KR19980023075U - High Temperature Control Unit of Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator internal temperature control apparatus for installing a load sensor on a shelf or a vegetable compartment box of the refrigerator to automatically adjust the temperature of the refrigerator according to the load of the shelf or the vegetable compartment. A refrigerator comprising a door opening and closing detection unit for sensing, a shelf unit on which food can be placed, a temperature sensing unit for sensing a temperature in a refrigerator, and a compressor for generating and outputting a gaseous refrigerant of high temperature and high pressure; A load sensing unit installed at a lower end of the shelf to detect a load received by the shelf and outputting a predetermined load sensing signal according to the degree of the load; a load data memory for storing predetermined load data; And a control unit for comparing the current load data inputted from the load sensing unit with the existing load data of the load data memory, and adjusting the operation and operation off temperature points of the compressor when the two load data differ by more than a reference value. Characterized in that configured.

Description

High Temperature Control Unit of Refrigerator

The present invention relates to a refrigerator, and more particularly, to a load sensor installed in a shelf or a vegetable compartment box in a refrigerator to control the internal temperature control apparatus of the refrigerator to automatically adjust the temperature in the refrigerator according to the load of the shelf or the vegetable compartment.

As is well known, a refrigerator includes a freezer compartment and a refrigerating compartment to freeze and store food at low temperatures. In order to store a large amount of food, a refrigerator is properly arranged so that space can be used efficiently. .

In addition, the refrigerator generates and supplies cold air by operating a device related to a cooling cycle in order to maintain a high temperature inside the freezer compartment and the refrigerating compartment. The device related to this cooling cycle is provided from a controller that is well implemented by a microprocessor. It is operated based on the control signal.

1 is a circulation diagram illustrating a cooling cycle of a general refrigerator.

As shown in FIG. 1, a cooling cycle of a general refrigerator includes a compressor 1, a condenser 2, a capillary tube 3, an evaporator 4, and a refrigerant pipe 5 connecting them in series.

In the drawing, reference numeral 1 denotes a compressor for adiabatic compression of low-temperature, low-pressure gaseous refrigerant flowing through the refrigerant pipe 5 according to a predetermined control signal to make a high-temperature, high-pressure gaseous refrigerant, and 2 denotes a compressor (1). 3) Condenser for cooling high-temperature, high-pressure gaseous refrigerant discharged from the outside air to form a liquid refrigerant of room temperature and high pressure by cooling with external air, and 3 consists of a small tube with high resistance. Capillary tube for making the liquid refrigerant into a low-temperature, low-pressure liquid refrigerant, 4 is an evaporator that cools the interior of the low-temperature, low-pressure liquid refrigerant passing through the capillary tube (3) absorbs high heat in the state as a result of evaporation to be.

In addition, reference numeral 6 denotes a condenser fan for promoting exchange between the heat of the refrigerant passing through the condenser 2 and the heat contained in the outdoor air, and 7 denotes the heat and high internal air of the refrigerant passing through the evaporator 4. It represents a freezer compartment and a refrigerating compartment fan for facilitating exchange between the contained heat and further circulating the cooled air evenly in the air.

In addition, in order to detect the temperature of the freezing compartment and the refrigerating compartment, a predetermined temperature sensing unit is provided at each arbitrary place, and the control unit controls the freezing compartment fan or the refrigerating compartment fan based on the temperature sensing signal inputted from the temperature sensing unit to control the cold air inside the refrigerator. By supplying to maintain the internal temperature at a constant temperature.

However, since the temperature sensing unit is installed at an arbitrary position inclined to the inside of the refrigerator, it is impossible to accurately detect the uniform temperature of the refrigerating compartment or the freezing compartment.

In addition, by automatically adjusting the amount of cold air required according to the amount of food stored in the refrigerator, the temperature in the refrigerator must be kept constant. If there is a large amount of food stored in the refrigerator, the cold air supplied is frequently supplied and stored. When the amount of food to be used is small, the supply cycle of the supplied cold air is also made to be designed to increase the efficiency of the overall refrigerator by reducing the operating time of the device related to the cooling cycle.

Accordingly, the present invention was devised in view of the above-mentioned points, and installed a load sensor on a shelf part or a vegetable compartment box of the refrigerator to adjust the temperature in the refrigerator automatically according to the load of the shelf part or the vegetable compartment. The object is to provide a control device.

1 is a cooling cycle of a typical refrigerator.

Figure 2 is a block diagram of a refrigerator equipped with a high temperature control apparatus according to an embodiment of the present invention.

Figure 3 is a flow chart for explaining the operation of the high temperature control apparatus of the refrigerator according to the present invention.

* Explanation of symbols for main parts of the drawings

10 control unit 11: power unit

12: door open and close detection unit 13: freezer compartment temperature detection unit

14: refrigerating chamber temperature detection unit 15: key input unit

16 compressor driving unit 17 compressor

18: condenser fan drive unit 19: condenser fan

20: freezer compartment fan drive unit 21: freezer compartment fan

22: refrigerator compartment fan drive unit 23: refrigerator compartment fan

24: defrost heater driving unit 25: defrost heater

26: indicator driving unit 27: indicator

28: load detection unit 29: load data memory

30: reference temperature memory

The high temperature control apparatus of the refrigerator according to the present invention for achieving the above object is a door opening and closing detection unit for detecting the opening and closing of the refrigerator door, the shelf to put food, the temperature for detecting the temperature in the refrigerator A refrigerator comprising a sensing unit and a compressor for generating and outputting a gaseous refrigerant of high temperature and high pressure; A load sensing unit installed at a lower end of the shelf to detect a load received by the shelf and outputting a predetermined load sensing signal according to the degree of the load; a load data memory for storing predetermined load data; And a control unit for comparing the current load data inputted from the load sensing unit with the existing load data of the load data memory, and adjusting the operation and operation off temperature points of the compressor when the two load data differ by more than a reference value. Characterized in that configured.

Next, with reference to the accompanying drawings will be described in detail a preferred embodiment of the defrost control device of the refrigerator according to the present invention.

2 is a block diagram of a refrigerator to which a high temperature control apparatus of the refrigerator according to a preferred embodiment of the present invention is added.

As shown in Figure 2, the refrigerator to which the defrosting control apparatus according to the present invention is added, the overall operation is controlled through the control unit 10, which is typically implemented as a microprocessor.

In the drawing, reference numeral 11 denotes a power supply for supplying operating power to each part of the circuit including the control unit 10 after rectifying, smoothing, and stabilizing the commercial AC power to make a DC power of a constant size, and 12 is a micro switch. And it is made of an accessory circuit, the door opening and closing detection unit for detecting the opening and closing of the freezer door and the refrigerating chamber door to provide to the control unit 10.

Here, the controller 10 determines whether the freezer compartment door and the refrigerating compartment door are opened or closed based on the detection signal provided by the door opening / closing detection unit 11 and controls the operation of related components. For example, when one of the freezer door and the refrigerating door is opened, the interior lamp (not shown) is turned on while the operation of the cooling cycle is unconditionally stopped.

In addition, reference numerals 13 and 14 are composed of a thermistor and its associated circuits respectively installed in place of the freezer compartment and the refrigerating compartment, and detect the temperature of the freezer compartment and the refrigerating compartment and provide the control unit 10 with a freezer compartment temperature sensing unit and a refrigerator compartment temperature sensing unit. It is wealth.

Here, the control unit 10 determines the temperature of the freezer compartment and the refrigerating compartment based on the detection signals provided by the freezer compartment temperature detector 13 and the refrigerating compartment temperature detector 14, and compares them with the respective preset reference temperatures. The necessary control will be performed. For example, when the temperature of the freezer compartment exceeds the set upper limit temperature, devices related to cooling cycles such as the compressor 17, the condenser fan 19, the freezer compartment 21, and the refrigerating compartment fan 23 will be described later. When the temperature of the freezer compartment reaches the lower limit temperature, the operation of the apparatus related to the cooling cycle is stopped.

In addition, reference numeral 15 is a key input unit including a set key (not shown) and the like of the reference temperature of the freezer compartment and the refrigerating compartment, 16 is a compressor driver for driving the compressor 17 to be described later, 17 is a low temperature And a compressor for adiabatic compression of a low-pressure gaseous refrigerant and converting it into a high-temperature, high-pressure gaseous refrigerant. 18 is a high-temperature, high-pressure gaseous refrigerant discharged from the compressor 17, and is cooled by external air. Condenser fan driving unit for driving the condenser fan (6) for promoting the exchange between the heat of the refrigerant passing through the condenser (not shown) for the liquid refrigerant of the heat contained in the outdoor air.

In addition, reference numeral 20 is a freezer compartment fan driving unit for driving the freezer compartment fan 21 for circulating the cold air generated by the evaporator 1 into the freezer compartment, and 22 is the inside of the refrigerating compartment. It is a refrigerator compartment fan drive part for driving the refrigerator compartment fan 23 for circulating in the furnace.

Here, the compressor driving unit 16, the condenser fan driving unit 18, the freezer compartment fan and the refrigerating compartment fan driving unit 20, 22 are each preferably implemented as a relay and a switching transistor for turning on / off the relay, the control unit 10 On / off under control of the compressor 17, the condenser fan 19, the freezer compartment fan and the refrigerating compartment fan (21, 23) to supply power or cut off the power supply.

In addition, reference numeral 24 is a defrost heater driving unit for driving the defrost heater 25 is installed around the evaporator to serve to melt the frost adhered to the evaporator, which is typically a predetermined time operation operation time of the cooling cycle When is reached, it is controlled to operate for a predetermined time. The defrost heater driver 24 is preferably implemented as a relay and a switching transistor for turning the relay on / off. The defrost heater driver 24 is turned on / off under the control of the controller 10 to supply power to the defrost heater 25 or to supply the supplied power. Block it.

In addition, reference numeral 26 is an indicator driver for driving the indicator 27 that is typically implemented as a light emitting diode or a digitron to display the current operating state of the refrigerator.

Further, reference numeral 28 is a load which is installed in a shelf or a vegetable compartment designed to divide the space in the store and to store food, and detects the load of the shelf and the vegetable compartment and outputs a predetermined result signal to the controller 10. 29 is a load data memory for storing load data detected by the load sensing unit 28, and 30 is a reference temperature for storing temperature data set through the key input unit 15 by a user. Memory.

Next, the operation of the apparatus having the above-described configuration will be described in detail.

Figure 3 is a flow chart for explaining the operation of the high temperature control apparatus of the refrigerator according to the present invention.

First, when power is supplied to the refrigerator and a normal driving operation is performed (step ST1), when a door open / close detection signal is input from the door open / close detection unit 12 (step ST2), the controller 10 detects a load. The unit 28 is controlled to determine the current load level (step ST3), and then to the load data and the load data memory 29 based on the load data input from the load sensing unit 28. Existing load data stored are compared with each other (ST4 step).

Subsequently, when the current load and the existing load data differ from each other by more than the reference setting data (that is, when the current load of the shelf or the vegetable compartment is significantly different from the existing load), The operating temperature point is adjusted. That is, if the current load is large, the reference operating temperature point (for example, -17.5 ° C) of the compressor 17 is increased to, for example, -15 ° C. If the current load is small, the reference operating off temperature of the compressor 17 is increased. The point (eg -22.5 ° C) is adjusted down to, for example, -20 ° C (ST5 step).

Thereafter, the controller 10 stores the new load data in the load data memory 29.

Subsequently, in the state where the operation or the operation-off temperature point of the compressor 17 is adjusted as described above, the controller 10 searches for the operation frequency of the compressor 17 (step ST6), and the operation of the compressor 17. When the number of times exceeds the predetermined number of times, the operation or operation off temperature point of the compressor 17 is readjusted to the original reference temperature point.

On the other hand, the control unit 10 does not adjust the reference temperature point when the load change after the refrigerator door is opened and closed in step ST4 does not deviate from the reference change degree.

That is, according to the above configuration, by supplying cold air in accordance with the load according to the amount of food stored in the refrigerator it is possible to increase the efficiency of the refrigerator.

In addition, the present invention is not limited to the above embodiments, and various modifications can be made within the range permitted by the technical idea of the present invention.

As described above, according to the present invention, a load sensor is installed on a shelf or a vegetable compartment box in the refrigerator to automatically adjust the temperature in the refrigerator according to the load of the shelf or the vegetable compartment, thereby improving the efficiency of the refrigerator. High temperature control device can be realized.

Claims (4)

The door opening and closing detection unit for detecting the opening and closing of the refrigerator door, the shelf unit for placing food, the temperature detection unit for detecting the temperature in the refrigerator, and a compressor for generating and outputting a high-temperature, high-pressure gaseous refrigerant In the refrigerator; A load sensing unit installed at a lower end of the shelf unit to sense a load received by the shelf unit and output a predetermined load sensing signal according to the degree of the load; A load data memory for storing predetermined load data; And a control unit for comparing the current load data inputted from the load sensing unit with the existing load data of the load data memory, and adjusting the operation and operation off temperature points of the compressor when the two load data differ by more than a reference value. High temperature control device of the refrigerator, characterized in that configured. The apparatus of claim 1, wherein the control unit updates the load data memory with current load data when the operation point of the compressor and the operation off temperature point are adjusted. The apparatus of claim 1 or 2, wherein the control unit performs the operation control only after the door open / close signal is input from the door open / close detection unit. The refrigerator according to claim 1, wherein the control unit readjusts the original operation and operation off temperature points when the operation frequency of the compressor exceeds a predetermined number after the operation and operation off temperature points of the compressor are adjusted. Temperature control.