TWI781501B - refrigerator - Google Patents

Abstract

The refrigerator system includes: a heat-insulated box, which is equipped with a storage room and a cooling room inside; a cooler, which is arranged in the cooling room, and cools the air supplied to the storage room; a defrosting device, which removes the air attached to the cooler. frost; and a control device for controlling the defrosting device during defrosting operation; the defrosting device has a main heater and an auxiliary heater connected in parallel with the main heater or electrically independent; the control device is During defrosting operation, the main heater and auxiliary heater are individually controlled.

Description

refrigerator

This disclosure relates to a refrigerator with a defrosting device.

Conventionally, a refrigerator having a defrosting device has been disclosed (for example, refer to Patent Document 1). The refrigerator of Patent Document 1 includes: a closed glass tube heater as a defrosting device disposed below the cooler; and an auxiliary heater as a wire heater disposed on the back side of the cooler.

[Prior patent documents]

[Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2019-113296

In Patent Document 1, since the glass tube heater and the auxiliary heater are electrically connected in series, the glass tube heater and the auxiliary heater always operate in conjunction with each other. Therefore, the glass tube heater and the auxiliary heater cannot be operated individually, and both heaters are operated even when a small amount of frost is to be melted. As a result, there is a problem that electric power is consumed more than necessary.

This disclosure was developed to solve the above-mentioned problems, and an object thereof is to provide a refrigerator with improved energy saving.

The refrigerator disclosed in this disclosure includes: a heat-insulated box body, which is equipped with a storage room and a cooling room inside; a cooler, which is arranged in the cooling room, and cools the air supplied to the storage room; a defrosting device, which removes the frost attached to the cooler; and a control device for controlling the defrosting device during defrosting operation; the defrosting device has a main heater, and is electrically connected in parallel with the main heater or electrically Independent auxiliary heater; the control device controls the main heater and the auxiliary heater individually during defrosting operation.

According to the refrigerator disclosed in the present disclosure, the defrosting device has a main heater and an auxiliary heater electrically connected in parallel with the main heater or electrically independent, and the control device controls the defrosting operation individually Main heater and auxiliary heater. Therefore, in the case of melting a small amount of frost, only one heater can be operated, and energy saving can be improved.

Hereinafter, embodiments of the present disclosure will be described based on the drawings. In addition, this indication is not limited by the embodiment described below. In addition, in the following drawings, the relationship of the size of each component may be different from the actual one. Implementation form

Fig. 1 is a perspective view of a refrigerator 100 according to the embodiment seen from the front. Fig. 2 is a perspective view of the refrigerator 100 according to the embodiment with the rear panel 12 turned upward. Fig. 3 is a plan view of a transverse section of the refrigerator 100 of the embodiment.

Hereinafter, the configuration of refrigerator 100 according to the embodiment will be described. In the following descriptions, terms such as "up", "down", "right", "left", "front", and "back" are appropriately used to indicate directions for easy understanding, but these are for illustration purposes only. These terms are not intended to limit the embodiments. In addition, in the embodiment, "up", "down", "right", "left", "front", "back" and the like are used in a state of facing the refrigerator 100 squarely.

As shown in FIGS. 1 to 3 , the refrigerator 100 of the embodiment has a heat-insulating box body 11 , the front side of which is opened, and a plurality of storage rooms are arranged inside. This heat insulation box 11 is constituted by filling the space between the outer box 11a made of steel plate and the inner box 11b of thin hard resin such as ABS resin, and filling the foam heat insulating material 11c such as urethane foam, and the outer box 11a constitutes the outer shell, and the inner box 11b is arranged inside the outer box 11a. Moreover, the outer case 11a is comprised with the back panel 12 and the side panel 13. As shown in FIG.

Inside the heat insulation box 11, as a storage room, a refrigerator room 1, an ice making room 2, a first freezer room 3, a vegetable room 4 and a second freezer room 5 are provided. The refrigerator compartment 1 is arranged on the uppermost section of the refrigerator 100, and the front opening is closed by two double-opening doors so that it can be opened and closed freely. The two double-opening doors are composed of the left door 6a of the refrigerator compartment and the right door 6b of the refrigerator compartment.

Below the refrigerating room 1, an ice making room 2 and a first freezing room 3 are arranged in parallel. When the pull-out door 8 is pulled out, it is pulled out to the user's side. Also, in the lowermost section of the refrigerator 100, a second freezer compartment 5 is provided, and a vegetable compartment 4 is provided above the second freezer compartment 5. This vegetable compartment 4 is installed below the ice making compartment 2 and the first freezer compartment 3 arranged side by side and above the second freezer compartment 5 . The vegetable compartment 4 and the second freezer compartment 5 are also configured to be drawn toward the user when the drawer doors 9 and 10 are drawn out, respectively. In addition, the arrangement|positioning system of each store room is not limited to what was mentioned above.

Regarding the method of filling the foam heat insulating material 11c inside the heat insulating box 11, first, the refrigerator 100 is arranged so that the rear panel 12 provided on the back surface of the heat insulating box 11 is on top as shown in FIG. 2 . Then, the undiluted solution of the foam heat insulating material 11c such as urethane foam is injected from a plurality of injection ports 14 provided in the back panel 12 .

The stock solution of the foam insulation material 11c injected from the injection port 14 flows into the entire space between the outer box 11a and the inner box 11b from there, and then foams toward the back panel 12, whereby the outer box 11a and the inner box 11b The space between is filled with the foam heat insulating material 11c. In this way, as shown in FIG. 3, the space between the outer case 11a and the inner case 11b is filled with the foam heat insulating material 11c.

At this time, the vacuum heat insulating material 15 described later is temporarily fixed on the inner side of the outer box 11a by hot melt adhesive or sealing material, etc., and fixed on the inner side of the outer box 11a by foaming and filling the foam heat insulating material 11c. And the foam heat insulating material 11c side. Moreover, the several recessed part 15a is provided in the vacuum heat insulating material 15. As shown in FIG.

In addition, as for the foam heat insulating material 11c such as urethane foam, the strength becomes stronger by increasing the density, but the heat insulating performance decreases, and conversely, the heat insulating performance becomes high by reducing the density, but the strength decreases.

The back panel 12 and the side panels 13 constituting the outer box 11a are respectively made of iron plates with a thickness of about 0.3-0.5mm. In addition, on the back panel 12 and the side panel 13, heat radiation pipes 22 functioning as condensers are arranged at intervals W1 (see FIG. 5 described later). Those heat pipes 22 are respectively fixed to the back panel 12 and the side panel 13 by means of aluminum bands or the like. The heat pipe 22 is made of, for example, a copper pipe, and its diameter is about 4.0-5.0 mm.

On the front opening side of the outer case 11a, an outer case side curved portion 11a1 and a flange portion 11a2 are provided, and on the front opening side of the inner case 11b, an inner case side curved portion 11b1 curved outward is provided. Then, the outer box-side curved portion 11a1 is elastically deformed, and the inner box-side curved portion 11b1 is sandwiched between the outer box-side curved portion 11a1 and the flange portion 11a2, whereby the inner box 11b is attached to the outer box 11a.

Fig. 4 is a schematic view showing a state in which heat radiation pipes 22 are attached to vacuum heat insulating material 15 of refrigerator 100 according to the embodiment. Fig. 5 is a cross-sectional arrow view of A-A of Fig. 4 . The vacuum heat insulating material 15 has a rectangular shape and is provided on the back panel 12 and the side panels 13 on the left and right, respectively. Here, the vacuum heat insulating material 15 is provided with a plurality of recessed parts 15a as shown in FIG. 4, and the heat radiation pipe 22 is arrange|positioned in each recessed part 15a. That is, the concave portion 15 a is provided for accommodating the heat radiation pipe 22 . Moreover, as shown in FIG. 5, the recessed part 15a is provided in plural at intervals W1 in the short side direction of the vacuum heat insulating material 15. As shown in FIG. Here, W1 is the distance between the centers of adjacent recesses 15a. Moreover, each recessed part 15a is provided so that it may extend in the longitudinal direction of the vacuum heat insulating material 15, as shown in FIG.

Also, as shown in FIG. 5 , the concave portion 15 a has a concave shape having standing wall portions (not shown) on the left and right sides in order to cover the heat radiation pipe 22 . Moreover, the depth D1 of the concave portion 15a is about 5mm, and the width W2 of the concave portion 15a is about 40-70mm. That is, the width dimension W2 of the concave portion 15a is determined even if there are manufacturing errors in forming the concave portion 15a, installation errors when the vacuum heat insulating material 15 is mounted on the side panel 13, bending of the heat radiation pipe 22 on the side panel 13, or heat dissipation. The mounting error etc. of the pipe 22 against the side panel 13 also becomes the size that can accommodate the heat radiation pipe 22 . In addition, the depth D1 of the concave portion 15a is to prevent the heat pipe 22 from being pressed against the side panel 13 when the vacuum heat insulating material 15 is installed on the side panel 13, so as to avoid remaining traces of being pressed against the side panel 13 or 15, the outer packaging material (not shown) is damaged, and becomes larger than the diameter of the heat radiation pipe 22, for example, 5.0 mm.

The vacuum heat insulating material 15 is attached to the back panel 12 and the side panel 13 by using melt adhesive or a sealing material, etc., in a state where the heat radiation pipes 22 are arranged in the respective recesses 15a.

The foam heat insulating material 11c is filled in the space between the outer case 11a and the inner case 11b after the vacuum heat insulating material 15 is attached to the back panel 12 and the side panel 13. Therefore, the installation of the vacuum insulation material 15 on the back panel 12 and the side panel 13 needs to prevent the foam insulation material 11c from immersing between the back panel 12 and the vacuum insulation material 15 or between the side panel 13 and the vacuum insulation material 15. in an in-between manner.

Fig. 6 is a schematic side view of the first longitudinal section of the refrigerator 100 according to the embodiment. Fig. 7 is a schematic side view of the second longitudinal section of the refrigerator 100 according to the embodiment. Fig. 8 is a view of the internal structure of refrigerator 100 according to the embodiment viewed from the back side. In addition, the arrows in FIG. 6 and FIG. 8 indicate the flow direction of cold air. Also, the second longitudinal section in FIG. 7 is a section at a position shifted outward in the lateral width direction from the position of the first longitudinal section in FIG. 6 .

As shown in Figures 6 to 8, a cooling chamber 16 is formed inside the inner box 11b and behind the storage rooms such as the vegetable room 4, and the storage rooms such as the vegetable room 4 and the cooling room 16 are made of synthetic resin. The first partition body 60 and the second partition body 68 constituted by manufactured plates or the like are divided. The second partition body 68 is disposed behind the first partition body 60 . Between the first partition body 60 and the second partition body 68 and below those partition bodies, a supply air passage 69a and return air passages 43a to 43e described later are formed.

Also, inside the cooling chamber 16, a cooler 50 which is an evaporator for cooling the air circulating in the refrigerator 100 is provided. Also, inside the inner box 11b and behind the refrigerator compartment 1, a supply air path 69b is formed, and the refrigerator compartment 1 and the supply air path 69b utilize a third partition body 80 constituted by a plate or the like made of synthetic resin. divided. Moreover, the refrigerating room 1, the ice making room 2, and the 1st freezing room 3 are partitioned by the partition wall 21 comprised with the plate of a heat insulating material, etc. FIG.

In the first partition body 60 and the second partition body 68, an air blower 61 is formed in the upper part thereof, and a blower 62 such as an axial fan is provided near the rear side of the air blower 61. Also, in the first partition body 60 , a plurality of outlets 63 and a plurality of return ports 28 are formed. Furthermore, the return port 28 is also formed under the first partition body 60 and the second partition body 68 . In the third partition body 80, a plurality of outlets 81 are formed. Then, the air cooled by the cooling chamber 16 is blown out from the air outlets 63 and 81 to the respective storage chambers. Moreover, in the partition wall 21, the return opening 82 and the return air path 67b are formed.

In addition, as shown in FIG. 8, the return air passage 43a is formed at a position lower than the cooler 50, the return air passage 43b is formed at a lower right position than the cooler 50, and the return air passage 43c is formed by The return air passage 43d is formed at a position opposite to the right side of the cooler 50 , and the return air passage 43e is formed at a lower left side than the cooler 50 .

Then, the air blower 62 is rotationally driven to supply the cool air in the cooling room 16 to each storage room through the supply air passages 69a, 69b and the air outlets 63, 81 . Furthermore, the cold air supplied to each storage chamber is cooled to each storage chamber, and then returns to the cooling chamber 16 through the return ports 28, 82, the return air passage 67b, and the return air passages 43a-43e. In this way, each storage room is maintained at a predetermined temperature.

Specifically, cold air is supplied to the second freezer compartment 5 through the supply air passage 69 a and the plurality of outlets 63 formed in the first partition body 60 . Moreover, the cold air that flows in the second freezing chamber 5 and has cooled the second freezing chamber 5 passes through the return air passage from the return air outlet 28 formed under the first partition body 60 and the second partition body 68 . 43a returns to the cooling chamber 16 .

Similarly, cold air is supplied to the refrigerator compartment 1 through the supply air passages 69a, 69b and the plurality of outlets 81 formed in the third partition body 80 . Moreover, the cool air flowing in the refrigerator compartment 1 and having cooled the refrigerator compartment 1 flows back to the cooling compartment 16 through the return air passage 43b from the return opening 82 formed in the partition wall 21 which is the floor surface of the refrigerator compartment 1 .

Similarly, cold air is supplied to the ice making compartment 2 through the air supply passage 69 a and the plurality of outlets 63 formed in the first partition body 60 . And the cool air which flows in the ice making compartment 2 and has cooled the inside of the ice making compartment 2 returns to the cooling compartment 16 through the return air path 43c from the return opening 28 formed in the 1st partition body 60. As shown in FIG.

Similarly, cold air is supplied to the first freezer compartment 3 through the air supply passage 69 a and the plurality of outlets 63 formed in the first partition body 60 . And the cool air which flows in the first freezing compartment 3 and has cooled the first freezing compartment 3 returns to the cooling compartment 16 through the return air passage 43d from the return opening 28 formed in the first partition body 60 .

Similarly, cold air is supplied to the vegetable compartment 4 through the air supply passage 69 a and the plurality of outlets 63 formed in the first partition body 60 . And the cold air which flows in the vegetable compartment 4 and has cooled the vegetable compartment 4 returns to the cooling chamber 16 through the return air path 43e from the return opening 28 formed in the 1st partition body 60. As shown in FIG.

The cooler 50 is connected to the compressor 18, radiator (not shown), capillary tube (not shown) or expansion valve (not shown) provided at the lower rear of the refrigerator 100 through refrigerant piping (not shown), A vapor compression refrigeration cycle is formed. In addition, in the refrigerating cycle circuit, refrigerant such as isobutane (R600a) or the like is filled to circulate in the circuit. In addition, the type of refrigerant is not limited to isobutane (R600a).

Fig. 9 is a perspective view showing cooler 50 of refrigerator 100 according to the embodiment. As shown in FIG. 9 , the cooler 50 includes: a plurality of sheet-shaped cooling fins 52 stacked at predetermined intervals; In addition, cool air is produced by exchanging heat between the refrigerant flowing through the heat transfer pipe 51 and the air in the cooling chamber 16 .

As shown in FIGS. 6 and 7 , a control device 20 is provided on the upper rear of the refrigerator 100 . The control device 20 is, for example, composed of dedicated hardware, or a CPU (Central Processing Unit, also known as a central processing unit, processing device, computing device, microprocessor, microcomputer, processor) that executes a program stored in a memory unit. . Furthermore, the control device 20 executes predetermined arithmetic processing based on input values from sensors (not shown) such as a temperature sensor, and controls each constituent device such as the compressor 18 and the blower 62 .

In addition, a defroster 17 is provided around the cooler 50 . The defrosting device 17 heats the cooler 50 by being energized during the defrosting operation, and removes frost adhering to the cooler 50 . The defrosting device 17 includes a closed glass tube heater (hereinafter also referred to as a main heater) 40 and an auxiliary heater 41 . The glass tube heater 40 is arranged in the region where the return air passages 43 a to 43 e flow together and below the cooler 50 . In addition, the auxiliary heater 41 is arranged in close contact with the inner box 11 b outside the cooling chamber 16 and behind the cooler 50 , and is electrically connected in parallel with the glass tube heater 40 . In addition, the auxiliary heater 41 may not be electrically connected in parallel with the glass tube heater 40 , but may be electrically independent from the glass tube heater 40 . The control device 20 removes frost adhering to the cooler 50 by energizing the glass tube heater 40 and the auxiliary heater 41 during the defrosting operation. At this time, because the auxiliary heater 41 is electrically connected in parallel with the glass tube heater 40 or electrically independent, the control device 20 can individually control the glass tube heater 40 and the auxiliary heater 40 during the defrosting operation. Heater 41. Moreover, the glass tube heater 40 is, for example, an electrothermal type, and has a structure in which a heater wire is arranged in a near-vacuum glass tube or a glass tube filled with fluorinated gas. In addition, the glass tube heater 40 can be replaced with other types of heaters.

Fig. 10 is a diagram showing auxiliary heater 41 of defroster 17 of refrigerator 100 according to the embodiment. In addition, the dotted line in FIG. 10 represents the cooler 50 . As shown in FIG. 10 , the auxiliary heater 41 is a wire heater, and includes a heat conduction sheet 42 and a heating wire 43 wired on the surface of the heat conduction sheet 42 . The heat conduction sheet 42 is a plate-like or foil-like heat conductor made of metal such as aluminum, and has an area covering at least the back surface of the cooler 50 . By making the heat conduction sheet 42 made of metal such as aluminum, for example, since it has higher thermal conductivity than that made of resin, the heat generated from the defrosting device 17 can be quickly transferred to the cooler 50, and it can be performed efficiently. Defrosting of cooler 50 . Also, the heating wires 43 are wired so as to be folded several times in the left-right direction while becoming longer, and the density of the heating wires 43 can be adjusted by adjusting the interval between the heating wires 43 . In the embodiment, the separation distance L1 between the heating wires 43 is shortened from the lower end side of the cooler 50 to the upper side of the upper and lower center CL, and the heating wires 43 are wired so as to be folded several times in the left-right direction while becoming larger. As a result, a region where the heating wire 43 is closely wired is formed. On the other hand, from the upper side to the upper end side of the cooler 50 than the upper and lower center CL, the separation distance L2 between the heating wires 43 is lengthened and the separation distance L3 between the heating wires 43 is only partially shortened, and the heating wires are separated. 43 is folded back in the left and right direction while wiring, thereby forming a region where the heating wires 43 are sparsely and densely wired.

According to such a wiring structure of the heating wires 43, a high temperature state can be generated by making the heating wires 43 closely spaced, and a low temperature state can be generated by making the heating wires 43 sparsely spaced. Therefore, by optimizing the interval between the heating wire 43 at the place where frost is easily deposited and the place where frost is difficult to deposit in the cooler 50, excessive heating can be prevented.

The back surface of the heat conduction sheet 42 is fixed in close contact with the rear inner box 11b of the cooling chamber 16 shown in FIGS. 6 and 7 through an aluminum tape or the like. Furthermore, the heat transfer sheet 42 is arranged between the inner case 11b and the outer case 11a, and is pushed toward the inner case 11b by the foam heat insulating material 11c, so that the entire surface of the heat transfer sheet 42 is in close contact with the inner case 11b. With this structure, the heat conduction sheet 42 is not directly exposed to the cool air in the cooling chamber 16, and hardly deteriorates due to temperature changes in the cooling chamber 16, etc., and can generate heat in a stable state for a long time. In addition, during the defrosting operation, the entire cooler 50 can be reliably heated, and the defrosting efficiency can be improved. Also, the thermally conductive sheet 42 is physically fixed by a foam heat insulating material 11c such as hardened urethane foam. With this structure, the thermally conductive sheet 42 is difficult to peel off from the inner case 11b, and since it generates heat for a long period of time in a stable state, it is possible to reliably heat the target portion of the cooler 50 during the defrosting operation.

Fig. 11 is a longitudinal sectional view of the periphery of the cooler 50 of the refrigerator 100 according to the embodiment. FIG. 12 is a diagram showing a frosted state of the cooler 50 in FIG. 11 . As shown in FIG. 11 , a dew drip tray 65 is provided below the cooler 50 . The dew water retainer 65 temporarily stores the defrosting water produced by melting the frost during the defrosting operation, and the frost in the state of ice cubes may fall from the cooler 50 . Then, the defrosting water stored in the dew holding pan 65 is guided to the evaporation pan (not shown) through the drain pipe 66 .

As shown above, the glass tube heater 40 is arranged in the area where the return air passages 43a~43e converge and below the cooler 50, and the auxiliary heater 41 is located outside the cooling chamber 16 and behind the cooler 50. The inner box 11b is configured in a closely connected state.

In the refrigerator 100 of the embodiment, as shown in FIG. 8 , the feature is that the supply air passage 69a is formed on the upper side of the upper and lower center CL of the cooler 50, and the return air passages 43a~43e are formed at the upper and lower center CL of the cooler 50. underside. By forming the supply air passage 69 a and the return air passages 43 a to 43 e in this manner, the air in the cooling chamber 16 flows toward the cooler 50 from bottom to top.

Therefore, as shown in FIG. 12 , the frost starts to adhere from the back surface 50 a of the cooler 50 , and the frost tends to grow gradually in the order of the lower part 50 b of the cooler 50 , the central part of the cooler 50 , and the upper part of the cooler 50 . .

As shown above, the auxiliary heater 41 includes the heat conduction sheet 42 and the heating wire 43 wired on the surface of the heat conduction sheet 42 . The heat conduction sheet 42 has an area covering at least the entire rear surface of the cooler 50 . Moreover, the heating wire 43 is wired to the thermally conductive sheet 42 from the vicinity of the upper end to the vicinity of the lower end. Furthermore, all the heating wires 43 have the same thickness, and the resistance value per unit length is also the same. By wiring while adjusting the length of the heating wire 43, the surface temperature of the heat conducting sheet 42 in the wiring area can be adjusted.

Moreover, according to the heating method of the defroster 17 of the embodiment, the auxiliary heater 41 compensates for the lack of heating by the glass tube heater 40 from the back side of the cooler 50 . Furthermore, by making the sealed glass tube heater 40 and the auxiliary heater 41 individually controllable, the auxiliary heater 41 is properly heated and the cooler 50 is defrosted, whereby the frost can be efficiently removed. Melting can shorten the defrosting time of the glass tube heater 40. Furthermore, since the glass tube heater 40 is prevented from being maintained at a high temperature, power consumption can be reduced and energy saving can be improved.

Specifically, excessive heating is prevented by setting the conditions for energizing the auxiliary heater 41 . For example, if a large amount of frost adheres to the periphery of the cooler 50, it is assumed that the number of times the door is opened and closed is large, so only when the door is opened and closed more than a predetermined number of times, the closed glass tube heater 40 and Both sides of the auxiliary heater 41 are energized.

In addition, when the door is opened for a long time due to the door being kept open, it is assumed that a large amount of frost adheres to the cooler 50 . Therefore, for example, when the temperature difference between the temperature in the refrigerator and the cooling chamber 16 becomes more than a certain value, both the closed glass tube heater 40 and the auxiliary heater 41 are energized.

In addition to the above, a certain energization condition is added, and the closed glass tube heater 40 and the auxiliary heater 41 are energized according to the situation, and only the closed glass tube heater 40 is energized, or only the heater 41 is energized. By conducting electricity, high-efficiency heating can be performed.

In addition, in the embodiment, the heat conduction sheet 42 covers the entire back surface of the cooler 50, and the heating wire 43 is wired to the heat conduction sheet 42 from the vicinity of the upper end to the vicinity of the lower end, but it is not limited to this. Those systems can also undergo design changes as needed.

Fig. 13 is a longitudinal sectional view illustrating a modified example of the schematic structure of the auxiliary heater 41 of the defrosting device 17 of the refrigerator 100 according to the embodiment. In addition, in the modified examples described below, the arrangement area of the auxiliary heater 41 is different, but since the components and their configurations are the same as the previous ones, the same symbols are used for description, and the repeated description is omitted. .

The heat conduction sheet 42 of the auxiliary heater 41 is arranged so as to cover at least the back surface of the cooler 50 shown in FIG. 13 from the lower end side to the upper and lower center CL. By arranging the heat conduction sheet 42 in this way, the heat conduction sheet 42 will not be directly exposed to cold air in the cooling chamber 16, and it is difficult to deteriorate due to temperature changes in the cooling chamber 16, etc., and can generate heat in a stable state for a long time. In addition, air convection is generated in the cooling chamber 16 during the defrosting operation, thereby suppressing an increase in the surface temperature of the main heater 40 .

Fig. 14 is a diagram showing the shape of the cooling fins 52 of the cooler 50 of the refrigerator 100 according to the embodiment. Fig. 15 is a diagram showing a modified example of the shape of the cooling fins 52 of the cooler 50 of the refrigerator 100 according to the embodiment.

In this manner, the shape of the cooling fins 52 of the cooler 50 is not limited to the quadrangular shape shown in FIG. 14 , but may also be a polygonal shape as shown in FIG. 15 .

In the embodiment, the case where the auxiliary heater 41 of the defrosting device 17 is arranged in close contact with the inner box 11b outside the cooling chamber 16 and behind the cooler 50 is described, but it is not limited to this. For example, the auxiliary heater 41 may be arranged inside the cooling chamber 16 and behind the cooler 50 . In addition, various changes can be implemented without departing from the scope of the present disclosure.

As mentioned above, the refrigerator 100 of the embodiment includes: a heat-insulating box body 11, which is provided with a storage room and a cooling room 16 inside; a cooler 50, which is arranged in the cooling room 16, and cools the air supplied to the storage room; The defrosting device 17 is to remove the frost attached to the cooler 50; and the control device 20 is to control the defrosting device 17 during the defrosting operation; The auxiliary heater 41 is electrically connected in parallel or electrically independent. The control device 20 can individually control the main heater 40 and the auxiliary heater 41 during the defrosting operation.

According to the refrigerator 100 of the embodiment, the defrosting device 17 has a main heater 40 and an auxiliary heater 41 electrically connected in parallel with the main heater 40 or electrically independent, and the control device 20 is in the defrosting operation. , the main heater 40 and the auxiliary heater 41 are individually controlled. Therefore, in the case of melting a small amount of frost, only one heater can be operated, and energy saving can be improved.

Moreover, in the refrigerator 100 of the embodiment, the main heater 40 is arranged below the cooler 50 , and the auxiliary heater 41 is arranged on the back side of the cooler 50 .

According to the refrigerator 100 of the embodiment, when the amount of frost attached to the cooler 50 is small at the initial stage of operation of the refrigerator 100, only the auxiliary heater 41 arranged on the back side of the cooler 50 is operated to cool the cooler 50. The frost of container 50 melts. By doing so, it is possible to suppress the clogging caused by the frost adhering to the cooler 50 , and reduce the number of operations or the operating time of the main heater 40 disposed below the cooler 50 . In addition, a small amount of frost on the upper part of the cooler 50 which is hard to melt by the main heater 40 arranged below the cooler 50 can also be melted by the auxiliary heater 41, thereby improving the defrosting efficiency.

Here, when the inner box 11b of the refrigerator 100 is made of a thin hard resin such as ABS resin, the heater temperature needs to be suppressed to 100° C. or lower than the heat-resistant temperature of the material of the inner box 11b, and it is not desirable to make the heater high. Therefore, in the refrigerator 100 of the embodiment, during the defrosting operation, by individually controlling the main heater 40 and the auxiliary heater 41, it is possible to suppress the heater from becoming high temperature.

In addition, in the refrigerator 100 according to the embodiment, the heat-insulating box 11 has an outer box 11a constituting the outer shell, and an inner box 11b arranged inside the outer box 11a, and the heat conduction sheet 42 is arranged outside the cooling chamber 16. At the same time, the entire back surface of the cooler 50 is covered, and the back surface is in contact with the inner box 11b of the heat insulating box 11, and is pasted.

According to the refrigerator 100 of the embodiment, the heat conduction sheet 42 is not directly exposed to cold air in the cooling chamber 16, and is difficult to deteriorate due to temperature changes in the cooling chamber 16, and can generate heat in a stable state for a long time. In addition, during the defrosting operation, the entire cooler 50 can be reliably heated, and the defrosting efficiency can be improved.

In the refrigerator 100 of the embodiment, the heat insulation box body 11 has an outer box 11a constituting the outer shell, and an inner box 11b arranged inside the outer box 11a, and the heat conducting sheet 42 is arranged outside the cooling chamber 16 and covers the outer box 11a at the same time. The back surface of the cooler 50 from the lower end side to the upper and lower center CL is bonded in a state where the back surface is in contact with the inner box 11b of the heat insulating box 11 .

According to the refrigerator 100 of the embodiment, the heat conduction sheet 42 is not directly exposed to cold air in the cooling chamber 16, and is difficult to deteriorate due to temperature changes in the cooling chamber 16, and can generate heat in a stable state for a long time. In addition, air convection is generated in the cooling chamber 16 during the defrosting operation, thereby suppressing an increase in the surface temperature of the main heater 40 .

1: Refrigerator 2: ice making room 3: The first freezer 4: Vegetable room 5: The second freezer 6a: Left door of refrigerator compartment 6b: Right door of refrigerator compartment 7:Pull-out door 8:Pull-out door 9:Pull-out door 10:Pull-out door 11: Insulation box 11a: Outer box 11a1: Bending part on outer box side 11a2: flange part 11b: inner box 11b1: Inner box side bending part 11c: Foam insulation 12: Back panel 13: Side panel 14: Injection port 15: Vacuum insulation 15a: concave part 16: Cooling room 17:Defrosting device 18: Compressor 20: Control device 21: partition wall 22: Radiation pipe

28: return port

40: glass tube heater (main heater)

41: Auxiliary heater

42: Heat conduction sheet

43: Heating wire

43a: Back to Wind Road

43b: Back to Wind Road

43c: Back to Wind Road

43d: return wind road

43e: Back to Wind Road

50: Cooler

50a: back part

50b: lower part

51: heat pipe

52: heat sink

60: The first spacer

61: air outlet

62: blower

63: Blow outlet

65: dew support plate

66: drain pipe

67b: Return air path

68: The second spacer

69a: Air supply path

69b: Air supply path 80: The third spacer 81: Blow outlet 82: return port 100: Refrigerator

[FIG. 1] It is the perspective view which looked at the refrigerator of embodiment from the front. [ Fig. 2 ] It is a perspective view of the state in which the back panel of the refrigerator according to the embodiment is turned upward. [FIG. 3] It is the plan view of the horizontal section of the refrigerator of embodiment. [FIG. 4] It is a schematic diagram which shows the state which attached the heat radiation pipe to the vacuum insulation material of the refrigerator of embodiment. [Fig. 5] It is a cross-sectional arrow view of A-A in Fig. 4. [ Fig. 6 ] It is a side view schematic diagram of the first longitudinal section of the refrigerator of the embodiment. [FIG. 7] It is the side view schematic diagram of the 2nd longitudinal section of the refrigerator of embodiment. [FIG. 8] It is the figure which looked at the internal structure of the refrigerator of embodiment from the back side. [FIG. 9] It is a perspective view which shows the cooler of the refrigerator of embodiment. [FIG. 10] It is a figure which shows the auxiliary heater of the defroster of the refrigerator of embodiment. [FIG. 11] It is a vertical cross-sectional view around the cooler of the refrigerator of embodiment. [FIG. 12] FIG. 11 is a diagram showing a frosted state of the cooler. [FIG. 13] It is a longitudinal cross-sectional view explaining the modified example of the schematic structure of the auxiliary heater of the defroster of the refrigerator of embodiment. [FIG. 14] It is a figure which shows the shape of the cooling fin of the cooler of the refrigerator concerning embodiment. [FIG. 15] It is a figure which shows the modification of the shape of the fin of the cooler of the refrigerator concerning embodiment.

1: Refrigerator

2: ice making room

4: Vegetable Room

5: The second freezer

6a: Left door of refrigerator compartment

7:Pull-out door

9:Pull-out door

10:Pull-out door

11a: Outer box

11b: inner box

11c: Foam insulation

12: Back panel

15: Vacuum insulation

16: Cooling room

17:Defrosting device

18: Compressor

20: Control device

21: partition wall

28: return port

40: glass tube heater (main heater)

41: Auxiliary heater

43a: Back to Wind Road

50: Cooler

60: The first spacer

62: blower

63: Blow outlet

67b: Return air path

68: The second spacer

69a: Air supply path

69b: Air supply path

80: The third spacer

81: Blow outlet

82: return port

Claims (9)

A refrigerator, which is: include: The heat insulation box is equipped with a storage room and a cooling room inside, and a door that closes the front opening of the storage room to open and close freely; A cooler is arranged in the cooling room and cools the air supplied to the storage room; a defrosting device for removing frost adhering to the cooler; and a control device for controlling the defrosting device during defrosting operation; The defrosting device has a main heater and an auxiliary heater electrically connected in parallel with the main heater or electrically independent; The control device controls the main heater and the auxiliary heater individually during a defrosting operation, and energizes both the main heater and the auxiliary heater when the door is opened and closed a predetermined number of times or more. Such as the refrigerator of claim item 1, wherein The main heater is arranged below the cooler; The auxiliary heater is arranged on the back side of the cooler. As the refrigerator of claim 1 or 2, wherein the main heater is a closed glass tube heater. Such as the refrigerator of claim item 1 or 2, wherein The auxiliary heater system has: heat conducting sheet; and The heating wire is wired on the surface of the heat conducting sheet. Such as the refrigerator of claim item 4, wherein The thermal barrier system has: the outer box forming the outline; and The inner box is arranged inside the outer box; The heat conduction sheet is arranged outside the cooling chamber, covers the entire back of the cooler, and is pasted in a state where the back is in contact with the inner box of the heat-insulating box. Such as the refrigerator of claim item 4, wherein The thermal barrier system has: the outer box forming the outline; and The inner box is arranged inside the outer box; The heat conduction sheet is arranged outside the cooling chamber, covers the back side of the cooler from the lower end side to the upper and lower center, and is pasted in a state where the back side is in contact with the inner box of the heat insulation box. As the refrigerator of claim 4, wherein the heat conducting sheet is made of aluminum. Such as the refrigerator of claim item 1 or 2, wherein A plurality of storage rooms are arranged inside the heat-insulated box; one of the storage rooms is a freezing room; Inside and on the back side of the heat-insulated box, there are provided: a plurality of air outlets for blowing out the air cooled in the cooling chamber to each of the storage chambers; and a plurality of return air passages for cooling each of the storage chambers The subsequent air flows back into the cooling chamber; The return air path of the freezer is located on the lower side than the cooler. A refrigerator, which is: include: The heat insulation box is equipped with a storage room and a cooling room inside; A cooler is arranged in the cooling room and cools the air supplied to the storage room; a defrosting device for removing frost adhering to the cooler; and a control device for controlling the defrosting device during defrosting operation; The defrosting device has a main heater and an auxiliary heater electrically connected in parallel with the main heater or electrically independent; The control device controls the main heater and the auxiliary heater individually during the defrosting operation, and when the temperature difference between the storage room and the cooling room becomes a constant value or more, the main heater and the auxiliary heater are controlled separately. Both sides of the auxiliary heater are energized.

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