JPS62186071A - Compressor - Google Patents

Abstract

PURPOSE:To protect a compressor having a piston fitted slidably in a container movable up and down reliably from damage by providing means for making constant the minimum volume of an enclosed space defined by the piston. CONSTITUTION:A cylinder 23 is fitted slidably in a frame 22 supported on a base 19 through supporting springs 20, 21 and coupled through a coupling rod 39 to a crank shaft 25 which is rotated by a motor. A piston 24 is fitted slidably in the cylinders 23 so as to define the compression chambers 30, 31 vertically therein, and suction valves 28, 29 and delivery valves 32, 33 are arranged while facing against the respective compression chambers 30, 31. When a crank shaft 36 is fixed to the cylinder 23 and a shaft 38 is fixed to the piston 24, in such an arrangement, then both shafts 36, 38 are coupled through a coupling rod 37, the collision between the piston 24 and the cylinder 23 is prevented and the volume of gap can be maintained at the minimum constant value continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to compressors, and more particularly to inertial compressors.

Prior Art A conventional compressor of this type had a structure as shown in FIG. Reference numeral 1 designates a frame supported on support springs 3 and 4 on a base 2, 6 a cylinder slidably provided on the frame 1, and 6 a free piston provided slidably in the cylinder 6. .

7 is a crankshaft rotatably attached to the frame and rotated by a motor; 8 is a crankshaft 7 and a cylinder 6;
Connecting rod installed across. 9.10 is a low pressure gas flow path, 11.12 is an intake valve, 13.14 is a compression chamber, 16.16 is a discharge valve, and 17.18 is a high pressure gas flow path.

Next, the effect will be explained. The cylinder 5 is a motor, and the crankshaft 7. It is moved up and down by the connecting rod 8. By the way, the free piston 6 has a sufficiently large mass so that it hardly moves relative to the base 2. Therefore, when the cylinder 6 moves up and down, the distance between the cylinder 6 and the free piston 6 increases or decreases. When the cylinder 6 moves up, the volume of the compression chamber 13 increases, the suction valve 11 opens, and the flow path 9
Low pressure gas flows into the compression chamber 13 throughout. When the cylinder 5 further descends past the top dead center, the suction valve 11 closes.
When the pressure drops further, the discharge valve 16 opens and the high pressure gas flows out through the flow path 17.

On the other hand, as the cylinder 6 moves up and down in the same way.

Channel 10. Low pressure gas entering compression chamber 14 through suction valve 12 becomes high pressure gas and exits through discharge valve 16 and passage 18.

Problems to be Solved by the Invention However, such a structure has the following problems. In other words, in such a positive displacement compressor, the smaller the volume of the compression chamber 13 when the volume of the compression chamber 13 is the smallest (hereinafter referred to as the gap volume), the higher the volumetric efficiency becomes. .

Therefore, the insulation efficiency is generally high, and the same applies to the compression chamber 14.

Therefore, during operation, the number of revolutions of the crankshaft 7, the pressure of the flow paths 9, 10, 17.18, etc. are adjusted so that the gap volume of the compression chambers 13.14 is made as small as possible.

However, if the operation is performed with the gap volume too small, the gap volume will fluctuate due to a slight disturbance, such as a change in pressure in the flow paths 9, 10, 17 and 18, and if the gap volume becomes too small, the cylinder 6 and free piston 6 will It may collide and be destroyed.

Therefore, the gap volume is made large so that it will not collide even if there is a total disturbance. As a result, the volumetric efficiency of the compressor is reduced, and the adiabatic efficiency is also reduced.

Means for solving the problems and technical means of the present invention for solving the above problems are as follows:
This compressor suppresses the operating range of the piston moving within the cylinder, thereby keeping the minimum volume of the closed space formed by the piston and cylinder constant.

action The effect of this technical means is as follows.

That is, the minimum volume of a closed space is kept constant.

Equipment damage is prevented.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, 22 is a support spring 20 on the base 19.
．． Frame A supported on 21, 23 is frame 2
2 is a cylinder slidably provided, and 24 is a piston slidably provided in the cylinder 23. A crankshaft 26 is rotatably attached to the frame 22 and rotated by a motor, and a connecting rod 39 is attached between the crankshaft 26 and the cylinder 23. 26゜2
7 is a low-pressure gas flow path, and 28.29 is a suction valve.

30.31 is the compression chamber, 32.33 is the discharge valve, 34°36
is a high-pressure gas flow path. 36 is a crankshaft attached to the cylinder 23, and 37 is a connecting rod attached across the crankshaft 36 and a shaft 38 attached to the piston 24.

Next, the effect will be explained. The cylinder 23 is a motor, and the crankshaft 25. It moves up and down by the connecting rod 39. By the way, the piston 24 has a sufficiently large mass,
It is designed so that it hardly moves relative to the base 19.

Therefore, when the cylinder 23 moves up and down, the cylinder 23
The distance between the piston 24 and the piston 24 increases or decreases. When the cylinder 23 is raised, the volume of the compression chamber 310 increases, the suction valve 29 opens, the flow path 27 is completely passed through, and low-pressure gas flows into the compression chamber 31.

Further, when the cylinder 23 goes down past the top dead center, the suction valve 2
9 closes, and when it drops further, the discharge valve 33 opens and the flow path 36
High pressure gas flows out all the way through.

On the other hand, as the cylinder 23 moves up and down in the same manner.

Channel 26. The low-pressure gas that enters the compression chamber 3o through the suction valve 28 becomes high-pressure gas and flows out through the discharge valve 32 and the flow path 34.

By the way, in this embodiment, the crankshaft 36 . Connecting rod 37, shaft 38
is provided.

Therefore, the piston 24 and the cylinder 23 do not collide with each other, and furthermore, the operation can be performed with the gap volume always kept at a minimum and constant. Therefore, it is possible to achieve high volumetric efficiency and high heat insulation efficiency.

Effects of the Invention The present invention provides a container, a means for moving the container, a member provided to slidably move on the inner wall of the container to form a closed space whose volume changes together with the container, and a member for moving the container. Since the compressor is equipped with a means for keeping the minimum volume constant, a flow path communicating the closed space with the outside of the container, a suction valve, and a discharge valve, the volumetric efficiency and adiabatic efficiency are high.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a compressor according to an embodiment of the present invention. FIG. 2 is a sectional view of a conventional compressor. 22... Frame, 26... Crankshaft, 23... Cylinder, 24... Piston, 36... Crankshaft, 28.29 ...
...Suction valve, 32.33...Discharge valve. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 7q Doai

Claims (2)

[Claims] (1) a container, a means for moving the container, a piston provided to slidably move on the inner wall of the container to form a closed space whose volume changes with the movement of the container; A compression device comprising means for keeping the minimum volume of the space constant, a flow path communicating the closed space with the outside of the container, and a suction valve and a discharge valve provided between the closed space and the flow path. Machine. (2) The container is a cylinder, and the cylinder moves up and down within the container, and within the cylinder, a connecting rod fixed to the cylinder is connected to a crankshaft pivotally supported by the cylinder, and the connecting rod is connected to the piston. The compressor according to claim 1, characterized in that the minimum value of the compression chamber formed by the cylinder is constant.