JPH04363576A - Refrigerator defrost control device - Google Patents

Abstract

PURPOSE:To restrict the increase of an inside temperature and retain the freshness of stored matters by method wherein a season is detected by a season timer and a time band is detected by a time band timer when the accumulating timer of the operating time of a compressor has arrived at a defrosting operation starting time to effect the defrosting operation in accordance with the season and the time band. CONSTITUTION:A control unit 10 is provided with a season timer 2, a time zone detecting timer 3 and an accumulating timer 12, setting a defrosting starting time from the operating time of a compressor 11, and when the accumulating timer 12 has arrived at a defrosting starting time, a data in the season timer 2 is compared with the division of summer, which is stored in a memory 13, and the defrosting operation is started except in summer. In summer, the time of the timer 3 is compared with the available time of defrosting and a defrosting control circuit 14 is driven so as to start normal operation or defrosting operation. Accordingly, defrosting operation at a time when an atmospheric temperature is high, or in a time band such as in the morning or the evening, in which the taking-in and the taking-out of foods are frequent, is not effected whereby the increase of the inside temperature of a refrigerator can be avoided and the freshness of foods can be retained for a long period of time.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defrosting control device for a refrigerator.

0002

[Prior Art] In conventional refrigerators, frost builds up on the cooler inside the refrigerator depending on the amount of food and the frequency of putting food in and out.
In order to cover the surface of the cooler and prevent cooling inside the refrigerator, the compressor should be stopped in frosty conditions or at regular intervals, and the defrost heater should be energized to defrost the air, or the flow of refrigerant should be changed to remove high-temperature gas. The method used is to defrost the water by pouring it into a cooler. Defrosting starts when the compressor starts operating or after defrosting is completed, and when the cumulative operating time of the compressor reaches a preset time, the compressor starts operating regardless of the internal temperature. A commonly used method is to stop the operation and defrost the air. In this case, when the compressor is operating at a high rate, such as in the summer, the integration timer times up earlier and the time at which defrosting begins is delayed, which may cause the time when the door is often opened and closed during the hot daytime or in the morning and evening. This often causes the temperature inside the refrigerator to rise, causing problems in keeping food fresh. In addition, since it is based on the cumulative operating time, opening and closing of the door to take food in and out is not taken into consideration, resulting in an increase in the amount of frosting in the summer when the door is frequently opened and closed, and it is not possible to completely defrost within the specified defrosting time. There were also cases where the frost remained as a core and the frosting increased further, so a complete countermeasure was not possible.

0003

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems.It is an object of the present invention to start defrosting at night when the temperature is relatively low, to suppress the rise in temperature inside the refrigerator, and to reduce the temperature of stored food. The purpose of the present invention is to provide a defrosting control device for a refrigerator that can maintain the freshness of the refrigerator.

0004

[Means for Solving the Problems] In order to achieve the above object, the control unit is provided with an integration timer that integrates the operating time of the compressor, a seasonal timer, and a timer that detects the time zone, and the integration timer is set to a predetermined time. When the defrosting start time is reached, the seasonal timer detects the season and the timer detects the time zone, and if it is outside of summer, defrosting operation will start immediately, and if it is summer and defrosting operation is possible, defrosting will start. When the operation is started and the defrosting operation is not possible, the normal operation is continued, and the defrosting operation is started after the defrosting operation is possible.

[0005]

[Operation] According to the above configuration, the microcomputer for controlling the refrigerator is provided with a seasonal timer and a timer for detecting the time zone, and when the refrigerator is installed, the month, date and time are set, the refrigerator starts operating, and the controller The integrated timer that instructs the start of defrosting integrates the operating time of the compressor, and when the integrated time reaches the preset defrosting start time, the seasonal timer indicates that the season is summer (June to September). If the timer indicates that the defrost operation is possible (from 10 p.m. to 5 a.m.), the defrost operation will start immediately, and if it is not within the defrost operation possible time, the defrost operation will continue as normal and the defrost operation will be possible. The defrosting operation is started when the time zone is reached, and outside the summer, the defrosting operation is started immediately even if the defrosting operation is not possible.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an external perspective view of a refrigerator according to the present invention, in which an operation panel 1 for setting a defrosting operation is attached to the front of the front door, and an operation panel door is provided on the front surface. FIG. 2 is a plan view showing the arrangement of the operation surface of the operation panel 1. A display section 4 for displaying the month and day of the seasonal timer 2 and the time of the timer 3 that detects the time zone is provided at the top, and the month and date is at the center. A button switch 5 for setting the time, an LED 6 for operation display, and a mode changeover switch 7, a set switch 8, and an operation display section 9 for displaying the set state are provided at the bottom. When the mode selector switch 7 is set when the refrigerator is installed, the operation display LED 6 flashes and the month, day, hour, and minute button switches 5 become operable.Set the display to the time at the time of installation and press the set switch 8. As a result, the seasonal timer 2 and the timer 3 start measuring time, and at the same time, the operation display LED 6 goes out and the operation of the button switch 5 is prohibited.

FIG. 3 is a block diagram showing the configuration of the present invention.
The control unit 10 is provided with a seasonal timer 2, a timer 3 that detects the time zone, and an integration timer 12 that sets the defrosting start time from the operating time of the compressor 11. Combined seasonal timer 2 and timer 3
starts counting, the integration timer 12 integrates the operation time of the compressor 11, and when the integration timer 12 reaches the defrosting start time, the summer division (June to September), and if it is other than summer, defrost operation is started immediately, and if it is summer, further compare the timing of timer 3 and the possible defrost operation time (from 10 p.m. to 5 a.m.),
Even in summer, if defrosting operation is possible, it will start defrosting operation.
In summer, when the defrosting operation is not possible, the defrosting control circuit 14 is driven so that the normal operation continues, and when the defrosting operation is possible, the defrosting operation is started.

FIG. 4 is a flowchart showing details of the present invention. At the same time as the refrigerator is installed, the seasonal timer 2 is initialized to match the month and day at the time of installation, and the timer 3 for detecting the time zone is initialized to match the time at the time of installation ( 21), the refrigerator starts normal operation, and at the same time starts the integration timer 12 (22). In this state, when the integration timer 12 reaches the defrosting start time (2
3) Compare the time measured by the season timer 2 with the summer classification stored in the memory 13 to determine whether the season is summer (24)
In the case of summer, it is determined whether the time of timer 3 is within the defrosting operation possible time (25), and if it is within the defrosting operation possible time, the defrosting operation is immediately started (26), and the same applies when it is not summer. The defrosting operation is started immediately (26). If it is summer and the time for defrosting operation is not available (25), normal operation continues (28), and after reaching the time for defrosting operation (28).
) The defrosting operation is controlled to start (26). When defrosting completion is detected by the defrosting completion detection circuit 15, the integration timer 12 is reset and normal operation is resumed (27
).

[0009]

[Effects of the Invention] As described above, in the present invention, in addition to the integration timer that controls the defrosting operation, a seasonal timer and a timer that detects the time zone are provided, and when the integration timer reaches the defrosting start time, the seasonal timer is activated. A timer that detects the time zone detects the season and time zone, and immediately starts defrosting operation when the time is outside of summer or when defrosting operation is possible in summer, and when defrosting operation is possible during summer. If not, the system continues normal operation and performs defrosting operation only after the defrosting operation is possible. This prevents the defrosting operation from occurring during the operation, prevents the temperature inside the refrigerator from rising, and keeps food fresh for a long time.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a refrigerator of the present invention.

FIG. 2 is a plan view showing the arrangement of the operation surface of the operation panel.

FIG. 3 is a block diagram showing the configuration of the present invention.

FIG. 4 is a flowchart showing details of the invention.

[Explanation of symbols]

1 Operation panel 2 Seasonal timer 3. Timer 4 Display section 5 Button switch 6. LED for operation display 7 Mode changeover switch 8 Set switch 9 Operation display section 10 Control section 11 Compressor 12 Integration timer function 13 Memory 14 Defrost control circuit 15 Defrost completion detection circuit

Claims (1)

[Claims] Claim 1: A control unit is provided with an integration timer that integrates the operating time of the compressor, a seasonal timer, and a timer that detects a time zone, and when the integration timer reaches a predetermined defrosting start time, the seasonal timer is activated. The system detects the season and the time zone using a timer, and immediately starts defrosting operation if it is outside of summer, and starts defrosting operation if it is in the summer when defrosting operation is possible.
A defrosting control device for a refrigerator, characterized in that when the defrosting operation is not possible, the normal operation continues, and when the defrosting operation is possible, the defrosting operation is started after the defrosting operation is possible.