JPS6033231B2 - refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigerator having a structure in which a cool storage body is attached to a cooler.The purpose of the present invention is to prevent the cold storage body from running even when the compressor is stopped in order to prevent the generation of noise at night. To provide a refrigerator capable of maintaining the inside of the refrigerator at a predetermined low temperature for a long time by cooling action.

The present invention will be specifically explained below using examples.

First, in FIG. 1 of FIGS. 1 to 4 showing one embodiment, 1 is a refrigerator body with a storage chamber 2 formed inside, 3 is a door for opening and closing the storage chamber 2, 4 is a compressor, and 5 is a condenser. It is. Reference numeral 6 denotes a cooler disposed above the inside of the storage chamber 2, which is made of, for example, an aluminum plate bent into an approximately inverted L shape with a lined soot pipe laid in a meandering manner; One cooling surface partitioned by is the main cooling section 7,
The other cooling surface is used as an auxiliary cooling section 8.

The main cooling section 7 is inclined downward in a predetermined direction, for example, toward the rear, and the auxiliary cooling section 8 extends vertically downward from the descending end (rear end) of the main cooling section 7. It has become. Reference numeral 9 denotes a cold storage body, which is made by filling a flat container made of aluminum with a cold storage material such as an aqueous ethanol solution. It is attached via a plastic heat insulating plate 10 corresponding to the above.

A water receiving gutter 11 is arranged and fixed at the back of the storage chamber 2, and both the lower end of the auxiliary cooling part 8 of the cooler 6 and the rear end of the cool storage body 9 face this water receiving gutter 11.

Reference numeral 12 denotes a drainage pipe that guides defrosting water etc. received by the water receiving gutter 11 to an evaporating dish (not shown).

Now, as shown in FIG. 2, the refrigeration cycle of the refrigerator with the above structure connects the discharge port 4a of the compressor 4 to the inflow end of the refrigerant pipe of the cooler 6 via the condenser 5 and the capillary tube 13. The outlet end of the cold soot pipe of the cooler 6 is connected to the suction port 4b of the compressor 4 via a suction pipe 14. The electric circuit that controls the operation of this refrigeration cycle is shown in FIG. In FIG. 3, 15 is a first control switch that is turned on and off by detecting the temperature of the cooler 6, 16 is a second control switch that is turned on and off by sensing the temperature of the cool storage body 9, and 17 is a 18 is a normally closed push button switch; 19 is a timer; the timer 19 is turned off by energizing the timer 19; and the first relay switch 20 is turned off by energizing the timer 19. and a second relay switch 21 that is activated. Then, the first control switch 15, the first relay switch 20, and the compressor 4 are connected in series to the AC power source 22, and the push plow switch 17, the second control switch 16, and the push plow switch are connected in parallel to this series circuit. A series circuit of a plow switch 18 and a timer 19 is connected, and a second relay switch 21 is connected in parallel with the push nail switch 17, and an indicator lamp 23 is connected in parallel with the timer 19. Next, the operation of the above configuration will be explained. In normal operating conditions, the energizing path of the timer 19 is open, and therefore the operation of the compressor 4 is controlled by the first control switch 15. That is, when the temperature of the cooler 6 reaches a predetermined upper limit setting or higher, the first control switch 15 is turned on to start the operation of the compressor 4, and as a result of this operation, the cooler 6 produces a cooling effect, and the storage body 9 is heated. At the same time, the storage chamber 2 is also cooled. In this case, since the cooling action of the main cooling section 7 is primarily performed on the cold storage body 9, the auxiliary cooling section 8
If it is assumed that the storage compartment 2 is not provided with the storage compartment 2, it is likely that the storage compartment 2 will not be cooled down easily, and the cooling of the storage compartment 2 will be delayed in time, which will have an adverse effect on the stored food. However, in this embodiment, since the cooler 6 is equipped with an auxiliary cooling section 8 in addition to the main cooling section 7, the storage chamber 2 is cooled by the auxiliary cooling section 8 from the beginning of the operation of the compressor 4. , and there are no blinds that cause cooling time delays. When the temperature of the cooler 6 reaches a predetermined lower limit temperature due to the operation of the compressor 4 as described above, the first control switch 15 is turned off to stop the operation of the compressor 4. By repeatedly operating and stopping the compressor 4 in this way, the temperature inside the storage room 2 is maintained at an appropriate temperature (around 3°C).
will be maintained. By the way, when the compressor 4 is in operation, frost may adhere to the cooler 6 and the cold storage body 9, but as is well known, the frost is naturally defrosted when the compressor 4 is stopped. Then, the defrosting water is sent to the cooler 6.
Since both the main cooling part 7 and the cold storage body 9 are inclined downwardly toward the rear, water can be poured into the water receiving gutter 11 from the lower end of the auxiliary cooling part 8 and the descending end of the cold storage body 9, respectively, without dripping on the way.
and is discharged into the evaporation pan through the drain pipe 12. Now, when going to bed, when the pusher 0 switch 17 is pressed to temporarily turn it off, the timer 19 is energized, which turns off the first relay switch 20 and closes the energizing path of the compressor 4. When the timer 19 is opened, the second relay switch 21 is turned on to form a self-holding circuit for the timer 19. Therefore, during the operation time of the timer 19 (set to 6 to 8 hours according to the average sleeping time) ), the compressor 4 is never operated, and the noise from the compressor 4 will not disturb your sleep.

While the operation of the compressor 4 is stopped, the storage material in the cold storage body 9, which has been cooled and frozen due to the previous operation, is melted by the heat in the storage chamber 2, so that the inside of the storage chamber 2 is Maintained at an appropriate temperature. During cooling by the regenerator 9, the regenerator 9 and the cooler 6 are insulated from the heat insulating plate 1, so a capillary tube connects the cooler 6 and the compressor 4 outside the shield. There is no leakage in which the cold storage body 9 exchanges heat with the outside of the refrigerator via refrigerant pipes such as the suction pipe 13 and the suction pipe 14, and the storage room 2 can be effectively cooled by the cold storage body 9. Then timer 1
When the operation of the compressor 9 stops, the first relay switch 20 is turned on and the second relay switch 21 is turned off, so that the refrigeration cycle returns to the normal operating state, and the operation of the compressor 4 is controlled by the first control switch. 15. Of course, even if the timer 19 is in operation, it is possible to forcefully return to the normal operating state by temporarily turning it off by pressing the pusher switch 18, and it is also possible to force the regenerator to return to the normal operating state. When cooling by the cool storage body 9 is no longer performed effectively, the second control switch 16 is turned off to automatically return to the normal operating state. By the way, FIG. 4 shows the amount of cold stored in the cold storage body 9 (the amount of heat that can be removed from the high temperature side) when the thermal resistance of the heat insulating plate 10 is varied. This shows the results of an experiment to see how the temperature of the air and stored food in the storage room 2 changes. Line A in Figure 4 shows the amount of cold stored in the cold body 9, and line B shows the amount of cold stored in the storage room 2. The C line shows the air temperature, and the C line shows the temperature of the stored food. In addition, in this experiment, the compressor 4 was operated continuously for 6 hours, and the amount of cool storage in the cool storage body 9 immediately after that, and the amount of cool storage in the storage chamber 2 were measured.
This is a measurement of the air temperature inside the container and the temperature of the stored food.
According to this FIG. 4, the thermal resistance of the heat insulating board 10 is 0. water. ○
/Kcal (h is time) is preferably set to around 300°C and 9°C, which is the optimum temperature for the air temperature in the storage room 2 and the stored food, respectively, and also reduces the amount of cold storage in the cold storage body 10. It turns out that it can also be reduced to about 100Kcal. By the way, the amount of cold storage for 100Kcal is 8 times in a storage room with a capacity of about 60℃ under conditions of 30℃ overflowing with outside air.
This corresponds to having enough cooling capacity to maintain the cooling temperature at 1000 Hz or less for an hour. In addition, in FIG. 4, when the thermal resistance of the heat insulating plate 10 becomes about 0.0 degrees Celsius/Kcal, the amount of cool storage in the cool storage body 9 becomes close to zero, which is about 0.0 degrees Celsius. With a thermal resistance of about ○/Kcal, heat is actively exchanged between the cooler 6 and the lining material 9, so when the lining material (ethanol aqueous solution) in the cold storage material 9 freezes, it is released. The cooler 6 is heated by the heat of solidification, and as a result, the evaporation temperature of the cold soot in the cooler 6 (usually -2 is about 0) is equal to the solidification temperature of the cold storage village (about -15q0), and the cold soot is stored. This is thought to be because the lining material cannot be solidified. That is, the amount of cold storage in the cold storage body 9 In other words, the amount of heat that can be removed from the high temperature side depends on the heat of dissolution when the solidified cold storage material melts, but if the evaporation temperature of cold soot is equal to the solidification temperature of the cold storage material. The cold storage material hardly solidifies, so the cold storage body 9 has almost no cooling capacity and is in a state where the amount of cold storage is zero. In the above embodiment, the second control switch 16 is provided to detect the temperature rise of the lining body 9 and turn off the timer 19.
This is not necessary.

Fig. 5 shows another embodiment of the electric circuit, and in Fig. 5, 24 is a seesaw-shaped second control switch corresponding to the second control switch 16 in the above embodiment; This is always a piece of bush (c-a
) is closed, and when the pusher 025 is pressed to stop the operation of the compressor 4, the gap between the saddle pieces (c-a) is opened and the gap between the saddle pieces (c-b) is closed. Switch.

When the compressor 4 stops operating, the storage chamber 2 is cooled and maintained at an appropriate temperature by the cold storage body 9, and when all the cold storage material in the cold storage body 9 melts and the temperature of the cold storage body 9 reaches a predetermined upper limit setting temperature or higher, the second control switch is activated. 24 is automatically switched to open the space between the bale pieces (c-b) and close the contact piece (ca), thereby restoring the refrigeration cycle to its normal operating state.
Note that the first control switch 15 and the second control switches 16 and 24 may be activated by detecting the air temperature within the storage chamber 2. Further, the heat insulating layer may be an air layer. As is clear from the above description, in the present invention, a cold storage body is attached to a cooler through a heat insulating layer, so that
Even if the compressor is stopped in order to avoid noise during sleep, the inside of the refrigerator can be kept cool to a predetermined low temperature by the cold storage element, and the heat insulating layer protects the cooler from the outside. It is possible to provide a refrigerator that can effectively cool the inside of the refrigerator over a long period of time without having to worry about the cold storage body exchanging heat with the outside of the refrigerator via a refrigerant pipe connecting the compressor or the like.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a longitudinal cross-sectional side view of a refrigerator, Figure 2 is a refrigeration cycle configuration diagram, Figure 3 is an electric circuit diagram, and Figure 4 is a diagram of the refrigeration cycle. 5 is a diagram showing experimental results, and FIG. 5 is a diagram corresponding to FIG. 3 showing another example. In the figure, 6 is a cooler, 7 is a main cooling section, 8 is an auxiliary cooling section, 9
1 is a cold storage body, 10 is a heat insulating plate, 15 is a first control switch, 16 and 24 are second control switches, 2
0 and 21 are first and second relay switches. Figure 2 Figure 3 Figure 5 Figure 1 Figure 4

Claims (1)

[Claims] 1. A refrigerator characterized in that a cold storage body is attached to a cooler that cools the inside of the refrigerator via a heat insulating layer.