JPS609663Y2 - refrigerator - Google Patents

Description

[Detailed description of the invention] This invention relates to a two-temperature refrigerator that has a cooling chamber at the top of the main unit and a partition plate inside the refrigerator to form a freezing chamber at the top and a refrigerator chamber at the bottom. The refrigeration suction duct ensures stable cold air circulation regardless of the amount of stored load, and the cold air flow from the freezer to the cooling room prevents cold air from flowing back into the refrigerator when the temperature of the refrigerator is appropriate. purpose.

An example of the present invention will be explained below with reference to the drawings. Fig. 1.2 Fig. 1 shows a refrigerator whose main body is composed of a heat insulating wall 2 with an opening at the front. A refrigerator compartment 5 is formed in the lower part of the chamber 4, and a heat insulating door 6.6 which can open and close the front openings of both chambers is pivotally attached to the main body.

Reference numeral 7 denotes a cooling room equipped with a cooler 8 and a blower 9 that stops operating only during defrosting. It is formed by arranging a heat insulating box 12 with a bottom opening at the top, and communicates with the freezer compartment 4 through both openings.

Reference numeral 13 denotes a refrigeration suction duct provided at the rear of the freezer compartment 4, and as shown in FIGS. 3 to 5, the duct 13 is a plate member 14 which is spaced from the back wall 2b of the heat insulating wall at an appropriate distance and has an opening 14a at its lower end. and,
A plate 1 having an opening 15a at its upper end and having an appropriate distance from the plate.
5, the cold air blown from the cooling chamber 7 into the freezing chamber 4 through the blow-off opening 10 is bypassed as shown by the arrow and guided into the cooling chamber 7 through the suction opening 11.

Reference numerals 16 and 17 denote a refrigeration suction duct and a refrigeration suction duct, which are both independently installed in the refrigeration suction duct, and the upper ends of both ducts are connected to the suction opening 11 together with the upper end of the refrigeration suction duct 13. , the lower end penetrates through the partition plate 3 and is installed in a suction/discharge box 18 provided in the refrigerator compartment 5.

Reference numerals 16a and 17a are flanges provided at the upper ends of both ducts, which reduce the amount of contact between the low-temperature cold air that circulated in the freezer compartment 4 and the relatively high-temperature cold air that circulated in the refrigerator compartment 5 at the suction openings. This prevents the suction opening 11 from being blocked due to frost formation caused by the temperature difference.

As shown in FIG. 3, a partition plate 19 is disposed in the center of the suction/discharge box, and a refrigerating blower 2 that is turned on and off by a refrigerating room thermostat (not shown) is installed on the refrigerating blow-off duct side.
A suction chamber 21 is formed on the side of the refrigeration suction duct.

The blow-out chamber is formed with a blow-off port 20a that blows out cold air from the refrigeration blow-off duct 16 into the refrigerator compartment 5, and a suction port 20b that makes the cold air of the refrigerator room join the cold air from the blow-off duct. The cold air introduced into the air outlet chamber 20 through the duct 13 and the refrigeration air outlet duct 16 is mixed with the cold air in the refrigerator compartment 5 at this air outlet, and the temperature of the cold air blown out from the air outlet 20a into the refrigerator room 5 is adjusted to a temperature suitable for refrigeration. The temperature is raised to a temperature higher than 100 to prevent food stored in the vicinity of the air outlet 20a from freezing, and the suction chamber is formed with an inlet 21a for sucking cold air from the refrigerator compartment 5 into the refrigeration suction duct 17. .

To explain the cold air circulation in the refrigerator compartment, when the temperature inside the refrigerator compartment is higher than the set value, the refrigerator blower 22 is operated and a part of the cold air from the freezing suction duct 13 to the cooling compartment 7 is blown out from the refrigerator blow-off duct 16. The air is guided to the chamber 20, mixed with the cold air inside the refrigerator in the blow-out chamber, and blown out into the refrigerator at a temperature suitable for refrigeration.After circulating inside the refrigerator, it passes through the refrigeration suction duct 17 via the suction chamber 21. The circulating flow is guided to the cooling chamber 7 and cools the inside of the refrigerator.

According to the above configuration, in order to guide the cold air from the freezing compartment 4 to the cooling compartment 7 by bypassing it using the freezing suction duct 13,
A constant amount of cold air can always be guided to the cooling chamber 7 regardless of the load, that is, the amount of products stored in the freezer compartment 4, and the cold air can be rectified to maintain uniform pressure in the duct, resulting in stable cold air circulation. can be done.

In addition, a part of the cold air rising from the refrigeration suction duct 13 and reaching the cooling compartment 7 is forced to flow downward and backward through the refrigeration blow-off duct 16 by the refrigeration blower 22 and guided to the refrigeration compartment 5. In addition, the refrigerating blow-off duct 16 and the refrigerating suction duct 17 are installed independently and spaced apart from each other in the refrigerating suction duct 13, and both are arranged at the upper end. is provided in the suction opening 11, so that the cold air returning from the refrigeration suction duct 13 to the cooling chamber 7 slightly lowers the temperature of the returned high-temperature cold air passing through the refrigeration suction duct 17, thereby reducing the heat in the cooler 8. In addition to reducing the replacement load, the cold air in the refrigeration blow-off duct 16 is led from the refrigeration suction duct 13, so that the cold air in the refrigeration compartment 5 can be reduced.
The cooling efficiency is extremely good.

Further, when the temperature of the refrigerator compartment 5 is appropriate, that is, when the refrigerator blower 22 is stopped, the refrigerator air outlet and suction ducts 16 and 17 are connected to the refrigerator compartment 5.
Similarly, the pressure is negative compared to the freezer compartment 4 and cooling compartment 7 where cold air is circulating, and therefore when the refrigeration blower 22 is stopped, the cold air returning from the freezing compartment 4 to the cooling compartment 7 is There is no leakage from the suction ducts 16 and 17 into the refrigerator compartment 5, and as a result, both the ducts become air-locked due to the load, thus preventing cold air from flowing back into the refrigerator compartment 5 without using an opening/closing device such as a damper. can do.

As mentioned above, the main body of the present invention is made up of an insulating wall with a blow-off opening in the front part of the ceiling wall and a suction opening in the rear part, and a partition plate is arranged inside the refrigerator, and a freezer compartment is placed in the upper part. A cooling chamber is formed in the lower part, and an insulating box with an opening on the bottom is placed in the upper part of the main body so as to cover both openings, and a cooling chamber is formed in which a cooling chamber and a blower whose operation is stopped only during defrosting are placed. A refrigeration blow-off duct is provided on the back wall of the heat insulating wall, which takes in cold air blown from the cooling chamber into the freezing chamber from above, first guides it downward, then detours it so as to guide it upward, and returns it to the cooling chamber through the suction opening. A refrigeration blow-off duct stands along the refrigeration suction duct and guides some of the cold air near the suction opening to the refrigeration room using a refrigeration blower, out of the cold air returning from the refrigeration suction duct to the cooling room; A refrigeration suction duct for returning the refrigeration gas to the cooling room from near the suction opening is formed in the refrigeration suction duct independently and spaced apart from each other, so that the refrigeration suction duct Due to the bypass effect, the amount of cold air passing through the refrigeration suction duct can be kept constant regardless of the product load in the freezer compartment, and the cold air can be rectified to maintain its pressure uniformly, resulting in stable cold air circulation. The temperature of the return high-temperature cold air passing through the refrigeration suction duct can be lowered by the return low-temperature cold air passing through the refrigeration suction duct, reducing the heat exchange load on the cooler, which is further guided to the refrigeration blow-off duct. Since cold air can only be supplied from the refrigeration suction duct, the cooling efficiency of the refrigerator compartment can be maintained at an extremely high level.Furthermore, when the refrigerator compartment blower is stopped, the air lock effect of both the refrigeration blow-off and suction ducts allows air to be removed from the freezer compartment. Completely prevents cold air from leaking into the refrigerator compartment.

[Brief explanation of the drawings] Figure 1 is a front view of the proposed refrigerator with the door open, and Figure 2 is Figure 1 A-
A' sectional view, FIG. 3 is a perspective view of the same essential part, FIG. 4 is a longitudinal sectional view of the same essential part, and FIG. 5 is a plan view of the essential part. 12...Insulation box, 13...Suction duct for refrigeration, 16...Blowout duct for refrigeration, 17...
... Refrigeration suction duct, 22 ... Refrigeration blower.

Claims (1)

[Scope of utility model registration request] The main body is composed of an insulating wall with an air outlet opening at the front and a suction opening at the rear of the ceiling.A partition board is installed inside the storage room to form a freezer compartment at the top and a refrigerator compartment at the bottom. At the same time, a heat insulating box with a bottom opening is placed on the top of the main body so as to cover both openings, thereby forming a cooling room in which a cooler and a blower that stops operating only during defrosting are placed, and air is blown from the cooling room to the freezing room. A refrigeration suction duct is installed along the back wall of the insulating wall to take in the cooled air from above, guide it downward, then detour it so as to guide it upward, and return it to the cooling chamber through the blowing opening. Among the cold air that returns to the cooling room from the refrigeration suction duct, a part of the cold air near the blowing opening is guided into the refrigerator room by a refrigeration blower, and the cold air from the refrigerator room is sent from near the blowing opening to the cooling room. A refrigerator characterized in that a refrigerating suction duct for returning air to the refrigerator is formed upright within the refrigerating suction duct, each independently and spaced apart from each other.