KR20170053532A - Refigerant valve for refrigerator - Google Patents

Refigerant valve for refrigerator Download PDF

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Publication number
KR20170053532A
KR20170053532A KR1020150156165A KR20150156165A KR20170053532A KR 20170053532 A KR20170053532 A KR 20170053532A KR 1020150156165 A KR1020150156165 A KR 1020150156165A KR 20150156165 A KR20150156165 A KR 20150156165A KR 20170053532 A KR20170053532 A KR 20170053532A
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KR
South Korea
Prior art keywords
gear
boss
fixing member
pad
refrigerant
Prior art date
Application number
KR1020150156165A
Other languages
Korean (ko)
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KR101753487B1 (en
Inventor
박홍석
Original Assignee
엘지전자 주식회사
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Priority to KR1020150156165A priority Critical patent/KR101753487B1/en
Publication of KR20170053532A publication Critical patent/KR20170053532A/en
Application granted granted Critical
Publication of KR101753487B1 publication Critical patent/KR101753487B1/en

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    • F25B41/04—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • Y02B40/30—

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The present invention relates to a refrigerant valve for a refrigerator, which comprises: a case forming an inner space; a base plate blocking the opened lower surface of the case and having an introduction pipe allowing introduction of refrigerant and a pair of discharging pipes allowing refrigerant to be discharged; a motor positioned inside the case; a first gear connected to a motor shaft and rotated inside the case; a second gear gear-engaged with one side of the first gear to be interlinked with the first gear; a pad coupled to the second gear and rotated together with the second gear to selectively open and close the pair of discharging pipes; and a fixed member fixed inside the case, having a plate shape, allowing the second gear to be rotatably mounted thereon, and elastically supporting a center part of the upper end of the second gear at the same time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant valve for a refrigerator,

The present invention relates to a refrigerant valve for a refrigerator.

Generally, a refrigerator is a household appliance that allows low-temperature storage of food in an internal storage space that is shielded by a door. To this end, the refrigerator is configured to cool the inside of the storage space by using cool air generated through heat exchange with the refrigerant circulating in the refrigeration cycle, thereby storing the stored food in an optimum state.

Such a refrigerator allows the temperature inside the refrigerator to be maintained at a predetermined temperature so that the food stored in the refrigerator can always be stored in the best condition. In order to maintain the set temperature, the inside must be sealed, and it is configured to have a structure capable of continuous cooling by supplying cold air using a refrigeration cycle.

Meanwhile, the refrigerator may be divided into a refrigerator compartment and a freezer compartment independently, and an evaporator for supplying cold air to the respective storage compartments may be additionally provided to effectively cool the refrigerating compartment and the freezer compartment to different temperatures, It is possible to selectively supply the refrigerant by the operation of the refrigerant valve, thereby making it possible to drive the cycle.

Korean Patent Registration No. 10-0783211 discloses a scroll fluid machine in which an inlet passage and an outlet passage are formed in which a refrigerant flows into and out of a valve chamber and the opening and closing of a plurality of outlets communicating with the outlet passage are made by rotation of a valve body provided inside the valve chamber Thereby enabling selective supply of the refrigerant. The valve body is supported by an elastic body in the form of a coil spring so as to be brought into close contact with a valve base forming the bottom of the valve chamber.

However, although the valve body has a structure in which the valve body can be vertically adhered to the valve base by an elastic body such as a spring having such a structure, there is a problem that leakage of the refrigerant may occur because there is no structure for restricting the flow in the horizontal direction.

Further, if a further structure is further provided to prevent horizontal flow, there is a problem that the overall structure is complicated and the assemblability and productivity are deteriorated.

It is an object of the present invention to provide a refrigerant valve for a refrigerator that allows a pad for opening and closing a flow path of a refrigerant outlet to maintain a stable fixed state without flowing inside the case.

It is another object of the present invention to provide a refrigerant valve for a refrigerator which can maintain a stable performance by fixing a gear rotated together with a pad for opening and closing a channel of a refrigerant outlet so as not to be inclined at various positions.

According to the embodiment of the present invention, the direction of the force of pressing the gear is centered by the plate-shaped elastic member for fixing the gear rotated together with the pad, and the leakage of cold So that the refrigerant can be prevented from being generated.

A refrigerant valve for a refrigerator according to an embodiment of the present invention includes: a case defining a space therein; A base plate for shielding an opened lower surface of the case and having an inlet pipe through which the refrigerant flows and a pair of outlet pipes through which the refrigerant flows; A motor provided inside the case; A first gear connected to the motor shaft and rotated inside the case; A second gear that is gear-engaged with the first gear and is interlocked with the first gear at a side of the first gear; A pad coupled to the second gear and rotated together with the second gear to selectively open and close the pair of outlet pipes; And a fixing member fixed inside the case and formed in a plate-like shape, the second gear being rotatably mounted, and at the same time, a center portion of the upper end of the second gear being elastically supported.

The fixing member includes an elastic support portion that is cut inward from the outside of the fixing member to have a predetermined elasticity and has an end portion for pressing and supporting the gear boss at the upper end of the second gear.

At least a part of the elastic support portion is formed so as to be inclined toward the gear boss.

A lower surface of the gear pad includes a pad protrusion protruded downward to open and close at least the pair of outlet pipes at the same time; And a space portion spaced apart from the bottom surface of the base plate at an outer side of the pad projection portion.

And an inclined surface formed on the upper surface of the gear boss so as to have a downward inclination toward the space, the inclined surface being spaced apart from an end of the elastic support.

And a leg portion extending downward around the fixing member to support the fixing member on the base plate.

And a plurality of side supporters extending downwardly around the fixing member and being elastically supported on a side surface of the case to prevent the fixing member from flowing.

The base plate is provided with a boss which is in contact with the lower surface of the pad, and the boss is formed with a pair of refrigerant outlets connected to the pair of outlet pipes.

According to the refrigerant valve for a refrigerator according to the embodiment of the present invention, the following effects can be expected.

First, when the fixing member is mounted, the fixing member is restricted in the vertical flow by the leg portion, and the flow in the horizontal direction can be restricted by the side supporter. Therefore, there is an advantage that the second gear can be stably fixed and maintained in a fixed state.

Second, the fixing member is formed in a plate-like shape, and the plate-like fixing member is cut to form the elastic supporting portion, so that the second gear can be elastically supported and fixed. Therefore, there is an advantage that the assembling property of the second gear can be improved and stable fixing can be performed.

Thirdly, the elastic support portion can be inclinedly extended so that the second gear can be elastically supported while pressing the second gear, so that the second gear can be pressed with a constant force at all times, and even when the position is changed due to deformation or mis- Leakage can be prevented.

Fourthly, the elastic support part supports the center of the gear even when the gear is rotated, and the gear and the pad are not tilted at a specific angle due to the protruding shape of the pad projection part, so that the refrigerant does not leak, So that it can be maintained.

1 is a circuit diagram showing a refrigerant flow of a refrigerator according to an embodiment of the present invention.
2 is a perspective view of a refrigerant valve according to an embodiment of the present invention.
3 is an exploded perspective view of the refrigerant valve.
4 is a longitudinal sectional view of the refrigerant valve.
5 is an exploded perspective view showing a coupling structure of a first gear and a fixing member, a second gear and a pad, which are essential components of the refrigerant valve.
6 is a perspective view of the fixing member as viewed from above.
7 is a perspective view of the fixing member as viewed from below.
8 is a sectional view taken along line 8-8 'of FIG.
9 is a front view of the second gear.
10 is a bottom view of the pad.
11 is a plan view of the fixing member, the second gear, and the pad combined with each other.
12 is a side view of the fixing member, the second gear, and the pad combined.
13 is a view showing the open / closed state of the refrigerant outlet according to the operation of the refrigerant valve.
14 is a view showing the rotation state of the second gear according to the operation of the refrigerant valve.
FIG. 15 is a graph showing a leakage amount of the refrigerant valve according to an increase in pressure.
16 is a cross-sectional view showing a coupling structure of an elastic support portion and a gear boss of a refrigerant valve according to another embodiment of the present invention.
17 is a cross-sectional view showing a coupling structure of an elastic supporter and a gear boss of a refrigerant valve according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the embodiment shown in the drawings, and that other embodiments falling within the spirit and scope of the present invention may be easily devised by adding, .

1 is a circuit diagram showing a refrigerant flow of a refrigerator according to an embodiment of the present invention.

As shown in the figure, the refrigerator 1 according to the embodiment of the present invention includes a refrigerator cabinet forming a storage space divided into a refrigerating chamber and a freezing chamber, and a door (not shown) mounted to the refrigerator cabinet for independently opening and closing the refrigerating chamber and the freezing chamber, So that the overall appearance is formed.

On the other hand, a machine room is formed below the cabinet. A cooling fan 21 for promoting heat exchange between the compressor 10, the condenser 20 and the condenser 20 constituting the refrigeration cycle may be provided in the machine room. And a refrigerating room side capillary tube 31 and a freezing room side capillary tube 41 connected to the refrigerating compartment evaporator 30 and the freezing compartment evaporator 40 as required. A refrigerant valve 50 for switching the flow direction may be provided.

Of course, the refrigerated actual capillary 31, the freezer-compartment capillary 41, and the refrigerant valve 50 may be provided at positions other than the mechanical room, and the embodiment of the present invention is not limited to these configurations .

Meanwhile, a refrigerator compartment evaporator 30 and a freezer compartment evaporator 40 may be provided behind the refrigerator compartment and the freezer compartment to independently cool the refrigerating compartment and the freezer compartment. The refrigerating compartment evaporator 30 and the freezing compartment evaporator 40 are circulated in the freezing compartment and the freezing compartment to cool the inside of the refrigerator compartment and the freezing compartment, Lt; / RTI >

Meanwhile, the compressor 10 and the condenser 20, the refrigerating compartment evaporator 30, the freezing compartment evaporator 40, the refrigerating room side capillary 31, and the freezing room side capillary 41 are all connected by a refrigerant pipe to form a flow path , It is possible to circulate the refrigerant by forming a whole refrigeration cycle.

The refrigerant pipe may be provided with a refrigerant valve 50. The refrigerant may be selectively supplied to the evaporator 30 and the freezer compartment evaporator 40 by the refrigerant valve 50, So that the refrigerant supply can be shut off.

In detail, the outlet of the compressor 10 and the inlet of the condenser 20 are connected to each other by a refrigerant pipe, and a pipe connected to the outlet of the condenser 20 is branched and connected to the refrigerant evaporator 30, (40).

In this case, the refrigerant pipe is branched by the refrigerant valve 50, and the refrigerant valve 50 is composed of a three-way valve, and is connected to the outlet of the condenser 20 and the refrigerant-side capillary 31 and the freezing- And to be connected to the inlet of the capillary (41).

That is, according to the driving of the refrigerant valve 50, the refrigerant flowing into the refrigerant valve 50 can be selectively flowed toward the refrigerating chamber side capillary 31 or the freezing chamber side capillary 41. The refrigerating chamber capillary 31 and the freezing chamber capillary 41 are connected to the outlet of the refrigerant valve 50 and the inlet of the refrigerating chamber evaporator 30 and the freezing compartment evaporator 40, respectively.

2 is a perspective view of a refrigerant valve according to an embodiment of the present invention. 3 is an exploded perspective view of the refrigerant valve. 4 is a longitudinal sectional view of the refrigerant valve.

Referring to the drawings, the refrigerant valve 50 will be described in more detail. The refrigerant valve is formed in an overall shape by a case 100. The case 100 may be formed in a cylindrical shape having a bottom opening, and a plurality of structures may be disposed inside the case 100 to provide a space through which the refrigerant can flow.

The case 100 may include an upper portion 110 and a lower portion 120. The lower portion 120 may have a larger diameter than the upper portion 110. [ The upper portion 110 of the case 100 is formed to have a size capable of accommodating the motor 400 described below. The lower portion 120 of the case 100 is formed to have a size such that the fixing member 600 to be described below can be received therein.

The opened bottom surface of the case 100 can be shielded by the base plate 200. The base plate 200 forms a lower surface of the refrigerant valve 50. The base plate 200 is formed with a boss hole 210 to which a boss 300 to be described later is mounted and a coolant inlet port 220 that serves as a coolant inflow passage. An inlet pipe 60 for introducing the refrigerant is connected to the refrigerant inlet 220.

A boss 300 for supporting a pad 800 to be described later is mounted on the boss hole 210. The boss 300 is provided with a pair of refrigerant outlets 310 and 320 and the refrigerant outlets 310 and 320 are provided with a pair of refrigerant outlets 310 and 320 for supplying refrigerant to the refrigerant room evaporator 30 and the freezer room evaporator 40, The outlet pipes 310 and 320 are connected to each other.

The boss 300 may be coupled with the boss hole 210 in a threaded manner and may be fastened below the base plate 200. The upper surface of the boss 300 may be positioned to be equal to or slightly protruded from the upper surface of the base plate 200 in a state where the boss 300 is coupled to the boss hole 210. The top surface of the boss 300 is polished so that leakage of refrigerant does not occur upon contact with the pad 800 so that it can be hermetically sealed.

A shaft support hole 230 may be formed at the center of the base plate 200 to support a lower end of a motor shaft 410 which is a rotation axis of the motor 400.

A motor 400 may be installed on the upper portion 110 of the case 100. The motor 400 provides power for driving the valve and the motor shaft 410 and the first gear 500 are coupled to each other so that when the motor 400 is driven, . The motor 400 may be configured to be rotatable in the forward and reverse directions, so that the first gear 500 can also be rotated in the forward and reverse directions.

A motor support member 420 may be provided between the motor 400 and the inner upper surface of the case 100. The motor support member 420 may be formed by a disc-shaped disc improvement and presses one side of the motor 400 from above when the motor 400 is mounted inside the case 100. Accordingly, the motor 400 can be stably rotated in the case 100, and the motor shaft 410 of the motor 400 and the first gear 500 can be maintained in a coupled state . The motor support member 420 may be formed of a material or structure having elasticity, and may be configured to elastically support the motor 400 from above.

The first gear 500 is disposed at the center of the case 100, and is long in the vertical direction. The first gear 500 is formed to penetrate a center of a fixing member 600 provided inside the case and a gear portion 520 having a flat gear shape is formed at a lower end of the first gear 500 . The gear portion 520 may be positioned below the fixing member 600 through the center hole 630 of the fixing member 600 and may be gear-engaged with the second gear 700 described below .

The fixing member 600 may be received in the lower portion 120 of the case 100. The fixing member 600 is formed in a plate shape and is configured to be in contact with a plurality of points on the inner surface of the case 100 and is fixed in position so that the second gear 700 to be described below can be fixedly mounted do.

That is, the position of the first gear 500 and the second gear 700, which are in engagement with the fixing member 600, is also fixed by fixing the fixing member 600 in the case 100 And is held in the mounting position inside the case 100. [

The second gear 700 is provided below the fixing member 600 and can be coupled to the upper surface of the pad 800. [ A gear portion 720 having a flat gear shape is formed around the second gear 700 and meshed with the gear portion 520 of the first gear 500 to rotate together. The second gear 700 may be formed such that a gear shaft 710 disposed at a position away from the motor shaft 410 of the motor 400 is inserted therethrough.

The upper end of the gear shaft 710 may be fixed to the fixing member 600 and the lower end of the gear shaft 710 may be fixed to the upper surface of the boss 300. The gear shaft 710 may pass through the center of the second gear 700 and the pad 800.

A pad 800 is provided below the second gear 700. The pad 800 may be interposed between the second gear 700 and the boss 300. A pair of the refrigerant outlets 310 and 320 formed on the boss 300 by the rotation of the pad 800 may be selectively connected to the second gear 700 by being rotated together with the second gear 700, . The pad 800 may be formed of an engineering plastic material (PPS) having heat resistance and chemical resistance.

The structure of the first gear 500, the fixing member 600, the second gear 700 and the pad 800 provided in the case 100 will be described in more detail with reference to the drawings. do.

5 is an exploded perspective view showing a coupling structure of a first gear and a fixing member, a second gear and a pad, which are essential components of the refrigerant valve.

As shown in the figure, the first gear 500 may be disposed above the fixing member 600, and the second gear 700 may be disposed below the fixing member 600. The first gear 500 and the second gear 700 are respectively formed with gear portions 520 and 720 in the form of flat gears and are configured to be rotatable in engagement with each other.

In detail, a coupling portion 510, which can be coupled to the center of the motor 400, is formed on the first gear 500. At least one portion of the engaging portion 510 cut in the vertical direction may be formed and press-fitted into the lower end of the motor. The motor shaft 410 passes through the center of the first gear 500 to rotate the first gear 500 when the motor 400 is driven.

A gear portion 520 is formed at a lower portion extending downward of the first gear 500. In a state where the first gear 500 is mounted, And the gear portion 520 may be positioned below the center hole 630. The first gear 500 and the second gear 700 may be rotated in a space below the fixing member 600 by being engaged with each other by engagement between the gears 520 and 720.

6 is a perspective view of the fixing member as viewed from above. 7 is a perspective view of the fixing member as viewed from below. 8 is a sectional view taken along the line 8-8 'in Fig.

As shown in the figure, the fixing member 600 is formed in a circular plate shape as a whole. A plurality of leg portions 610 and pressing portions 653 may be formed around the fixing member 600.

The leg portion 610 is bent downward from the periphery of the fixing member 600 and extends downward. The lower end of the leg portion 610 is supported by the base plate 200. A plurality of the leg portions 610 may be formed. The length of the leg portion 610 is extended to allow the upper surface of the fixing member 600 to contact the upper surface of the lower portion 120 of the case 100.

That is, when the base plate 200 is coupled to the case 100 in a state where the fixing member 600 is disposed on the lower portion 120 of the case 100, And contacts the upper surface of the lower portion 120 of the case 100 and the lower end of the leg portion 610 contacts the base plate 200. Therefore, the fixing member 600 can maintain a stable mounting state without being vertically moved. The fixing member 600 is installed to provide a space between the lower portion of the fixing member 600 and the base plate 200 to maintain a constant gap therebetween.

The side supporters 620 may extend outward from the periphery of the fixing member 600, and a plurality of the side supporters 620 may be disposed at regular intervals. The side supporter 620 may be bent downward according to the shape of the lower portion 120 of the case 100. The lower end of the side supporter 620 extends away from the base plate 200 and contacts the inner circumferential surface of the lower portion 120 of the case 100.

Further, a protrusion 621 protruding outwardly may be further formed at an end of the side supporter 620. The protrusions 621 may be formed to protrude outward by forming on the side supporters 620 in a plate form. That is, when the fixing member 600 is mounted, the projection 621 comes into point contact with the outer surface of the lower portion 120 of the case 100, and the side supporter 620 applies tension to the fixing member 600 .

Accordingly, the fixing member 600 can be prevented from flowing in the horizontal direction, and tension can be provided to the plate-like fixing member 600 by the side supporter 620. A plurality of the pressing portions 653 may be provided, and the pressing portions 653 may be disposed at regular intervals along the circumference of the fixing member 600. The bending angle of the side supporter 620 is set such that when the fixing member 600 is mounted on the inner side of the lower portion 120 of the case 100 and the protrusion 621 is in contact with the side supporter 620, Direction to provide the tension to the fixing member 600. [0052] As shown in Fig.

A center hole 630 through which the first gear 500 passes is formed at the center of the fixing member 600. A cutout 640 is formed between the center hole 630 and the outer side of the fixing member 600 and an elastic support 650 is formed in an inner region of the cutout 640.

The incision 640 may be formed at an outer end of the fixing member 600 and may be formed between the portion where the leg portion 610 is located and the center hole 630. Therefore, the outer side of the fixing member 600 in which the incision part 640 is formed is supported by the leg part 610, so that the position can be maintained without sagging.

The resilient support portion 650 is located inside the cutout portion 640 and may extend along the cutout portion 640. The end of the resilient supporting portion 650 presses the upper end of the second gear 700 to keep the second gear 700 in contact with the pad 800. At this time, the elastic support portion 650 is configured to press down the second gear 700 by elasticity, so that the second gear 700 can be stably fixedly mounted.

The elastic supporter 650 includes an extension 651 extending from an inner end of the cutout 640 and an inclined portion 652 bent downward from an end of the extension 651, And a pressing portion 653 for pressing the second gear 700 at the end of the second gear 652. The elastic supporter 650 is formed in a plate-like shape, and one end of the elastic supporter 650 may be structurally elastic due to the fixed, bent and extended structure.

In detail, the extension 651 is formed on the same plane as the upper surface of the fixing member 600 around the cutout 640. The extension 651 may be formed along a predetermined length between the cutouts 640.

The inclined portion 652 may be formed to extend downward from the end of the extended portion 651 by a predetermined inclination and may extend to a central portion of the second gear 700. At this time, the end of the inclined portion 652 may be bent to be positioned by about 2.5 to 3 mm below the height of the extending portion 651.

Accordingly, when the second gear 700 is positioned at the end of the inclined portion 652, the inclined portion 652 can press the second gear 700, and the elastic support portion 650, the second gear 700 can be pressed by an elastic force.

The pressing portion 653 is formed at the end of the inclined portion 652. The pressing portion 653 is formed in a circular plate shape and an opening 654 through which the gear shaft 710 passes may be formed at the center of the pressing portion 653. Accordingly, the second gear 700 can be fixed in position by the gear shaft 710 passing through the pressing portion 653, and is pressed downward by the pressing portion 653, 700 and the pad 800 are in close contact with each other and the upper surface of the pad 800 and the upper surface of the boss 300 are in close contact with each other.

In addition, a reinforcing portion 660 may be further formed on the outer side of the incision portion 640. The reinforcing portion 660 may be formed by forming the upper surface of the fixing member 600 on the outer side of the cut portion 640 and may extend along the extending direction of the cut portion 640 and the elastic supporting portion 650 . It is possible to prevent deformation or sagging of the upper surface of the fixing member 600 outside the cutout portion 640 by the reinforcing portion 660 formed by forming.

9 is a front view of the second gear.

As shown in the figure, the second gear 700 is formed with a gear portion 720 having a spur gear shape along the outer surface of the gear. The gear portion 720 is formed to be able to rotate by engaging with the gear portion 520 of the first gear 500

A gear boss 730 protruding upward and downward is formed at the center of the second gear 700. The gear boss 730 protrudes up and down, and serves as the center of rotation of the second gear 700. That is, a shaft hole 733 is formed in the gear boss 730, and the gear shaft 710 is penetrated.

The upper surface of the gear boss 730 is in contact with the pressing portion 653 of the elastic supporting portion 650. The upper surface of the gear boss 730 may be a flat surface 731 and an inclined surface 732. The inclined surface 732 is formed such that a part of the upper surface of the gear boss 730 has a downward inclination. The inclined surface 732 may be formed at a position corresponding to the space 840 described below.

The inclined surface 732 is formed to have a downward inclination and is not in contact with the pressing portion 653 and the plane 731 excluding the inclined surface 732 is in contact with the pressing portion 653, The user can push downward the display panel 700 downward.

A plurality of pad fixing protrusions 740 are formed on the lower surface of the second gear 700. The pad fixing protrusions 740 are formed on the outer side of the gear boss 730 protruding downward, The dog can be formed in a downward direction.

At least one of the first and second gears 700 and 800 may be formed longer and inserted into a fixing hole 820 formed in the pad 800 so that the pad 800 can be closely fixed to the lower surface of the second gear 700 . That is, when the second gear 700 is rotated, the pad 800 may be rotated together with the second gear 700.

10 is a bottom view of the pad.

As shown in the figure, the pad 800 is formed in a disk shape and can be coupled with the second gear 700. A pad hole 810 for inserting the gear boss 730 is formed at the center of the pad 800 and the gear shaft 710 penetrates through the pad hole 810 to penetrate the boss 300 And can be coupled to the upper surface. Accordingly, the pad 800 can be rotated about the gear shaft 710.

A plurality of fixing holes 820 are formed on the outer side of the pad hole 810. The fixing hole 820 may be formed at a position corresponding to the fixing protrusion 621 by inserting the fixing protrusion 621 of the second gear 700. The plurality of fixing holes 820 may be formed in the shape of holes or grooves as needed, and a plurality of fixing holes 820 may be radially arranged around the pad holes 810.

The pad protrusion 830 is formed on the lower surface of the pad 800 to selectively open and close the two refrigerant outlets 310 and 320 formed in the boss 300. The remaining region where the pad protrusion 830 is not formed forms the space 840.

That is, the lower surface of the pad 800 is partly formed by the pad protrusion 830 protruding downward, and the pad protrusion 830 maintains contact with the upper surface of the boss 300, Is spaced apart from the upper surface of the boss (300) to form a space portion (840).

Therefore, when the pad protrusion 830 is positioned above the refrigerant outlets 310 and 320, the pad protrusion 830 shields the refrigerant outlets 310 and 320 from flowing out of the refrigerant outlets 310 and 320. When the pad 800 is rotated so that the pad protrusion 830 does not cover the refrigerant outlets 310 and 320, the refrigerant flowing through the space 840 is discharged through the refrigerant outlet 310 .

The pad protrusion 830 is formed in a part of the lower surface of the pad 800 in order to open and close the refrigerant outlets 310 and 320 while minimizing the friction with the upper surface of the boss 300. At this time, the shape of the pad protrusion 830 may be determined so as to have a size and a shape to simultaneously open and close the pair of refrigerant outlets 310 and 320.

11 is a plan view of the fixing member, the second gear, and the pad combined with each other. 12 is a side view showing the state where the fixing member, the second gear and the pad are engaged.

As shown in the drawing, the second gear 700 can be rotated by driving the first gear 500, and the gear shaft 710 passing through the second gear 700 can be rotated As shown in Fig.

The pad 800 may be coupled to a lower surface of the second gear 700 to be rotated together with the second gear 700. The lower surface of the pad 800 is in contact with the upper surface of the boss 300. The pad protrusion 830 is positioned at a position where the refrigerant outlets 310 and 320 of the boss 300 And can be selectively opened and closed.

The second gear 700 can be pressed downward by the elastic supporting part 650 and the entire lower surface of the pad protruding part 830 can be pressed against the boss 300 by the pressing of the elastic supporting part 650. [ It is possible to maintain the state of being in close contact with the upper surface.

The direction of the inclined surface 732 formed at the upper end of the gear boss 730 may be directed toward the space 840 outside the pad protrusion 830. The end of the resilient supporting portion 650 is inclined to the inclined surface 732 when the elastic supporting portion 650 presses the upper end of the gear boss 730 while the pad 800 is rotated and positioned at a specific position, The end portions of the inclined surface 732 and the elastic supporting portion 650 are spaced apart from each other and the inclined surface 732 is not pressed. Accordingly, the downward pressing force is not transmitted in the extending direction of the inclined surface 732, and the second gear 700 and the pad 800 can be prevented from being inclined toward the space 840 .

That is, even if the second gear 700 rotates, the space portion 840 is positioned in the extending direction of the elastic supporting portion 650 (right side in FIG. 12), the pressing force of the gear boss 730 The elastic supporter 650 is not in contact with the inclined surface 732 to prevent the second gear 700 from tilting.

Accordingly, the second gear 700 is not tilted at any time during the rotation process, and the refrigerant can be prevented from leaking through the space between the pad 800 and the upper surface of the boss.

Particularly, since the fixing member 600 is formed in a thin plate shape, a part of the fixing member 600 or the elastic supporting portion 650 may be deformed during the transportation or assembling process, and the second gear 700 May not be accurately pressed at the center of the display screen.

However, in the present embodiment, since the elastic supporter 650 is formed to be curved in a direction to press the second gear 700, even if some deformation occurs, the second gear 700 can be pressed and fixed by elastic deformation do. The second gear 700 and the pad 800 can be kept in close contact with the upper surface of the boss 300 without being inclined even in the inclined structure of the elastic supporter 650.

Hereinafter, the operation of the refrigerant valve of the refrigerator will be described with reference to the drawings.

13 is a view showing the open / closed state of the refrigerant outlet according to the operation of the refrigerant valve. 14 is a view showing the rotation state of the second gear according to the operation of the refrigerant valve.

As shown in the figure, the refrigerant valve 50 may have various operating states according to the operation conditions of the refrigerator. That is, the second gear 700 of the refrigerant valve 50 is rotated according to the operating condition of the refrigerator to selectively open and close the refrigerant outlets 310 and 320 to control the supply of the refrigerant.

13 (a), the second gear 700 is rotated so that the pad protrusion 830 of the pad 800 contacts the two refrigerant outlets (not shown) of the refrigerator compartment and the freezer compartment, 310 and 320, respectively. In this state, the pad protrusion 830 shields both of the two refrigerant outlets 310 and 320 so that the refrigerant valve 50 can block the refrigerant supply to the refrigerating compartment evaporator 30 and the freezing compartment evaporator 40 do.

In this state, the second gear 700 is in a state as shown in Fig. 14 (a). At this time, the end of the elastic supporter 650 presses the plane of the gear boss 730. The pressing force by the end portion of the elastic supporter 650 can be transmitted to the upper surface of the boss 300 through the pad protrusion 830. The pad 800 is disposed on the upper surface of the boss 300 And maintains a close contact state. 14 (a) is a view seen from a position opposite to the view of FIG. 14 (b) to FIG. 14 (d), and the contact state of the elastic supporter 650 and the gear boss 730 is more clearly shown I can see from the direction you can see.

13 (b), the second gear 700 is rotated so that the pad protrusion 830 of the pad 800 is positioned between the two cold air outlets 310 and 320 The cold air outlet 320 communicating with the freezer compartment evaporator 40 is opened and the cold air outlet 310 communicating with the refrigerating compartment evaporator 30 is shielded. In this state, the pad protrusion 830 shields only the cool air outlet 310 communicating with the refrigerating compartment evaporator 30, so that the refrigerant valve 50 is connected to the freezing compartment evaporator 40 through the cool air outlet 320 So that the refrigerant can be supplied to the evaporator of the freezer compartment.

In this state, the second gear is in a state as shown in FIG. 14 (b). At this time, the elastic supporter 650 presses the plane of the gear boss 730. The end of the elastic support portion 650 is spaced apart from the inclined surface 732 of the gear boss 730 so that the inclined surface 732 is not pressed.

When the second gear 700 is rotated so that the elastic portion 650 of the elastic protrusion 830 is positioned below the end of the elastic supporter 650, The pad 800 may be tilted, resulting in a leakage of the refrigerant.

In order to prevent such a problem, the elastic supporting portion 650 structurally presses only the center portion of the gear boss 730 or the plane 731 in the state of FIG. 14 (b), and the inclined surface 732 is not pressed do. Therefore, the pad 800 can be maintained in a state of being in close contact with the upper surface of the boss 300 without being inclined even in a position where the possibility of leakage of the refrigerant is high.

13 (c), the second gear 700 is rotated so that the pad protrusion 830 of the pad 800 contacts the two refrigerant outlets (not shown) 310 and 320 are all opened. In this state, the pad protrusion 830 opens all of the two refrigerant outlets 310 and 320 so that the refrigerant valve 50 can supply refrigerant to both the refrigerating compartment evaporator 30 and the freezing compartment evaporator 40 do.

In this state, the second gear is in a state as shown in FIG. 14 (c). At this time, the end of the elastic supporter 650 presses the plane of the gear boss 730. The pressing force by the end portion of the elastic supporter 650 can be transmitted to the upper surface of the boss 300 through the pad protrusion 830. The pad 800 is disposed on the upper surface of the boss 300 And maintains a close contact state.

13 (d), the second gear 700 is rotated so that the pad protrusion 830 of the pad 800 is positioned between the two cold air outlets 310 and 320 The cold air outlet 310 communicating with the refrigerating compartment evaporator 30 is opened and the cold air outlet 320 communicating with the freezing compartment evaporator 40 is shielded. In this state, the pad protrusion 830 shields only the cool air outlet 320 communicating with the freezer compartment evaporator 40, so that the refrigerant valve 50 is connected to the cool air outlet 310 connected to the refrigerator compartment evaporator 30 So that the refrigerant can be supplied to the refrigerator compartment evaporator 30 side.

In this state, the second gear 700 is in a state as shown in FIG. 14 (d). At this time, the end of the elastic supporter 650 presses the plane of the gear boss 730. The pressing force by the end portion of the elastic supporter 650 can be transmitted to the upper surface of the boss 300 through the pad protrusion 830. The pad 800 is disposed on the upper surface of the boss 300 And maintains a close contact state.

FIG. 15 is a graph showing a leakage amount of the refrigerant valve according to an increase in pressure.

In FIG. 15, in the state of the refrigerant valve 50 for the freezing compartment cooling operation as in FIGS. 13 (b) and 14 (b) structurally vulnerable to the leakage of the refrigerant, the refrigerant leakage amount .

As shown in the drawing, even if the pressure is increased, the leakage amount does not change much and remains low. Especially, even when the pressure is high, the leakage amount is increased only to a certain level. It is possible to maintain the close contact state.

Particularly, when the pad 800 is tilted due to a weak pressing force of the pad 800 in a pressure range of 3 to 5 kgf, which is an environment in which the refrigerant valve 50 is actually used, the leakage amount of the refrigerant greatly increases However, in the embodiment of the present invention, the leakage amount of the refrigerant is satisfied even at the pressure in the actual use area, and the pad 800 maintains a constant level. Therefore, the pad 800 is in close contact with the boss 300 to prevent leakage of the refrigerant. Can be seen.

Meanwhile, the refrigerant valve for a refrigerator according to the present invention may have various other embodiments other than the above-described embodiment.

Other embodiments of the present invention have the same structure as the other embodiments, except that the shape of the elastic support portion of the fixing member and the shape of the gear boss of the second gear, which are the main components of the above-described embodiment, are different. Therefore, other embodiments of the present invention are denoted by the same reference numerals as those of the above-described embodiment except for the elastic support portion and the gear boss, and a detailed description thereof will be omitted.

16 is a cross-sectional view showing a coupling structure of an elastic support portion and a gear boss of a refrigerant valve according to another embodiment of the present invention.

As shown in the drawing, in the refrigerant valve 50 according to another embodiment of the present invention, the gear boss 730 of the second gear 700 is pushed and fixed from above in the upper part of the second gear 700 An elastic support portion 670 is provided. At this time, the entire upper surface 733 of the gear boss 730 is formed in a planar shape.

The elastic support portion 670 is formed by cutting a part of the fixing member 600 and is formed in a plate shape and may be formed to be inclined toward the gear boss 730 of the second gear 700. A pressing portion 671 for pressing the gear boss 730 from above may be formed at an end of the elastic supporting portion 670.

A shaft opening 672 through which the gear shaft 710 passes may be formed at the center of the pressing portion 671 and may be formed to be recessed around the shaft opening 672. That is, the pressing portion 671 may be formed in a disc shape having the shaft opening 672 as a center, and may be formed in a shape that the central portion is most recessed by the forming.

The center portion of the pressing portion 653 can press the upper surface 733 of the gear boss 730 so that the gear boss 730 can be rotated regardless of the position of the second gear 700, As shown in FIG. That is, the pad 800 may have a structure in which a part of the pad 800 is always in contact with the upper surface 733 of the boss 300 without being tilted, thereby preventing leakage of the refrigerant. The upper surface 733 of the gear boss 730 is formed in a flat plane as a whole on the top surface and is not formed with an inclined surface.

The pressing portion 653 may be formed in a shape in which the center portion protrudes, or may have a shape in which a separate protrusion is formed in the center portion. In order to press the center portion of the gear boss 730 A variety of shapes can be made.

17 is a cross-sectional view showing a coupling structure of an elastic supporter and a gear boss of a refrigerant valve according to another embodiment of the present invention.

As shown in the drawing, in the refrigerant valve 50 according to another embodiment of the present invention, the gear boss 730 of the second gear 700 is pushed and fixed from above in the upper part of the second gear 700 An elastic support portion 680 is provided. At this time, the entire upper surface 733 of the gear boss 730 is formed in a planar shape.

The elastic support portion 680 is formed by cutting a part of the fixing member 600 and is formed in a plate shape and may be formed to be inclined toward the gear boss 730 of the second gear 700.

The elastic support portion 680 may include an inclined portion 681 extending toward the gear boss 730 of the second gear and a pressing portion 682 bent at the end of the inclined portion 681 . The pressing portion 682 may be bent so as to be parallel to the upper surface of the gear boss 730 and may be formed to have an arbitrary angle that is set to be in surface contact with the upper surface of the gear boss 730, have. A shaft opening 683 through which the gear shaft 710 passes is formed at the center of the pressing portion 682.

Accordingly, the entire surface of the pressing portion 653 can press the gear boss 730, so that the upper surface 733 of the gear boss 730 ) Uniformly. That is, the pad 800 may have a structure in which the pad protruding portion 830 protruding from the pad 800 is always in contact with the upper surface of the boss 300 without being tilted, thereby preventing leakage of the refrigerant.

Claims (15)

A case defining a space therein;
A base plate which shields the opened bottom surface of the case and has an inlet pipe through which the refrigerant flows and a pair of outlet pipes through which the refrigerant flows;
A motor provided inside the case;
A first gear connected to the motor shaft and rotated inside the case;
A second gear that is gear-engaged with the first gear and is interlocked with the first gear at a side of the first gear;
A pad coupled to the second gear and rotated together with the second gear to selectively open and close the pair of outlet pipes; And
And a fixing member fixed inside the case and formed in a plate shape, the second gear being rotatably mounted, and a fixing member elastically supporting a center portion of the upper end of the second gear.
The method according to claim 1,
Wherein:
And an elastic support portion that is cut outward from the outside of the fixing member to have a predetermined elasticity and has an end portion for pressing and supporting the gear boss at the upper end of the second gear.
3. The method of claim 2,
Wherein at least a part of the elastic support portion is formed so as to be inclined toward the gear boss.
The method of claim 3,
And a gear shaft passing through the gear boss is passed through the end of the elastic support portion.
The method of claim 3,
The lower surface of the gear pad
A pad protrusion protruding downward to open and close at least the pair of outlet pipes at the same time;
And a space portion spaced from a bottom surface of the base plate at an outer side of the pad projection portion.
6. The method of claim 5,
Wherein the gear boss has an inclined surface formed on the upper surface thereof so as to have a downward inclination toward the space portion,
And the inclined surface is spaced apart from an end of the elastic support portion.
The method of claim 3,
The elastic support portion
An inclined portion extending obliquely,
And a pressing portion for elastically supporting the gear boss of the second gear at the end of the inclined portion,
Wherein the pressing portion is formed downward toward the center portion through which the gear shaft of the second gear penetrates.
The method of claim 3,
And a protrusion protruded to press a center portion of the gear boss of the second gear is formed at an end of the elastic support portion.
The method of claim 3,
The elastic support portion
An inclined portion extending obliquely,
And a pressing portion that is bent at an end portion of the inclined portion and uniformly presses the entire upper surface of the gear boss of the second gear to elastically support the gear boss.
3. The method of claim 2,
In the fixing member,
A through hole through which the first gear is opened at the center of the fixing member;
A cutout portion cut along the elastic support for forming the elastic support portion;
And a reinforcing portion protruding from the outer side of the incising portion along the elastic supporting portion to reinforce the fixing member is further formed.
3. The method of claim 2,
And a leg portion extending downwardly around the fixing member to support the fixing member on the base plate.
12. The method of claim 11,
And a plurality of side supporters extending downwardly around the fixing member and being elastically supported on a side surface of the case to prevent the fixing member from flowing.
13. The method of claim 12,
In this case,
An upper portion in which the motor is accommodated,
And the lower portion of the upper portion is formed to be larger than the diameter of the upper portion, and a lower portion in which the fixing member is mounted.
The method according to claim 1,
And a boss which is in contact with a lower surface of the pad is mounted on the base plate,
Wherein the boss is formed with a pair of refrigerant outlets connected to the pair of outlet pipes.
15. The method of claim 14,
Wherein the pad further comprises a pad protrusion protruded downward so as to simultaneously open and close the pair of refrigerant outlets.
KR1020150156165A 2015-11-06 2015-11-06 Refigerant valve for refrigerator KR101753487B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150156165A KR101753487B1 (en) 2015-11-06 2015-11-06 Refigerant valve for refrigerator

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CN116568974A (en) 2020-11-26 2023-08-08 三星电子株式会社 Valve device

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