JP2003294347A - Refrigerator and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize a rise in a storage inside temperature, and to guarantee stability in restarting time of a compressor when driving of the compressor is stopped by abnormality of the compressor. <P>SOLUTION: This refrigerator and its control method include: at least one storage room; an evaporator cooling the storage room, the compressor; and a compressor driving part supplying a driving power to the compressor. The refrigerator is characterized by including: a heater for heating a prescribed part; a heater driving part supplying the driving power to the heater; a temperature sensing part sensing a room inside temperature of the storage room; and a control part cutting off the driving power from the heater driving part to the heater when determining that the room inside temperature of the storage room sensed via the temperature sensing parts rises to a prescribed preset temperature or more in a state of supplying cold air to the storage room via the evaporator by driving the compressor by the compressor driving part. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly, when the compressor is stopped due to an abnormality in the compressor, the temperature rise in the refrigerator is minimized and the compressor is stable when restarted. Regarding refrigerators that guarantee sex.

[0002]

2. Description of the Related Art Generally, a cooling system circulates a refrigerant through a compressor and supplies cold air to each storage chamber by the circulating refrigerant, so that food and drink can be stored for a long time.

The refrigerating cycle of the refrigerator is, as shown in FIG. 1, a compressor 24, a condenser 130 and an evaporator 151a, 1a.
51b is included. The gaseous refrigerant compressed in the compressor 24 to high temperature and high pressure is provided to the condenser 130 through the connecting pipe, and the refrigerant provided to the condenser 130 is liquefied to normal temperature and high pressure through a heat dissipation process, and the solenoid valve 114a. , 114b to the evaporators 151a and 151b provided in the storage chamber, respectively. The refrigerant is the evaporator 151.
The latent heat of the surroundings is taken while being vaporized by a and 151b to cool the storage chamber. Thus, the evaporators 151a, 151
The refrigerant vaporized in b is further collected in the condenser 130 and returns to the compressor 24, whereby the first refrigeration cycle is completed.

Here, temperature sensors 112a and 112b for sensing the temperature inside the storage chambers are provided in the respective storage chambers, and solenoid valves 114a and 114b are provided so that the temperature of the storage chambers set by the user is maintained. The temperature of the plurality of storage chambers can be adjusted by controlling the temperature of the storage chamber to control the cold air supplied to the storage chambers.

The compressor 24 of such a refrigeration cycle includes an overload circuit breaker (hereinafter referred to as "OLP").
Is provided so that when the compressor 24 is overloaded, the power supply to the compressor 24 is cut off so that the operation is stopped. Therefore, during operation of the refrigeration cycle,
When the compressor 24 is overloaded, the OLP is activated and the operation of the compressor 24 is stopped. When the driving of the compressor 24 is stopped, the circulation of the refrigerant is stopped and the cold air is not supplied to the storage chamber.

On the other hand, in such a refrigerator, when the refrigeration cycle is driven, a defrost heater for removing frost from the evaporator 151 and a frost generated due to a temperature difference between the inside and the outside of the storage chamber in a portion adjacent to the door. A heater is provided to remove the. In particular, the Kimchi refrigerator has a heater for supplying warm air to the storage room for aging the food, and the drawer type Kimchi refrigerator uses the drawer (DRAWE
The heater is moved so that frost does not occur in the door sliding bearing that guides the sliding of R).

However, when the compressor is stopped due to an abnormality in the compressor or the OLP operates due to overload during the operation of the refrigeration cycle, the cold air supply is interrupted, but the heater is Operated as before, which leads to an increase in the temperature of the refrigerator compartment. The rise in the internal temperature not only deteriorates the stored food, but also acts as a heat load when the compressor is re-operated.

[0008]

SUMMARY OF THE INVENTION Therefore, the present invention guarantees a minimum temperature rise in the refrigerator and stability when the compressor is re-operated when the compressor is stopped due to an abnormality in the compressor. The purpose is to provide a refrigerator that can.

[0009]

In order to solve the above-mentioned problems, according to a main aspect of the present invention, at least one storage chamber, an evaporator for cooling the storage chamber, a compressor,
A heater that heats a predetermined part in a refrigerator including a compressor driving unit that supplies driving power to the compressor;
A heater driving unit that supplies driving power to the heater;
A temperature sensing unit for sensing an indoor temperature of the storage chamber; a temperature driving unit for driving the compressor to supply cold air to the storage chamber through the evaporator; A control unit for interrupting the supply of driving power from the heater driving unit to the heater when it is determined that the sensed room temperature of the storage chamber has risen above a predetermined set temperature; A refrigerator characterized by the above is provided.

Here, at least one of a defrost heater for defrosting the evaporator and a heater for heating the door sliding bearing may be included.

The control unit further includes a valve for adjusting the amount of refrigerant flowing into the evaporator; the control unit is driving the compressor by the compressor driving unit, and the valve is open. In some cases, if it is determined that the room temperature of the storage room sensed by the temperature sensing unit is higher than a predetermined set temperature, driving power from the heater driving unit is provided to the heater. Can be shut off.

In order to solve the above-mentioned problems, according to another aspect of the present invention, at least one storage chamber, an evaporator for cooling the storage chamber, and an amount of refrigerant flowing into the evaporator are adjusted. A valve, a compressor, a compressor drive unit that supplies drive power to the compressor, and shuts off the drive power supply from the compressor drive unit to the compressor when the compressor is overloaded. A method for controlling a refrigerator including an overload cutoff unit and a heater for dissipating hot air; determining whether the compressor driving unit is driving the compressor; If it is, determining whether the valve is opened to supply cold air to the storage chamber; and if cold air is supplied to the storage chamber,
Sensing whether the room temperature of the storage room sensed by the temperature sensing unit has risen above a predetermined set temperature; sensing that the room temperature has risen above a predetermined set temperature And a step of stopping the operation of the heater, the method of controlling the refrigerator is provided.

[0013]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a control block diagram of the refrigerator according to the present invention. As shown in the drawings, a refrigerator according to the present invention includes a temperature sensing unit 12 that senses a temperature in a storage chamber, and a valve sensing unit 14 that senses an on / off state of a valve that regulates the amount of cold air supplied to the storage chamber. The heater driving unit 16 that drives a plurality of heaters 18 for performing functions such as defrosting and aging, the compressor 24, the compressor driving unit 20 that supplies driving power to the compressor 24, and the compressor 24. When an overload is applied, the heater driving unit 1 is operated according to the OLP 22 that shuts off the power supplied from the compressor driving unit 20 to the compressor 24 and the sensing results from the temperature sensing unit 12 and the valve sensing unit 14.
6 and the control unit 10 that controls the compressor drive unit 20.

The temperature sensing unit 12 senses the temperature inside the storage chamber and provides the sensing value to the control unit 10. The valve sensing unit 14 is
It senses whether a valve for controlling the amount of cold air supplied to the storage chamber is opened and provides the control unit 10 with the sensing result. The valve is opened and closed under the control of the control unit 10 so that the refrigerant is selectively supplied to the evaporator. Therefore, the control unit 10 can adjust the temperature in the storage chamber by controlling the opening / closing of the valve according to the temperature value in the storage chamber sensed by the temperature sensing unit 12.

The heater 18 is a defrosting heater for removing frost from the evaporator, a heater for removing frost caused by a temperature difference between the inside and outside of the storage chamber, a heater for aging food, etc. including. In addition, the drawer type kimchi refrigerator is provided with a heater provided so that frost does not occur in the door sliding bearing that guides the sliding of the drawer, but the technique according to the present invention is applicable to all heaters applied to the refrigerator. Can be applied to.

The compressor drive unit 20 supplies drive power to the compressor 24 under the control of the control unit 10 to drive the compressor 24. When the compressor 24 is driven, the cooling cycle is activated to supply cold air to the storage compartment.

The OLP 22 shuts off the power supplied to the compressor 24 from the compressor drive unit 20 when the compressor 24 is overloaded. A bimetal or the like is used as the OLP 22 and operates independently of the control of the control unit 10. Therefore, when the compressor 24 is overloaded, it is turned on. OLP2
2 is turned on, the drive power supplied to the compressor 24 is cut off, the drive of the compressor 24 is stopped, and if the overload is removed after a predetermined time, the OLP 22 is automatically turned off. Then, the drive power from the compressor drive unit 20 is supplied to the compressor 24. Like this, OLP2
Since 2 operates independently of the control unit depending on the load state of the compressor 24, the control unit 10 cannot directly detect the state of the OLP 22.

Therefore, the control unit 10 controls the compressor drive unit 20.
Detects the on / off state of the compressor 24 based on whether or not the drive power is supplied to the compressor 24, and the valve detector 14
The temperature of the storage chamber is continuously monitored through the temperature sensing unit 12, while the state of the valve is checked to determine whether the cool air is supplied to the storage chamber.

Here, in the steady state, it is determined that the compressor drive unit 20 is supplying drive power to the compressor 24, and if the valve is opened and cool air is supplied to the storage chamber, The temperature in the storage chamber sensed by the temperature sensing unit 12 is kept low.

However, due to the overload of the compressor 24, the OLP
22 is operating, the compressor drive 20 is
Drive power is supplied to the compressor 4, but the drive power supplied from the compressor drive unit 20 is cut off by the OLP 22 and the compressor 2
4 is not driven.

Therefore, the control unit 10 determines that the valve is opened and the cool air is supplied to the storage chamber while the compressor driving unit 20 supplies the driving power to the compressor 24. If the temperature in the storage chamber sensed by the temperature sensing unit 12 rises above a predetermined reference temperature, it is determined that the compressor 24 is stopped due to overload, and the heater 18 is not driven by the heater driving unit 16. To control.

The operation sequence of the refrigerator having the above structure according to the present invention is as shown in FIG. When power is supplied to the refrigerator, the cooling function of the refrigerator is performed while the refrigeration cycle is moved (S10). When the refrigerator is being driven, the door is opened or the heat radiation is poor, and the compressor 24 is overloaded (S12). OLP2 when compressor 24 is overloaded
2 is turned on, and the compressor drive unit 20 to the compressor 24
The drive power to the power source is cut off (S14). As a result, the driving of the compressor 24 is stopped (S16), and the supply of cold air is interrupted. If the supply of cold air is interrupted, the heater 18 is also stopped from being driven by the control of the controller 10 (S18).

As described above, in the refrigerator according to the present invention, when the driving of the compressor 24 is stopped due to some abnormality in compression,
By turning off the various heaters 18, the temperature inside the storage chamber is prevented from rising rapidly.

Such a series of processes is performed under the control of the control unit 10, and the control flow of the control unit 10 at this time is shown in FIG. When the drive of the refrigeration cycle starts (S40), the control unit 10 causes the compressor drive unit 20 to move to the compressor 2
It is determined whether or not driving power is being supplied to S4 (S4)
2). When the compressor driving unit 20 supplies the driving power to the compressor 24, the control unit 10 determines whether the valve is opened through the valve sensing unit 14 (S44). When the compressor driving unit 20 supplies the driving power to the compressor 24 and the valve is also opened, the control unit 10 monitors the sensed value input through the temperature sensing unit 12 to keep the temperature in the storage chamber at a predetermined level. It is determined whether the temperature is equal to or higher than the reference temperature of (S4).
6). When it is determined that the temperature in the storage chamber is equal to or higher than the predetermined reference temperature, the control unit 10 controls the heater driving unit 16 to stop the operation of all the heaters (S48).
That is, when the compressor 24 is in operation and the valve is open, but the temperature in the storage chamber rises, the control unit 10 causes the OLP2
It is determined that the driving of the compressor 24 is stopped by the operation of 2, and the heater 18 is stopped to maintain the temperature in the storage chamber.

On the other hand, in the above description, the case where the OLP operates due to an overload is illustrated as an example in which the drive of the compression mechanism is unsteadily stopped, but there is a defect in the compression mechanism itself or an abnormal cause. Therefore, the driving of the compression can be stopped for various reasons such as malfunction.

Further, the present invention is applicable to all kinds of heaters such as a defrosting heater for defrosting an evaporator which is a heater installed in a refrigerator, a heater for heating a door sliding bearing, a defrosting heater and an aging heater. It is most preferably applied to a heater for heating a door sliding bearing and an anti-frost heater which are always driven regardless of the operation mode of the refrigerator.

As described above, according to the present invention, it is determined that the compressor driving unit supplies the drive power to the compressor, and it is determined that the valve is opened and the cool air is supplied to the storage chamber. Nevertheless, when the temperature in the storage chamber sensed by the temperature sensing unit rises above the predetermined reference temperature, it is determined that the compressor is in a stopped state due to overload, and the driving of the heater is stopped.

As a result, when the drive of the compressor is stopped due to some abnormality during the operation of the refrigeration cycle and the drive of the heater is stopped, the temperature rise in the refrigerator is minimized, while the compressor Provided is a refrigerator in which stability is guaranteed when removable.

[0029]

As described above, according to the present invention, when the drive of the compressor is stopped due to an overload during the operation of the refrigeration cycle, the temperature rise in the refrigerator is minimized and the compressor is stable when re-moved. A refrigerator that can guarantee the sex is provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a cooling cycle of a refrigerator.

FIG. 2 is a control block diagram of a refrigerator according to the present invention.

FIG. 3 is an operation flowchart of the refrigerator according to the present invention.

FIG. 4 is a control flowchart of the refrigerator according to the present invention.

[Explanation of symbols]

10 Control unit 12 Temperature sensor 14 valve detector 16 Heater drive 18 heater 20 Compressor drive 24 compressor

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3L045 AA02 BA01 CA02 LA13 MA02                       NA22 PA02 PA03 PA05                 3L046 AA02 BA01 CA06 GB00 JA03                       JA15 KA02 LA11 LA31 MA02                       MA03 MA05

Claims (5)

[Claims] 1. A refrigerator including at least one storage chamber, an evaporator that cools the storage chamber, a compressor, and a compressor drive unit that supplies drive power to the compressor, and a predetermined part of the refrigerator. A heater for heating; a heater driving unit for supplying driving power to the heater; a temperature sensing unit for sensing an indoor temperature of the storage chamber; a compressor driving unit for driving the compressor to pass through the evaporator. When it is determined that the room temperature of the storage chamber sensed through the temperature sensing unit is higher than a predetermined set temperature while supplying cold air to the storage chamber, the heater driving unit A refrigerator for cutting off the supply of driving power to the heater. 2. The heater comprises at least one of a defrost heater for defrosting the evaporator, a frost prevention heater for heating a door sliding bearing, and an aging heater. The refrigerator according to 1. 3. The control unit further includes a valve for adjusting the amount of refrigerant flowing into the evaporator; the control unit is driving the compressor by the compressor driving unit, and the valve is in an open state. In some cases, if it is determined that the room temperature of the storage room sensed by the temperature sensing unit is higher than a predetermined set temperature, driving power from the heater driving unit is provided to the heater. The refrigerator according to claim 1, wherein the refrigerator is shut off. 4. At least one storage chamber, an evaporator for cooling the storage chamber, a valve for adjusting the amount of refrigerant flowing into the evaporator, a compressor, and a drive power source for the compressor. A method of controlling a refrigerator including a compressor driving unit for supplying and a heater for dissipating hot air; determining whether the compressor driving unit is driving the compressor; And detecting whether the room temperature of the storage room detected by the temperature sensing unit is higher than a predetermined set temperature when driving, and the room temperature is higher than the predetermined set temperature. Stopping the operation of the heater when it is sensed that the refrigerator is operating. 5. The method according to claim 4, further comprising the step of determining whether the valve is opened to supply cold air to the storage chamber when the compression mechanism is in operation.
The method for controlling the refrigerator according to [4].