KR0182649B1 - Door opening control device and method thereof - Google Patents

Abstract

The present invention relates to a refrigerator, and more particularly, to a door opening / closing control device and a method for controlling the driving of a blower fan to detect a change in pressure in the refrigerator to facilitate opening and closing of the door. Doors 8 and 9, which are provided to open and close the freezing compartment 2 and the refrigerating compartment 2 ', which are partitioned, the evaporator 4 which forms cold air as an element of the cooling cycle, the freezing chamber 2 and the refrigerating compartment. In the refrigerator provided with the blowing fan (3) forcibly blown by (2 '), it is provided in each of the freezer compartment (2) and the refrigerating chamber (2'), the pressure in the freezer compartment (2) and the refrigerating chamber (2 '). And a control unit 30 for turning on and off the driving of the blower fan 3 by comparing the high internal pressure detecting unit 32 to be detected and the high internal pressure value detected by the high internal pressure detecting unit 32 to a predetermined reference value. The pressure in the refrigerator is kept constant, making it easy to open and close the refrigerator door. Characterized in that one so that the shop.

Description

Refrigerator door opening and closing control device and method

1 is a cross-sectional view showing the configuration and cold air flow of a typical refrigerator.

2 is a view showing an embodiment of a refrigerator to which the present invention is applied.

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

4 is a flowchart showing a door opening and closing control method according to the present invention.

* Explanation of symbols for main parts of the drawings

3: blower fan 8: freezer door

9: refrigerator door 20: pressure sensor

The present invention relates to a refrigerator, and more particularly, to a refrigerator door opening and closing control device and method for facilitating opening and closing the refrigerator door by maintaining the pressure in the refrigerator at a constant pressure by controlling the driving of the blower fan according to the pressure change in the refrigerator. will be.

Generally, as shown in FIG. 1, the refrigerator is installed at the rear of the main body 1 partitioned into the freezer compartment 2 and the refrigerating compartment 2 ′ by the partition 10 and the freezer compartment 2 to generate cold air. And an air blower (3) provided above the evaporator (4) to inflow high internal air to promote heat exchange of the evaporator (4) and forcibly blowing air cooled to the freezing chamber (2) and the refrigerating chamber (2 '). ).

When the blower fan 3 provided at the rear of the freezing chamber 2 is driven in the refrigerator, air is blown forward from the rear of the blower fan 3, so that the pressure at the rear of the blower fan 3 is lowered. Therefore, the cold air in the freezing chamber 2 and the refrigerating chamber 2 'is introduced into the evaporator 4 to compensate for the pressure drop behind the blower fan 3 by the pressure drop. The cold air thus introduced passes through the evaporator 4 and heat exchanges with the evaporator 4 below the freezing point, thereby further cooling. In addition, the generated cold air is forcedly blown into the freezing chamber 2 and the refrigerating chamber 2 'by the driving of the blower fan 3, so that the cold air is properly distributed to the freezing chamber 2 and the refrigerating chamber 2' to achieve circulation of the cold air. do.

As described above, when the blower fan 3 is driven, the pressure in front of the blower fan 3 increases and the pressure in the rear of the blower fan 3 decreases, so that the air in the chamber circulates to maintain a uniform pressure. The blowing fan 3 causing the air circulation is intermittently controlled in accordance with the opening and closing of the doors 8 and 9. That is, when the doors 8 and 9 are opened, the driving of the blower fan 3 is immediately stopped to prevent cold air from leaking to the outside. When the doors 8 and 9 are closed, the blower fan 3 is immediately opened. By driving, the air in the refrigerating compartment 2 'and the freezing compartment 2 is introduced into the evaporator 4 and cooled, thereby replenishing the cold air leaked while the doors 8 and 9 are open.

However, in the driving of the blower fan 3 controlled according to the opening and closing of the door, the cold air in the refrigerator is immediately driven by the blower fan 3 after the doors 8 and 9 are opened and closed. In the refrigerator, there is no cold air blown into the refrigerating chamber 2 'and the freezing chamber 2 for a short time, and the pressure in the refrigerator is temporarily reduced to become a vacuum state. Therefore, when the doors 8 and 9 are to be opened again, the doors 8 and 9 are not easily opened since the force of the lower pressure in the refrigerator must be further applied from the outside.

Therefore, the present invention has been made to solve such a problem, the purpose of the door opening and closing to facilitate the opening and closing of the door by maintaining a constant pressure in the refrigerator by controlling the driving of the blower fan 3 according to the pressure change in the refrigerator. It is to provide a control apparatus and method.

In order to achieve the above object, the present invention provides a door, each of which is provided to open and close the freezing compartment and the refrigerating compartment divided up and down by a partition wall, an evaporator that forms cold elements and creates a cold air, and a blower fan for forced cooling of the cold air into the freezing compartment and the refrigerating compartment. In the refrigerator having a high pressure detection unit which is installed in each of the freezer compartment and the refrigerating compartment to sense the pressure of the freezer compartment and the refrigerating compartment, the drive of the blower fan to maintain a high internal pressure in accordance with the detection result of the high pressure detection unit The control unit for controlling the on-off.

In addition, the door opening and closing control method of the refrigerator according to the present invention is a door, respectively provided to open and close the freezer compartment and the refrigerating compartment partitioned up and down by the partition wall, an evaporator to form a cold air as an element of the refrigeration cycle, the high internal air into the evaporator to cool A refrigerator having a blower fan forcibly blowing into a freezer compartment and a refrigerating compartment and a high pressure detection unit for detecting a pressure in the refrigerator, wherein the refrigerator detects the pressure in the freezer compartment and the refrigerating compartment, and determines the high pressure value detected in the process. Comparing the reference value, driving the blower fan if the high internal pressure value is higher than or equal to a predetermined reference value; and stopping driving of the blower fan if the high internal pressure value is lower than or equal to the predetermined reference value. Preventing the internal pressure drop to facilitate the opening and closing of the door.

Hereinafter will be described the configuration and effect according to a preferred embodiment of the present invention.

As shown in FIG. 1 and FIG. 2, the refrigerator according to the embodiment to which the present invention is well applied includes a main body 1 partitioned into a freezer compartment 2 and a refrigerating compartment 2 'by a partition 10, The evaporator 4 installed at the rear of the freezer compartment 2 to generate cold air and the air provided at the upper side of the evaporator 4 to flow into the evaporator 4 to cool the air cooled by heat exchange with the freezer compartment 2 and the refrigerating compartment ( And a blowing fan 3 for forcibly blowing at 2 ').

In addition, in order to detect the pressure in the refrigerator according to the present invention, as shown in FIG. 2, the internal pressure that is changed according to the opening and closing of the doors 8 and 9 or the driving of the blower fan 3 is generally used. A plurality of pressure sensors 20 are provided at both sides of the cold air inlet of the freezing compartment 2, the cold air inlet and the cold air outlet of the refrigerating compartment 2 ′, and the refrigerator. However, the pressure in the refrigerator is changed according to the operation of the blower fan 3 or the opening and closing of the refrigerator doors 8 and 9, so that it is possible to install anywhere in the refrigerator where the pressure change occurs. It is not limited to the mounting position of the pressure sensor 20 according to an embodiment of the invention shown in.

The pressure sensor 20 can be generally implemented using a semiconductor strain gauge, which uses a piezo-resistive effect that the carrier mobility of a semiconductor crystal changes greatly when stressed by using a semiconductor as a resistor.

In the configuration as described above, when the blowing fan 3 provided at the rear of the freezing chamber 2 is driven, the air in the freezing chamber 2 and the refrigerating chamber 2 ′ is evaporated through the guide passage formed in the partition 10. Inlet, heat exchanged and cooled. The cold air cooled by the heat exchange with the evaporator 4 is forcedly blown by the blower fan 3 and properly distributed to the freezer compartment 2 and the refrigerating compartment 2 'to cool the food stored in the refrigerator, and then the evaporator 4. Back into the.

The control block diagram of the refrigerator according to the present invention is as shown in FIG. 3, and the door opening and closing for detecting opening and closing of the refrigerating compartment door 9 and the freezing compartment door 8 to control the driving of the blowing fan 3. High pressure sensor 32 having a detector 31, a pressure sensor 20 provided in a plurality of places in the freezer compartment 2 and the refrigerating chamber 2 'and detects a high internal pressure, and a freezer compartment temperature for detecting the freezer temperature A sensing unit 33, a refrigerating chamber temperature detecting unit 34 for detecting a refrigerating chamber temperature, a blowing fan driving unit 35 for driving a blowing fan 3 for forcibly blowing cold air generated by the evaporator 4, and Compressor driving unit 36 for controlling the compressor drive, and the control unit 30 for turning on and off the driving of the blower fan 3 in accordance with the detection result of the door opening and closing detecting unit 31 and the high internal pressure detecting unit 32. Equipped.

In the above configuration, when the door opening and closing control method of the refrigerator according to the present invention will be described, the control unit 30 according to the internal temperature detected by the refrigerating compartment temperature detecting unit 34 and the freezing compartment temperature detecting unit 33 in the high temperature inside. In order to maintain the proper temperature, the compressor is driven to start cooling. The refrigerant in the evaporator 5 exchanges heat with the air in the refrigerator according to the driving of the compressor to cool the air in the refrigerator. The cold air cooled in the evaporator 5 is forcibly blown into the refrigerating compartment 2 'and the freezing compartment 2 by the operation of the blower fan 3 provided on the upper end of the evaporator 5 to supply the cold air evenly to the food stored in the refrigerator. do.

As described above, a pressure difference is generated in front of and behind the blower fan 3 as the blower fan 3 is driven, and the freezing chamber 2 and the refrigerating chamber 2 'are caused by the pressure drop behind the blower fan 3. The cold air is introduced into the evaporator (4), and the introduced cold air is forcedly blown back into the freezing chamber (2) and the refrigerating chamber (2 ') by the blower fan (3) is made of repeated cold air circulation.

4 is a flowchart of the refrigerator door opening and closing control method according to the present invention. In step 40, it is determined whether the door 9 is opened or closed by the detection result of the door opening and closing detecting unit 31. When the refrigerating compartment door 9 is opened as a result of the determination of step 40, the driving of the blower fan 3 is stopped in step 45 to prevent cold air from leaking to the outside.

If the refrigerating compartment door 9 is in a closed state as a result of the determination of step 40, in step 41, an average pressure value is calculated by receiving a current high internal pressure detected by the high internal pressure detecting unit 32, and in step 42. The average high internal pressure calculated in the above is compared with a reference pressure value A which is set in advance as the pressure value in the refrigerator in a state where the door is easily opened and closed.

At this time, the pressure sensor 20 for detecting the high internal pressure can be installed in one or more in place in the refrigerating chamber (2 '), in the case of one, it is preferable to set a different reference pressure value according to each installation position.

If the current pressure value is greater than or equal to the reference pressure value (A) as a result of the comparison in step 42, the blower fan 3 is driven in step 46 to circulate cold air, and if the comparison pressure is less than or equal to the reference pressure value (A), the step ( In 43), the present pressure value is compared with a reference input value B which is set as a high internal pressure value in a state where the pressure in the refrigerator is lowered and the door 9 is difficult to open.

As a result of the comparison of the step 43, if the current high internal pressure value is less than or equal to the reference pressure value B, the operation of the blower fan 3 is stopped in step 44 to increase the pressure in the refrigerator to facilitate opening and closing of the door. As a result, if the current high internal pressure value is greater than or equal to the reference pressure value B, the blower fan 3 is driven to circulate cold air.

As described above, the door opening / closing control device of the refrigerator according to the present invention maintains a constant pressure in the refrigerator to easily open and close the doors 8 and 9, thereby providing convenience in use. There is.

Claims (2)

Doors 8 and 9 respectively provided to open and close the freezer compartment 2 and the refrigerating compartment 2 ', which are partitioned up and down by the partition 10, and an evaporator 4 that forms cold air as an element of the refrigeration cycle, and cold air. A refrigerator having a blower fan (3) for forcibly blowing air into the freezer compartment (2) and the refrigerating compartment (2 '), wherein the freezer compartment (2) and the refrigerating compartment (2') are respectively installed in place. And a high pressure resistance detecting unit 32 for detecting a pressure in the 2 ', and a control unit 30 for controlling the driving of the blower fan 3 on and off in accordance with the detection result of the high pressure detecting unit 32. The door opening and closing control device of the refrigerator, characterized in that the pressure in the refrigerator to maintain a constant to facilitate opening and closing the door. Doors 8 and 9 respectively provided to open and close the freezing compartment 2 and the refrigerating compartment 2 ', which are partitioned up and down by the partition 10, and an evaporator 4 that forms cold air as an element of the freezing cycle. A refrigerator having a high pressure detection unit 32 that detects the pressure in the refrigerator, and a blower fan 3 for forced air blowing to the freezer compartment 2 and the refrigerating compartment 2 'after the high-temperature air is introduced into the evaporator 4 and cooled. In the step (41) of detecting the pressure in the freezer compartment (2) and the refrigerating compartment (2 '), the process of comparing the high internal pressure value detected in the step (41) with a predetermined reference value (42, 43), the comparison As a result, if the high pressure resistance value is equal to or greater than a predetermined reference value, the driving fan 3 is driven (46). It is characterized in that the opening and closing of the doors (8) and (9) are easy to open and close by preventing the pressure drop in the air caused by the blowing fan (3). Django door opening and closing control method.