JPH0454872B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention is characterized in that the interior of the refrigerator is divided into two left and right compartments by a partition wall, one of which is a freezer compartment equipped with a cooling unit, and the other is a refrigerator compartment. An upper communication passage and a lower communication passage are formed above and below the partition wall to communicate the two chambers, and a cold air circulation system circulates the cold air that has been heat exchanged in the cooler to the freezer compartment and the refrigerator compartment using a cold air circulation fan. This invention relates to a refrigerator-freezer comprising:

(B) Conventional technology For example, in Japanese Patent Publication No. 58-51180, a conventional refrigerator-freezer of this type has a partition wall inside the refrigerator to partition the freezer compartment and the refrigerator compartment on the left and right. A cooler, a freezer fan, and a cooler cover are provided on the back of the chamber to form a cooling chamber with an upper part as a discharge port and a lower part as a suction port, and a side passage is provided along the side surface of the freezer compartment of the partition wall. A cover is provided, and a side path is formed through which part of the cold air that exchanges heat with the cooler and is blown out into the freezer compartment and passes through the freezer compartment in the vertical direction, and the opening on the refrigerator compartment side is located at a higher position than the opening on the freezer compartment side. A discharge duct is located at the bottom of the duct that guides some of the cold air passing through the side passage into the refrigerator compartment, and the opening on the refrigerator compartment side is located higher than the opening on the freezer compartment side, and the cold air from the refrigerator compartment is directed to the freezer compartment. A suction duct for guiding the refrigerator is formed in the partition wall, and a refrigerator compartment fan operated by a refrigerator compartment thermostat and a fan case surrounding the fan are provided on the refrigerator compartment side of the discharge duct. A refrigerator is disclosed.

(C) Problems to be Solved by the Invention The conventional refrigerator has a problem in that the cold air returned from the suction duct is diffused into the freezer compartment and mixed with the cold air in the freezer compartment, causing temperature unevenness in the freezer compartment. It was hot.

In addition, because the relationship between the discharge port and the discharge duct and the relationship between the suction port and the suction duct are both located at right angles, cold air cannot be circulated stably to the refrigerator compartment.
Particularly, unless a refrigerator fan is provided, it becomes impossible to supply almost any cold air to the refrigerator compartment.

(d) Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention divides the inside of the refrigerator into two left and right chambers by a partition wall.
One side is a freezer compartment with a cooling unit installed, and the other is a refrigerator compartment, and an upper and a lower communicating passage are formed above and below the partition wall to communicate the two chambers, and heat is exchanged with the cooler of the cooling unit. In a refrigerator-freezer comprising a cold air circulation system that circulates cold air to a freezer compartment and a refrigerator compartment by a cold air circulation fan, the opening is covered by a removable front cover having an upper discharge port and a lower suction port. In the case
The cooling unit that accommodates the cooler and the cold air circulation fan is disposed on the side wall of the freezer compartment facing the partition wall, and between the discharge port and the upper communication passage, one end opening is connected to the discharge port. A cold air supply duct is disposed which faces each other with a small distance from the other end and has an opening at the other end communicating with the upper communication passage, and between the suction port and the lower communication passage, one end opening communicates with the lower communication passage. This refrigerator-freezer is provided with a return duct which communicates with the return duct and whose other end opening faces a part of the suction port with a small distance therebetween.

(e) Effects In the present invention, since the cooling unit 10 is disposed on the side wall portion 4A of the freezer compartment 4 facing the partition wall 3,
The discharge port 13 and the upper communication path 8 and the suction port 14 and the lower communication path 9 are in opposing relationship, and the supplied cool air is supplied to the discharge port 1.
Supply duct 2 arranged between 3 and upper communication path 8
2, the returned cold air is stably supplied to the refrigerator compartment 5 through the refrigerating compartment 5, and the returned cold air is directed to the suction port 14 without being diffused into the freezing compartment 4 through the return duct 24 disposed between the suction port 14 and the lower communication path 9. .

Also, the distance between the discharge port 13 and the inlet opening 22A of the supply duct 22 and the distance between the suction port 14 and the return duct 24
Due to the spacing between the outlet openings 24B, the front cover 15 removed from the case 16 can be easily taken out of the refrigerator, facilitating maintenance services for the cooling unit 10.

(F) Embodiment An embodiment of the present invention will be described below based on the drawings. In the figure, 1 is an under-counter type refrigerator-freezer used in the kitchen of a restaurant, etc. The interior of the main body 2 having an insulating structure has a front opening. It is partitioned into two left and right chambers by a partition wall 3 having a heat insulating structure inserted into the chamber, one of which is a freezing chamber 4 and the other a refrigerating chamber 5. The front openings of the freezer compartment 4 and the refrigerator compartment 5 are closed by a freezer compartment door 6 and a refrigerator compartment door 7, respectively. Upper communication passage 8 and lower communication passage 9 communicate with each other.
is formed. Further, a cooling unit 10 is installed along a side wall 4A of the freezer compartment 4 facing the partition wall 3.

As shown in detail in FIG. 2, the cooling unit 10 houses a plate fin type cooler 11, a cold air circulation fan 12 disposed above the cooler 11, and houses the cooler 11 and the fan 12. It mainly consists of a resin case 16 whose front opening is covered by a removable front cover 15 which has a louvered cold air outlet 13 and a louvered cold air intake 14 formed at its lower part.

On the other hand, the machine room 1 is partitioned adjacent to the freezing room 4.
7 houses an electric compressor 18 and a condenser 19, which are connected to the cooler 11 by a refrigerant pipe 21 through a passage 20 formed in the side wall 4A of the freezer compartment 4 in which the cooling unit 10 is disposed. The refrigeration system consists of

In such a configuration, the upper communication passage 8 formed in the cold air discharge port 13 of the cooling unit 10 and the partition wall 3
A cold air supply duct 22 is disposed between the cooling unit 10 and the lower communication passage 9 formed in the partition wall 3. ing. Further, on the side of the refrigerator compartment 5 of the partition wall 3, an opening/closing device 31 such as a damper/thermostat is provided which opens and closes the upper communication passage 8 based on the temperature of the refrigerator compartment 5.

Specifically, the supply duct 22 has an upper surface defined by the ceiling wall 4B of the freezing chamber 4, and is screwed onto the ceiling wall 4B so that the inlet opening 22A is connected to the discharge port 1.
The outlet opening 24B is disposed in communication with the upper communication passage 8, and faces a part of the upper part 3 with a small distance, that is, a distance that allows the cover 15 removed from the case 16 to be pulled out forward. will be established.

In addition, the detailed structure of the return duct structure 23 is
This will be explained based on the drawings and FIG. 24 is a hollow return duct with openings 24A and 24B at both ends, and is made of metal such as aluminum.A duct heater 26 attached to a thin plate 25 of aluminum foil or the like is arranged around the duct 24. The periphery of the duct 24 is covered with a heat insulating material 27 such as foamed polyethylene, and a return air heater 29 attached to a support plate 28 is arranged inside the duct 24. The support plate 28 is made of a material with good thermal conductivity such as aluminum, and has an inverted V-shape with a pair of pressing pieces 28A, 28A whose lower ends are bent outward. The pressing piece 28A expands due to its elastic action, presses the inner surface of the duct 24, and is held within the duct 24. These members are housed in a duct cover 30 that has both ends and one longitudinal side open and covers the heat insulating material 27.

The return duct structure 23 unitized as described above is attached to the rear wall of the freezer compartment 4 with screws 32, so that the inlet opening 24A of the return duct 24 is in communication with the lower communication passage 9. At the same time, the outlet opening 24B faces a part of the cold air suction port 14 with a small distance, that is, a distance that allows the cover 15 removed from the case 16 to be pulled out forward, similar to the above-mentioned distance. It is positioned as

Next, the operation of the present invention will be explained. Cooler 1
The cold air heat-exchanged in step 1 is blown out from the discharge port 13 by the circulation fan 12 and forcedly circulated to the freezer compartment 4 to cool the freezer compartment 4 to about -25°C. The air is supplied to the refrigerator compartment 5 from the upper communication path 8, and the refrigerator compartment 5 is cooled to about 5° C. by the action of the opening/closing device 31.

Therefore, the return cold air from the refrigerator compartment 5 flows into the inlet opening 24A of the return duct 24 from the lower communication passage 9, passes through the return duct 24, and flows out from the outlet opening 24B, without being diffused into the freezing compartment 4. The cold air circulation operation in which the cold air is sucked in through the suction port 14 and heat exchanged again in the cooler 11 is repeated.

Further, as shown by the dashed line X in FIG. 1, the cover 15 removed from the case 16 is
Due to the spacing between the inlet opening 22A of the supply duct 22 and the spacing between the suction port 14 and the outlet opening 24B of the return duct 24, the cooler 11 and the cold air can be pulled out forward and removed from the refrigerator. Maintenance services for the circulation fan 12 and the like can be easily performed.

(G) Effects of the Invention As described above, the present invention provides a cooling unit that is arranged on the side wall of the freezing chamber facing the partition wall, thereby connecting the discharge port of the cooling unit and the upper communication passage formed in the partition wall and the cooling unit. The suction port and the lower communication path formed in the partition wall can be positioned in a facing relationship, respectively, and further, between the discharge port and the upper communication path, the inlet opening faces the discharge port and the outlet opening faces the upper communication path. By disposing a supply duct that communicates with the inlet and a return duct between the suction port and the lower communication passage, the inlet opening communicates with the lower communication passage and the outlet opening facing the suction inlet. It is possible to stabilize the circulation, and moreover, it is possible to stably supply cold air to the refrigerator compartment using only the cold air circulation fan, and to prevent the return cold air from dispersing into the freezer compartment.
This has the extremely significant advantage of preventing temperature unevenness in the freezer compartment.

Also, depending on the positional relationship between the discharge port and the inlet opening of the supply duct, and the suction port and the outlet opening of the return duct,
Since the cover removed from the case can be easily pulled out of the refrigerator, simple problems with the cooler or cold air circulation fan can be easily resolved, which also improves maintenance serviceability. can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the refrigerator-freezer of the present invention, Fig. 2 is an exploded perspective view of the cooling unit, Fig. 3 is a partially cutaway and disassembled front perspective view, and Fig. 4 is the same as Fig. 3. 5 is an exploded perspective view of the duct structure of the present invention, and FIG. 6 is a perspective view of the main part of FIG. 1.
It is an A sectional view. 3... Partition wall, 4... Freezer compartment, 4A... Side wall, 5... Refrigerator compartment, 8... Upper communication path, 9... Lower communication path, 10 ... Cooling unit, 11... Cooler, 12 ...Cold air circulation fan, 13...Discharge port,
14...Suction port, 15...Front cover, 16...
Case, 22... Supply duct, 22A... Inlet opening, 22B... Outlet opening, 24... Return duct,
24A...Inlet opening, 24B...Outlet opening.

Claims (1)

[Claims] 1 The inside of the refrigerator is divided into two rooms, left and right, by a partition wall.
One side is a freezer compartment with a cooling unit installed, and the other is a refrigerator compartment, and an upper and a lower communicating passage are formed above and below the partition wall to communicate the two chambers, and heat is exchanged with the cooler of the cooling unit. In a refrigerator-freezer comprising a cold air circulation system that circulates cold air to a freezer compartment and a refrigerator compartment by a cold air circulation fan, the opening is covered by a removable front cover having an upper discharge port and a lower suction port. In the case
The cooling unit that accommodates the cooler and the cold air circulation fan is disposed on the side wall of the freezer compartment facing the partition wall, and between the discharge port and the upper communication passage, one end opening is connected to the discharge port. A cold air supply duct is disposed which faces each other with a small distance from the other end and has an opening at the other end communicating with the upper communication passage, and between the suction port and the lower communication passage, one end opening communicates with the lower communication passage. A refrigerator-freezer characterized by being provided with a return duct which communicates with the other end and whose opening at the other end faces a part of the suction port with a small distance therebetween.