JPS6329079A - Closed motor compressor - Google Patents

Abstract

PURPOSE:To reduce the flow resistance to aim at enhancing the energy efficiency, by dividing the inside of a resin suction muffler body, and by providing a tunnel shape gas passage, a rail-like projection above the latter and oil discharge holes in the vicinity of the peripheral edge parts of upper surfaces of bulkheads. CONSTITUTION:In a suction muffler 104, the inside of a resin body is divided into two chambers, a pair of bulkheads 104c define a tunnel shape gas passage 104a, and a rail-like projection 104b is formed along the inner wall surface of the body above the upper end opening section of the tunnel-like gas passage 104a. Further, oil discharge holes 104e are formed in the vicinity of the peripheral edges of upper surfaces of the bulkheads 104c. Oil mixed with gas and flowing into the muffler 104 through a gas suction hole 104a make contact with the inner wall which is at a high temperature and therefore is therefore foamed. Then, on the way of flow-down of oil along the inner wall, the oil is guided by the rail-like projection 10b so that it is discharged from the oil discharge hole 104e without entering into a gas passage 104d, while coolant gas is fed into a cylinder from a connecting part 104f through a gas introduction hole 105a. Thus, the flow resistance is low while the energy efficiency is high, and the number of required component is less so that the assembly ability is satisfactory.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic electric compressor (hereinafter referred to as a compressor) used in refrigerators and the like.

Conventional technology In recent years, the energy efficiency of compressors has been improved with the aim of saving energy, but one of the main technologies is that the suction gas is heated and expanded in a sealed case, and the suction gas has a low density. This improves suction and compression of gas in a cylinder, prevents a decrease in the density of suction gas, and increases suction efficiency.

An example of the conventional compressor mentioned above will be described below with reference to the drawings.

FIG. 4 is a cross-sectional view showing the structure of a conventional compressor, and FIG. 6 is a cross-sectional view of the suction muffler of the conventional compressor. In Figs. 4 to 6, 1 is a closed case, 2 is an electric element, and 3 is a compression element.

The electric element 2 and the compression element 3 are elastically supported within the closed case 1. 4 is the suction 77 arm, 5 is the cylinder head, and 6 is the suction tube. 4a is an upper lid of the suction muffler 4, 4b is a lower lid of the suction muffler 4, and 4c is a partition wall that divides the suction muffler 4 into two chambers. The upper cover 4a is fitted to the lower cover 4b to form an outer shell.

The partition wall 4c is held between the upper cover 4a and the lower cover 4bK. 4d is the gas suction hole, 4e is the connection part, 4a
is a gas passage, and 5a is a gas introduction hole. The gas suction hole 4d is provided in the side wall of the upper lid 4a, into which the suction tube 6 is fitted.

The gas passage 4q is a part of the partition wall 4c and is provided at a position offset from the upper end opening of the connecting portion 4e. The connecting portion 4e is formed of a steel pipe, passes through the bottom surface of the lower lid 4b, and connects to the gas introduction hole 6a at the upper end of the cylinder head 6.
mated to. 4f is an oil discharge hole provided on the bottom surface of the lower lid 4b.

The operation of the conventional compressor configured as described above will be explained below.

The gas returned from the suction tube 6 into the suction 77 4 is sucked in as shown by the arrow in FIG. 6 and enters a cylinder (not shown). The oil that mixes with gas and enters the suction Nufura 4,
The oil drips from the gas passage 4q provided in the partition wall 4c and flows out of the suction muffler 4 from the oil outlet 4f without entering the upper end opening of the connecting portion 4e.

Problems to be Solved by the Invention However, with the above configuration, it is necessary to increase the number of parts of the suction muffler due to the direction of extraction of the mold for molding the suction muffler, and therefore the cost of the parts increases. In addition, it takes time and effort to assemble, resulting in high costs and very poor workability.Additionally, the gas passages are narrow, creating flow path resistance and reducing energy efficiency. was.

In view of the above-mentioned problems, the present invention provides a compressor with a reduced number of suction muffler parts, low parts cost, good assembly workability, and less reduction in energy efficiency.

Means for Solving the Problems In order to solve the above problems, the compressor of the present invention has a suction muffler that includes a cylinder head that closes the cylinder to form a compression chamber and has a gas introduction hole, and The suction muffler consists of a connecting part that is inserted into an introduction hole and a suction muffler having a gas suction hole, and the suction muffler has a main body molded from resin, and the inside of the main body is divided into two chambers to form a tunnel-shaped gas passage. The gas pump includes a pair of partition walls, a rail-shaped projection provided along the inner wall surface of the main body at a position above the upper end opening of the gas passage, and an oil discharge hole located near the peripheral edge of the partition wall. be.

Effect of the Invention With the above-described configuration, the present invention makes it possible to integrally mold the partition wall, the rail-shaped protrusion provided above the upper end opening of the gas passage, the connection part, and the suction muffler main body, reducing parts costs. It also improves assembly workability. moreover,
Since oil flowing down the inner wall of the gas suction muffler is prevented from entering the gas passage by the rail-shaped protrusions, the gas passage can be widened and energy efficiency can be improved.

EXAMPLE Hereinafter, a compressor according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a compressor according to an embodiment of the present invention;
FIG. 2 is a sectional view of a suction muffler of a compressor according to an embodiment of the present invention, and FIG. 3 is a partial perspective view of the suction muffler of a compressor according to an embodiment of the present invention. . In Figures 1 to 3, 101 is a closed case, 102 is an electric element, and 1
03 is a compression element. The electric element 102 and the compression element 103 are elastically supported within the closed case 101. 104 is a suction muffler, 106 is a cylinder head, and 106 is a suction tube.

104a is a gas suction hole into which the suction tube 106 is inserted. 1o4b is a rail-shaped protrusion.

104c is a partition wall. The rail-shaped protrusion 104b is provided above the upper end opening of the pair of partition walls 104c forming the tunnel-shaped gas passage 1104d and along the inner wall of the suction muffler 104 molded from resin. There is. The partition wall 104C divides the suction muffler 104 into two rooms. The gas suction hole 104a is located above the rail-shaped protrusion 104b. Reference numeral 104a denotes an oil discharge hole, which is higher than the bottom surface of the partition wall and is connected to the gas passage 10.
4d and lower than the upper end opening of the suction muffler 10.
It is installed on the side wall of 4. 104f is a connection part, which is connected to the gas introduction hole 106a provided in the cylinder head 106.
Advance payment will be made.

The compressor configured as described above is shown in Figure 1 below.
The operation will be explained using FIGS. 2 and 3.

The gas returned from the suction tube 106 into the suction muffler 104 is sucked in as shown by the arrow in FIG. 2 and enters a cylinder (not shown). The oil mixed with the gas and entering the suction muffler 104 comes into contact with the high temperature inner wall of the suction muffler 104.
Becomes foamy. While flowing down along the inner wall of the suction muffler, the foamy oil hits the rail-shaped protrusion 104b, flows along this and falls without entering the upper end opening of the gas passage 104d, and flows through the oil discharge hole 104e. Suction muffler 1
04 is discharged outside.

As described above, according to this embodiment, the cylinder head 105 closes the cylinder to form a compression chamber and has the gas introduction hole 106a, the connecting portion 104f fitted into the gas introduction hole 106a, and the gas suction hole. 104a, the suction muffler 104 has a main body molded from resin, and the inside of the main body is divided into two chambers,
A pair of partition walls 1 forming a tunnel-shaped gas passage 104a
04c, and the gas passage 104 along the inner wall surface of the main body.
By providing the rail-shaped protrusion 104b provided above the upper end opening of d and the oil discharge hole 104e located near the upper surface periphery of the partition wall 104C, the rail-shaped protrusion 104b for oil separation and the gas The passage 1o4d can be integrally molded with the main body, resulting in a suction muffler with a small number of parts and low flow path resistance.

Effects of the Invention As described above, the present invention provides a cylinder head that closes a cylinder to form a compression chamber and has a gas introduction hole, a connecting portion that is fitted into the gas introduction hole, and an intake muffler that has a gas suction hole. The suction muffler consists of a main body molded from resin, a pair of partition walls that divide the inside of the main body into two chambers and form a tunnel-shaped gas passage, and a gas passage along the inner wall surface of the main body. By providing the rail-shaped projection provided above the upper end opening and the oil discharge hole located near the periphery of the upper surface of the partition wall, flow path resistance is reduced, resulting in good energy efficiency.

Furthermore, since the number of parts is small, a compressor with good assembly workability can be obtained at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a compressor according to an embodiment of the present invention, FIG. 2 is a sectional view of a suction muffler of a compressor according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. A perspective view showing a part of the suction muffler of the compressor in FIG.
The figure is a sectional view showing the structure of a conventional compressor, and FIG. 5 is a partial sectional view of a suction muffler of the conventional compressor. 101... Sealed case, 102... Electric element, 103... Compression element, 104...
...Suction muffler, 104a...Gas suction hole, 1
o4b...Rail shape, 104C...
・Partition wall, 104d...Gas passage, 104e...
...Oil drain hole, 104f...Connection part,
105...Cylinder head, 105a・River...
Gas introduction hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 70
No-8 closed case / θ4-suction, inlet mag hook 4-muffler 70μ-force's sales no J Otsu 104/)-L Kuttocos δゎ sudden change/α 4d-sword 1n also 104e-- Oil weir P exit 104f-One Hollyhock 10S--Sylinta pet No. 2 /Q5 Kyu-Force input hole 709 colors 10d-One suction muffler 104L-Force suction, hole /θ4d-Force Kutopshi/θ4ε-FyKunihimi-ni 104f-1 Part 1 Part 3 Figure 3 /θsct, -- Force diagram ◇ is also Figure 4

Claims (1)

[Claims] A cylinder comprising an elastically supported electric element and a compression element disposed in a sealed case; a cylinder head that closes the cylinder to form a compression chamber and has a gas introduction hole; It consists of a suction muffler having a connecting part that is inserted into the gas introduction hole and a gas suction hole, and the suction muffler has a main body made of resin, and the inside of the main body is divided into two chambers, and a tunnel-shaped gas passage is provided. a pair of partition walls formed therein; a rail-shaped protrusion provided along the inner wall surface of the main body at a position above the upper end opening of the gas passage; and an oil discharge hole located near the periphery of the upper surface of the partition wall. A hermetic electric compressor characterized by: