baffle 4 and the cylindrical portion 91 do not need to be separate components. In addition, since there is no need to extraly attach the tubular portion 92 to the baffle 4, the cost is greatly reduced as compared with the case where the sub-baffle 45 described with reference to FIG. The configuration and the forming method of the tubular portion 92 described above are similarly applied to the case where the tubular portion 92 is provided in the baffle 4 having no bulging portion shown in FIG. Therefore, the cost of the accumulator of FIG. 1 is significantly reduced as compared with the case where the sub-buffer 45 described with reference to FIG. 6 is used.

According to the accumulator of the embodiment described with reference to FIG. 1, FIG. 2, or FIG. 3, the liquid refrigerant flowing into the upper chamber 5 of the housing 1 and passing through the through hole 9 travels along the inner surface of the cylindrical portion 92. After falling into the lower chamber 6 outside the inner pipe 8 and temporarily storing in the lower chamber 6, it is vaporized, enters the inlet 81 of the inner pipe 8, and is sucked into the suction port of the compressor. In particular, since the height level of the upper end 83 of the inner pipe 8 is equal to or higher than the height level of the lower end 93 of the cylindrical portion 92, the liquid refrigerant passing through the through hole 9 Is prevented from entering the inlet of the inner pipe 8 as much as possible. This effect is exerted even if the baffle is inclined due to the installation state of the accumulator and the mounting accuracy of the baffle 4. Therefore, a situation in which the liquid refrigerant is sucked into the compressor and the compression performance becomes unstable does not occur.

In the accumulator described with reference to FIGS. 2 and 3, the baffle 4 is formed in a dome shape that bulges upward at an upper position of the inlet 81 of the inner tube 8. The liquid refrigerant flowing into the chamber 5 flows down toward the periphery of the bulged portion 41 by the dome-shaped bulged portion 41 of the baffle 4, whereby the liquid refrigerant quickly flows through the through-hole 9 and the cylindrical portion. Since it falls into the lower chamber 6 through 92, the performance of the refrigeration cycle in which the accumulator is interposed is stabilized.

In the accumulator described with reference to FIG. 1, FIG. 2 or FIG. 3, although the cylindrical portion 92 connected to the rim portion 91 of the through hole 9 has a cylindrical wall, The shape of the cylindrical wall of the cylindrical portion 92 does not necessarily have to be a regular cylindrical shape as shown in FIG. 1, FIG. 2 or FIG. FIG. 4 shows an example in which the cylindrical portion 92 is formed in a constricted shape. It has been confirmed that the same effect as described above is exerted even when the cylindrical portion 92 has a constricted shape as shown in FIG. In FIG. 4, to avoid repetition of the description, the same or corresponding parts as those in FIG.

[0022]

[Effect of the invention]

 As described above, according to the present invention, it is possible to prevent the liquid coolant from being sucked into the compressor without using the sub-baffle described in FIG. In addition, it is possible to reduce the number of parts and the number of assembling steps by omitting the sub-baffle, making it easier to reduce costs. Nevertheless, the liquid refrigerant is sucked into the compressor. It is possible to increase the stability of the compression performance of the compressor by preventing it.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional side view of an embodiment of an accumulator of a compressor according to the present invention.

FIG. 2 is a schematic longitudinal sectional side view of another embodiment of the accumulator of the compressor according to the present invention.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is an enlarged view of a main part corresponding to FIG. 3 for explaining a modified example of a cylindrical portion.

FIG. 5 is a schematic vertical sectional side view showing a basic configuration of the accumulator.

FIG. 6 is a schematic vertical sectional side view of a conventional accumulator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Refrigerant inlet 4 Baffle 5 Upper chamber 6 Lower chamber 8 Inner pipe 9 Through hole 41 Inflated part 81 Inner pipe inlet 82 Inner pipe outlet 92 Tube part 91 Edge of through hole 92 Lower end of tube part

Claims (5)

[Utility model registration claims] A baffle for partitioning an internal space of the housing into an upper chamber on the refrigerant inlet side and a lower chamber for storing a liquid refrigerant; An outlet is connected to the mouth, and the inlet is provided with an inner pipe which is opened upward inside the lower chamber. What is claimed is: 1. An accumulator for a compressor, comprising a through-hole communicating with a lower chamber, wherein a downward cylindrical portion is continuously provided at an edge of the through-hole. 2. The method according to claim 1, wherein said cylindrical portion is formed by drawing.
The accumulator of the compressor described in 1 above. 3. The accumulator of a compressor according to claim 1, wherein the cylindrical portion is formed by burring. 4. The compressor according to claim 1, wherein the opening of the inlet of the inner pipe is at a height level equal to or higher than the lower end of the cylindrical portion. accumulator. 5. The baffle is formed in a dome shape bulging upward at an upper position of an inlet of the inner pipe, and the through holes are formed outside a dome-shaped bulge portion of the baffle. The accumulator of a compressor according to any one of claims 1 to 4, wherein the accumulator is set up at a location.