CN114761747A - Defrosting device and refrigerator comprising same - Google Patents
Defrosting device and refrigerator comprising same Download PDFInfo
- Publication number
- CN114761747A CN114761747A CN202080077687.2A CN202080077687A CN114761747A CN 114761747 A CN114761747 A CN 114761747A CN 202080077687 A CN202080077687 A CN 202080077687A CN 114761747 A CN114761747 A CN 114761747A
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- CN
- China
- Prior art keywords
- glass tube
- defrosting
- longitudinal direction
- roof portion
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010257 thawing Methods 0.000 title claims abstract description 107
- 239000011521 glass Substances 0.000 claims abstract description 147
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000002356 single layer Substances 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 9
- 230000008014 freezing Effects 0.000 description 9
- 238000007710 freezing Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
- F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
- F25D2321/144—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
- F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
- F25D2321/146—Collecting condense or defrost water; Removing condense or defrost water characterised by the pipes or pipe connections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/032—Heaters specially adapted for heating by radiation heating
Abstract
A defrosting apparatus (2) and a refrigerator including the defrosting apparatus (2), the defrosting apparatus (2) including a defrosting heater (10) having a heating element inside a single-walled glass tube (12); a roof (22) which is disposed above the glass tube (12), extends in the longitudinal direction of the glass tube (12), is formed from a metal sheet, and has an upwardly convex shape; a tray (30) which is disposed below the glass tube (12) and has an opening at the bottom; and a drain pipe (40) extending downward from the opening.
Description
The present invention relates to a defrosting device for removing frost from an evaporator of a refrigerator and a refrigerator including the same.
In order to defrost the evaporator, a defrosting apparatus including a glass tube heater under the evaporator is widely used. In such a refrigerator, it is necessary to make the temperature of the outer surface of the glass tube heater sufficiently lower than the flammable temperature of the solvent flowing in the evaporator. However, when the input power of the glass tube heater is reduced in order to reduce the outer surface temperature of the glass tube heater, sufficient defrosting performance may not be obtained. In particular, even if frost in the evaporator above is melted by natural convection heat transfer by the glass tube heater, water melted and dropped from the evaporator may be refrozen in a tray disposed below the glass tube heater.
In order to solve this problem, a defrosting device using a defrosting heater having a heating element in a double glass tube has been proposed (for example, see patent document 1). In the defrosting device described in patent document 1, by using the double glass tube, the frost re-frozen in the tray can be melted by applying sufficient heat even if the outer surface temperature of the glass tube heater is low.
Patent document 1: japanese patent laid-open No. 2004-198097.
[ problems to be solved by the invention ]
However, the glass tube heater including the double glass tube has a problem of high manufacturing cost, and there is a problem of high manufacturing cost of the defrosting device including the glass tube heater or the refrigerator including the defrosting device.
Disclosure of Invention
An object of the present invention is to solve the above-mentioned problems and to provide a defrosting device that can be manufactured at low cost and has a sufficient defrosting function, and a refrigerator including the defrosting device.
[ MEANS FOR SOLVING PROBLEMS ] to solve the problems
The defrosting apparatus of the present invention includes: a defrosting heater having a heating element in a single-layer glass tube whose cross section perpendicular to a longitudinal direction is circular; a top portion which is disposed above the glass tube, extends in a longitudinal direction of the glass tube, is formed of a metal thin plate, and has an upwardly convex shape; a tray disposed below the glass tube, extending in a longitudinal direction of the glass tube, and having an opening at a bottom thereof; and a drain pipe extending downward from the opening, wherein a top portion of the top portion is located on a vertical line passing through a substantial center of the glass tube in a cross section perpendicular to a longitudinal direction of the glass tube, the top portion is symmetrical with respect to the vertical line within at least a predetermined range on both sides of the vertical line, end regions on both sides of the top portion in the longitudinal direction are inclined downward in the cross section along the longitudinal direction of the glass tube including the vertical line so as to reflect radiant heat from a lower side downward, and the opening is located directly below the glass tube.
According to the present invention, the single-layer glass tube is used, so that the manufacturing cost of the device can be reduced. Even if the input power to the defrosting heater is suppressed in order to reduce the outer surface temperature of the glass tube, the radiation heat from the defrosting heater can be reflected toward the tray 30 by the roof portion to melt the frost in the tray. In particular, in a cross section perpendicular to the longitudinal direction of the glass tube, the upward convex shape of the roof portion is symmetrical with respect to a vertical line passing through the approximate center of the glass tube within at least a predetermined range on both sides of the vertical line, and further, in a cross section along the longitudinal direction of the glass tube including the vertical line, the upward convex shape of the roof portion is formed obliquely in end regions on both sides so as to reflect radiant heat from the lower side to the lower side. That is, the roof portion has a quadrangle shape to improve reflection. Thus, the radiant heat with small deviation or skew can be made incident on the tray to remove the main portion directly below the glass tube.
Further, the opening of the tray is located directly below the glass tube, and therefore, the radiant heat from the defrosting device is directly incident to the opening and the periphery thereof. This allows the frost re-frozen in the tray to be melted and reliably discharged through the opening and the drain pipe.
As described above, it is possible to provide a defrosting device which is manufactured at low cost and has sufficient defrosting performance.
In addition, the present invention provides a defrosting apparatus in which a position of a lower end portion of the roof portion in a height direction is arranged at a position same as or above a position of an upper end of the glass tube, and a position of the roof portion in the height direction is arranged at a position same as or below the position of the upper end of the glass tube plus a length corresponding to 1.5 times an outer diameter of the glass tube.
According to the present invention, since the lower end of the roof is disposed at the same position as or above the upper end of the glass tube, frost attached to the evaporator above the glass tube can be reliably melted by heat transfer due to natural convection. Further, since the position of the roof is arranged at or below the position where the length corresponding to 1.5 times the outer diameter of the glass tube is added to the position of the upper end of the glass tube in the height direction, the glass tube can be arranged in the vicinity of the evaporator, and the effect of melting frost attached to the evaporator can be improved. At the same time, since the roof of the roof is not too far away from the tray, the radiant heat from the defrosting heater can be strongly reflected toward the tray side by the roof, and the effect of melting the frost in the tray can be improved.
With the arrangement of the roof portion as described above, frost on the evaporator and the tray can be effectively melted, and high defrosting performance can be exhibited.
In addition, the present invention provides a defrosting apparatus in which a width dimension of a lower end of the roof is in a range of 2 times or more and 3 times or less of an outer diameter of the glass tube in a cross section perpendicular to a longitudinal direction of the glass tube.
The width of the roof is set to be in the range of 2 times to 3 times of the outer diameter of the glass tube, thereby the frost of the evaporator and the tray can be melted well and effectively.
In addition, the present invention provides a defrosting apparatus further comprising a defrosting member formed of a metal rod after bending, the defrosting member having: a hook portion formed at one end of the metal rod and inserted into a hole portion provided at the top portion in a freely rotatable state; a heat receiving unit connected to the hook and extending obliquely downward while being connected to the top; a detour section connected to the heat receiving section and bent to bypass the glass tube; and a heat dissipation part connected to the bypass part and extending downward into the tray and the drain pipe.
According to the present invention, in the defrosting member rotatably attached to the roof by the hook, the heat receiving portion is in contact with the roof by gravity, and can receive heat from the defrosting heater through the metal roof. Further, the heat radiating portion can be disposed inside the tray and inside the drain pipe by gravity without interfering with the glass pipe by the bypass portion. The heat received by the roof portion is conducted to the heat radiating portion extending downward through the bypass portion, and the heat can be supplied from the heat radiating portion to frost or water in the tray or the drain pipe.
As described above, by using the defrosting member, it is possible to efficiently supply heat from the defrosting heater to frost or water in the tray or the drain pipe while being manufactured at low manufacturing cost.
In addition, the refrigerator of the present invention is characterized by including the above-described defrosting device.
The refrigerator of the present invention can also achieve any of the above-described effects.
[ Effect of the invention ]
As described above, in the present invention, it is possible to provide a defrosting device that can be manufactured at low cost and has sufficient defrosting performance, and a refrigerator including the defrosting device.
Fig. 1 schematically illustrates a side sectional view of a refrigerator having a defrosting apparatus according to an embodiment of the present invention.
Fig. 2 is a perspective view schematically showing an outline of a defrosting device according to a first embodiment of the present invention.
Fig. 3 is a cross-sectional view perpendicular to the longitudinal direction of the glass tube as viewed from the X-axis direction in fig. 2, and is a side cross-sectional view schematically showing the defroster according to the first embodiment of the present invention.
Fig. 4 is a cross-sectional view along the longitudinal direction of the glass tube, the cross-sectional view including a vertical line passing through substantially the center of the circular outer shape of the glass tube, and being a side cross-sectional view schematically showing the defrosting device according to the first embodiment of the present invention.
Fig. 5 is a cross-sectional view perpendicular to the longitudinal direction of the glass tube as viewed from the X-axis direction in fig. 2, and is a side cross-sectional view for explaining the arrangement of the roof portion according to the embodiment of the present invention.
Fig. 6 is a cross-sectional view perpendicular to the longitudinal direction of the glass tube as viewed from the X-axis direction of fig. 2, and is a side cross-sectional view schematically showing a defroster according to a second embodiment of the present invention.
Fig. 7 is a view showing a cross section perpendicular to the longitudinal direction of the glass tube as viewed from the X-axis direction of fig. 2, and is a side cross-sectional view schematically showing a defroster according to a third embodiment of the present invention.
Fig. 8 is a view showing a cross section perpendicular to the longitudinal direction of the glass tube as viewed from the X-axis direction of fig. 2, and is a side cross-sectional view schematically showing a defrosting apparatus according to a fourth embodiment of the present invention.
Fig. 9 is a perspective view for explaining a defrosting member according to an embodiment of the present invention.
Description of the reference numerals
2-defroster, 10-defroster, heater, 12-glass tube, 14-cover, 20-heater cover, 22-roof, 22A-first region, 22B-second region, 22C-third region, 22D-fourth region, 24-bracket, 26-hole section, 30-tray, 30A-bottom, 30B-side wall, 32-opening, 40-drain, 50-defroster, 52-hook, 54-heat receiving section, 56-detour section, 58-heat radiating section, 100-refrigerator, 102A-freezer, 102B-refrigerator, 104A, B inflow flow path, 106-divider, 106A-blow-out, 110-evaporator, 120-compressor, 130-fan, 140-damper, 150-drain, 160-evaporation tray, G-approximate center of glass tube, VL-vertical line, S-specified range.
Hereinafter, embodiments for implementing the present invention will be described with reference to the accompanying drawings. The defrosting device described below is for embodying the technical idea of the present invention, and the present invention is not limited to the following unless otherwise specified.
In the drawings, members having the same function may be denoted by the same reference numerals. For convenience of explanation or understanding, there is a case where the structures shown in the embodiments or examples are divided for convenience, but parts of the structures shown in different embodiments may be replaced or combined. In the embodiments described later, descriptions of things common to the above are omitted, and only different points will be described. In particular, the same operational effects caused by the same structures will not be mentioned in each embodiment or each example in turn. For clarity of description, the sizes, positional relationships, and the like of the members shown in the respective drawings may be shown in an expanded manner. In the following description and the drawings, an X axis, a Y axis, and a Z axis are shown assuming that the refrigerator is disposed on a floor surface. The vertical direction is indicated by the Z-axis, and the longitudinal direction of the glass tube 12 constituting the defrosting heater 10 described later is indicated by the X-axis.
(refrigerator including the defrosting apparatus of the present invention)
Fig. 1 is a side sectional view schematically showing one example of a refrigerator 100 including a defrosting apparatus 2 of an embodiment of the present invention. The refrigerator 100 shown in fig. 1 includes a freezing compartment 102A and a refrigerating compartment 102B. An inflow flow path 104A, B partitioned by a partition plate 106 is provided on the rear side of the freezing chamber 102A and the refrigerating chamber 102B. Evaporator 110 is disposed in inflow channel 104A on the freezing chamber 102A side, and fan 130 is disposed above evaporator 110. A defroster 2 according to each embodiment described below is disposed below the evaporator 110.
A compressor 120 communicating with the evaporator 110 is disposed in the machine room outside the rear side of the freezing room 102A. The following cycle is repeated: the refrigerant (gas) compressed by the compressor 120 is liquefied by the condenser, the liquefied refrigerant absorbs heat of the gas in the tank in the evaporator 110 and is vaporized, and the vaporized refrigerant is compressed again by the compressor 120. Damper 140 is disposed between inflow passage 104A on the freezing compartment 102A side and inflow passage 104B on the refrigerating compartment 102B side. In fig. 1, the damper 140 is shown in a closed state.
As shown by the broken-line arrows in fig. 1, when compressor 120 and fan 130 are driven with the damper closed, the gas in freezing chamber 102A flows, and the cold air having passed through evaporator 110 flows into freezing chamber 102A from outlet port 106A provided in partition plate 106. The gas flowing in circulates through freezing chamber 102A and returns to the lower side of evaporator 110 in inflow channel 104A again. The inside of the freezing chamber 102A is cooled by the circulation of the gas cooled by the evaporator 110. In a state where damper 140 is open, the cool air also circulates in refrigerating compartment 102B.
Moisture contained in the cooled air is condensed into frost and adheres to the surfaces of the heat exchange tubes of the evaporator 110. The cooling performance is degraded when a large amount of frost adheres to the heat exchange tubes, and therefore, it is necessary to periodically defrost the evaporator 110. Therefore, the defroster 2 is disposed below the evaporator 110. The defrosting device 2 includes a defrosting heater 10, and when the compressor 120 and the fan 130 are not operated, the defrosting heater 10 is turned on, whereby the heat exchange tubes can be heated and defrosted. The water falling from the frost melting in the evaporator 110 is discharged from the drain pipe 40 of the defrosting apparatus 2, flows through the drain pipe 150 of the refrigerator 100, and is discharged to the steam tray 160 disposed in the machine room.
(defrosting device according to first embodiment)
Fig. 2 is a perspective view schematically showing an outline of the defroster 2 according to the first embodiment of the present invention. Fig. 3 is a view showing a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction in fig. 2, and is a side cross-sectional view schematically showing the defroster 2 according to the first embodiment of the present invention. Fig. 4 is a cross-sectional view along the longitudinal direction of the glass tube including a vertical line passing through substantially the center of the circular outer shape of the glass tube, and is a side cross-sectional view schematically showing the defrosting device according to the first embodiment of the present invention. In fig. 4, the description of the tray is omitted. Next, a defrosting device 2 according to a first embodiment of the present invention will be described with reference to fig. 2 to 4.
The defrosting device 2 according to the present embodiment includes a defrosting heater 10 having a heating element in a single-walled quartz glass tube 12. The defroster 2 includes a heater cover 20, and the heater cover 20 includes a roof portion 22 formed of a thin metal plate and protruding upward, which is disposed above the glass tube 12 and extends in the longitudinal direction of the glass tube 12. Furthermore, the defrosting device 2 further includes: a tray 30 disposed below the glass tube 12 and extending in the longitudinal direction of the glass tube 12, and a drain pipe 40 extending downward from an opening 32 provided at the bottom of the tray 30. In fig. 3, the drain pipe 40 shown in fig. 2 is schematically shown.
Further, the defroster 2 according to the present embodiment includes a defrosting member 50 formed by bending a metal rod. The defrosting part 50 includes: a hook portion 52 formed at one end of the metal rod and inserted into a hole portion 26 provided in the metal sheet constituting the roof portion 22 in a freely rotatable state, a heat receiving portion 54 connected to the hook portion 52 and extending obliquely downward while being connected to the metal sheet constituting the roof portion 22, a detour portion 56 connected to the heat receiving portion 54 and bent so as to detour around the glass tube 12, and a heat dissipating portion 58 connected to the detour portion 56 and extending downward to the inside of the tray 30 and the inside of the drain pipe 40.
< defrost heater >
The glass tube 12 constituting the defrosting heater 10 according to the present embodiment has an elongated cylindrical shape. A heating element made of a metal wire such as a nichrome wire is disposed inside the glass tube 12. A coil heater wound in a coil shape from a metal wire is disposed in a central heating region of the glass tube 12, and the metal wire extends outward from both ends thereof. Both ends of the glass tube 12 are covered with caps 14 made of a material having excellent heat resistance and electrical insulation, such as silicone rubber. The metal wires extending from both sides of the coil-shaped heater extend to the outside of the glass tube 12 via the cover 14, and are electrically connected to an external cable.
In order to comply with IEC regulations, the input power is controlled so that the temperature of the outer surface of the glass tube 12 when heated is 360 ℃ or lower. Such control of the input power enables practically sufficient defrosting of the evaporator 110, which will be described later in detail.
< Heater cover >
The heater cover 20 includes a roof portion 22 formed of a thin metal plate extending in the longitudinal direction of the glass tube 12 and protruding upward, and brackets 24 provided on both sides of the roof portion 22 in the longitudinal direction. The covers 14 at both ends of the glass tube 12 are inserted into substantially C-shaped openings provided in the bracket 24, and the heater cover 20 is connected to the defrosting heater 10.
As the metal thin plate constituting the roof portion 22, in the present embodiment, an aluminum thin plate having high reflectance and high thermal conductivity is used. However, it is not limited thereto, and other arbitrary metal thin plate such as copper can be used. The aluminum thin plate may be bent to have an upwardly convex shape, or 2 aluminum thin plates may be joined to have an upwardly convex shape.
In a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction, the metal thin plate of the roof portion 22 is formed in an upwardly convex shape which is symmetrical with respect to a vertical line VL in at least a predetermined range S on both sides of the vertical line VL passing through the substantially center G of the circular outer shape of the glass tube 12. Here, the predetermined ranges S on both sides of the vertical line VL refer to ranges which are horizontally wide from the vertical line VL in the Y-axis direction perpendicular to the vertical line VL in 2 regions divided by the vertical line VL in the Z-axis direction. The upwardly convex shape of the roof 22 has 2 flat panels, a first area 22A and a second area 22B. As described below, the reflection surfaces of the first region 22A and the second region 22B may be formed by flat surfaces, or the reflection surfaces of the first region 22A and the second region 22B may be formed by smoothly curved surfaces.
Further, as shown in fig. 4, in a cross section along the longitudinal direction of the glass tube 12, the roof portion 22 has a third region 22C and a fourth region 22D inclined downward in end regions on both sides in the longitudinal direction, and reflects radiant heat from the lower side downward. That is, as shown in fig. 2, the roof portion 22 has a structure like a four-pitched roof composed of 4 thin plate-like members of the first to fourth regions 22A to 22D, and has a shape that enhances reflection on all side surfaces. The reflection surfaces of the third region 22C and the fourth region 22D may be formed by flat surfaces, or the reflection surfaces of the third region 22C and the fourth region 22D may be formed by smoothly curved surfaces.
With the above configuration, the radiant heat from the defrosting heater 10 can be reflected downward and incident on the main portion of the tray 30 below. This can melt the frost re-frozen in the tray 30.
< tray and Drain pipe >
The tray 30 extends along the longitudinal direction of the glass tube 12, and the tray 30 has a bottom 30A and a side wall 30B surrounding the bottom 30A and opens upward. An opening 32 is provided at a substantially central position in the longitudinal direction of the bottom 30A of the tray 30. The bottom 30A of the tray 30 is sloped to minimize the height of the opening 32. Thus, the water falling from the evaporator 110 above flows through the bottom 30A of the tray 30 and flows into the opening 32. A drain pipe 40 is attached to an opening 32 provided in the bottom 30A of the tray 30, and the drain pipe 40 extends downward from the opening 32.
In a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction, the opening 32 of the tray 30 is located directly below the glass tube 12. With such a configuration, the opening 32 and the area around it can directly receive the radiation heat from the defrosting heater 10, and the frost re-frozen in the tray 30 can be melted.
The tray 30 is preferably formed of a metal material having high thermal conductivity such as aluminum. When considering ease of installation of the defroster 2 to the refrigerator 100, etc., the drain pipe 40 is preferably formed of a resin material or the like having elasticity.
(roof arrangement)
Fig. 5 is a cross-sectional view perpendicular to the longitudinal direction of the glass tube as viewed from the X-axis direction in fig. 2, and is a side cross-sectional view for explaining the arrangement of the roof portion 22 according to the embodiment of the present invention. In fig. 5 and fig. 6 to 8 described later, the arrows indicated by broken lines indicate the radiant heat emitted from the defrosting heater 10, and the arrows indicated by dashed-dotted lines indicate the upward flow of the ambient gas heated by the defrosting heater 10 due to natural convection. Although fig. 5 illustrates the defroster according to the first embodiment shown in fig. 3, the function of the roof portion 22 is basically the same in the defroster according to the second to fourth embodiments described with reference to fig. 6 to 8.
The upwardly convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL in a predetermined range S on both sides of the vertical line VL passing through the approximate center G of the circular outer shape of the glass tube 12 in a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction. In the first embodiment, the predetermined range S is uniform over the entire roof portion 22, and all the regions are symmetrical with respect to the vertical line VL. However, the present invention is not limited thereto, and other cases will be described in detail later.
The predetermined range S is preferably determined in accordance with the width dimension of the tray 30 perpendicular to the longitudinal direction when viewed from the X-axis direction. In the case where both ends in the width direction of the tray 30 are located at equal distances from the vertical line VL, it is preferable that the upwardly convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL up to the range where the reflected light reaches both ends of the tray 30. In the case where the distance from the vertical line VL is different at both ends in the width direction of the tray 30, it is preferable that the upwardly convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL up to a range where the reflected light reaches at least the end near the vertical line VL side. This allows the radiation heat with small variations or deviations to be incident on the main portion of the tray 30, thereby efficiently melting the frost in the tray 30.
In a cross section perpendicular to the longitudinal direction of the glass tube 12 viewed from the X-axis direction, the first region 22A and the second region 22B are shown as two side faces connected at the top P located on the vertical line VL. The angle θ formed by the first region 22A and the vertical line VL substantially coincides with the angle θ formed by the second region 22B and the vertical line VL. Further, in the example shown in fig. 5, the lengths of the first region 22A and the second region 22B are also identical.
This case can also be considered as follows: in a cross section perpendicular to the longitudinal direction of the glass tube 12 viewed from the X-axis direction, the first region 22A and the second region 22B constitute 2 equilateral sides of an isosceles triangle having a vertex P located on the vertical line VL as a vertex.
As shown by the two-dot chain lines in fig. 5, when the first region 22A and the second region 22B extend obliquely downward, they extend to intersect the horizontal line of the bottom surface of the tray 30. Thereby, the upper half of the parallelogram is formed. Further, the center of the opening 32 of the tray 30 substantially coincides with the position of the vertical line VL. That is, the opening 32 of the tray 30 is located at the center of a parallelogram having the roof portion 22 of an upwardly convex shape and its extended line as two sides.
With this arrangement, the radiant heat emitted upward from the defrosting heater 10 can be reflected downward by the roof 22, and the radiant heat with little deviation or skew can be made incident on the main portion of the tray 30 other than the portion directly below the glass tube 12. A region where the reflected light from the roof 22 does not reach exists directly below the glass tube 12, but the radiant heat emitted downward from the defrosting heater 10 is directly incident on such a region. This allows the frost re-frozen in the main portion of the tray 30 to be efficiently thawed. The melted water flows into drain pipe 40 through switch 32, flows through drain pipe 150 of refrigerator 100, and is discharged to evaporation pan 160 disposed in the machine room.
In the example shown in fig. 5, the position H1 of the lower end of the roof 22 is located above the position H0 of the upper end of the glass tube 12 in the height direction (Z-axis direction). However, the present invention is not limited to this, and the position H1 of the lower end of the roof 22 may be arranged at the same position as the position H0 of the upper end of the glass tube 12. That is, the position H1 of the lower end of the roof 22 is the same as or above the position H0 of the upper end of the glass tube 12 in the height direction (Z-axis direction).
With such a setting, the gas around the glass tube 12 heated by the defrosting heater 10 can be efficiently made to flow upward by natural convection. Thus, heat can be supplied to the evaporator 110 by natural convection heat transfer, and thus, frost attached to the evaporator 110 can be reliably melted.
The position H2 of the top P of the roof 22 in the height direction (Z-axis direction) is equal to or below the position H0 of the upper end of the glass tube 12 plus a length corresponding to 1.5 times the outer diameter of the glass tube 12. With such a setting, the defrosting heater 10 can be relatively close to the evaporator 110, and therefore, the effect of melting the frost attached to the evaporator 110 can be improved. At the same time, since the roof portion P of the roof portion 22 is not largely separated from the tray 30, the radiation heat from the defrosting heater 10 can be strongly reflected to the tray 30 by the roof portion 22, and the effect of melting the frost in the tray 30 can be improved. With the arrangement of the roof portion 22 as described above, frost in the evaporator 110 and the tray 30 can be effectively melted, and high defrosting performance can be exhibited.
In the present embodiment, the width W of the roof portion 22 at the lower end thereof is in the range of 2 times to 3 times the outer diameter D of the glass tube in a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed in the X-axis direction. Further, if the distance between the end in the width direction of the lower end of the roof portion 22 and the outer shape of the glass tube 12 is set to M, there is a relationship of 0.5 D.ltoreq.M.ltoreq.D.
When the width W of the roof portion 22 at the lower end is not so large as compared with the outer diameter of the glass tube 12, the heat generated by the defrosting heater 10 cannot be sufficiently reflected downward. On the other hand, when the width W of the lower end of the roof portion 22 is considerably larger than the outer diameter of the glass tube 12, it is difficult to supply heat to the upper evaporator 110 side by natural convection. Therefore, by setting the width W at the lower end of the roof portion 22 to be in the range of 2 times to 3 times the outer diameter of the glass tube 12, frost can be melted in both the evaporator 110 and the tray 30 in a well-balanced and efficient manner. The same relationship is shown in a cross section perpendicular to the longitudinal direction of the glass tube 12 viewed from a direction 180 degrees opposite to the X-axis direction.
(defroster according to second embodiment)
Fig. 6 is a cross-sectional view perpendicular to the longitudinal direction of the glass tube as viewed from the X-axis direction of fig. 2, and schematically shows a side cross-sectional view of a defroster according to a second embodiment of the present invention. In the defroster 2 of the second embodiment, the roof portion 22 also has an upwardly convex shape in which two flat plate-like first regions 22A and second regions 22B are connected. However, in a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed in the X-axis direction, the length of the second region 22B is the same as that of the first embodiment, but the length of the first region 22A is longer than that of the first embodiment.
As shown in fig. 6, in a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction, the upwardly convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL in a predetermined range S on both sides of the vertical line passing through substantially the center G of the circular outline of the glass tube 12, but is not symmetrical with respect to the vertical line VL in all regions. In a first region 22A of the roof 22, the width extends by an amount T.
In the first embodiment described above, the distance from the vertical line VL is substantially the same at the end in the width direction of the lower tray 30 in the Y-axis direction perpendicular to the vertical line VL in the cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed in the X-axis direction, but in the second embodiment, the distances from the vertical line VL are different at both ends in the width direction of the tray 30. The upwardly convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL in a range where the reflected light is incident on the end on the vertical line VL side in the width direction of the tray 30 (the end on the right side in the drawing). Then, by adjusting the length of the roof 22, the reflected light also enters the other end (the left end in the drawing). The cross section perpendicular to the longitudinal direction of the glass tube 12 viewed from the direction 180 degrees opposite to the X-axis direction shows the same relationship but reversed left and right.
(defrosting device according to third embodiment)
Fig. 7 is a cross-sectional view perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction in fig. 2, and is a side cross-sectional view schematically showing a defroster 2 according to a third embodiment of the present invention.
In the defrosting devices according to the first and second embodiments described above, the roof portion 22 is formed of the two flat plate-like first regions 22A and second regions 22B, but in the third embodiment, the roof portion 22 is formed of a smoothly curved surface.
In this case, by appropriately determining the curvature of the curved surface of the roof portion 22, as shown in fig. 7, the radiant heat emitted upward from the defrosting heater 10 can be reflected downward by the roof portion 22 and can be made incident on the main portion of the tray 30 except the region blocked by the glass tube 12. In the third embodiment, similarly to the first embodiment, the roof portion 22 is symmetrical with respect to a vertical line VL passing through substantially the center G of the circular outer shape of the glass tube 12 in all regions. The same relationship is shown in a cross section perpendicular to the longitudinal direction of the glass tube 12 viewed from a direction 180 degrees opposite to the X-axis direction.
(defrosting device according to fourth embodiment)
Fig. 8 is a cross-sectional view perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction in fig. 2, and is a side cross-sectional view schematically showing a defroster 2 according to a fourth embodiment of the present invention.
In the fourth embodiment, the roof portion 22 is also formed of a smoothly curved surface. In a cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction, the upwardly convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL within a predetermined range S on both sides of the vertical line passing through the approximate center G of the circular outline of the glass tube 12, but the roof portion 22 is not symmetrical with respect to the vertical line VL in all regions. In a first region 22A of the roof 22, the width extends by an amount T.
In the fourth embodiment, in the cross section perpendicular to the longitudinal direction of the glass tube 12 as viewed from the X-axis direction of fig. 2, the distance between both ends in the width direction of the tray 30 with respect to the vertical line VL is different. The upwardly convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL in a range where the reflected light is incident on the end on the vertical line VL side (the end on the right side in the drawing) in the width direction of the tray 30. Then, by adjusting the length of the roof 22, the reflected light also enters the other end (the left end in the drawing). The same relationship of left-right inversion is shown in a cross section perpendicular to the longitudinal direction of the glass tube 12 viewed from a direction 180 degrees opposite to the X-axis direction.
As described above, any of the defrosting devices 2 according to the first to fourth embodiments of the present invention described above includes: a defrosting heater 10 having a heating element in a single-wall glass tube 12 having a circular cross section perpendicular to a longitudinal direction, a roof portion 22 disposed above the glass tube 12 and extending in the longitudinal direction of the glass tube 12 and formed of a thin metal plate, the roof portion being convex upward, a tray 30 disposed below the glass tube 12 and extending in the longitudinal direction of the glass tube 12 and having an opening 32 formed in a bottom portion thereof, and a drain tube 40 extending downward from the opening 32, wherein, in the cross section perpendicular to the longitudinal direction of the glass tube 12, a top portion P of the roof portion 22 is located on a vertical line VL passing through a substantially center G of the glass tube 12, the roof portion 22 is symmetrical with respect to the vertical line VL in at least a predetermined range on both sides of the vertical line VL, and, in the cross section along the longitudinal direction of the glass tube 12 including the vertical line VL, end regions on both sides of the longitudinal direction of the roof portion 22 are inclined downward to reflect radiant heat from a lower side downward, the opening 32 is located directly below the glass tube 12.
By using a single layer glass tube 12, the manufacturing cost of the device can be reduced. Even if the input power to the defrosting heater 10 is suppressed in order to reduce the outer surface temperature of the glass tube 12, the roof 22 can reflect the radiant heat from the defrosting heater 10 toward the tray 30 to melt the frost in the tray 30. In particular, the upward convex shape of the roof portion 22 is symmetrical with respect to the vertical line VL in at least a predetermined range S on both sides of the vertical line VL passing through the approximate center G of the glass tube 12, and in the longitudinal direction (X-axis direction shown in fig. 2) of the glass tube 12, end regions (see 22C and 22D in fig. 4) on both sides are inclined so as to reflect radiant heat from the lower side to the lower side, and the opening 32 of the tray 30 is located directly below the glass tube 12. This allows radiant heat with little deviation or skew to be incident on the main portion of the tray 30 by using the reflected heat from the roof 22 and the radiant heat directly received from the defrosting heater 10. Accordingly, the frost attached to the evaporator 110 can be melted and discharged through the opening 32 of the tray 30 and the drain pipe 40. According to the above, the defroster 2 that can be manufactured at low cost and has sufficient defrosting performance can be provided.
In addition, according to the defrosting devices 2 according to the first to fourth embodiments, since the position H1 of the lower end portion of the roof portion 22 is arranged at or above the position H0 of the upper end of the glass tube 12 in the height direction (Z-axis direction), frost attached to the evaporator 110 can be efficiently melted by natural convection heat transfer. Further, since the position H2 of the top P of the roof 22 is located at the same position or below the position H0 of the upper end of the glass tube 12 to which the length corresponding to 1.5 times the outer diameter of the glass tube 12 is added in the height direction (Z-axis direction), the effect of melting the frost attached to the evaporator 110 can be improved, and the effect of melting the frost in the tray 30 can be improved. According to the arrangement of the roof 22 as described above, frost of the evaporator 110 and the tray 30 can be effectively melted to provide high defrosting performance.
Further, according to the defroster 2 of the first to fourth embodiments, the width W of the lower end of the roof portion 22 is in the range of 2 times to 3 times the outer diameter D of the glass tube 12, and therefore, frost can be melted in both the evaporator 110 and the tray 30 in a well-balanced and efficient manner.
(defrosting means)
Fig. 9 is a perspective view for explaining a defrosting member according to an embodiment of the present invention. Fig. 9 schematically shows the shape of the roof portion 22. In any of the defrosting apparatuses 2 according to the above-described embodiments, the defrosting member 50 is formed by bending a metal rod. As shown in fig. 3 or 9, the defrosting member 50 has a hook portion 52 formed at one end of a metal rod and inserted into a hole 26 provided in a metal thin plate constituting the roof portion 22 in a rotatable state. The defrosting member 50 further includes a heat receiving portion 54 connected to the hook portion 52 and extending obliquely downward while being connected to the metal sheet constituting the roof portion 22. The defrosting member 50, one end of which is rotatably attached to the roof 22 by the hook 52, is suspended by gravity, and the heat receiving unit 54 extends obliquely downward while contacting the metal sheet constituting the roof 22.
Further, the defrosting member 50 has a detour portion 56 connected to the heat receiving portion 54 and bent to bypass the glass tube 12. Since the heat receiving block 54 is in contact with the thin metal plate constituting the roof 22 by gravity and fixed in position, the bypass portion 56 can be reliably separated from the glass tube 12. Further, the defrosting member 50 has a heat radiating portion 58 connected to the detour portion 56 and extending downward to the inside of the tray 30 and the inside of the drain pipe 40. The defrost member 50 terminates at the end of the heat sink 58.
In the defrosting member 50 rotatably attached to the roof 22 by the hook 52, the heat receiving unit 54 is in contact with the roof 22 by gravity, and therefore the heat receiving unit 54 receives heat from the defrosting heater 10 via the metal roof 22 in contact therewith. The heat received by the heat receiving unit 54 is conducted to a heat radiating unit 58 extending downward through the bypass unit 56. Thereby, heat is supplied from the heat radiating portion 58 to the frost or water in the tray 30 or the drain pipe 40. This can melt the frost in the tray 30 or in the drain pipe 40 and discharge the frost through the drain pipe 40.
As described above, by using the defrosting member 50 in addition to the roof 22, the heat from the defrosting heater 10 can be efficiently supplied to the frost or water in the tray 30 or the drain pipe 40 at a low manufacturing cost.
Further, as shown by an arrow A, B in fig. 9, the defrosting member 50 can be arranged so as to rotate along the surface of the roof 22. Therefore, when the defrosting device 2 is installed in the refrigerator 100 or when components are removed or replaced, the defrosting component 50 is placed along the surface of the roof 22 and fixed using a tape or the like, thereby preventing the defrosting component 50 from interfering with other members and improving the operation efficiency.
(refrigerator)
The refrigerator 100 including the defroster 2 according to the embodiment as shown in fig. 1 can also exhibit any of the above-described operational advantages.
While the embodiments and embodiments of the present invention have been described, the disclosure may be changed in details of the structure, and combinations or changes in the order of elements of the embodiments and embodiments, etc. may be realized without departing from the scope and spirit of the claimed invention.
Claims (10)
- A defrost device, comprising:a defrosting heater having a heating element in a single-layer glass tube whose cross section perpendicular to a longitudinal direction is circular;a roof portion which is disposed above the glass tube, extends in a longitudinal direction of the glass tube, is formed of a metal thin plate, and has an upwardly convex shape;A tray disposed below the glass tube, extending in a longitudinal direction of the glass tube, and having an opening at a bottom thereof; anda drain pipe extending downward from the opening,in a cross section perpendicular to the longitudinal direction of the glass tube,the roof portion is located on a vertical line passing through substantially the center of the glass tube, the roof portion is symmetrical with respect to the vertical line within at least a predetermined range on both sides of the vertical line,in a cross section along the longitudinal direction of the glass tube including the vertical line, end regions on both sides of the roof portion in the longitudinal direction are inclined downward to reflect radiant heat from the lower side downward, and the opening is located directly below the glass tube.
- The defroster according to claim 1, wherein a position of a lower end portion of the roof portion in a height direction is arranged at the same position as or above an upper end of the glass tube,the roof portion is disposed at the same position or below the position of the upper end of the glass tube plus a length 1.5 times the outer diameter of the glass tube in the height direction.
- The defroster according to claim 1, wherein a width dimension at a lower end of the roof portion in a cross section perpendicular to a longitudinal direction of the glass tube is in a range of 2 times or more and 3 times or less an outer diameter of the glass tube.
- The defroster of claim 1 further comprising a defrosting member composed of a bent metal rod,the defrosting component comprises:a hook portion formed at one end of the metal rod and inserted into a hole provided in the roof portion in a rotatable state;a heat receiving unit connected to the hook unit and extending obliquely downward while being connected to the roof unit;a bypass portion connected to the heat receiving portion and bent to bypass the glass tube; andand a heat dissipation part connected to the bypass part and extending downward into the tray and the drain pipe.
- The defroster of claim 1, wherein the roof portion is composed of two flat plate-like first and second regions; alternatively, the roof portion is composed of a first region and a second region having curved surfaces.
- The defroster of claim 5 wherein the first region and the second region are symmetrically disposed with respect to the vertical line.
- The defroster of claim 5 wherein the first region forms an angle θ with the vertical that coincides with an angle θ formed by the second region with the vertical, the first region being longer than the second region.
- The defroster according to claim 1, wherein the roof portion has a third region and a fourth region inclined downward in end regions on both sides in a longitudinal direction thereof.
- The defroster according to claim 8 wherein the reflection surfaces of the third and fourth regions are flat or curved.
- A refrigerator, characterized in that it comprises a defrosting device according to claim 1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019204064A JP7374464B2 (en) | 2019-11-11 | 2019-11-11 | Refrigerator with defrost device and defrost device |
| JP2019-204064 | 2019-11-11 | ||
| PCT/CN2020/127645 WO2021093713A1 (en) | 2019-11-11 | 2020-11-10 | Defrosting device and refrigerator comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114761747A true CN114761747A (en) | 2022-07-15 |
Family
ID=75897188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080077687.2A Pending CN114761747A (en) | 2019-11-11 | 2020-11-10 | Defrosting device and refrigerator comprising same |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4060261A4 (en) |
| JP (2) | JP7374464B2 (en) |
| CN (1) | CN114761747A (en) |
| WO (1) | WO2021093713A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115406169B (en) * | 2022-08-22 | 2023-10-20 | 藤泽电工（上海）有限公司 | Durable waterproof defrosting device |
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| JPH11132637A (en) * | 1997-10-31 | 1999-05-21 | Sanyo Electric Co Ltd | Drain apparatus for refrigerator |
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| JPH08313146A (en) * | 1995-05-16 | 1996-11-29 | Sanyo Electric Co Ltd | Defrosted water draining device for refrigerator with deep freezer |
| KR100288262B1 (en) * | 1998-06-30 | 2001-05-02 | 전주범 | Defrost heater protection device of refrigerator |
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| JP2005055004A (en) * | 2003-08-04 | 2005-03-03 | Hitachi Home & Life Solutions Inc | Refrigerator |
| JP2006010151A (en) * | 2004-06-24 | 2006-01-12 | Hitachi Home & Life Solutions Inc | Refrigerator |
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| JP2013245885A (en) * | 2012-05-28 | 2013-12-09 | Panasonic Corp | Refrigerator |
| CN203605587U (en) * | 2013-11-05 | 2014-05-21 | 合肥美的电冰箱有限公司 | Refrigerator |
| CN204006894U (en) * | 2014-05-30 | 2014-12-10 | 松下电器研究开发(苏州)有限公司 | Refrigerator |
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| CN207741416U (en) * | 2017-10-31 | 2018-08-17 | 合肥华凌股份有限公司 | A kind of the heat conduction probe assembly and its refrigerator defrost component of heating tube |
| CN108120211A (en) * | 2017-11-29 | 2018-06-05 | 青岛海尔股份有限公司 | A kind of automatic refrigerator defrosting system and with its refrigerator |
-
2019
- 2019-11-11 JP JP2019204064A patent/JP7374464B2/en active Active
-
2020
- 2020-11-10 EP EP20887092.3A patent/EP4060261A4/en active Pending
- 2020-11-10 WO PCT/CN2020/127645 patent/WO2021093713A1/en unknown
- 2020-11-10 CN CN202080077687.2A patent/CN114761747A/en active Pending
-
2023
- 2023-10-18 JP JP2023179236A patent/JP2024001226A/en active Pending
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| JPH11132637A (en) * | 1997-10-31 | 1999-05-21 | Sanyo Electric Co Ltd | Drain apparatus for refrigerator |
| JP2000314581A (en) * | 1999-04-28 | 2000-11-14 | Sanyo Electric Co Ltd | Drain device of refrigerator |
| CN1754075A (en) * | 2003-02-20 | 2006-03-29 | 松下电器产业株式会社 | Defrosting heater and method of manufacturing the same |
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| CN210220362U (en) * | 2019-05-31 | 2020-03-31 | 松下电器研究开发(苏州)有限公司 | Refrigerator with a door |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7374464B2 (en) | 2023-11-07 |
| JP2024001226A (en) | 2024-01-09 |
| EP4060261A1 (en) | 2022-09-21 |
| WO2021093713A1 (en) | 2021-05-20 |
| EP4060261A4 (en) | 2022-12-07 |
| JP2021076307A (en) | 2021-05-20 |
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