WO2019167304A1

WO2019167304A1 - Refrigerator

Info

Publication number: WO2019167304A1
Application number: PCT/JP2018/028608
Authority: WO
Inventors: 伊藤　敬; 誠岡部; 努小高
Original assignee: 三菱電機株式会社
Priority date: 2018-03-01
Filing date: 2018-07-31
Publication date: 2019-09-06
Also published as: WO2019167223A1; AU2019226979B2; JPWO2019167755A1; TWI694230B; AU2019226979A1; SG11202008287SA; JP6854965B2; TW201937122A

Abstract

Provided is a refrigerator in which it is possible to prevent freezing in a defrost pipe without diminishing the overall heat insulating properties and ease of assembly of the refrigerator. The refrigerator is equipped with: a box body that has an inner box forming a storage chamber and an outer box forming an outer frame on the outer side of the inner box; a cooling device that generates cold air; a compressor that operates the cooling device; a drain pan that collects defrost water generated from the cooling device; a defrost pipe that allows the defrost water to flow to the drain pan; a first vacuum insulation panel that is fixed to the outer box; and a second vacuum insulation panel that is fixed to the inner box. The cooling device, the compressor, and the defrost pipe are provided between the inner box and the outer box, and the second vacuum insulation panel is disposed between the inner box and the defrost pipe and has smaller dimensions than the first vacuum insulation panel.

Description

refrigerator

The present invention relates to a refrigerator, and more particularly to a defrost water drainage structure and a vacuum heat insulating material installed between an inner box and an outer box of the refrigerator.

A number of refrigerators and refrigeration systems equipped with vacuum insulation have been proposed. For example, in patent document 1, the structure which provided the vacuum heat insulating material between the outer box and the defrost piping installed in the hard urethane foam between an outer box and an inner box is proposed. By keeping the storage room warm by the vacuum heat insulating material, the operation of the cooler and the compressor is suppressed, and the power consumption is suppressed.

Moreover, in patent document 2, the structure which provided the vacuum heat insulating material between the defrost piping and piping etc. which are installed in the hard urethane foam between an inner box and an outer box and an inner box is proposed. . By keeping the temperature of the defrost water with the vacuum heat insulating material, the defrost water is prevented from being cooled and frozen due to the influence of the temperature in the storage chamber.

JP 2005-164193 A JP 2004-101028 A

In the refrigerator of Patent Literature 1, although the storage room can be kept warm by the vacuum heat insulating material, there is a problem that the defrost water is cooled and frozen by the influence of the temperature in the storage room.

In the refrigerator of Patent Document 2, since the inner box for fixing the vacuum heat insulating material avoids interference with peripheral parts, the shape is complicated and it is difficult to ensure the holding power of the adhesive material. Moreover, in order to ensure heat insulation, there existed problems, such as having to install several small vacuum heat insulating materials.

The present invention has been made to solve the above-described problems, and is intended to prevent the defrost piping from freezing without impairing the heat insulation and assembly of the entire refrigerator.

The refrigerator according to the present invention includes an inner box that forms a storage chamber, an outer box that is outside the inner box and forms an outer frame, a cooler that generates cold air, and the cooling A compressor for operating the machine, a drain pan for storing defrost water generated in the cooler, a defrost pipe for flowing the defrost water to the drain pan, and a first vacuum heat insulating material fixed to the outer box A second vacuum heat insulating material fixed to the inner box, and the cooler, the compressor, and the defrost water pipe are between the inner box and the outer box, The two vacuum heat insulating material is installed between the inner box and the defrosting pipe, and has a smaller size than the first vacuum heat insulating material.

According to the refrigerator according to the present invention, the first vacuum heat insulating material fixed to the outer box and the second vacuum heat insulating material fixed to the inner box, the second vacuum heat insulating material from the first vacuum heat insulating material. The dimensions are also reduced. Therefore, freezing of the defrosting pipe can be prevented without impairing the heat insulation and assembly of the entire refrigerator.

It is a front view of the refrigerator which concerns on Embodiment 1 of this invention. It is sectional drawing which looked at the refrigerator which concerns on Embodiment 1 of this invention from the side surface. It is sectional drawing which looked at the refrigerator which concerns on Embodiment 2 of this invention from the side surface. It is sectional drawing which looked at the freezer compartment periphery of the refrigerator which concerns on Embodiment 3 of this invention from the side surface.

Embodiment 1 FIG.
FIG. 1 is a front view of a refrigerator 1 according to Embodiment 1 of the present invention. As shown in FIG. 1, the refrigerator 1 includes a plurality of doors on the front surface and includes a refrigerator room 100, a switching room 200, an ice making room 300, a vegetable room 400, and a freezer room 500. Each of these rooms is also called a storage room. The refrigerator compartment 100 includes an open / close door 11 and is arranged at the top of the refrigerator 1. The switching chamber 200 can be switched between a freezing temperature zone of −18 ° C. and a soft freezing temperature of −7 ° C., is provided with a drawer door 12 and is disposed below the refrigerating chamber 100. The ice making chamber 300 includes the drawer door 13 and is arranged in parallel with the switching chamber 200. The vegetable room 400 includes the drawer door 14 and is disposed below the switching room 200 and the ice making room 300. The freezer compartment 500 includes a drawer door 15 and is arranged at the lowermost part of the refrigerator 1. The temperature of each storage room can be adjusted in the operation part 10, for example. In addition, the form of the refrigerator 1 may be one without the switching chamber 200 and the ice making chamber 300, and is not particularly limited.

FIG. 2 is a cross-sectional view of the refrigerator 1 according to Embodiment 1 of the present invention as viewed from the side. As shown in FIG. 2, the refrigerator 1 includes a box body 50 including an inner box 51 in which a storage chamber is formed and an outer box 52 that is outside the inner box 51 and forms an outer frame. A cooler 17, a compressor 19, and a blower fan 18 are also provided between the inner box 51 and the outer box 52 inside the refrigerator 1.

A first vacuum heat insulating material 54 is fixed to the outer box 52, and a second vacuum heat insulating material 55 is fixed to the inner box 51. The urethane foam 16 is filled between the inner box 51 and the outer box 52, and the first vacuum heat insulating material 54, the second vacuum heat insulating material 55, and the urethane foam 16 prevent heat from entering each storage chamber. It is suppressed. The urethane foam 16 may be a rigid urethane foam, for example.

The cooler 17 generates cool air that cools each storage room. A machine room 24 is formed between the inner box 51 and the outer box 52 at a position adjacent to the freezer compartment 500, and the compressor 19 is accommodated therein. The cooler 17 is disposed above the machine room 24 in which the compressor 19 is disposed, and is operated by the compressor 19 to generate cold air. The cold air generated by the cooler 17 is sent to each storage chamber by the blower fan 18. The temperature of each storage room is detected by a thermistor (not shown) installed in each storage room, and the opening of a damper (not shown), the output of the compressor 19, and the blower fan 18 are set so as to have a preset temperature. It is controlled by adjusting the air flow rate. In each storage room, a food shelf 20, a food storage case 21, and the like are also installed to partition the storage space.

A defrost heater 22, a defrost pipe 53, and a drain pan 23 are provided between the cooler 17 and the compressor 19. The defrost heater 22 is disposed in the lower part of the cooler 17 and melts frost adhering to the cooler 17. The defrosting pipe 53 is a pipe through which the defrosting water passes and communicates from the lower part of the cooler 17 to the machine room 24. The drain pan 23 stores defrosted water, is located below the defrost pipe 53, and is disposed on the upper surface of the compressor 19. The defrosting pipe 53 may be provided so as to connect the cooler 17 and the drain pan 23.

The 1st vacuum heat insulating material 54 arrange | positioned at the outer box 52 is planar shape, and has covered the back of the refrigerator compartment 100, the switching room 200, the ice making room 300, and the vegetable compartment 400. FIG. The first vacuum heat insulating material 54 is not disposed between the outer box 52 and the machine room 24 adjacent to the freezer compartment 500. The first vacuum heat insulating material 54 is bonded to the outer box 52 with an adhesive or the like.

The second vacuum heat insulating material 55 arranged in the inner box 51 is located between the freezer compartment 500, the defrosting pipe 53 and the machine room 24. The second vacuum heat insulating material 55 is smaller in size than the first vacuum heat insulating material 54, and a part of the second vacuum heat insulating material 55 is formed in a bent shape so as to follow the shape of the inner box 51. Here, the dimension of the first vacuum heat insulating material 54 or the second vacuum heat insulating material 55 is the length in the vertical direction, the left-right direction and the thickness direction in the state before the second vacuum heat insulating material 55 is bent, or It refers to the surface area. The second vacuum heat insulating material 55 is adhered to the inner box 51 formed so as not to interfere with peripheral parts such as the defrosting pipe 53 and the machine room 24 by an adhesive or the like.

During operation of the refrigerator 1, frost may adhere to the cooler 17 when the temperature around the cooler 17 becomes low. The frost adhering to the cooler 17 is melted by the defrost heater 22 and becomes defrost water. The defrost water passes through the defrost pipe 53 between the cooler 17 and the drain pan 23 and is stored in the drain pan 23 disposed on the upper surface of the compressor 19. The defrost water evaporates due to the heat of the compressor 19 and is discharged from an outlet 25 provided in the machine room 24.

The defrosting pipe 53 through which the defrosting water passes is insulated from the low temperature freezer compartment 500 by the second vacuum heat insulating material 55 provided between the inner box 51 and the defrosting pipe 53. Therefore, it is possible to suppress the defrost water from being cooled due to the temperature of the freezer compartment 500 and to suppress heat input from the compressor 19 and outside air to the freezer compartment 500.

Since the 1st vacuum heat insulating material 54 is not provided between the defrost piping 53 and the machine room 24, and the outer case 52, the heat insulation between the defrost piping 53 and the machine room 24, and external air becomes low. Yes. Therefore, it is easy to release heat from the compressor 19 disposed in the machine room 24 to the outside of the refrigerator 1 and improve heat input from the outside air to the defrosting pipe 53.

The first vacuum heat insulating material 54 is easy to fix because it has a large size and a flat shape, and can maintain an adhesive force because it has a wide bonding surface. The second vacuum heat insulating material 55 is smaller in size than the first vacuum heat insulating material 54 and thus has a small weight. Is prevented.

The refrigerator 1 according to Embodiment 1 described above is arranged between the first vacuum heat insulating material 54 fixed to the outer box 52, the inner box 51 and the defrosting pipe 53, and the first vacuum heat insulating material 54. And a second vacuum heat insulating material 55 having a smaller dimension. Therefore, adhesion of the first vacuum heat insulating material 54 and the second vacuum heat insulating material 55 can be ensured. Further, heat input from outside air to each storage chamber is suppressed. Further, since the first vacuum heat insulating material 54 is not provided between the defrosting pipe 53 and the machine room 24 and the outer box 52, the heat generated from the compressor 19 can be efficiently released to the outside of the refrigerator 1. The heat input from the outside air to the defrosting pipe 53 is improved, and freezing of the defrosted water can be suppressed.

Further, since the second vacuum heat insulating material 55 is located between the inner box 51 and the defrosting pipe 53, the defrost water flowing through the defrosting pipe 53 is cooled and frozen by the influence of the temperature of the freezer compartment 500. Can be suppressed.

Further, since the second vacuum heat insulating material 55 is located between the inner box 51 and the machine room 24 in which the compressor 19 is disposed, heat input from the compressor 19 and the outside air to the freezer compartment 500 is suppressed, The power consumption of the refrigerator 1 can be suppressed.

Further, the second vacuum heat insulating material 55 smaller than the first vacuum heat insulating material 54 is formed to be bent along the shape of the machine room 24 so as not to interfere with peripheral parts such as the defrosting pipe 53 and the machine room 24. The contact surface with the inner box 51 made can be increased. Therefore, the adhesive force between the second vacuum heat insulating material 55 and the inner box 51 can be improved, and peeling of the second vacuum heat insulating material 55 due to secular change or the like can be prevented. Moreover, since it is not necessary to divide the 2nd vacuum heat insulating material 55 into plurality, while being able to improve a coverage and heat insulation, it can also suppress that workability | operativity deteriorates.

Further, the first vacuum heat insulating material 54 is not located between the outer box 52 and the compressor 19, but is not located between the outer box 52 and the defrosting pipe 53. Therefore, the heat generated from the compressor 19 is efficiently released to the outside of the refrigerator 1 and the power consumption of the refrigerator 1 can be suppressed.

Embodiment 2. FIG.
FIG. 3 is a cross-sectional view of the refrigerator 1 according to Embodiment 2 of the present invention as viewed from the side. Although the basic configuration is the same as that of the first embodiment, the configuration related to the defrosting pipe 53 and the first vacuum heat insulating material 54 is different from that of the first embodiment.

As shown in FIG. 3, the defrosting pipe 53 of the refrigerator 1 according to the second embodiment includes a defrosting pipe heater 56 that is energized according to the operating state of the refrigerator 1 and the surrounding environment. The defrosting pipe heater 56 is preferably fixed to the defrosting pipe 53.

The first vacuum heat insulating material 54 covers the back of the refrigerator compartment 100, the switching room 200, the ice making room 300, and the vegetable room 400, and extends to the outer box 52 so as to reach between the defrosting pipe 53 and the outer box 52. It is fixed. However, the first vacuum heat insulating material 54 does not cover the machine room 24 with the compressor 19.

The frost adhering to the cooler 17 is melted by the defrost heater 22 to reach the defrost pipe 53 as defrost water, and the defrost pipe 53 while receiving heat from the defrost pipe heater 56 provided in the defrost pipe 53. The water is stored in the drain pan 23. And defrost water evaporates with the heat | fever of the compressor 19, and is discharged | emitted outside.

The heat input to the defrosting pipe 53 is improved by providing the heater 56 for the defrosting pipe. Thereby, also when the defrost piping 53 becomes low temperature with the cold air from each store | warehouse | chamber, it is suppressed that the defrost water is cooled and frozen by the defrost piping 53. FIG.

Also, a first vacuum heat insulating material 54 is disposed between the defrosting pipe 53 and the outer box 52, and the defrosting pipe 53 and the outside air are insulated. Therefore, it is possible to suppress the heat of the defrosting pipe heater 56 from being efficiently input into the defrost water and radiated to the outside air.

The refrigerator 1 according to the second embodiment described above includes the defrosting pipe heater 56 fixed to the defrosting pipe 53, and the first vacuum heat insulating material 54 is between the defrosting pipe 53 and the outer box 52. positioned. Thereby, heat radiation from the defrosting pipe heater 56 to the outside air is suppressed, and heat is efficiently input to the defrosting water in the defrosting pipe 53, so that power consumption can be suppressed.

In addition, since the first vacuum heat insulating material 54 is not located between the outer box 52 and the compressor 19, heat generated from the compressor 19 can be efficiently released to the outside of the refrigerator 1. Can be suppressed.

Embodiment 3 FIG.
FIG. 4 is a cross-sectional view of the periphery of the freezer compartment 500 of the refrigerator 1 according to Embodiment 3 of the present invention as viewed from the side. Although the basic configuration is the same as that of the first embodiment, the shape of the second vacuum heat insulating material 55 is different from that of the first embodiment.

As shown in FIG. 4, in the refrigerator 1 according to Embodiment 3 of the present invention, a first concave shape 55 a and a second concave shape 55 b are formed in the second vacuum heat insulating material 55.

The first concave shape 55 a of the second vacuum heat insulating material 55 is formed on the contact surface with the inner box 51. A convex shape 51 a is formed in the inner box 51 in which the second vacuum heat insulating material 55 is disposed. The convex shape 51 a and the first concave shape 55 a are engaged, and the second vacuum heat insulating material 55 is engaged with the inner box 51. Is fixed.

The second concave shape 55 b of the second vacuum heat insulating material 55 is formed on the surface opposite to the contact surface with the inner box 51. The second concave shape 55b is provided at a location where the inner box 51 and the machine room 24 are close to each other. And the 1st concave shape 55a and the 2nd concave shape 55b are provided away so that it may not overlap on a projection surface.

The second vacuum heat insulating material 55 is arranged along the inner box 51 in which the convex shape 51a is formed. And the 1st concave shape 55a of the 2nd vacuum heat insulating material 55 and the convex shape 51a formed in the inner box 51 are engaged, and the 2nd vacuum heat insulating material 55 is positioned. In this state, the second vacuum heat insulating material 55 and the inner box 51 are bonded and fixed with an adhesive or the like.

The second vacuum heat insulating material 55 fixed to the inner box 51 is covered with the urethane foam 16 on the surface opposite to the contact surface with the inner box 51. The second concave shape 55b provided in the second vacuum heat insulating material 55 becomes a flow path of the urethane foam 16 and improves the flowability, so that the urethane foam 16 is uniformly filled.

In addition, in the configuration of the first concave shape 55a and the second concave shape 55b of the third embodiment, the configuration of the defrosting pipe heater 56 of the second embodiment may be combined.

As described above, in the refrigerator 1 according to the third embodiment, the second vacuum heat insulating material 55 has the first concave shape 55 a on the contact surface with the inner box 51. Therefore, the contact surface between the second vacuum heat insulating material 55 and the inner box 51 can be increased. Moreover, since the 1st recessed shape 55a can be used as the reference | standard of the fixing position of the 2nd vacuum heat insulating material 55 with respect to the inner box 51, while positioning at the time of an adhesion | attachment operation | work becomes easy, the 2nd vacuum heat insulating material 55 is made into plan dimensions It can be installed with high accuracy.

Further, the second vacuum heat insulating material 55 has a second concave shape 55 b on the surface opposite to the contact surface with the inner box 51. Therefore, mutual interference and extreme approach are prevented at the location where the second vacuum heat insulating material 55 and the machine room 24 are close to each other, and the flow path of the urethane foam 16 is sufficiently secured. Thereby, the fluidity | liquidity and filling property of the urethane foam 16 improve, the thermal influence from the machine room 24 to the freezer compartment 500 can be reduced, and power consumption can be suppressed.

Also, the first concave shape 55a and the second concave shape 55b are formed at positions that do not overlap on the projection plane. Therefore, the second vacuum heat insulating material 55 is extremely thinned to prevent the heat insulating property from being impaired, and the mounting workability of the second vacuum heat insulating material 55, the flowability of the urethane foam 16, and the filling property are reduced. Can be improved.

Moreover, the convex shape 51a formed in the inner box 51 is engaged with the first concave shape 55a formed on the contact surface with the second vacuum heat insulating material 55, thereby facilitating positioning during the bonding operation. be able to.

1 refrigerator, 10 operation unit, 11 open / close door, 12, 13, 14, 15 drawer door, 16 urethane foam, 17 cooler, 18 blower fan, 19 compressor, 20 food shelf, 21 food storage case, 22 defrost heater , 23 Drain pan, 24 Machine room, 25 Outlet, 50 Box, 51 Inner box, 51a Convex shape, 52 Outer box, 53 Defrost piping, 54 First vacuum heat insulating material, 55 Second vacuum heat insulating material, 55a first Concave shape, 55b second concave shape, 56 heater for defrosting pipe, 100 refrigeration room, 200 switching room, 300 ice making room, 400 vegetable room, 500 freezer room.

Claims

A box having an inner box that forms a storage chamber, and an outer box that is outside the inner box and forms an outer frame;
A cooler generating cold air;
A compressor for operating the cooler;
A drain pan for storing defrost water generated in the cooler;
A defrost pipe for flowing the defrost water to the drain pan;
A first vacuum heat insulating material fixed to the outer box;
A second vacuum heat insulating material fixed to the inner box,
The cooler, the compressor, and the defrosting pipe are between the inner box and the outer box,
The second vacuum heat insulating material is
Installed between the inner box and the defrosting pipe,
The dimensions are smaller than the first vacuum heat insulating material,
refrigerator.
The second vacuum heat insulating material is installed between the inner box and the compressor,
The refrigerator according to claim 1.
The second vacuum heat insulating material is installed along the outside of the inner box,
The refrigerator according to claim 1 or 2.
The second vacuum heat insulating material has a bent shape along the shape of the inner box,
The refrigerator according to any one of claims 1 to 3.
The first vacuum heat insulating material is not located between the outer box and the defrosting pipe,
The refrigerator according to any one of claims 1 to 4.
A heater fixed to the defrosting pipe,
The first vacuum heat insulating material is located between the outer box and the defrosting pipe;
The refrigerator according to any one of claims 1 to 4.
The first vacuum insulation is not located between the outer box and the compressor;
The refrigerator according to any one of claims 1 to 6.
The second vacuum heat insulating material has a first concave shape on a contact surface with the inner box,
The refrigerator according to any one of claims 1 to 7.
The second vacuum heat insulating material has a second concave shape on the surface opposite to the contact surface with the inner box,
The refrigerator according to any one of claims 1 to 8.
The second vacuum heat insulating material is
Having a first concave shape on the contact surface with the inner box,
Having a second concave shape on the surface opposite to the contact surface with the inner box;
The first concave shape and the second concave shape do not overlap on the projection plane,
The refrigerator according to any one of claims 1 to 7.
The inner box includes a convex shape formed on a contact surface with the second vacuum heat insulating material,
The first concave shape and the convex shape are engaged,
The refrigerator according to claim 10.