JP2532996B2 - Freezer refrigerator - Google Patents

Description

The present invention relates to a refrigerator having a freezer compartment and a refrigerating compartment partitioned by a partition wall, wherein both compartments are cooled by one cooling unit. It is.

(B) Conventional Technology As a prior art of the present invention, for example, in Japanese Patent Laid-Open No. 63-129283, a partition wall divides the interior into a freezer compartment in which a cooling unit is arranged and a refrigerating compartment. A freezer-refrigerator comprising a cold air circulation system that forms communication passages that communicate the chambers above and below, respectively, and forms a cold air circulation system that circulates a portion of the cold air that has been heat-exchanged by the cooler of the cooling unit to the refrigerating chamber. A hollow return duct that is open, a duct heater that is arranged on the outer surface of the duct to heat the duct, a heat insulating material that covers the heater, a duct cover that covers the heat insulating material, and a inside of the duct. And a return air heater that is attached to the support plate and heats the return cool air that passes through the duct. The duct cover is screwed on the wall surface of the freezer compartment to open one end of the duct. The lower part There is disclosed a refrigerator having a communication passage and an opening at the other end facing a cold air inlet of the cooling unit.

(C) Problems to be Solved by the Invention According to such a conventional refrigerator-freezer,
Since the cooling unit and the return duct are provided, there is a problem that the effective volume in the refrigerator decreases.

Further, since the return duct passes through the freezing compartment, it is necessary to have a large capacity for the duct heater and the return air heater for preventing the frost formation of the moist air in the duct, which is uneconomical and inefficient.

In addition, since it is necessary to give priority to prevention of frost formation in the duct, the surface temperature of the duct becomes high, and there is a problem that the temperature of the freezing compartment rises due to this effect.

In view of such problems of the prior art, the present invention increases the effective volume of the freezing compartment, reduces the heater capacity for preventing frost formation in the duct, and further reduces the temperature effect on the freezing compartment. A freezer-refrigerator intended to be lost.

(D) Means for Solving the Problems In order to achieve the above object, the present invention divides the inside of a heat-insulating box by a partition wall into a refrigerator and a freezer compartment having an opening on one side, and the opening is provided. A cooler and a cold air circulation fan are housed in a cooling box that defines a heat exchange chamber communicating with the freezing chamber via a discharge port for supplying discharge cold air to the freezing chamber at an upper portion of the freezing chamber. A discharge duct is provided for guiding a part of the discharged cool air to the refrigerating chamber through a passage formed in the partition wall, and the refrigerating chamber and the heat exchange chamber are provided in the heat insulating back wall of the heat insulating box. A refrigerating / refrigerating machine is constructed by burying a return duct communicating with each other and a heater for heating return cold air.

(E) Operation According to the present invention, since the cooler, the cool air circulation fan, and the return duct are not provided in the freezing compartment, the effective volume of the freezing compartment is increased.

Also, since the return duct is buried in the heat insulating back wall, the return cold air from the refrigerator compartment does not decrease due to the temperature effect of the freezer compartment, so that the capacity of the heater can be reduced, In addition, it is possible to prevent the temperature of the freezing compartment from rising due to the heat of the heater.

(F) Example An example of the present invention will be described below with reference to FIGS. 1 to 5. The drawings are all related to the refrigerator-freezer of the present invention. Fig. 1 is a cross-sectional plan view, Fig. 2 is a perspective view with some doors opened, Fig. 3 is a vertical sectional front view, and Fig. 4 is A in Fig. 3. -A sectional view, FIG. 5 is a perspective view showing the structure of the duct and related parts, and 1 is a foam insulation such as polyurethane filled in the space between the inner box 2 and the outer box 3 and both boxes 2, 3. In the heat-insulating box body constituted by the material 4, a right-side refrigerating chamber 6 and a left-side freezing chamber 8 having an opening 7 on one side are defined by a heat-insulating partition wall 5 in the box body 1. These refrigerator compartment 6 and freezer compartment 8
A heat insulating door 9 is provided on the front surface of the. 10 is a plate fin type cooler 11 and a cool air circulation fan above it.
A cooling box body having a side opening defining a heat exchange chamber 13 accommodating a cooling unit such as 12; the heat insulation box body 1 and the cooling box body 10 are connected so that the freezing chamber 8 and the heat exchange chamber 13 communicate with each other. Has been done. 14
Is a machine room juxtaposed with the heat insulating box 1, and inside the machine room 14 is a condensing unit 15 connected to the cooler 11.
And, the cooling box body 10 is housed above it, and a machine room door 16 that can be opened and closed is provided on the front surface.

Thus, a cooler is provided on the upper portion of the freezer compartment 8 along the ceiling wall.
A plurality of outlets 17 for supplying the discharge cold air, which is heat-exchanged at 11 and is blown out from the opening 7 by the cool air circulation fan 12 to the freezing chamber 8, is formed on the lower surface, and a part of the discharge cool air is divided by the partition. A discharge duct 20 having a refrigerating duct 19 leading to the refrigerating chamber 6 via a passage 18 formed in the upper portion of the wall 5 is provided. A suction duct 22 having a plurality of suction ports 21 for returning cooled air to the heat exchange chamber 13 is provided on a side portion of the freezing room 8.

Further, a return duct 23 that communicates between the refrigerator compartment 6 and the heat exchange chamber 13 and a duct heater 24 that heats the return cold air are embedded in the heat insulating back wall of the heat insulating box 1. More specifically, the suction side opening 23A of the return duct 23 faces the refrigerator compartment 6 from the rear wall of the refrigerator compartment 6, and the discharge side opening 23B of the duct 23 is inside the opening 7 formed on one side of the freezer compartment 8. Is facing. And
A duct heater 24, which is formed by bonding a meandering heater to an aluminum sheet, is arranged so as to surround the duct 23. Reference numerals 25 and 26 denote sealing materials for preventing leakage of the foamed heat insulating material 4 such as polyurethane. Further, 27 is a heat insulating material such as foamed polyethylene which is previously arranged in the space between the return duct 23 and the inner box 2. Since the heat insulating material 27 has a narrow interval, the foaming undiluted solution may not rotate, and is effective in preventing this. Reference numeral 28 denotes a damper device which is provided opposite to the refrigerating room 6 of the passage 18 and adjusts the amount of cool air sent into the refrigerating room 6.

In the above configuration, the cold air that has undergone heat exchange in the cooler 11 is sent to the discharge duct 20 by the circulation fan 12,
After being blown out from the discharge port 17 into the freezing room 8 to cool the non-cooled material (not shown), the suction duct 21 is drawn through the suction port 21.
After returning to the heat exchange chamber through 22, the circulation operation in which the heat is exchanged in the cooler 11 is repeated.

On the other hand, a part of the cool air that has been heat-exchanged in the cooler 11 is guided to the passage 18 through the refrigerating duct 19 and blown into the refrigerating chamber 6 to cool an uncooled object (not shown), The circulation operation in which the air is sucked from the suction side opening 23A, returns to the heat exchange chamber 13 from the discharge side opening 23B through the return duct 23, and heat is exchanged again in the cooler 11 is repeated.

At this time, since the cold air passing through the return duct 23 is warmed by the duct heater 24, it is possible to reliably prevent frost formation in the duct 23, and moreover, since the return duct 23 is embedded in the heat insulating back wall. In addition, the cold air can be efficiently heated by the duct heater 24 having a small capacity without being affected by the temperature of the freezer compartment 8.

(G) Effect of the Invention As described above, according to the present invention, since the cooler, the cool air circulation fan, and the return duct are not provided in the freezing compartment, the effective volume of the freezing compartment is increased.

In addition, since the return duct is buried in the heat insulating back wall, the return cold air from the refrigerator compartment does not decrease due to the temperature effect of the freezer compartment.
Frost formation in the duct can be reliably prevented. In addition, it is possible to prevent the temperature of the freezing compartment from rising due to the heat of the heater.

[Brief description of drawings]

All drawings relate to an embodiment of the refrigerator of the present invention,
FIG. 1 is a cross-sectional plan view, FIG. 2 is a perspective view in which a door is partially opened, FIG. 3 is a vertical front view, FIG. 4 is a sectional view taken along line AA of FIG. 3, and FIG. It is a perspective view which shows the structure of components. 1 ... heat insulation box, 5 ... partition wall, 6 ... refrigerator compartment, 7 ...
… Opening part, 8 …… Freezer, 13 …… Cooling box, 11 …… Cooler, 12 …… Cold air circulation fan, 13 …… Heat exchange room, 17 …… Discharge port, 18 …… Passage, 20… … Discharge duct, 23 …… Return duct, 24 …… Duct heater.

Claims (1)

(57) [Claims] 1. A heat insulating chamber is defined by a partition wall into a refrigerating chamber and a freezing chamber having an opening on one side, and a heat exchange chamber communicating with the freezing chamber through the opening. A cooler and a cool air circulation fan are housed in the cooling box body, and a discharge port for supplying discharge cold air to the freezing chamber is provided at the upper part of the freezing room and a passage formed by forming a part of the discharge cold air on the partition wall. A discharge duct that leads to the refrigerating chamber through is disposed, and a return duct that connects the refrigerating chamber and the heat exchange chamber and a heater that heats the return cold air are embedded in the heat insulating back wall of the heat insulating box. Refrigerator and refrigerator characterized by.