KR100944763B1 - Electronical expansion valve making low noise - Google Patents

Abstract

The present invention relates to a low-noise type expansion valve, the can protruding an annular projection on the upper surface to reduce the noise and vibration generated therein; A valve body coupled to the bottom of the can but having an O-ring interposed between an upper body and a lower body coupled to the lower body to seal the valve chamber; A positioner holder coupled to the inside of the valve chamber and having a female thread formed in the middle of the center penetration portion, a positioner coupled to the multi-stage gear and engaged with the female screw so that a rotational movement is changed into a linear movement, and a male screw formed on an outer surface thereof, and a circular shape inside the positioner holder. An inner groove having a space formed therein, and a positioner body having a protrusion formed in a semicircular shape on the lower surface of the positioner; Adjust the flow rate of the high-pressure refrigerant discharged to the discharge pipe by bolted to the lower end of the positioner main body is a linear movement on the same line as the positioner, but the projection groove that is in close contact with the protrusion and the upper surface, and bolted to the lower end of the poppet valve rod A poppet valve having a poppet valve head formed therein; A bellows at which an upper fixing ring is fixed to a stepped surface formed inside the upper lower body, and a lower end of which is joined during an outer circumference of the poppet valve rod; The upper fixing ring is fixed but made of a structure including an O-ring formed at the bottom of the positioner holder to reduce the vibration and noise generated by the vertical movement of the bellows.

As described above, the low noise expansion valve according to the present invention allows the high pressure refrigerant to flow continuously by the inclined surfaces formed in the valve chamber and the poppet valve head when the high pressure refrigerant passes through the inlet pipe, the valve chamber, and the discharge pipe. Noise caused by cavitation caused by rapid fluctuations in the wire can be prevented.

Expansion Valve, Positioner, O-Ring, Bellows, Poppet Valve

Description

Electronic expansion valve making low noise}

The present invention relates to a low-noise expansion valve that can be used in a refrigerator or air conditioner to linearly control the flow rate of the high pressure refrigerant in the valve chamber, and to liquefy and depressurize the high pressure refrigerant to atomize the liquid refrigerant to spray gas. will be.

In general, an electronic expansion valve is used for a high efficiency heat pump, an air conditioner and an air conditioner, and drives a step motor to control a flow rate of refrigerant flowing into the valve chamber.

1 is a view for explaining a conventional "electric valve" registered in the Republic of Korea Patent Publication No. 10-2006-0050858, the electric valve 100 is a valve chamber 140 and the valve seat 120 The valve body 200 having the valve body 200, the valve body 500 mounted in the valve body 200, the valve rod 600 for operating the valve body 500, and the screw rod 800 for converting the rotational motion into linear motion. ), And an electric valve (100) having an electric motor and a gear reduction device that decelerates the output of the electric motor and transmits it to the screw rod (800), wherein the metallic cylindrical can containing the electric motor and the gear reduction device is formed. 300 and a sealing member 900 for sealing an opening of the can 300, and a convex rib 320 extending radially from the center to the disk-shaped upper surface 310 of the can 300 is provided. It is made of a provided structure.

As described above, when the high-pressure refrigerant flows in and out of the valve chamber rapidly, the conventional expansion valve is partially cavitation in a rectangular space where the poppet valve head and the poppet valve rod are connected, and the flow rate of the high pressure refrigerant changes. There is a problem that discontinuous noise occurs.

In addition, there is a problem that a resonance phenomenon occurs due to the natural vibration of the step motor and the multi-stage gear and the refrigerant flow noise.

In the present invention, the upper surface of the can is processed with various types of irregularities to reduce vibration of the step motor and the multi-stage gear, and the high-pressure refrigerant flowing into the inlet pipe is flexibly formed by forming an inclined surface on the inner part of the valve chamber and the poppet valve head. It is an object of the present invention to provide a low noise expansion valve that is moved.

In addition, it is an object of the present invention to provide a low-noise expansion valve in which the lateral vibration is reduced by processing the poppet valve head groove at the bottom of the poppet valve head having a strong tendency to vibrate in the circumferential direction.

The present invention can and the annular protrusion projecting on the upper surface to reduce the noise and vibration generated inside;

A valve body coupled to the bottom of the can but having an O-ring interposed between an upper body and a lower body coupled to the lower body to seal the valve chamber;

A positioner holder coupled to the inside of the valve chamber and having a female thread formed in the middle of the center penetration portion, a positioner coupled to the multi-stage gear and engaged with the female screw so that a rotational movement is converted into a linear movement, and a male screw formed on an outer surface thereof, and a circular shape inside the positioner holder. An inner groove having a space formed therein, and a positioner body having a protrusion formed in a semicircular shape on the lower surface of the positioner;

Adjust the flow rate of the high-pressure refrigerant discharged to the discharge pipe by bolted to the lower end of the positioner main body is a linear movement on the same line as the positioner, but the projection groove that is in close contact with the protrusion and the upper surface, and bolted to the lower end of the poppet valve rod A poppet valve having a poppet valve head formed therein;

A bellows at which an upper fixing ring is fixed to a stepped surface formed inside the upper lower body, and a lower end of which is joined during an outer circumference of the poppet valve rod;

The upper fixing ring is fixed but made of a structure including an O-ring formed at the bottom of the positioner holder to reduce the vibration and noise generated by the vertical movement of the bellows.

In addition, the lower body is formed with an inclined surface inclined from the inner side to the outer side in the inlet pipe is bent to the upper valve chamber.

In addition, the poppet valve head has a poppet valve head groove is formed to reduce the vibration generated in the poppet valve rod when the discharge pipe is opened in the lower center, the inclined surface is formed on the top / bottom to form a smooth streamline of the high-pressure refrigerant.

In addition, the can is formed with a spiral protrusion on the upper surface to reduce the noise and vibration generated inside.

In addition, the can is formed with a cross-shaped protrusion on the upper surface to reduce the noise and vibration generated inside.

In addition, the poppet valve is a linear movement on the same line as the positioner, but the poppet valve body formed on the upper surface of the projection groove is in close contact with the protrusion and the separation, formed on the lower end of the poppet valve body to discharge the high-pressure refrigerant discharged to the discharge pipe The poppet valve head to be adjusted, and a spring is fixed to the protruding surface formed on the bottom of the lower body so that the poppet valve head is returned after compression.

In addition, the bellows is connected to the upper end of the poppet valve body, the upper end of the bellows is formed by pressing the inner groove formed in the positioner main body is fixed.

In addition, the poppet valve head is formed with a stepped surface having an outer diameter equal to the inner diameter of the discharge pipe so that a portion thereof is inserted into the discharge pipe.

As described above, the low noise expansion valve according to the present invention allows the high pressure refrigerant to flow continuously by the inclined surfaces formed in the valve chamber and the poppet valve head when the high pressure refrigerant passes through the inlet pipe, the valve chamber, and the discharge pipe. Noise due to cavitation caused by rapid fluctuations in the wire can be prevented.

In addition, the upper surface of the can is processed into an uneven shape to reduce vibration caused by the stepper motor and the multi-stage gear, and the poppet valve head groove is formed at the bottom of the poppet valve head to reduce the vibration generated in the poppet valve when the discharge pipe is opened. have.

Hereinafter, a preferred embodiment according to the configuration and operation of the low noise expansion valve according to the present invention will be described in detail with the accompanying drawings.

Figure 2 is a cross-sectional view of the low noise expansion valve according to the present invention, Figure 3 is a cross-sectional view of the use state of the low noise expansion valve according to the present invention, Figure 4 (a) and (b) is a low noise expansion valve according to the present invention 5A and 5B are plan and cross-sectional views of a can according to another embodiment of the present invention, and FIGS. 6A and 6B are still another embodiment of the present invention. Is a plan view and a cross-sectional view of a can according to FIG. 7 is a cross-sectional view of a low noise expansion valve according to another embodiment of the present invention, and FIG. 8 is an enlarged view of a portion A of FIG. It indicates an expansion valve formed by the invention.

The low-noise type expansion valve of the present invention, the can 10 and the upper body 21 is coupled to the bottom of the can 10 protrudes the annular projection 13 on the upper surface to reduce the noise and vibration generated inside. ) And a valve body 20 having an O-ring 24 formed between the lower body 22 coupled to the lower body 22 to seal the valve chamber 23, and the upper part coupled to the multi-stage gear 12 and rotating. A positioner body 30 having a positioner 32 in which movement is converted into a linear movement, and a bolt 422 are fastened to a lower end of the poppet valve rod 41 linearly moving in the same line as the positioner 32, and the discharge pipe 222 Poppet valve 40 is formed with a poppet valve head 42 for adjusting the flow rate of the high-pressure refrigerant (not shown) discharged to the upper, and the upper fixing ring on the step surface 25 formed on the inner side of the lower body 22 (51) is fixed and the bellows (50) that the lower end is joined during the outer periphery of the poppet valve rod (41), and So that the top retaining ring 51 is equal to the vibration and noise generated by the vertical movement of the fixed reduction doedoe bellows 50 is made of a structure comprising the O-ring 60 formed at the bottom of the positioner holder 31.

In particular, the inclined surface 423 is formed so that the streamline of the high-pressure refrigerant is gently formed on the upper and lower end of the poppet valve head (42).

As shown in FIG. 2, the can 10 includes a step motor 11 for converting electrical energy into kinetic energy, a multi-stage gear 12 that is coupled to the step motor 11 to rotate, and the step motor ( 11) and the annular projection 13 is formed on the upper surface of the can 10 to reduce the noise and vibration generated by the multi-stage gear 12.

The can 10 includes a first gear 121, a second gear 122, a third gear 123, a fourth gear 124, and a fifth gear 125 to a step motor 11 that provides power therein. ), The sixth gear 126 is sequentially connected and rotated, the sixth gear 126 is coupled to its center is formed with a positioner 32 to rotate together.

The positioner main body 30 is coupled to the upper body 21 and is coupled to the positioner holder 31 having the female thread 311 formed in the middle of the central through portion, and the multi-stage gear 12, and engaged with the female screw 311 for rotational movement. Semi-circular to the positioner 32 formed on the outer surface of the external thread 321 to be changed in a linear motion, the inner groove 33 is formed in a space formed inside the positioner holder 31 and the space, and the lower surface of the positioner 32 The protrusion 34 formed as is formed.

The positioner 32 is formed through the center of the positioner holder 31. The male screw 321 formed outside the positioner 32 is coupled to the female screw 311 formed inside the positioner holder 31 to move the sixth gear ( Rotational motion by 126) is converted to linear motion.

In particular, the semi-circular projection 34 protruding at the end of the positioner 32 is pressed by the projection groove 411 formed on the upper surface of the poppet valve rod 41 when the positioner 32 is lowered by the linear motion. The poppet valve head 42 coupled to the bottom of the poppet valve rod 41 is lowered downward.

Due to the poppet valve head 42 descended as described above, the interval with the valve seat 26 formed in the valve chamber 23 is adjusted, and the flow rate of the high pressure refrigerant discharged through the discharge pipe 222 is adjusted.

On the other hand, the bellows 50 for maintaining the airtight inside the can 10 has an upper fixing ring 51 fixed to the step surface 25 formed inside the upper part of the lower body 22, and the sealing / absorption at the upper part thereof. The fixed O-ring 60 is formed, and the upper fixing ring 51 is fixed without a separate fixture due to the positioner holder 31 squeezed to the O-ring 60.

In addition, the bellows 50 is joined to the outer periphery of the positioner 32 by soldering so that the airtight inside the can 10 is maintained. The bellows 50 is formed of an elastic body having a restoring force so that the positioner 32 is upward as shown in FIG. 3. Poppet valve 40 is also to be moved to the top when moving.

In particular, the O-ring 60 reduces vibration generated when the positioner 32 is operated due to its own elastic force in addition to the sealing of the valve chamber 23.

Valve body 20 is the coupling portion of the upper body 21 and the lower body 22 is sealed using the O-ring 24, it is formed inside by the combination of the upper body 21 and the lower body 22 And a step surface 25 in which the valve chamber 23, which is a space in which the refrigerant flows, is further protruded inward to the upper portion of the lower body 22, and the upper fixing ring 51 of the bellows 50 is in close contact with the lower portion 22. A valve seat 26 is formed on the body 22 to be in close contact with the poppet valve head 42 and to be detached from the poppet valve head 42 to adjust the refrigerant flow area.

The lower body 22 is formed with an inclined surface 223 in order to reduce the cavitation (Cavitation) by the high-pressure refrigerant inside the portion where the inlet pipe 221 is bent to the upper portion of the valve chamber (23).

2 and 3, the poppet valve head 42 moves up and down in the valve seat 26 formed on the lower body 22, and the flow path cross-sectional area is widened or narrowed to discharge through the discharge pipe 222. The flow rate of the high pressure refrigerant is controlled.

Poppet valve 40 is a linear motion on the same line as the positioner 32, but a poppet valve rod 41 formed on the upper surface of the projection groove 411 is in close contact with the protrusion 34 and the poppet valve rod ( 41 is a poppet valve head 42 is fastened to the lower end of the bolt 422 to control the flow rate of the high-pressure refrigerant discharged to the discharge pipe 222.

As shown in the flow of the high-pressure refrigerant shown by the arrow in Figures 2 and 3, the poppet valve 40 is formed on the top / top of the poppet valve head 42 so that the streamline of the high-pressure refrigerant flowing into the inlet pipe 221 is formed to reduce the noise. The inclined surface 423 is formed at the bottom.

In addition, the portion of the poppet valve head groove 421 mitigates the resonance generated when the expansion valve 1 is operated by converting the longitudinal vibration generated from the discharge pipe 222 to the horizontal vibration when the expansion valve 1 flows open. Let's do it.

As shown in Figure 4 (a), (b), the can 10 is formed by forming a ring-shaped projection 13 protruding in a circular shape on the upper surface in the process of pressing the can 10, the ring Increasing the number of the projections 13 results in an increase in the convex area, thereby improving the rigidity of the upper surface of the can 10 so as to reduce noise and vibration due to the operation of the step motor 11 and the multi-stage gear 12.

Figure 5 (a), (b) is a can 10 of the low noise expansion valve according to another embodiment of the present invention, unlike Figure 4, unlike the helical protrusion on the upper surface to reduce the noise and vibration generated inside (13a) is formed.

Figure 6 (a), (b) is a can 10 of the low noise expansion valve according to another embodiment of the present invention, unlike Figure 4, the cross-shaped projection on the upper surface to reduce the noise and vibration generated inside (13b) is formed.

7 is a low-noise expansion valve according to another embodiment of the present invention, the poppet valve 40 is a linear groove on the same line as the positioner 32, but the protrusion groove 431 is in close contact with / detached with the projection 34 A poppet valve body 43 formed on the upper surface, a poppet valve head 42a which is separately formed at a lower end of the poppet valve body 43 and controls a flow rate of the high pressure refrigerant discharged to the discharge pipe 222, and the poppet A spring 44 fixed to the protruding surface 441 formed at the lower end of the lower body 22 is formed to return the valve head 42a after compression.

The poppet valve head 42a and the poppet valve body 43 are also returned after being compressed by the bellows 50a, but springs fixed to the protruding surface 441 formed at the inner lower end of the lower body 22 so as to shorten the return time. 40) to return faster.

Meanwhile, as shown in FIG. 8, a portion of the lower end of the poppet valve body 43 is formed with an inclined surface 432 so that a streamline of the high pressure refrigerant is smoothly formed, and the poppet valve head 42a has a lower end to maintain the airtightness of the high pressure refrigerant. A portion of the stepped surface 424 is inserted into the discharge pipe 222 and has an outer diameter equal to the inner diameter of the discharge pipe 22.

In addition, the bellows 50a is joined to the upper end of the poppet valve body 43 by soldering, and an upper end fixing ring 51a is press-fitted into the inner groove 33 formed in the positioner body 30.

As described above, in the present invention, while the upper fixing ring 51 is fixed by using the O-ring 60, the flow noise of the high-pressure refrigerant generated from the expansion valve 1 is a natural frequency of the step motor 11 and the multi-stage gear 12. It is not combined with, and the bellows 50 is fixed by the positioner holder 31 and the O-ring 60 has the effect of reducing the labor maneuver to improve the production efficiency.

In addition, the inclined surfaces 423 and 423a formed on the inclined surface 223 of the valve chamber 23 and the poppet valve heads 42 and 42a when the high pressure refrigerant passes through the inlet pipe 221, the valve chamber 23, and the discharge pipe 222. By the continuous high-pressure refrigerant flow by the) has the effect of preventing noise due to cavitation (Cavitation) caused by the rapid fluctuation of the wire.

In addition, the upper surface of the can 10 is processed into an uneven shape such as the annular protrusion 13, the spiral protrusion 13a, and the cross protrusion 13b to reduce the vibration of the step motor 11 and the multi-stage gear 12. By forming a poppet valve head groove 421 at the bottom of the poppet valve heads 42 and 42a, vibration generated in the poppet valve 40 when the discharge pipe 222 is opened is reduced.

The present invention is not limited to the preferred embodiments of the above features, and various modifications can be made by those skilled in the art without departing from the gist of the invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

1 is an explanatory view of an electric valve according to the prior art

Figure 2 is a cross-sectional view of a low noise expansion valve according to the present invention

Figure 3 is a cross-sectional view of the use state of the low noise expansion valve according to the present invention

4 (a) and (b) are a plan view and a cross-sectional view of a can of the low noise expansion valve according to the present invention.

5 (a) and (b) are a plan view and a cross-sectional view of a can according to another embodiment of the present invention

6A and 6B are a plan view and a cross-sectional view of a can according to another embodiment of the present invention.

7 is a cross-sectional view of a low noise expansion valve according to another embodiment of the present invention.

FIG. 8 is an enlarged view of a portion A of FIG. 7;

<Description of the symbols for the main parts of the drawings>

1: expansion valve 10: can

11: step motor 12: multi-stage gear

121: first gear 122: second gear

123: third gear 124: fourth gear

125: fifth gear 126: sixth gear

13: annular projection 13a: spiral projection

13b: cross protrusion 20: valve body

21: upper body 22: lower body

221: inlet pipe 222: discharge pipe

223: slope 23: valve chamber

24: O-ring 25: step surface

26: valve seat 30: positioner body

31: Positioner holder 311: Female thread

32: positioner 321: male thread

33: inner groove 34: projection

40: poppet valve 41: poppet valve rod

411: projection groove 42,42a: poppet valve head

421: poppet valve head groove 422: bolt

423,423a: slope 424: step surface

43: poppet valve body 431: protrusion groove

432: slope 44: spring

441: protrusion 50, 50a: bellows

51, 51a: upper fixing ring 60: O-ring

Claims (8)

The multi-stage gear 12 driven by the step motor 11 is formed therein and is sealed to the can 10 and the can 10, and the inlet pipe 221 and the discharge pipe 222 are disposed at the bottom thereof. A valve body 20 having a vertically formed valve body 23 having a high pressure refrigerant therein, and a positioner 32 having a positioner 32 vertically moved by the multi-stage gear 12 in the valve chamber 23. The poppet valve 40 vertically moves by the main body 30 and the force of the positioner 32, but adjusts an interval with the valve seat 26 and adjusts the amount of refrigerant discharged to the discharge pipe 222. In the valve, The can 10 has an annular protrusion 13 formed on an upper surface thereof to reduce noise and vibration generated therein, and an upper body 21 and a lower body coupled to the lower part of the can 10. The valve body 20 having the O-ring 24 formed therebetween to be sealed between the valve chambers 23 is coupled to each other, and the female thread 311 is formed in the middle of the central through part. A positioner 32 coupled to the positioner holder 31 and the multi-gear gear 12, and having a male screw 321 formed on an outer surface thereof so as to be engaged with the female screw 311 so that the rotational movement is converted into a linear movement, and the positioner holder 31. A positioner body (30) protruded into an inner groove (33) having a space formed therein, and a protrusion (34) formed in a semicircular shape on a lower surface of the positioner (32); The poppet valve rod 41 and the poppet valve rod formed on the upper surface of the positioner main body 30 with a projection groove 411 which is linearly moved in the same line as the positioner 31 but is in close contact with the protrusion 34. (41) a poppet valve (40) having a poppet valve head (42) formed at a lower end thereof to adjust a flow rate of the high pressure refrigerant discharged to the discharge pipe (222) by fastening the bolt (422), and the upper body (22) The upper fixing ring 51 is fixed to the stepped surface 25 formed on the inner side, and a bellows 50 is formed to which the lower end is joined during the outer periphery of the poppet valve rod 41, and the upper fixing ring 51 is fixed to the bellows. Low noise expansion valve, characterized in that it comprises an O-ring (60) formed at the bottom of the positioner holder (31) to reduce the vibration and noise generated by the vertical movement of the (50). The method of claim 1, The lower body 22 is a low-noise expansion valve, characterized in that the inlet pipe 211 is formed in the inclined surface 223 inclined from the inner side to the outer portion in the upper portion of the valve chamber 23. The method of claim 1, The poppet valve head 42 has a poppet valve head groove 421 is formed to reduce the vibration generated in the poppet valve rod 41 when opening the discharge pipe 222 at the bottom center, the streamline of the high-pressure refrigerant is formed smoothly Low noise expansion valve, characterized in that the inclined surface 423 is formed on the top / bottom. The method of claim 1, The can 10 is a low noise expansion valve, characterized in that the spiral projection (13a) is formed on the upper surface to reduce the noise and vibration generated inside. The method of claim 1, The can 10 is a low noise expansion valve, characterized in that the cross-shaped projection (13b) is formed on the upper surface to reduce the noise and vibration generated inside. The method of claim 1, The poppet valve 40 linearly moves in the same line as the positioner 32, but has a poppet valve body 43 formed on the upper surface thereof with a protrusion groove 431 in close contact with the protrusion 34, and the poppet valve body ( 43) a poppet valve head 42a which is formed at a lower end to adjust the flow rate of the high pressure refrigerant discharged to the discharge pipe 222, and is formed at the bottom of the lower body 22 so that the poppet valve head 42a is returned after compression; Low noise expansion valve, characterized in that the spring 44 is fixed to the protruding surface 441 is formed. The method according to claim 1 or 6, The bellows 50 is a lower noise is characterized in that the lower end is joined to the upper end of the poppet valve body 43, the upper fixing ring 51a is pressed in and fixed to the inner groove 33 formed in the positioner body 30 Expansion valve. The method according to claim 1 or 6, The poppet valve head (42,42a) is a low noise expansion valve, characterized in that the stepped surface 424 having an outer diameter equal to the inner diameter of the discharge pipe 222 so that a portion is inserted into the discharge pipe (222).

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