JPS596378Y2 - electric refrigerator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric refrigerator equipped with a blower device for circulating cold air.

This type of blower device includes a motor-in-house installation method in which a fan drive motor is installed together with a blower fan inside the oven.
A method of installing the motor outside the refrigerator is known, in which the fan drive motor is installed outside the refrigerator. However, according to the former method, the heat generated inside the refrigerator by the motor requires an additional increase in cooling power. , power consumption increases accordingly.

Although the latter method of installing the motor outside the refrigerator does not cause the same problems as the former, there are still some points that need to be improved.

In other words, the blower fan and fan drive motor are located in the outer box,
Since the insulation material between the inner boxes is placed between them, one side is installed on the inside of the refrigerator and the other on the outside of the refrigerator, so when installing this blower, we had to attach the fan drive motor to the outer box on the outside of the refrigerator. Afterwards, it was necessary to attach the blower fan to the rotating shaft of the motor from inside the refrigerator, and this attachment took a considerable amount of time and effort.

On the other hand, since the fan drive motor, dustproof cover, etc. are provided so as to protrude from the outer box, these parts are the most susceptible to shock when handling the refrigerator, and also have a good appearance. It wasn't.

Therefore, the purpose of the present invention is to form a motor storage space between the outer box and the inner box, and to install the fan drive motor from the inside of the refrigerator, thereby making it extremely easy to install the blower. Another object of the present invention is to provide an electric refrigerator which can simplify the structure of an outer box and can effectively radiate heat generated from a motor.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 1, a cross section of the part where the cold air circulation blower is installed is shown.
Reference numeral 1 denotes an outer box made of a thin iron plate that gives the external shape of the refrigerator, and 2 an inner box made of plastic. In this figure, the freezer compartment is shown.

A fan drive motor 3 is provided between the outer box 1 and the inner box 2.
A casing 4 is disposed to form a storage space for the casing, and the area other than the casing 4 is filled with a heat insulating material 5 formed by injection molding of foamable synthetic resin, that is, by foaming in place. has been done.

Referring to FIG. 2, the inner box 2 is connected to the outer box 1 from its back wall.
It has a convex wall 6 projecting in a cylindrical shape toward the side, and a window 7 large enough for the motor 3 to pass through is bored in the convex wall 6.

The casing 4 has a convex wall 6 as shown in FIG.
a front wall 8 abutted against the front wall 8, and an annular protruding rib 9 fitted around the cylindrical circumferential wall of the convex wall 6;
A window 10 having the same size as the hole 7 is provided.

The rear portion of the casing 4 facing the outer case 1 is open, and a flange 12 extending almost parallel to the outer case 1 is formed on the peripheral wall 11 on the open end side.

This casing 4 is placed between the outer box 1 and the inner box 2 before being filled with resin that forms the heat insulating material 5.
In this case, a sealing material 13 is interposed between the outer circumferential surface of the protruding wall 6 and the inner circumferential surface of the annular protruding rib 9, and the rib 9 is pushed around the protruding wall 6 by compressing the sealing material 13. By inserting the casing 4 into the inner box 2, the casing 4 is temporarily fixed to the inner box 2.

Further, the gap existing between the rear end of the casing 4 and the outer box 1 is sealed by a sealing material 14 disposed at a step formed by the peripheral wall 11 and the flange 12 of the casing 4.

This reliably prevents the heat insulating material 5 from flowing into the casing 4 during on-site foaming.

Note that foamed polyethylene or foamed polyurethane is used for the sealing materials 13 and 14.

Further, as shown in FIGS. 1 and 4, within the casing 4, a bracket 15 for supporting the rear of the motor 3 is integrally provided on the inner wall of the casing.

This bracket 15 is connected to the motor 3 via a vibration isolating rubber 16.
It has a mounting {L18 that supports the rear of the case, but in addition to this, it has an attachment that extends toward the front, that is, toward the inner box 2 side,
A motor positioning member 19 is provided, which is a plate-like or rod-like member that acts on the iron core 3a of the motor 3 and prevents rotation of the motor housing when the motor 3 is started.

In this embodiment, a state is shown in which the tip of the motor positioning member 19 is inserted into a hole 3b provided in the iron core 3a via a vibration isolating rubber 20. The tip may be disposed so as to come into contact with and support the lower end of the iron core portion 3a, and further,
Such a motor positioning member may be implanted on the iron core 3a side, and a hole into which the tip of this positioning member is inserted may be provided on the bracket 15 side.

The motor positioning member 19 also has the function of supporting the motor 3 in a cantilevered manner until the rear part of the motor 3 is attached to the bracket 15 and the front part thereof is supported by a shielding cover integral 21 to be described later. ing.

The integral shielding cover 21 is attached to the convex wall 6 of the inner box 2 from the inside of the refrigerator, supports the front of the motor 3, and thermally shields the interior of the refrigerator and the motor storage space.

That is, this integral shielding cover 21 is made of a disk member shaped so as to bulge toward the inside of the refrigerator, and has a through hole 23 for the drive shaft 22 of the motor 3 and a vibration damping hole in the center thereof. Four parts 24 that support the front of the motor 3 via the rubber 17
are installed coaxially.

A first heat insulating layer 25 made of foamed polystyrene or the like and a second heat insulating layer 26 made of a material with excellent elastic restoring force such as foamed polyethylene are provided within the shielding force bar assembly 21.

In this case, the second heat insulating layer 26 disposed on the motor storage space side has a size that completely covers the window 7 of the convex wall 6,
A hole 27 having a diameter smaller than the outer diameter of the motor housing is provided in the center.

Therefore, when this shielding cover integral 21 is fixed within the convex wall 6 of the inner box 2 with the screws 28, the second heat insulating layer 2
The periphery of the hole 27 is in close contact with the opening periphery of the windows 7 and 10, and the peripheral edge of the hole 27 is in close contact with the front surface of the motor housing, so that the motor storage space is completely shielded from the inside of the refrigerator.

The second heat insulating layer 26 has a thickness that can tolerate errors in the mounting dimensions of the motor 3, and is constructed so that it can be tightly attached to the front surface of the motor housing even if some errors occur when mounting the motor 3. It has been.

Further, a mouth ring 29 provided concentrically with respect to the through hole 23 is integrally formed on the shielding cover unit 21 via a connecting member 30 extending radially.

As a result, the blower fan 31 attached to the drive shaft 22
and the mouth ring 29 are precisely positioned concentrically.

Reference numeral 32 denotes a back plate of the freezer compartment, and this back plate 32 is provided with an opening 33 that allows the shielding cover unit 21 to pass through, and the mouth ring 29 is engaged with the peripheral edge of this opening 33. .

Note that 34 is a cold air blowing grill that is removably snapped onto the back plate 32, and 35 is an evaporator disposed between the inner box 2 and the back plate 32.

The cold air cooled by the evaporator 35 is blown out from the grill 34 to the freezer compartment and the refrigerator compartment by a blowing fan 31 that is rotationally driven by the motor 3, thereby cooling the respective compartments.

On the other hand, the heat released from the motor 3 into the motor storage space during the cooling operation is radiated to the outside of the refrigerator through the outer box 1.

In this case, since the inside of the refrigerator and the motor storage space are completely shielded by the shielding cover 21 as described above, cold air will not enter into the motor storage space, and the heat generated from the motor 3 will be prevented. will not affect the inside of the refrigerator.

In addition, in the present invention, the heat generated from the motor 3 is transferred to the outer box 1.
In order to more effectively dissipate heat through the outer box 1, a member with good heat conduction, for example, aluminum foil 36, is provided along the inner wall surface of the outer box 1.

That is, the aluminum foil 36 extends from the inner wall surface of the outer box 1 forming one side of the motor storage space beyond the sealing material 14 and further along the inner wall surface.

As a result, the heat released from the motor 3 into the motor storage space is quickly conducted to the wall surface of the outer box 1 around the motor storage space via the aluminum foil 36, and is radiated to the outside from there.

Accordingly, convection of air within the motor storage space is promoted, so that excessive temperature rise of the motor 3 can be prevented.

Note that, of course, other heat conductive members may be used instead of aluminum foil.

This cold air circulation blower device is assembled as follows.

First, by press-fitting the annular protruding rib 9 of the casing 4 around the convex wall 6 of the inner box 2 via the sealing material 13,
The casing 4 is temporarily fixed to the inner box 2, and the inner box 2 is attached to the outer box 1.
Assemble inside.

In this case, aluminum foil 36 is attached in advance to a predetermined location on the inner wall surface of the outer box 1, and the gap created between the rear end of the casing 4 and the outer box 1 is closed by the sealing material 14. .

Next, a heat insulating material 5 is formed between the outer box 1 and the inner box 2 by foaming on site.
Fill it.

The casing 4 is fixed between the outer box 1 and the inner box 2 by this heat insulating material 5.

The motor is installed in the motor storage space formed by the cylindrical casing 4 from inside the refrigerator.

That is, the motor 3 is guided into the casing 4 from the inner box 2 side through the windows 7 and 10, and the rear part of the motor 3 is inserted into the mounting hole 18 of the bracket 15 via the anti-vibration rubber 16, and the rear part of the motor 3 is inserted through the hole in the iron core 3a. 3b as motor positioning member 1
9, and the motor 3 is held cantilevered by this positioning member 19.

This eliminates the need for the operator to support the front of the motor 3 with his or her hands, so that subsequent work can be carried out easily.

Next, the anti-vibration rubber 17 is attached to the front of the motor 3, the drive shaft 22 of the motor 3 is inserted into the through hole 23, and the shielding cover unit 21 is attached to the recess of the convex wall 4 of the inner box 2. This is fixed with screws 28.

As a result, the second heat insulating layer 26 is brought into close contact with the windows 7 and 10 and the front surface of the motor housing with deformation, and the motor space is completely shielded from the interior of the refrigerator.

A blower fan 3 is attached to the drive shaft 22 protruding into the inside of the refrigerator.
1 and snapping the grill 34 to the back plate 32 of the freezer compartment completes the assembly process.

As explained above, according to the present invention, the outer box 1 and the inner box 2
A motor storage space is formed between the casing 4 and a part of the outer box 1, and the motor 3 is installed in this motor storage space from the inside of the refrigerator, making the installation work of the blower easier. can be simplified.

In this case, a member with good thermal conductivity such as aluminum foil 36 extending from the motor storage space is attached to the inner wall surface around the outer box 1 forming the motor storage space. The heat generated from the motor 3 can also be radiated from the wall surface of the outer box 1 around the motor storage space, so that excessive temperature rise of the motor 3 can be suppressed.

Also, since the motor 3 is covered by the outer box 1,
There is no need for a dustproof cover, and the structure and design of the outer box 1 can also be simplified.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of an embodiment of the present invention, FIG. 2 is a rear perspective view of the inner box, and FIG. 3 is a front perspective view of the casing.
FIG. 4 is a rear view of the casing. In the figure, 1 is an outer box, 2 is an inner box, 3 is a fan drive motor,
4 is a cylindrical casing, 5 is a heat insulating material, 21 is an integrated shielding cover, 31 is a blower fan, and 36 is an aluminum foil.

Claims (1)

[Scope of Claim for Utility Model Registration] An electric refrigerator that has a blower device for circulating cold air inside the refrigerator consisting of a blower fan and a motor for driving the fan, which includes an outer box that forms the external shape of the refrigerator, and a heat insulating material inside the outer box. an inner box disposed between the outer box and the inner box, the inner box having a window opening toward the outer box; a cylindrical casing whose other end is closed by the outer box, the motor being installed inside the casing through the window, and a shielding cover that closes the window; On the inner wall surface of the outer box that closes the other end,
An electric refrigerator characterized in that a heat conductive member such as aluminum foil is attached that extends from the inside of the casing to the outside of the casing.