TW202132736A - refrigerator - Google Patents

Abstract

A refrigerator comprising: an insulated box body in which a storage compartment and a cooling compartment are provided; a cooler which is disposed inside the cooling compartment and which cools air to be supplied to the storage compartment; a defrosting device which removes frost attached to the cooler; and a control device which controls the defrosting device during defrosting operation, wherein the defrosting device has a main heater and an auxiliary heater that is either electrically connected in parallel to the main heater or electrically independent of the main heater, and the control device controls the main heater and the auxiliary heater individually during defrosting operation.

Description

refrigerator

This disclosure relates to a refrigerator with a defrosting device.

Conventionally, a refrigerator with a defrosting device has been disclosed (for example, refer to Patent Document 1). The refrigerator in Patent Document 1 includes a closed glass tube heater as a defrosting device, which is arranged under the cooler; and an auxiliary heater, which is a wire heater arranged on the back side of the cooler. [Prior Patent Document] [Patent Literature]

[Patent Document 1] Japanese Patent Application Publication No. 2019-113296

[The problem to be solved by the invention]

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. Therefore, the glass tube heater and the auxiliary heater cannot be operated separately, and the heaters of both are operated even when a small amount of frost is melted. As a result, there is a problem of consuming more power than necessary.

The present disclosure was developed to solve the above-mentioned problems, and its purpose is to provide a refrigerator with improved energy saving. [Means to solve the problem]

The refrigerator of the present disclosure includes: a heat-insulating box, which is provided with a storage room and a cooling room; a cooler, which is arranged in the cooling room and cools the air supplied to the storage room; and a defrosting device, which removes The frost attached to the cooler; and a control device that controls the defrosting device during defrosting operation; the defrosting device has a main heater, and is electrically connected in parallel or electrically in parallel with the main heater Independent auxiliary heater; the control device individually controls the main heater and the auxiliary heater during defrosting operation. [Effects of Invention]

According to the refrigerator of the present disclosure, the defrosting device has a main heater and an auxiliary heater electrically connected in parallel or electrically independent of the main heater, and the control device is individually controlled during the defrosting operation Main heater and auxiliary heater. Therefore, when a small amount of frost is melted, only one heater can be operated, which can improve energy saving.

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

Fig. 1 is a perspective view of the refrigerator 100 of the embodiment viewed from the front. Fig. 2 is a perspective view of a state where the back panel 12 of the refrigerator 100 of the embodiment is up. Fig. 3 is a plan view of a transverse section of the refrigerator 100 according to the embodiment.

Hereinafter, the structure of the refrigerator 100 of an embodiment is demonstrated. In the following description, for ease of understanding, terms such as "up", "down", "right", "left", "front", "rear", etc. indicating directions are appropriately used, but this is for illustration purposes. These terms do not limit the embodiment. In addition, in the embodiment, the refrigerator 100 is viewed face up, and "up", "down", "right", "left", "front", "rear", etc. are used.

As shown in FIGS. 1 to 3, the refrigerator 100 of the embodiment has a heat-insulating box 11, which has an opening on the front side, and a plurality of storage rooms are provided inside. This heat-insulating box 11 is configured to fill a space between an outer box 11a made of steel plate and an inner box 11b made of thin hard resin such as ABS resin with a foam insulation 11c such as urethane foam, and the outer box 11a constitutes an outer frame, and the inner box 11b is arranged inside the outer box 11a. In addition, the outer box 11a is composed of a back panel 12 and a side panel 13.

Inside the heat insulation box 11, as a storage room, a refrigerating room 1, an ice making room 2, a first freezing room 3, a vegetable room 4, and a second freezing room 5 are provided. The refrigerating compartment 1 is installed in 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-piece double-opening door is composed of the left door 6a of the refrigerating compartment and the right door 6b of the refrigerating compartment.

Below the refrigerating compartment 1, the ice making compartment 2 and the first freezing compartment 3 are arranged side by side. The ice making compartment 2 is pulled out toward the user when the pull-out door 7 is pulled out. The first freezing compartment 3 When the pull-out door 8 is pulled out, it is pulled out to the user's side. In addition, in the lowermost section of the refrigerator 100, a second freezer compartment 5 is provided, and above the second freezer compartment 5, a vegetable compartment 4 is provided. This vegetable compartment 4 is installed below the ice making compartment 2 and the first freezing compartment 3 arranged side by side on the left and right, and above the second freezing compartment 5. The vegetable compartment 4 and the second freezing compartment 5 are also configured to be pulled out to the user side when the pull-out doors 9 and 10 are pulled out, respectively. In addition, the arrangement system of each store room is not limited to the above-mentioned.

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 back panel 12 provided on the back 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 the plurality of injection ports 14 provided in the back panel 12.

The raw liquid 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 up by the foam insulation 11c. In this way, as shown in FIG. 3, the space between the outer box 11a and the inner box 11b is filled with a foam heat insulating material 11c.

At this time, the vacuum heat insulating material 15 described later is temporarily fixed to the inner side of the outer box 11a by hot melt glue or sealing material, and is fixed to the inner side of the outer box 11a by the foam filling of the foam heat insulating material 11c. And the foam insulation 11c side. In addition, the vacuum heat insulating material 15 is provided with a plurality of recesses 15a.

In addition, with regard to the foam insulation 11c such as urethane foam, by increasing the density, the strength becomes stronger, but the heat insulation performance is reduced. On the contrary, by reducing the density, the heat insulation performance becomes higher, but the strength is reduced.

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

On the front opening side of the outer box 11a, an outer box side curved portion 11a1 and a flange portion 11a2 are provided, and on the front opening side of the inner box 11b, an inner box side curved portion 11b1 that is bent outward is provided. Then, the outer box side curved portion 11a1 is elastically deformed, and the inner box side curved portion 11b1 is sandwiched by 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 diagram showing a state in which the heat dissipation pipe 22 is attached to the vacuum heat insulating material 15 of the refrigerator 100 of the embodiment. Figure 5 is a cross-sectional arrow view of Figure 4 AA. The vacuum heat insulating material 15 has a rectangular shape, and is provided on the back panel 12 and the left and right side panels 13, respectively. Here, the vacuum heat insulating material 15 is provided with a plurality of recesses 15a as shown in FIG. That is, the recessed portion 15a is provided to accommodate the heat dissipation pipe 22. Moreover, as shown in FIG. 5, the recessed part 15a is provided in the short side direction of the vacuum heat insulating material 15 at intervals W1 in plural numbers. Here, W1 is the distance between the centers of adjacent recesses 15a. Moreover, as shown in FIG. 4, 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.

Moreover, as shown in FIG. 5, the recessed part 15a is a recessed shape which has standing wall parts (not shown) on the left and right sides in order to cover the radiator tube 22. As shown in FIG. Moreover, the depth D1 of the recess 15a is about 5 mm, and the width dimension W2 of the recess 15a is about 40-70 mm. That is, the width dimension W2 of the recess 15a is due to the manufacturing error in forming the recess 15a, the installation error when the vacuum heat insulating material 15 is mounted on the side panel 13, the bending of the heat pipe 22 on the side panel 13, or the heat dissipation The installation error of the tube 22 to the side panel 13 also becomes a size that can accommodate the heat dissipation tube 22. In addition, the depth D1 of the recess 15a is when the vacuum heat insulating material 15 is installed on the side panel 13, the heat dissipation pipe 22 is pressed against the side panel 13, in order to avoid the traces of being pressed on the side panel 13, or the vacuum heat insulating material 15 The outer packaging material (not shown) is damaged and becomes a size larger than the diameter of the heat dissipation 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 using melt glue, a sealing material, etc., in the state where the radiating pipe 22 is arranged in each recessed part 15a.

The foam heat insulating material 11c is filled in the space between the outer box 11a and the inner box 11b after the vacuum heat insulating material 15 is mounted on the back panel 12 and the side panel 13. Therefore, it is necessary to install the vacuum insulation material 15 of the back panel 12 and the side panel 13 to prevent the foam insulation 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 Time.

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

As shown in Figures 6 to 8, inside the inner box 11b and behind the storage compartment of the vegetable compartment 4, a cooling compartment 16 is formed. The storage compartment and the cooling compartment 16 of the vegetable compartment 4 etc. are made of synthetic resin. The first partition body 60 and the second partition body 68 constituted by the manufactured board and the like are divided. The second partition body 68 is arranged 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.

In addition, inside the cooling chamber 16 is provided a cooler 50 which is an evaporator, and the cooler 50 is used to cool the air circulating in the refrigerator 100. In addition, inside the inner box 11b and behind the refrigerating compartment 1, a supply air passage 69b is formed, and the refrigerating compartment 1 and the supply air passage 69b use a third partition 80 composed of a plate made of synthetic resin or the like. Divide. In addition, the refrigerating compartment 1, the ice making compartment 2, and the first freezing compartment 3 are partitioned by a partition wall 21 composed of a plate of heat insulating material or the like.

In the first partition body 60 and the second partition body 68, an air blowing port 61 is formed on the upper part thereof, and a blower 62 such as an axial fan is provided near the rear side of the air blowing port 61. In addition, in the first partition body 60, a plurality of blowing ports 63 and a plurality of return ports 28 are formed. Furthermore, under the first partition body 60 and the second partition body 68, a return port 28 is also formed. In the third partition 80, a plurality of blowing ports 81 are formed. Then, the air cooled by the cooling chamber 16 is blown from the air outlets 63 and 81 to each storage room. In addition, in the partition 21, a return port 82 and a return air passage 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 It is formed at a position opposite to the left side of the cooler 50, 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 position than the cooler 50.

Furthermore, the air blower 62 is driven to rotate, and the cold air in the cooling chamber 16 is supplied to each storage chamber through the supply air passages 69a, 69b and the blowing ports 63, 81. Furthermore, the cold air supplied to each storage compartment is cooled in each storage compartment, and then flows back to the cooling chamber 16 through the return ports 28 and 82, the return air passage 67b, and the return air passages 43a to 43e. In this way, each storage compartment is kept at a predetermined temperature.

Specifically, to the second freezing compartment 5, cold air is supplied via the supply air passage 69a and the plurality of blowing ports 63 formed in the first partition body 60. In addition, the cold air flowing in the second freezing compartment 5 and having cooled the second freezing compartment 5 passes through the return air path from the return port 28 formed under the first partition 60 and the second partition 68 43a returns to the cooling chamber 16.

Similarly, cold air is supplied to the refrigerating compartment 1 through the supply air passages 69a and 69b and the plurality of blowing ports 81 formed in the third partition 80. Furthermore, the cold air flowing in the refrigerating compartment 1 and having cooled the inside of the refrigerating compartment 1 flows back to the refrigerating compartment 16 through the return air passage 43b from the return port 82 formed in the partition wall 21 which is the floor surface of the refrigerating compartment 1.

Similarly, the ice making chamber 2 is supplied with cold air through the supply air path 69a and the plurality of blowing ports 63 formed in the first partition body 60. Furthermore, the cold air flowing in the ice making compartment 2 and having cooled the inside of the ice making compartment 2 flows back to the cooling compartment 16 from the return port 28 formed in the first partition body 60 via the return air passage 43c.

Similarly, to the first freezing compartment 3, cold air is supplied via the supply air passage 69a and the plurality of blowing ports 63 formed in the first partition body 60. Furthermore, the cold air flowing in the first freezing compartment 3 and having cooled the inside of the first freezing compartment 3 flows back to the cooling compartment 16 from the return port 28 formed in the first partition 60 via the return air passage 43d.

Similarly, to the vegetable compartment 4, cold air is supplied via the supply air path 69a and the plurality of air outlets 63 formed in the first partition body 60. The cold air flowing in the vegetable compartment 4 and having cooled the inside of the vegetable compartment 4 flows back to the cooling compartment 16 from the return port 28 formed in the first partition body 60 via the return air passage 43e.

The cooler 50 is connected to a compressor 18, a radiator (not shown), a capillary tube (not shown) or an expansion valve (not shown) provided behind the lower part of the refrigerator 100 via a refrigerant pipe (not shown). It constitutes a vapor compression refrigeration cycle. In addition, the refrigeration cycle circuit is filled with a refrigerant such as isobutane (R600a) that circulates in the circuit. In addition, the type of refrigerant is not limited to isobutane (R600a).

Fig. 9 is a perspective view showing the cooler 50 of the refrigerator 100 according to the embodiment. As shown in FIG. 9, the cooler 50 includes a plurality of fins 52 in the shape of a thin plate, which are laminated at a predetermined interval, and a plurality of heat pipes 51 in the shape of a circular tube, which penetrate the fins 52 in the direction of the lamination. In addition, the refrigerant flowing through the heat transfer pipe 51 exchanges heat with the air in the cooling chamber 16 to thereby produce cold air.

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

In addition, a defrosting device 17 is provided around the cooler 50. The defrosting device 17 heats the cooler 50 by being energized during the defrosting operation, and removes the 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 below the cooler 50 in the area where the return air passages 43a to 43e converge. In addition, the auxiliary heater 41 is arranged in a state of being in close contact with the inner box 11 b on the outside of 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 of the glass tube heater 40. The control device 20 removes the 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 and the glass tube heater 40 are electrically connected in parallel or independently, the control device 20 can individually control the glass tube heater 40 and the auxiliary heater during the defrosting operation. Heater 41. In addition, the glass tube heater 40 is, for example, of an electric heating type, and has a structure in which a heater wire is arranged in a glass tube close to a vacuum or a glass tube filled with a fluorinated gas. In addition, the glass tube heater 40 can be replaced with other types of heaters.

Fig. 10 is a diagram showing the auxiliary heater 41 of the defrosting device 17 of the refrigerator 100 according to the embodiment. In addition, the broken line in FIG. 10 indicates the cooler 50. As shown in FIG. 10, the auxiliary heater 41 is a wire heater, and includes a heat conductive sheet 42 and a heating wire 43 wired on the surface of the heat conductive sheet 42. The thermal conductive sheet 42 is a plate-shaped or foil-shaped thermal conductor made of metal such as aluminum, and has an area covering at least the back surface of the cooler 50. By making the thermally conductive sheet 42 into a metal such as aluminum, it has higher thermal conductivity than a resin-made one. Therefore, the heat generated from the defroster 17 can be quickly transferred to the cooler 50, and it can be performed efficiently. Defrosting of cooler 50. In addition, the heating wires 43 are wired so as to be folded back several times in the left-right direction and become longer. By adjusting the interval of the heating wires 43, the density is adjusted. In the embodiment, from the lower end side of the cooler 50 to the upper side than the upper and lower center CL, the separation distance L1 between the heating wires 43 is shortened, and the heating wires 43 are wired so as to be folded back several times in the left and right directions. It is long, thereby forming an area where the heating wire 43 is closely wired. 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 made longer and only a part of the separation distance L3 between the heating wires 43 is shortened, and the heating wires 43 is folded back and wired in the left-right direction, thereby forming an area where the heating wires 43 are sparsely and densely wired.

According to this wiring structure of the heating wire 43, by making the interval of the heating wires 43 close, a high temperature state can be generated, and by making the interval of the heating wires 43 sparse, a low temperature state can be generated. Therefore, by optimizing the distance between the heating wires 43 at the frost-prone and hard-to-frost areas of the cooler 50, excessive heating can be prevented.

The heat conductive sheet 42 is fixed in a state in which the back surface of the heat conductive sheet 42 is in close contact with the inner box 11b behind the cooling chamber 16 shown in FIGS. 6 and 7 via an aluminum tape or the like. Furthermore, the thermally conductive sheet 42 is arranged between the inner box 11b and the outer box 11a, and is pressed toward the inner box 11b by the foam heat insulating material 11c, and the entire surface of the thermally conductive sheet 42 is in close contact with the inner box 11b. With this structure, the thermal conductive sheet 42 is not directly exposed to the cold air in the cooling chamber 16, and is hard to be deteriorated due to temperature changes in the cooling chamber 16, and can generate heat in a stable state for a long period of time. In addition, the entire cooler 50 can be surely heated during the defrosting operation, and the defrosting efficiency can be improved. In addition, the thermal conductive sheet 42 is physically fixed by a foam heat insulating material 11c such as a hardened urethane foam. With this structure, the thermal conductive sheet 42 is difficult to peel off from the inner box 11b, and since it generates heat for a long period of time in a stable state, the target area of the cooler 50 can be surely heated 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 the frosting state of the cooler 50 in FIG. 11. As shown in FIG. 11, below the cooler 50, a dew water holder 65 is provided. The defrosting tray 65 temporarily stores the defrosting water produced by melting the frost during the defrosting operation, and it is also possible that the frost in the state of ice may fall from the cooler 50. Then, the defrosting water system stored in the dew water holder 65 is guided to the evaporation pan (not shown) via the drain pipe 66.

As described above, the glass tube heater 40 is arranged in the area where the return air passages 43a to 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 arranged in a tightly connected state.

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

Therefore, as shown in FIG. 12, the frost system begins to adhere to the back part 50a of the cooler 50, and the frost gradually grows in the order of the lower part 50b of the cooler 50, the center part of the cooler 50, and the upper part of the cooler 50. .

As described above, the auxiliary heater 41 includes a thermal conductive sheet 42 and a heating wire 43 wired on the surface of the thermal conductive sheet 42. The thermally conductive sheet 42 has an area covering at least the entire back surface of the cooler 50. In addition, the heating wire 43 is wired to the heat 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 adjusting the length of the heating wire 43 while wiring, the surface temperature of the heat conducting sheet 42 in the wiring area can be adjusted.

Furthermore, 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 enclosed glass tube heater 40 and the auxiliary heater 41 individually controllable, the auxiliary heater 41 is appropriately heated, and the cooler 50 is defrosted, thereby making the frost more efficient. It melts, and the defrosting time of the glass tube heater 40 can be shortened. 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, by setting the conditions for energizing the auxiliary heater 41, excessive heating is prevented. For example, when a large amount of frost adheres to the periphery of the cooler 50, it is assumed that the door is opened and closed frequently. Therefore, only when the door is opened and closed more than a predetermined number of times, the closed glass tube heater 40 and Both the auxiliary heater 41 are energized.

In addition, it is also assumed that a large amount of frost adheres to the cooler 50 when the door opening time becomes longer due to the constant opening of the door. Therefore, for example, when the temperature difference between the temperature in the refrigerator and the cooling chamber 16 becomes a certain value or more, 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 according to the situation, both the enclosed glass tube heater 40 and the auxiliary heater 41 are energized, only the enclosed glass tube heater 40 is energized, or only the heater 41 is energized. By energizing, high-efficiency heating can be performed.

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

Fig. 13 is a longitudinal sectional view illustrating a modification 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 modification described below, the arrangement area of the auxiliary heater 41 is different. However, since each constituent element and its configuration are the same as the previous ones, the same reference numerals are used for description, and repeated descriptions are omitted. .

The heat conducting sheet 42 of the auxiliary heater 41 is arranged 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 thermal conductive sheet 42 in this manner, the thermal conductive sheet 42 will not be directly exposed to the cold air in the cooling chamber 16, and is unlikely to be degraded due to temperature changes in the cooling chamber 16, and can generate heat in a stable state for a long period of time. In addition, convection of air is generated in the cooling chamber 16 during the defrosting operation, and the increase in the surface temperature of the main heater 40 can be suppressed.

FIG. 14 is a diagram showing the shape of the heat sink 52 of the cooler 50 of the refrigerator 100 according to the embodiment. Fig. 15 is a diagram showing a modification of the shape of the heat sink 52 of the cooler 50 of the refrigerator 100 according to the embodiment.

In this way, the shape of the heat sink 52 of the cooler 50 is not limited to the quadrangular shape shown in FIG. 14, but may also be the polygonal shape shown in FIG. 15.

In addition, in the embodiment, the auxiliary heater 41 of the defrosting device 17 has been described in a state where the auxiliary heater 41 is arranged in close contact with the inner box 11b on the outside of the cooling chamber 16 and behind the cooler 50, 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 gist of the present disclosure.

As mentioned above, the refrigerator 100 of the embodiment includes: a heat-insulating box body 11 in which a storage room and a cooling room 16 are arranged; the cooler 50 is arranged in the cooling room 16 and cools the air supplied to the storage room; The defrosting device 17, which removes the frost attached to the cooler 50; and the control device 20, which controls the defrosting device 17 during the defrosting operation; the defrosting device 17 has a main heater 40 and is connected to the main heater 40. When the auxiliary heater 41 is electrically connected in parallel or independently, 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 which is electrically connected in parallel with the main heater 40 or is electrically independent, and the control device 20 is in defrosting operation At this time, the main heater 40 and the auxiliary heater 41 are individually controlled. Therefore, when a small amount of frost is melted, only one heater can be operated, which can improve energy saving.

In addition, 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 during the initial operation of the refrigerator 100, only the auxiliary heater 41 arranged on the back side of the cooler 50 can be operated to enable cooling. The frost of the device 50 melted. In this way, it is possible to suppress the disk fouling caused by the frost adhering to the cooler 50, and reduce the number of operations or the operation time of the main heater 40 arranged below the cooler 50. In addition, the small amount of frost on the upper part of the cooler 50 that is difficult to be melted by the main heater 40 arranged below the cooler 50 can also be melted by the auxiliary heater 41, so that the defrosting efficiency can be improved.

Here, when the inner box 11b of the refrigerator 100 is made of thin hard resin such as ABS resin, the heater temperature needs to be suppressed to 100°C or less of 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, the main heater 40 and the auxiliary heater 41 are individually controlled during the defrosting operation, so that the heater can be prevented from becoming high in temperature.

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

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

In the refrigerator 100 of the embodiment, the heat-insulating box 11 has an outer box 11a constituting an outer frame and an inner box 11b arranged inside the outer box 11a. The heat conducting sheet 42 is arranged on the outside of the cooling chamber 16 while covering The cooler 50 is pasted from the lower end side to the back surface of the upper and lower center CL, and the back surface is in contact with the inner box 11b of the heat insulation box 11.

According to the refrigerator 100 of the embodiment, the thermal conductive sheet 42 will not be directly exposed to the cold air in the cooling chamber 16, and is unlikely to be deteriorated due to temperature changes in the cooling chamber 16, and can generate heat in a stable state for a long period of time. In addition, convection of air is generated in the cooling chamber 16 during the defrosting operation, and the increase in the surface temperature of the main heater 40 can be suppressed.

1: Refrigerator 2: ice making room 3: The first freezer 4: Vegetable room 5: The second freezer 6a: The left door of the refrigerator compartment 6b: The right door of the refrigerator compartment 7: Pull-out door 8: Pull-out door 9: Pull-out door 10: Pull-out door 11: Heat insulation box 11a: Outer box 11a1: Outer box side bend 11a2: Flange 11b: inner box 11b1: Inner box side curved part 11c: Foam insulation 12: Back panel 13: side panel 14: Injection port 15: Vacuum insulation 15a: recess 16: Cooling room 17: Defroster 18: Compressor 20: control device 21: Partition 22: heat pipe 28: Return port 40: Glass tube heater 41: auxiliary heater 42: Thermal conductive sheet 43: electric hotline 43a: come back to the wind road 43b: Come back to the wind road 43c: come back to the wind road 43d: come back to the wind road 43e: come back to the wind road 50: cooler 50a: Back part 50b: lower part 51: heat pipe 52: heat sink 60: first partition 61: Air supply outlet 62: Blower 63: Blow Out 65: Dew Retainer 66: Drain pipe 67b: Return air path 68: second partition 69a: supply air path 69b: supply wind path 80: third partition 81: Blow Out 82: return port 100: refrigerator

[Fig. 1] It is a perspective view of the refrigerator of the embodiment viewed from the front. [Figure 2] It is a perspective view of a state where the back panel of the refrigerator of the embodiment is up. [Figure 3] It is a plan view of the horizontal section of the refrigerator of the embodiment. [Fig. 4] is a schematic diagram showing a state in which the radiator pipe is installed in the vacuum heat insulating material of the refrigerator of the embodiment. [Fig. 5] It is the arrow view of the AA section of Fig. 4. [Fig. 6] It is a schematic side view of the first longitudinal section of the refrigerator of the embodiment. [Fig. 7] It is a schematic side view of the second longitudinal section of the refrigerator of the embodiment. [Fig. 8] A view of the internal structure of the refrigerator of the embodiment viewed from the back side. [Fig. 9] A perspective view showing the cooler of the refrigerator according to the embodiment. [Fig. 10] A diagram showing the auxiliary heater of the defrosting device of the refrigerator according to the embodiment. [Fig. 11] It is a longitudinal sectional view of the periphery of the cooler of the refrigerator of the embodiment. [Figure 12] Figure 11 shows the frosting state of the cooler. [Fig. 13] A longitudinal sectional view illustrating a modification of the schematic structure of the auxiliary heater of the defrosting device of the refrigerator according to the embodiment. [Fig. 14] A diagram showing the shape of the fins of the cooler of the refrigerator according to the embodiment. [Fig. 15] A diagram showing a modification example of the shape of the heat sink of the cooler of the refrigerator according to the embodiment.

100: refrigerator

1: Refrigerator

2: ice making room

3: The first freezer

4: Vegetable room

5: The second freezer

6a: The left door of the refrigerator compartment

6b: The right door of the refrigerator compartment

7: Pull-out door

8: Pull-out door

9: Pull-out door

10: Pull-out door

11: Heat insulation box

Claims (9)

A kind of refrigerator, which is: include: The heat insulation box is equipped with a storage room and a cooling room inside, and is provided with a door that closes the front opening of the storage room to be freely open and close; The cooler is arranged in the cooling room and cools the air supplied to the storage room; Defrosting device, which removes the frost attached to the cooler; and The control device is to control 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 individually controls the main heater and the auxiliary heater during the 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 in claim 1, where The main heater is arranged below the cooler; The auxiliary heater is arranged on the back side of the cooler. Such as the refrigerator of claim 1 or 2, wherein the main heater is a closed glass tube heater. Such as the refrigerator of claim 1 or 2, where The auxiliary heater system has: Thermal conductive sheet; and The heating wire is wired on the surface of the thermal conductive sheet. Such as the refrigerator in claim 4, where The insulation box system has: The outer box constitutes the outer profile; and The inner box is arranged inside the outer box; The thermal conductive sheet is arranged on the outer side of the cooling chamber, while covering the entire back surface of the cooler, and is pasted in a state where the back surface is in contact with the inner box of the heat insulation box. Such as the refrigerator in claim 4, where The insulation box system has: The outer box constitutes the outer profile; and The inner box is arranged inside the outer box; The thermally conductive sheet is arranged on the outer side of the cooling chamber, while covering the back surface of the cooler from the lower end side to the upper and lower center, and is pasted in a state where the back surface is in contact with the inner box of the heat insulation box. Such as the refrigerator of claim 4, wherein the thermal conductive sheet is made of aluminum. Such as the refrigerator of claim 1 or 2, where A plurality of the storage rooms are arranged inside the heat insulation box; One of the storage rooms is a freezer; Inside and on the back side of the heat insulation box, there are provided: a plurality of blowing outlets to blow out the air cooled in the cooling chamber to each of the storage compartments; and a plurality of return air passages to cool each of the storage compartments The subsequent air flows back to the cooling chamber; The return air path of the freezer compartment is located below the cooler. A kind of refrigerator, which is: include: Insulation box, with storage room and cooling room inside; The cooler is arranged in the cooling room and cools the air supplied to the storage room; Defrosting device, which removes the frost attached to the cooler; and The control device is to control 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 individually controls the main heater and the auxiliary heater during the defrosting operation, and when the temperature difference between the storage chamber and the cooling chamber becomes more than a fixed value, the main heater and the auxiliary heater Both sides of the auxiliary heater are energized.

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