JPH0441264Y2 - - Google Patents

Description

[Detailed description of the invention] The purpose of this invention is to prevent the high heat generated by the outflow of compressed air from being transferred from the discharge side to the suction side in the cylinder head of an air compressor. It has been done.

Generally, an air compressor compresses air sucked in from the outside, converts it into high pressure, and sends it to the load side.

In a conventional air compressor, a cylinder head 3 is mounted on a valve seat plate 2 attached to the top of a cylinder 1, as shown in FIG. The cylinder head 3 was integrally molded from cast iron, and had a generally rectangular box-shaped interior partitioned by a single partition wall to form a discharge chamber 4 and a suction chamber 5.

When this air compressor is operated, the inside of the discharge chamber 4 is heated by the high heat of the discharged air, and this heat is directly transferred to the air in the suction chamber 5 through a single partition wall of the cylinder head. In particular, in the conventional product, the suction chamber 5
Since the shape of the suction chamber 5 was a rectangular box shape,
Air stagnation was likely to occur in the upper corner portion adjacent to the discharge chamber 4 inside. Therefore, this stagnant air is heated by the heat in the discharge chamber 4 and expands, significantly reducing the compression efficiency of the compressor.

In addition, the air sucked into the cylinder 1 from the suction port 8 provided on the valve seat plate 2 becomes highly heated during the stroke in which it is compressed by the piston 9, and this highly heated air causes the lubricating oil of the piston 9 to The problem was that the carbide etc. adhered to the valves of the suction port 8 and the valve of the discharge port 10, deteriorating the operating efficiency of the valves and pistons.

In order to solve the above problems, the present invention provides an air compressor in which a valve seat plate having a suction port and a discharge port is provided on the upper part of a cylinder in which a piston moves reciprocally, and a cylinder head is provided on the valve seat plate. , the cylinder head is made of a single member in which a cooling groove is formed between a peripheral wall surrounding the suction port to form a suction chamber and a peripheral wall surrounding the discharge port to form a discharge chamber; A suction port is provided in a portion of the peripheral wall forming the chamber that is substantially perpendicular to the valve seat plate, and the upper surface of the inner wall surface of the suction chamber is arranged such that the upper surface of the inner wall surface of the suction chamber approaches the valve seat plate as it goes from the suction port to the suction port of the valve seat plate. Furthermore, the outer wall surface of the peripheral wall forming the suction chamber is inclined at substantially the same slope as the inner wall surface.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

2 to 4, the upper part of the cylinder 13 in which the piston 12 reciprocates has a suction port 2.
8. Valve seat plate 14 equipped with a discharge port (not shown), a suction valve 29 that opens and closes both ports, and a discharge valve 31
A cylinder head 18 is placed on the valve seat plate 14, and the suction chamber 15 and the discharge chamber 16 are partitioned by different peripheral walls 17 and 25, respectively, and are made of a single independently formed member. , the cylinder 13, the valve seat plate 14, and the cylinder head 18 are connected with bolts 19, 2.
0, 21, and 22 are tightened and fixed together. The peripheral wall 25 forming the suction chamber 15 of the cylinder head 18 has a curved pipe shape, while the peripheral wall 17 forming the discharge chamber 16 faces both outer wall surfaces 26a, 26b and a curved wall portion 26c of the peripheral wall 25. The parts that surround this are provided at intervals. As is clear from FIG. 2, a V-shaped cooling groove 2 is provided between both peripheral walls 25 and 17.
6 is formed.

The suction chamber 15 is provided with a suction port 24 on a wall surface perpendicular to the valve seat plate 14 . here,
The upper surface of the inner circumferential wall of the circumferential wall 25 forming the suction chamber 15 is connected from the suction port 24 to the suction port 28 of the valve seat plate 14.
The outer wall surface of the peripheral wall 25 is also inclined at almost the same slope as the inner wall surface. As a result, the distance between the peripheral wall 25 and the peripheral wall 17 forming the discharge chamber 16 can be made wider compared to the conventional one, and the cooling grooves 26 are formed larger than the conventional one.

With the above configuration, the intake port 24
The cold air from the outside is sucked into the suction chamber 15 from the suction chamber 15 without stagnation, and is smoothly sucked into the cylinder 13 through the suction port 28 by opening the suction valve 29, where it is compressed by the piston 12 and becomes a high-temperature air. The high-pressure air flows into the discharge chamber 16 through the discharge port and the discharge valve 31, and is supplied to the load side from the exhaust port 32 while colliding with or contacting the inner wall of the discharge chamber 16. Therefore, the temperature of the peripheral wall of the discharge chamber 16 increases due to the heat of the high temperature discharged air.

However, in the present invention, the suction chamber 15 and the discharge chamber 16 are divided by different peripheral walls,
Moreover, since the outer wall surface of the peripheral wall 25 forming the suction chamber 15 is inclined at almost the same slope as the inner wall surface, a cooling groove 25 larger than the conventional one can be formed between the two peripheral walls.
is formed, and the air layer existing in this cooling groove 26 not only prevents heat transfer from the peripheral wall 17, but also prevents a portion of the peripheral wall 25 that forms the suction chamber 15 of the cylinder head 18, which is substantially orthogonal to the valve seat plate 14, to prevent heat transfer from the peripheral wall 17. The suction port 24 is provided in the suction chamber 15, and the upper surface of the inner wall surface of the suction chamber 15 is inclined so as to approach the valve seat plate 14 as it goes from the suction port 24 toward the suction port 28 of the valve seat plate 14. Coupled with the fact that there is no stagnation inside, the air in the suction chamber 15 can be prevented from becoming high temperature.

As described above, in the present invention, the suction chamber and the discharge chamber are separated via the cooling groove, and the upper surface of the inner wall surface forming the suction chamber is formed on the valve seat plate as it goes from the suction port to the suction port on the valve seat plate. Since the air is slanted so that it approaches the suction port, the air introduced into the suction chamber from the suction port can be smoothly guided to the suction port without stagnation.
The compressed air is not warmed up by the heat of the discharge chamber, improving compression efficiency.

Since the outer wall surface of the peripheral wall that forms the suction chamber is inclined at almost the same slope as the inner wall surface, the cross-sectional area of the cooling groove can be expanded, which improves the conduction of heat from the discharge chamber to the suction chamber. The heat insulation effect can be further improved.

Since the cylinder head is made of a single member with cooling grooves formed between the peripheral wall forming the suction chamber and the peripheral wall forming the discharge chamber, assembly and disassembly are easy.

Since the outer wall surface of the peripheral wall forming the suction chamber is inclined at almost the same slope as the inner wall surface, the amount of material can be reduced and the weight can be reduced.

It is possible to achieve the following effects.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional air compressor, Figure 2
Figures 3 and 4 show an embodiment of the present invention, in which Figure 2 is a plan view including a partial cross section, Figure 3 is a sectional view taken along the line A--A in Figure 2, and Figure 4 is B- in Figure 2.
It shows a sectional view taken along line B. 13...Cylinder, 14...Valve seat plate, 15...
Suction chamber, 16... Discharge chamber, 18... Cylinder head, 17, 25... Peripheral wall, 23... Bent channel, 2
4...Intake port, 26...Cooling groove, 28...Suction port.

Claims (1)

[Claims for Utility Model Registration] In an air compressor, a valve seat plate having a suction port and a discharge port is provided on the upper part of a cylinder in which a piston moves reciprocally, and a cylinder head is provided on the valve seat plate. consists of a single member with cooling grooves formed between a peripheral wall surrounding the suction port to form a suction chamber and a peripheral wall surrounding the discharge port to form the discharge chamber, and forming the suction chamber of the cylinder head. A suction port is provided in a portion of the peripheral wall substantially perpendicular to the valve seat plate, and the upper surface of the inner wall surface of the suction chamber is inclined so as to approach the valve seat plate as it goes from the suction port to the suction port of the valve seat plate, and An air compressor characterized in that the outer wall surface of the peripheral wall forming the suction chamber is inclined at substantially the same slope as the inner wall surface.