CN1467467A - Defrosting heater of household refrigerator - Google Patents
Defrosting heater of household refrigerator Download PDFInfo
- Publication number
- CN1467467A CN1467467A CNA031234119A CN03123411A CN1467467A CN 1467467 A CN1467467 A CN 1467467A CN A031234119 A CNA031234119 A CN A031234119A CN 03123411 A CN03123411 A CN 03123411A CN 1467467 A CN1467467 A CN 1467467A
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- China
- Prior art keywords
- glass tube
- defrost heater
- metal tube
- tube
- household electric
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- 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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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
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- 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
- H05B3/02—Details
- H05B3/04—Waterproof or air-tight seals for heaters
-
- 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
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
- Resistance Heating (AREA)
Abstract
To provide a low-cost defrosting heater which is adapted to a household refrigerator using an inflammable HC cooling medium, has high heating efficiency, and is excellent in safety characteristics. The defrosting heater 20 for the household refrigerator supports a heat-resistant glass tube 7, an electric heat wire 6 inserted into the glass tube 7, a metal tube 11 where the glass tube 7 is loosely inserted and which surrounds the circumference of the glass tube, and lead line portions 13 of the electric heat wire 6 pulled out from both ends of the glass tube 7. The defrosting heater has a double structure of the outer metal tube 11 and the inner glass tube 7 which have heat-resistant seal caps 12 and 12 almost sealing both end openings of both the metal tube 11 and the glass tube 7, and maintains the outer surface temperature of the metal tube 11 having high heat dissipation efficiency in that less than the safety standard temperature which is ignition temperature of the HC cooling medium minus 100[deg.]C.
Description
Technical field
Originally relating to invention relates to a kind of heating and melting, removes the Defrost heater attached to the ice on the evaporimeter (cooler) of household electric refrigerator (comprising family expenses fridge-freezer, household freezer), frost.
Background technology
In the past, cold-producing medium as household electric refrigerator (comprising family expenses fridge-freezer, freezing cases) used Freon gas R12, but damaged the ozone layer in order to prevent before this, control freon and use replacement fluorine Leon R143a instead, after in COP3, adopt the Kyoto Protocol prevent global warming again, do not use above-mentioned replacement fluorine Leon R143a, and stride forward towards the direction of using hydrocarbon (hereinafter to be referred as the HC) cold-producing medium of no freon cold-producing medium instead.
So,, on a part of household electric refrigerator, begin to adopt the iso-butane (CH of the HC cold-producing medium R600a that is much accounted of as above-mentioned HC cold-producing medium since 2002
3)
3CH.
In fact, because above-mentioned HC cold-producing medium R600a is that ignition temperature is 494 ℃ a imflammable gas, LEL is 1.8%V/V, so its instructions for use will have countermeasure as safe as a house.
This point, as Japanese electric machine industry association (hereinafter to be referred as JEMA) from the security of the refrigerator of the use hydrocarbon refrigerant of primary standard and generally require to have made following regulation in the item: near electrical equipment, the concentration of the cold-producing medium that leaks is no more than 75% of above-mentioned LEL, and the surface temperature that exposes the element in the HC cold-producing medium that spills to the open air is no more than the temperature (the autonomous normal temperature of JEMA) that the cold-producing medium ignition temperature deducts 100K.
Present household electric refrigerator is general to adopt such structure: in the rear side of refrigerator 1 or independently 2 evaporimeters (cooler) and fan are set usually, and be used to remove lip-deep frost attached to described evaporimeter, the Defrost heater of ice is configured in the below of each evaporimeter, and the configuration dish that uncovers thereunder.For example, Figure 13 is near the internal structure schematic diagram the vegetable compartment of lower freezer compartment type household electric refrigerator, adopts such structure: the rear side of vegetable compartment 1 disposed the fan 2 of forcibly cold air being delivered to the refrigerating chamber that does not illustrate among vegetable compartment 1 or the figure above it, evaporimeter 3, this evaporimeter 3 below Defrost heater 5 and coil 9 than its more following uncovering.The configuration mode of having represented Defrost heater 5 among Figure 16.
The Defrost heater 5 of above-mentioned household electric refrigerator must be removed the frost of described evaporimeter 3 effectively in 20～30 minutes short time, wide about 600 millimeters of present main flow, the household electric refrigerator of internal capacity 300～420 liters mainly uses so-called pharoid 10 such shown in the structure chart of Figure 14, the structure of this pharoid is: about 90～150 watts heating wires (winding heater) 6 are interted in external diameter 10.5 millimeter, in the transparent glass tube (being cylindrical duct) 7 of long 300 millimeter, the internal gas (steam) of diameter 1 millimeter that both ends open does not illustrate in figure is extracted out the hole, roughly seals with heat resisting seal cover 8.
Here, as the Defrost heater that is suitable for new HC cold-producing medium R600a, once considered to become the substance glass tube of former pharoid 10 dual, below 394 ℃, the novel household refrigerator of the use HC cold-producing medium of listing in 2002 has adopted the pharoid of this improved dual glass tube structure to the surface temperature control of the outside glass tube of surface area is big, diameter big (external diameter 20 millimeter) in the autonomous normal temperature of JEMA.This improvement is because if caloric value is the same, just become more little, the surface temperature step-down as the heat dissipation capacity of the big more per unit area of surface area (surface area of outside glass tube) of heater.
Figure 15 comprises that external diameter is the temperature variation curve (27 ℃ of heater power 130 watts (100 volts), room temperatures) of surface temperature-heat time heating time of the outside glass tube of pharoid 10 (band aluminium umbrella) under the open space experiment condition of the dual glass tube structure of 10.5 millimeters inner glass pipe (1.0 millimeters of wall thickness) and the external diameter outside glass tube that is 20 millimeters (1.8 millimeters of wall thickness).
As can distinguishing according to above-mentioned curve, surpass after 10 minutes the zone, HC cold-producing medium R600a is stabilized in the temperature (352 ℃) of the autonomous normal temperature of JEMA below 394 ℃.
But, pharoid as the novel dual glass tube structure of the Defrost heater of the household electric refrigerator that has adopted above-mentioned HC cold-producing medium R600a (iso-butane), the price height of its glass tube (having hear resistance and radiation efficiency height, material that hot permeability is good) own brings cost significantly to rise.
And, the pharoid 10 of the single-glass tubular construction before above-mentioned or the pharoid of above-mentioned dual glass tube structure, if touch the frozen water that evaporimeter 3 melts owing to be in the surface of the glass tube of high temperature, chilling, exist owing to the heating power shock wave produces cracked danger, and the danger that glass tube exists the borneol fallen to smash, therefore such shown in the configuration mode figure of Figure 13 and Figure 16 prevents the borneol destruction glass tube that falls down from evaporimeter 3 with umbrella (being generally the aluminium umbrella) 4 tops that cover Defrost heater 5 as its countermeasure.Also have as shown in Figure 14 in addition, the two ends of umbrella 4 are hung the structure that is attached to the top of glass tube 7 on the seal cover 8 that rides over pharoid 10 two ends.
So being provided with of umbrella 4 needs unnecessary space, cost height, and the efficiency of heating surface is low, though be radiation, radiant heat does not directly arrive on the evaporimeter 3, and blocked by described umbrella 4, major part passes in the air as a result, defrosts by heat conduction or Convective Heating evaporimeter 3.
And, as shown in Figure 14 and since Defrost heater this as structure of the glass tube that exposes, therefore broken danger arranged, its use, want reasonable care when being provided with.
Summary of the invention
The present invention is exactly In view of the foregoing, its objective is provides a kind of household electric refrigerator as cold-producing medium with imflammable gas HC cold-producing medium, particularly R600a (iso-butane) that is applicable to, with surface temperature control below the autonomous normal temperature of JEMA and the Defrost heater that cost is low, easy to use, the efficiency of heating surface is good.
For solving the technical scheme of goal of the invention
In order to achieve the above object, the present invention by the following technical solutions.
(1) Defrost heater of household electric refrigerator provided by the invention, it is characterized in that, include glass tube, with the heating wire that interts in described glass tube, insert described glass tube with pine, surround the metal tube of its periphery and support from the leading part of the double-end described heating wire of described glass tube and roughly seal the both ends open of described metal tube or the heat resisting seal cover of described metal tube and described glass tube both sides' both ends open.
(2) Defrost heater of the household electric refrigerator of being put down in writing in above-mentioned (1) is characterized in that, described metal tube is that 0.5～3 millimeter of wall thickness and maximum outside diameter are 18～50 millimeters aluminum pipe.
(3) Defrost heater of the household electric refrigerator of being put down in writing in above-mentioned (1) is characterized in that, the section profile of described metal tube is square.
(4) Defrost heater of the household electric refrigerator of being put down in writing in above-mentioned (1) is implemented fin processing at the outer surface of described metal tube.
(5) Defrost heater of the household electric refrigerator of being put down in writing in above-mentioned (1), the outer surface of described metal tube extend the metallic interconnect that links to each other with the metal dish that uncovers.
The invention effect
The Defrost heater of household electric refrigerator of the present invention constitutes as mentioned above like that, has following effect:
(1), therefore used the Defrost heater of the household electric refrigerator of flammable alternative chlorofluoro carbon not have to catch fire, damaged danger safe good effect like this because the metal tube that roughly seals of outer periderm covers.
(2) particularly can reach the autonomous normal temperature of relative JEMA and have sufficient redundancy for 394 ℃ for HC cold-producing medium R600a (iso-butane).
(3) do not need the required umbrella of former pharoid, efficiency of heating surface height.
(4) can contact configuration with evaporimeter, can improve the efficiency of heating surface.
(5) can with the metal dish thermally coupled that uncovers, enlarge the surface area of integrated heater, can obtain high radiating effect.
(6) pharoid than double glazing tubular construction is cheap, and is easy to use.
Description of drawings
The structural representation of the Defrost heater of Fig. 1 the 1st example of the present invention
The structural representation of the Defrost heater of Fig. 2 the 2nd example
The sectional structure chart of the middle body of Fig. 3 Defrost heater of the present invention
Fig. 4 Defrost heater of the present invention and before the pharoid of substance glass tube structure under the open space experiment condition the heat time heating time-the surface temperature change curve
During the experiment of the refrigerator pipeline configuration internal space of Fig. 5 Defrost heater of the present invention (100 volts, 150 watts) and the face of trying to get to the heart of a matter that uncovers the heat time heating time-the surface temperature change curve
During the experiment of the refrigerator pipeline configuration internal space of Fig. 6 Defrost heater of the present invention (100 volts, 130 watts) and the face of trying to get to the heart of a matter that uncovers the heat time heating time-the surface temperature change curve
During the experiment of the refrigerator pipeline configuration internal space of Fig. 7 Defrost heater of the present invention (100 volts, 98 watts) and the face of trying to get to the heart of a matter that uncovers the heat time heating time-the surface temperature change curve
Fig. 8 under the state below the evaporimeter that has freezed that is configured in the refrigerator pipeline configuration, the heat time heating time-temperature changing curve diagram of the each several part of Defrost heater of the present invention
The configuration example of Fig. 9 Defrost heater of the present invention
The configuration example of Figure 10 Defrost heater of the present invention
The longitudinal plane structure figure of the middle body of the 3rd example of Figure 11 Defrost heater of the present invention
The cross-sectional configuration figure of the middle body of the 4th example of Figure 12 Defrost heater of the present invention
Near the vegetable compartment of Figure 13 lower freezer compartment type household electric refrigerator internal structural map
The structure chart of the pharoid of Figure 14 single-glass tubular construction in the past
The configuration mode figure of Figure 15 Defrost heater (band aluminium umbrella) in the past
Figure 16 represents the curve map that the surface temperature of the outside glass tube of pharoid (band aluminium umbrella) when open space is tested of dual glass tube structure changes
Symbol description
1. vegetable compartment; 2. fan; 3. evaporimeter; 4. umbrella (aluminium umbrella); 5,20,30. Defrost heaters; 6. heating wire; 7. glass tube; 8,12. heat resisting seal covers; 9. dish uncovers; 10. pharoid; 11,21. metal tubes; 13. the leading part of heating wire; 14. ceramic seal member; 18. metallic interconnect; 22. fin; T. wall thickness; φ. external diameter; D. maximum outside diameter
The specific embodiment
The example of the Defrost heater of household electric refrigerator of the present invention is described below with reference to the accompanying drawings.
Fig. 1 is the structural representation of the Defrost heater of the 1st example of the present invention, and Fig. 2 is the structural representation of the Defrost heater of the 2nd example.Fig. 3 is the sectional structure chart of the middle body of Defrost heater of the present invention.Fig. 4 be Defrost heater of the present invention and before the pharoid of substance glass tube structure under the open space experiment condition the heat time heating time-the surface temperature change curve.Fig. 5, Fig. 6, Fig. 7 during for the refrigerator pipeline configuration internal space experiment of the Defrost heater of the present invention and the face of trying to get to the heart of a matter that uncovers the heat time heating time-the surface temperature change curve.Fig. 8 is under the state below the evaporimeter that has freezed that is configured in the refrigerator pipeline configuration, the heat time heating time-temperature changing curve diagram of the each several part of Defrost heater of the present invention.Fig. 9 and Figure 10 are the configuration example of Defrost heater of the present invention.Figure 11 is the longitudinal plane structure figure of middle body of the 3rd example of Defrost heater of the present invention.Figure 12 is the cross-sectional configuration figure of middle body of the 4th example of Defrost heater of the present invention.
At first, as Fig. 1 or shown in Figure 2, the Defrost heater 20 of household electric refrigerator of the present invention, 30 include stable on heating glass tube 7, with the heating wire 6 that interts in described glass tube 7, insert described glass tube 7 with pine, surround the metal tube 11 of its periphery, with the leading part 13 of support from the double-end described heating wire 6 of described glass tube 7, and roughly seal the heat resisting seal cover 12 of the both ends open (Fig. 2) of described metal tube 11 or described metal tube 11 and described glass tube 7 both sides' both ends open (Fig. 1), 12, be the dual structure of outside metal tube 11 and inner glass pipe 7, with the surface area of the outer surface that increases metal tube 11, the structure that reduces the temperature of outer surface is basic.And, seal glass tube 7 shown in Figure 2 both ends open be the ceramic seal member 14 of for example good heat resistance.
Described Defrost heater 20,30 is not with glass tube owing to the outside but constitutes with metal tube 11, the danger of the borneol damage that is not therefore fallen from described evaporimeter 3.Therefore do not need former pharoid 10 necessary umbrellas 4, can be as shown in Figure 9 near the evaporimeter 3 and the configuration Defrost heater 20 (30) between the dish 9 that uncovers.And, can make metal tube contact evaporator 3 that Defrost heater 20 (30) is installed as shown in Figure 10, can improve the efficiency of heating surface significantly.In addition, when contacting configuration, be square if make the section configuration of metal tube 11 with existing evaporimeter 3, increase contact area in addition, improve the advantage of the efficiency of heating surface by direct heat conduction.
Certainly, because being in heat resisting seal covers 12 such as the inside of the metal tube 11 of high temperature, inboard glass tube 7, heating wire 6 usefulness silicon is roughly sealing, therefore, HC cold-producing medium R600a was leaked, also because enter into half that the concentration of the HC cold-producing medium of the heater inside that is in the above high temperature of ignition temperature is less than LEL, so safety.
As described glass tube 7, use round tube with the same good heat resistance of former pharoid 10.And heat resisting seal cover 12 is silicon seal cover (suitably processing and forming becomes arbitrary shape) preferably.And heating wire 6 adopts winding heater the same as before.And though described metal tube 11 can use various pipes such as high copper pipe of pyroconductivity or aluminum pipe, from processability, low cost, advantage such as in light weight, aluminum pipe is best.Its section configuration, the section that wall thickness t=0.5～3 shown in Fig. 3 (a) millimeter and external diameter φ are 18～50 millimeters is circular pipe, and perhaps the quadrangle of wall thickness t=0.5～3 shown in Fig. 3 (b) millimeter and maximum outside diameter d=18～50 millimeter, hexagon etc. are square is typical shape.Above-mentioned scope realizes that conduct is with HC cold-producing medium, particularly R600a (iso-butane) best surface temperature and the defrosting time as the Defrost heater of the household electric refrigerator of cold-producing medium use.
Fig. 4 is the described pharoid 10 of the substance glass tube (10.5 millimeters of φ, 1 millimeter of wall thickness) of former band aluminium umbrella, glass tube and the Defrost heater that constitutes of the aluminum pipe of 18 millimeters of φ, 1 millimeter of wall thickness by 10.5 millimeters of φ, 1 millimeter of wall thickness of the present invention, and the curve map of the heat time heating time-surface temperature of Defrost heater (any all is 100 volts, 130 watts) when carrying out the open space experiment condition that constitutes by the aluminum pipe of the glass tube of 10.5 millimeters of φ, 1 millimeter of wall thickness and 25 millimeters of φ, 1 millimeter of wall thickness (use respectively ◆ point, ■ point and ▲ represent eyeball).
As can understanding from this figure, pharoid 10 in the past (◆ point) has surpassed 394 ℃ of the autonomous normal temperatures of JEMA point-blank, but Defrost heater of the present invention (the ■ point, ▲ point) all do not surpass the autonomous normal temperature of JEMA, be stabilized near 324 ℃ and 262 ℃ about 8 minutes.As can judging from figure, can reduce surface temperature though increase the external diameter of aluminum pipe, if but make diameter phi excessive, excessive with the space of managing inner glass tube 7, then the thermal capacity as heater body has increased, caloric value for identical time per unit, the outer surface of aluminum pipe is difficult to be heated, and can not reach this original purpose of frost of removing evaporimeter 3 at short notice.Therefore, as being the heater of purpose,, we can say that 0.5～3 millimeter of wall thickness, external diameter φ are best scope for 18～30 millimeters if the size of its aluminum pipe is taken into account the autonomous normal temperature of JEMA, for pipe with defrosting in the short time.
Heat time heating time when Fig. 5, Fig. 6, Fig. 7 are respectively 150 watts, 130 watts, 98 watts the refrigerator pipeline configuration internal space experiment (23 ℃ of room temperatures) of Defrost heater of the present invention (the quadrangle section that 10.5 millimeters of external diameters, 1.00 millimeters of wall thickness, long 310 millimeters glass tube and wall thickness are 2 millimeters, 20 millimeters * 20 millimeters, long 285 millimeters aluminum pipes) for heating power in the time of 100 volts is to the temperature changing curve diagram of the outer surface of aluminum pipe (◆ point), the face of trying to get to the heart of a matter that uncovers (■ point).Judge that from curve any of 98 watts, 130 watts and 150 watts all satisfies the requirement of 394 ℃ of the autonomous normal temperatures of JEMA.▲ a side temperature for the seal cover after stable.
Fig. 8 is under the state below the evaporimeter that has freezed that is configured in the refrigerator pipeline configuration, heat time heating time-the temperature changing curve diagram (23 ℃ of room temperatures) of the each several part of Defrost heater of the present invention (100 volts, 150 watts, 285 millimeters of the quadrangle section that the aluminum pipe wall thickness is 2 millimeters, 20 millimeters * 20 millimeters, length).
As can judging from this figure, though the aluminum pipe internal temperature (◆ point) reach about 480 ℃ for 394 ℃ above the autonomous normal temperature of JEMA, aluminum tube surfaces temperature (■ point) is controlled in about 320 ℃, is stabilized in below the autonomous normal temperature of JEMA.The side temperature of heat resisting seal cover was 117 ℃ (● point) after 85 minutes.Can judge, both make under current conditions also have sufficient redundancy, satisfy the requirement of the autonomous normal temperature of JEMA at 150 watt-hours.
As the 3rd example, method as the thermal diffusivity that improves described metal tube 11, by making internal diameter is 18 millimeter, by being provided with the metal tube 21 of concavo-convex fin 22 on the outer peripheral face that adopts metal tube as shown in Figure 11, the external surface area of metal tube 21 is increased, make the heat of metal tube 21 inboards not stagnate, distribute, surface temperature is reduced, so also can think a kind of good form.This fin 22 can be processed the metal tube moulding of aluminum pipe etc. with roll forming.
Secondly, as the 4th example, if adopt as shown in Figure 12, the outer surface of the metal tube 11 of described Defrost heater extend with the such structure of metal dish 9 metallic interconnects that link to each other (aluminium sheet or copper coin) 18 of uncovering such as aluminium (as shown in the figure, metallic interconnect 18 also can be the part formation as metal tube 11), uncover dish 9 and metal tube 11 can be realized because heat conducting heat integrated, in other words, the dish 9 that uncovers plays the effect of fin, can make all or part of heaterization of the panel surface that uncovers.So, roomy area can be heated to lower temperature (below 100 ℃), if near the below that is configured in evaporimeter, then become compact conformation, heat effective, as to have high security Defrost heater.
Family expenses are freezing though Defrost heater of the present invention can be installed in, near the position arbitrarily of the described evaporimeter 3 of refrigerator (with reference to Fig. 9, Figure 10), but where no matter be contained in, owing to there is not umbrella 4 between former pharoid 10 and the evaporimeter 3, so can thinks and to save energy about 30% at least.
In addition, owing to be purpose with the radiation before inboard glass tube 7 does not resemble among the present invention, but, can reduce cost heating wire 6 is remained on inside, prevent that heating wire from owing to lax electric leakage of being heated is that purpose is used, therefore needn't stick to quality as pharoid.
Claims (5)
1. the Defrost heater of a household electric refrigerator, it is characterized in that: include glass tube, with the heating wire that interts in described glass tube, insert described glass tube with pine, surround the metal tube of its periphery and support from the leading part of the double-end described heating wire of described glass tube and roughly seal the both ends open of described metal tube or the heat resisting seal cover of described metal tube and described glass tube both sides' both ends open.
2. the Defrost heater of household electric refrigerator as claimed in claim 1, it is characterized in that: described metal tube is that 0.5～3 millimeter of wall thickness and maximum outside diameter are 18～50 millimeters aluminum pipe.
3. the Defrost heater of household electric refrigerator as claimed in claim 1, it is characterized in that: the section profile of described metal tube is square.
4. the Defrost heater of household electric refrigerator as claimed in claim 1 is characterized in that: implement fin processing at the outer surface of described metal tube.
5. the Defrost heater of household electric refrigerator as claimed in claim 1 is characterized in that: the outer surface of described metal tube extends the metallic interconnect that links to each other with the metal dish that uncovers.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002202434A JP2004044899A (en) | 2002-07-11 | 2002-07-11 | Defrosting heater for household refrigerator |
| JP202434/2002 | 2002-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1467467A true CN1467467A (en) | 2004-01-14 |
Family
ID=29997143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031234119A Pending CN1467467A (en) | 2002-07-11 | 2003-05-06 | Defrosting heater of household refrigerator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2004044899A (en) |
| KR (1) | KR20040007207A (en) |
| CN (1) | CN1467467A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362297C (en) * | 2004-08-25 | 2008-01-16 | 日立空调·家用电器株式会社 | Refrigerator |
| CN109561530A (en) * | 2018-12-12 | 2019-04-02 | 重庆金鸿电气工程有限公司 | A kind of critical heat flux density test Special electrical heating pipe and its manufacturing method |
| CN110100138A (en) * | 2016-12-23 | 2019-08-06 | 荷兰联合利华有限公司 | Reach in freezer and method for reequiping reach in freezer |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4332485B2 (en) * | 2004-10-12 | 2009-09-16 | 日立アプライアンス株式会社 | refrigerator |
| JP4500645B2 (en) * | 2004-10-12 | 2010-07-14 | 日立アプライアンス株式会社 | refrigerator |
| KR200447199Y1 (en) * | 2007-05-14 | 2010-01-06 | 최홍천 | Metal Positive Temperature Coefficient Heater for heating a gas or air |
| JP5206039B2 (en) * | 2008-03-12 | 2013-06-12 | パナソニック株式会社 | Heat exchanger |
| FR3026830B1 (en) * | 2014-10-01 | 2019-05-10 | Jean Francois Bouteille | DEVICE FOR EXTRACTING DEFROSTING DEFROSTING RESISTOR FROM FRIGORIFIC AND REFRIGERATED EVAPORATORS BY ELECTRICAL ENERGY AND DEVICE FOR IMPLEMENTING THE SAME |
| CN105208693A (en) * | 2015-09-15 | 2015-12-30 | 安徽省宁国天成电工有限公司 | Novel steel pipe heater |
| JP6921309B2 (en) * | 2018-04-03 | 2021-08-18 | 三菱電機株式会社 | refrigerator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06269637A (en) * | 1993-03-22 | 1994-09-27 | Matsushita Refrig Co Ltd | Deodorization heater |
| KR970014651U (en) * | 1995-09-26 | 1997-04-28 | Protective panel of defrost heater for refrigerator | |
| KR19990020178U (en) * | 1997-11-24 | 1999-06-15 | 전주범 | Defrost Heater Cover of Refrigerator |
| KR19990027593U (en) * | 1997-12-24 | 1999-07-15 | 윤종용 | Defrost Heater Cover |
| KR20000001518U (en) * | 1998-06-26 | 2000-01-25 | 윤종용 | Defroster of refrigerator |
| KR200220616Y1 (en) * | 1998-11-30 | 2001-06-01 | 전주범 | A defrosting device of a refrigerator |
| KR100561543B1 (en) * | 1999-12-30 | 2006-03-17 | 삼성전자주식회사 | Defrost heater for refrigerator and manufacturing method thereof |
-
2002
- 2002-07-11 JP JP2002202434A patent/JP2004044899A/en active Pending
- 2002-12-14 KR KR1020020079925A patent/KR20040007207A/en not_active Application Discontinuation
-
2003
- 2003-05-06 CN CNA031234119A patent/CN1467467A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362297C (en) * | 2004-08-25 | 2008-01-16 | 日立空调·家用电器株式会社 | Refrigerator |
| CN110100138A (en) * | 2016-12-23 | 2019-08-06 | 荷兰联合利华有限公司 | Reach in freezer and method for reequiping reach in freezer |
| CN110100138B (en) * | 2016-12-23 | 2021-08-13 | 荷兰联合利华有限公司 | Freezer and method for retrofitting a freezer |
| CN109561530A (en) * | 2018-12-12 | 2019-04-02 | 重庆金鸿电气工程有限公司 | A kind of critical heat flux density test Special electrical heating pipe and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004044899A (en) | 2004-02-12 |
| KR20040007207A (en) | 2004-01-24 |
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