KR20020009687A - Solenoid valve of heat exchanger - Google Patents

Abstract

PURPOSE: A solenoid valve of a heat exchanger is provided to make operation of a plunger driving inside a cylinder of the solenoid valve smooth and to prevent noise and vibration due to the operation of the plunger. CONSTITUTION: A solenoid valve of the heat exchanger includes a valve body having an inlet and an outlet, a cylinder on which a coil is wound, an elastic part(7) mounted inside the cylinder, a plunger mounted inside the cylinder, a working gap formed between the cylinder and the plunger, a double spring(9) forming the elastic part. The spring has an upper diameter larger than a lower diameter of the spring. The spring is divided into an upper spring mounted on an upper surface of the plunger and a lower spring inserted into an insertion hole of the plunger.

Description

Solenoid Valve of Heat Exchanger {SOLENOID VALVE OF HEAT EXCHANGER}

The present invention provides a heat exchanger having a condenser connected to one compressor and a plurality of evaporators connected thereto, and having a solenoid valve for supply of refrigerant between the condenser and the evaporators, wherein the solenoid valve is operated when the solenoid valve is operated. The present invention relates to a solenoid valve of a heat exchanger having a double elastic part having a different diameter so as to smoothly operate a plunger operating in a cylinder of the cylinder and to prevent noise and vibration caused by the operation of the plunger.

Conventionally, the inside of a vehicle is provided with an air conditioning system that is a cooling device for cooling, the air conditioning system is composed of an evaporator, a condenser and a compressor, the condenser is to discharge heat to the outside while condensing, by a compressor Compressed refrigerant is sucked into the evaporator unit through the condenser, and the sucked refrigerant absorbs heat from the outside air to evaporate to lower the air and supply the lowered air to the interior of the vehicle by using a blower. It was composed.

In addition, in order to improve the cooling efficiency, a single condenser or a double condenser is installed in one compressor, and a receiver dryer and a solenoid valve are connected to the condenser, and a plurality of evaporators configured for front and rear are connected to the condenser. The refrigerant compressed in the compressor was selectively supplied to the multiple evaporators via the condenser, the receiver dryer, and the solenoid valve, thereby performing heat exchange.

However, in the cooling cycle as described above, the evaporators operate only one of the evaporators as needed. When the one of the evaporators is operated, the high-temperature, high-pressure refrigerant is left in the other evaporators. The icing phenomenon, which is a freezing phenomenon, is generated, and the icing phenomenon prevents the refrigerant from being returned to the compressor from smoothly returning, and a hydraulic phenomenon occurs in the compressor, causing damage to the refrigerant pipe or the compressor due to the hydraulic pressure. Therefore, the operation of the solenoid valve for selectively supplying the refrigerant to the evaporators is very important.

On the other hand, the solenoid valve operated as described above is installed in the valve body 1, the inlet (2) and the outlet (3) is formed as shown in Figure 1, the coil 4 is wound around the cylinder (4) and the cylinder (4) ) Was constructed by installing a plunger 6 in a state in which an elastic part 7 made of a spring is interposed. When a power is applied to the coil 5, a magnetic force is generated to make the plunger 6 elastic. When pressing the portion (7) to move into the working gap (8) to open the inlet (2) and the outlet (3) and to cut off the power applied to the coil (5), the shot of the elastic portion (7) As the plunger 6 is returned by the force, the inlet 2 and the outlet 3 are closed to block the flow of the refrigerant.

However, the conventional elastic portion in the solenoid valve configured and operated as described above is provided with a spring 701 having the same diameter between the plunger 6 and the cylinder 4 as shown in FIG. The shock generated during operation of the plunger 6 could not be fully buffered, and there was a problem such that noise was generated along with the vibration due to the shock.

The present invention has been made in view of the above-mentioned problems in the related art. The present invention provides a condenser connected to one compressor and a plurality of evaporators connected thereto, and a solenoid valve for supplying a refrigerant between the condenser and the evaporators. In the heat exchanger having a, the double elastic portion having a different diameter to facilitate the operation of the plunger operating in the cylinder of the solenoid valve during operation of the solenoid valve and to prevent noise and vibration caused by the operation of the plunger It is to provide a solenoid valve of the heat exchanger provided, it will be described in detail based on the accompanying drawings as follows.

1 is a configuration diagram showing a general solenoid valve structure

Figure 2 is a block diagram showing the structure of the elastic portion of the conventional solenoid valve

Figure 3 is an extract showing the structure of the elastic portion of the embodiment of the present invention

4 is an extract showing another embodiment of FIG.

Explanation of symbols on the main parts of the drawing

1: Valve body

2: entrance

3: exit

4: cylinder

5: coil

6: plunger

7: elastic part

8: working gap

9: double spring

901: upper spring

902: lower spring

A cylinder 4 having a coil 5 wound around the valve body 1 having the inlet 2 and the outlet 3 formed therein is provided with an elastic part 7 formed of a spring inside the cylinder 4. In the solenoid valve in which the plunger 6 is installed in a state and an operation gap 8 is formed between the cylinder 4 and the plunger 6, the elastic portion 7 is formed by a double spring 9. It is configured, but the upper diameter of the spring 9 is configured to be larger than the lower diameter.

In addition, the spring is separated into two, as shown in Figure 4, the upper spring 901 is larger than the diameter of the lower spring 902, the lower spring 902 is inserted into the insertion hole of the plunger 6 Installed so that the upper spring 901 is to be configured to be installed on the upper surface of the plunger (6).

According to the present invention constituted as described above, when power is applied to the coil 5 installed in the valve body 1 in which the inlet 2 and the outlet 3 are formed, the cylinder 4 is formed by the magnetic force of the coil 5. Plunger 6 installed in the) is operated in the space of the working gap 8 while pressing the elastic portion 7 made of a spring to open the inlet (2) and outlet (3), applied to the coil (5) When the power is cut off, the magnetic force is lost and the plunger 6 returns to the elastic force of the elastic part 7 formed of the spring 9, and the inlet 2 which has been opened in accordance with the return of the plunger 6 is returned. And the outlet 3 are closed again to control the flow of the refrigerant.

As described above, when the plunger 6 installed in the cylinder 4 operates in the working gap 8, the elastic part 7 is composed of a double spring 9, and the upper part of the spring 9 is provided. Since the diameter is formed to be larger than the lower diameter, the shock and vibration of the plunger 6 can be buffered in two stages by the elastic part 7 of the double structure, and the solenoid by the two-stage buffering action. Absorb vibration and noise according to the operation of the valve.

In addition, the spring is separated into two, as shown in Figure 4, the upper spring 901 is larger than the diameter of the lower spring 902, the lower spring 902 is inserted into the insertion hole of the plunger 6 If installed, the upper spring 901 is configured to be installed on the upper surface of the plunger 6 has the same function as above, it is possible to facilitate the assembly workability according to the structure.

As described above, the present invention provides a solenoid valve for selectively supplying refrigerant to evaporators of a heat exchanger having multiple evaporator structures as described above, wherein the solenoid valve is formed of a spring having a double structure elastic member (7). It is possible to buffer the operating shock of the plunger 6 operating in the cylinder (4), and to absorb the vibration and noise in addition to the buffering action can be longer the life of the solenoid valve It has features such as smooth operation of solenoid valve.

Claims (2)

A cylinder 4 having a coil 5 wound around the valve body 1 having the inlet 2 and the outlet 3 formed therein is provided with an elastic part 7 formed of a spring inside the cylinder 4. In the solenoid valve in which the plunger 6 is installed in a state and an operation gap 8 is formed between the cylinder 4 and the plunger 6, the elastic portion 7 is formed by a double spring 9. The solenoid valve of the heat exchanger, characterized in that the upper diameter of the spring (9) is configured to be larger than the lower diameter. According to claim 1, wherein the spring of the elastic portion is formed in two separate, the upper spring 901 is larger than the diameter of the lower spring 902, the lower spring 902 is inserted into the insertion hole of the plunger 6 It is installed to be inserted, the upper spring (901) is a solenoid valve of the heat exchanger, characterized in that configured to be installed on the upper surface of the plunger (6).