JPS6210574A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a forced draft type refrigerator-freezer, and particularly to a method for controlling the blower thereof.

BACKGROUND OF THE INVENTION An example of the conventional blower control method described above will be described with reference to the drawings. In FIG. 6, reference numeral 1 denotes a refrigerator body, which is divided by a partition wall 2 into a freezing compartment 3 in the upper part and a refrigerating compartment 4 in the lower part.

A damper thermostat 6 is provided at the entrance of the refrigerator compartment 4 to adjust the amount of cold air inflow. Also, a main cooler 6 of the refrigeration cycle is built in the partition wall 2, and the generated cold air is forced into the refrigerator compartment 4 through the freezing compartment 3 and the damper thermostat 5 by a blower 7. There is. Reference numeral 8 denotes a freezing room temperature control device, which controls ON/OFF of the compressor 9 of the refrigeration cycle.

Next, a conventional electric circuit will be explained with reference to FIG. 4.

Compressor 9 is connected to a power source via relay 10.

The blower element is connected in parallel to a power source via a relay 11. Here, the relays 10.11 are configured to close their contacts when the excitation coil is energized.

Next, the control device that drives these relays will be described. Reference numeral 8 denotes a freezing room temperature control device, and 8 is a thermistor 12 installed in a part of the freezing room 3. It is composed of resistors R1, R2°R3, and a comparator 13. One output of the comparator 13 connects the relay 1o to 0N1 via the driver circuit 14.
Sends a signal to turn 0FF, and the other side outputs the output switching device 150.
It is connected to an input and configured to send a signal to switch the output terminal. The output switching device 16 switches between the output terminals 15a and 15b based on an input signal.The output terminal 15& sends a signal to turn on the relay 11 via the driver circuit 1, and the output terminal 16b is connected to the input of the timer 16. After receiving the signal from the output terminal 16b, the timer 16 is configured to count a certain period of time and then send a signal to turn off the relay 11 via the driver circuit 17. In this way, after the compressor 9 is stopped, the cooler 6
By operating the blower 7 with a delay until the temperature in the freezer rises to a predetermined temperature in the freezer, the cooler 6 can be used efficiently.

Problems to be Solved by the Invention However, with the above configuration, the higher the outside temperature is, the shorter the time it takes for the temperature of the bath heater 6 to rise to the predetermined temperature in the freezer, and the lower the outside temperature is, the longer it takes. Conventionally, the operation delay time of the blower was constant and was set short in accordance with high outside temperatures, which had the disadvantage that it could not be used efficiently when outside temperatures were low.

In view of the above-mentioned problems, the present invention provides efficient cooling according to the outside air temperature.

Means for Solving the Problems In order to solve the above problems, the blower control method of the present invention includes a timer that outputs a blower stop command after a predetermined period of time has passed after the compressor is stopped, and an outside air temperature sensor that detects the outside air temperature. This device includes a temperature detection device and a delay time command device that outputs a blower operation delay time according to the temperature detection device.

Effects The present invention achieves efficient cooling according to the outside air temperature by controlling the blower operation delay time after the compressor operation is stopped to be shorter as the outside air temperature is higher and longer as the outside air temperature is lower.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the accompanying drawings. Incidentally, the same parts as in the prior art are denoted by the same reference numerals, and the description thereof will be omitted.

In FIG. 1, the numbers 1 to 15.17 are the same as in the prior art, so their explanation will be omitted. Reference numeral 18 denotes an outside temperature detection device, which is composed of a thermistor 1e installed outside the refrigerator main body 1, and its output is connected to the input of the delay time command device 2o. Reference numeral 20 denotes a delay time command device, which is connected to the timer 21 and configured to output a blower operation delay time as a signal in accordance with the outside air temperature input from the outside air temperature detection device 18. After receiving the signal from the delay time command device 2o, the timer 21 is configured to count the blower operation delay time according to the outside temperature and send a signal to turn off the relay 11.

The potential at point A, which is determined by RTH and R1 of room temperature control device 8, is higher than the potential at point B, which is determined by resistors R2 and R3, and the output of comparator 13 becomes 52H'', so relay 10 is turned ON L. Compressor 9 is operated.

Also, from the output terminal 15a of the output switching device 16 to the relay 11
A signal is issued to turn on the fan 7, and the blower 7 starts operating.0 If the temperature in the freezer compartment is lower than the cutoff value, the resistance value RTH of the thermistor 12 increases and the potential A becomes lower than the potential B, so the output of the comparator 13 changes. Relay 1 because it becomes L''
0 is OFF j, the compressor 9 stops. Further, the output terminal of the output switching device 15 is switched to 16b, and at the same time the thermistor 19 detects the outside temperature, and the outside temperature detection device 20 inputs the value to the delay time command device 21. The delay time command device 2o inputs the blower operation delay time to the timer 21 accordingly, and if (for example, the outside temperature changes from T1 to T2), a signal to delay by H1 time is issued from the terminal 20a. Similarly, if T2~T3ec), H2 hours, T
3 to T4 (a), a signal to delay H3 time is issued from terminals 20b and 200, respectively. ) When the timer 21 finishes counting the time, the relay 11 turns OFF.
F L, blower 7 stops. Therefore, by setting the blower operation time to be shorter as the outside air temperature is higher and longer as the outside air temperature is lower, efficient cooling can be performed according to the outside air temperature.

Effects of the Invention As is clear from the above explanation, the present invention provides a freezing room temperature control device that detects the temperature of the freezing room and starts and stops the compressor, and a freezing room temperature control device that starts and stops the compressor by detecting the temperature of the freezing room, and that starts the operation of the blower after a predetermined period of time has passed after the compressor is stopped. Equipped with a timer that outputs a stop command, an outside temperature detection device that detects the outside air temperature, and a delay time command device that outputs the blower operation delay time to the timer according to the value, so the efficiency is adjusted according to the outside temperature. It is possible to perform good cooling.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing an embodiment of the present invention, FIG. 2 is a schematic sectional view of the refrigerator shown in FIG. 1, and FIG. 3 is a diagram showing the relationship between the blower operation delay time and the outside temperature. FIG. 4 is a conventional electric circuit diagram, and FIG. 5 is a schematic sectional view of the refrigerator shown in FIG. 4. 6...Main cooler, 7...Blower, 8.
... Freezer room temperature control device, 18 ... Outside air temperature detection device, 20 ... Delay time command device, 2
1... Timer. Name of agent: Patent attorney Toshio Nakao and 1 other person7.
- Calm age 21 - - Timer Figure 2 Figure 3 Outer ring i1 marks - Figure 4 Figure 5 δ l

Claims (1)

[Claims] A blower that circulates the air cooled by the main cooler to the freezer compartment; a freezer temperature control device that detects the temperature of the freezer compartment and starts and stops the compressor; A refrigerator includes a timer that outputs a stop command, an outside air temperature detection device that detects outside air temperature, and a delay time command device that outputs a blower operation delay time according to the value.