Solenoid valves, throttling devices and refrigeration units

Abstract

The invention discloses a solenoid valve, comprising: a valve seat, an inlet pipe and an outlet pipe fixed by the valve seat, the inlet pipe and the outlet pipe are connected by the inner cavity of the valve seat, and a throttling valve is arranged in the inner cavity part, and sealing head; the throttling part has a side wall that matches the inner cavity, and the throttling part is also provided with a valve port that is used to cooperate with the sealing head to seal, and there is also a main connection between the inner cavity and the outlet pipe Passage; the throttling member is provided with a groove that spirally surrounds the outer surface of its side wall and is recessed from the outer surface, the groove has a first end that communicates with the inner cavity and passes through the throttling passage and the main passage The groove is connected with the second end, and the sound-absorbing component is embedded in the groove. Correspondingly, the invention also discloses a throttling device and a refrigeration device. The throttling device in the solenoid valve disclosed by the invention has a long sound-absorbing path, and can fully absorb the noise of refrigerant flow.

Description

technical field [0001] The invention relates to the technical field of solenoid valves, in particular to a solenoid valve, a throttling device and a refrigeration device in the solenoid valve. Background technique [0002] Solenoid valves are widely used in hydraulic, vacuum, gas transmission and refrigeration systems, and play an important role in realizing automatic control of pipelines. [0003] A normally open solenoid valve in a dehumidifying non-cooling air conditioner is a solenoid valve that can pass a medium flow (such as refrigerant) even in the closed valve state, and the medium flow rate is smaller than that in the open valve state, so it usually works to the throttling effect. For example, in a dehumidification air conditioner, a solenoid valve is used to connect two indoor heat exchangers. This type of air conditioner removes water vapor from the indoor air without lowering the temperature, so it is also called a dehumidification without cooling air conditione...

AI Technical Summary

Problems solved by technology

[0008] However, the sound-absorbing effect of the throttling member 22 and the sound-absorbing member 23 is not ideal, because the sound-absorbing member 23 surrounds the side wall of the lower cylinder 222 and is limited by the space of the inner cavity of the valve, so the axial height of the sound-absorbing member 23 is limited. , so the distance that the refrigerant flows in the sound-absorbing part 23 is relatively short, and the effect of the sound-absorbing part 23 in absorbing the flow noise of the refrigerant is relatively poor; in addition, the refrigerant flows out from the inflow hole 2210 into the groove 2211, and then evenly flows into the ring-shaped sound-absorbing part 23 , but the sound-absorbing part 23 is made of wire mesh or porous material. If the density of the pores inside it is not uniform, the refrigerant will flow along the looser part, and the ring-shaped sound-absorbing part cannot be fully utilized, thus further weakening the sound-absorbing effect.

Images