JPH04136671A - Controller for refrigerator - Google Patents

Abstract

PURPOSE:To miniaturize transformers provided for a cooling fan and a heater by a method wherein the intermittent operation of the cooling fan is permitted during the operation of a compressor and the operating period of time of the cooling fan is elongated when an atmospheric temperature is high while the intermittent operation of the heater is permitted during stopping of the compressor and the operating period of time of the heater is elongated when the atmospheric temperature is low. CONSTITUTION:A cooling fan 3 is operated only during the operation of a compressor 1 while a heater 4 is operated only during the stopping of the compressor 1. The cooling fan 3 and the heater 4 are never operated simultaneously and, therefore, an electric power, supplied for the cooling fan 3 and the heater 4, will never become big whereby the enlargement of a transformer 5 is not necessitated. On the other hand, a plurality of heaters and a plurality of switches are not necessitated. The operating period of time of intermittent operation of the cooling fan 3 is elongated stepwisely when the atmospheric temperature, detected by an atmospheric temperature detecting sensor 2, is higher whereby cooling in accordance with the atmospheric temperature can be effected. The operating time of the intermittent operation of the heater 4 is elongated stepwisely when the atmospheric temperature detected by the atmospheric temperature detecting sensor 2 is lower and, therefore, the operation in accordance with the atmospheric temperature can be effected.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a control device for a refrigerator, and particularly to a heater for compensating for outside temperature and a cooling fan installed in a machine room, etc. It is related to the control of

(Prior Art and Problems to be Solved by the Invention) A cooling fan is provided in the machine room of a refrigerator to prevent the compressor from overheating. This cooling fan maintains the cooling performance of the compressor even when the outside temperature is high.

Further, as a heater for compensating for outside temperature, a heater for compensating for inside temperature is provided at the rear of the inner box of the refrigerator compartment.

A transformer is provided between the cooling fan and heater and the power source. This transformer had a problem in that it was quite large because the cooling fan and heater consumed a large amount of power.

Furthermore, this cooling fan control method is configured to operate when the outside temperature is higher than a certain level. but,
Since this judgment of 0N10FF of the cooling fan is based on one outside temperature level, there is a large variation in cooling performance.For example, even if a small amount of cooling is required, the cooling fan is
Because of this, power consumption may be wasted.

Similarly, the heater is activated when the outside temperature is lower than a certain level.

However, since this judgment is also made based on a single outside temperature level, the temperature inside the refrigerator tends to be uneven, and power consumption is often wasted.

Furthermore, in order to control the outside temperature in multiple stages, a plurality of heaters and a plurality of switches are required, which increases the cost.

Therefore, the present invention provides a control device for a refrigerator that allows the cooling fan or heater to operate at a temperature corresponding to the outside air temperature without increasing the size of the transformer connected to the cooling fan or heater.

[Structure of the Invention] (Means for Solving the Problems) The refrigerator control device of the present invention includes a compressor (1) provided in the machine room of the refrigerator, and an outside temperature detection sensor (2) that detects the temperature outside the refrigerator. ), a cooling fan (3) installed in the machine room, a heater (4) for compensating for outside temperature, and a transformer ( 5) When the compressor (1) is operating, the cooling fan (3) can be operated intermittently over a fixed period of time, and the higher the outside temperature detected by the outside temperature detection sensor (2), the longer the cooling fan (3) will operate. is gradually lengthened, and when the compressor (1) is stopped, the heater (4) can be operated intermittently over a certain period of time, and the outside temperature detection sensor (
The control device (6) controls the operation time of the heater (4) to be extended in stages as the outside temperature detected by 2) is lower.
).

(Function) In the refrigerator control device having the above configuration, the cooling fan 3 is operated only when the compressor 1 is activated, and the heater 4 is operated only when the compressor 1 is stopped. Therefore, since the cooling fan 3 and the heater 4 are not operated at the same time, the power supplied to the cooling fan 3 and the heater 4 does not increase, and the transformer 5 that supplies power to the heater 4 and the cooling fan 3 is There's no need to make it bigger. Furthermore, despite multi-stage outside temperature control, multiple heaters and multiple switches are not required.

The intermittent movement of the cooling fan 3 gradually lengthens the operation time as the outside temperature detected by the outside temperature detection sensor 2 increases, so that cooling can be performed in accordance with the outside temperature.

The intermittent operation of the heater 4 also increases the operation time step by step as the outside temperature detected by the outside temperature sensor 2 becomes lower, so that the operation can be performed in accordance with the outside temperature.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a block diagram of the refrigerator control device 10 of this embodiment.

Reference numeral 12 is a compressor provided in the machine room of the refrigerator.

Reference numeral 14 denotes an outside temperature detection sensor for detecting outside temperature T outside the refrigerator.

Reference numeral 1G is a cooling fan for cooling the temperature of a compressor, etc. inside the machine room.

Reference numeral 18 denotes a heater for compensating the temperature inside the refrigerator provided at the rear of the inner box of the refrigerator compartment.

Reference numeral 20 is an AC power supply that supplies power to the cooling fan 16 and the heater 18 .

Reference numeral 22 denotes a transformer, which has an AC power source 20 connected to its negative side, and a cooling fan 16 and a heater 18 connected in parallel to its secondary side.

Reference numeral 24 is a switch made of a photocoupler, and is for switching the cooling fan 16 and the heater 18 to 0N10FF, respectively.

Reference numeral 26 is a microcomputer that adjusts the temperature to 0N of the compressor 12 according to the temperature detected by the outside temperature detection sensor 14.
Switch 28.3 of switch 24 according to the 10FF state.
Open and close 0.

The operating state of the refrigerator control device IO having the above configuration will be explained (see FIG. 3).

The microcomputer 26 enables the cooling fan 16 to operate when the compressor 12 is in the ON state, and enables the heater 18 to operate when the compressor 12 is in the OFF state. Thereby, the cooling fan I6 and the heater 8 are not operated at the same time.

The above compressor 12, cooling fan 16 and heater】8
The operating conditions of the will be explained based on the table in FIG.

The conditions under which the heater 18 is operated are that the compressor 12 is
In the FF state, if the outside temperature T detected by the outside temperature detection sensor 14 is 165° C., the heater 18 is continuously operated. When the temperature is between 5°C and 1515°C, run for 9 minutes, stop for 3 minutes, and then run for 9 minutes, as follows:
This situation continues to be reversed. When the outside temperature T is between 15° C. and 1520° C., the operating and stopping states are alternately repeated every 3 minutes. When the temperature is 20° C. to 1625° C., the heater 18 is operated for 3 minutes, stopped for 9 minutes, operated for another 3 minutes, and then stopped for 9 minutes. When the outside temperature T is T>25°C, heater 1
8 will not be operated.

The conditions under which the cooling fan 16 is operated are as follows:
In the ON state, if the outside temperature T is 25° C.≦T, the device is operated continuously. When the outside temperature T is 15''C<T<25°C, operation and stopping are performed alternately every 3 minutes. Furthermore, when the outside temperature T is 1515°C, no operation is performed.

As described above, with this control device 10, the temperature inside the refrigerator can be appropriately changed in accordance with the outside temperature T, and the heater 18 and the cooling fan 16 are not operated at the same time. Therefore, as shown in FIG. 2, since the voltage can be transformed with one transformer 22,
The capacity of 2 can be reduced. Furthermore, this control device! 10, even when the heater 18 and the cooling fan 16 are in operation, they operate in an intermittent motion, so it is possible to achieve low noise and low power consumption. Furthermore, multiple heaters and multiple switches are not required even though the outside temperature is controlled in multiple stages.

In the above embodiment, the cooling fan 16 provided inside the machine room has been described, but instead of this, the cooling fan inside the refrigerator can also be controlled in the same way. Furthermore, the heater 18 can be similarly controlled not only for the heater for compensating the temperature inside the refrigerator but also for the heater for preventing dew condensation and the heater for preventing damper freezing.

[Effects of the Invention] With the refrigerator control device having the above configuration, the cooling fan and the heater do not operate at the same time, so the transformers provided in the cooling fan and the heater can be made smaller.

The cooling fan and heater can be controlled in multiple stages according to the outside temperature detected by the outside temperature detection sensor, and since the cooling fan and heater operate intermittently, it is possible to reduce power consumption and noise. .

Furthermore, despite the multi-stage outdoor temperature control,
Multiple heaters and multiple switches are not required.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a refrigerator control device according to the present invention. FIG. 2 is a block diagram of a refrigerator control device showing an embodiment of the present invention. FIG. 3 is a block diagram of a refrigerator control device according to an embodiment of the present invention. It is a table showing the operating status of the cooling fan. [Explanation of symbols] 1...Compressor 2...Outside temperature detection sensor 3...Cooling fan 4...Heater 5...Transformer 6... ...Controller and 1 other person-

Claims (1)

[Scope of Claims] 1. A compressor provided in the machine room of the refrigerator, an outside temperature detection sensor that detects the temperature outside the refrigerator, a cooling fan provided in the machine room, and a heater for compensating the outside temperature. A transformer transforms and supplies power from the power supply to the cooling fan and heater, and when the compressor is operating, the cooling fan can be operated intermittently over a fixed period of time, and the higher the outside temperature detected by the outside temperature sensor, the faster the cooling fan The operation time is increased in stages, and when the compressor is stopped, the heater can be operated intermittently over a fixed period of time, and the lower the outside temperature detected by the outside temperature detection sensor, the longer the heater operation time is controlled in stages. A control device for a refrigerator comprising: a control device for controlling a refrigerator;