Electromagnetic valve

Abstract

The invention discloses an electromagnetic valve, comprising a throttle holder (2) with a central cooling medium passage (21) and a throttle cooling medium passage independent from the central coolingmedium passage (21), wherein a noise damping passage of the throttle cooling medium passage is provided with noise damping blocks and extends along the circumferential direction of the throttle holder (2). The noise damping passage extends along the circumferential direction of the throttle holder (2), and cooling mediums can really flow along the circumferential direction of the throttle holder(2) so that the cooling mediums can flow to each part of the noise damping blocks so as to obviously enhance the utility ratio of the noise damping blocks, thereby the invention realizes the better noise damping effect; in addition, the utility ratio of the noise damping blocks is higher, and the volume of the noise damping blocks can be further reduced, thereby the invention is also beneficial tothe miniaturization of the electromagnetic valve and reduce the cost of the electromagnetic valve.

Description

technical field [0001] The invention relates to the field of control valves, in particular to an electromagnetic valve with the function of silencing and throttling. Background technique [0002] Solenoid valves with throttling and noise reduction functions are widely used in dehumidifying non-cooling air conditioners to connect two independent evaporators located indoors. [0003] Most of the above solenoid valves are normally open, and they only serve to connect pipelines in the non-dehumidification state; in the dehumidification state, the above solenoid valve is energized, and its valve core closes the valve port under the action of electromagnetic force, and the refrigerant can only come from The throttling channel passes through, so it plays the role of throttling; at the same time, a noise reduction device is also installed in the throttling channel to reduce noise. [0004] The above-mentioned functions of noise reduction and throttling are mainly realized by the no...

AI Technical Summary

Problems solved by technology

In fact, the movement of the refrigerant in the above-mentioned prior art during the silencing process can be decomposed into a vertically downward sub-movement and a centripetal sub-movement along the radial direction of the silencing block 12; Larger cause flow is not apparent

[0013] Therefore, the part of the sound-absorbing block 12 located between the refrigerant outlet holes 115 actually rarely flows through the refrigerant, and this part of the structure of the sound-absorbing block 12 does not have a sound-absorbing effect; this will obviously lead to a lower utilization rate of the sound-absorbing block 12, and the sound-absorbing less effective

In order to achieve a better noise reduction effect, the noise reduction block 12 must have a larger height and width, which will significantly increase the volume of the entire solenoid valve, which is not conducive to the miniaturization of the solenoid valve; of course, due to the consumption of more raw materials, The cost of the sound-absorbing throttling device 1 and the solenoid valve will also increase significantly

[0014] In addition, in the above-mentioned prior art, the sound-absorbing block 12 is set on the outside of the throttling seat 11, and its volume is relatively large, and its manufacturing cost is relatively high.

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