JP3402102B2 - refrigerator - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a set value is changed only by opening / closing a door. For example, JP-A-58-21717
No. 4 publication. The conventional control specifications will be described below. FIG. 7 is a vertical sectional view of a conventional refrigerator, and FIG. 8 is a time chart of the refrigerator. The control board 2 installed on the rear surface of the refrigerator body 1 has a compressor 5 and a cooler 6 at arbitrary set values according to the temperature of the freezer compartment 4 sensed by the freezer compartment thermistor 3.
ON / OF of FAN7 that circulates cold air cooled at
F control, cold room 9 sensed by cold room thermistor 8
Opening / closing control of the refrigerator compartment damper 10 is performed at an arbitrary set value according to the temperature. Door switches 11 and 12 for the freezer compartment 4 and the refrigerator compartment 9
Detects opening / closing of each of the doors 13 and 14, and operates the timer 2a installed on the control board 2 after detecting the closing operation.
The timer-2a integrates the time until the next door opening operation. After the timer-2a has accumulated a fixed time, the set value of the freezer compartment thermistor 3 is increased by a fixed value to reduce the operating rate of the compressor 5.

[0003]

Since the prior art is controlled as described above, it is possible to prevent the defrosting, the high outside air temperature, etc.
There is a problem that the set temperature is raised even under the condition that the freezer compartment temperature easily rises, and the excessive temperature rise of the food in the freezer compartment or the deterioration of the ice making speed cannot be suppressed.

The present invention solves the above-mentioned problems, and it is an object of the present invention to perform control by setting door opening / closing, defrosting, ice storage amount, and outside air temperature as the thermistor set value changing conditions.

[0005]

According to the refrigerator of the present invention, the freezing room temperature detecting means for detecting the temperature of the freezing room, the refrigerating room temperature detecting means for detecting the temperature of the refrigerating room, and the detection by the detecting means. A compressor that turns on and off in a predetermined temperature range set by the temperature, and a damper that opens and closes;
Door opening / closing detection means for detecting opening / closing of the door, defrosting sensor of the cooler, cooler defrosting heater that is turned on / off at a predetermined temperature set by the temperature detected by the defrosting sensor, and defrosting for detecting the completion of defrosting. And a control means for increasing both or one of the set values of the freezer compartment temperature detection means and the refrigeration compartment temperature detection means when the door is closed and the ice is full after ice removal after defrosting. It is something to do.

Further, an ice making machine, a water supply tank, a water supply path connecting the ice making machine and the water supply tank, and an anti-icing heater for preventing freezing of the water supply path are provided, and after the defrosting is completed when the door is closed. When the ice is full at the time of ice detection, both or one of the set values of the freezing room temperature detecting means and the refrigerating room temperature detecting means is raised and the energization rate of the freeze prevention heater is lowered.

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

After the start of control, the control is released when a predetermined time has passed before the next defrosting.

[0009]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. In the present invention, the door opening / closing, defrosting, ice storage amount, and outside temperature are set and controlled as the thermistor set value changing conditions. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a refrigerator. The control board 2 accumulates door opening / closing DATA and defrosts once every about 24 hours during a time period when the door opening / closing frequency is estimated to be the minimum in the day. However, when the door is not opened / closed (the door is closed), defrosting is performed every 72 hours from the first time after turning on the power, and every 48 hours in other cases. When the defrosting of the cooler is finished, the defrosting sensor arranged in the cooler keeps the temperature constant (for example, 14 ° C).
When it becomes the above, it is determined that the defrosting has ended, and the defrosting heater is turned off. A water supply tank 15 is installed in the refrigerating 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 refrigerating room 9 and the freezing room 4, and a pipe heater 18 for preventing freezing is closely attached to the pipe 17. The water sent by the pump 16a enters the ice making machine 19 installed in the freezer compartment 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 part of the freezer 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 provided to rotate the tray 19a and separate it. Ice machine 1 consisting of a gear box 19e for ice operation
The above water is supplied to the inside of the container 9 and it freezes in about 100 minutes. S
In TEP2, the ice making thermistor 19b detects the ice temperature, the gear box 19e performs ice detection, and if there is a certain amount or more of ice, "full ice" and if it is less than a certain amount, it is determined to be "empty ice". When the ice is full, the state returns to STEP 1, and after 100 minutes, ice is measured again. When it is judged as "sky ice", STE
At P3, the gear box 19e rotates the ice tray 19a,
Ice is removed and water is supplied in STEP1. Next, an example of the state in which the door is not opened / closed (door closed) in FIG. 4 for the set value change control will be described with a time chart. When the defrosting is completed (the defrosting heater is OFF) (condition 1), the freezer compartment door switch 1
1. When the refrigerating compartment door switch 12 is closed (condition 2) and the full ice for ice detection is established for the first time after completion of the defrosting (condition 3), an arbitrary set value F (−15) of the freezing compartment thermistor 3 is obtained. ℃
/ -21 ° C) and optional set value F'of the refrigerator compartment thermistor 8
Both or one of (3.5 ° C / 2.5 ° C) or one of the set values is raised by a constant value (1-2 deg), and the energization rate of the pipe heater 18 is lowered (normally 100%, 3w is 67%,
2w-0%, 0w; w is electric power = voltage w × current), the operating rate of the compressor 5 is reduced, and the operating rate of the compressor is reduced by reducing the damper open rate. The set value change control cancellation condition is canceled after the three conditions are not satisfied or after the start of the control and before the definite period of time (preventing an excessive rise in the food temperature due to defrosting: about 8 hours). If the first full ice is reached within the certain time (next 8 hours of defrosting), the set value is not changed. The release of the duty ratio reduction of the pipe heater 18 is performed 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 at intervals of about 100 minutes, the energization rate is returned to normal, and frost and ice particles on the pipe 17 are removed. Since the control is performed as described above, in the first embodiment, it is possible to reduce the power consumption while preventing the temperature of food in the freezer compartment and the refrigerated compartment from excessively increasing during defrosting and the deterioration of the ice making speed.

Embodiment 2. FIG. 5 is a vertical sectional view of the refrigerator, and 20 is an outside air thermistor for detecting outside air. Next in FIG.
Will be explained. At the time when the defrosting is completed (condition 1), the freezer compartment door switch 11 and the refrigerating compartment door switch 12 are closed (condition 2), and the full ice is established for the first time after the defrosting is completed (condition 3). , Outside air is 30 ° C or less (the temperature at which the freezing room temperature starts to rise due to the outside air temperature dependency of the freezing room: varies depending on the model), 15 ° C or more (the above temperature is a negative region due to the outside air temperature dependency of the water supply pipe and tank temperature) Temperature) (condition 4), the same control as in the first embodiment is performed. As for the set value change control cancellation condition, the above four conditions are not satisfied, or after the control is started, it is canceled a fixed time before the next defrosting. The release of the reduction in the duty ratio of the pipe heater 18 is performed only when the above four conditions are not satisfied. However, during a certain period of time (about 10 minutes) before the ice making (water supply) operation every 100 minutes, the electric conductivity is returned to normal, and frost and ice particles on the pipe 17 are removed. Since the control is performed as described above, it is possible to reduce the power consumption while preventing the temperature of food in the freezing room and the refrigerating room during defrosting from increasing and the speed of ice making to worsen. It is possible to reduce power consumption while preventing the temperature of indoor food from rising excessively.

[0011]

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

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view of the freezer compartment according to the first embodiment of the present invention.

FIG. 3 is an operation flow chart 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 vertical cross-sectional view of the refrigerator according to the 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 vertical sectional view of a refrigerator according to the related art.

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

[Explanation of symbols]

1 refrigerator body, 2 control board, 2a timer, 3
Freezing room thermistor, 4 freezing room, 5 compressor, 6 cooler, 7 FAN, 8 refrigerating room thermistor, 9 refrigerating room, 1
0 damper, 11 freezing room door switch, 12 refrigerating room door switch, 13 freezing room door, 14 refrigerating room door, 15 water tank, 15a water pump, 16 freezing / refrigerating room partition wall, 17 water supply pipe, 18 pipe heater, 19 Ice maker, 19a ice tray, 19b ice thermistor, 19
c Ice storage box, 19d Ice detection lever, 19e Gear BO
X, 20 Outside air thermistor.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshige Konishi Marunouchi 2-3-3, Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Shuji Sawano 1071, Kamie 5-chome, Higashioosone-cho, Kita-ku, Nagoya, Aichi Address: Mitsubishi Electric Mechatronics Software Co., Ltd. (72) Inventor Yasuhiko Sugimoto Address: 1071, Kamie 5-chome, Higashidaisone-cho, Kita-ku, Nagoya-shi, Aichi Prefecture (56) Reference: Mitsubishi Electric Mechatronics Software Co., Ltd. (56) JP, A) JP 7-110182 (JP, A) JP 6-294568 (JP, A) JP 5-223427 (JP, A) JP 5-141838 (JP, A) JP Hei 5-149664 (JP, A) JP-A-50-96961 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 11/02 F25D 21/04 F25D 21/08

Claims (4)

(57) [Claims] 1. A freezer compartment temperature detecting means for detecting the temperature of the freezer compartment, a refrigerating compartment temperature detecting means for detecting the temperature of the refrigerating compartment, and an ON-in a predetermined temperature range set by the temperature detected by the detecting means. A compressor that is turned off, a damper that is opened and closed, a door opening and closing detection means that detects opening and closing of the door, a defrosting sensor of the cooler, and an ON-OF at a predetermined temperature set by the temperature detected by the defrosting sensor.
A cooler defrosting heater for F and defrosting detection means for detecting the end of defrosting are provided, and when the door is closed and ice is full at the time of ice detection after the completion of defrosting, the freezer compartment temperature detection means and the refrigeration A refrigerator characterized by performing control to raise both or one of the set values of the room temperature detecting means. 2. An ice making machine, a water supply tank, a water supply path connecting the ice making machine and the water supply tank, and an anti-icing heater for preventing freezing of the water supply path, and after defrosting when the door is closed. When the ice is full when the ice is detected, it is possible to increase both or one of the set values of the freezing room temperature detecting means and the refrigerating room temperature detecting means and to lower the energization rate of the freeze prevention heater. The refrigerator according to claim 1, wherein the refrigerator is a refrigerator. 3. The refrigerator according to claim 1 or 2, wherein an outside air temperature detecting means for detecting the temperature of outside air is provided, and the outside air temperature is controlled within a predetermined range. 4. The control is released when a predetermined time has passed before the next defrosting after the control was started.
~ The refrigerator according to claim 3.