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Refrigerator

A technology for cold storage and controlled cooling, which is applied in the field of cold storage, and can solve problems such as frosting of coolers, long start-up time, and reduced heat exchange capacity of coolers, so as to achieve reliable stop and prevent a large amount of frosting

Inactive Publication Date: 2008-03-05
HOSHIZAKI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Especially in commercial refrigerators, depending on the heat capacity of the food, the ambient temperature, and the frequency of door opening and closing, the heat load may become larger than expected. Staying near a constant temperature for a long time, or even if the temperature drops is a small change, so the startup time may be particularly long
[0007] However, it's not good for the compressor to keep running like this
This is because, during continuous operation, the air intruding from the outside of the refrigerator or the water vapor released from the food as the door is opened and closed will cause the cooler to continue to frost, and the result of its gradual development will reduce the heat of the cooler. exchange capacity

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0040] A first embodiment of the present invention will be described with reference to FIGS. 1 to 10 .

[0041] The refrigerator is a 4-door type. As shown in FIGS. 1 and 2, it has a main body 10 consisting of an insulated box with an open front. The front opening is divided by a cross-shaped partition frame 11 to form four entrances and exits 12. Viewed from the front, about 1 / 4 of the interior space corresponding to the entrance 12 on the upper right is divided by an insulating partition wall 13 to form a freezer 16 , and the remaining about 3 / 4 is used as a refrigerator 15 . A heat-insulating door 17 is attached to each entrance 12, and the door 17 can swing open and close.

[0042] On the upper surface of the main body 10, a machine room 20 is formed by erecting a board 19 (see FIG. 4 ) around the periphery. On the upper surface of the main body 10 which is the bottom surface of the machine compartment 20, rectangular openings 21 of the same size are formed corresponding ...

no. 2 approach

[0099] Next, a second embodiment of the present invention will be described with reference to FIG. 11 . The difference from the above-mentioned first embodiment lies in the configuration of software operating as the high temperature compensation control device, and the other configurations are the same as those of the first embodiment. Here, as shown in FIG. 11, when it is judged as “Yes” in step S15, when the cooling capacity of the cooling device 31 is increased, the measured cooling rate is compared with the target cooling rate in the same manner as when the cooling operation is controlled. The rotational speed of the inverter compressor 32 is determined based on the comparison result (step S17). That is, the larger the difference between the two, the faster the rotation speed. Here, the target cooling rate is set to three times (3xc) the target cooling rate during the controlled cooling operation, whereby a large cooling capacity is always exerted and the temperature in t...

no. 3 approach

[0101] 12 is a flow chart showing the operation of the controlled cooling operation and the high temperature compensation control device according to the third embodiment of the present invention. In the first embodiment, the cooling operation of the high temperature compensation control device ends when the internal temperature reaches the upper limit temperature TU (No in step S12), and returns to the controlled cooling operation. However, in the third embodiment In this case, when the temperature in the refrigerator reaches the lower limit temperature TL (NO in step S21), the cooling operation of the high temperature compensation control device is terminated. Others are the same as the above-mentioned first embodiment. In this case, as in the second embodiment, in the cooling operation of the high temperature compensation control device, the target cooling rate may be set higher (for example, three times) than the target cooling rate during the cooling control operation, th...

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Abstract

During a control cooling operation, data on control cooling operation characteristic is read from a memory and the data is compared to lowering degree of the temperature in the refrigerator actually measured by an in-refrigerator temperature sensor (46). A cooling device is operated so that the in-refrigerator temperature is lowered along a temperature curve stored in advance. If the in-refrigerator temperature is higher than a set temperature by, for example, 7K for 15 minutes, the cooling ability by the cooling device is made higher than the cooling ability based on control of a control operation control device. Even if a door (17) is opened and closed frequently to gradually increase the in-refrigerator temperature, it is rapidly detected so as to suppress the in-refrigerator temperature to the vicinity of the set temperature.

Description

technical field [0001] The present invention relates to a refrigerator, and more particularly to a refrigerator in which operation control during controlled cooling operation is improved. Background technique [0002] In recent years, for example, among commercial refrigerators, refrigerators equipped with speed-controllable inverter compressors have spread (for example, refer to Patent Document 1). [0003] There are many advantages of having an inverter compressor, one example of which is the increase in efficiency during controlled cooling operation. When performing a controlled cooling operation to maintain the interior temperature near the set temperature, control is performed to lower the speed (rotational speed) of the inverter compressor in stages near the set temperature. When this control method is used, the continuous start (ON) time of the compressor is absolutely extended, in other words, the number of ON / OFF switching is greatly reduced, and it operates at a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D11/00
CPCF25D2400/14F25D19/02F25D2600/06F25D21/04F25D2317/0655F25D2700/02F25B2600/0252F25D2700/12Y02B30/741F25D2500/04F25D2317/0665F25B2600/021F25D29/00F25D17/06Y02B30/70
Inventor 加贺进一近藤直志铃木义康平野明彦酒井忠志
Owner HOSHIZAKI ELECTRIC CO LTD
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