JPH0447574Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a suction cutter for a refrigeration compressor.In mass production, this invention can reduce manufacturing man-hours and greatly reduce costs. It can be widely used in the field of manufacturing or using.

Conventional technology Conventionally, a suction cup for a refrigeration compressor is constructed by connecting two iron cases, and its manufacturing method is as follows.
One case and the other case were connected by carbon dioxide gas welding, and one case and the copper inlet pipe and the other case and the copper outlet pipe were connected by hand soldering, so different sealing means were mixed and three It required a process.

Problems that the invention aims to solve This invention improves the two types of sealing means that required three steps that were conventionally performed, and seals all joints in one step using one type of brazing sealing means. This structure reduces manufacturing man-hours and costs, which were problems in conventional manufacturing.Especially in mass production, it solves the problem of continuous sealing using a non-oxidation furnace (reducing furnace), which had been a problem in the past. It is something that can be solved.

Means to Solve the Problem This invention reduces the manufacturing cost of suction cups by making it easier to weld and braze, which conventionally caused high costs, and mass-produces suction cups by using continuous sealing means using a continuous oxygen-free furnace. It is a structure that can make it possible.

That is, in a suction cup for a refrigeration compressor, which is constructed by connecting two cases, one case has an inlet pipe connected to an evaporator, and the other case has an outlet pipe connected to a compressor. In one case, the opening is widened by drawing steps in the same direction, and the bottom part of the inner drawing is formed with an inlet pipe mounting hole that protrudes outward, and a filter with a peripheral edge is fitted inside. However, the other case has an outlet pipe mounting hole that protrudes inward at its narrowed bottom, and the opening of one case and the periphery of the filter fitted inside, the opening of one case and the other fitted inside. The opening of the case, the joints between the inlet pipe mounting hole of one case and the fitted inlet pipe, and the joints of the outlet pipe mounting hole of the other pipe and the fitted outlet pipe should be made with one case on the bottom and the other When silver solder is attached to the upper part of each joint with the case facing upward, the molten silver solder flows downward into the joint gap of each joint, and all the joints are soldered at the same time. This is a suction cup for a refrigeration compressor.

Function The present invention apertures the two cases by changing the aperture diameter in one direction, and the two cases, one case and the inner filter periphery, one case and the inlet pipe, and the other case. and the outlet pipe, one case is on the bottom side and the other case is on the top side, silver solder is attached to the upper part of each joint, and then heated. When heated, the molten silver solder flows downward. Since it flows into the joint gap at the same time, it is possible to braze all joints of both cases in one process. Therefore, brazing work can be performed continuously using a continuous oxygen-free furnace, facilitating mass production.

Embodiment Next, an embodiment of the present invention will be described with reference to FIG.
Cases 1 and 2 are iron cases, and case 1 has its opening enlarged by changing the diameter of the aperture and sequentially constricting it in the same direction as shown in Figure 2.The bottom of the inwardly constricted area has an inlet pipe that protrudes outward. A mounting hole portion 9 is formed. Further, a filter 5 with its peripheral edge facing toward the opening 8 is press-fitted into one case 1, and is fixed by a protrusion 6 provided on the peripheral edge. The other case 2 is the third
As shown in the figure, an outlet pipe attachment hole 11 that projects inward is formed in the bottom portion of the inner drawer. The opening 10 of the other case 2 is fitted into the expanded opening 8 of one case 1, the copper inlet pipe 3 is inserted into the inlet pipe attachment hole 9 of one case 1, and the inlet pipe 3 of the other case 2 is inserted. Insert the copper outlet pipe 4 into the outlet pipe attachment hole 11.

The opening 8 of one pipe 1 and the opening 10 of the other case 2 fitted inside, the peripheral edge of the filter 5 fitted inside one pipe 1, the inlet pipe mounting hole 9 of one case 1 and the inside fitting Inlet pipe 3,
Each joint between the outlet pipe attachment hole 11 of the other case 2 and the fitted outlet pipe 4 is located at a position close to the top of each joint when one case 1 is placed on the lower side and the other case is placed on the upper side. It becomes easier for the silver solder 7 to adhere, and when the silver solder 7 is heated and melted, it is fitted so as to flow into the joint gap between the joint parts in the downward direction.

In this state, one case 1 is placed on the lower side and the other case 2 is placed on the upper side, silver solder 7 is attached to a position close to the upper part of each joint, and when heated in a continuous oxygen-free furnace, the molten silver solder 7 is Each flows into the joint gap in the downward direction, and all joints are brazed at the same time.

Effects of the invention As mentioned above, this invention has a structure that allows silver brazing of all the joints of the case to be done simultaneously in one process, which enables mass production using a continuous oxygen-free furnace and improves productivity. This has the effect of significantly shortening the conventional manufacturing process and significantly reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the suction cup according to the present invention, FIG. 2 is a partially cutaway front view of one case, and FIG. 3 is a partially cutaway front view of the other case. In the figure, 1 is one case, 2 is the other case, 3 is an inlet pipe, 4 is an outlet pipe, 5 is a filter, 6 is a projection, 7 is a silver solder, 8 is an opening, 9 is an inlet pipe mounting hole part, 10 is the opening part, 1
1 indicates the outlet pipe mounting hole.

Claims (1)

[Scope of utility model registration request] It is constructed by connecting two cases, and an inlet pipe 3 connected to an evaporator is connected to one case 1,
In a suction cup for a refrigeration compressor in which the outlet pipe 4 connected to the compressor is connected to the other case 2, one case 1 is expanded in steps in the same direction to widen the opening 8, and the inside of the case 1 is expanded at the bottom. forms an inlet pipe attachment hole 9 that protrudes outward, and a filter 5 having a peripheral edge is fitted inside, and the other case 2 has an outlet pipe attachment hole 11 that protrudes inward at the bottom that is narrowed on the inside. , one case 1 and the peripheral edge of the filter 5 fitted inside, the opening 8 of one case 1 and the opening 10 of the other case 2 fitted inside, and the inlet pipe attachment hole of one case 1. 9 and the inlet pipe 3 fitted inside, and the outlet pipe mounting hole 11 of the other case 2 and the fitted outlet pipe 4 are connected to each other with one case 1 on the lower side and the other case 2 on the upper side. A refrigeration compressor in which all joints are brazed at the same time by fitting so that when silver solder is attached to the upper part of each joint, the molten silver flows downward into the joint gap of each joint. suction cup.