KR100946722B1 - Disk bellows type electronic expansion valve - Google Patents

Abstract

The present invention relates to an electronic expansion valve using a disk bellows, comprising: a can (13), a case body (11), and a multi-stage gear part (20) driven by a step motor (17) formed therein and sealed. The inlet pipe 81 and the outlet pipe 82 coupled to the lower case body 11 to move the refrigerant are formed in the valve chamber 53 and the valve body 53. The positioner main body 30 having the positioner 33 vertically moved by the short-term fisherman 20 and the positioner 33 move by the pressing force to adjust the flow rate of the refrigerant discharged to the outlet pipe 82. In the expansion valve consisting of a poppet valve (61), a case body outer periphery projection (12) formed of an outer circumferential surface formed with an opening on the case body (11), and a square formed under the projection (12) toward the inner diameter side Protruding groove 15 and the circular inserted into the square projection groove (15) The case body 11, the can 13, and the case body 11, each of which includes a sealing 14, a can 13 having a bent portion in which a lower end of the can 13 is bent inward while surrounding the circular sealing. The disk bellows 123 is provided to be in close contact with the outer peripheral end formed horizontally to the guide surface 71 formed on the inner diameter side of the valve body 52 so as to seal the inside, and is coupled to the case body 11, the positioner 33 It is composed of a positioner body portion 30 composed of a positioner holder 32 penetrated by). Therefore, the present invention is bent in the form of the bent portion is fixed to the outer periphery of the case body surrounding the projection groove inserted into the circular seal on the outer periphery of the case body, the can and the case body is not fixed using a separate jig The disc bellows in the inner groove of the positioner holder can be designed to be simpler than the conventional bellows expansion valve to reduce the cost and time required for processing and assembly, and the disc provided in the inner groove of the positioner holder. Due to the bellows, the refrigerant in the valve chamber is blocked from flowing into the can.

Disc Bellows, Electronic Expansion Valve, Expansion Valve

Description

Disk bellows type electronic expansion valve

The present invention relates to an electronic expansion valve using a disk bellows, and more particularly, it is used in a refrigerator or an air conditioner to linearly control the flow rate of the flow refrigerant in the valve chamber, and to throttle the high pressure refrigerant to facilitate evaporation. The present invention relates to an electronic expansion valve using a disk bellows capable of reducing gas pressure to spray gaseous liquid refrigerant.

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

1 is a view for explaining a conventional "electric valve" registered in the Republic of Korea Patent Publication No. 10-2006-0073427, the electric valve is a valve body having a valve chamber 200A and valve seat 200B The valve part 200 which consists of 200C, the valve body 200D equipped in the valve body 200C, the valve rod 200E which operates the valve body 200D, the valve chamber 200A, and a valve | bulb A bellows 300 for sealing between the inside of the rod 200E; The can 100A of metal containing the screw rod 400 for converting the rotational motion to the linear motion, the electric motor, the gear reduction device for slowing the output of the electric motor and transmitting it to the screw rod 400, and the can ( 100 A of openings 100B of 100 A, the seal structure member 100C which seals the opening 100B of the can, and a part of 100 A of seal structure members 100C which seal the opening 100B of the can 100A can 100A. It is characterized by consisting of the can portion 100 consisting of a high pressure opening (100D) for opening the high pressure inside.

However, as described above, the conventional expansion valve has a form in which the bellows 300 is integrally fixed to the valve rod 200E by welding, and the bottom of the valve rod 200E and the bellows ( 300) Since the joining beads must be welded tightly along the outer periphery of the lower end, the labor cost increases and the manufacturing cost increases, and the opening 100B of the can 100A is caulked using the seal structure member 100C. There is a problem that must be used separately jig for assembling in order to fix the position of the seal structure member (100C).

In order to solve the above problems, in the present invention, in the method of fixing the can to the case body, a projection groove is installed on the outer periphery of the upper case of the case body to avoid the use of a separate jig for holding the circular sealing position. Provides an electronic expansion valve using a disk bellows to seal the can body and the can integrally with a simple bending process and to prevent the refrigerant in the valve chamber from entering the can due to the disk bellows provided in the inner groove of the positioner holder. Its purpose is to.

In order to achieve the object, a multi-stage gear unit driven by a step motor is formed inside and sealed, a case body, an inlet pipe and an outlet pipe coupled to a lower part of the case body to move the refrigerant to the valve chamber. A positioner body portion having a valve body portion formed therein, a positioner body portion having a positioner vertically moved by the multi-stage gear portion in the valve chamber, and a poppet valve for controlling the flow rate of the refrigerant discharged to the outlet pipe by moving by the force of the positioner; In the expansion valve consisting of,

A case body outer periphery protrusion formed by an outer circumferential surface having an opening formed in the upper portion of the case body, a square protrusion groove formed toward the inner diameter side at the lower side of the protrusion, a circular sealing inserted into the square protrusion groove, and a can while wrapping the circular sealing. A disc bellows provided with a case main body consisting of a can formed with a bent portion having a lower end bent inward, and an outer peripheral end formed horizontally in close contact with a guide surface formed at an inner diameter side of the valve main body to seal the can and the case body inside; Coupled to the case body, the positioner is composed of a positioner body portion consisting of a positioner holder penetrates.

In particular, the disk bellows is a plurality of semicircular projection grooves having elasticity in concentric shape so that the poppet valve head is detachable to the valve seat through the poppet valve rod by the movement of the positioner and the protrusion formed on the lower position of the positioner. It consists of In addition, the disk bellows is formed of a phosphor bronze metal sheet material having a soft elastic properties to move in conjunction with the positioner.

In addition, the poppet valve has a poppet valve head through groove formed at the outer circumference of the poppet valve head for smooth flow of residual refrigerant around the poppet valve rod when the valve flow path is opened, and is generated based on the outlet pipe when the flow path of the expansion valve is opened. It is composed of a poppet valve head groove for mitigating the resonance generated during operation of the expansion valve by converting the longitudinal vibration into a lateral vibration.

As a feature of the present invention, the valve body is coupled to the positioner holder inner groove portion, there is formed a rectangular sealing between the two to prevent foreign matter from entering the valve, the valve body is formed at a right angle at the bottom to the valve chamber Inlet and outlet pipes are formed. In particular, the poppet valve head moves upward and downward in the valve seat formed at the bottom of the valve body to form a wider or narrower distance, thereby controlling the flow rate of refrigerant passing through the valve chamber.

In addition, the disc bellows return the closed poppet valve as shown in FIG. 3 to the open state as shown in FIG. 2, and the center bottom surface of the disc bellows is welded to the upper surface of the poppet valve rod to the positioner when the positioner is decompressed. The poppet valve head is pushed back by the elastic restoring force of the disk bellows compressed by the disk bellows.

In particular, the poppet valve head groove portion mitigates the resonance generated during operation of the expansion valve by converting the longitudinal vibration generated on the discharge pipe when the expansion valve flow path is opened into the lateral vibration. In addition, the poppet valve head is formed with a plurality of through grooves for smoothly entering and exiting the refrigerant into the valve chamber, and the poppet valve head remains around the poppet valve rod in the process of changing the poppet valve head from the bottom to the top by the disk bellows. The refrigerant is moved so that the poppet valve head is smoothly returned to the upper portion.

The present invention not only enhances the sealing effect in a simpler form than the conventional bellows refrigerant seal structure by providing a disc bellows in the inner groove of the positioner holder, but also reduces the work area by reducing the bead fusion area than the conventional bellows. This reduces the production efficiency.

In addition, the lower end portion of the can is fixed in a bent form with a circular sealing in the protrusion groove formed on the outer periphery of the upper case of the main body body can also reduce the number of assembly jig.

As described above, in the present invention, the bent portion is bent in the form of being fixed to the outer periphery of the case body and surrounding the protrusion groove in which the circular sealing is inserted into the outer periphery of the case body, so that the can is not fixed by using a separate jig. The case body can be sealed, and the disc bellows are provided in the inner groove of the positioner holder, which is designed to be simpler than the conventional bellows expansion valve, reducing the cost and time required for processing and assembly, and the inner groove of the positioner holder. Due to the disk bellows provided in the there is an effect of blocking the refrigerant in the valve chamber flows into the can.

2 is a cross-sectional view of an electronic expansion valve using a disk bellows according to the present invention, Figure 3 is a cross-sectional view of the electronic expansion valve using a disk bellows according to the present invention, Figure 4 is an electronic using a disk bellows according to the present invention A cross section of another embodiment of an expansion valve. Figure 5 is an enlarged cross-sectional view of the disk bellows according to the present invention, Figure 6 is a cross-sectional view of the poppet valve through groove shape of the electronic expansion valve using the disk bellows according to the present invention.

Hereinafter, the components of the present invention and its operation will be described with reference to the drawings.

The electronic expansion valve using the disc bellows 41 of the present invention is a metal can 13 coupled to a multi-stage gear part 20 that is connected to a step motor 17 that generates power by electric energy and rotates. Is coupled to the lower end so that the inside of the can 13 is sealed, and penetrates the lower opening portion 16 for receiving the positioner body portion 30 and the positioner holder 32 in close contact with the lower opening portion 16. Positioner 33 is coupled to the multi-stage gear portion 20, the case body portion 11 composed of a positioner body portion 30 to change the rotational movement to a linear motion, and the position of the positioner body portion 30 in the pressing action It consists of a combination of the poppet valve 61 for controlling the flow of the refrigerant by linear movement vertically.

In particular, the disk bellows 41 is formed at the lower end of the positioner holder 32 to prevent the refrigerant flowing into the valve body 50 from flowing into the can 13.

As shown in FIG. 2, the can 13 and the case body 11 are driven by the multi-stage gear part 20 and the step motor 17, and the lower end of the can 13 is the upper part of the case body 11. The outer circumferential protrusion 12 is bent to the outside and then bent in a shape to surround the case body 11 outer circumferential square protrusion groove 15 inserted into the circular sealing 14 is inserted. Therefore, the circular sealing 14 is inserted into the outer circumferential square protrusion groove 15 in which the rectangular space of the case body 11 is formed, thereby effectively sealing the intrusion of foreign matter into the can 13 and the case body 11. .

In addition, the can 13 and the case body 11 may include a first gear 21, a second gear 22, a third gear 23, and a fourth gear 24 to a step motor 17 that provides power therein. ), The fifth gear 25, the sixth gear 26 consisting of the sixth gear 26 is connected in order to rotate, the sixth gear 26 is the positioner 33 is coupled to the center thereof together Rotate

Positioner body portion 30 is coupled to the multi-stage gear portion 20, the positioner 33 is formed with a male screw 342 on the outer periphery, and coupled to the inner side of the lower opening 16 of the case body 11, the central through portion A positioner holder 32 having a female screw 341 formed therein, and a protrusion 35 projecting in a semicircular shape on the lower surface of the positioner 33.

The positioner 33 is formed through the center of the positioner holder 32. The male screw 342 formed outside the positioner 33 is coupled to the female screw 341 formed inside the positioner holder 32 so that the sixth gear 26 is formed. Rotational motion is converted into linear motion.

 In particular, a positioning E-ring (not shown) is attached to the upper end and the lower end of the positioner 33 to prevent the position of the assembly of the sixth gear 26 from the positioner 33, and the positioner 33 is Even if the lift peak is exceeded, departure from the position assembled with the positioner holder 32 is prevented.

In addition, the positioner body portion 30 is coupled to the case body 11, the lower position of the positioner holder 32 with the positioner holder inner groove 321 is formed at the lower end of the outer periphery of the square projection 322 to install a metal ring The square projection 322 is provided with a metal support ring 37 for supporting the position of the hexagon nut 36. The metal support ring 37 is supported on the inner diameter side step portion 361 of the hexagon nut 36, the hexagon nut 36 is free to perturb in the circumferential direction and the case body 11 direction, the valve body ( 32) It is fastened with the male thread processed on the upper part. The hexagon nut 36 includes a case body 11 accommodating the multi-stage gear part 20 and the positioner body part 30, and a valve body part 50 accommodating the disc bellows 41 and the poppet valve 61. Combine into a single piece.

The disc bellows 41 has a support surface 44 on which the protrusions 35 formed at the bottom of the positioner 33 are detached, and a center bottom thereof is integrated with the poppet valve 61 by the movement of the positioner 33. The head 63 is composed of a plurality of concentric ductile grooves 43 so as to be detachable from the valve seat 51. The disk bellows 41 is in close contact with the guide surface 71 formed in the upper portion of the valve chamber 53, so that the fluid refrigerant in the valve chamber 53 does not enter the step motor 17, the edge of the disk bellows 41 Is welded to the inner diameter side guide surface 72 perpendicular to the guide surface 71 of the valve chamber 53, and the edge portion in contact with the guide surface 71 of the valve chamber 53 is hermetically sealed. In addition, the overall material is formed of a phosphor bronze metal sheet having a soft elastic properties so that the concentric grooves 43 move in conjunction with the positioner 33.

On the other hand, the semi-circular protrusion 35 protruding at the end of the positioner 33 is pressed by the flat protrusion supporting surface 44 formed at the center of the upper surface of the disc bellows 41 when the positioner 33 is lowered by the linear movement. , The semi-circular projection groove 43 is extended to about a few hundred micrometers while the center of the disc bellows 41 is lowered to the bottom. Then, the poppet valve rod 64 in close contact with the bottom of the disk bellows 41 moves downward, and the gap between the poppet valve head 63 and the valve seat 51 formed integrally with the poppet valve rod 64 is adjusted, and the valve is adjusted. The flow rate of the refrigerant through the chamber 53 is adjusted.

Hereinafter, a description will be given of a method of operation based on the configuration of the electronic expansion valve using the disk bellows.

 The valve body 52 is coupled to the positioner holder inner groove 321 portion between the two is formed with a rectangular sealing 38 to prevent foreign matter from entering the outside of the valve body, the valve body 52 is perpendicular to the lower portion The inlet pipe 81 and the outlet pipe 82 which are formed and communicate with the valve chamber 53 are formed. In particular, the poppet valve head 63 moves up and down in the valve seat 51 formed at the bottom of the valve body 52 to form a wider or narrower distance, thereby controlling the flow rate of the refrigerant passing through the valve chamber 53.

In addition, when the disc bellows 41 returns the closed poppet valve 61 to the open state as shown in FIG. 2 as shown in FIG. 3, the center bottom surface of the disc bellows 41 is the poppet valve rod upper flat part 62. And the poppet valve head 63 are opened by pushing the poppet valve head 63 by the elastic restoring force of the disk bellows 41 compressed by the positioner 33 when the positioner 33 is decompressed. Return to.

As shown in FIG. 4, the electronic expansion valve using the disc bellows 42 may be configured as another embodiment. 5 is an enlarged cross-sectional view of the disk bellows 42 according to another embodiment of FIG.

In particular, the portion of the poppet valve head groove 632 mitigates the resonance generated during operation of the expansion valve by converting the longitudinal vibration generated based on the outflow pipe 82 when the expansion valve flow path is opened to the horizontal vibration.

As shown in FIG. 6, the poppet valve head 63 is provided with a plurality of through holes 631 for smoothly entering and exiting the refrigerant into the valve chamber 53. The through groove 631 is such that the refrigerant remaining around the poppet valve rod 64 is moved through the through groove 631 while the poppet valve head 63 is switched from the bottom to the top by the disc bellows 41. The poppet valve head 63 is to be smoothly returned to the top.

As described above, the present invention includes a disc bellows 41 in the positioner holder inner groove 321 to increase the sealing effect in a simpler form than the conventional bellows-type refrigerant sealing structure, and to increase the bead fusion area than the conventional bellows. By reducing the disk bellows (41) by reducing the number of work has the effect of improving the production efficiency.

In addition, the lower end of the can 13 is fixed in a bent form with the circular sealing 14 in the projection groove 15 formed on the outer periphery of the upper opening of the case body 11, thereby reducing the number of assembly jigs.

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

1 is a cross-sectional view showing an electric valve according to the prior art.

Figure 2 is a cross-sectional view of the electronic expansion valve using a disk bellows in accordance with the present invention.

Figure 3 is a cross-sectional view of the use state of the electronic expansion valve using a disk bellows in accordance with the present invention.

4 is a cross-sectional view of another embodiment of the electronic expansion valve using a disk bellows according to the present invention.

5 is an enlarged cross-sectional view of a disk bellows in accordance with the present invention.

Figure 6 is a cross-sectional view of the poppet valve through groove shape of the electronic expansion valve using a disk bellows in accordance with the present invention.

Figure 7 is an enlarged cross-sectional view according to another embodiment of the disc bellows according to the present invention.

8 is an enlarged cross-sectional view of the disk bellows according to the embodiment of FIG. 4 in accordance with the present invention.

<Explanation of Signs of Major Parts of Drawings>

10: case part 11: case body

12: case body outer peripheral projections 13: can

14: circular sealing 15: square projection groove

16: case body lower opening 17: step motor

20: multi-stage gear part 21: first gear

22: second gear 23: third gear

24: fourth gear 25: fifth gear

26: sixth gear 30: positioner main body

32: positioner holder 321: positioner holder inner groove

322: positioner holder square projection 33: positioner

34: thread 341: positioner female thread

342: positioner male thread 35: protrusion

36: Hex Nut 361: Hex Nut Inner Diameter Side Step

37: support ring 38: square sealing

40: disc bellows 41,42: disc bellows

43: projection groove 44: projection support surface

50: valve body 51: valve seat

52: valve body 53: valve chamber

60: poppet valve 61: poppet valve

62: poppet valve upper flat portion 63: poppet valve head

631: poppet valve head through groove 632: poppet valve head groove

64: poppet valve rod 70: guide

71,72 guide surface 80 pipe section

81: inlet piping 82: outlet piping

Claims (6)

delete A multi-stage gear portion 20 driven by the step motor 17 is formed inside the can 13 to be sealed and the case body outer periphery protrusion 12 formed with an outer circumferential surface formed with an opening thereon, and the protrusion 12 Square bottom groove 15 formed in the lower side toward the inner diameter side, the circular sealing 14 inserted into the square projection groove 15, and the bottom end of the can (13) while wrapping the circular sealing 14 inside The case body 11 is composed of a can 13 formed with a bent portion bent to the bent, the inlet pipe 81 and the outlet pipe 82 is coupled to the lower case body 11 and the refrigerant is moved valve chamber 53 The outer periphery end formed horizontally is in close contact with the valve body part 50 formed in the horizontal direction, and the guide surface 71 formed on the inner diameter side of the valve body 52 so that the can 13 and the case body 11 inside are sealed. The disk bellows 41 and the cloth vertically moved by the multi-stage gear part 20 in the valve chamber 53. The cooler discharged to the outlet pipe 82 by movement by the force of the positioner 33, the positioner main body portion 30 having the positioner holder 32 through which the positioner 33 penetrates, and the positioner 33 is pressed. In the expansion valve consisting of a poppet valve 61 for controlling the flow rate of The disc bellows 41 includes a protrusion support surface 44 to which the protrusion 35 formed at the bottom of the positioner 33 is detachable; By the movement of the positioner 33 is composed of a plurality of semi-circular projection groove 43 is elastic in a concentric shape so that the poppet valve head 63 is attached to the valve seat 51 via the poppet valve rod 64. Electronic expansion valve using a disk bellows, characterized in that. delete delete delete 3. The method of claim 2, The poppet valve 61 is a poppet valve head groove 632 for mitigating resonance generated during operation of the expansion valve by converting the longitudinal vibration generated based on the outflow pipe 82 when the flow path of the expansion valve opens to the horizontal vibration. Electronic expansion valve using a disk bellows, characterized in that consisting of.

Images