CN100362297C - Refrigerator - Google Patents
Refrigerator Download PDFInfo
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- CN100362297C CN100362297C CNB2005100555504A CN200510055550A CN100362297C CN 100362297 C CN100362297 C CN 100362297C CN B2005100555504 A CNB2005100555504 A CN B2005100555504A CN 200510055550 A CN200510055550 A CN 200510055550A CN 100362297 C CN100362297 C CN 100362297C
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- glass tube
- cooler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Defrosting Systems (AREA)
Abstract
To provide a refrigerator with superior reliability, capable of improving safety and efficiency even during defrosting operation of the refrigerator using an inflammable refrigerant. The refrigerator wherein a defrosting heater 11 having a heater wire wound like a coil in a glass tube is provided below a cooler 10 is provided with a heat dissipation member 16 in an outer circumference of the glass tube. The heat dissipation member 16 is provided in the outer circumference of the glass tube facing a coil part of the heater wire.
Description
Technical field
The present invention relates to have attached in the refrigerator of freeze cycle the refrigerator of the Defrost heater of defrosting.
Background technology
Patent documentation 1 (Japanese kokai publication hei 8-54172) is the relevant prior art of the refrigerator of Defrost heater that has.In this example, below cooler, have with the kuromore filament winding and become coiled type, coat the tubular heater of defrosting with glass tube.Between the tubular heater of this cooler and defrosting, be provided with ceiling, to prevent from directly to contact the tubular heater of defrosting from the defrost water that cooler drips down.In addition, in order to protect tank, between the tank of the tubular heater of defrosting and its underpart, be provided with the base plate that keeps electric insulation; to prevent under the situation that the heater of defrosting damages; heater wire hangs down on the tank, damages tank, and prevents to leak electricity by defrost water.
In addition, in patent documentation 2 (TOHKEMY 2000-283635), put down in writing heater wire has been arranged in the armouring pipe that seals with filling insulating material, on the periphery of armouring pipe, have the fin that promotes heat transfer effect, and can be controlled at Defrost heater below the firing temperature of cold-producing medium iso-butane to the temperature of Defrost heater.
Below, the statement problems of the prior art.
Figure 11 is the schematic diagram of refrigerator in the past.In Figure 11, label 51 is refrigerator main bodies, in the inside of this refrigerator main body 51, refrigerating chamber 52 and refrigerating chamber 53 is arranged, and the median septum 56 that these two chambers are separated.The refrigerating chamber door 54 of closing this opening portion is arranged on the opening portion of refrigerating chamber 52 fronts, the refrigerating-chamber door 55 of closing this opening portion is arranged on the opening portion of refrigerating chamber 53 fronts.
On median septum 56, be provided with the cold air that the food of transference in the refrigerating chamber 52 carried out after the heat exchange and return the passage 57 that goes in the cooler described later, and the food in the transference refrigerating chamber 53 have carried out heat exchange cold air afterwards and returned the passage 58 that cooler goes.Be communicated with the cooler chamber 59 of refrigerating chamber 52 and refrigerating chamber 53 by passage 57 and passage 58, be arranged on the back of refrigerating chamber 52, in this cooler chamber 59, be provided with cooler 60, Defrost heater 61 and circulating cold air fan 62.Between cooler chamber 59 and refrigerating chamber 52, be provided with the interval 63 that these two chambers are separated, and on this interval 63, form cold air outlet 64.By means of this structure, just can utilize cool air circulation fan 62, chilled cold air after carrying out heat exchange with cooler 60 is entered in the refrigerating chamber 52 from cold air outlet 64.
Between Defrost heater 61 and cooler 60, be provided with the ceiling 65 of aluminum, like this, when the heat handle of usefulness Defrost heater melts attached to the frost on this ceiling, just can prevent from directly to drop on the Defrost heater from the defrost water that cooler 60 drips down.
Usually, the glass tube 61a of Defrost heater, at defrosting electrical heating wire 61b adstante febre, its surface temperature is near 500 ℃.When water droplet directly dropped on this glass tube, steam just was in the outburst state, can produce very big sound.If be near under this steam outburst state, the sound that is produced almost can both be heard in the refrigerator outside, will make the user feel dangerous.The effect that ceiling 65 is set just is to prevent this sound.
In the bottom of Defrost heater 61, be provided with the baffle 66 of aluminum, this block protection plate 66 is at glass tube 61a because bump etc. are former thereby when breaking, protection tank 67.Figure 12 represents as glass tube 61a because the former thereby state that breaks such as bump; electrical heating wire 61b as shown in Figure 12 hung down like that; this block protection plate is exactly the tank 67 that prevents that this electrical heating wire 61b contact pressure resin from making; this tank is to accept the defrost water that drips down from cooler 60, so that help to the externally drained usefulness of refrigerator.Because the baffle of this aluminum 66 is to remain insulation, so even electrical heating wire 61b hangs down on this block protection plate 66, also the metal that can not allow electricity leak into refrigerator main body 51 partly goes.
Under the situation of cooling refrigerating chamber 52 and refrigerating chamber 53, make cold-producing medium flow through cooler 60, so that cooler 60 coolings.Meanwhile, by means of the effect of the cool air circulation fan 62 that is turning round, because of contact with cooler 60 carried out cold air that heat exchange has been cooled from cold air outlet 64 rows to refrigerating chamber 52.Enter the food in the chilled air cools refrigerating chamber 52 in the refrigerating chamber 52,, return once more in cooler 60, Defrost heater 61 parts through passage 57.On the other hand, in refrigerating chamber 53 1 sides, with the cool air circulation fan 62 feasible cold airs that cooled off by cooler 60, the refrigerator designated lane of not representing among the use figure enters in the refrigerating chamber 53.And carry out heat exchange with chilled food here, make the food cooling.Then, the cold air after the cooling returns in cooler 60 and Defrost heater 61 parts by passage 58.
Because because of the switch of refrigerating chamber door 54 and refrigerating-chamber door 55 flows into air outside, and the evaporation of the moisture that food contained in refrigerating chamber 52 and refrigerating chamber 53, so the air that carries out heat exchange with cooler 60 is the very high air of humidity, this malaria can frosting on cooler 60, and piles up.Along with the increase of accumulating amount, just hindered the surface of cooler 60 and carried out heat transfer between the air of heat exchange, and the resistance that ventilates increased, air quantity just reduces.As a result, the transport of heat descends, and not enough situation has taken place to cool off.
Therefore, before this cooling inadequately takes place, just begin to Defrost heater 61 energisings.When electrical heating wire 61b begins to switch on, just pass through glass tube 61a to cooler 60 and part radiant heat on every side from electrical heating wire 61b.At this moment, be transmitted into the ultrared part on the baffle 66, the profile from baffle 66 reflexes on the electrical heating wire 61b by glass tube 61a again.In addition, the defrost water of melting by means of the heat that emits from Defrost heater, a part directly drop in the tank 67, and other parts then drop on the ceiling 65.In addition, lower because this ceiling 65 and glass tube 61a compare temperature, so can not reach the degree that the steam outburst takes place here.
Usually, the much less surface of the electrical heating wire 61b of Defrost heater 61, the surface temperature of glass tube 61a has also reached very high temperature.This be because, baffle 66 be in Defrost heater 61 near, in case when reflecting back by the protected plate 66 of the heat of glass tube radiation, not only glass tube 61a, and electrical heating wire 61b also can be heated unusually.As a result, the rubber chock plug at sealing Defrost heater 61 two ends just may damage because of overheated.
In addition; in order to protect the rubber chock plug injury-free; electrical heating wire 61b as if the coil-end head (not being coil shape) that the electrical heating wire end is made does very longly with the straight line portion that the folding back of predetermined length is twisted into; do one regularly in the length of glass tube etc.; also exist and melt very slowly, prolonged the problem of defrosting time and so on attached to the frost on the cooler 60 on end turn top.
Also have, with regard to the Defrost heater 61 of shape as shown in the figure, since its size with respect to the dimension D 1 of the depth direction of cooler 60 little to only be its 1/4～1/5, thereby exist radiant heat not reach the entire depth dimension D 1 (as shown in figure 13) of cooler 60 and problem that the time of defrosting is grown.
In addition, put down in writing, coating with insulating materials in the structure of electrical heating wire as patent documentation 2, also there is following point: when electrical heating wire is switched on, because electrical heating wire produces heat, not only the armouring pipe is heated, and the electrical heating wire 61b that has coated insulating materials also has been heated itself.In above-mentioned patent documentation 2 owing to sealed the two ends of armouring pipe with lid, so, when coat with insulating materials electrical heating wire 61b around the time, will conduct heat to lid by insulating materials.At this moment, even the lid use is the very high material of the such heat-resistant quality of silicon rubber, its heat resisting temperature also has only about 145 ℃, if temperature is higher than this heat resisting temperature, will damage lid.In this case, just must between insulating materials and lid, in addition heat-insulating material be set.
In addition, when the temperature of the generation heat of electrical heating wire being set low, the power output of Defrost heater has reduced, and has also just reduced as the performance of Defrost heater.On the other hand, when using the good material of heat-insulating property of insulating materials itself, the temperature of electrical heating wire just can not outwards be transmitted, and in this case, the performance of Defrost heater is reduced.Therefore, in order to ensure the power output of Defrost heater, must do the length of electrical heating wire 61b very longly, this will reduce the dischargeable capacity of refrigerator inside.
In addition and since Defrost heater itself be arranged in cooler near, under the usual operating condition of refrigerator, temperature on every side is subzero below 30 ℃.When the defrosting running,, shrink for the expansion of the big relatively like this variations in temperature of insulating materials and then do not give consideration though the temperature of electrical heating wire when energising will reach several Baidu.In addition, temperature of the electrical heating wire that coated insulating materials itself is not considered yet.
Summary of the invention
The present invention is in view of because of using combustible refrigerant to exist the problems referred to above to put forward, and its objective is provides a kind of refrigerator that helps improving energy-saving safe and defrosting efficiency.
For achieving the above object, the invention provides a kind of refrigerator, in the refrigerator body of thermal insulation, has the cooler that is connected in the freeze cycle that has encapsulated combustible refrigerant, and below above-mentioned cooler, disposed Defrost heater, it is characterized in that above-mentioned Defrost heater has following each several part: have coiler part that in glass tube, is wound into coiled type and the electrical heating wire that is positioned at the straight line portion of these coiler part both sides; Two ends with the above-mentioned glass tube of sealing are the seal member of the lead that makes above-mentioned electrical heating wire or be connected with the above-mentioned electrical heating wire inside and outside hole portion by being communicated with above-mentioned glass tube; And be arranged to facing to above-mentioned coiler part, be arranged on diameter lamellar thermal component roughly the same or bigger, that be wound into coiled type on the periphery of glass tube length direction, internal diameter and above-mentioned glass tube, its thermal conductivity ratio is inserted the height that leads to above-mentioned glass tube wherein.
In addition, in above-mentioned refrigerator, between above-mentioned cooler and above-mentioned glass tube, have the ceiling parts; Above-mentioned thermal component is the laminal radiating fin that is wound on the above-mentioned glass tube; The width of above-mentioned radiating fin is made bigger than the width of above-mentioned ceiling, and is littler than the width of above-mentioned cooler depth direction, and the Outboard Sections on above-mentioned radiating fin perspective plane below above-mentioned ceiling parts is the shape of extending along vertical direction.In addition, between above-mentioned cooler and above-mentioned glass tube, have the ceiling parts, and have accessory that above-mentioned thermal component and above-mentioned ceiling parts are coupled together Defrost heater as thermal component.
And, be decided to be below the 2.0mm by coiling pitch above-mentioned coiler part, do the pitch of above-mentioned thermal component greatlyyer than the pitch of above-mentioned coiler part, and the distance between above-mentioned coiler part and the above-mentioned glass tube fixed on below the 1mm, thereby the heating temp that makes above-mentioned electrical heating wire drops to below 400 ℃, is lower than the firing temperature of combustible refrigerant.
Adopt the present invention,, in addition, can also provide reliability good refrigerator even the refrigerator that uses combustible refrigerant also can improve its security performance and defrosting efficiency when the defrosting running.
Description of drawings
Fig. 1 is the skiagraph with refrigerator of the present invention;
Fig. 2 is the enlarged drawing that Fig. 1 wants portion;
Fig. 3 is the key diagram in the Defrost heater cross section among Fig. 2;
Fig. 4 is the key diagram of the radiating fin among Fig. 3;
Fig. 5 is the cross section key diagram of the Defrost heater of the explanation embodiment different with Fig. 3;
Fig. 6 is the key diagram of the radiating fin among Fig. 5;
Fig. 7 is the stereogram of the radiating fin of the explanation embodiment different with Fig. 5;
Fig. 8 is that the P of Fig. 7 is to view;
Fig. 9 is the cross section key diagram with Defrost heater of the present invention;
Figure 10 is the key diagram with freeze cycle of the present invention;
Figure 11 is the skiagraph of refrigerator in the past;
Figure 12 is the cross section key diagram of Figure 11;
Figure 13 is the vertical section key diagram of Figure 11.
The specific embodiment
Below, with reference to Fig. 1～Figure 10 embodiments of the invention are described.
Fig. 1 is the skiagraph with refrigerator of the present invention; Fig. 2 is the enlarged drawing that Fig. 1 wants portion; Fig. 3 is the key diagram in the Defrost heater cross section among Fig. 2; Fig. 4 is the key diagram of the radiating fin among Fig. 3; Fig. 5 is the cross section key diagram of the Defrost heater of the explanation embodiment different with Fig. 3; Fig. 6 is the key diagram of the radiating fin among Fig. 5; Fig. 7 is the stereogram of the radiating fin of the explanation embodiment different with Fig. 5; Fig. 8 is that the P of Fig. 7 is to view; Fig. 9 is the cross section key diagram with Defrost heater of the present invention; Figure 10 is the key diagram with freeze cycle of the present invention;
First embodiment
At first, with reference to Fig. 1～Fig. 4 first embodiment is described.Refrigerator main body 1 portion within it has refrigerating chamber 2 and refrigerating chamber 3.In the front of refrigerating chamber 2, have the refrigerating chamber door 4 of closing opening portion, in the front of refrigerating chamber 3, have the refrigerating-chamber door 5 of closing opening portion.Between refrigerating chamber 2 and refrigerating chamber 3, be provided with isolated median septum 6 with two chambers.At median septum 6 places, the cold air after the heat that has been provided with food exchange in the transference refrigerating chamber 2 returns the passage 7 that goes in the cooler described later, and the food exchange in the transference refrigerating chamber 3 cold air after the heat return the passage 8 that goes in the cooler.
Arranged at the back of refrigerating chamber 2 and in this cooler chamber 9, to be provided with cooler 10, Defrost heater 11, cool air circulation fan 12 in the cooler chamber 9 that separates with dividing plate 13.In the present embodiment, Defrost heater 11 is arranged in the below of cooler 10, by means of the cool air circulation fan 12 that is arranged in the cooler top, the cold air that returns that flows in the cooler chamber 9 from the below is carried upward.The cold air of Shu Songing is cooled off by cooler 10 upward, enters in the refrigerating chamber 2 from the cold air outlet 14 that is arranged on the dividing plate 13 again.
Between Defrost heater 11 and cooler 10, be provided with the ceiling 15 of aluminum.Frost on being attached to cooler 10 is by in the process that heat melted of Defrost heater 11, and this ceiling 15 has prevented from directly to drop on the Defrost heater 11 from the defrost water that cooler drips for 10 times.Usually, the surface temperature of the glass tube 11a of Defrost heater 11 when Defrost heater 11 produces heat is about 500 ℃.If water droplet directly drops on this glass tube 11a, will cause the state of steam outburst, the degree that its sound can both be heard to the refrigerator outside greatly can make the user feel uneasy.The effect of ceiling 15 just is to prevent this situation.
On the periphery of the glass tube 11a of Defrost heater 11, disposed thermal component.In the present embodiment, on the periphery of glass tube 11a, the reeling radiating fin 16 of fin shape.This radiating fin 16 is that coiled sheet is wound into as shown in Figure 4 shape.Roughly the external diameter with glass tube 11a is identical having this coiled sheet, perhaps than on the bigger slightly plug of its external diameter, is wound into the shape that is similar to coil continuously, and then it is cut into the size of regulation.In addition, when coiled sheet is wound into coil shape, by at its neighboring upper cut or dwindle modes such as its inner circumferential edge and carry out.In the present embodiment, by means of a side that shortens coiled sheet, thereby make centre bore 16a become waveform and form coiled type.With compare in the situation of neighboring upper cut also big with the contact area of glass tube 11a in addition because the integral heat sink area of radiating fin 16 increased, therefore, can be with higher efficient heat radiation.
Because the diameter of the glass tube 11a in the present embodiment is 10.5mm, so the diameter of the plug of coiling coiled sheet is set in about 11.0～11.5mm.As a result, when being installed to the radiating fin 16 that is wound into coiled type on the glass tube 11a, the glass tube 11a that can at an easy rate the centre bore 16a that makes 11.0～11.5mm be passed 10.5mm also overlaps thereon.
And above-mentioned radiating fin 16 can also play replacement baffle in the past.Promptly, when even above-mentioned glass tube 11a occurs breaking because of certain bump, make the radiating fin 16 of reeling along the whole length direction of glass tube 11a, also can support electrical heating wire 11b because glass tube 11a is broken, thereby can be as not in the past, glass tube 11a one breakage, electrical heating wire 11b will hang down.
In the present embodiment, make radiating fin 16 with aluminum.By means of using the high parts of thermal conductivity ratio glass tube 11a, just can outwards distribute the heat of electrical heating wire 11b with high efficiency.In addition, adopt glass tube 11a around reel in the present embodiment of structure of radiating fin 16, if the weight of radiating fin 16 is very heavy, will form very big load to glass tube 11a, can make glass tube 11a damaged easily.Therefore, in the good material of thermal conductivity, selected for use weight ratio copper light, formability is also good, the aluminium that cost is also cheap.
Promptly, owing to being wound on the plug identical with the external diameter of glass tube continuously, coiled sheet makes radiating fin, then it is cut into the size of regulation and make radiating fin, thereby obviously, productivity ratio height not only, and being installed to when glass tube gets on, owing to can insert glass tube in the hole made from plug, thereby not only can install at an easy rate, also be very beneficial for reducing cost.
Then, the above-mentioned Defrost heater 11 in the key diagram 3.This Defrost heater 11 is to be 10.5mm at external diameter, and internal diameter is that the glass tube 11a inside of 8.5mm is provided with electrical heating wire 11b, and has the seal member 17 of two ends of this root glass tube of sealing.Parts shown in the label 18 are positioning elements, and the effect of this positioning element 18 will be in aftermentioned.
The two ends of electrical heating wire 11b are connected on the lead 19, and on these two coupling parts, the straight line portion 11c that is provided with electrical heating wire 11b is connected the union piece 21 of usefulness with lead 19.This Defrost heater 11 is that line directly is wound into the electrical heating wire 11b that external diameter is the coiled type of 7.0mm for the kuromore silk of 0.5mm, with the dividing plate shown in the figure 18 it being encapsulated in diameter is 10.5mm, wall thickness is in the glass tube of 1mm, and then with the two ends of seal member 17 sealed glass tube 11a.In the present embodiment, use the rubber chock plug as seal member 17.
In addition, be wound into the two ends of coiler part of the electrical heating wire 11b of coiled type, make the straight line portion 11c of the rectilinear form that has as shown in Figure 3.This is the heat loss rubber chock plug 17 in order to prevent that electrical heating wire 11b from being produced.Though rubber chock plug 17 is to make with the very high material of the heat resistance of silicon rubber and so on, the heat resisting temperature of this rubber chock plug 17 is usually also below 145 ℃., the temperature of the coiler part of electrical heating wire 11b is up to 500 ℃, and is more much higher than the heat resisting temperature of rubber chock plug 17.This be because, have the electrical heating wire 11b that produces heat in glass tube 11a inside, add from the ceiling of top and the heats by reflecting back such as baffle of below, make temperature rise more.Under such temperature, if so many heats are conducted to rubber chock plug 17, rubber chock plug 17 will damage because of high temperature.
, the caloric value original owing to straight line portion 11c is little, can not reach 500 ℃.Therefore, in the present embodiment, make at the two ends of the coiler part of electrical heating wire 11b and to have straight line portion 11c.By means of this structure, just can stop the heat of electrical heating wire 11b and glass tube 11a to conduct to rubber chock plug 17.
Though, the distance of this straight line portion 11c is long more, prevent the heat conducting effect of rubber chock plug 17 just big more, but, if distance is long, this distance will reduce the usefulness of Defrost heater, so should be a heat resisting temperature of having taken all factors into consideration rubber chock plug 17 and afterwards distance of the heating temp of electrical heating wire 11b (15mm～20mm) for example.Promptly, if the length of this straight line portion 11c is long, though can stop rubber chock plug 17 to damage because of overheated, but, in limited size, be this straight line portion 11c longly like this, the height that power density (caloric value of per unit length) will be carried has very played the effect of the temperature of the coiler part that improves electrical heating wire 11b.Therefore, be set at 15mm～20mm usually.In the present embodiment, make coiler part be positioned at the middle body of glass tube 11a, in other words, be with positioning element 18 the set positions of coiler part between rubber chock plug 17 and glass tube 11a, so that the length of the straight line portion 11c at two ends is identical.Like this, electrical heating wire 11b is at two ends under the state of location and generates heat, and has prevented to transmit too much heat to rubber chock plug 17, and has distributed the heat that the coil portion branch produces to the outside expeditiously by radiating fin 16, thereby improved reliability.
Promptly, as mentioned above, because the thermal conductivity ratio glass tube 11a height of radiating fin 16, and the inside that radiating fin 16 is arranged in glass tube 11a is provided with on that part of coiler part, thereby have and to make the temperature that can rise in glass tube 11a inside about 500 ℃, for example be reduced near the effect 350 ℃.If the length of the peripheral direction of radiating fin 16 is enough long, heat dispersion is also fine, even the pitch of fin 16 big than coiler part also can have sufficient radiating effect.Like this, by means of using area of dissipation and the good radiating fin 16 of pyroconductivity, make that radiating fin 16 can be after carrying out heat exchange with glass tube 11a, the surface temperature of glass tube 11a is reduced to 300 ℃ from 350 ℃, then the temperature of electrical heating wire 11b self just can be reduced near 350 ℃.
On the other hand, also as shown in Figure 2, carry out heat exchange radiating fin 16 afterwards, heat is diffused to the whole zone of the depth dimensions D2 of cooler 10 with glass tube 11a.In other words, because the size of above-mentioned radiating fin 16 is done greatlyyer than the size L1 of ceiling 15, so its size can be done as far as possible near the depth dimensions D2 of cooler 10.Therefore, part beyond the perspective plane that is positioned at ceiling 15 belows of this radiating fin 16, though the situation that has defrost water to drip down from cooler 10 is because that part of radiating fin nearly all is the shape of extending vertically, so the defrost water that drips down can not accumulated.
By means of radiating fin 16 is made this size, for melting attached to the tank 20 of accepting defrost water in defrosting, perhaps the frost on the passage 7,8 is favourable, can shorten the defrosting time of cooler 10 obviously.
In having the refrigerator of this structure, the amount of frost when increasing on being deposited in cooler 10 will hinder the heat transmission between cooler 10 surfaces and the air that carries out heat exchange, reduces the resistance of ventilation.Refrigerator just begins to Defrost heater 10 energisings after detecting this situation.
When beginning when electrical heating wire 11b switches on, just pass through glass tube 11a, radiating fin 16 to cooler 10 and the part radiations heat energy around it from electrical heating wire 11b.Like this, just being melted into defrost water attached to the frost on cooler 10 and tank 20 and so on.
At this moment, have the Defrost heater of the present invention of radiating fin 16, because very thin glass tube 11a is made the radiating fin also bigger than ceiling L1, so can on the very big area of scope, heat the lower end of cooler 10.So just help shortening the time of defrosting.
Meanwhile, even under the situation of the accident that glass tube 11a breaks and so on, because above-mentioned radiating fin 16 is installed on the periphery of glass tube 11a, so, glass tube 11a can not take place yet to be collapsed broken, electrical heating wire 11b hangs down into the outside of glass tube 11a, the such thing of part around the damage.
Also have, when glass tube 11a breaks, also less than problems such as the metal to refrigerator main body 1 as in the past partly leak electricity.
Second embodiment
Below, with reference to Fig. 5, Fig. 6 explanation embodiment different with first embodiment.Have following parts in the structure of Defrost heater 11: glass tube 11a, electrical heating wire 11b, rubber chock plug 17.Electrical heating wire 11b has straight line portion 11c at its two ends.Straight line portion 11c is connected with lead 19 by the union piece 21 that is positioned at rubber chock plug 17.The thermal component 22 of on the periphery of glass tube 11a, reeling.This thermal component 22 is the parts that strip (metal wire) parts are wound into coiled type.Radiating fin 16 illustrated among this radiating fin 22 and first embodiment is compared, owing to there not be very big area of dissipation, the pitch of coiling is very narrow.This radiating fin 22, though can not do the power output as the electrical heating wire 11b of source of heat release greatly as first embodiment, but, by the integral heat sink amount, for example, after dropping to 140W from 160W, recombinant is got up, and just can make the temperature of glass tube 11a, electrical heating wire 11b drop to desired temperature.That is, the heat transferred radiating fin 22 of the glass tube 11a that has been heated promotes defrosting by radiating fin 22 again.Like this, just can reduce the temperature of glass tube 11a, electrical heating wire 11b significantly.And then, even when the accident that glass tube 11a breaks, because it is broken to prevent that glass tube 11a from collapsing by means of radiating fin 22, so can make electrical heating wire 11b can not hang down.
The 3rd embodiment
With reference to Fig. 7, Fig. 8 explanation embodiment different with first and second embodiment.
Among the figure, the thermal component 23 of present embodiment is made the roof of the door shape that has thermal component (radiating fin).The level board on this roof 23, i.e. the defrost water that end face 23a acceptance drips down from cooler.Roof 23 has the vertical panel 23b as the both sides of accessory.The vertical panel 23b of these both sides has formed the radiating fin 24 of the heat of dispersing Defrost heater 11 (Fig. 2).
Promptly, on vertical panel 23b, got the hole 25 that can pass Defrost heater 11 in advance as the accessory of both sides, again shown in its image pattern 7,8 like that, staggering mutually curves inwardly, make these holes 25 aim at, again Defrost heater 11 is passed these holes 25.
Owing in this way one has been made on roof 23 and radiating fin 24, so, except being used as roof 23 radiating fin 24 neatly, because can also be the outlet of formed window 26 behind radiating fin 24 bending formings as the air after heating, thereby the heating after air can not accumulate in the roof 23 of a shape, go and can be sent to cooler one side.
At this moment, when the diameter of Defrost heater 11 was 10.5mm, made about 11.0～11.5mm in the aperture in hole 25, and the glass tube 11a of Defrost heater 11 just can successfully enter in this hole 25.
In addition, in the present embodiment, though on both direction, cut out narrow slit as the vertical panel 23b of the accessory on the roof 23 of door shape, by means of these narrow slits inwards bending form radiating fin, but because door shape has nothing to do with area of dissipation, can select it, so present embodiment is that a kind of applied in a flexible way in roof 23 is the technical scheme of the part of radiating fin 24.
By means of said structure, the part of the area of dissipation of glass tube 11a with radiating fin 24 enlarged.Like this, just can reduce the temperature of glass tube 11a significantly.In other words, obtained the effect of the temperature that reduces electrical heating wire 11b, rubber chock plug 17 (Fig. 3) just can not Yin Gaowen and damaged.
Also have, even glass tube 11a has broken, owing to there is radiating fin 24 supporting glass tube 11a, so, can not occur glass tube 11a yet and collapse brokenly, inner electrical heating wire 11b hangs down into the state of affairs that tank 20 (Fig. 2) is gone up and so on.
The 4th embodiment
Below, with reference to Fig. 9, Figure 10, illustrate Defrost heater is used for using the example of the iso-butane of hydrocarbon as the refrigerator of cold-producing medium.
Figure 10 represents the formation of freeze cycle, compressor 26, condenser 27, capillary 28, cooler 29 is together in series, and connects into ring-type, has just constituted freeze cycle.In the past, in the cold-producing medium in being encapsulated in this freeze cycle,, be easy to the processing aspect and set out, used fluorine class cold-producing medium always from the material stable performance.But this fluorine class cold-producing medium is gradually by to the destruction of ozone layer and the hydrocarbon cold-producing medium minimum to the influence of global warming, for example propane (R-290a) and iso-butane (R600a), replace.Hereinafter, this hydrocarbon class cold-producing medium is called the HC cold-producing medium.
So, in the freeze cycle of present embodiment, encapsulated this HC cold-producing medium.Grading at the weld part of cooler 29 has under the damaged situation, and this HC cold-producing medium can leak in the refrigerator when the defrosting running.
If refrigerator inside has been full of this HC cold-producing medium, at the Defrost heater adstante febre, the HC cold-producing medium just has the danger of catching fire.
That is, when the defrosting running, because cooler has been heated by Defrost heater, the pressure of the iso-butane in the cooler 29 is than atmospheric pressure height (about 3Kg/cm
2), will leak to refrigerator inside.In addition, when the cooling running, the iso-butane in the cooler is negative pressure with respect to atmosphere, and iso-butane just can not leak to refrigerator inside.Also have, usually,,, also can not leak basically to refrigerator inside because the pressure of the iso-butane in the cooler is roughly identical with atmospheric pressure even compressor shuts down.
As shown in figure 10, cool air circulation fan 30 and Defrost heater 31 near cooler 29, have been arranged.Usually, it is indoor that cooler 29 and Defrost heater 31 all are installed in cooler, and the running of the cool air circulation fan 30 by being arranged in cooler top is being sent in refrigerating chamber, the refrigerating chamber, with cooling food with cooler 29 cooled cold airs.In addition, equally, also utilize cool air circulation fan 30, the cold air that returns from refrigerating chamber or refrigerating chamber is delivered to the cooler chamber from the cooler below, these cold airs that return with after cooler 29 coolings, are delivered to these cold airs in refrigerating chamber or the refrigerating chamber once more.Like this, by cool air circulation fan 30 cold air is circulated.
In addition, Defrost heater 31 be on cooler 29, piled up white in, be used for melting the device of these frosts, its concrete structure as shown in Figure 9.It is such that the knot of Defrost heater 31 is purchased: electrical heating wire 31b is covered by glass tube 31a, this root electrical heating wire 31b is made of coiler part a and straight line portion b, when the internal diameter of glass tube 31a was 8.5mm, coiler part a was and is wound into the coil shape that external diameter is 7.5mm.At this moment, the distance between the inner periphery of the periphery of coiler part and glass tube 31a is about 0.5mm, that is, it is inner and make the inner surface of itself and glass tube very approaching that electrical heating wire 31b is arranged on glass tube 31a.In addition, the pitch between each circle of coiler part a is wound into below the 2.0mm.Like this, when a pitch of reeling being made 2.0mm when following, adjacent electrical heating wire just is affected mutually, thereby temperature is risen to more than the caloric value of coiler part a of electrical heating wire 31b own.And then, owing to the distance between the inner periphery that makes coiler part a and glass tube 31a approaches below the 1mm, so can rise to its heat transferred glass tube 31a more than caloric value to this temperature at an easy rate.
The temperature facing to the glass tube 31a of coiler part a with Defrost heater 31 of said structure will rise to the temperature near electrical heating wire 31b.In the present embodiment, because the external diameter of coiler part a is rolled into 7.5mm, the internal diameter of glass tube 31a is 8.5mm, so, on glass tube 31a facing to this a part of temperature of coiler part a just near the temperature of electrical heating wire 31b, under high like this temperature, the rubber chock plug 32 at two ends will damage because of high like this temperature.
The straight line portion b of electrical heating wire 31b refers to that part of electrical heating wire 31b being made rectilinear form for the damage that prevents two ends rubber chock plug 32.Because this a part of caloric value is inevitable seldom,, just can not reach temperature facing to that a part of glass tube 31a of coiler part a so glass tube 31a goes up that a part of temperature facing to this straight line portion b., when the length of this straight line portion b very in short-term owing to be subjected to the heat affecting of coiler part a, certainly also can be to the air themperature in the glass tube, glass tube 31a heating.Therefore, must guarantee that usually the size of L2 is more than 15mm.
End rubber chock plug 32 is the parts at sealed glass tube 31a two ends, is to make with the silicon rubber of hear resistance good (for example 145 ℃) etc.The positioning element 33 of electrical heating wire has constituted the end of glass tube 31a, is arranged on the end of glass tube 31a.By means of this positioning element 33, just can the coiler part a of electrical heating wire 31b be positioned.That is, this positioning element 33 can be arranged in coiler part a on the middle body of glass tube 31a length direction.
The position that connects the union piece 34 of straight line portion b and lead 35 is decided by the position of the positioning element 33 of front.Like this, when coiler part a is positioned, just can set end rubber chock plug 32 for given size with the size of the L2 of straight line portion b.
In the refrigerator of Defrost heater 31, on cooler 29, piled up frost, when needing defrosting, just begun to Defrost heater 31 energisings with this structure.When this Defrost heater was switched on, just in case under the situation that damaged position is arranged on the cooler 29, the HC cold-producing medium will leak out from this damaged position in beginning.Because this HC cold-producing medium, for example the firing temperature of iso-butane is 494 ℃, so be necessary to make the temperature of electrical heating wire 31b to be lower than this firing temperature.In the present embodiment, consider, be set in below 400 ℃, promptly 394 ℃ to safer.
That is, present embodiment is in front the Defrost heater 31 (glass tube 31a, electrical heating wire 31b) radiating fin 36 to be set, and makes its temperature below 394 ℃.This radiating fin 36 can be selected arbitrarily from shape shown in first, second or the 3rd embodiment and mode.Main is, can reduce the thermal component (radiating fin) of the temperature of Defrost heater 31, should be the thermal component that must the parts higher than glass tube 31a constitutes of pyroconductivity for example.Therefore, owing to be provided with the radiating fin that pyroconductivity is higher than the coiled type of glass tube 31a facing on the glass tube 31a of coiler part a, thereby just can the heat of being arranged near the coiler part a of the electrical heating wire 31b of glass tube 31a be distributed to the outside expeditiously.Therefore, even the pitch between each circle of coiler part a also can not reach the firing temperature of HC cold-producing medium less than 2.0mm.In addition, owing in the caloric value of coiler part a, pass to the heat of the end rubber chock plug 32 at two ends by glass tube 31a, owing to deduct the heat that dissipates from radiating fin, thereby can prevent the breakage of not-go-end rubber stopper head 32.
In addition, in the present embodiment,, not to consider the employed double glazing pipe heater of explosion-proof performance, but make the single-glass pipe for combustible refrigerant.In aforesaid single-glass pipe, owing to can reduce the temperature of glass tube 31a by means of radiating fin 36, can also reduce the temperature of air in the glass tube 31a by this effect, so can suppress to be arranged on the rising of the temperature of the electrical heating wire 31b in the glass tube, and can be reduced to the temperature of electrical heating wire 31b below 394 ℃ always.
Promptly, under the situation of using double-layer glass tube, air between inner layer glass tube and outer layer glass tube has played heat-insulating material, even added radiating fin, can not reduce the temperature of electrical heating wire immediately below 394 ℃, also must take other to change the methods such as pitch of coiling coil.Structure that present embodiment adopts and generation insulating air layer and between inside and outside layer glass tube like this in the different structure of in-problem double-layer glass tube aspect the thermal efficiency, because the heat of electrical heating wire 31b all passes through glass tube and has distributed to radiating fin, so the temperature of glass tube and electrical heating wire is reduced to below 394 ℃.In addition, the coiling pitch that can also make electrical heating wire 31b like this because around the heat of electrical heating wire 31b can be delivered to effectively by radiating fin 36, thereby can be carried out the defrosting of cooler 29 with power consumption seldom below 2.0mm.
Each embodiment of the present invention is because have aforesaid structure, so have following various effect.
Promptly, the electrical heating wire that is wound into coiled type is being contained in the glass tube, to be arranged in the refrigerator of cooler bottom with the defrosting heater of holding the rubber chock plug to seal its two ends, inner periphery contacts with the periphery of above-mentioned glass tube or approaching thermal component (radiating fin) is arranged between the end rubber chock plug because being mounted to, so, the heat of dispersing out from electrical heating wire can not turn back on the Defrost heater again, glass tube can not collapse brokenly when glass tube breaks, and can prevent that electrical heating wire from hanging down comes.
Meanwhile, in the present invention, not only can reduce the temperature of glass tube, can also reduce the temperature of electrical heating wire.So, just can produce the refrigerator that end rubber chock plug is damaged.
In addition, because thermal component is made coiled sheet or strip thermal component, be wound into continuous coil having on the plug of same diameter with glass tube, again it is cut into the thermal component (radiating fin) of given size, so, except the productivity ratio height, when glass tube is installed, owing to glass tube is passed in the hole made from plug, thereby not only can install at an easy rate, and cost is also very low.
In addition, because thermal component and the accessory that the ceiling that is arranged on Defrost heater top couples together are made radiating fin, can also be used as radiating fin, thereby can reduce the radiating fin that is installed on the glass tube to ceiling.
In addition, owing to do the profile that is installed in the thermal component on the glass tube greatlyyer than the size (L1) of the ceiling that is arranged on Defrost heater top, so with different in the past, can the gamut of the depth direction size of cooler be heated, thereby can shorten time of defrosting.
In addition, the electrical heating wire that is wound into coiled type is being contained in the glass tube, two ends are arranged on the cooler bottom with the Defrost heater that end rubber chock plug seals, use in the refrigerator of iso-butane as cold-producing medium of hydrocarbon, owing to used thermal component (radiating fin), the surface temperature of the glass tube that constitutes Defrost heater and the temperature of electrical heating wire are reduced to below the design temperature, thereby even if the situation that the HC cold-producing medium leaks because of cooler breakage etc. takes place, the HC cold-producing medium can not become burning things which may cause a fire disaster yet.
Also have, owing to be to make 394 ℃ thermal component (radiating fin) that 494 ℃ of the firing temperatures that Defrost heater is limited in the iso-butane in the hydrocarbon in the temperature of adstante febre deduct 100 ℃ again to be wound on Defrost heater on the glass tube, so, under the refrigerator user mode, thermal component (radiating fin) is with the glass tube and the electrical heating wire that constitute Defrost heater, its temperature can both be controlled at foolproof below 394 ℃, and Defrost heater just can not become the source of igniting of HC cold-producing medium.
Claims (4)
1. a refrigerator has the cooler that is connected in the freeze cycle that has encapsulated combustible refrigerant, and disposed Defrost heater below above-mentioned cooler in the casing of thermal insulation, it is characterized in that,
Above-mentioned Defrost heater has following each several part: have coiler part that is wound into coiled type in glass tube and the electrical heating wire that is positioned at the straight line portion of these coiler part both sides; Two ends with the above-mentioned glass tube of sealing are the seal member of the lead that makes above-mentioned electrical heating wire or be connected with the above-mentioned electrical heating wire inside and outside hole portion by being communicated with above-mentioned glass tube; And be arranged to facing to above-mentioned coiler part, be arranged on diameter lamellar thermal component roughly the same or bigger, that be wound into coiled type on the periphery of glass tube length direction, internal diameter and above-mentioned glass tube, its thermal conductivity ratio is inserted the height that leads to above-mentioned glass tube wherein; Do the pitch of above-mentioned thermal component greatlyyer than the pitch of above-mentioned coiler part.
2. refrigerator as claimed in claim 1 is characterized in that,
Between above-mentioned cooler and above-mentioned glass tube, have the ceiling parts; Above-mentioned thermal component is the laminal radiating fin that is wound on the above-mentioned glass tube; The width of above-mentioned radiating fin is made bigger than the width of above-mentioned ceiling, and is littler than the width of above-mentioned cooler depth direction; The Outboard Sections of above-mentioned radiating fin projected area below above-mentioned ceiling parts is the shape of extending along vertical direction.
3. refrigerator as claimed in claim 1 is characterized in that,
Between above-mentioned cooler and above-mentioned glass tube, have the ceiling parts, and above-mentioned Defrost heater has the radiating fin that accessory that above-mentioned thermal component and above-mentioned ceiling parts are coupled together forms.
4. refrigerator as claimed in claim 2 is characterized in that,
Be decided to be below the 2.0mm by coiling pitch above-mentioned coiler part, do the pitch of above-mentioned thermal component greatlyyer than the pitch of above-mentioned coiler part, and the distance between above-mentioned coiler part and the above-mentioned glass tube fixed on below the 1mm, thereby the heating temp that makes above-mentioned electrical heating wire drops to below 400 ℃, is lower than the firing temperature of combustible refrigerant.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004244554 | 2004-08-25 | ||
| JP2004244554A JP3944498B2 (en) | 2004-08-25 | 2004-08-25 | refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1740710A CN1740710A (en) | 2006-03-01 |
| CN100362297C true CN100362297C (en) | 2008-01-16 |
Family
ID=36093172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100555504A Active CN100362297C (en) | 2004-08-25 | 2005-03-16 | Refrigerator |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3944498B2 (en) |
| KR (1) | KR100659649B1 (en) |
| CN (1) | CN100362297C (en) |
| TW (1) | TWI285724B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839608B (en) * | 2007-11-22 | 2012-07-04 | 松下电器产业株式会社 | Cooler with defrosting heater, and object storage device |
| JP2012255602A (en) * | 2011-06-09 | 2012-12-27 | Sharp Corp | Refrigerator |
| JP2013245885A (en) * | 2012-05-28 | 2013-12-09 | Panasonic Corp | Refrigerator |
| WO2017138109A1 (en) * | 2016-02-10 | 2017-08-17 | 三菱電機株式会社 | Refrigerator |
| KR101919336B1 (en) * | 2018-07-27 | 2018-11-19 | (주)삼공사 | Cooling unit using isobutane as refrigerant |
| GB2578758B (en) * | 2018-11-07 | 2021-03-24 | B Medical Systems Sarl | Cold storage device |
| CN114776747B (en) * | 2022-03-15 | 2023-09-22 | 东北大学 | Composite hyperbolic corrugated sandwich structure for inhibiting vibration of lubricating oil tank of aero-engine and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0722165A (en) * | 1993-06-29 | 1995-01-24 | Sanyo Electric Co Ltd | Glass tube heater |
| JPH07146056A (en) * | 1993-11-25 | 1995-06-06 | Matsushita Refrig Co Ltd | Refrigerator |
| JPH08105680A (en) * | 1995-01-27 | 1996-04-23 | Hitachi Ltd | Refrigerator |
| JP2000283635A (en) * | 1999-03-30 | 2000-10-13 | Hitachi Ltd | Refrigerator |
| WO2002073106A1 (en) * | 2001-03-13 | 2002-09-19 | Matsushita Refrigeration Company | Refrigerator |
| CN1467467A (en) * | 2002-07-11 | 2004-01-14 | 株式会社小林制作所 | Defrosting heater of household refrigerator |
-
2004
- 2004-08-25 JP JP2004244554A patent/JP3944498B2/en active Active
-
2005
- 2005-01-04 TW TW094100153A patent/TWI285724B/en active
- 2005-02-25 KR KR1020050015613A patent/KR100659649B1/en not_active IP Right Cessation
- 2005-03-16 CN CNB2005100555504A patent/CN100362297C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0722165A (en) * | 1993-06-29 | 1995-01-24 | Sanyo Electric Co Ltd | Glass tube heater |
| JPH07146056A (en) * | 1993-11-25 | 1995-06-06 | Matsushita Refrig Co Ltd | Refrigerator |
| JPH08105680A (en) * | 1995-01-27 | 1996-04-23 | Hitachi Ltd | Refrigerator |
| JP2000283635A (en) * | 1999-03-30 | 2000-10-13 | Hitachi Ltd | Refrigerator |
| WO2002073106A1 (en) * | 2001-03-13 | 2002-09-19 | Matsushita Refrigeration Company | Refrigerator |
| CN1467467A (en) * | 2002-07-11 | 2004-01-14 | 株式会社小林制作所 | Defrosting heater of household refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI285724B (en) | 2007-08-21 |
| JP2006064209A (en) | 2006-03-09 |
| TW200607966A (en) | 2006-03-01 |
| KR100659649B1 (en) | 2006-12-21 |
| JP3944498B2 (en) | 2007-07-11 |
| KR20060042186A (en) | 2006-05-12 |
| CN1740710A (en) | 2006-03-01 |
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Address after: Tokyo, Japan, Japan Patentee after: Hitachi Global Living Program Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Hitachi Household Electric Appliance Co. |