JPH04359777A - refrigerator - Google Patents

Abstract

PURPOSE:To prevent clogging of a return conduit with frost without using a heat insulating sheet by providing an opening on the way of a rear wall of a dew receiving tray in contact with a heat insulator, and integrally connecting the conduit disposed in the insulator. CONSTITUTION:Chilled air generated by a cooler 10 is blown by a blower 19 to a freezing chamber 2 side to cool the chamber 2, and then sucked again from a suction port 13 to the cooler 10 side. Part of the air in the chamber 2 is fed to a cold storage chamber 3 from a discharge port 14 provided at a partition wall 9 to cool the chamber 3, and then returned to the cooler 10 through a return conduit 17. A defrosting tube heater 15 is provided in a lower part of the cooler 10 thereby to melt frost adhering to the cooler 10, defrosted water is received by a dew receiving tray 16, and discharged externally from a water guide port 16a. In this case, the conduit 17 is formed integrally with the tray 16, its upper opening is connected to an opening 16c provided on the way of the rear wall of the tray 16 to prevent clogging of the conduit 17 with frost.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a return conduit for returning circulating cold air from the refrigerator compartment located at the lower part of the freezer compartment to the freezer compartment side in the dew pan installed at the lower part of the cooler installed on the back wall of the freezer compartment. Regarding the equipped refrigerator.

0002

[Prior Art] Conventional examples of this type include
There is something shown in the publication. The structure will be explained below using FIG. 3. Reference numeral 21 denotes a refrigerator main body, and this main body 21 has a freezing compartment 22 in the upper part and a refrigerating compartment 23 in the lower part. 24 is an inner box that forms the freezer compartment 22 and the refrigerator compartment 23;
5 is an outer box, and 26 is a heat insulating material. 27 is a dividing wall that partitions the freezer compartment 22 and the refrigerator compartment 23, 28 is a cooler installed on the back wall of the freezer compartment 22, and 29 is a partition between this cooler 28 and the freezer compartment 2.
2, 30 is a radiation-type defrosting tube heater installed at the bottom of the cooler 28, 31 is a dew pan installed at the bottom of the cooler 28 and the defrosting tube heater 30, not shown in the figure. However, during defrosting, the defrosting water received by the dew tray 31 is transferred to the outlet portion 3.
It is discharged to the outside via 1a. Reference numeral 32 denotes a return pipe formed integrally with the dew pan 31. Although this return pipe 32 is not shown in the figure, it is connected to the cooler 2 for forcedly circulating cold air to the refrigerator compartment 23.
This is the return passage to the bottom of 8. Therefore, this return pipe 32
One end is located in the refrigerator compartment 23, and the other end is located below the cooler 28. Further, a cooler 28 is located in an extension of the return pipe 32. 33 is a cover piece provided on the upper part of the return pipe 32, 34 is a heat insulating sheet pasted on the top surface of this cover 33, and the cover 33 with the heat insulating sheet 34 closes the return pipe 3.
2, the cold air directly below the cooler 28 is prevented from entering the return pipe 32.

0003

[Problems to be Solved by the Invention] This conventional refrigerator has the following problems. That is, (1) frost is likely to grow on the lower surface of the cover 33 of the return pipe 32; That is, although the heat insulating sheet 34 is pasted on the top surface of the cover 33, as is clear from the figure, the heat insulating sheet is at most 5 to 10 tons, so the cover 33 cannot be kept sufficiently warm. Therefore, when the warm air containing moisture enters the refrigerator compartment 23 when the refrigerator is stopped and the door is opened and rises through the return pipe 32, it collides with the back surface of the cover 33 and forms frost there. If this phenomenon is repeated, the open end 32a of the return pipe 32 will be blocked by the frost, and the refrigerator will lose its function.

(2) Since a heat insulating sheet is attached to the cover to keep it warm, there are problems in terms of workability and cost.

[0005] An object of the present invention is to obtain a refrigerator free of such problems.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the present invention provides an opening in the middle of the rear wall of the dew pan that is in contact with the heat insulating material, and a hole located in the above-mentioned heat insulating material in the opening. One end of the return pipe was connected. Also, in order to solve the problem, the upper end of the opening where one end of the return pipe is connected (the upper end of the return pipe)
A roof was provided that protruded toward the center of the dew pan.

Furthermore, in order to solve the problem, a return pipe connected to the opening of the dew pan was formed integrally with the dew pan. Furthermore, in order to solve the problem, the cooler was not located on the extension line of the opening of the dew pan to which the return pipe was connected.

[0008]

[Function] In the case of the return pipe according to the present invention, the humid air that enters the refrigerator when the refrigerator is stopped and the door is opened rises through the return pipe and reaches the condensation tray side. It hits a bend near the opening. However, since the bent portion of the present invention is embedded in the heat insulating material, it exits from the opening and reaches the cooler without condensation. This prevents frost from growing on the return route and blocking the return route, as was the case in the past.
Always perform its original function.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be explained below with reference to an embodiment shown in the drawings. FIG. 1 is a vertical cross-sectional view of main parts of a refrigerator equipped with the present invention.
FIG. 2 is an enlarged view of the vicinity of the dew pan in FIG. 1. In the figure, a refrigerator main body 1 has a freezer compartment 2 and a refrigerator compartment 3 inside. A freezer compartment door 4 and a refrigerator compartment door 5 for closing the front openings of the compartments 3 and 4 are provided, and an inner box 6 forming the compartments 3 and 4 is also provided. The refrigerator main body 1 is composed of an inner box 6, a heat insulating material 7, and an outer box 8. Reference numeral 9 indicates a partition wall that partitions the freezer compartment 3 and the refrigerator compartment 4, and 10 indicates a cooler installed on the back wall of the freezer compartment 2. Reference numeral 11 denotes a partition plate that partitions the cooler 10 from the freezer compartment 2, and the partition plate 11 is provided with an outlet 12 and an inlet 13. Reference numeral 19 denotes a blower for circulating cold air installed on the upper part of the cooler 10, which faces the air outlet 12, and blows out the cold air that has passed through the cooler 10 to the freezer compartment 2 side. The cold air blown into the freezer compartment 2 cools the freezer compartment 2, and then is sucked into the cooler 10 again through the suction port 13. On the other hand, a part of the cold air that has cooled the freezer compartment 2 reaches the refrigerator compartment through the discharge port 14 provided in the partition wall 9. After cooling the refrigerator compartment 3, it circulates as indicated by arrow P and returns to the cooler 10 via the return pipe. Reference numeral 15 denotes a radiation-type defrosting tube heater installed at the bottom of the cooler 10; 16 a dew pan installed at the bottom of the cooler 10 and the defrost tube heater 15; and the dew pan 16 is attached to the cooler 10. Receives the defrosting water that was used to melt the frost with the defrosting tube heater. Although not shown in the figure, the defrosting water accumulated in the dew pan 16 is discharged to the outside via a water inlet 16a provided in the dew pan 16. 17 is a return pipe. This return pipe 17 is integrally formed with the previous dew pan 16, one opening 17a faces the refrigerator compartment 3, and the other opening 17b is the rear wall 16b of the dew pan 16 (the wall passing through the heat insulating material 7). It is connected to an opening 16c provided in the middle. Therefore, the previous return pipe 17 is located in the heat insulating material 7, as shown in the figure. In other words, the extension line of this return pipe 17 is the heat insulating material 7 and not the cooler 10. The return cold air from the refrigerator compartment 30 described above is sucked in through the opening 17a of this return pipe 17, and sucked into the cooler 10 side through the other opening 17b. 18 is the rear wall 16 of the dew pan 16 to which one end of the return pipe is connected.
This is the roof installed on b. This roof 18 is a cooler 10
This is to prevent more dripping defrost water from entering the return pipe 17. Of course, when the refrigerator operation is stopped, cold air descending from the cooler 10 is also prevented from entering the return pipe 17 to some extent.

[0010] As described above, since the return pipe 17 that returns the cold air that has cooled the refrigerator compartment 3 side to the cooler 10 is not located below the projection plane of the cooler 10, when defrosting the cooler 10, Of course, it is difficult for defrosting water to enter the return pipe 17, and when the refrigerator is stopped, the cold air that has descended from the cooler 10 does not directly enter the return pipe 17. Of course, at this time the roof 18
works to prevent water droplets and cold air from entering. On the other hand, air containing moisture that enters the return line 17 from the refrigerator compartment side due to natural convection returns to the cooler 10 without being cooled during the return line. This is because the return pipe 17 is buried in the insulating material foamed in place.

[0011]

[Effects of the Invention] According to the present invention, frost clogging of the return pipe can be prevented without using a heat insulating sheet or the like.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of main parts of a refrigerator according to the present invention;

[Figure 2] Figure 1
Enlarged view of the area around the inner dew pan,

FIG. 3 is an enlarged view of the vicinity of the dew pan, showing a conventional example.

[Explanation of symbols]

1...refrigerator body, 2... Freezer room, 3...Refrigerating room, 4, 5...door, 6... Inner box, 7...Insulation material, 8...outer box, 9... Partition wall, 10...Cooler, 11... Partition plate, 12... air outlet, 13... Suction port, 14...discharge port, 15...Defrosting pipe heater, 16... Dew saucer, 17...Return route, 18...roof, 19...Blower

Claims (4)

[Claims] 1. A refrigerator characterized in that an opening is provided in the middle of the rear wall of the drain tray in contact with a heat insulating material, and one end of a return pipe located in the heat insulating material is connected to the opening. 2. The refrigerator according to claim 1, wherein one end of the return pipe is connected and a roof is provided at an upper end of the return pipe that projects toward the center of the drain tray. 3. The refrigerator according to claim 1, wherein the return pipe connected to the opening of the dew pan is formed integrally with the dew pan. 4. The refrigerator according to claim 1, wherein the cooler is not located on an extension of the opening of the dew pan to which the return pipe is connected.