JPH0754230B2 - refrigerator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cold air forced circulation type refrigerator having a freezer compartment, a refrigerating compartment, and a third compartment.

Conventional Technology A conventional example will be described with reference to FIGS. 6 to 9. Reference numeral 1 denotes a refrigerator body, which is composed of a heat insulating material 4 filled between an outer box 2 and an inner box 3. Reference numeral 5 is a partition wall, which forms a freezer compartment 6 in the upper part and a refrigerating compartment 7 in the lower part. Reference numeral 8 is a third chamber provided in the refrigerating chamber 7. Reference numeral 9 denotes a cooler of a refrigeration cycle, and a blower (not shown) provided above the cooler and a duct 10 for forcedly ventilating cool air into the refrigerating compartment 7 and the third compartment 8. Reference numeral 11 denotes a temperature control device, which has a damper opening / closing device for controlling the amount of cold air discharged to the refrigerating chamber 7 and a cool air discharge passage (not shown) to the refrigerating chamber 7 inside, and cool air to the third chamber 8 as well. A damper opening / closing device 12 for adjusting the discharge amount and a temperature sensing portion 13 are housed in the substantially central portion, and a cool air discharge passage 14 and a cool air discharge port 15 to the third chamber 8 are formed. The third chamber 8 comprises a partition wall 5 on the ceiling surface, a cover 16 of the temperature control device 11 on the back surface, a door 17 on the front surface, an inner box 3 on the side surface, and a bottom plate 18 on the bottom surface.

In such a configuration, the cold air cooled by the cooler 9 is forcedly circulated to the freezer compartment 6 and reaches the temperature control device 11 via the duct 10 so that the damper opening / closing device (not shown) for the refrigerating compartment
And the third chamber damper opening / closing device 12 controls and cools the refrigerating chamber 7 and the third chamber 8 so that the cold air discharge amount is controlled to an appropriate amount so as to reach a desired temperature. Incidentally, here, the third chamber 8 has a temperature range (for example, 0 to 0 ° C.) lower than a normal refrigerating temperature (0 to 10 ° C.).
The temperature is often set to -3 ° C), and it is often used in a dedicated low temperature room for storing fresh food such as fish and meat which requires stable low temperature storage to maintain freshness.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The temperature-sensing portion 13 is provided at a substantially central portion of the temperature adjusting device 11 on the back surface of the third chamber 8 because it is not easily affected by outside air when the door 17 is opened and closed during actual use. Since this portion is less susceptible to cooling by the duct 10 maintained at a low temperature and the endothermic effect of the outside air from the door 17 and the inner box 3 on the side wall,
As shown in FIGS. 9 and 9, the temperature is maintained almost constant even when the outside air temperature changes or the refrigerating chamber 7 temperature changes.
On the other hand, in the third chamber 8, the upper part is the partition wall 5 and the lower part is the refrigerating chamber 7.
In addition, because the rear side is surrounded by duct 10, and the three sides are surrounded by low temperature parts other than the outside air, the heat absorption load into the room is small due to the arrangement structure, and the purpose is to cool the room with a small amount of cooling. Therefore, since it is not necessary to positively introduce the discharged cold air, the damper opening / closing device 12 needs to respond to a slight change in the heat absorption load amount in the room. However,
If the temperature sensing portion 13 is disposed in the rear center of the third chamber 8 and substantially in the center, as described above, the temperature of the outside air decreases and the damper opening / closing device for the refrigerating chamber is set to a low temperature so that the temperature sensing part 13 enters the third chamber 8. Even if the amount of heat absorption load decreases, the ambient temperature of the temperature sensing part 13 does not change significantly, so the third chamber damper opening / closing device 12 is controlled in a state where the amount of heat absorption load is large. Due to this delay in response, the excess cold air that has flowed into the third chamber 8 may supercool the food and freeze it. On the contrary, when the damper opening / closing device for the refrigerating compartment is set to a high value, even if the heat absorption load amount into the third compartment 8 increases, the temperature sensing unit 13
Since the ambient temperature of the room does not rise accordingly, control was continued when the heat absorption load amount was smaller, and there was a risk that the room temperature would rise because the required amount of cool air was not secured. In particular, it has been a problem in use for fresh foods that require stable storage in a constant low temperature range.

The present invention is to solve the above-mentioned conventional problems, to stably control the temperature inside the refrigerator to prevent freezing of the stored food even against changes in the outside air temperature and changes in the refrigerating room temperature, and to prevent freshness. Is to be maintained for a long time.

Means for Solving the Problems In order to solve the above problems, the refrigerator of the present invention is configured such that the temperature sensing part of the damper opening / closing device of the third chamber is arranged close to the inner box connected to the refrigerating chamber. Has been done.

Operation With the above-described configuration, the present invention allows the temperature sensing section of the damper opening / closing device to detect and respond to a change in the heat absorption load into the room when the outside air temperature changes or the set temperature of the refrigerating room is changed.

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 to 5. In addition, the same reference numerals are given to the same components as the conventional one,
Only different parts will be described. Reference numeral 19 denotes a temperature control device, which has a storage portion 21 formed at a side end portion which is opened so as to face the inner box 3 and the cover 20, and the temperature sensing portion 13 of the damper opening / closing device 12 is provided in the inner portion 3 in the storage portion 21. It is housed in close proximity. Storage 21
A plurality of ventilation holes 22 are provided on the surface of the cover 20 facing the.

With this configuration, the air temperature near the temperature sensing unit 13 (the storage unit 21
The air temperature in the inside is from the outside of the third chamber 8 that combines the outside air temperature through-heat through the inner box 3 and the conduction heat from the refrigerating compartment 7 that transfers heat to the inner compartment 3 connected to the refrigerating compartment 7. Endothermic load and vent
It is determined by the amount of cold air in the third chamber 8 flowing into the storage portion 21 via 22. That is, when the outside air temperature is lowered or the refrigerator opening / closing device is set lower than usual,
When the temperature drops, the air temperature near the temperature sensing unit 13 drops accordingly. Therefore, the damper opening / closing device for the third chamber 8
Reference numeral 12 controls the amount of cold air discharged into the third chamber 8 to a small amount, and unnecessary flow of cold air is suppressed, so that freezing of stored food due to overcooling can be prevented. On the contrary, when the damper opening / closing device for the refrigerating compartment is set higher than usual and the temperature of the refrigerating compartment 7 rises,
Since the air temperature in the vicinity of the temperature sensing section 13 rises, the damper opening / closing device 12 controls the discharge cold air amount to be higher than usual, and cancels out the increase in the heat absorption load amount from the refrigerating chamber 7. As a result, the required amount of cold air is secured, and it is possible to prevent the food temperature from rising.

EFFECTS OF THE INVENTION As described above, according to the present invention, the temperature-sensing part of the damper opening / closing device of the third chamber is arranged close to the inner box connected to the refrigerating chamber, so that the outside temperature is low or the refrigerating chamber temperature is low. Even when the heat absorption load into the third room is reduced due to the lower setting, the temperature in the vicinity of the temperature sensing part decreases accordingly, and the damper opening / closing device controls the discharge cold air amount to a value smaller than usual, so As described above, it is possible to suppress supercooling due to a response delay of the damper opening / closing device and prevent freezing of food. Further, even if the temperature of the refrigerating room is set to a high value and the amount of heat absorption into the third room increases, the temperature in the vicinity of the temperature sensing part rises and the damper opening / closing device controls the discharged cool air amount to be higher than usual. Therefore, it is possible to prevent the food temperature from rising due to the shortage of the required amount of cold air due to the delay in response as in the past. Therefore, a stable and constant low temperature zone can be maintained even when the outside air temperature or the refrigerating room temperature changes, and the practical effect is high in the storage of fresh food.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view of a refrigerator showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of the refrigerator, FIG. 3 is a perspective view showing a temperature adjusting device of the refrigerator, and FIG. FIG. 5 is a temperature characteristic diagram with respect to the outside air temperature of the refrigerator, FIG. 5 is a temperature characteristic diagram with respect to the temperature setting of the damper opening / closing device for the refrigerating room, FIG. 6 is a longitudinal sectional view of a main part of a refrigerator showing a conventional example, and FIG. 7 is the same refrigerator. 8 is a perspective view showing the temperature control device, FIG. 8 is a temperature characteristic diagram with respect to the outside air temperature of the refrigerator, and FIG. 9 is a temperature characteristic diagram with respect to the temperature setting of the refrigerator opening / closing device. 3 ... inner box, 5 ... compartment wall, 6 ... freezer room, 7 ... refrigerating room, 8 ... third room, 12 ... damper opening / closing device, 13 ... temperature sensing part, 19 ... temperature Adjustment device.

Claims (1)

[Claims] 1. A freezing compartment defined by a partition wall, a refrigerating compartment, a third compartment in the refrigerating compartment that is controlled independently of the refrigerating compartment, and discharge of cool air to the third compartment. A refrigerator comprising: a damper opening / closing device for adjusting the amount; and a temperature adjusting device for accommodating the damper opening / closing device and arranging a temperature sensitive part of the damper opening / closing device in proximity to an inner box connected to the refrigerating compartment.