KR19990017486A - Dew device of refrigerator - Google Patents

Abstract

The present invention relates to an apparatus for preventing dew condensation of a refrigerator for preventing dew from forming on the exterior of a refrigerator due to a difference between an internal temperature and an external temperature.

The constitution includes a refrigerator in which a heater for removing dew formed on an outer surface of a main body of a refrigerator is built-in, an outside temperature sensor for measuring the outside air temperature of the refrigerator, an outside air humidity sensor for measuring the outside humidity of the refrigerator, and a main body of the refrigerator Dew among pre-programmed data based on outside air temperature and outside air humidity read from the outside temperature sensor and the outside air temperature sensor and the heater temperature sensor for measuring the ambient temperature of the anti-wold heater, Finding the dew point that starts to form the feature compared to the temperature and dew point read from the heater temperature sensor is characterized in that it comprises a microcomputer to energize the dew condensation heater when it is determined that the dew point is larger.

Therefore, according to the present invention, it is possible to selectively control the energization of the heater by judging whether the condition of the outside air is a dew formation condition through the humidity sensor and the temperature sensor, thereby reducing the power consumption due to the energization of the heater. . In addition, by selectively controlling the energization of the heater only when necessary, there is an effect of reducing the temperature rise of the refrigerator to a minimum to improve the freezing efficiency.

Description

Dew device of refrigerator

The present invention relates to an apparatus for preventing dew condensation of a refrigerator, and more particularly, to an apparatus for preventing dew condensation of a refrigerator for preventing dew from forming on the exterior of a refrigerator due to a difference between an internal temperature and an external temperature.

In general, the refrigerator utilizes the principle of latent heat of evaporation (heat of vaporization) in which a liquid refrigerant phase changes into a gaseous state and takes heat from the surroundings, which is performed on an evaporator provided in a storage compartment. That is, the liquid refrigerant phase-changed while passing through the compressor, the condenser and the capillary tube starts to evaporate to a low temperature as it enters the evaporator, thereby absorbing heat in the storage compartment and cooling the storage compartment. In addition, the main body of the refrigerator is insulated to increase the cooling effect. However, the door part of the refrigerator is relatively thinner than the side and the rear of the refrigerator, so the cold air of the refrigerator is transferred to the outer side of the door, thereby causing dew formation due to the difference between the outside temperature. Due to such dew condensation, there were problems such as water droplets flowing down or staining during drying.

Therefore, in a general refrigerator, the heater is supplied to the inner surface of the door to control the energization of the heater to maintain the door temperature at a constant temperature, that is, a temperature that can reduce the difference between the outside air temperature.

1 is a view schematically showing a part in which a heater is mounted in a general refrigerator, and FIG. 2 is a control block diagram for controlling a conventional heater.

First, referring to FIG. 1, the inner side of the door is provided with a plurality of shelves (not shown) for storing beverages and other items, and according to the model, the beverage dispenser 2 and the home bar ( 3) is installed. Due to this installation space, the heat insulating material around the beverage dispenser 2 and the groove bar 3 is made relatively thin. Therefore, cold air in the refrigerator is easily transferred to the outer side of the door, and dew condensation appears around the beverage dispenser 2 and the groove bar 3 on the outer side of the door.

FIG. 2 is a control block diagram of a conventional refrigerator for suppressing such dew condensation, and its configuration includes a microcomputer 10 performing an operation related to overall control of a refrigerator system, and a driving power supply of the microcomputer 10 and each driving unit. The power supply unit 11 for supplying the power supply, the high temperature detection unit 12 for measuring the internal temperature of the high temperature, the function setting unit 13 for setting the operation state of the refrigerator, and the compressor 15 and the anti-dew heater 16 And a load driver 14 for controlling the energization of the power supply simultaneously.

According to the above configuration, when the operation mode is input through the function setting unit 13, the microcomputer 10 enters the operation through the calculation of its own program. In addition, when it is determined that the temperature read through the high temperature detection unit 12 is higher than the set temperature input through the function setting unit 13, the compressor 15 is driven through the load driving unit 14 to perform the refrigeration cycle. Drive. At the same time, energization of the dew condensation heater 16 for suppressing the condensation phenomenon appearing on the outer surface of the door 1 is also performed. Therefore, it is possible to reduce the temperature difference between the outer surface of the door 1 and the outside air temperature to suppress the dew formation phenomenon.

However, the conventional refrigerator had the following problems.

That is, even when the compressor of the refrigerator and the dew preventing heater are interlocked with each other and the condition of the outside air cannot cause the dew condensation phenomenon, the heater is energized continuously. Therefore, there is a problem that the power consumption is increased as well as the cooling function is lowered by increasing the temperature of the refrigerator.

The present invention has been made to solve the above-mentioned problems, the object of the present invention is to determine whether the dew conditions outside conditions through the humidity sensor and the temperature sensor, to prevent the dew condensation of the refrigerator for selectively controlling the energization of the heater To provide a device.

Still another object is to provide a refrigerator preventing dew formation device to reduce power consumption by minimizing the temperature rise of the refrigerator by selectively controlling the energization of the heater.

1 is a front view of a conventional refrigerator,

2 is a control block diagram of a dew preventing device of a conventional refrigerator;

3 is a control block diagram of a dew condensation preventing device of a refrigerator according to the present invention;

4 is a control flow diagram of a refrigerator according to the present invention;

5 is a front view of the refrigerator to which the present invention is applied.

Explanation of symbols for main parts of the drawings

20: microcomputer 21: power supply unit 22: high temperature detection unit

23: function setting unit 24: outside temperature detection unit 25: outside humidity humidity detection unit

26: heater temperature detection unit 27: load driving unit 28: compressor

29: dew condensation heater

The configuration of the present invention for achieving the technical problem, in the refrigerator with a heater for removing the dew formed on the outer surface of the main body of the refrigerator, an outside air temperature sensor for measuring the outside air temperature of the refrigerator, the outside air of the refrigerator Ambient humidity sensor for measuring humidity, Dew condensation heater in the body of the refrigerator, Heater temperature sensor for measuring the ambient temperature of the dew condensation heater of the refrigerator, Read from the outside air temperature sensor and the outside humidity sensor Dew point heater is found when the dew point is found to be larger by comparing dew point with dew point, which is pre-programmed based on air temperature and air humidity. Characterized in that it comprises a microcomputer to energize.

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

3 is a control block diagram of a refrigerator according to the present invention, FIG. 4 is a control flowchart of the present invention, and FIG. 5 is a refrigerator to which the present invention is applied.

As shown in FIGS. 3 and 5, the configuration includes a microcomputer 20 performing an operation related to overall control of the refrigerator system, and a power supply unit 21 for supplying driving power to the microcomputer 20 and each driving unit. , High temperature detection unit 22 for measuring the temperature inside the high temperature, function setting unit 23 for setting the operating state of the refrigerator, air temperature sensing unit 24 for measuring the ambient air condition of the refrigerator and the outside air humidity sense The branch 25, the heater temperature sensing unit 26 for measuring the temperature around the dew preventing heater 29, and the load driving unit for selectively controlling the energization of the compressor 28 and the anti dewing heater 29. (27) and the like.

The outside air temperature detection unit 24 of the above-described components is for measuring the air temperature around the refrigerator, and is located at an outer place of the display panel unit 30 or the door 1 or sidewall surface of the refrigerator.

In addition, the outside air humidity detection unit 25 is for measuring the amount of water vapor contained in the air around the refrigerator, which is also located at the outside of the display panel unit 30 or the door 1 or sidewall surface of the refrigerator.

And the heater temperature detection unit 26 is for detecting the ambient temperature of the dew condensation heater (29), it is provided inside the door (1) which is the outside of the door (1) by the heat of the dew condensation prevention heater (29) To measure the temperature delivered to the

In addition, the load driver 27 is configured to drive the compressor 28 and the anti-wold heater 29, respectively, according to the command of the microcomputer 20, or a circuit configured to drive the same together.

Hereinafter, the control flow of the present invention will be described with reference to the above-described components and FIG. 4.

First, when the consumer inputs the operation mode and the desired high internal temperature through the function setting unit 23 while the refrigerator is supplied with power, the microcomputer 20 calculates the high internal and external conditions and the load of each load through the calculation of the program. Determine the condition. That is, the internal temperature is sensed by the internal temperature sensor 22, the outdoor air conditioner 24 and the external humidity sensor 25 detect the external air condition, and check each load stage for abnormal conditions. Will be driven.

When the refrigeration cycle is operated, the microcomputer 20 reads the outside air temperature and the outside air humidity every predetermined time through the outside air temperature detecting unit 24 and the outside air humidity detecting unit 25 (S1).

And the microcomputer 20 finds the dew point which dew forms from the humid air diagram which the table reads outside air temperature and humidity in advance in the program (S2). That is, it finds out from the input table how much dew point is formed under the conditions of temperature and humidity.

And the microcomputer 20 reads the ambient temperature T of the dew condensation prevention heater 29 through the heater temperature detection part 26 (S3).

The microcomputer 20 compares the temperature T read through the heater temperature sensing unit 26 with the dew point temperature found in step S2 (S4).

When it is determined that the temperature T read in the determination step S3 is smaller than the dew point temperature, the microcomputer 20 maintains the energization of the dew condensation preventing heater 29 through the load driving unit 27 (S5). If it is determined that the temperature T read in the determination step S3 is greater than the dew point temperature, the microcomputer 20 energizes the dew preventing prevention heater 28 through the load driving unit 27 (S6). When the temperature of the outside surface of the refrigerator is below the dew point temperature, moisture in the air contacts the outside surface of the refrigerator door 1 to condense and form dew. To prevent such dew formation, dew point temperature of the outside of the refrigerator door is prevented. Keep above temperature.

Therefore, when the dew condensation heater 29 is energized, the temperature around the dew condensation heater, that is, the temperature of the outer surface of the refrigerator door 1, is raised, and then the control flow is returned to perform the condensation by performing step S4 again. The energization of the prevention heater 29 is controlled on / off.

As described in detail above, according to the present invention, it is possible to selectively control the energization of the heater by judging whether the condition of the outside air is dewy condition through the humidity sensor and the temperature sensor, thereby reducing the power consumption of the heater. It can be effective.

In addition, by selectively controlling the energization of the heater only when necessary, there is an effect of reducing the temperature rise of the refrigerator to a minimum to improve the freezing efficiency.

Claims (2)

A refrigerator having a heater for removing dew formed on an outer surface of a main body of a refrigerator, the refrigerator comprising: an outside air temperature sensor for measuring the outside air temperature of the refrigerator, an outside air humidity sensor for measuring the outside humidity of the refrigerator, and a main body of the refrigerator Pre-programmed data on the basis of the outside air humidity and the outside air humidity readings from the outside air temperature sensor and the outside air humidity sensor, the heater temperature sensor for measuring the ambient temperature of the anti dew dew heater in the refrigerator If the dew point is found to be dew condensation is found to be larger than the dew point is compared to the temperature read from the heater temperature sensor and the dew point preventing heater comprises a microcomputer for energizing the dew condenser heater Dew prevention device. The apparatus of claim 1, wherein the heater temperature sensor is positioned between the trauma of the refrigerator main body and the heat insulator, and measures a temperature transmitted from the dew preventing heater to the trauma.