KR0170887B1 - Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator, and more particularly to a refrigerator that shortens the cooling time by lowering the pressure in the refrigerator.

Thus, the structure of this invention is equipped with the main body heat-insulated, the storage room which can store food at low temperature, and the door couple | bonded with the main body so that the storage room may be opened and closed. In addition, an evaporator for cooling the storage compartment is provided at the rear of the storage compartment, and a flow path and a blower fan are formed to forcibly discharge cold air into the storage compartment after the air in the storage chamber is heat-exchanged with the evaporator. In addition, a damper is provided in the flow path to open and close the air sending part and the sending part so that air in the storage chamber can be blown to the outside. In other words, when the fan is rotated, the air outlet is opened to blow the air in the storage chamber to the outside to make the storage chamber low pressure, and then close the damper to maintain the storage chamber at low pressure for cooling.

Therefore, the refrigerator can first cool the storage compartment more quickly by lowering the pressure in the storage compartment. Second, it is possible to maintain the freshness of the food than before because it can suppress the activity of microorganisms and reduce the harmful gas emissions due to the low pressure environment. Third, there is an effect of long-term storage by inhibiting the growth of raw foods by the reduction of oxygen by low pressure in the storage room. Fourth, economic effects can be obtained by satisfying consumer desires by rapid cooling and lowering power consumption.

Description

Refrigerator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly to a refrigerator, wherein the temperature in the refrigerator is rapidly cooled by lowering the pressure in the refrigerator.

The conventional refrigerator has a door 10 coupled to the main body 10 with a white paper to open and close the storage compartment 20, the storage compartment 20 for storing food at low temperature, and the storage compartment 20 as shown in FIG. 30). An evaporator 40 for cooling the storage compartment 20 and a blowing fan 50 for forcibly discharging cold air into the storage compartment are installed at the rear of the storage compartment 20. In addition, the front plate 60 and the partition wall 70 is spaced apart from the rear, the front plate 60 is provided with a plurality of cold air inlet (unsigned) for the discharge of cold air to the storage chamber 20, the partition wall ( 60 forms a flow path 80 to direct suction cold air to the evaporator 40. The evaporator 40 is installed between the partition wall 70 and the rear wall 81, and the blowing fan 50 is located above the evaporator 40, and the blowing fan is directed toward the storage chamber 20.

The refrigerator thus configured was forced to suck air into the cold air intake by rotating the blower fan, heat exchanged with the evaporator, and then discharged into the air to store food at low temperature. In other words, the inside of the high temperature was kept intact and the inside of the high temperature was cooled. Therefore, there was a limit in shortening the cooling time, and late freezing during freezing provides a time for forming large ice crystals in the food tissue, and as the ice crystals grow, the cell walls of the food become more destroyed and become a problem in long-term storage.

The technical problem of the present invention is to shorten the cooling time by lowering the pressure in the refrigerator. In other words, by using a blower fan installed in the inside of the air blowing air in the air through the air sending unit to the outside to realize the inside of the low pressure.

1 is a longitudinal sectional view showing the inside of a conventional refrigerator.

2 is a longitudinal sectional view showing a refrigerator according to the present invention.

3 is a refrigerator control block diagram of an embodiment according to the present invention.

4 is a flowchart illustrating a refrigerator control according to an embodiment of the present invention.

5 is a refrigerator control block diagram of another embodiment according to the present invention.

6 is a flow chart of a refrigerator control according to another embodiment of the present invention.

* Description of Signs of Major Parts of Drawings *

10 main body 11: compressor

20: storage room (indoor) 21: temperature sensor

22: pressure sensing member 30: door

40: evaporator 50: blowing fan

60: front panel 70: bulkhead

80: Euro 90: air outlet

91: damper

The constitution of the present invention includes a main body insulated, a storage chamber capable of storing food at low temperature, and a door coupled to the main body to open and close the storage chamber. An evaporator for cooling the storage compartment and a blowing fan for forcibly discharging cold air into the storage compartment are installed at the rear of the storage compartment. In addition, the front plate and the partition wall is provided in the rear space, the front plate is provided with a plurality of cold air inlet for discharge of cold air to the storage chamber, the partition wall forms a flow path to guide the suction cold air to the evaporator. The evaporator is installed between the partition wall and the rear wall, and the rear wall is provided with an air sending unit and a damper that opens and closes the sending unit for sending out the air in the furnace to the outside. The blowing fan is directed toward the air blowing section.

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

FIG. 2 is a longitudinal sectional view showing a refrigerator to which the present invention is applied, wherein the main body 10 is heat-insulated, the storage room 20 capable of storing food at low temperature, and the body 10 is opened to open and close the storage room 20. It has a door 30 coupled to the branch. An evaporator 40 for cooling the storage compartment 20 and a blowing fan 50 for forcibly discharging cold air into the storage compartment 20 are installed at the rear of the storage compartment 20. In addition, the front plate 60 and the partition wall 70 is spaced apart from the rear, the front plate 70 is provided with a plurality of cold air discharge ports for the discharge of cold air into the storage chamber 20, the partition wall 70 and the rear wall 81 forms a flow path 80 to direct suction cold air to the evaporator 40. The evaporator 40 is installed in the flow path 80 between the partition wall 70 and the rear wall 81, and the air outlet unit 90 and the air outlet unit for transmitting the air in the inside to the rear wall 81 ( The damper 91 which opened and closed 90 is provided.

Referring to the operation of the refrigerator configured as described above are as follows.

The refrigerant passes through a refrigeration cycle consisting of a compressor, a condenser, a capillary tube, an evaporator, and a refrigerant tube connecting them in series, and exchanges heat with the surrounding air with a phase change. Create cold air. Therefore, the blowing fan 50 blows the generated cold air into the inside of the refrigerator 20 so that the food can be stored at a low temperature. That is, the partition wall 70 and the rear wall 81 form one flow path 80 and cool the air in the air forced into the cold air suction unit by the blower fan 50 by exchanging heat with the evaporator 40 and thereby cooling it. The food was stored at low temperature by forcibly discharging it to the cold air outlet. In addition, when opening the air delivery unit 90 installed on the flow path when the blowing fan 50 rotates, the air in the air is forcibly blown to the outside through the air, thereby forming a low pressure in the air delivery unit 90 By closing the shed will maintain a low pressure. If the inside of the chamber is kept at low pressure, temperature and pressure are proportional to each other, as in Boyle-Charles's law.

3 is a control block diagram of an embodiment of the present invention, in the input terminal of the control unit 1a, an internal temperature setting unit 5a for setting a desired temperature in the refrigerator, and an internal temperature detecting unit 4a for detecting the temperature in the refrigerator. And a low pressure cooling selector 2a for selecting low pressure cooling, a high internal pressure detecting unit 3a for detecting a pressure in the refrigerator during low pressure cooling, and an opening / closing detecting unit 7a for detecting whether a refrigerator door is opened or closed. At the output end of the control unit 1a, a blower fan 50 for blowing air into the outside through the circulation and air delivery unit 90 to realize a low pressure inside the storehouse, and the blower fan 50 stores the low pressure inside the storehouse. In this case, the damper driver 9a for closing the air delivery unit 90 to form a low pressure inside the refrigerator and the display unit 6a for displaying the same during low pressure cooling operation are connected. Low pressure cooling is carried out when the refrigerator door is closed and the air blowing unit 90 is opened and the blowing fan 50 is rotated to realize the inside of the refrigerator at low pressure. In addition, when the pressure detection value of the high internal pressure detection unit is reached, the damper driver 9a closes the damper 91 to maintain the inside at low pressure and cools until the set temperature value of the internal temperature setting unit 5a is reached.

Operation of an embodiment of the present invention configured as described above will be described with reference to FIG. When power is supplied to the refrigerator, the control unit 1a determines whether the low pressure cooling operation is selected in the initial stage of the compressor 11, the blower fan 50, and the damper 91 closed state (step 100). . Here, when the low pressure cooling operation is selected, regardless of the temperature in the high temperature, the opening and closing state of the refrigerator door 30 is sensed to realize the low pressure cooling operation (step 102). If it is determined in step 102 that the door 30 is closed, the damper 91 is opened and the blowing fan 50 is rotated so that the air in the chamber is blown to the outside. Because the interior is made of low pressure (step 103), if it is determined that the refrigerator door 30 is open, the door 30 again detects the opening and closing. In step 103, the pressure in the refrigerator formed at the low pressure is compared with the measured value of the pressure sensing member 22 provided in the refrigerator and the set pressure value of the controller 1a (step 104). Here, when the high internal pressure is lower than the set pressure value, the damper 91 is closed to keep the inside at a low pressure (step 105), and when the high pressure is high, the blower fan 50 is rotated to reduce the internal pressure to create a low pressure. In step 106, the cooling operation is performed, and the controller 1a compares the detected value of the temperature sensor 21 installed in the refrigerator with the set temperature of the refrigerator (step 107). If the temperature in the refrigerator is lower than the set temperature, the compressor 11 and the blower fan 50 are stopped and returned to the initial stage. If the low pressure cooling is not selected in step 101, the detected value of the temperature sensor 21 installed in the refrigerator and detecting the temperature is compared with the refrigerator set temperature (step 109). Here, when the temperature in the refrigerator is higher than the set temperature, the compressor 11 is operated to form a refrigeration cycle (step 110), and the controller 1a detects whether the door 30 is opened or closed (step 111). When the door 30 is detected to be closed in step 111, the blower fan 50 is rotated to discharge the air cooled by the evaporator 40 into the chamber to perform a cooling operation (steps 112 and 113). In the step of comparing the detected value of the temperature sensor 21 installed in the refrigerator during the cooling operation to detect the temperature and the set temperature of the refrigerator (step 114). In this case, when the temperature in the refrigerator is lower than the set temperature, the compressor 11 and the blower fan 50 are stopped and returned to the initial stage.

Fig. 5 is a control block diagram of another embodiment of the present invention in which the high pressure resistance detecting portion 3a of the control block diagram of Fig. 3 is replaced by the low pressure working time portion 3a ', that is, the air delivery unit 90 is opened. By rotating the blower fan 50 to blow the air in the refrigerator to the outside, it is possible to form the inside of the refrigerator at a low pressure, which is carried out for the time entered in the low pressure operating time section 3a 'and by closing the air delivery unit 90. It can be maintained at a low pressure, except that the above is the same as the control block diagram of an embodiment.

Operation of an embodiment of the present invention configured as shown in FIG. 5 will be described with reference to FIG. The controller 1a determines whether the low pressure cooling operation is selected (step 101). Here, when the low pressure cooling operation is selected, the opening and closing state of the refrigerator door 30 is detected (step 102). If it is determined in step 102 that the door 30 is closed, the damper 91 is opened and the blowing fan 50 is rotated so that the air in the chamber is blown to the outside. Because the interior is made of low pressure (step 103), if it is determined that the refrigerator door 30 is open, the door opening and closing again detects. The controller 1a determines whether the input low pressure execution time has passed (step 104 '. If the low pressure execution time has passed, the damper 91 is closed to maintain the inside at low pressure (step 105). Same as the control flowchart of the example.

As described in detail above, the refrigerator according to the present invention can shorten the cooling time by forming the inside of the refrigerator at low pressure, and also has a low pressure, so that the growth of microorganisms can be suppressed to safely store food for a long time.

The refrigerator of the present invention can obtain the following effects by converting the pressure in the refrigerator into a low pressure. First, by lowering the pressure in the chamber by the proportional relationship between temperature and pressure in Boyle Charles' law, the chamber can be cooled more quickly. Second, it is possible to maintain the freshness of the food than before because it can suppress the activity of microorganisms and reduce the harmful gas emissions due to the low pressure environment. Third, there is an effect of long-term storage by inhibiting the growth of raw foods by the reduction of oxygen due to the low pressure in the high. Fourth, economic effects can be obtained by satisfying consumer desires by rapid cooling and lowering power consumption.

Claims (5)

The main body 10, the storage compartment 20 provided in the main body 10, a door 30 coupled to the main body 10 to open and close the storage compartment 20, and the storage compartment 20 in the storage compartment 20. In the refrigerator provided with an evaporator 40 for cooling, the transmission unit 90 through which the main body 10 is connected to the storage compartment 20 and the outside, opening and closing for opening and closing the delivery unit 90 Means, a refrigerator characterized in that it comprises a sending means for sending out the air in the storage room through the sending unit 90 when the low pressure cooling operation is selected. The refrigerator according to claim 1, wherein the opening and closing means is closed when the pressure sensing value of the pressure sensing member (22) installed in the storage chamber (20) is lower than the storage chamber setting pressure value. The refrigerator according to claim 1, wherein the opening and closing means closes when a set time elapses during the low pressure cooling operation. The refrigerator according to claim 1, wherein the dispensing means is a blowing fan (50). The main body 10, the storage compartment 20 provided in the main body 10, the door 30 coupled to the main body 10 to open and close the storage compartment 20, and the storage compartment 20 in the storage compartment 20. A refrigerator having an evaporator 40 for cooling 20 and a blower fan 50 for heat-exchanging air in the storage compartment 20 with the evaporator 40. When the low pressure cooling is selected, the storage compartment ( Confirming that the door 30 of the door 20 is closed, forming a low pressure if the door 30 of the storage room 20 is closed, maintaining the formed low pressure, and a refrigeration cycle while the low pressure is maintained. Low pressure refrigerator operation control method comprising the step of operating.