JP3602248B2 - refrigerator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a refrigerator formed in the order of a refrigerator compartment, a freezer compartment, and a vegetable compartment from the top.
[0002]
[Prior art]
In recent years, as the demand for frozen foods has increased, the frequency of use of refrigerators has been higher than that of refrigerators. Demand is increasing.
[0003]
Conventionally, as a means for cooling each refrigerator room formed in the order of a refrigerator compartment, a freezer compartment, and a vegetable compartment from the top, for example, JP-A-3-267677 is cited.
[0004]
Hereinafter, an example of the refrigerator described above will be described with reference to the drawings.
7 and 8 show an example of a conventional refrigerator, wherein 1 is a heat insulating box, 2 is a refrigerator room formed in the heat insulating box 1, 3 is a freezing room, and 4 is a vegetable room. Behind the freezing room 3 is a cooler room 5, in which a fan device 7 for sending cool air cooled by the cooler 6, a cooler 6, and a defrost heater 21 are provided. It is arranged in order from. A part of the cool air blown by the fan device 7 is directly sent into the freezing compartment 3 through the freezing compartment discharge port 8 and returned to the cooler compartment 5 through the freezing compartment return port 9. Reference numeral 10 denotes a refrigerating room discharge air passage for sending cool air to the refrigerating room 2, 11 denotes a refrigerating room return air passage for sending cool air to the vegetable room 4, and 12 denotes a cool air blown to the vegetable room 4 by the cooler room 5. This is the return airway for the vegetable room to return to. However, in the above configuration, since the cool air is supplied to the vegetable compartment 4 through the refrigerator compartment 2, the temperature in the refrigerator compartment return air passage 11 is high unless the air volume of the refrigerator compartment discharge air passage 10 is considerably increased, and There was a drawback that the temperature of the vegetable room 4 became higher than the target temperature due to summer, installation conditions, and the like.
[0005]
9, 10, 11, and 12 solve the above-mentioned problems, and are sent to the refrigeration compartment 2 through the refrigeration compartment discharge air port 13 through the refrigeration compartment discharge air passage 10. The cold air sent into the refrigerator compartment 2 returns directly to the cooler compartment 5 from the refrigerator compartment return port 14 through the refrigerator compartment return air passage 11. On the other hand, the cool air sent to the vegetable compartment 4 is branched in the middle of the refrigerator compartment discharge air passage 10, passes through the vegetable compartment discharge air passage 15 provided on the opposite side of the refrigerator compartment return air passage 11, and passes through the vegetable compartment 4. Sent to The cool air sent to the vegetable room 4 returns to the cooler room 5 through the vegetable room return air passage 12 from the vegetable room return port 16. Further, in the above configuration, since the warm and humid air from the refrigerator compartment 2 passes through the inside of the return compartment 11 for the refrigerator compartment, the heat insulating partition insulated between the cooler compartment 5 and the return compartment 11 for the refrigerator compartment. 17. A temperature compensating heater 22 is provided on the outer periphery of the refrigerator compartment return air passage 11.
[0006]
[Problems to be solved by the invention]
However, in the above configuration, since the temperature compensating heater 22 is provided on the outer periphery of the refrigerating room return air passage 11 arranged beside the cooler room 5, the power consumption increases, and There was a problem that the cost was high.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a refrigerator capable of suppressing the amount of power consumption and ensuring the reliability of a return air passage for a refrigerator at low cost.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a refrigerator compartment, a freezer compartment, and a vegetable compartment in order from the top, inside a heat insulating box, a cooler for cooling each of these compartments, and a portion below the cooler. A defrosting duct heater arranged in the refrigerator, a fan device for forcibly circulating the cool air cooled by the cooler, a discharge passage for a refrigerator, which guides the cool air to the refrigerator, and a cooling device for cooling the cool air sent to the refrigerator. A return air passage for the refrigerator compartment vertically arranged on the side of the cooler for returning to the cooler, a heat insulating partition that insulates the return air passage for the refrigerator compartment and the cooler, and the defrost duct heater It extends to the projection plane of the opening of the return air passage for the refrigerator compartment . Further, a heat insulating portion between the cooler and the return air passage for the refrigerator is provided in the cooler room cover.
[0009]
Thereby, at the time of defrosting, the frost in the return air passage for the refrigerator compartment is melted by the heat of the defrosting duct heater, reliability can be ensured, and the power consumption can be reduced at low cost. In addition, by providing the heat insulating portion between the cooler and the return air passage for the refrigerator in the cooler room cover, by attaching and detaching the cooler room cover, the defrost duct heater can be easily attached and detached, and the serviceability can be improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is characterized in that a refrigerator compartment, a freezer compartment, and a vegetable compartment are partitioned in this order from the top inside a heat insulating box, and a cooler for cooling each of these compartments and a cooler for the cooler are provided. A defrosting duct heater arranged below, a fan device for forcibly circulating the cool air cooled by the cooler, a discharge air passage for a cool room for guiding cool air to the cool room, and the cool air sent to the cool room. A defrost duct heater having a refrigerating compartment return air passage vertically arranged on the side of the refrigerating machine to return to the cooler, and a heat insulating partition for insulating the refrigerating compartment return air passage and the cooler; The refrigerator is characterized by extending to the projection surface of the opening of the return air passage for the refrigerator compartment, and ensures the reliability by melting the frost in the return air passage for the refrigerator compartment by the heat of the defrost duct heater when defrosting. And has the effect of reducing power consumption at low cost.
[0011]
According to a second aspect of the present invention, there is provided the refrigerator according to the first aspect, wherein a heat insulating portion between the return air passage for the refrigerator compartment and the cooler compartment is provided in the cooler compartment cover. By providing the heat insulating portion between the cooler and the return air passage for the refrigerator compartment in the equipment room cover, the cooler room cover can be attached and detached, the attachment and detachment of the defrost duct heater can be easily performed, and the serviceability can be improved. .
[0012]
【Example】
An embodiment of the present invention will be described below with reference to FIGS. In order to avoid repetition of the description, the same parts as those of the conventional example will be denoted by the same reference numerals.
[0013]
(Example 1)
1, 2, 3, and 4, reference numeral 18 denotes a defrost duct heater which is disposed below the cooler 6 and is disposed up to the inside of the return air passage 11 for the refrigerator compartment.
[0014]
In the refrigerator configured as described above, during the cooling operation of the refrigerator, when the warm and humid air from the refrigerator compartment 2 passes through the return compartment 11 for the refrigerator compartment, Frost on the surface. At the time of defrosting, the defrosting duct heater 18 is energized, and the hot air of the defrosting duct heater 18 can melt the frost in the refrigerating compartment return air passage 11, thereby ensuring the reliability of the refrigerating compartment return air passage 11.
[0015]
(Example 2)
5 and 6 show a second embodiment according to the present invention. Reference numeral 19 denotes a cooler room cover which insulates the freezing room 3 and the cooler room 5 from each other. The cooler room cover 19 has a heat insulating portion 20 between the cooler 6 and the return air passage 11 for the refrigerator.
[0016]
In the refrigerator configured as described above, at the time of defrosting, the defrosting duct heater 18 is energized, and the hot air of the defrosting duct heater 18 can melt the frost in the refrigerating compartment return air passage 11 so that the return air for the refrigerating compartment can be melted. The reliability of the road 11 can be secured. Further, by attaching and detaching the cooler room cover 19, the defrost duct heater 18 can be easily replaced.
[0017]
【The invention's effect】
As described above, the present invention divides a refrigerator compartment, a freezer compartment, and a vegetable compartment in this order from the top inside the heat insulation box, and arranges a cooler for cooling each of these compartments and a portion below the cooler. A defrosting duct heater, a fan device for forcibly circulating the cool air cooled by the cooler, a discharge passage for the cool room for guiding the cool air to the cool room, and returning the cool air sent to the cool room to the cooler. For the refrigerator compartment, which is vertically arranged on the side of the cooler, and a heat insulating partition that insulates the cooler return air passage and the cooler, and the defrost duct heater is used for the refrigerator compartment. By extending to the projection surface of the opening of the return air passage, the frost in the return air passage for the refrigerator compartment can be melted by the heat of the defrost heater during defrosting, and the reliability of the return air passage for the refrigerator compartment can be improved. Since the temperature can be secured and the temperature compensation heater is not required, the power consumption can be suppressed. Further, cost can be reduced.
[0018]
In addition, by providing a heat insulating portion between the cooler and the return air passage for the refrigerator in the cooler room cover, the defrost duct heater can be easily replaced by attaching and detaching the cooler room cover, thereby improving serviceability. Can be achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a refrigerator showing an air passage structure with a door removed according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the refrigerator. FIG. FIG. 4 is a cross-sectional view around the cooler of the refrigerator. FIG. 5 is a longitudinal cross-sectional view around the cooler of the refrigerator according to the second embodiment of the present invention. FIG. 7 is a perspective view of a refrigerator showing a conventional air path structure with a door removed. FIG. 8 is a cross-sectional view of the refrigerator. FIG. 9 is an air path structure of another conventional example with a door removed. FIG. 10 is a perspective view of the refrigerator shown. FIG. 10 is a cross-sectional view of the refrigerator. FIG. 11 is a vertical cross-sectional view of the refrigerator around the refrigerator. FIG. 12 is a cross-sectional view of the refrigerator around the refrigerator.
REFERENCE SIGNS LIST 1 Insulated box 2 Refrigerating room 3 Freezer room 4 Vegetable room 6 Cooler 7 Fan device 10 Refrigerating room discharge air passage 11 Refrigerating room return air passage 17 Insulating partition 18 Defrost duct heater 19 Cooler room cover 20 Heat insulating unit 21 Excluding Frost heater 22 Heater for temperature compensation

Claims (2)

Inside the heat insulating box, a refrigerator compartment, a freezing compartment, and a vegetable compartment are partitioned in this order from the top, and a cooler for cooling each of these compartments, a defrost duct heater disposed below the cooler, and the cooler A fan device for forcibly circulating the cool air cooled by the cooler, a discharge air passage for the cooler that guides the cool air to the cooler, and a vertical cooler side to return the cool air sent to the cooler to the cooler. A return air passage for the refrigerator compartment arranged in the direction, a heat insulating partition that insulates the return air passage for the refrigerator compartment and the cooler, and the defrost duct heater projects the opening of the return air passage for the refrigerator compartment. Refrigerator characterized by being extended to the surface . The refrigerator according to claim 1, wherein a heat insulating portion between the return air passage for the refrigerator compartment and the cooler room is provided in the cooler room cover.

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