KR20060072159A - A apparatus limiting of a rotor lifting for an electric expansion valve - Google Patents

Abstract

The present invention relates to a rotor lift limiting device for an electric expansion valve, comprising: a rotor support portion having a thread formed on an outer circumference thereof and screwed into a yoke on an inner side thereof; A move spring which is screwed up and down by the screw thread of the rotor receiving part and has elasticity; And a stopper fixed to the top of the rotor receiving part by caulking and limiting the rise of the moving spring, forming a thread on the outer periphery of the rotor receiving part, and applying a moving spring to move up and down along the thread. This prevents abrasion and easy installation of the rotor support and reduces noise due to friction or operation.

Electric Expansion Valve, Move Spring, Caulking, Stopper, Stop Groove

Description

A device limiting of a rotor lifting for an electric expansion valve}             

1 is an exploded perspective view showing the inside of the valve body of the conventional electric expansion valve.

2 is a perspective view of a slider of a conventional electric expansion valve.

3 is a view showing an electric expansion valve as an embodiment of the present invention.

Figure 4 is a view showing the rotor receiving portion of the electric expansion valve of the present invention.

5 is a view showing the plane, isometric, front and side of the move spring of the electric expansion valve of the present invention, respectively.

Figure 6 is a view showing the separation state of the rotor receiving portion and the move spring of the electric expansion valve of the present invention.

7 is a view showing a coupling state of the rotor receiving portion and the move spring of the electric expansion valve of the present invention.

♣ Explanation of symbols for main part of drawing ♣

100: case 120: rotor

121: magnet 125: positioning pin

130: yoke 140: rotor support

142: thread 145: indentation

149: needle 150: valve

170: stopper 172: stop piece

174: insertion hole 180: move spring

182: first fixing bar 184: second fixing bar

The present invention relates to a rotor lift limiting device of an electric expansion valve, and more particularly, an electric expansion valve which is mounted in a refrigeration cycle such as an air conditioner, a freezer or a heat pump, and is used for precise flow rate control of a refrigerant or opening and closing of a flow path. It relates to a rotor lift limiting device of.

In general, the electric expansion valve serves to convert the refrigerant in the liquid state into the gas state, the electric expansion valve is frequently operated to properly maintain the temperature control of the room. This conventional electric expansion valve has been applied to the outdoor unit mainly than the indoor unit because the operation sound is large. Therefore, the electric expansion valve for controlling the refrigerant flow rate for controlling the temperature of the room should be placed outside the room, and in addition to poor controllability such as responsiveness, the refrigerant that is expanded by the expansion valve during cooling operation and becomes low temperature It must be piped to high temperature outdoor from outdoor unit to indoor unit, and despite this heat-insulated piping, a large amount of heat escapes to outside air, which acted as a large cause of thermal efficiency deterioration.

Conventionally, electric expansion valves which are used as components of this kind of air conditioners, heat pumps or refrigerators are disclosed in Korean Patent Application Publication No. 2000-523 (Invention; Electronic Expansion Valve for Refrigeration Cycle, Applicant; Samsung Electronics Co., Ltd.). Referring to the drawings of 1, the rotary pin 543 is fixed to the mounting holes 542 formed in the rotary disk 541, the upper stopper (544a) and the lower stopper (544b) on the outer periphery of the guide cylinder 521 ) Is provided with a guide ring 544 is wound. The lower stopper 544b of the guide ring 544 is fixed to the fixing hole 544c of the outward flange 523. Furthermore, a slider ring 545 is provided to move up and down along the guide ring 544 by the forward and reverse rotation of the rotary pin 543.

On the other hand, the slider ring 545 is formed in the projection 545a is caught while rotating the rotary pin 543 in FIG. And the slider ring 545 is wound several times to have elasticity.

However, when the slider ring is moved up and down along the guide ring, the upper ringer and the lower stopper are stopped to generate noise from the electric expansion valve, thereby degrading the reliability of the product, and the slider ring continues to operate along the helical guide ring. There was a problem acting as a cause of failure because the guide ring is worn out and lost.

 An object of the present invention for solving the above problems, to form a screw thread on the outer periphery of the rotor support, by applying a move spring to move up and down along the thread to prevent wear and easy installation of the rotor support, The purpose of the present invention is to provide a rotor lift limiting device for an electric expansion valve that increases durability by reducing noise due to friction and operation.

In addition, it is another object to integrally form a stop groove that restricts the movement of the move spring to the rotor support portion to improve assembly and manufacturability, and to prevent the move spring from falling from the rotor support portion while descending. .

As a means for achieving the above object, the rotor lift limiting device of the electric expansion valve according to the present invention in the electric expansion valve,

Rotor receiving portion is formed on the outer periphery, screwed and coupled to the yoke inside;

A move spring which is screwed up and down by the screw thread of the rotor receiving part and has elasticity; And

It is characterized in that it comprises a stopper fixed to the upper end of the rotor receiving portion by calking (calking), limiting the rise of the move spring.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the rotor lift limiting device of the electric expansion valve according to an embodiment of the present invention.

3 is a view showing an electric expansion valve as an embodiment of the present invention.

First, the valve body 150 of the electric expansion valve of the present invention is connected to the valve chamber 151 with the fluid outlet, ie, the refrigerant outlet inlets 152 and 153 through which the refrigerant flows in and out, and the fluid flows into the valve chamber 151. The adjusting orifice 155 is formed. And the upper end of the needle 149 for opening and closing the orifice 155 is coupled to the yoke 130 by the bush 124, the yoke 130 is bonded to the inside of the magnet 121. A plurality of through holes 123 are formed in the magnet 121, and the position fixing pin 125 is provided in the through holes 123. The yoke 130 is screwed with the rotor receiving portion 140, the rotor receiving portion 140 has a thread 142 is formed on the outer circumference.

The rotor 120 composed of the magnet 121 and the yoke 130 is covered with a case 100. The stator is fixed to the outside of the case 100 by the fixing means 160.

On the other hand, the rotor receiver 140 and the yoke 130 screwed in the present invention, and the magnet 121 bonded to the yoke 130 is rotated forward and reverse by the stator rotor receiver 140 Ascending and descending through the inside of. At this time, the needle 149 fixed in the yoke 130 also moves up and down along the lifting and lowering of the rotor 120. The flow rate of the refrigerant can be controlled by opening and closing the orifice 155 of the valve chamber 151 by raising and lowering the needle 149.

Furthermore, according to the present invention, the screw thread 142 is formed on the outer circumference to limit the elevation of the needle 149 by the forward and reverse rotation of the rotor 120, the rotor screwed with the yoke 130 on the inside A move spring 180 having elasticity that is screwed up and down is applied to the thread 142 of the receiving part 140.

3 illustrates a rotor receiver of the electric expansion valve, and a ring-shaped stopper 170 is fixed to the upper end of the rotor receiver 140 by caulking. The stopper 170 has an insertion hole 174 formed at the upper end of the rotor receiver 140, and is provided with a stop piece 172 protruding outward from the outer periphery of the stopper 170 and bent downward.

That is, after the stopper 170 is inserted into the upper end of the rotor receiver 140, the end of the rotor receiver 140 is crimped by caulking so that the stopper 170 is fixed to the upper end of the rotor receiver 140. Then, the stop piece 172 formed on the outer circumference of the stopper 170 is bent downward and fixed between the threads 142.

And the bottom flange 144 of the rotor receiving portion 140 is provided with a stop groove 146, the lower end is formed with a press-in portion 148 is press-fitted and fixed to the valve body 150, needle 149 The guide hole 145 through which () passes is formed. The rotor receiving part 140 may be hard nickel (Ni) plating or hard titanium (Ti) plating or hard nickel or titanium coating to minimize the wear caused by friction with the move spring (180). It's good to be able to.

Move spring 180 is formed as shown in the plane, isometric, front and side of Figure 4, it is coupled between the threads 142 of the rotor receiver 140. The move spring 180 is a delta (δ) -type move spring having elasticity, and preferably, the move spring 180 is wound about one time around the thread 142. That is, the move spring 180 is provided with a first stop bar 182 and a second stop bar 184, both ends of which are bent horizontally in a state of being wound more than 360 °. In addition, as shown in FIG. 8, the move spring 180 may be provided with a first stop bar 182 and a second stop bar 184 both ends of which are bent horizontally in a state of being wound less than 360 °.

Therefore, according to the present invention, it is preferable that the shape between the first fixing bar 182 and the second fixing bar 184 provided at the end of the move spring 180 is spaced apart.

In the rotor lift limiting device of the electric expansion valve of the present invention having such a configuration, first, the rotor provided inside the case 100 is rotated by an electrical signal applied to the stator. At this time, when the magnet 121 of the rotor 120 rises in the rotational motion, the yoke 130 rises from the screw receiving part 140 coupled to the screw, and the needle 149 rises of the yoke 130. As it rises, the orifice 155 of the valve chamber 151 is opened. At this time, the first stop bar of the move spring 180 wound around the screw thread 142 of the rotor receiving part 140 while the position fixing pin 125 fixed to the through hole 123 of the magnet 121 rotates ( 182 to rotate it. The move spring 180 rotates and rises, and when the rotor 120 reaches the lift limit position, the second stop bar 184 of the move spring 180 fits the stop piece 172 of the stopper 170. Touched and stopped. At this time, the move spring 180 serves to buffer the rotational force applied by the position fixing pin 125 by elasticity.

In addition, when the rotor 120 reverses and descends, the yoke 130 descends while rotating inwardly of the threaded rotor receiver 140, and at the same time the needle 149 descends simultaneously. do. As the needle 149 descends, the orifice 155 of the valve chamber 151 is closed, and the flow rate of the refrigerant flowing in and out is restricted. At this time, while the position fixing pin 125 fixed to the magnet 121 of the rotor 120 rotates, the move spring 180 of the rotor receiving part 140 is rotated and lowered, and the move spring 180 continues. While descending, the second stop bar 184 is engaged with the stop groove 146 formed in the flange 144 of the rotor support 140 to be in a stopped state. Therefore, the position fixing pin 125 is no longer rotated even when applying the rotational force to the move spring (180). Furthermore, the elasticity of the move spring 180 absorbs shock and noise at the same time, and reduces friction when rotating along the thread 142.

The noise is also reduced when the move spring 180 abuts against the stopper 170 coupled to the top of the rotor receiver 140 and the stop groove 146 formed at the bottom.

FIG. 6 is a view illustrating a state in which the rotor receiver 140, the move spring 180, and the stopper 170 are separated from each other, and the move spring 180 is disposed between the threads 142 of the rotor receiver 140. This is coupled, the stopper 170 is coupled to the upper end of the rotor receiving unit 140 is a structure. The stopper 170 is inserted between the ends of the rotor receiver 140 and then fixed between the threads 142, and the stopper 170 is pressed into the upper end of the rotor receiver 140 by crimping the ends by caulking. It has a fixed form.

In addition, FIG. 7 is a state in which the rotor receiver 140, the move spring 180, and the stopper are coupled to each other. The move spring 180 is moved up and down between the formed stop groove 146. The move spring 180 is moved up and down by the forward and reverse rotation of the position fixing pin 125 fixed to the through hole 123 of the magnet 121. That is, when the position fixing pin 125 raises the move spring 180 coupled between the outer circumferential threads 142 of the rotor receiver 140, the move spring 180 is raised and the second stop bar 184 is raised. The lift is limited by the stop piece 172 of the stopper 170, on the contrary, when the position fixing pin 125 rotates to lower the move spring 180, the first stop bar 182 of the move spring 180 ) Is lowered by the stop groove 146.

As such, the first stop bar 182 and the second stop bar 184 of the move spring 180 are raised by the stop groove 146 formed in the stop piece 172 and the flange 144 of the stopper 170, respectively. And since the lowering is limited so that the linear motion in which the needle 149 is raised and lowered is constantly determined. Furthermore, when the position fixing pin 125 presses the first stop bar 182 and the second stop bar 184 of the move spring 180 in the raised state and the lowered state, the elastic force of the move spring 180 is increased. Noise is greatly reduced.

While the invention has been shown and described in connection with specific embodiments thereof, it will be appreciated that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

As described above, according to the rotor lift limiting device of the electric expansion valve of the present invention, the stopper is installed by fixing the stopper to the upper end of the rotor receiving portion by caulking, forming a fixing groove in the lower flange of the move spring coupled to the thread This is to reduce the wear and noise caused by friction when the rise and fall.

Furthermore, in the present invention, there is an effect of improving reliability in the use of the electric expansion valve, such as to form a stop groove integrally on the bottom flange of the rotor receiver to facilitate assembly.

Claims (7)

In the electric expansion valve, The threaded portion 142 is formed on the outer circumference, and the rotor receiving part 140 is screwed with the yoke 130 inside; A move spring 180 which is screwed to the screw thread 142 of the rotor receiving part 140 and moves up and down, and has elasticity; And A stopper 170 fixed to the upper end of the rotor receiving part 140 by calking and limiting the rise of the move spring 180; Rotor lift limiting device for an electric expansion valve comprising a. The method of claim 1, The stopper 170 is provided with an insertion hole 174 inserted into the upper end of the rotor receiving portion 140 in a ring shape, and a stop piece 172 protruding downward from the outer circumference of the stopper 170. Rotor lift limiting device for an electric expansion valve characterized in that the. The method of claim 1, Rotor raising and lowering device for an electric expansion valve, characterized in that the stop groove 145 for limiting the lowering of the move spring 180 is formed at the lower end of the screw thread (142) of the rotor receiving portion (140). The method of claim 1, The rotor receiver 140 is processed by plating or coating hard nickel (Ni) or titanium (Ti) to minimize wear due to friction with the move spring 180. Electronic lift limiter. The method of claim 1, The mover spring 180 is a rotor for an electric expansion valve, characterized in that the delta type move spring is provided with a first stop bar 182 and a second stop bar 184 bent at both ends in a circular ring shape is applied. Lift limit device. The method of claim 5, The circular shape of the move spring 180 is wound one or more times in the form of being spaced apart between the first fixing bar 182 and the second fixing bar 184. The method of claim 5, The circular shape of the move spring 180 has a form in which the space between the first fixing bar 182 and the second fixing bar 184 is wound less than one time.

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