JPH1062055A - refrigerator - Google Patents

Abstract

(57) [Problem] To provide a refrigerator capable of dehumidifying in a cool air reflux duct, reducing frost formation on an evaporator, extending a defrosting interval and saving energy. An evaporator (10) is provided on the rear side of the freezing room (8). A blower 11 for circulating cool air exchanged in the heat exchanger 10 to each chamber, and an evaporating dish 12 for receiving defrost water flowing down from the evaporator 10 through a drain pipe 13. Forming a first refrigerating compartment cold air recirculation duct 22 that returns cold air from the upper part, and a second refrigerating compartment cold air recirculating duct 23 communicating from the lower part of the first refrigerating compartment cold air recirculation duct 22 to the lower part of the evaporator 10 is provided. Room 9
From the upper part of the first refrigerator compartment cool air recirculation duct 22 to form a vegetable compartment cool air recirculation duct 26 for returning cold air, branch off from the lower part of the first refrigerator compartment cool air recirculation duct 22, and communicate with the evaporating dish 10. The second drain pipe 24 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator of a forced air circulation type, and more particularly to a structure of an air passage for guiding cool air in a refrigerator or the like.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, for example, a conventional refrigerator has a main body 1 composed of an outer box 2, an inner box 3, and a heat insulating material 4 filled between these two boxes. The first partition wall 5 and the second partition wall 6 form a refrigerator compartment 7 in an upper stage, a freezing compartment 8 in a middle stage, and a vegetable compartment 9 in a lower stage. An evaporator 10 installed on the back side of the freezing chamber 8;
The cold air heat-exchanged in the refrigerator room 8, the refrigerator room 7, and the vegetable room 9
The defrost water flowing down from the evaporator 10 and the blower 11 circulating to the evaporator 10 are guided through a drain pipe 13 into a machine room formed at the lower part of the main body 1 and provided at the upper part of the compressor 14 to receive the defrost water. And an evaporating dish 12.

The cool air generated by the evaporator 10 is supplied to a blower 11
Is supplied to the freezer compartment 8, and is connected to a cool compartment air inlet 16 at the top of the evaporator 10 connected to the cool air distribution compartment 15 via a refrigerator compartment duct 17. The cold air is uniformly supplied to the refrigerator compartment 7 from the refrigerator air outlet 18 provided in the refrigerator compartment 7 as shown by the solid arrow. The cool air circulated in the refrigerator compartment 7 is supplied to the vegetable compartment cool air outlet 20 via a vegetable compartment duct 19a connected from a vegetable compartment cool air inlet 19 provided at the lower part of the refrigerator compartment 7 as shown by a broken line arrow. It is further supplied to the vegetable room 9. The cool air supplied to the vegetable compartment 9 and circulated is cooled by a cool air return duct 25 formed on the second partition wall 6.
It is returned to the lower part of the evaporator 10 through b.

By the way, the air returned to the cool air reflux duct 25b is heated to 5 to 10 ° C. which contains a lot of moisture due to the opening and closing of the doors of the refrigerator compartment 7 and the vegetable compartment 9 and diffusion of moisture from food. . For this reason, there was a problem that the evaporator 10 was frosted by the air containing much moisture returned from the vegetable compartment 9 to the evaporator 10. On the other hand, when the blower 11 is stopped, there is a problem that the cool air flows backward from the evaporator 10 to the cool air recirculation duct 25b and dew is formed in the cool air recirculation duct.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention is to prevent the dew condensation in the cool air recirculation duct and reduce the frost on the evaporator by the backflow of the cool air from the evaporator. It is another object of the present invention to provide a refrigerator that can extend the defrost interval and save energy.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an insulating box comprising an outer box, an inner box and a heat insulating material filled between the two boxes; The first partition wall and the second partition wall which are arranged in the body, form a refrigerator room in the upper stage, a freezing room in the middle stage, and a vegetable room in the lower stage, and an evaporator installed on the back side of the freezer room, A blower that circulates the heat-exchanged cool air to the freezing room, the cold room, and the vegetable room, and a duct for the cold room that communicates with the upper portion of the back of the cold room from the upper portion of the evaporator and sends out the cold air to the cold room, A vegetable compartment duct for sending cool air from the lower portion of the refrigerator compartment to the upper rear portion of the vegetable compartment, and a freezer compartment cool air provided in the second partition wall and communicating with the lower portion of the evaporator from the lower portion of the freezer compartment to return cool air. A reflux duct and the defrost water flowing down from the evaporator through a first drain pipe; In a refrigerator including an evaporating dish provided in the upper part of the compressor and receiving the defrost water, the refrigerator returns the cool air from the upper part to the outside of the inner box of the refrigerating chamber. A refrigerator compartment cold air recirculation duct is formed, and a vegetable compartment cold air recirculation duct that communicates from an upper portion of the vegetable compartment to an upper portion of the first refrigerating compartment cold air recirculation duct to return cold air is formed. A second refrigerating compartment cold air recirculation duct communicating from the lower portion of the evaporator to a lower portion of the evaporator, a second drain pipe branched from a lower portion of the first refrigerating compartment cold air recirculating duct and communicating with the evaporating dish is provided. It has become.

[0007] Further, the first refrigerating compartment cool air recirculation duct is formed on the back surface or side surface of the inner box. Further, the vegetable room cool air recirculation duct is formed on the back surface or side surface of the inner box. Further, the cool air return port of the second refrigerator compartment cool air recirculation duct is formed above the inflow port of the second drain pipe. In addition, a configuration is adopted in which a heat conductive metal foil or a heat conductive material is attached to the back or side surface of the inner box of the first refrigerating compartment cold air reflux duct.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first refrigerating compartment cold air recirculation duct for returning cold air from the upper portion is formed outside the inner box of the refrigerating compartment, and communicates from an upper portion of the vegetable compartment to an upper portion of the first refrigerating compartment cold air recirculating duct. Forming a vegetable compartment cool air recirculation duct for returning cold air, and providing a second refrigerating compartment cold air recirculation duct communicating with a lower portion of the evaporator from a lower portion of the first refrigerating compartment cold air recirculation duct, Branch from the bottom of the duct,
With the configuration in which the second drain pipe communicating with the evaporating dish is provided, the backflow of the cool air from the evaporator prevents dew condensation in the first and second refrigerator compartment cool air reflux ducts and the vegetable room cool air reflux duct. At the same time, by reducing frost formation on the evaporator, a refrigerator that can increase the defrosting interval and save energy can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows the inside of a refrigerator from the side, and 1 is a refrigerator body composed of an outer box 2, an inner box 3, and a heat insulating material 4 filled between these two boxes. Reference numeral 5 denotes a first partition wall, and reference numeral 6 denotes a second partition wall, which forms a refrigerator room 7 in an upper stage, a freezing room 8 in a middle stage, and a vegetable room 9 in a lower stage. Reference numeral 10 denotes an evaporator installed on the back side of the freezing room 8,
Reference numeral 11 denotes a blower for forcibly circulating the cool air heat-exchanged by the evaporator 10 to the freezing room 8, the refrigerating room 7 and the vegetable room 9. 12 guides the defrost water flowing down from the evaporator 10 through a first drain pipe 13 into a machine room formed at a lower portion of the main body 1, and
14 is an evaporating dish provided at the top of 14 to receive the defrost water.

The cool air generated by the evaporator 10 is supplied to a blower 11
Is supplied to the freezer compartment 8, and is connected to a cool compartment air inlet 16 at the top of the evaporator 10 connected to the cool air distribution compartment 15 via a refrigerator compartment duct 17. The cold air is uniformly supplied to the refrigerator 7 from the cold air outlet 18 in the refrigerator as shown by the solid arrow. In addition, refrigerator room 7
Cool air is supplied to the vegetable compartment 9 from the vegetable compartment cool air outlet 20 through a vegetable compartment duct 19a connected to the vegetable compartment cool air inlet 19 provided at the lower part of the container.

A first refrigerating compartment cold air recirculation duct 22 is formed which is connected to a refrigerating compartment suction port 21 provided on the upper rear surface of the refrigerating compartment 7, passes through the back surface of the inner box 3 and communicates with the lower portion of the refrigerating compartment 7. At the same time, the vegetable room cold air recirculation duct 26 is connected to the vegetable room suction port 26a provided at the upper part of the vegetable room 9 and passes through the back of the inner box 3 and communicates with the upper part of the first refrigerator room cold air recirculation duct 22. A second refrigerating compartment cool air recirculation duct 23 is formed to communicate with a lower portion of the evaporator 10 from a lower portion of the first refrigerating compartment cold air recirculation duct 22, and the first refrigerating compartment cold air recirculation duct 22 is formed.
A second drain pipe 24 communicating with the evaporating dish 12 is formed from a lower part of the drain pipe. Further, the cool air return port 23 of the second refrigerator compartment cool air recirculation duct 23 is located above the inlet 24a of the second drain pipe 24.
a is provided to return cool air to the lower part of the evaporator 10. Further, the cool air supplied to the freezer compartment 8 is configured to return to the lower part of the evaporator 10 through a freezer cool air recirculation duct 25 formed on the second partition wall 6.

In the above configuration, the first refrigerator cold air recirculation duct 22 is disposed on the back surface of the inner box of the refrigerator room 7, and the back surface of the inner box is attached with a heat conductive metal foil and used as a heat exchange unit. 5 circulates through the refrigerator compartment 7 and the vegetable compartment 9 and contains a lot of moisture due to the opening and closing of doors and the diffusion of moisture from food.
The warm air that has reached 1010 ° C. can be cooled to a non-freezing 0-5 ° C. cold air for dehumidification through the first cool air recirculation duct 22, so that moisture in the air is dewed to a liquid state,
Water can be drained from the second drain pipe 24 to the evaporating dish 12. On the other hand, the dehumidified and dried air is returned to the lower part of the evaporator 10 through the cold air return duct 23 from the cool air return port 23a. As a result, it is possible to prevent dew condensation from occurring in the first refrigerator compartment cool air recirculation duct 22, the second refrigerator compartment cool air recirculation duct 23, and the vegetable compartment cool air recirculation duct 26, and to prevent the evaporator
The frost on 10 can be reduced.

[0013]

As described above, according to the refrigerator of the present invention, it is possible to dehumidify the moisture in the first and second refrigerator compartment cold air recirculation ducts and the vegetable compartment cold air recirculation ducts, and to form dew on these ducts. Generation can be prevented, frost formation on the evaporator can be reduced, and the defrosting interval can be lengthened to save energy.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a refrigerator showing an embodiment of the present invention.

FIG. 2 is a front view of the refrigerator showing an arrangement of ducts and an air passage according to the embodiment of the present invention.

FIG. 3 is a side sectional view of a refrigerator showing a conventional example.

FIG. 4 is a front view of a refrigerator showing an arrangement of ducts and an air passage according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 3 Inner box 5 First partition wall 6 Second partition wall 7 Refrigerator room 8 Freezer room 9 Vegetable room 10 Evaporator 11 Blower 12 Evaporating dish 13 First drain pipe 15 Cold air distribution room 16 Cold room cold air inlet 17 Refrigerator Room duct 18 Cold room cold air outlet 19 Vegetable room cold air inlet 20 Vegetable room cold air outlet 21 Cold room inlet 22 First cold room cold air return duct 23 Second cold room cold air return duct 24 Second drain pipe 24a Inlet 25 Freezer room cool air return duct 26 Vegetable room cool air return duct 26a Vegetable room inlet

Claims (5)

[Claims] 1. An insulating box body comprising an outer box, an inner box, and a heat insulating material filled between the two boxes, disposed in the insulating box body, a refrigerator room in an upper stage, a freezing room in a middle stage, and a vegetable room in a lower stage. A first partition wall and a second partition wall forming a, an evaporator installed on the back side of the freezing room, and a blower for circulating cold air heat exchanged by the evaporator to the freezing room, the refrigerator room and the vegetable room. A duct for a refrigerator compartment communicating from the upper portion of the evaporator to an upper rear portion of the refrigerator compartment and sending cool air to the refrigerator compartment; and a duct for a vegetable compartment delivering cold air from the lower portion of the refrigerator compartment to the upper portion of the vegetable compartment rear portion. A freezer compartment cool air recirculation duct, which is provided in the second partition wall, communicates from the lower portion of the freezer compartment to the lower portion of the evaporator and returns cold air, and defrost water flowing down from the evaporator through the first drain pipe. Guide into the machine room formed at the lower part of the heat insulation box, at or near the upper part of the compressor A refrigerator that is provided with an evaporating dish that receives the defrost water, wherein a first refrigerating compartment cold air recirculation duct that returns cold air from an upper portion is formed outside the inner box of the refrigerating compartment, and the A second refrigerator compartment cold air reflux communicating with the upper portion of the first refrigerator compartment cold air reflux duct to form a vegetable compartment cold air reflux duct for returning cold air, and communicating with the lower portion of the evaporator from the lower portion of the first refrigerator compartment cold air reflux duct. A refrigerator, comprising: a duct; and a second drain pipe branched from a lower portion of the first refrigerating compartment cool air recirculation duct and communicating with the evaporating dish. 2. The refrigerator according to claim 1, wherein the first refrigerating compartment cold air recirculation duct is formed on a back surface or a side surface of the inner box. 3. The refrigerator according to claim 1, wherein the vegetable compartment cool air recirculation duct is formed on a back surface or a side surface of the inner box. 4. The refrigerator according to claim 1, wherein a cool air return port of the second refrigerator compartment cool air recirculation duct is formed above an inlet of the second drain pipe. 5. A heat conductive metal foil or a heat conductive material is attached to the back or side surface of the inner box of the first refrigerator compartment cold air recirculation duct.
The refrigerator as described.