JPH04148178A - Refrigerator - Google Patents

Abstract

PURPOSE:To secure a wide effective internal volume in a freezing chamber, facilitate the mounting process of ducts and permit common employment of parts by a method wherein a discharging duct for refrigeration and a suction duct for refrigeration are buried into left and right heat insulated side walls, constituting the main body of a refrigerator. CONSTITUTION:A discharging duct 25 for refrigeration and a suction duct 26 for refrigeration are arranged so as to be opposed and are formed so as to by buried into left and right heat insulated side walls 2A, 2B. The ducts are not existing in a freezing chamber 4 in such a manner whereby the inside of the freezing chamber 4 can be utilized as a reserving section wholly and an effective internal volume can be secured. On the other hand, the ducts can be buried in the manufacturing stage of the heat insulating side walls 2A, 2B of the main body while filling and foaming heat insulating material 42 and, therefore, the mounting work of the ducts can be simplified. Further, racks 38, 39, installed in the freezing chamber 4 and a refrigerating chamber 5 become capable of being used commonly.

Description

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

(b) Conventional technology Equipped with one compressor and one cooler, the cooler is placed in the cooling chamber at the top of the main body, and cold air is sent from this cooling chamber to the freezing chamber below. After circulating the cold air, the air returns to the cooling room to cool the freezer compartment first, and then the refrigerator compartment installed below the freezer compartment via a partition plate.
A refrigerator that was installed separately at the back of the freezer compartment and introduced circulating cold air from the freezer compartment into the refrigerator compartment through a refrigeration discharge duct and a refrigeration suction duct that communicated the freezer and refrigerator compartments.
This has been conventionally seen as shown in Japanese Patent No. 0-9663.

(c) Problems to be Solved by the Invention However, in the conventional refrigerator disclosed in the above-mentioned publication, the effective internal volume of the freezer compartment was inevitably reduced due to the presence of the refrigeration discharge and suction ducts. In addition, it was difficult to assemble, requiring the complicated work of incorporating two ducts.

Furthermore, the size of the mesh shelves installed in the freezer compartment and the mesh shelves installed in the refrigerator compartment are different, and each must be prepared separately, resulting in disadvantages such as a large number of parts and high costs.

The present invention has been made in view of the above points, and has been made in terms of manufacturing, structural aspects, and usability, such as securing a large effective internal volume in the freezing chamber, facilitating the duct installation process, and common use of parts. Our aim is to provide a refrigerator that is even better than before.

(d) Means for Solving the Problems In order to achieve the above object, the present invention divides a storage chamber in the main body configured with a heat insulating wall into upper and lower parts, with the upper part serving as a freezing compartment and the lower part serving as a refrigerating compartment. A cooling chamber is provided above the freezing chamber, which has a cold air outlet to the freezing chamber and a cold air suction port from the freezing chamber, and a cooling chamber that houses a cooler and a freezer cold air circulation fan, and cool air that returns to the cooling chamber. Some of the cold air near the cold air intake is
In the refrigerator, the refrigerator includes a refrigeration discharge duct that leads to the refrigeration room by a refrigeration room cool air circulation fan disposed in the refrigeration room, and a refrigeration suction duct that returns cold air from the refrigeration room to the cooling room from near the cold air intake port. A discharge duct and a refrigerating suction duct are embedded in the left and right heat insulating side walls of the main body.

(E) Function The refrigeration discharge duct that guides a portion of the cold air circulating between the cooling room and the freezer compartment to the refrigerator compartment, and the refrigeration suction duct that returns the cold air from the refrigerator compartment to the cooling room are the following: It is embedded in the left and right heat insulating side walls. As a result, both ducts are not present in the freezer compartment, and the effective internal volume of the freezer compartment can be maintained at a high level. The duct can be embedded at the stage of manufacturing the heat insulating side walls of the main body by foam-filling the heat insulating material, which greatly simplifies the work of installing the duct.

It will now be possible to share the use of mesh shelves in the freezer and refrigerator compartments.

(f) Example Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In FIGS. 1 and 2, 1 is a refrigerator whose main body is composed of a heat insulating wall 2 with an open front.
A freezer compartment 4. A refrigerating compartment 5 is defined in the lower part, and a heat insulating door 6.6 which can open and close the front opening of the compartment is pivotally attached to the main body.

A cooling chamber 7 is formed above the freezing chamber 4, and a cooler 8 and a cooling chamber cold air circulation fan 9 rotationally driven by a motor 9a are disposed within the cooling chamber 7. 10
is a heat insulating board on which a condensing unit such as a compressor 11, a condenser 12, an air cooling blower 13, etc. is installed on the top surface, and the cooler 8 and the freezer compartment 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 hidden from view from the outside by a cover unit 16 disposed so as to surround the upper surface of the main body upper wall 14. 17 is a cooler cover that is attached and fixed to the main body upper wall 14 with screws 18, 18 or the like so as to correspond to the heat insulating plate 10 and hide the freezer compartment cold air circulation fan 9 and the cooler 8 from below; The space formed by this cooler cover 17 and the heat insulating plate 10 becomes the cooling chamber 7. The cooler cover 17 has a bottom surface inclined to one side, and the freezer compartment cold air circulation fan 9 is attached to this bottom surface.
A circular hole facing is formed to serve as a blow-in port 19 for cold air in the freezer compartment, and a portion of the rear end of the bottom surface is cut out to serve as a discharge port 20 for cold air in the freezer compartment. Therefore, the cooler 7 and the freezing chamber 4 communicate with each other through the air inlet 19 and the outlet 20. A drain pan 21 is arranged on the inner surface of the cooler cover 17 to receive defrosting water from the cooler 8 during defrosting and drain it out of the main body through a drain channel 22a and a drain hose 22b. ing.

By the way, when the cooling operation is performed and the freezer compartment cold air circulation fan 9 is driven, the freezer compartment air flows from the freezer compartment 4 into the cooling compartment 7 through the suction port 19.
The air is sucked in through the cooler 8, heat-exchanged to become cold air, and is discharged into the freezer compartment 4 through the discharge port 20, circulates within the freezer compartment 4, and then passes through the suction port 19 again. The third @ returns from the freezing chamber 4 to the cooling chamber 7.
A circulating flow shown by arrow A is formed to cool the inside of the freezer compartment 4. Reference numeral 25 denotes a refrigeration discharge duct that guides a portion of the cold air near the suction port 19 to the refrigerating compartment 5 by a refrigerating compartment cold air circulation fan (described later). Reference numeral 26 denotes a refrigeration suction duct which sucks in cold air that has been uniformly circulated within the refrigeration compartment 5 by a refrigeration cold air circulation fan and returns it to the refrigeration compartment 7.

The refrigeration discharge duct 25 and the refrigeration suction duct 26
are in a positional relationship where they are placed facing each other. The refrigeration discharge duct 25 and the refrigeration suction duct 2
6 is embedded in the left and right heat insulating side walls 2A and 2B constituting the freezer compartment 4, as shown in FIG. By embedding the refrigeration discharge duct 25 and the refrigeration suction duct 26 in the left and right heat insulating side walls 2A and 2B, the ducts do not exist in the freezer compartment 4, and the entire freezer compartment 4 is used for storage. It can be used as a part, has a high effective internal volume, and does not decrease like the conventional one. Both of the refrigeration discharge duct 25 and the refrigeration suction duct 26 have a bent portion 25 at the upper end that is bent at right angles toward the cooling chamber 7 and extends horizontally.
a, 26a, the end opening of this bent part 25a becomes the cold air introduction port 27 to the refrigerator compartment 5, and one bent part 26a
A cold air outlet 2 for discharging cold air from the refrigerator compartment 5 into the cooling compartment 7 so that the end port of the refrigerator joins the cold air in the freezer compartment.
It is 8. Naturally, the refrigeration discharge duct 2
The end port at the lower end of 5 becomes the discharge port 29 for the introduced cold air,
The end opening at the lower end of the refrigeration suction duct 26 serves as a suction port 30 for returning cold air from the refrigeration room to the cooling room 7 through the refrigeration suction duct 26 . Reference numeral 31 denotes a damper device which is disposed close to the discharge port 29 and opposite to the refrigerator compartment 5, and controls the discharge port 29 to open or close to adjust the amount of cold air sent into the refrigerator compartment 5. For example, the damper 32 is an electric type that is opened and closed by a motor 33, and the damper device may be a mechanical type. Note that this damper device 31 controls the intake of cold air into the refrigerator compartment 5, but this damper device t31 is not necessarily necessary for taking in cold air; rather, the refrigerator compartment cold air circulation fan that is slowed down is used instead. Its main function is to take in cold air. Reference numeral 34 denotes a cold air circulation fan for the refrigerating room, which is arranged almost in parallel with the damper group W31, and is positioned offset from the refrigerating discharge duct 25 and the refrigerating suction duct 26. The damper device f31 and the refrigerator compartment cold air circulation fan 34 are housed in a suction/discharge box 35 attached to the inner surface of one side wall of the refrigerator compartment 5. Further, a circular hole formed in the intake/discharge box 35 corresponding to the refrigerator compartment cold air circulation fan 34 serves as an outlet for cold air in the refrigerator compartment, and this outlet is covered with a fan guard 37 .

Therefore, when the cooling operation is performed and the freezer compartment cold air circulation fan 9 and the refrigerator compartment cold air circulation fan 34 are driven, the freezer compartment cold air circulation fan 9 draws the suction as shown by each arrow B in FIG. A part of the cold air sucked from the freezer compartment 4 into the cooling compartment 7 through the opening 19 is forcibly sucked by the refrigerator compartment cold air circulation fan 34 through the refrigeration discharge duct 25, which is then opened. The cold air enters the space inside the suction/discharge box 35 from the damper 32 , bends its path to the side, and is blown out into the refrigerator compartment 5 over a wide range by the refrigerator compartment cold air circulation fan 34 . The cold air in the refrigerator compartment that has uniformly circulated in the refrigerator compartment 5 flows upward by the cold air circulation fan 9 in the freezer compartment, enters the cooling compartment 7, and merges with the cold air in the freezer compartment (indicated by arrow A). It passes through the cooler 8, is cooled again, and is sent to the freezing chamber 4. After circulating in the freezing chamber 4, it enters the cooling chamber 7 again through the suction port 19.

Also, a part of it becomes a circulation flow introduced into the refrigeration discharge duct 25, and cools the inside of the refrigeration compartment 5 to a temperature suitable for refrigeration. Note that by controlling the opening and closing of the damper 32 by a temperature sensor (not shown) provided in the refrigerator compartment 5 and adjusting the amount of cold air sent into the refrigerator compartment 5, it is possible to control the freezing temperature to a predetermined temperature. Become. Reference numerals 38 and 39 designate mesh shelves provided in the freezer compartment 4 and the refrigerator compartment 5, respectively, and the mounting positions of the mesh shelves can be freely adjusted and are arranged in multiple stages vertically. The mesh shelves 38 in the freezer compartment and the mesh shelves 39 in the refrigerator compartment are of the same size and can be used in common.

Next, a method of embedding the refrigeration discharge duct 25 and the refrigeration suction duct 26 in the heat insulating side walls 2A and 2B will be explained based on FIGS. 5 and 6.

The refrigeration suction duct 2 is formed by processing an aluminum plate.
5 (the same applies to the refrigeration suction duct 26, so the refrigeration discharge duct 25 will be described as a representative) is an outer box 40 that forms the outer wall of the refrigerator body, the freezer compartment 4, and the refrigerator compartment 5, respectively. The forming scoop is disposed between the cooling indoor box 47 and the refrigerating indoor box 49, and the heat insulating material 42 is foamed and filled between the inner and outer boxes to be buried in the heat insulating side walls 2A, 2B. For this purpose, the freezer compartment box 47 and the refrigerator compartment box 4
The cold shoulder discharge duct 25 is installed in advance on the 9 side. 4. In the refrigeration discharge duct 25, insert the cold air inlet 27 portion at the upper end into the opening 44 of the unit breaker 43, and open the opening 44.
The cold air inlet 2 is in a slightly protruding state.
The unit breaker 43 is attached and fixed to the flanges 45.45 protruding from both ends of the ' section with screws 46.46. Further, the unit breaker 43 itself is fixed at its lower side portion 43a to the freezer compartment box 47 by suitable attachment means. On the other hand, at the discharge port 29 portion at the lower end of the refrigeration discharge duct, the discharge port 29 is placed against one side of a refrigerator compartment box 49 in which an opening 48 of the same size as the discharge port 29 is formed. Reference numerals 50 and 50 are abutting pieces formed to extend from the upper and lower edges of the discharge port 29. A synthetic resin duct opening 51 is fitted from the opposite side of the opening 48, and its side peripheral wall portion 51a is fitted into the discharge port 29 portion of the refrigeration discharge duct 25. At this time, claws 5 provided on two sides respectively on the upper and lower surfaces of the side peripheral wall portion 51a.
3.53 is hooked on the back edge of the opening 48 as shown in FIG. 5 to prevent it from being removed from the refrigerator compartment box 49. Finally, from the back side of the refrigerating discharge duct 25, insert the mounting screws 54 and 54 into the mounting boss 5 of the refrigerating compartment box 49.
5. Tighten and fix at 55. In this way, the upper end of the refrigeration discharge duct 25 is attached and fixed to the freezer compartment box 47 through the unit breaker 43, while the lower end of the refrigeration discharge duct 25 is connected to the refrigerator compartment box 47 through the duct opening 51. As a result, the refrigerating discharge duct 25 is attached to each inner box in advance. Then, each of the inner boxes to which the refrigeration discharge duct 25 is attached is placed inside 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 attachment means. After such setting, the air space between the outer box 40, each inner box 47, 49, and the refrigeration discharge duct 25 is foamed and filled with a heat insulating material 42, and the refrigeration discharge duct 25 is formed into the heat insulating side wall. It will be buried in 2A.

(g) Effects of the Invention As described above, according to the present invention, the main body is constructed of a heat insulating wall, and the freezer compartment is separated into the upper part by a partition plate.

A refrigerator compartment is formed at the bottom, and the freezer compartment is cooled by sending and circulating cold air using a cooler placed in the cooling compartment above and a freezer compartment cold air circulation fan. A refrigerating outlet duct having a circulation fan and guiding a part of the cold air circulating between the freezing compartment and the cooling compartment to the refrigerating compartment by the refrigerating compartment cold air circulation fan for cooling the refrigerating compartment; The refrigeration suction duct that returns cold air to the cooling room is buried within the insulated side wall of the main unit, so the freezer room can be used more widely than the conventional system in which both ducts are placed inside the freezer room. , the effective internal volume is improved.

Since both ducts can be buried together in the side wall during the process of foam-filling the side wall with insulation material, there is no need to install the duct in the freezer during the assembly process, which is required in the past, and the installation of the duct into the main unit is very easy. can be easily achieved.

Furthermore, the freezer and refrigerator compartments can be made to have the same planar area, and the mesh shelves installed there can also be used in common, reducing the number of parts and costs.

Many effects can be expected.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of the refrigerator of the present invention, Fig. 2 is a vertical sectional view taken along the line XX in Fig. 1, Fig. 3 is a perspective view of the main parts of the refrigerator of the invention, also showing cold air circulation, and Fig. 4. is a vertical sectional view taken along the Y-Y line in FIG.
It is an exploded perspective view of the main component parts in a figure. 2...Insulating wall, 2A, 2B...Insulating side wall, 3...
Insulation partition plate, 4... Freezer room, 5... Refrigerator room, 7...
・Cooling room, 8... Cooler, 9... Freezer room cold air circulation fan, 10... Heat insulation plate, 19... Suction port, 20...
・Freezer room cold air discharge port, 25...refrigeration discharge duct,
26...Refrigerating suction duct, 34...Refrigerating room cold air circulation fan.

Claims (1)

[Claims] (1) The storage room inside the main body is divided into upper and lower sections with insulating walls, the upper part is the freezer compartment, and the lower part is the refrigerator compartment. A cooling chamber having a cold air suction port and housing a cooler and a freezer cold air circulation fan therein is provided, and a part of the cold air near the cold air suction port among the cold air returning to the cooling chamber is transferred to the refrigerator compartment. A refrigerating discharge duct that leads to the refrigerating room by a refrigerating room cold air circulation fan arranged;
In a refrigerator equipped with a refrigeration suction duct that returns cold air from the refrigeration room to the cooling room from near the cold air suction port, the refrigeration discharge duct and the refrigeration suction duct are embedded in left and right heat insulating side walls constituting the main body. A refrigerator featuring