KR0113422Y1 - Cold and hot storage combined refrigerator - Google Patents

Abstract

The present invention relates to a combined cold / cold storage that enables to maintain a high internal temperature of the storage faster and more consistently. In the storage that can be used for both refrigeration operation or warm operation depending on the food to be stored, A cold / cold selection unit 10 having a warm switch SW1 and a cold switch SW2 for selecting a warming operation; A power supply unit 20 for applying driving power when the warm switch SW1 or the refrigeration switch SW2 is switched; A refrigeration / warming temperature comparison unit 60 having comparators for comparing the internal temperature sensed by the thermistors with a reference temperature set by the user, and comparing them individually according to a warming operation or a refrigeration operation; The resistance (R30) (R31) and the transistor (TR10) for turning on / off the heater by the output signal of the comparator when the reference temperature is greater than the detected internal temperature of the cold / warm temperature comparison unit 60 as a result of the comparison. A heater driving unit (90) consisting of a relay (RY2), a diode (D4), and a heater (H); And a fan motor driver for driving the fan motor by the output signal of the comparator to force convection of the air heated by the heater when the set reference temperature is greater than the detected internal temperature of the cold / warm temperature comparison unit 60. It characterized by consisting of (100).

Description

Cold & Warm Storage

1 is a cross-sectional view of the combined cold / hot storage reservoir to which the present invention is applied.

Figure 2 is a control block diagram of a combined cold / warm storage of the present invention.

Figure 3 is a detailed circuit diagram of the cold / warm storage of the present invention.

* Explanation of symbols for main parts of the drawings

10: cold / warm selection unit 20: power supply unit

30: temperature temperature detection unit 40: refrigeration temperature detection unit

50: temperature display unit 60: cold / hot temperature comparison unit

70: refrigeration temperature display unit 80: heater driving unit

90: compressor drive unit 100: fan motor drive unit

The present invention relates to a combined cold / cold storage, and in particular to a cold / cold combined storage that enables to maintain a fast and constant internal temperature of the storage in using the cold / cold storage storage.

In general, a cold / cold storage that refrigerated and insulates food, if you want to store the refrigerated food, the refrigerant cycle is driven to cool the high temperature to a predetermined temperature to store the food refrigerated, and to store and store the food stored in the The food is kept warm by raising the temperature to a heat storage temperature or a heating temperature. However, in the case of the cold / warm storage, the food is simply stored by natural convection by driving a refrigerant cycle and a heater when the food is refrigerated. Not only does it take a considerable time to constantly cool or insulate the temperature of the whole high internal body, but also the temperature deviation of the internal space of the high is large depending on the distance from the cooler or the heater, which makes it possible to cool and keep foods fast and evenly. I had a poor problem.

Accordingly, an object of the present invention is to provide a cold / warm combined storage for cooling and storing food, by operating a fan motor during warming operation and forcibly convection the heat of a heater that is heated. It is to provide a combined storage bin.

In order to realize the above object, the present invention provides a heater for heating a food being stored, a plurality of thermistors for detecting a high internal temperature during a warming operation or a refrigeration operation, a compressor for compressing a refrigerant at a high temperature and high pressure, and a high temperature and high pressure. A condenser that cools and condenses the compressed refrigerant by external air, and a control unit that controls the performance of cold storage / heating operation selected by the user, and can be used for both cold storage and warming operation depending on the food to be stored. A cold / cold selection unit (10) having a warming switch (SW1) and a refrigeration switch (SW2) for the user to select a refrigeration operation or a warming operation; A power supply unit 20 for applying driving power when the warm switch SW1 or the refrigeration switch SW2 is switched; A refrigeration / warming temperature comparison unit 60 having comparators for comparing the internal temperature sensed by the thermistors with a reference temperature set by the user, and comparing them individually according to a warming operation or a refrigeration operation; Resistance (R17) (R18), transistor (TR6), and relay for turning on / off the heater by the output signal of the comparator when the reference temperature is greater than the detected internal temperature of the cold / warm temperature comparison unit 60 as a result of the comparison. A heater driving unit 80 composed of RY1, diode D3, and heater H; And a fan motor driver configured to forcibly convection the air heated by the heater by driving the fan motor by the output signal of the comparator when the reference temperature is greater than the detected internal temperature of the cold / warm temperature comparison unit 60. It characterized by consisting of (100).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a combined cold / hot storage reservoir to which the present invention is applied. Operation will be described according to the reference numerals. 1 is a cold / cold storage bin that can be refrigerated and warmed, and 2 is a control unit. The cold / cold combined storage can be selected as a refrigeration operation or a warming operation, and the selected cold operation / cold operation is driven and displayed. . 3 is a door, which allows the food to be stored to be put into and out of the refrigerator, and the state of the stored food can be viewed. 4 and 5 are lower and upper shelf heaters, and when the warming operation of the control unit 2 is selected, the food being stored is heated. 6 is the warming temperature thermistor to detect the internal temperature at the time of warming. 7 is a compressor, when the refrigeration operation is selected by the control unit 2, the refrigerant is compressed to high temperature and high pressure to refrigerate the food to be stored. 8 is a condenser. The compressor 7 cools and condenses the refrigerant having a high temperature and high pressure by external air. 9 is an evaporator, and the refrigerant condensed in the condenser 8 absorbs heat inside the refrigerant into the refrigerant introduced under reduced pressure, thereby cooling the inside of the refrigerator to refrigerate the stored food. Denoted at 10 is a refrigeration temperature thermistor so as to detect the high internal temperature in the refrigerating operation. 11 is a heat insulation board, It is made to insulate and insulate with the outside with the heat insulating material filled inside.

12 is a convection fan motor, which drives the heater and the compressor during operation.

Figure 2 is a control block diagram of the combined cold / cold storage of the present invention, Figure 3 is a detailed circuit diagram of the cold / cold storage of the present invention. As shown, the present invention is the resistance (R1) (R2), the temperature / refrigeration switch (SW1) for selecting the refrigeration or warming in accordance with the food to be stored in each refrigeration / cold storage storage, depending on the refrigerated / cold food Cold / warm selection unit 10 consisting of (SW2) and; In the cold / cold selection unit 10, in the cold / cold selection, a diode (D1) (D2), a stop switch (SW3), a resistor (R3 to R5), and a transistor (TR1 to TR2) to which a driving power is applied. A power supply unit 20 configured to include; When the refrigerator is selected by the cold / cold selection unit 10, a temperature sensor configured by transistors TR3 to TR5, resistors R6 to R10, light emitting diodes L1, and thermistors TH1 that sense the temperature in the refrigerator. 30; In the cold / cold selection unit 10, when the temperature is selected, the refrigeration temperature sensing unit consisting of a resistor (R19 ~ R23), transistors (TR7 ~ TR9), a light emitting diode (L5), thermistor (TH2) for sensing the temperature in the refrigerator 40; The cold / warm temperature comparison unit comprising a comparator (COMP1) (COMP2) for outputting the compared signal by comparing the cold / warm temperature detected by the cold / warm temperature detecting unit (30) and the reference temperature ( 60); Resistor (R30) (R31), transistor (TR10), relay (RY2), diode (R2) to drive the compressor (C) on and off by the refrigeration temperature signal compared in the cold / cold temperature comparison unit 60, respectively ( D4), the compressor driving unit 90 composed of a compressor (C); Resistance (R17) (R18), transistor (TR6), relay (RY1), diode (D3) for driving the heater (H) on / off in response to the warm temperature signal, respectively compared in the cold / warm temperature comparison unit 60 ), A heater driving unit 80 composed of a heater (H); The temperature of each of the cold and warm temperature selection units 10 includes resistances R11 to R16, light emitting diodes L2 to L4, a drive TA1, and a warm temperature setting switch SS1. A display unit 70; Refrigeration temperature consisting of a resistor (R24 ~ R29), a light emitting diode (L6 ~ L8), a drive (TA2), a refrigeration temperature setting switch (SS2) for respectively displaying the refrigeration temperature state selected by the cold / cold selection unit 10 A display unit 50; To the fan motor driver 100 driven by the resistors R32 and R33, the transistor TR11, the relay RY3, the diode D5, and the fan motor M, which are driven when the heater driver 80 is driven. It is made up.

Referring to the effect of the present invention is configured as described above are as follows.

First, when the storage 1 is pressed while the cold operation switch SW1 of the cold / warm selection unit 10 is pressed, the power supply voltage VCC is the resistance R1, the warm operation switch SW1, and the diode. The transistor TR2 is also driven by being applied to the base terminal of the transistor TR1 of the power supply unit 20 through D2 to turn on the transistor TR1, and thus the cold / warm temperature comparison unit 60 and the compressor driving unit ( 90, power supply is started to the heater driving unit 80, and the power supply voltage VCC turns on the transistor TR7 of the refrigerating temperature detecting unit 40, and thus the refrigerating operation switch SW2 during the previous refrigerating operation. Since the applied power is cut off, the compressor driving unit 90 cannot be driven so that the storage 1 is released from the refrigeration operation and is switched to the warm operation.

At this time, even if the held-down operation switch SW1 is removed, the power supply voltage VCC turns on the transistor TR4 of the temperature sensor 30 so that the transistor TR5 is turned on to display the warm operation. The light emitting diode L1 is turned on to display the warming operation.

In the state of displaying the warm operation as described above, the power supply voltage (VCC) is input to the non-inverting terminal (+) of the comparator (COMP1) of the cold / warm temperature comparison unit 60 through the resistor (R10), At this time, the voltage input to the comparator (COMP1) is the voltage of the temperature set by the high, medium, low set by the temperature setting switch (SS1) for setting the internal temperature, that is, the resistor (R10) and the resistor (R14 ~ R16) Divided voltage (V1) = (R14 ~ R16) / R10 + (R14-R16) × VCC is input. In addition, since the low signal is output from any one of the high, middle, and low drives TA1 set by the warm temperature setting switch SS1 in the warm temperature display unit 70, the light emitting diode ( Among the L2 to L4, the light emitting diodes L2 to L4 set by the warm temperature setting switch SS1 are turned on to display the warm temperature.

On the other hand, the inverting terminal (-) of the comparator (COMP1) of the cold / warm temperature comparison unit 60 to detect the temperature in the refrigerator during the operation as a thermistor (TH1) of the warm temperature temperature thermistor (6) shown in FIG. At this time, the high temperature detection is input to the resistor (R9) and the voltage divider (V2) = RTH1 / R15 + RTH1 × VCC divided by the thermistor (TH1).

Therefore, the comparator COMP1 of the cold / warm temperature comparison unit 60 compares the voltages input to the inverting terminal (-) and the non-inverting terminal (+), and when the voltage input from the non-inverting terminal (+) is large, Since the high signal is output from the output terminal of the comparator COMP1, the transistor TR6 of the heater driver 80 is driven on and the transistor TR11 of the fan motor driver 100 is driven on. By driving RY1 and RY3 respectively, power is applied to the heater H and the fan motor M to drive the heater H and the fan motor M, which is generated by the heater H. The heat is forced convection by the fan motor (M) to heat up the entire internal temperature faster.

In this case, the elevated internal temperature is detected by thermistor TH1, and the temperature of the thermistor TH1 is increased so that the detected temperature is higher than the temperature set by the temperature setting switch SS1. Since the comparator COMP1 of the comparator 60 outputs a low signal, the relays TR6 and TR11 of the heater driver 80 and the fan motor driver 100 are switched from an on state to an off state, thereby relaying the relay. (The driving of RY1 (RY3) is timed and the driving of the heater H and the fan motor M are stopped.

Subsequently, when the internal temperature is lowered and the temperature sensed by the thermistor HT1 becomes lower than the set temperature, the high signal is output from the output terminal of the comparator COMP1 while the transistor TR6 of the heater driver 80 and the fan motor driver are output. Transistor TR11 of (100) is driven to heat the heater (H) and fan motor (M) while driving the relays (RY1) and (RY3) to raise the lower internal temperature to the above set temperature. Keeping the warm temperature to keep the stored food.

On the other hand, if the user wants to use the storage 1 as a refrigerator, when the user presses the cold operation switch (SW2) of the cold / cold selection unit 10, the power supply voltage (VCC) is a resistance (R1), refrigeration operation It is applied to the base terminal of the transistor TR1 of the power supply unit 20 through the switch SW2 and the diode D1 to turn on the transistor TR1. Thus, the transistor TR2 is also driven on, and thus the cold / warm temperature comparison unit ( The power supply is started to 60, the compressor driver 90, and the heater driver 80, and the power supply voltage VCC turns on the transistor TR3 of the temperature sensor 30. Since the power applied from the warm-up operation switch (SW1) is cut off, the heater driving unit (80) cannot be driven so that the storage (1) cancels the warm-up operation and switches to refrigeration operation.

At this time, even if the refrigerating operation switch SW2 is pressed, the power supply voltage VCC turns on the transistor TR8 of the temperature sensor 30 so that the transistor TR9 is also turned on to display the refrigerating operation. The light emitting diode L5 is turned on to display the refrigeration operation.

In the state of displaying the refrigeration operation as described above, the power supply voltage (VCC) is input to the non-inverting terminal (+) of the comparator (COMP2) of the cold / cold temperature comparison unit 60 through the resistor (R23), At this time, the voltage input to the comparator (COMP2) is the voltage of the temperature set by the high, medium, low set by the built-in temperature setting switch (SS2) to set the high temperature by the resistance (R23) and the resistance (R27 ~ R28) The divided voltage (V3) = (R27 ~ R28) / R23 + (R27-R28) × VCC is input. In addition, since the low temperature signal is output from any one of the high, middle, and low drives TA2 set by the refrigerating temperature setting switch SS2 in the refrigerating temperature detecting unit 40, the light emitting diode L6 is provided. Among the L8, the light emitting diodes L6 to L8 set by the refrigerating temperature setting switch SS2 are turned on to display the refrigerating temperature.

On the other hand, the inverting terminal (-) of the comparator (COMP2) of the cold / cold temperature comparison unit 60 to detect the temperature in the refrigerator during operation as the thermistor (TH2) of the refrigeration temperature thermistor 10 shown in FIG. In this case, the high temperature resistance is inputted by the resistor R22 and the divided voltage V4 = RTH2 / R22 + RTH1 × VCC by the thermistor TH2.

Therefore, the comparator COMP2 of the cold / warm temperature comparison unit 60 compares the voltages input to the inverting terminal (-) and the non-inverting terminal (+), and when the voltage input from the non-inverting terminal (+) is large, Since the high signal is output from the output terminal of the comparator COMP2, the transistor TR10 of the compressor driving unit 90 is turned on to drive the relay RY2, whereby power is applied to the compressor C, thereby providing the compressor C. ) Will cool the internal temperature.

In this case, the internal temperature to be cooled is sensed by thermistor TH2, and the temperature of the thermistor TH2 is lowered when the detected temperature is lower than the temperature set by the refrigerating temperature setting switch SSW2. Since the comparator COMP2 of the comparator 60 outputs an on signal, the transistor TR10 of the compressor driver 90 is switched from an on state to an off state to stop the relay RY2 and thus the compressor ( C) stops driving.

Subsequently, when the internal temperature is increased and the temperature sensed by the thermistor TH2 is higher than a predetermined temperature, the transistor TR10 of the compressor driving unit 90 is driven while outputting an on signal from the output terminal of the comparator COMP2. While driving the relay RY2, the compressor C is driven to keep the high temperature inside the refrigerator temperature while lowering the high inside temperature to the set temperature to refrigerate the stored food.

In this case, when the stop switch SW3 of the power supply unit 20 is turned on when the warming operation or the refrigeration operation is to be stopped, the power supply voltage VCC applied during the warming operation or the refrigeration operation is cut off, so that the cold / The power supply to the warm temperature comparison unit 60 and the load stage, that is, the heater driving unit 80, the compressor driving unit 90 is stopped to stop both the warming operation or the refrigeration operation.

As described above, the present invention is a cold / warm combined storage that can refrigerate or insulate food, and equipped with a fan motor driving unit in the storage forcibly convection the heat of the heater during warm-up operation so that the internal temperature is faster and more constant. Since it is possible to keep the heat retention time is not only shortened, it is to provide the effect of reducing the power consumption due to the reduction of the warming time of food.

Claims (1)

(Correction) A heater for heating food in storage, a plurality of thermistors that sense the internal temperature during hot or cold operation, a compressor for compressing the refrigerant at high temperature and high pressure, and a refrigerant compressed at high temperature and high pressure to the outside air. A condenser for cooling and condensing by means of a control unit, and a control unit for controlling a performance operation of a refrigerating operation / heating operation selected by a user, wherein the user can use the refrigerating operation or the refrigerating operation according to the food to be stored. A cold / cold selection unit (10) having a warming switch (SW1) and a chilling switch (SW2) for selecting operation or warming operation; A power supply unit 20 for applying driving power when the warm switch SW1 or the refrigeration switch SW2 is switched; A refrigeration / warming temperature comparison unit 60 having comparators for comparing the internal temperature sensed by the thermistors with a reference temperature set by the user, and comparing them individually according to a warming operation or a refrigeration operation; A heater driver 80 for turning on / off the heater by an output signal of the comparator when the reference temperature is greater than the detected internal temperature of the cold / warm temperature comparison unit 60; And a fan motor driver 100 configured to forcibly convection the air heated by the heater by driving the fan motor when the reference temperature is set higher than the detected internal temperature of the cold / warm temperature comparison unit 60. Cold / warm combined storage.