JPS5913876A - Defrosting controller - 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 The present invention d1 relates to a defrosting control device that uses an electronic counter as a timer to issue a defrosting command to a refrigeration device, a heat pump, or the like.

Conventionally, in refrigeration equipment, such as refrigerators, when the operating time of the compressor has been accumulated for a predetermined amount of time (e.g. 8 hours), a defrost command is issued and the frost that forms in the cooler is removed using an electric heater or hot gas. A frosting substance is used. This defrosting method is more efficient with less wasteful defrosting than a method that defrosts periodically over a fixed period of time regardless of the compressor's operating cycle, but it The operating time is set according to the maximum amount of frost formation when frequently taking out and taking out food or when cooling food at excessively high temperatures (high humidity). In situations where the compressor is used infrequently, the amount of frost formed is still small after the cumulative operating time of the compressor has passed for 8 hours, and the outside air temperature and the frequency of food loading and unloading remain at the same level thereafter. In some cases, there may be no problem even if defrosting is performed after the operation time has been further accumulated.

In the present invention, when the electronic counter totalizes the operating time of the compressor, the number of input pulses of the electronic counter is selected according to the temperature or humidity inside the refrigerator, thereby preventing unnecessary defrosting and power consumption. The purpose is to minimize waste and increase in internal temperature.

An embodiment of the present invention will be described in detail below with reference to the drawings. Reference numeral 1 is a pulse source obtained by dividing the commercial voltage and half-wave rectifying the same, and is designed to generate pulses in conjunction with the operation of a compressor (not shown). 2 is an h frequency divider that reduces the frequency of the pulse source to, for example, 1/2, and 3 is a selection means such as a thermostat that switches the contact piece 4 depending on the temperature inside the refrigerator, and when the temperature is below a predetermined temperature, it switches from the high temperature contact H to the low temperature contact. Change. 6 is an electronic counter.

1. The operating situation in the configuration described above will be explained next. Food is frequently taken in and taken out, and there is an excessive heat load inside the refrigerator.
When the temperature inside the refrigerator is less than the set value, use the contact piece analogy f-IA.
The L pulse directly becomes the input to the electronic counter 6, and the dimension /
When the temperature inside the refrigerator is below the set value, the contact piece 4 switches to the low-temperature contact side, and the 30 Hz pulse, which is halved, becomes the input to the electronic counter 6.
When the electronic counter 6 completes a predetermined count, a defrosting signal 7 is generated to issue a defrosting command.

Therefore, defrosting commands can be issued accurately depending on the thermal effect on the inside of the refrigerator due to changes in outside temperature in summer and winter, the frequency of loading and unloading of food, and the freezing and refrigeration status of foods that cause excessive heat load. . Note that instead of the thermostat in the above embodiment, a thermistor,
Temperature sensing may also be used.

As described above, the present invention selectively inputs the first pulse from the pulse source and the second pulse obtained by dividing or multiplying the first pulse into an electronic counter depending on the temperature or humidity inside the refrigerator. In addition, the defrosting command is issued using the output of the counter, and an internal temperature (humidity) compensation function is added to the conventional system that integrates the operating time of the compressor, reducing power consumption through efficient defrosting. be able to.

[Brief explanation of the drawing]

The drawing is a block diagram of a defrosting control device used in a cooling device as an embodiment of the present invention. 10...0 pulse source, 20.9 fist/divider, 3@・■・
・Thermostanoto, 6...l electronic counter.

Claims (1)

[Claims] A pulse source that emits a first pulse; a frequency divider or multiplier that divides or doubles the frequency of the first pulse to generate a second pulse; a selection means for selectively inputting a pulse to an electronic counter, the defrosting control device issuing a defrosting command based on the output of the electronic counter.