JPH0522829B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a refrigerator that is equipped with a freezer compartment and a refrigerator compartment, and is provided with a compartment for independently circulating cold air within the refrigerator compartment, and particularly relates to a refrigerator that is provided with a compartment for independently circulating cold air within the compartment. Concerning the structure of the department.

Structure of the conventional example and its problems The conventional example will be explained with reference to FIGS. 6, 7, and 8. Reference numeral 1 denotes a refrigerator body, which is composed of an outer box 2, an inner box 3, and a foamed heat insulating material 4 filled between these two boxes, and is partitioned by a partition wall 5 into a freezing compartment 6 in the upper part and a refrigerating compartment 7 in the lower part. ing. Further, a refrigerator 8 for a refrigeration cycle and a blower 9 for forced ventilation are provided at the rear of the freezer compartment 6, a temperature control device 10 is provided at the rear of the top of the refrigerator compartment 7, and a partition wall 5 is provided at the top of the refrigerator compartment 7. A semi-hermetically sealed compartment 11 is provided, which has a ceiling as a top plate and communicates with the temperature control device 10. The temperature control device 10 includes a damper thermostat 12 in the center that controls the amount of cold air flowing into the refrigerator compartment 7, and a damper thermostat 13 adjacent to this damper thermostat 13 that independently controls the amount of cold air flowing into the compartment 11. and a discharge air passage 14 and a discharge outlet 15 which extend downwardly to the refrigerator compartment 7, a discharge air passage 16 which extends in a substantially L-shape from the damper thermostat 13, and a rear end center of the compartment 11. A discharge port 17 that opens toward the front and faces the vicinity of the portion is integrally formed. Reference numeral 18 denotes a main discharge air passage, one end of which is opened on the discharge side of the forced draft blower 9, and the other end of which is branched through a branch port 19.
One of them is open to the damper thermostat 12 for the refrigerator compartment, and the other is open to the damper thermostat 13 for the compartment.
Further, reference numerals 20, 21, and 22 are suction ports of the freezing room, the refrigerator room, and the compartment, respectively, which are formed by the insulation material 23 in the compartment wall 5, and are a freezer compartment suction air passage 24, a refrigerator compartment suction air passage 25, and a compartment suction air. They are respectively connected to the passages 26 and communicated with the lower end of the cooler 8 .

In such a configuration, the cold air generated by the cooler 8 is cooled by the blower 9 into the freezer compartment 6 and then passed through the suction port 2.
0, it is returned to the cooler 8 through the freezer compartment suction air path 24. At the same time, the air is supplied to the refrigerator compartment 7 through the main discharge air passage 18, on the other hand via the damper thermostat 12, from the discharge air passage 14 and the discharge outlet 15 in a controlled manner. It is returned to the cooler 8 through the rear suction port 21 and the refrigerator compartment suction air path 25. On the other hand, it branches from a branch port 19 provided in the main discharge air passage 18,
The air flows through a substantially L-shaped discharge air passage 16 via a damper thermostat 13 and enters the compartment 11 from a discharge port 17.
controlled within the appropriate amount. After being supplied, the suction port 2
2 and is returned to the cooler 8 through the compartment suction air path 26.

However, the operating rate of the compressor 29 decreases as the outside air temperature decreases, and the stagnation time of the cold air to the lower end of the cooler 8 becomes longer. The stagnant cold air affects the compartment 11 via the heat insulating material 23 in the compartment wall 5. Therefore, as the outside air temperature decreases, the influence on the compartment 11 is large, and the temperature of the compartment 11 decreases, but the damper thermostat 13 which controls the amount of cold air to the compartment 11 until a certain outside temperature reaches a certain level.
As a result, the temperature of the compartment 11 can be maintained at the initial setting temperature. However, even when the outside air temperature is really low (approximately 10 degrees Celsius or less) and the desired low temperature state can be maintained even if the supply of cold air to the compartment 11 is small, the external temperature is Due to the effects of the cooler 8, which has become extremely low at room temperature, control by the damper thermostat 13 cannot be performed and the temperature of the compartment 11 drops significantly. As a result, the temperature of the food cannot be controlled during storage, resulting in a shortened storage period and the risk of freezing and damaging the food.

Purpose of the Invention In view of the above-mentioned points, the present invention aims to prevent the temperature inside the compartment from decreasing under low outside temperatures (approximately 10° C. or less) and to maintain a constant temperature range regardless of the outside air temperature.

Structure of the Invention In order to achieve this object, the present invention provides a heater around the outlet of the cold air discharge passage into the compartment, and controls the energization of the heater based on the outside air temperature. By applying electricity at temperatures below 30°F (°C or below), the discharged cold air is heated to an appropriate temperature and discharged evenly into the compartment, preventing the temperature from dropping under low outside temperatures and maintaining a constant temperature range. .

DESCRIPTION OF EMBODIMENTS Hereinafter, FIGS. 1 to 5 show an embodiment of the present invention.
This will be explained according to the diagram. Incidentally, parts that are the same as those in the prior art are given the same reference numerals, and detailed explanation thereof will be omitted.

In the figure, 16 is a discharge air path to the compartment 11;
Reference numeral 17 denotes discharge ports provided on the left and right sides of the center of the compartment 11, and located at the lower end portion of the cooler 8 via the compartment wall 5. A heater 27 is provided around the discharge port 17 and is configured to be energized at, for example, 10° C. or lower by an outside temperature thermostat 28 provided on the outer shell of the main body 1.

Next, the electrical circuit diagram will be described. Reference numeral 29 is a compressor, which is connected in parallel with the forced draft blower 9 and then connected to the power source via the contacts of the thermostat 30.

Furthermore, the heater 27 for compensating for the low outside temperature of the compartment 11 is connected in series with the outside temperature thermostat 28 and then connected to both ends of the power source.

In such a configuration, the outside temperature thermostat 2
8 does not operate, the cold air cooled by the cooler 8 flows into the compartment 11 via the damper thermostat 13, the discharge air passage 16, and the discharge port 17 by the blower 9, and is cooled to a desired temperature. . Further, when the outside air temperature decreases and the outside temperature thermostat 28 is activated, the heater 27 is energized, and when the flap of the damper thermostat 13 is open, the discharge port 17 is turned on.
The cold air immediately after flowing into the compartment 11 is heated by the heater 27, adjusted to an appropriate temperature, and discharged, cools the compartment 11 evenly, circulates, and is recovered from the suction port 22. When the flap of the damper thermostat 13 is closed, the cold air stagnant at the lower end of the cooler 8 is heated by the heater 27 through the heat insulating material 23 in the partition wall 5. By repeatedly opening and closing the flap of the damper thermostat 13, the temperature of the compartment 11 is prevented from becoming too low.

Effects of the Invention As is clear from the above configuration, the present invention has a freezing chamber partitioned in the upper part by a partition wall, a cooling chamber partitioned in the lower part, and a partitioned room provided in the top of the refrigerator room. a damper thermostat for controlling the amount of cold air to the refrigerator compartment; a damper thermostat for controlling the amount of cold air to the compartment; a discharge air path and outlet to the refrigerator compartment including both damper thermostats; A temperature control device is provided in which a discharge circuit to the chamber and a discharge port are integrally formed, a heater is provided around the discharge port of the compartment of the temperature control device, and energization of the heater is controlled based on the outside air temperature. The temperature of the cold air supplied into the compartment from the discharge port is heated by the heater when the outside air temperature drops below a certain temperature and is evenly discharged, so the temperature inside the compartment remains constant regardless of the outside air temperature. The temperature is maintained and there is no problem of food freezing at low outside temperatures. In addition, since the discharged air itself is heated to an appropriate temperature and supplied into the room, there is no uneven heating temperature caused by a heater, and it is suitable for storing foods that require maintenance and control within a certain temperature range. This has an extremely large practical effect.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the essential parts of a refrigerator showing an embodiment of the present invention, Fig. 2 is a front view of Fig. 1, and Fig. 3 is a longitudinal sectional view of a refrigerator using the main part structure of Fig. 1. , 4th
The figure is another sectional view of the temperature control device part in Figure 3, and Figure 5.
The figure is an electrical wiring diagram, Figure 6 is a cross-sectional view of the main part showing a conventional example, Figure 7 is a cross-sectional view of a refrigerator using the main structure of Figure 6, and Figure 8 is the temperature control device part of Figure 7. FIG. 5...Division wall, 6...Freezing room, 7...Refrigerating room,
8...Cooler, 10...Temperature control device, 11...
Compartment chamber, 12, 13... Damper thermostat, 14, 16... Discharge circuit, 15, 17... Discharge port, 27... Heater, 28... Outside temperature thermostat.

Claims (1)

[Claims] 1. A freezing chamber partitioned in the upper part by a partition wall,
a refrigerator compartment formed into sections at the bottom, a cooler housed at the rear of the freezer compartment, a compartment provided at the top of the refrigerator compartment, and a damper thermostat that controls the amount of cold air flowing into the refrigerator compartment; A damper thermostat that controls the amount of cold air to the compartment, a discharge circuit and a discharge port to the refrigerator compartment, and a discharge air path and discharge port to the compartment are integrally formed with both damper thermostats. 1. A refrigerator comprising a control device, a heater provided around a discharge port of a compartment of the temperature control device, and energization of the heater controlled based on outside air temperature.