KR101380762B1 - Method for controlling complexed storage with 5 way step valve - Google Patents

Abstract

The present invention relates to a control method of a mixed reservoir having a five-way step valve, wherein a cooling chamber of a mixed reservoir having a five-way step valve having one inlet pipe and four discharge pipes is connected to an adjacent discharge pipe in order of opening and closing. By determining the cooling conditions of the control temperature by compensating the control temperature, even if the refrigerant is supplied due to unnecessary opening and closing of the discharge pipe located in the middle can minimize the deviation of the internal temperature.

Description

METHOD FOR CONTROLLING COMPLEXED STORAGE WITH 5 WAY STEP VALVE

The present invention relates to a control method of a mixed reservoir having a five-way step valve, and more particularly, to open and close the opening and closing sequence of the mixed reservoir having a five-way step valve having one inlet pipe and four discharge pipes. The present invention relates to a control method of a mixed reservoir having a five-way step valve that performs cooling by determining a cooling condition of connected side storage rooms to compensate for a control temperature.

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. On the other hand, in recent years, a mixed storage for mixing and applying a direct cooling room and an intercooling room has been proposed.

In addition, the mixed storage can be divided into Kimchi Storage Room and Refrigerated Refrigeration Room according to the usage of each room, so that Kimchi Storage Room can store Kimchi and other refrigerated foods. It is set to store frozen or refrigerated food.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2010-0084715 (2010.07.28.) "Composite Kimchi Refrigerator".

As described above, in a mixed storage pool having a plurality of storage rooms, a step valve for selectively supplying refrigerant supplied to each storage room is applied for independent control.

When the step valve drives the step motor, as the step motor rotates and the inner pad opens and closes each discharge pipe, the refrigerant introduced through the inlet pipe is selectively discharged to the discharge pipe, thereby controlling the amount of rotation of the step motor. Refrigerant can optionally be supplied to the room.

At this time, the step valve opens and closes the discharge pipe while operating in the clockwise and counterclockwise direction from the origin to the stop point range without continuing to rotate in one direction. While the refrigerant is supplied there is a problem that unwanted cooling occurs.

The present invention has been made to solve the above problems, the cooling conditions of the two sides of the storage room connected to the exhaust pipe adjacent to the opening and closing sequence when the cooling operation of the mixed reservoir having a five-way step valve having one inlet pipe and four discharge pipes It is an object of the present invention to provide a control method of a mixed reservoir having a 5-way step valve that performs cooling by determining the compensation temperature.

According to an aspect of the present invention, there is provided a method for controlling a mixed reservoir having a 5-way step valve, which includes a first inlet pipe and a first through fourth outlet pipe through which refrigerant is introduced, and rotates from an origin point to a stop point for each step. Temperature control of a mixed reservoir having a 5-way step valve connected to the first to fourth evaporators of the first to fourth storage rooms to the first to fourth discharge pipes of the 5-way step valve for discharging the refrigerant while the discharge pipe is sequentially opened and closed. In the method; Determining, by the control unit, cooling conditions of both side storage rooms in the case of the second storage room and the third storage room; When the cooling conditions of both storage rooms are satisfied, the compensation control temperature is set to the cooling conditions of the second storage room or the third storage room, and otherwise, the normal control of the cooling conditions of the second storage room or the third storage room is performed. Setting to temperature; And performing, by the controller, cooling according to the cooling conditions, wherein the compensation control temperature is set higher than the normal control temperature.

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In the present invention, the compensation control temperature and the normal control temperature are set independently of each other for the first to fourth storage rooms.

In the present invention, the 5-way step valve is characterized in that the first to fourth discharge pipe opening and closing while reciprocating within the range of the origin and stop point.

The present invention is to perform the cooling by determining the cooling conditions of both sides of the storage room connected to the discharge pipe when the opening and closing sequence is connected to the adjacent discharge pipe when performing the cooling of the mixed reservoir having a five-way step valve having one inlet pipe and four discharge pipe Unnecessary opening and closing of the discharge pipe located in the middle, even if the refrigerant is supplied can be minimized the deviation of the internal temperature.

1 is a block diagram illustrating a control device of a mixed reservoir having a 5-way step valve according to an exemplary embodiment of the present invention.
Figure 2 is a graph showing the opening and closing state of the discharge pipe according to the step of the 5-way step valve according to an embodiment of the present invention.
3 is a flowchart illustrating a method of controlling a mixed reservoir having a 5-way step valve according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a control method of a mixed reservoir having a 5-way step valve according to the present invention. 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.

1 is a block diagram showing a control device of a mixed reservoir having a 5-way step valve according to an embodiment of the present invention, Figure 2 is a discharge pipe according to the step of the 5-way step valve according to an embodiment of the present invention It is a graph showing the opening and closing state.

As shown in FIG. 1, a control device for a mixed reservoir having a 5-way step valve according to an exemplary embodiment of the present invention includes a compressor 10, a 5-way step valve 30, and first to fourth temperature sensors 61 ˜. 64) and a controller 70.

Looking at the refrigerant circulation state of the mixed reservoir 100 shown in FIG. 1, the refrigerant compressed in the compressor 10 is condensed in the condenser 20 and then branched through the 5-way step valve 30, and the 5-way step valve ( The refrigerant selectively branched at 30 flows back to the compressor 10 through any one of the first to fourth evaporators 51 to 54 via any one of the first to fourth expansion devices 41 to 44. It will cycle.

At this time, the 5-way step valve 30 has an inlet pipe 35 through which the refrigerant flows and the first to fourth discharge pipes 31 to 34, and rotates from the origin to the stop point, and the first to fourth discharge pipes for each staff ( 31 to 34 are sequentially opened and closed to discharge the refrigerant.

Therefore, the controller 70 measures the internal temperature of the high temperature through the first to fourth temperature sensors 61 to 64 provided in the first to fourth storage rooms 110 to 140, and when any one of the cooling conditions is satisfied. The compressor 10 is driven and the 5-way step valve 30 is controlled to open the discharge pipe connected to the storage room that satisfies the cooling condition.

In this case, the cooling condition means a condition for opening the discharge pipe according to the control temperature set in order to maintain the storage room at the target temperature in the controller 70.

Therefore, the discharge pipe is opened when the cooling conditions are satisfied, and the discharge pipe is closed when not satisfied.

As illustrated in FIG. 2, the 5-way step valve 30 sequentially opens and closes the first to fourth discharge pipes 31 to 34 while the step motor (not shown) rotates.

That is, as the rotation amount of the 5-way step valve 30 is adjusted, only the first discharge pipe 31 is opened at the A step, only the second discharge pipe 32 is opened at the B step, and the third discharge pipe 33 is opened at the C step. ) Is opened and only the fourth discharge pipe 34 is opened at the D step.

As described above, only one of the first to fourth discharge pipes 31 to 34 is opened for each step according to the rotation of the step motor, and the other discharge pipe is closed.

At this time, the 5-way step valve 30 is clockwise because it opens and closes the first to fourth discharge pipes 31 to 34 while operating clockwise and counterclockwise within the range of the origin and the stop point without continuously rotating in one direction. When rotating from the origin to the stop point, the first discharge pipe 31, the second discharge pipe 32, the third discharge pipe 33, and the fourth discharge pipe 34 are opened and closed in sequence, but are counterclockwise. When the rotation from the stop point to the origin is opened and closed in the order of the fourth discharge pipe 34-> the third discharge pipe 33-> the second discharge pipe 32-> the first discharge pipe (31).

If the first discharge pipe 31 and the fourth discharge pipe 34 are alternately opened and closed, the 5-way step valve 30 reciprocates clockwise and counterclockwise while the first discharge pipe 31 and the fourth discharge pipe 34 are rotated. ) Will be opened and closed.

However, since the 5-way step valve 30 must pass while opening and closing the second discharge pipe 32 and the third discharge pipe 33 in order to open and close the first discharge pipe 31 and the fourth discharge pipe 34. The refrigerant is partially supplied through the second discharge pipe 32 and the third discharge pipe 33.

Therefore, in the case of the second storage room 120 and the third storage room 130 connected to the second discharge pipe 32 and the third discharge pipe 33, the internal temperature of the refrigerator is lower than the target temperature.

In the storage room connected to the discharge pipe of the intermediate position as described above, when the storage rooms on both sides are cooled, the step motor of the 5-way step valve 30 reciprocates and alternately opens and closes the discharge pipe connected to the storage rooms on both sides. By temporarily opening and closing the discharge pipe of the refrigerant flow into the evaporator of the intermediate position to lower the target temperature.

Since the coolant is temporarily introduced and the target temperature is lowered, the storage room at the intermediate position is controlled to maintain the target temperature by compensating and setting the control temperature according to the cooling conditions of the storage rooms on both sides.

3 is a flowchart illustrating a method of controlling a mixed reservoir having a 5-way step valve according to an exemplary embodiment of the present invention.

As shown in Figure 3, the control method of the mixed reservoir having a five-way step valve according to an embodiment of the present invention, the control unit 70 according to the opening and closing sequence of the second discharge pipe 32 and the third discharge pipe ( In the case of the second storage room 120 and the third storage room 130 connected to 33), the cooling conditions of both storage rooms are determined (S10).

For example, the opening and closing sequence of the 5-way step valve 30 is in the order of the first discharge pipe 31 <-> the second discharge pipe 32 <-> the third discharge pipe 33 <-> the fourth discharge pipe 34. In the case of the second storage room 120 connected to the second discharge pipe 32 when opened and closed, the first storage room 110 and the third storage room 130 connected to the first discharge pipe 31 and the third discharge pipe 33 are closed. The storage spaces on both sides thereof, the third storage room 130 connected to the third discharge pipe 33, the second storage room 120 and the fourth storage connected to the second discharge pipe 32 and the fourth discharge pipe 34 Room 140 becomes a storage room on both sides.

However, in the case of the first discharge pipe 31 and the fourth discharge pipe 34, since the 5-way step valve 30 does not rotate continuously in one direction, it operates clockwise and counterclockwise within the origin and stop ranges. In the case of the first storage room 110 connected to the first discharge pipe 31 and the fourth storage room 140 connected to the fourth discharge pipe 34, storage rooms on both sides thereof do not exist.

As described above, when the cooling conditions of both sides of the storage room are determined and the cooling conditions are both cooling conditions, the cooling conditions of the second storage room 120 or the third storage room 130 are set to the compensation control temperature (S20) (S30). ).

However, if only one of the cooling conditions is set to the normal control temperature for the cooling conditions of the second storage room 120 or the third storage room 130 (S40).

At this time, the compensation control temperature and the normal control temperature are set independently for the first to fourth storage rooms 110 to 140, and the compensation control temperature is set higher than the normal control temperature to compensate for the temperature caused by the temporary inflow of the refrigerant. Set it to high.

Thereafter, the controller 70 performs cooling of the second storage room 120 and the third storage room 130 according to the set cooling condition (S50).

In the control method of the mixed reservoir having the 5-way step valve as described above, in the case of the storage room connected to the discharge pipe of the intermediate position according to the opening and closing sequence of the 5-way step valve 30, the cooling conditions of both sides of the storage room are judged. In the case of cooling by adjusting the control temperature high, it is possible to minimize the temperature change caused by the refrigerant flowing in while cooling the storage of both sides.

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 technical scope of the present invention should be defined by the following claims.

10: Compressor
20: condenser
30: 5-way step valve
31 ~ 34: 1st to 4th discharge pipe
35: inlet pipe
41 ~ 44: 1st to 4th expansion device
51 ~ 54: 1st-4th evaporator
61 ~ 64: 1st to 4th temperature sensor
70:
100: mixed storage
110 ~ 140: 1st-4th Storage Room

Claims (4)

The first to fourth discharge pipes having an inflow pipe and a first to fourth discharge pipes into which the refrigerant flows are rotated from an origin point to a stop point, and the first to fourth discharge pipes are sequentially opened and closed for each staff to discharge the refrigerant. A method for controlling the temperature of a mixed reservoir having a 5-way step valve connected to the first to fourth evaporators of the first to fourth storage rooms, respectively, in a first to fourth discharge pipe;
Determining, by the control unit, cooling conditions of both side storage rooms in the case of the second storage room and the third storage room;
If the cooling conditions of both side storage rooms are satisfied, the cooling conditions of the second storage room or the third storage room are set to a compensation control temperature. Otherwise, the cooling of the second storage room or the third storage room is performed. Setting to a normal control temperature for the condition; And
The control unit further comprises the step of performing the cooling in accordance with the cooling conditions,
And the compensation control temperature is set higher than the normal control temperature.
delete The method of claim 1, wherein the compensation control temperature and the normal control temperature are independently set for the first to fourth storage rooms.
The control method according to claim 1, wherein the 5-way step valve opens and closes the first to fourth discharge pipes while reciprocating within a range of origin and stop points.

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