JPS618481A - Compressor - Google Patents

Abstract

PURPOSE:To prevent suction resistance in a suction passage from increasing, by housing each of setting legs of a valve guard in a concave part of a partition wall. CONSTITUTION:A partition wall 7, keeping up a slight clearance with a valve guard 11 and surrounding this at an angle of about 270 deg., is installed. In this partition wall 7, there are provided with both concave parts 16 and 16. Each of setting legs 14 and 14 of the valve guard 11 are constituted so as to be housed in these concave parts 16 and 16. This housing part alone is projected to the side of a suction chamber 9 whereby any reduction in a gas flow passage of the suction chamber is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compressor used in a refrigeration system, and relates to a compressor that utilizes a ring-shaped discharge valve.

Generally, the upper end of the piston has a protrusion that fits loosely into the valve plate.
In a piston that uses a so-called convex type piston, the valve holder that restricts the lift of the discharge valve cannot be supported at the center of the valve plate.

Therefore, in this case, a mounting leg is provided on the outer circumferential side of the valve holder, but if this is done, the radius of the high pressure chamber in the cylinder head where the discharge valve is located becomes narrower, and the lower pressure chamber located outside of this high pressure chamber This increases the gas flow path from the to the suction valve, which has the disadvantage of increasing suction resistance.

In view of this point, the present invention aims to eliminate the above-mentioned drawbacks by making the shape of the partition wall that separates the high pressure chamber and the low pressure chamber in the cylinder head unique.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

1 is a ring, and 2 is a piston disposed in the cylinder 1 so as to be able to slide back and forth, and a truncated conical projection 2fL is provided at the top of the piston. Reference numeral 3 denotes a valve plate, which is provided with a discharge opening 4 having a circular cross section into which the protrusion 2a is loosely fitted, and a suction passage 5 which is opened slanting outward from the cylinder side toward the opposite cylinder side. 6 is a ring head, and a high pressure chamber 8F is formed in the center by a dividing wall 7VC! :% A low pressure chamber 9 is defined around its outer periphery. 10 is a ring-shaped discharge valve, and this discharge valve 1
0 is supported on the flange 12a of the stud bolt 12 at the center of the valve foot 11 on the center side, and on the outer peripheral side on the valve plate 3. That is, a donut-shaped discharge hole 13 is formed by the flange 12& and the discharge opening 4.

On the other hand, the valve leg holder 11 is formed so that three mounting legs 14 protrude outward in the normal direction, and is attached to the valve plate 11 with bolts 15.

The partition wall 7 is formed to surround the valve leg 11 at an angle of about 270° with a slight gap between the mounting leg 14 and the valve leg 11.
A recess 16 is formed in a portion facing the
The mounting legs 14 are housed inside.

Reference numeral 17 denotes a suction opening of the suction passage 5 which opens between each recess 16 close to the partition joint. Further, 18 is a suction valve, and 19 is a relief hole provided in the valve foot 11.

According to this configuration, the lowering of the piston 2 causes the low pressure chamber 9 to
Gas enters the suction passage 5. The gas f'L is sucked into the norinda 1 through the suction valve 18 and then compressed by the rising of the piston 2 through the discharge hole 13. It is discharged into the high pressure chamber 8 through the discharge valve 1°. At this time, since the partition wall 7 other than the suction opening 17 and the recess 16 is at the shortest distance from the suction valve 18, the suction passage 5
resistance can be reduced.

As described above, in the present invention, a high pressure chamber and a low pressure chamber are defined inside the printer head by a dividing wall, and the high pressure chamber 1/fi I
A valve plate in which a J-song shaped discharge valve and a valve foot are arranged, a suction passage having one end opened to the low pressure chamber and the other end opened to a suction valve, and a discharge hole opened and closed by the discharge valve. A mounting leg is formed that projects in the normal direction of the valve leg, and a recess for storing the mounting leg is provided in the partition wall, and the mounting leg of the valve leg is accommodated. By forming a recess in the partition wall, the suction path can be shortened, the suction efficiency can be improved, and the EER (energy efficiency)'f can be improved. Further, especially when a convex type piston is used, the performance can be further improved by reducing the top clearance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a compressor taken along line I-1' in FIG. 2, showing an embodiment of the present invention, and FIG.
' It is a sectional view taken along the line. 3...Valve plate, 5...Suction path, 6...
... Nlinder head, 7 ... Division wall, 8.
...High pressure chamber %9...Low pressure room, 10...
...Discharge valve, 11... Valve leg, 13...
...Discharge hole %14...Mounting leg, 15...
・Concavity. Name of agent: Patent attorney Toshio Nakao and 1 other list
1 figure

Claims (1)

[Claims] A high pressure chamber and a low pressure chamber are defined outside the high pressure chamber by a partition wall inside the cylinder head, a ring-shaped discharge valve and a valve holder are arranged in the high pressure chamber, one end is opened in the low pressure chamber, and the other is disposed in the high pressure chamber. A valve plate comprising a suction passage whose end opens to a suction valve and a valve plate having a discharge hole opened and closed by the discharge valve, wherein a mounting leg is formed that projects in the normal direction of the valve holder, and this mounting A compressor in which a recess for storing the legs is provided in the partition wall.