JP4293814B2 - Cooling storage - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling storage that can be controlled at different preset temperatures.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a refrigerator having a function of controlling the inside of a refrigerator at a set temperature that differs depending on a time zone divided by a timer is known (see, for example, Patent Document 1).
An example of the use of this type of refrigerator is one that temporarily stores milk for school lunches. This refrigerator will be described in detail with reference to FIG. 7. By the operation of the weekly timer, the refrigerator is refrigerated at 3 ° C. from 7 o'clock to 13 o'clock on weekdays (Monday to Friday), and from 13:00 on weekdays to the next morning. Until 7 o'clock and all day on Saturdays and Sundays, cold storage is performed at 15 ° C for the purpose of power saving and prevention of mold.
In the refrigeration operation, the internal fan and the dew condensation prevention heater remain energized regardless of whether the compressor is on or off, but when the cold storage operation starts, the internal fan and the dew condensation prevention heater are turned off when the compressor is turned off. Power saving is realized by intermittent operation.
[0003]
On the other hand, generally the suitable growth temperature of mold is 20-35 degreeC, and the suitable relative humidity is 75% or more. Some of them are known to grow even below that.
Here, when the refrigerator as described above is used, for example, if the outside air temperature is about 15 ° C., which is the same as or lower than the set temperature in the cool operation, the timer enters the cool operation. After that, the next refrigeration operation is reached without the compressor being operated at all. In such a case, when the humidity in the cabinet was measured, it increased to 90%. If the compressor operates even during the cold storage operation, the moisture in the cabinet adheres to the cooler or the like as frost, so the inside of the cabinet has a low humidity of about 35%, but if the compressor remains stopped, the humidity It continues to be high.
As described above, when the high humidity state continues, mold is likely to occur. Conventionally, for example, every four hours after the cold storage operation, the refrigerator operation is forcibly performed for one hour. . This lowered the humidity in the cabinet and created a situation where mold was difficult to propagate.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-149657
[Problems to be solved by the invention]
However, in the conventional system, refrigeration operation for a fixed time (1 o'clock) is unconditionally forced every time a fixed time (4 hours) elapses even though a cold operation is performed at a high set temperature to save power. However, even though the humidity in the cabinet is sufficiently low, there are cases in which refrigerated operation is performed meaninglessly, and further improvements have been eagerly desired in order to save power more thoroughly.
The present invention has been completed based on the above circumstances, and an object of the present invention is to further save power by minimizing the operation time of the refrigeration apparatus.
[0006]
[Means for Solving the Problems]
Invention 請 Motomeko 1 includes a compressor, provided with a refrigeration system having a condenser or the like, in a cooling storage which enables cooling to different set temperatures separately in the refrigerator in a time zone, time zone setting temperature is high side Provided with a control means for forcibly operating the refrigeration apparatus for a predetermined time to lower the internal temperature in order to dehumidify the interior on the condition that the refrigeration apparatus has been continuously stopped for a predetermined time in It has the characteristics.
[0007]
The invention of claim 2 includes a refrigeration apparatus having a compressor, a cooler, etc., capable of cooling the inside of the storage, temperature detection means for detecting the temperature in the storage, and the temperature detected by the temperature detection means. Temperature control means for maintaining the interior at the set temperature by performing a control operation in which the refrigeration apparatus repeats operation and stop based on a result of comparison with a predetermined set temperature, and for each time zone divided by a timer An operation detection means for detecting the operation status of the refrigeration apparatus in a cooling storage room that is provided with a set temperature selection means for selecting a set temperature, and that can be cooled to different set temperatures by dividing the interior into time zones, and a setting In a time zone on the higher temperature side, a time measuring means for measuring the time during which the refrigeration apparatus is continuously stopped based on a signal from the operation detecting means, and a storage time when the time measured by the time measuring means reaches a predetermined value. Dehumidify inside Therefore, the refrigeration apparatus is characterized in that it is provided with a control means for forcibly operating the refrigeration apparatus for a predetermined time to lower the internal temperature .
[0008]
[Action and effect of the invention]
<Invention of Claim 1>
In the time zone where the set temperature is high, the refrigeration unit may not be operated for a long time, and the humidity inside the chamber rises during that time, and mold tends to occur. It is effective to reduce the internal humidity. However, the forced operation of the refrigeration apparatus is performed only after the refrigeration apparatus has been stopped for a predetermined time after entering the time zone where the set temperature is higher. In other words, when the refrigeration apparatus is operated so as to cool to the set temperature by that time, the internal humidity is also lowered accordingly, and therefore it is refrained from operating the refrigeration apparatus.
That is, in addition to the operation of the refrigeration apparatus performed to maintain the interior at the set temperature, the forced operation of the refrigeration apparatus performed for the purpose of dehumidification is performed only when it is necessary. it can be further power saving on which reliably fulfill the function.
[0009]
<Invention of Claim 2>
The interior of the refrigerator is maintained at each set temperature by performing a control operation in which the refrigeration apparatus repeats operation and stop for each time period. Meanwhile, the refrigeration apparatus is forcibly operated for a predetermined time only when the refrigeration apparatus is continuously stopped for a predetermined time in the time zone on the higher set temperature side.
Operation of the refrigeration apparatus is performed for the purpose of dehumidification, since it is performed only if it is necessary, it is possible to further save power on which surely played a dehumidifying function.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In this embodiment, the refrigerator used for temporarily storing the milk provided for school lunch etc. is illustrated.
As shown in FIG. 1, this refrigerator has a refrigerator main body 10 formed of a horizontally long heat insulation box opened on the front surface, and the inside becomes a refrigerator compartment 11 (see FIG. 2) and can accommodate milk in a container. A double-spread type heat insulating door 12 is attached to the front opening.
[0011]
As shown in FIG. 2, the refrigerator is equipped with a refrigeration circuit 15 in which a compressor 16, a condenser 17, a capillary tube 18, and a cooler 19 (evaporator) are circulated and connected by a refrigerant pipe 20.
A machine room 22 is provided on the side of the refrigerator main body 10, and a cooler room 23 communicating with the refrigerating room 11 is formed in an upper part of the machine room 22 so as to protrude from the refrigerator circuit 15. 19 is installed in the cooler chamber 23 together with the internal fan 24, while the compressor 16, the condenser 17, and the capillary tube 18 (refrigeration unit 25) are accommodated in the lower side of the machine chamber 22. When the compressor 16 and the internal fan 24 are operated, the indoor air in the refrigerator compartment 11 is sucked into the cooler compartment 23, and the cold air generated while passing through the cooler 19 enters the refrigerator compartment 11. The inside of the refrigerator compartment 11 is cooled by being circulated and supplied. Further, a dew condensation prevention heater 27 is provided on the back surface of the opening edge of the refrigerator compartment 11.
[0012]
This refrigerator is basically refrigerated at 3 ° C. from 7 o'clock to 13 o'clock on weekdays (Monday to Friday) by the action of the weekly timer 31 as shown in FIGS. 3 to 5. From 13 o'clock on weekdays to 7 o'clock on the next morning, and all day on Saturdays and Sundays, cold storage is performed at 15 ° C for the purpose of saving electricity and preventing mold. These temperatures are selected by the setting switch 33.
In the refrigerator operation, the internal temperature detected by the internal thermistor 32 is compared with the set temperature (3 ° C.), and the compressor 16 is turned on / off depending on whether the internal temperature is higher or lower than the set temperature (3 ° C.). Is controlled and the internal temperature is maintained at approximately 3 ° C. During this time, the internal fan 24 and the dew condensation prevention heater 27 remain energized.
[0013]
On the other hand, in the cool operation, the internal temperature similarly detected by the internal thermistor 32 is compared with the set temperature (15 ° C.), and the compressor is determined depending on whether the internal temperature is higher or lower than the set temperature (15 ° C.). 16 is controlled, and the internal temperature is maintained at about 15 ° C. Power is saved by increasing the set temperature and reducing the operating time of the compressor 16. Further, in the cold insulation operation, when the compressor 16 is turned off, the internal fan 24 and the condensation prevention heater 27 are intermittently operated to further save power.
[0014]
Now, in this embodiment, means for performing the dehumidifying refrigeration operation only when necessary is taken. Therefore, as shown in FIG. 3, an operation detection means 34 for detecting the operation status of the compressor 16 is connected to the input side of the control means 30 for controlling the operation of the compressor 16 and the like, and the control means 30. Stores a timer 35.
[0015]
Next, the operation of this embodiment will be described.
In short, in this embodiment, whether or not the refrigeration operation for dehumidification is performed during the cold insulation operation depends on whether the compressor 16 is turned on or off within 4 hours after entering the cold insulation operation. Deciding.
For example, when the ambient temperature around the refrigerator is as high as 30 ° C., the inside temperature is higher than the set temperature for cold insulation (15 ° C.), and as shown in FIG. Control operation in which 16 is repeatedly turned on and off is performed, and the internal temperature is maintained at 15 ° C. The compressor 16 is intermittently turned on to exhibit a cooling function. During that time, frost adheres to the cooler 19 and the like, so that the humidity is lowered and the so-called dehumidification is performed. Therefore, the refrigeration operation (set temperature 3 ° C.) is performed. I will not.
[0016]
On the other hand, when the outside air temperature is as low as 15 ° C. or lower, the inside temperature is kept correspondingly low. Therefore, even when the cold storage operation (set temperature 15 ° C.) is entered, as shown in FIG. 16 continues off. When it is detected by the functions of the operation detection means 34 and the timer 35 that the compressor 16 has been off for 4 hours, the refrigeration operation (set temperature 3 ° C.) is forcibly performed for 1 hour. That is, the place where the compressor 16 is continuously stopped and the humidity in the cabinet is increasing is dehumidified by forcibly performing the refrigeration operation.
Not only at the time of entering the cold insulation operation, but also during the cold insulation operation, if the compressor 16 remains off for 4 hours, the cold operation may be forcibly performed for 1 hour.
[0017]
Thus, in the present embodiment, the forced refrigeration operation performed for the purpose of dehumidification during the cold insulation operation is performed only when it is necessary because the compressor 16 has not been operated so far. Therefore, further power saving can be achieved while fulfilling the dehumidifying function, that is, the function of reliably preventing the generation of mold.
In addition, a temperature sensor for detecting the outside air temperature is not necessary in spite of controlling whether or not the refrigeration operation for dehumidification is performed in relation to the outside air temperature. it can.
[0018]
In the above embodiment, the case where the set temperature of the refrigeration operation is 3 ° C. and the set temperature of the cool operation is 15 ° C., the set temperature is -6 ° C. to 12 ° C. in the refrigerator operation, It can be selected in the range of −6 ° C. to 25 ° C. in the cold operation. Therefore, depending on the purpose, as shown in FIG. 6, the set temperature (3 ° C.) for the cold storage operation can be used lower than the set temperature (12 ° C.) for the refrigeration operation.
In this case, if the refrigeration operation is forcibly performed for 1 hour every 4 hours after entering the cold storage operation as in the prior art, the inside of the refrigerator is changed every 4 hours as shown by the chain line in the figure. It is maintained at the higher set temperature (12 ° C.), resulting in a problem that it cannot be stored at the original target temperature (3 ° C.).
In this embodiment, if the compressor 16 remains off for a predetermined time (4 hours) during operation on the higher set temperature side, not for the purpose of operation such as refrigeration or cold storage, the lower set temperature side is forcibly set. Therefore, as shown by the solid line in the figure, the refrigeration operation is not forcibly performed even after 4 hours from the start of the cold insulation operation, and at a desired low temperature (3 ° C.). It can be saved continuously.
[0019]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) The temperature at which the compressor is forcibly operated for dehumidification is not necessarily limited to the set temperature during the refrigeration operation, but may be any temperature lower than the set temperature during the cold storage operation.
(2) The time for seeing the continuous stop of the compressor and the time for forced operation are not limited to 4 hours and 1 hour exemplified in the above embodiment, but can be arbitrarily set.
(3) The weekly timer is not limited to being externally attached to the control means, but may be built in.
(4) The present invention is not limited to the purpose of temporarily storing milk, but can be widely applied to cooling storages that can be controlled to different set temperatures in the case of other purposes. can do.
[Brief description of the drawings]
FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention. FIG. 2 is a circuit diagram of the refrigeration circuit. FIG. 3 is a block diagram of an operation control mechanism. Time chart [Fig. 5] Time chart of operation control when the outside air temperature is low [Fig. 6] Time chart of operation control when the purpose of use is different [Fig. 7] Time chart of operation control of conventional example [Explanation of symbols]
DESCRIPTION OF SYMBOLS 15 ... Refrigeration circuit (refrigeration apparatus) 16 ... Compressor (temperature control means) 19 ... Cooler 30 ... Control means 31 ... Weekly timer (timer) 32 ... Inside thermistor (temperature detection means) 33 ... Setting switch (setting temperature selection) Means) 34 ... Operation detection means 35 ... Timer (time measuring means)

Claims (2)

In a cooling storage room equipped with a refrigeration apparatus having a compressor, a cooler, etc., and capable of cooling to a different set temperature by dividing the interior into time zones,
In order to dehumidify the interior of the refrigerator, the refrigerator temperature is forcibly operated for a predetermined time in order to dehumidify the interior of the refrigerator on the condition that the refrigerator has been continuously stopped for a predetermined time in the time zone where the set temperature is higher. A cooling storage comprising a control means for lowering . A refrigeration apparatus having a compressor, a cooler, etc., and capable of cooling the interior,
Temperature detection means for detecting the temperature in the chamber;
Temperature control for maintaining the interior at the set temperature by performing a control operation in which the refrigeration apparatus repeats operation and stop based on the result of comparing the temperature detected by the temperature detection means with a preset set temperature. Means,
A set temperature selection means for selecting a set temperature for each time zone divided by the timer,
In a cooling storage room that can be cooled to different set temperatures by dividing the interior into time zones,
Operation detection means for detecting the operation status of the refrigeration apparatus;
Clocking means for timing the time during which the refrigeration apparatus is continuously stopped based on the signal of the operation detection means in the time zone on the higher set temperature side;
If the counted time of the time counting means reaches a predetermined, characterized in that a control means for reducing the predetermined time forcibly operated to refrigerator temperature the refrigeration system in order to dehumidify the inside of the cold storage Cooling storage.

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