JPH0827123B2 - refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a two-temperature refrigerator in which a main body is composed of a heat insulating wall, an upper part is a freezer compartment, and a lower part is a refrigerating compartment.

(B) Conventional technology One compressor and one cooler are installed, the cooler is arranged in the cooling chamber at the upper part of the main body, and cold air is sent from this cooling chamber to the freezing chamber below the freezing chamber. After forming a circulating cold air that returns to the cooling chamber, the freezing chamber is first cooled, and then the cooling chamber provided below the freezing chamber via the partition plate is cooled. A refrigerator, which is separately provided and introduces the chilled air from the freezing room into the refrigerating room by means of a refrigerating discharge duct and a refrigerating suction duct that communicate the freezing room and the refrigerating room, as shown in Japanese Utility Model Publication No. 60-9663. Seen in the past.

(C) Problems to be Solved by the Invention However, in the conventional refrigerator shown in the above publication, the effective internal volume of the freezing chamber is inevitably reduced due to the presence of the refrigerating discharge and the suction duct. Moreover, the complicated work of incorporating two ducts was forced, and the assembly was difficult.

Furthermore, the size of the net shelves installed in the freezer and the net shelves installed in the refrigerating room are different and will be prepared separately for each.
There are drawbacks such as a large number of parts and high cost.

The present invention has been made in view of the above points, and secures a wide effective internal volume in the freezing chamber, facilitates the duct mounting process, and further commonly uses parts, such as manufacturing, structural aspects and usability aspects. It is an object of the present invention to provide a refrigerator that is further improved.

(D) Means for Solving the Problems In order to achieve the above object, the present invention divides a storage chamber in a main body constituted by a heat insulating wall into upper and lower parts, a upper part is a freezing room, and a lower part is a refrigerating room. Above the chamber, there is a cooling air discharge port to the freezing chamber and a cooling air suction port from the freezing chamber, a cooling chamber accommodating a cooler and a freezing chamber cold air circulation fan is provided inside, and cooling air returning to the cooling chamber is provided. Among them, a part of the cold air near the cold air suction port is guided to the refrigerating room by a cold air circulation fan arranged in the refrigerating room, and the cold air in the refrigerating room is returned to the cooling room from the vicinity of the cold air suction port. In a refrigerator including a refrigerating suction duct, the refrigerating discharge duct and the refrigerating suction duct have a positional relationship in which a cold air inlet and a cold air outlet thereof face each other with the freezing compartment cold air circulating fan in between. Left and right with the opening to the cooling chamber It is embedded in the heat insulation side wall of.

(E) Action The refrigerating discharge duct for guiding a part of the cool air circulating between the cooling chamber and the freezing chamber to the refrigerating chamber and the refrigerating suction duct for returning the cool air of the refrigerating chamber to the cooling chamber It is arranged so as to be embedded in the left and right heat-insulating side walls. As a result, both ducts do not exist in the freezing compartment, and the effective internal volume of the freezing compartment can be maintained high. Moreover, since the cold air inlet of the refrigerating discharge duct and the cold air outlet of the refrigerating suction duct are opened to face each other with the freezing compartment cold air circulation fan in between, the discharge pressure and Since the pressure difference from the suction pressure is small and the duct internal pressure is almost the same, the cool air can be stably supplied to the refrigerating chamber, and the temperature control can be reliably performed. Further, the duct can be embedded in the step of manufacturing the heat insulating side wall of the main body by foaming and filling the heat insulating material, which can greatly simplify the work of mounting the duct.

It will be possible to commonly use the net rack put in the freezer room and the refrigerator room.

(C) Example An example of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, 1 is a heat insulating wall 2 having a front opening.
In a refrigerator having a main body, the inside of the refrigerator is, for example, a heat insulating partition plate 3 formed integrally with a heat insulating wall 2, and a freezer compartment 4 is provided at the top.
A refrigerating compartment 5 is defined in the lower part, and heat insulating doors 6, 6 capable of opening and closing the front openings of both compartments are pivotally attached to the main body. A cooling chamber 7 is formed above the freezing chamber 4,
Inside the cooling chamber 7, a cooler 8 and a freezing chamber cold air circulation fan 9 which is rotationally driven by a motor 9a are arranged. Ten
Is a heat insulating plate on which a condensing unit such as a compressor 11, a condenser 12, and an air-cooling blower 13 is installed on the upper surface, and the cooler 8 and the freezing room cold air circulation fan 9 are attached and supported on the back surface. It is attached so as to close the rectangular opening formed in 14. These condensing units are made invisible from the outside by a cover body 16 arranged so as to surround the upper surface of the main body upper wall 14. Reference numeral 17 denotes the main body upper wall 14 corresponding to the heat insulating plate 10 so as to hide the freezer compartment cool air circulation fan 9 and the cooler 8 from below.
With a cooler cover that is attached and fixed to the
The space formed by the cooler cover 17 and the heat insulating plate 10 serves as the cooling chamber 7. Further, the cooler cover 17 has a bottom surface inclined to one side, and a circular hole facing the freezing room cold air circulation fan 9 is formed on this bottom surface to form a freezing room cold air suction port 19 and The rear end of the bottom surface is partially cut away to serve as the freezing room cool air discharge port 20. Therefore, the cooling chamber 7 and the freezing chamber 4 communicate with each other through the suction port 19 and the discharge port 20. Further, a drain pan 21 is arranged on the inner surface side of the cooler cover 17 so as to receive defrosting water from the cooler 8 at the time of defrosting and drain it to the outside of the main body through the drainage channel 22a and the drainage hose 22b. ing.

By the way, when the cooling operation is performed and the freezing room cooling air circulation fan 9 is driven, in the freezing room 4, the freezing room air is introduced from the freezing room 4 into the cooling room 7 by the suction port 19
Is sucked in through the cooling device 8 and heat-exchanged in the cooler 8 to become cold air, which is discharged from the discharge port 20 into the freezing chamber 4 and circulates in the freezing chamber 4, and again through the suction port 19. As a result, a circulation flow shown by an arrow A in FIG. 3 that returns from the freezing chamber 4 to the cooling chamber 7 is formed to cool the inside of the freezing chamber 4. Reference numeral 25 is a refrigerating discharge duct for guiding a part of the cool air near the suction port 19 to the refrigerating compartment 5 by a refrigerating compartment cold air circulating fan (described later). Reference numeral 26 denotes a refrigerating suction duct that sucks in the cool air after circulating the inside of the refrigerating chamber 5 uniformly by the refrigerating cool air circulating fan and returning it to the cooling chamber 7. The refrigerating discharge duct 25 and the refrigerating suction duct 26 are in a positional relationship of being opposed to each other. The refrigerating discharge duct 25 and the refrigerating suction duct 26 are embedded in the left and right heat insulating side walls 2A, 2B constituting the freezer compartment 4, as shown in FIG. Thus, the refrigerating discharge duct
25 and the refrigeration suction duct 26 between the left and right heat insulating side walls 2A, 2B
By embedding it inside, the duct does not exist in the freezer compartment 4,
The inside of the freezer compartment 4 can be used as a storage unit, a high effective internal volume is ensured, and it does not decrease unlike the conventional case. And both the refrigerating discharge duct 25 and the refrigerating suction duct 26,
The upper end has bent portions 25a and 26a which are bent at a right angle toward the cooling chamber 7 and extend horizontally. An end port of the bent portion 25a serves as a cold air inlet 27 into the refrigerating chamber 5 and one bent portion The end of 26a serves as a cold air outlet 28 for discharging the cold air from the refrigerating chamber 5 into the cooling chamber 7 so as to join the freezing chamber cold air. Further, naturally, the lower end end of the refrigerating discharge duct 25 becomes the introduced cool air discharge port 29, and the lower end end of the refrigerating suction duct 26 connects the refrigerating room cool air to the refrigerating suction duct 26. It becomes a suction port 30 for returning to the cooling chamber 7 via the above. Reference numeral 31 is a damper device that is installed close to the discharge port 29 and is opposed to the refrigerating chamber 5 side, and controls the discharge port 29 to an open or closed state to control the amount of cold air sent into the refrigerating chamber 5. For example, the damper 32 uses an electric type that is opened and closed by a motor 33, and the damper device may be a mechanical type. The damper device 31 controls the intake of cold air into the refrigerating chamber 5, but the damper device 31 is not always necessary for taking in the cool air, and rather, the cold air circulating fan for the refrigerating chamber described below is used. Its cold air intake action is mainly performed. Reference numeral 34 is a cold air circulation fan for the refrigerating room, and the damper device 31
And the refrigerating discharge duct 25 and the refrigerating suction duct 26 are arranged so as to be close to each other in position. The damper device 31 and the refrigerating compartment cold air circulation fan 34 are housed and installed in an intake / exhaust box 35 mounted on the inner surface of one side wall of the refrigerating compartment 5. Also, the refrigerating room cold air circulation fan 34
Correspondingly, the circular hole provided in the intake / exhaust box 35 serves as an outlet for cold air in the refrigerating compartment, and the outlet is covered with a fan guard 37.

Therefore, when the cooling operation is performed and the freezing room cold air circulation fan 9 and the refrigerating room cold air circulation fan 34 are driven, the suction is performed by the freezing room cold air circulation fan 9 as indicated by arrows B in FIG. A part of the cool air sucked from the freezer compartment 4 to the cooling compartment 7 through the mouth 19 is forcibly sucked by the refrigerating compartment cool air circulating fan 34 through the refrigerating discharge duct 25, and then opened. From the damper 32, which is present, enters the space inside the suction / exhaust box 35, is bent in a lateral direction, and is widely blown into the refrigerating chamber 5 by the refrigerating cold air circulation fan 34. The cold air in the refrigerating chamber 5 which circulates uniformly in the refrigerating chamber 5 flows upward by the freezing chamber cold air circulating fan 9 into the cooling chamber 7 and merges with the refrigerating chamber cold air (shown by an arrow A). After passing through the cooler 8, it is cooled again and fed into the freezing compartment 4, and after circulating through the freezing compartment 4, it again enters the cooling compartment 7 through the suction port 19 or a part thereof The circulation flow is introduced into the refrigerating discharge duct 25, and the inside of the refrigerating chamber 5 is cooled to a temperature suitable for refrigerating. By controlling the opening and closing of the damper 32 by a temperature sensor (not shown) provided in the refrigerating compartment 5 to adjust the amount of cold air sent into the refrigerating compartment 5, it is possible to control to a predetermined refrigerating temperature. Further, 38 and 39 are mesh shelves provided in the freezer compartment 4 and the refrigerating compartment 5, respectively, and the mesh shelves are arranged in a plurality of upper and lower stages with their mounting positions adjustable. The net rack 38 in the freezing compartment and the net rack 39 in the refrigerating compartment are of the same size and can be commonly used.

Next, a method of burying the refrigerating discharge duct 25 and the refrigerating suction duct 26 in the heat insulating side walls 2A, 2B will be described with reference to FIGS. 5 and 6.

The refrigerating discharge duct formed by processing an aluminum plate
Reference numeral 25 (the same applies to the refrigerating suction duct 26, so the refrigerating discharge duct 25 will be described as a representative) to form an outer box 40 serving as an outer wall of the refrigerator body, the freezer compartment 4, and the refrigerating compartment 5, respectively. It is arranged between the cooling inner box 47 and the refrigerating inner box 49, and the heat insulating material 42 is foam-filled between the inner and outer boxes to be embedded in the heat insulating side walls 2A, 2B. Therefore, the refrigerating discharge duct 25 is attached in advance to the freezer inner box 47 and the refrigerating compartment box 49 side. That is, in the refrigerating discharge duct 25, the portion of the cold air introducing port 27 at the upper end thereof is inserted into the opening 44 of the unit breaker 43 so as to be slightly projected from the opening 44, and the cold air introducing port 27 part. Flanges 45 protruding from both ends of
The unit breaker 43 is attached and fixed to the unit 45 with the vis 46, 46, and the unit breaker 43 itself is fixed to the freezer compartment box 47 by the appropriate attaching means with its lower side portion 43a. On the other hand, in the discharge port 29 portion at the lower end of the refrigerating discharge duct, an opening 48 having the same size as the discharge port 29 is provided.
The discharge port 29 is applied to one side surface of the refrigerating chamber box 49 in which the above is formed. The abutting pieces 50 and 50 are formed to extend to the upper and lower edges of the discharge port 29. Then, a duct opening 51 made of synthetic resin is inserted from the opposite side of the opening 48, and a side peripheral wall portion thereof is formed.
The 51a is fitted into the discharge port 29 of the refrigerating discharge duct 25. At this time, the two claws 53, 53 provided respectively on the upper and lower surfaces of the side peripheral wall portion 51a are caught on the back side edge of the opening 48 as shown in FIG. ing. And finally, the refrigerating discharge duct 25
The mounting screws 54, 54 are fastened and fixed to the mounting bosses 55, 55 of the refrigerating compartment box 49 from the back side of the. Thus, the upper end of the refrigerating discharge duct 25 is fixedly attached to the freezing compartment box 47 via the unit breaker 43, while the lower end of the refrigerating discharge duct is connected to the refrigerating compartment box 49 via the duct port 51. As a result of being attached and fixed, the refrigerating discharge duct 25 is preliminarily attached to each of the inner boxes. Then, the inner boxes to which the refrigerating discharge duct 25 is attached are arranged in the outer box 40. At this time, the upper side portion 43a of the unit breaker 43 is fixed to the outer box 40 by an appropriate attaching means. After such setting, the outer box 4
0, the space between the inner boxes 47, 49 and the refrigerating discharge duct 25 is foam-filled with the heat insulating material 42, so that the refrigerating discharge duct 25 is embedded in the heat insulating side wall 2A.

(G) Effects of the Invention As described above, according to the present invention, the main body is constituted by the heat insulating wall, and the inside of the refrigerator is formed by the partition plate to form the freezing chamber in the upper part and the refrigerating chamber in the lower part. Cooling is carried out by circulating cool air by a cooler and a freezing room cold air circulation fan arranged in a cooling chamber provided above it, while a refrigeration room cold air circulation fan is also arranged in the refrigeration room to cool the refrigeration room. A refrigerating discharge duct for guiding a part of the cold air circulating between the freezing chamber and the cooling chamber to the refrigerating chamber by the refrigerating chamber cold air circulation fan; and a refrigerating suction duct for returning the cold air in the refrigerating chamber to the cooling chamber. Is embedded in the heat-insulating side wall of the main body, so that the freezer compartment can be used more widely and the effective internal volume is improved compared to the conventional one in which both ducts are arranged in the freezer compartment.

Further, since the refrigerating discharge duct and the refrigerating suction duct are arranged such that the cold air introducing port and the cold air introducing port face each other with the freezing room cold air circulation fan in between, the cold air introducing pressure to the refrigerating room and the refrigerating room The cold air discharge pressure from the cooling chamber to the cooling chamber becomes almost the same pressure, and the cold air smoothly circulates between the cooling chamber and the refrigerating chamber via the refrigerating discharge duct and the refrigerating suction duct to control the temperature of the refrigerating chamber. You will be able to do it reliably.

Since both ducts can be embedded together in the side wall during the process of foaming and filling the side wall with the heat insulating material, the installation work of the duct in the freezing room in the assembly process as in the past is unnecessary, and the duct device to the main body is extremely difficult. Easy to do

Further, the freezing compartment and the refrigerating compartment can be made to have the same planar size, and the net racks installed there can be commonly used, so that many effects can be expected such as reduction of the number of parts and cost reduction.

[Brief description of drawings]

FIG. 1 is an external perspective view of the refrigerator of the present invention, FIG. 2 is a vertical cross-sectional view taken along the line XX of FIG. 1, and FIG. 3 is a perspective view of a main part of the refrigerator of the present invention showing the circulation of cold air, and FIG. Is a vertical cross-sectional view taken along the line YY of FIG. 3, FIG. 5 is a cross-sectional view of a refrigerating compartment discharge duct or a refrigerating compartment suction duct, and a main part of a heat insulating side wall embedded therein, and FIG.
It is an exploded perspective view of the main components in the figure. 2 ... Insulation wall, 2A, 2B ... Insulation side wall, 3 ... Insulation partition plate, 4 ... Freezer compartment, 5 ... Refrigerator compartment, 7 ... Cooling compartment, 8 ...
… Cooler, 9 …… Cooling air circulation fan for freezer, 10 …… Insulation plate, 19 …… Suction port, 20 …… Cooling air outlet for freezing room, 25 ……
Refrigerating discharge duct, 26 ... Refrigerating suction duct, 34 ... Refrigerating room cold air circulation fan.

Claims (1)

[Claims] 1. A storage chamber in a main body constituted by a heat insulating wall is divided into upper and lower parts, an upper part is a freezing room and a lower part is a refrigerating room. Above the freezing room, a cold air discharge port to the freezing room and a freezing room are provided. A cooling chamber having a cooler and a freezing room cold air circulation fan is provided inside, and a part of the cold air in the vicinity of the cold air suction port among the cool air returning to the cooling chamber is stored in the refrigerating chamber. In a refrigerator including a refrigerating discharge duct that guides the refrigerating chamber to a refrigerating chamber by a refrigerating chamber cold air circulating fan, and a refrigerating suction duct that returns the cool air in the refrigerating chamber from the vicinity of the cool air suction port to the cooling chamber, the refrigerating discharge duct and The refrigeration suction duct is provided in the left and right adiabatic side walls in a state in which the cold air inlet and the cold air outlet are open to the cooling chamber so as to have a positional relationship of facing each other with the freezing chamber cold air circulation fan in between. A refrigerator characterized by being buried.