JPH10197127A - refrigerator - Google Patents

Abstract

(57) [Summary] [Problem] To increase the set temperature even under conditions where the temperature of the freezer compartment tends to rise, such as when defrosting or in high-temperature outside air, the temperature of food in the freezer compartment rises excessively, or the ice making speed deteriorates. Could not be suppressed. SOLUTION: The door opening / closing, defrosting, ice storage amount, and outside air temperature are set and controlled as thermistor set value changing conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator for changing an ON / OFF set value of a compressor and an open / close set value of a damper to reduce an operation rate of a compressor in order to reduce power consumption.

[0002]

2. Description of the Related Art Conventionally, a set value is changed only depending on whether a door is opened or closed. For example, JP-A-58-21717
No. 4 discloses this. Hereinafter, conventional control specifications will be described. FIG. 7 is a longitudinal sectional view of a conventional refrigerator, and FIG. 8 is a time chart of the refrigerator. The control board 2 installed on the back of the refrigerator main body 1 controls the compressor 5 and the cooler 6 at an arbitrary set value according to the temperature of the freezer 4 detected by the freezer thermistor 3.
ON / OF of FAN7 which circulates cool air cooled by
Refrigeration room 9 which detected F control and was detected by refrigerator room thermistor 8
The open / close control of the refrigerator compartment damper 10 is performed at an arbitrary set value according to the temperature of the refrigerator. Door switches 11 and 12 of freezer compartment 4 and refrigerator compartment 9
Detects the opening and closing of each of the doors 13 and 14, and, after detecting the closing operation, activates the timer 2a installed on the control board 2.
The timer-2a performs time integration until the next door opening operation. After the timer-2a integrates a fixed time, the set value of the freezer compartment thermistor 3 is increased by a certain value, and the operating rate of the compressor 5 is reduced.

[0003]

In the prior art, control is performed as described above.
Even under conditions where the freezing room temperature easily rises, the set temperature is increased, and there has been a problem that it is not possible to suppress an excessive rise in the temperature of food in the freezing room or deterioration of the ice making speed.

An object of the present invention is to solve the above-mentioned problems and to control the opening and closing of the door, defrosting, the amount of ice storage, and the outside air temperature as the thermistor set value changing conditions.

[0005]

According to the refrigerator of the present invention, a freezer compartment temperature detecting means for detecting the temperature of the freezer compartment, a refrigerator compartment temperature detecting means for detecting the temperature of the refrigerator compartment, and the detection by the detecting means. A compressor that turns on and off and a damper that opens and closes in a predetermined temperature range set by temperature;
Door opening / closing detecting means for detecting opening / closing of a door, a defrost sensor for a cooler, a cooler defrost heater which is turned on / off at a predetermined temperature set by a temperature detected by the defrost sensor, and a defrost detector for detecting completion of defrost. When the door is closed and the ice is full at the time of ice detection after defrosting, when the door is closed, control is performed to raise both or one of each set value of the freezing compartment temperature detecting means and the refrigerator compartment temperature detecting means. Is what you do.

Also, an ice maker, a water supply tank, a water supply path connecting the ice maker with the water supply tank, and an anti-icing heater for preventing icing of the water supply path are provided. When the ice is full at the time of ice detection, control is performed to increase both or one of the set values of the freezing room temperature detecting means and the refrigerator room temperature detecting means, and to reduce the duty ratio of the icing prevention heater.

Further, an outside air temperature detecting means for detecting the temperature of the outside air is provided, and the outside air temperature is controlled within a predetermined range.

After the start of the control, when the predetermined time comes before the next defrost, the control is released.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. In the present invention, control is performed by setting door opening / closing, defrosting, ice storage amount, and outside air temperature as thermistor set value changing conditions. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a refrigerator, in which a control board 2 accumulates door opening / closing DATA and performs defrosting once every 24 hours in a time period when the frequency of door opening / closing is estimated to be the minimum in a day. However, when the door is not opened or closed (door is closed), defrosting is performed every 72 hours from the first time after the power is turned on and every 48 hours otherwise. When the defrosting of the cooler is completed, the defrosting sensor disposed in the cooler is operated at a constant temperature (for example, 14 ° C.)
When it becomes the above, it is determined that the defrosting is completed, and the defrosting heater is turned off. A water supply tank 15 is installed in the refrigeration room 9 to store water. A water supply pump 16a for circulating the water and a water supply pipe 17 are embedded in a partition wall 16 of the refrigerator compartment 9 and the freezer compartment 4, and a pipe heater 18 for preventing icing is closely attached to the pipe 17. The water sent by the pump 16a enters the ice making machine 19 installed in the freezing room 4 to make ice.
The ice making operation is performed about once every 100 minutes. Next, the ice making operation will be briefly described with reference to FIG. In STEP 1, an ice tray 19a provided in the upper portion of the freezing compartment 4, an ice making thermistor 19b for detecting the ice temperature in the tray, and an ice detecting lever 19d for detecting the amount of ice stored in the ice storage box 19c are rotated to separate the tray 19a. Ice maker 1 consisting of gear box 19e that performs ice operation
In 9, the above water is supplied and freezes in about 100 minutes. S
In TEP2, the ice making thermistor 19b detects the ice temperature, and the gear box 19e detects ice. If there is more than a certain amount of ice, it is determined that the ice is full and if it is less than a certain amount, it is determined that the ice is empty. When the ice is full, the state returns to STEP 1 and ice detection is performed again after 100 minutes. If it is determined to be "sky ice", STE
At P3, the gear box 19e rotates the ice tray 19a,
The ice is released and the water is supplied in STEP1. Next, an example of the set value change control in FIG. 4 in which the door is not opened or closed (door is closed) will be described with reference to a time chart. When the defrosting is completed (the defrosting heater is OFF) (condition 1), the freezer door switch 1
1. When the refrigerator compartment door switch 12 is in the closed state (condition 2) and when ice is fully detected for the first time after ice defrosting is completed (condition 3), an arbitrary set value F (−15) of the freezer compartment thermistor 3 is obtained. ° C
/ -21 ° C) and the optional set value F 'of the refrigerator compartment thermistor 8
(3.5 ° C./2.5° C.) and / or one set value of each is increased by a fixed value (1-2 deg), and the energization rate of the pipe heater 18 is decreased (usually 100%, 3w is 67%,
2w to 0%, 0w; w is electric power = voltage w × current), the operation rate of the compressor 5 is reduced, and the compressor operation rate is reduced by reducing the damper opening rate. The set value change control release condition is released before the above three conditions are not satisfied, or before the next defrost for a predetermined time (preventing excessive rise in food temperature due to defrost: about 8 hours) after the control is started. If the ice becomes full for the first time within the fixed time (8 hours for the next defrost), the set value is not changed. The release of the duty ratio of the pipe heater 18 is released only when the above three conditions are not satisfied. However, for a certain period of time (about 10 minutes) before the ice making (water supply) operation about every 100 minutes, the power supply rate is returned to normal, and frost and ice particles are removed from the pipe 17. As described above, in the first embodiment, it is possible to reduce the power consumption while preventing the temperature of the food in the freezing room and the refrigerator compartment from excessively rising and deteriorating the ice making speed during defrosting.

Embodiment 2 FIG. 5 is a longitudinal sectional view of the refrigerator, and 20 is an outside air thermistor for detecting outside air. Next, FIG.
It will be explained in. At the time when the defrosting is completed (condition 1), the freezer compartment door switch 11 and the refrigerator compartment door switch 12 are in the closed state (condition 2). The outside air is 30 ° C or less (the temperature at which the freezing room temperature starts to rise due to the freezing room temperature dependence on the outside air: varies depending on the model), and 15 ° C or more (the minus temperature range due to the outside air temperature dependency of the water supply pipe and the tank temperature) In the case of (temperature at which becomes) (condition 4), the same control as in the first embodiment is performed. The set value change control release condition is released when the above four conditions are not satisfied or after the start of the control and a predetermined time before the next defrost. The release of the duty ratio of the pipe heater 18 is released only when the above four conditions are not satisfied. However, for a certain period of time (about 10 minutes) before the ice making (water supply) operation every 100 minutes, the power supply rate is returned to normal, and frost and ice particles are removed from the pipe 17. By controlling as described above, it is possible to reduce the power consumption while preventing the temperature of the food in the freezing room and the refrigerator compartment during defrosting from excessively rising and the deterioration of the ice making speed. It is possible to reduce power consumption while preventing an excessive rise in the temperature of indoor food.

[0011]

As described above, in the refrigerator according to the first aspect of the present invention, it is possible to reduce the power consumption while preventing the temperature of the food in the freezing room and the refrigerator room from excessively rising and deteriorating the ice making speed at the time of defrosting. In the refrigerator according to the second aspect, in addition to the above-described effects, it is possible to reduce the power consumption while preventing the temperature of the food in the freezing room and the refrigerated room at the time of high temperature outside air from being excessively increased.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the freezer according to the first embodiment of the present invention.

FIG. 3 is an operation flowchart of the ice making machine.

FIG. 4 is a control time chart of the refrigerator according to the first embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a refrigerator according to a second embodiment of the present invention.

FIG. 6 is a control time chart of the refrigerator according to the second embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a refrigerator according to the related art.

FIG. 8 is a time chart of a refrigerator according to the related art.

[Explanation of symbols]

1 refrigerator body, 2 control board, 2a timer, 3
Freezer compartment thermistor, 4 freezer compartment, 5 compressor, 6 cooler, 7 FAN, 8 refrigerator compartment thermistor, 9 refrigerator compartment, 1
0 Damper, 11 Freezer compartment door switch, 12 Refrigerator compartment door switch, 13 Freezer compartment door, 14 Refrigerator compartment door, 15 Water supply tank, 15a Water supply pump, 16 Refrigeration / refrigeration compartment partition wall, 17 Water supply pipe, 18 Pipe heater, 19 Ice machine, 19a ice tray, 19b ice thermistor, 19
c Ice storage box, 19d Ice detection lever, 19e Gear BO
X, 20 Outside air thermistor.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshige Konishi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. 1071 Mitsubishi Electric Mechatronics Software Co., Ltd. (72) Inventor Yasuhiko Sugimoto 5-71, Kami-ku, Higashi-Osone-cho, Kita-ku, Nagoya-shi, Aichi 1071- Mitsubishi Electric Mechatronics Software Co.

Claims (4)

[Claims] 1. A freezer compartment temperature detecting means for detecting a temperature of a freezer compartment, a refrigerator temperature detecting means for detecting a temperature of a refrigerator compartment, and an ON-state in a predetermined temperature range set by a temperature detected by the detecting means. A compressor that is turned off, a damper that opens and closes, a door open / close detecting unit that detects opening and closing of a door, a defrost sensor of a cooler, and ON-OF at a predetermined temperature set by a temperature detected by the defrost sensor.
A defrosting heater to perform a defrosting operation, and a defrosting detecting means for detecting the end of the defrosting. When the door is closed and ice is detected at the time of ice detection after the end of the defrosting, the freezing room temperature detecting means and the refrigeration are provided. A refrigerator that performs control to increase both or one of each set value of room temperature detection means. 2. An ice maker, a water supply tank, a water supply path connecting the ice maker with the water supply tank, and an anti-icing heater for preventing icing of the water supply path. When the ice is full at the time of ice detection, it is possible to perform control to raise both or one of the set values of the freezing room temperature detecting means and the refrigerator compartment temperature detecting means, and to reduce the duty ratio of the anti-icing heater. The refrigerator according to claim 1, characterized in that: 3. The refrigerator according to claim 1, further comprising an outside air temperature detecting means for detecting an outside air temperature, wherein the outside air temperature is controlled within a predetermined range. 4. The control according to claim 1, wherein the control is released when a predetermined time has passed before the next defrosting after the start of the control.
The refrigerator according to claim 3.