KR200167996Y1 - Solenoid valve in refrigerant control device - Google Patents

Abstract

The present invention is characterized in that in the refrigeration cycle the solenoid valve to control the flow of the refrigerant, a shock absorbing member that can mitigate the impact sound on the part of the contact surface between the fixed iron core and the plunger is mounted.

According to the present invention configured as described above, the moment the plunger contacts the fixed core when the solenoid valve is operating, the shock absorbing member can reduce the noise by absorbing the impact of the plunger.

Description

Solenoid Valve of Refrigerant Control Device {SOLENOID VALVE IN REFRIGERANT CONTROL DEVICE}

The present invention is to reduce the impact sound to a part of the contact surface between the fixed iron core and the plunger in the device for controlling the flow of the refrigerant by the solenoid valve in the refrigeration cycle.

Conventionally, when a solenoid valve for controlling the flow of refrigerant in a refrigeration cycle such as a refrigerator or an air conditioner operates, a shock sound generated when the fixed iron core and the plunger are in contact with each other causes a user to be uncomfortable. In particular, when used in the home, the noise of the solenoid valve which operates intermittently at night, which is sensitive to relatively small noise, also acts as a factor that disturbs sleep. In order to reduce this noise, the entire solenoid valve inside the product is covered with a sound insulating material or a sound absorbing material to reduce the amount of noise emitted from the solenoid valve to the outside. However, this method acted as a factor to increase the cost and assembly time due to the use of sound insulation and sound absorbing materials. In addition, the material used as a sound insulation material is usually difficult to disassemble because it is sticky.

It will be described in detail with reference to FIG.

1 shows an assembled cross-sectional structure of a conventional solenoid valve. First, the configuration and operation relationship of the solenoid valve will be described. The valve body 9 of the solenoid valve is composed of an input port 17, an output port 12, and a refrigerant passage 10, and a solenoid is formed on the valve body 9. The solenoid coil 2, the fixed iron core 4, the coil spring 5, the plunger 6, and the plunger guide 7, which are coupled to the inside of the housing 1 of the solenoid, are connected to the controller. 5) The plunger 6 axially seals the valve port 11 in contact with the valve seat 14, which is the upper end of the output port 12, with the packing 15 of the milling plunger closing the solenoid coil. When power is supplied and excited, the plunger 6 is driven from the closed position to the open position against the elasticity of the coil spring 5, and the packing 15 is released from the valve seat 14 to open the valve port 11. do. By the way, when the plunger 6 is driven from the closed position to the open position, the impact sound is generated on the surfaces 6a and 4-a in contact with the fixed iron core.

An object of the present invention is to mitigate the impact and impact sound between the fixed iron core and the plunger that occurs when the solenoid valve is operated in a refrigeration cycle.

1 is an assembled cross-sectional structure of a conventional solenoid valve

2 is a cross-sectional structure of the solenoid valve of the first embodiment of the present invention

2-1 is an enlarged sectional view showing main parts of the first embodiment.

3 is an enlarged cross-sectional view of main parts of the solenoid valve of the second embodiment of the present invention;

4 is an enlarged cross-sectional view of main parts of the solenoid valve of the third embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: housing 2: solenoid coil

4: fixed core 4-a: contact surface of fixed iron core with plunger

5: coil spring

6: Plunger 6-a: contact surface with fixed core of plunger

20, 21, 22: shock absorbing member

The present invention is a device for controlling the flow of the refrigerant by the solenoid valve in the refrigeration cycle, by providing a means for fixing the shock absorbing member (20, 21, 22) between the fixed iron core (4) or the plunger (6) Refrigerant control device characterized in that the absorption member is provided.

Next will be described in more detail with reference to Examples.

Figure 2 shows a first embodiment of the present invention, provided with a groove for mounting the shock absorbing member 20 on the center of the contact surface (4-a) with the plunger of the fixed iron core (4) Insert a shock absorbing member 20, such as soft rubber, into the center of the lower end of the shock absorbing member is compressed by the coil spring (5), but the periphery thereof is more than the contact surface (4-a) of the plunger of the fixed core (4) When the power is supplied to the solenoid coil and configured to protrude, the plunger 6 is driven from the closed position and moved to the open position. After 20) a certain amount of deformation, the upper surface 6a of the plunger is brought into contact with the contact surface 4a of the fixed iron core. Here, the periphery of the shock absorbing member 20 shown in FIG. 2 is shaped like a ridge, such as 'V', for the purpose of sequential shock absorption. Reference numeral 4-b is a portion protruding the central portion of the fixed iron core so that the shock absorbing member 20 is not detached while in position.

This primarily absorbs the impact between the plunger 4 and the fixed iron core 6, thereby alleviating the impact sound.

3 shows another embodiment of the present invention. Except for the main part, the basic configuration is the same as that of FIG. Insert a hard 'T' type shock absorbing member 21 by making a groove in the center of the contact surface 4-a of the fixed iron core 4 with the plunger, but the upper part of the upper portion of the shock absorbing member 21 is fixed iron core 4. Of the upper surface of the plunger (6-a) at the moment when the power is supplied to the solenoid coil and the plunger 6 is driven from the closed position to the open position. The center portion is first contacted with the shock absorbing member to absorb the shock while the shock absorbing member is deformed by a certain amount, so that the upper surface (6-a) of the plunger is in contact with the contact surface (4-a) of the fixed core. Here, reference numeral 21-a guides the spring 5 to the lower portion of the shock absorbing member 21 and serves to prevent the shock absorbing member 21 from being separated by the spring force.

4 shows another embodiment of the present invention. Except for the main part, the basic configuration is the same as that of FIG. By inserting a shock absorbing member 22, such as a rubber ring, by making an annular groove in the center of the contact surface 4-a of the fixed iron core 4 with the plunger, power is supplied to the solenoid coil so that the plunger 6 At the moment of driving from the closed position to the open position, first, the central portion of the upper surface (6-a) of the plunger first touches the shock absorbing member to absorb the shock and deforms the shock absorbing member a predetermined amount, and then the upper surface of the plunger (6-a) This is in contact with the contact surface 4-a of the fixed iron core. This primarily absorbs the impact between the plunger 4 and the fixed iron core 6 and mitigates the impact sound.

In the three embodiments, the fixing means of the shock absorbing members 20, 21, 22 includes all means for fixing the soft or hard shock absorbing member to the plunger in addition to the means for inserting the groove into the plunger 4.

As described above, the moment when the plunger contacts the fixed core when the solenoid valve is operating, the shock absorbing member absorbs the shock, thereby reducing noise. In addition, this can eliminate the use of sound insulation and sound absorbing materials that have been used in the past to reduce the noise generated in the solenoid valve, resulting in cost savings and reduced assembly time.

Claims (5)

An apparatus for controlling a flow of refrigerant by a solenoid valve in a refrigeration cycle, the apparatus comprising: a means for fixing the shock absorbing member to a fixed iron core or a plunger, wherein the shock absorbing member is mounted. The refrigerant control device according to claim 1, wherein the fixing means of the shock absorbing member is provided with a groove in the center of the fixed iron core or the plunger. The refrigerant control device according to claim 1, wherein the fixing means of the shock absorbing member provides an annular groove in a fixed iron core or a plunger, and the shock absorbing member is a rubber ring, and a rubber ring is inserted into the annular groove. The refrigerant control device according to claim 1 or 2, wherein a central portion of the fixed iron core protrudes. The refrigerant control device according to claim 1 or 2, wherein the impact absorbing member has a 'T' shape.