KR101419322B1 - Multi-way step valve - Google Patents

Abstract

An invention directed to a multi-directional step valve is disclosed. The disclosed multi-directional step valve includes a housing in which a single inflow hole and a plurality of discharge holes are formed and in which fluid is stored in the internal storage chamber, a stepping motor installed on one side of the housing, a shaft of the stepping motor is installed on a central portion of the housing, A driving gear that is coupled to the shaft and rotates; and an opening / closing unit that is selectively driven by the driving gear to shut off or open the plurality of exhaust holes.

Description

Multi-way step valve {MULTI-WAY STEP VALVE}

The present invention relates to a multi-directional step valve, and more particularly, to a multi-directional step valve in which a plurality of discharge holes for discharging refrigerant introduced from an inflow hole are extended by using pads respectively provided in two or more driven gears meshed with a drive gear Directional step valve capable of multi-directional control.

Generally, a Kimchi refrigerator is composed of a compressor, a condenser, an expansion device, and an evaporator as main components, constitutes a refrigeration cycle, and requires a storage item stored in a storage room through heat transfer between a heater and a storage room separately provided around the evaporator and storage room And is kept at a low temperature.

The kimchi refrigerator includes a direct cooling type (hereinafter referred to as "direct cooling type") cooling the storage compartment by using a pipe type evaporator arranged to surround the outer surface of the storage compartment according to a cooling system, an evaporator having a cooling fin on one side of the storage compartment, (Hereinafter referred to as "indirect cooling") in which cool air is supplied to the storage room by mounting a blower fan and driving the blower fan. Meanwhile, in recent years, a mixed type Kimchi refrigerator has been proposed in which a direct cooling type storage room and a hepatic cooling type storage room are mixedly applied.

As described above, a two-room type Kimchi refrigerator having two storage rooms, which is a storage room, is mainly applied. Recently, a four-room Kimchi refrigerator having four storage rooms has been proposed in order to meet the needs of users.

Each of the four storage rooms of the four-room Kimchi refrigerator is provided with respective evaporators, which are connected to four refrigerant pipes through two three-way step valves installed in a refrigerant pipe connected to the condenser So that the refrigerant is selectively supplied to each of the evaporators.

The conventional three-way step valve is configured to divide refrigerant flowing through one inlet pipe into two pipes. Therefore, when two three-way step valves are applied, refrigerant is supplied to four evaporators of a four-room type Kimchi refrigerator .

Japanese Patent Laid-Open No. 10-2010-0084715 has been proposed as an invention for a four-room type hybrid type Kimchi refrigerator having a conventional two-step valve.

Conventional 3-step step valves can supply refrigerant introduced through one inflow hole to two discharge holes by one pad. Therefore, it is necessary to apply two 3-step valve in 4-room refrigerator, It is possible to control the number of components and the material cost.

Therefore, there is a need to improve this.

The present invention has been made in view of the above-described need, and it is possible to expand a plurality of discharge holes for discharging the refrigerant introduced from the inflow holes by using the pads respectively provided in the two or more driven gears engaged with the drive gear Directional step valve that reduces the number of components and material cost.

The present invention provides a multi-directional step valve in which a plurality of pads provided on two or more upper surfaces of the driven gear meshed along the rotation angle of the drive gear selectively block or open a plurality of discharge ports to quickly control the supply of refrigerant The purpose is.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-directional step valve capable of firmly fixing a stator of a stepping motor and a housing using a coupling portion.

According to an aspect of the present invention, there is provided a multi-directional step valve comprising: a housing having one inlet hole and a plurality of outlet holes, the fluid being stored in the internal storage chamber; A stepping motor installed at one side of the housing; A driving gear provided on a central portion of the housing and having a shaft coupled to the shaft; And an opening / closing part which is driven by the driving gear to selectively block the plurality of exhaust holes.

The opening and closing part may include: a first driven gear meshing with one side of the driving gear; A second driven gear engaged with the other side of the driving gear; A first pad protruding in the shape of an irregular closed curve on the upper surface of the first driven gear and blocking or opening the first and second exhaust holes in accordance with rotation of the driving gear; And a second pad protruding in the shape of an irregular closed curve around the upper surface of the second driven gear and blocking or opening the third and fourth exhaust holes in accordance with rotation of the driving gear.

In addition, the first and second discharge holes opened and closed by the first pad are used for intercooling, and the third and fourth discharge holes opened and closed by the second pad are used for direct cooling.

The stepping motor may include: a stator wound with a coil; A rotor inserted into the hole of the stator and rotated by an electromotive force supplied to the stator, the magnet being provided; And a sealing case for fixing the rotor to the housing in a state of enclosing the rotor.

Further, the housing is coupled to the stator of the stepping motor by a binding portion.

In addition, the binding portion may include a plurality of hooks provided on the housing; And a latching jaw provided around the stator so as to be caught by the latching hook.

In addition, both sides of the latching jaw are provided with guiding jaws for guiding the entry of the latching hooks and preventing the latching hooks from being released in both directions.

As described above, in the multi-directional step valve according to the present invention, a plurality of discharge holes for discharging the refrigerant introduced from the inflow holes are extended by using pads respectively provided in two or more driven gears engaged with the drive gear It is possible to reduce the number of components and material cost by controlling the direction.

In the present invention, a plurality of pads provided on two or more upper surfaces of the driven gear meshed along the rotation angle of the drive gear selectively block or open a plurality of discharge ports, so that supply control of the refrigerant can be performed quickly.

The present invention can firmly fix the stator of the stepping motor and the housing by using the binding portion.

FIG. 1 is a state in which a multi-directional step valve according to the present invention is applied to a four-
2 is an exploded perspective view of a multi-directional step valve according to an embodiment of the present invention,
3 is a perspective exploded perspective view of a multi-way step valve according to one embodiment of the present invention.
4 is a schematic perspective view of a multi-directional step valve according to an embodiment of the present invention,
FIG. 5 is a schematic cross-sectional view of a main part of a multi-directional step valve according to an embodiment of the present invention,
6 (a) to 6 (e) are views sequentially showing an open state of a multi-directional step valve according to an embodiment of the present invention,
7 is a graph showing an operation principle according to a step rotation angle of a multi-directional step valve according to an embodiment of the present invention.

Hereinafter, a multi-directional step valve according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a state in which a multi-directional step valve according to the present invention is applied to refrigerator for four-room kimchi.

FIG. 2 is an exploded perspective view of a multi-directional step valve according to an embodiment of the present invention, and FIG. 3 is a perspective exploded perspective view of a multi-directional step valve according to an embodiment of the present invention. FIG. 4 is a schematic perspective view of a multi-directional step valve according to an embodiment of the present invention, and FIG. 5 is a schematic cross-sectional view of a main part of a multi-directional step valve according to an embodiment of the present invention.

6 (a) to 6 (e) are views sequentially showing the open state of the multi-directional step valve according to the embodiment of the present invention, and Fig. 7 is a cross- This graph shows the operation principle according to the rotation angle.

The multi-way valve 50 of the present invention can control the supply of various fluids including a refrigerant, and can be applied to a kimchi refrigerator, a general refrigerator, and various other devices. For convenience, the following embodiment will be described on the basis of application to a four-room type kimchi refrigerator. Further, the multi-way valve 50 of the present invention may have one inlet hole and four or more outlet holes, but the following description is based on a five-step valve having one outlet hole and four outlet holes.

Referring to FIG. 1, a four-room kimchi refrigerator having a multi-directional step valve according to an embodiment of the present invention includes a compressor 20, a condenser 30, a five-step valve 50, Third, and fourth capillary tubes 80, 82, 84, 86, and first, second, third, and fourth evaporators 90, 92, 94,

The compressor 20 is provided in the main body 10 and compresses the refrigerant passing through the receiving tube 22 at high temperature and high pressure.

The main body 10 is configured to form the outer shape of a kimchi refrigerator or a general refrigerator, and stores the kimchi or the general food at a temperature of image or subzero.

The main body 10 has first, second, third, and fourth storage rooms 12, 14, 16, and 18. The first, second, third, and fourth storage rooms (12, 14, 16, 18) may be changed in position as occasion demands.

The first storage chamber 12 is provided on the upper left side of the main body 10 and the second storage chamber 14 is provided on the upper right side of the main body 10. The third storage chamber 16, And the fourth storage chamber 18 is located on the lower side of the lower portion of the main body 10. [

At this time, the first and second storage rooms 12 and 14 are applied as a cold-cooled room having a closed door, and the third and fourth storage rooms 16 and 18 are applied as a direct-cooled room made of a slide type drawer.

Of course, depending on the case, all of the four storage rooms may be used by direct cooling, or all four storage rooms may be used by indirect cooling. In some cases, at least one of the storage rooms may be selected by direct cooling or indirect cooling.

The condenser (30) condenses the refrigerant transferred from the compressor (20) to a low temperature and a high pressure. That is, the condenser 30 moves the refrigerant through the pipeline and blows the cold air to the blowing fan to discharge the heat, thereby making the high-temperature, designed refrigerant low in temperature and high in pressure.

The five-way step valve 50 moves the condensed refrigerant in the condenser 30 to flow into one inlet pipe 32 and the first, second, third, and fourth outlet pipes 40, 42, 44, ).

The first, second, third, and fourth capillary tubes 80, 82, 84, 86 are configured to cool the refrigerant moving in the first, second, third, and fourth discharge tubes 40, , And low pressure.

The first, second, third, and fourth evaporators 90, 92, 94, and 96 are configured to cool refrigerant flowing in the first, second, third, and fourth capillary tubes 80, 82, Second, third, and fourth storage rooms (12, 14, 16, 18) through the first, second, third, and fourth discharge pipes to provide cool air.

The first evaporator 90 is connected to the first storage chamber 12 through the first discharge pipe 40 and the second evaporator 92 is connected to the second storage chamber 14 through the second discharge pipe 42.

The first storage chamber 12 and the second storage chamber 14 blow the cool air generated in the first evaporator 90 and the second evaporator 92 to the first blowing fan 13 and the second blowing fan 15, The state is used for cold cooling.

The first blowing fan 13 and the second blowing fan 15 are disposed at appropriate positions around the first storage chamber 12 and the second storage chamber 14.

The first storage compartment 12 and the second storage compartment 14 are disposed on the upper side of the main body 10 so as to be laterally disposed on the upper side of the main body 10, .

The third evaporator 94 and the fourth evaporator 96 are installed in a direct cooling type in which evaporation ducts are wound on the outer surfaces of the third storage chamber 16 and the fourth storage chamber 18. For convenience, the third storage chamber 16 and the fourth storage chamber 18 are disposed at the lower portion of the main body 10, respectively.

 2 to 7, a multi-directional step valve 50 according to an embodiment of the present invention includes a housing 52, a stepping motor 64, a drive gear 69, and an opening / closing part 70 .

The housing 52 has one inflow hole 32 and a plurality of discharge holes, and the fluid is stored in the internal storage chamber 63.

It is preferable that the number of the plurality of exhaust holes is four or more, and in the embodiment of the present invention, the four exhaust holes 56, 58, 60, .

The inflow hole 32 is connected to the inflow pipe 32 and the first, second, third and fourth discharge holes 56, 58, 60 and 62 are connected to the first, second, third, (40, 42, 44, 46) are connected.

The housing 52 is composed of two detachable parts and can be assembled or disassembled and the bottom 52 of the housing 52 in which the first, second, third, and fourth exhaust holes 56, 58, 60, The portion may be configured to be recessed at a predetermined depth.

The stepping motor 64 is installed on one side of the housing 52.

The stepping motor 64 includes a stator 65 wound with a coil and a rotor 66 inserted in a hole of the stator 65 and rotated by an electromotive force supplied to the stator 65, And a sealing case 67 for fixing the rotor 66 to the housing 52 in a state of enclosing the rotor 66.

The sealing case 67 can be inserted into the housing 52 to form a side surface portion of the storage chamber 63. It is preferable to apply a metal case which does not rust well to the sealing case 67, and it is particularly advantageous to apply aluminum material to the sealing case 67.

The housing 52 is engaged with the stator 65 of the stepping motor 64 by the binding portion 100.

The binding section 100 includes a plurality of hooks 102 provided in the housing 52 and a hooking protrusion 104 provided around the stator 65 so as to be hooked on the hooking hooks 102.

On both sides of the latching jaw 104, there is provided a guide protrusion 106 for guiding the entry of the latching hook 102 and preventing the latching hook 102 from being released in both directions.

The guide jaw 106 serves as a slot for guiding the engagement of the engagement hook 102. The guide jaw 106 prevents the engagement hook 102 from moving left and right even if an impact is applied to the step valve after assembly, From being removed.

The stepping motor 64 is supplied with electric power through a conductor (not shown) and senses the temperature of the temperature sensing units installed in the first, second, third, and fourth storage rooms 12, 14, Second, third, and fourth discharge holes 56, 58, 60, and 62 are selectively opened so that the first, second, third, and fourth discharge pipes 40, 44, and 46 to the first, second, third, and fourth evaporators 90, 92, 94, and 96, respectively.

Accordingly, the internal temperatures of the first, second, third, and fourth storage chambers 12, 14, 16, and 18 are controlled by one five-step valve 50.

The shaft of the stepping motor 64 is installed on the central portion of the housing 52, and is coupled to the shaft and rotated. The drive gear 69 is a pinion gear having gear teeth formed on its outer peripheral surface.

The opening and closing part 70 is configured to selectively block or open the first, second, third, and fourth exhaust holes 56, 58, 60, 62 by being driven by the driving gear 66.

The opening and closing part 70 includes a first driven gear 72 engaged with one side of the driving gear 69, a second driven gear 74 engaged with the other side of the driving gear 69, A first pad 76 protruding from the upper surface of the first drive gear 69 in the shape of an irregular closed curve and blocking or opening the first and second discharge holes 56 and 58 in accordance with rotation of the drive gear 69, And a second pad (not shown) which blocks or opens the third and fourth exhaust holes 60 and 62 in accordance with the rotation of the driving gear 69 78).

As the first and second driven gears 72 and 74 are formed larger than the diameter of the drive gear 69, more gear teeth are formed on the circumferential surface than the gear teeth of the circumferential surface of the drive gear 69.

6A and 7, when the rotational angle of the first and second pads 76 and 78 is 0 to 9 degrees from the reference point, the first, second, third, and fourth discharge holes 56, 58, 60, 62 are all opened by the first and second pads 76, 78. Here, the rotation angle reference point of the first and second pads 76 and 78 refers to 0 °, which is the starting point at which the first, second, third, and fourth exhaust holes 56, 58, 60, .

6 and 7, when the rotational angle of the first and second pads 76 and 78 is in the range of 57 to 75 degrees from the reference point, the fourth pad 62 Is opened, and the first, second, and third exhaust holes 56, 58, 60 are blocked by the first and second pads 76, 78.

That is, as the drive gear 69 rotates clockwise, the first pad 76 provided on the first driven gear 72 rotates counterclockwise and the second pad 76 provided on the second driven gear 74 78 are also rotated counterclockwise so that the fourth discharge hole 62 is opened and the first, second and third discharge holes 56, 58, 60 are blocked

6 (c) and FIG. 7, when the rotational angle of the first and second pads 76 and 78 is 127 to 145 degrees from the reference point, the first pad 76 presses the first discharge hole 56 And the second, third, and fourth exhaust holes 58, 60, 62 are blocked by the first and second pads 76, 78.

That is, as the drive gear 69 further rotates clockwise, the first pad 76 provided on the first driven gear 72 rotates counterclockwise and the second pad 76 provided on the second driven gear 74 rotates counterclockwise, The first discharge hole 56 is opened and the second, third, and fourth discharge holes 58, 60, and 62 are blocked

6 (d) and 7, when the rotational angle of the first and second pads 76 and 78 is 177 to 195 degrees from the reference point, the second pad 76 And the first, third, and fourth ejection holes 56, 60, 62 are blocked by the first and second pads 76, 78.

That is, as the drive gear 69 further rotates clockwise, the first pad 76 provided on the first driven gear 72 rotates counterclockwise and the second pad 76 provided on the second driven gear 74 rotates counterclockwise, The second exhaust hole 58 is also opened and the first, third and fourth exhaust holes 56, 60 and 62 are blocked.

6 (e) and FIG. 7, when the rotational angle of the first and second pads 76 and 78 is 267 to 285 ° from the reference point, the third pad 78 And the first, second and fourth discharge holes 56, 58 and 62 are blocked by the first and second pads 76 and 78, respectively.

That is, as the drive gear 69 further rotates clockwise, the first pad 76 provided on the first driven gear 72 rotates counterclockwise and the second pad 76 provided on the second driven gear 74 rotates counterclockwise, The third exhaust hole 60 is also opened and the first, second and fourth exhaust holes 56, 58 and 62 are blocked.

As described above, the first and second pads 76 and 78 provided on the first and second driven gears 72 and 74 rotate in the forward and reverse directions according to the stepwise rotation angle of the drive gear 69 operating in the forward or reverse direction, The first, second, third, and fourth discharge holes 56, 58, 60, and 62 can be selectively opened, and the first, second, third, and fourth discharge pipes 40, 46, and 46 to the first, second, third, and fourth evaporators 90, 92, 94, and 96 to selectively control the temperature of the four rooms.

The first driven gear 72 and the first pad 76 for blocking the first and second exhaust holes 56 and 58 are used for the intercooling and the third and fourth exhaust holes 60 and 62 are blocked The second driven gear 74 and the second pad 78 are preferably used for direct cooling.

The reason for this is that the fourth exhaust hole 62, the first exhaust hole 56, the second exhaust hole 56, and the second exhaust hole 56 are formed in accordance with the step rotation angle of the drive gear 69, The first exhaust hole 56 and the second exhaust hole 58 are opened in the order of the exhaust hole 58 and the third exhaust hole 60 so that the fourth exhaust hole 62 and the third exhaust hole The first discharge hole 56 and the second discharge hole 58 are preferably used for intercooling because the refrigerant supply is not accurate because the valve 60 is temporarily opened during the opening process.

Further, since the fourth exhaust hole 62 and the third exhaust hole 60 are located at both left and right sides of the graph, it is possible to accurately open the first exhaust hole 56 and the second exhaust hole 58 Since the refrigerant is supplied, it is preferable that the fourth discharge hole 62 and the third discharge hole 60 are used for direct cooling.

The first pad 76 and the second pad 78 may be formed into a peripheral shape to open or shut off three or more discharge holes. If the first pads 76 and the second pads 78 block or open the three exhaust holes formed in the housing 52, they will be used as a seven-step valve.

In addition, three or more pads may be provided on the driven gear engaged with the driving gear 69, and the pads provided on the driven gear. If it is configured to open or shut off three or more vent holes, it can be used as a step valve with 9 or more chambers.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the following claims.

10: main body 12, 14, 16, 18: first, second, third,
20: compressor 22:
30: condenser 32: inlet pipe
40, 42, 44, 46: first, second, third,
50: 5 -step step valve 52: housing
54: inflow hole 56, 58, 60, 62: first, second, third,
63: storage chamber 64: stepping motor
65: stator 66: rotor
77: sealing case 69: driving gear
70: opening and closing part 72: first driven gear
74: second driven gear 76: first pad
78: second pad 80, 82, 84, 86: first, second, third and fourth capillaries
90, 92, 94 and 96: first, second, third and fourth evaporators
100: binding portion 102: hooking hook
104: jaw jaw 106: guide jaw

Claims (7)

A housing in which an inflow hole and a plurality of discharge holes are formed, and a fluid is stored in the internal storage chamber;
A stepping motor installed at one side of the housing;
A driving gear provided on a central portion of the housing and having a shaft coupled to the shaft;
And an opening / closing part which is driven by the driving gear to selectively block or open the plurality of exhaust holes,
Wherein the opening / closing portion includes: a first driven gear meshing with one side of the driving gear;
A second driven gear engaged with the other side of the driving gear;
A first pad protruding in the shape of an irregular closed curve on the upper surface of the first driven gear and blocking or opening the first and second exhaust holes in accordance with rotation of the driving gear; And
And a second pad which protrudes in the shape of an irregular closed curve on the side surface of the second driven gear and blocks or opens the third and fourth exhaust holes in accordance with rotation of the driving gear,
Second, and third discharge holes sequentially in accordance with the step rotation angle of the drive gear,
The first and second exhaust holes are opened and closed by the first pad, and the first and second exhaust holes located in the middle of the exhaust hole are temporarily opened in the fourth and third exhaust hole opening processes,
And the fourth and third exhaust holes located on both sides of the four exhaust holes are opened and closed by the second pad.
delete The method according to claim 1,
The first and second discharge holes opened and closed by the first pad are used for intercooling,
And the third and fourth exhaust holes opened and closed by the second pad are used for direct cooling.
The method according to claim 1,
The stepping motor includes:
A stator wound with a coil;
A rotor inserted into the hole of the stator and rotated by an electromotive force supplied to the stator, the magnet being provided; And
And a sealing case for fixing the rotor to the housing in a state of enclosing the rotor.
The method according to claim 1 or 4,
Wherein the housing is bound to a stator of the stepping motor by a binding portion.
6. The method of claim 5,
The binding portion
A plurality of hooks provided on the housing; And
And a latching jaw provided around the stator so as to be caught by the latching hook.
The method according to claim 6,
And a guide jaw provided on both sides of the latching jaw for guiding the entry of the latching hook and preventing the latching hook from being released in both directions.

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