JPS6318786Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electromagnetic vibration compressor, and particularly to its resonance spring.

As shown in FIGS. 3 and 4, conventional resonant springs consist of a pair of zero pitch springs (1
It is composed of a combination of turn-only springs a), and in order to ensure safety in terms of life, the external dimension A has to be large, and the shape of the closed container is regulated by the shape of the resonant spring a. In addition, b is a movable iron core, c is a fixed iron core, d is a cylinder, and e is a piston.

The present invention provides a resonant spring for an electromagnetic vibration compressor which eliminates the above-mentioned drawbacks and which is safe in terms of life and which minimizes the effective area occupied by the spring in order to reduce the size and weight of the compressor.

An embodiment of the present invention will be described below. 1st
The figure shows a horizontal electromagnetic vibration compressor, and reference numeral 1 denotes a main body of the electromagnetic vibration compressor, which is elastically supported within a closed container 2 by a spring (not shown). The main body 1 is equipped with a cylinder 5 on the left side and a bearing 6 on the right side, with a fixed winding core 4 having an air wound around an electromagnetic coil 3 sandwiched therebetween. A hollow piston 8 to which a movable iron core 7 is fixed is slidably provided on the cylinder 5 and bearing 6. A cylinder head 10 having a discharge valve 9 is fixed to the end of the cylinder 5. Further, an outer resonance spring 11 (hereinafter simply referred to as an outer spring) and an inner resonance spring 12 (hereinafter simply referred to as an inner spring) are provided between the movable iron core 7 and the bearing 6.

The outer diameter of the outer spring 11 is larger than that of the inner spring 12, and both springs 11 and 12 have one turn, and mounting portions 11a and 11b are bent at a substantially right angle on or near the circumference and extend in opposite directions. ,1
It has 2a and 12b. In addition, each mounting portion 11a, 1
1b, 12a, and 12b are arranged at an interval of 180°. The spring constant of the outer spring 11 is K ₁₁ , the spring constant of the inner spring 12 is K ₁₂ , and each mounting portion 11a, 11b, 12a, 12 from the piston center p
Letting the distances of b be X and Y, the relationship is K ₁₁ X=K ₁₂ Y. That is, each spring 11, 12
This is to ensure that the moment due to the spring reaction force is the same at the center of the piston, thereby preventing piston pitching and one-sided sliding of the piston.

In such a configuration, the AC power source is half-wave rectified,
By passing a current through the electromagnetic coil 3 wound around the stator 4, the movable core integrated with the hollow piston 8 is attracted in the direction of the magnetic poles of the stator 4 according to the magnetic variable resistance principle, and when attracted, the movable core 7 and the bearing 6 The elastic force stored in the outer and inner springs 11 and 12 in between pushes it in the opposite direction, and this repetition causes it to vibrate back and forth.

Furthermore, during this vibration, the difference in moment that occurs due to the attachment of the springs 11 and 12 is made equal by changing the spring constant of each spring 11 and 12, so that pitching of the piston 8 is prevented and the piston 8
It is possible to prevent one side slippage and a decrease in efficiency.

As described above, in the present invention, an inner resonant spring and an outer resonant spring are arranged between a piston and a bearing, coaxially with the piston and having attachment parts extending in opposite directions, and the spring constant of the inner resonant spring is K ₁₂ and the outer resonant spring is When the spring constant of the resonant spring is K ₁₁ , the distance between the outer resonant spring mounting part and the shaft center is X, and the distance between the inner resonant spring mounting part and the shaft center is Y, then K ₁₁ ×X=K ₁₂
xY relationship, it is possible to downsize the spring without increasing the spring diameter as in the conventional case, and by keeping the spring constant and the dimensions of the mounting part in the above relationship, piston pitching can be prevented. It is possible to prevent one-sided slippage, etc.

[Brief explanation of drawings]

Fig. 1 is a central vertical sectional view showing an embodiment of the electromagnetic vibration compressor of the present invention, and Fig. 2 is a -' of Fig. 1.
3 is a partial perspective view, FIG. 4 is a sectional view showing a conventional compressor, and FIG. 5 is a cross-sectional view along the line shown in FIG.
FIG. 8... Piston, 11... Outer resonance spring, 12
...Inner resonance spring.

Claims (1)

[Scope of utility model registration request] If there are mounting parts extending in opposite directions between the piston and the bearing, and the spring constants are K ₁₁ and K ₁₂ respectively, the outer resonance spring and the inner resonance spring are arranged concentrically with the piston, and the outer resonance spring is arranged concentrically with the piston. An electromagnetic vibration compressor characterized by having _a relationship such as K ₁₁ x