WO2006121103A1 - Glacière à dégivrage et réfrigérateur doté d’une glacière à dégivrage - Google Patents

Glacière à dégivrage et réfrigérateur doté d’une glacière à dégivrage Download PDF

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Publication number
WO2006121103A1
WO2006121103A1 PCT/JP2006/309458 JP2006309458W WO2006121103A1 WO 2006121103 A1 WO2006121103 A1 WO 2006121103A1 JP 2006309458 W JP2006309458 W JP 2006309458W WO 2006121103 A1 WO2006121103 A1 WO 2006121103A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass tube
cooler
notch
cooling fin
bent portion
Prior art date
Application number
PCT/JP2006/309458
Other languages
English (en)
Japanese (ja)
Inventor
Kazuhiko Ito
Toshiki Maeda
Masaki Sunada
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2006121103A1 publication Critical patent/WO2006121103A1/fr

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Classifications

    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements

Definitions

  • the present invention relates to a cooler such as a refrigerator having a defrosting device and a refrigerator provided with the cooler.
  • FIG. 10 is a cross-sectional view of an essential part of a conventional refrigerator.
  • the refrigerator has a freezer compartment 1 at the lowermost part, a freezer compartment door 2 at the front of the freezer compartment 1, a refrigerator compartment 3A above the freezer compartment 1, a refrigerator compartment door 4 at the front of the refrigerator compartment 3A, and a refrigerator main body
  • a cooler 5 is provided at the rear of the part, a glass tube heater 6 as a defrosting device disposed in a notch opened downward at the lower part of the cooler 5, and a fan 7 at the upper part of the cooler 5.
  • the operation of the refrigerator configured as described above will be described below.
  • the cooler 5 is cooled by the refrigerant flowing in the cooler 5, and the freezer compartment 1 and the refrigerator compartment 3A are cooled by the operation of the fan 7.
  • the air heat-exchanged by the cooler 5 flows into the high-temperature outside air when the freezer door 2 and the refrigerator door 4 are opened, and evaporation of water contained in stored food in the freezer 1 and the refrigerator 3 Since the air is highly humidified, the moisture in the air forms frost and deposits on the cooler 5 which is low in temperature due to the air.
  • the glass tube heater 6 is energized to radiate and defrost the cooler 5 by radiant heat.
  • FIG. 11 is a perspective view of an essential part of another conventional cooler with a defroster
  • FIG. 12 is a perspective view of the defroster.
  • the cooler 8 A is composed of a plurality of cooling fins 10 and a refrigerant pipe 9 penetrating the cooling fins 10.
  • a glass tube heater 11 as a defrosting device, a glass tube 12 and a plate 13 are provided. Specifically, after attaching the plate 13 having a shape along the outer peripheral upper surface of the glass tube 12 to the glass tube 12, the outer peripheral upper surface of the plate 13 is brought into contact with the lower end portion of the cooling fin 10. Form a cooler.
  • the plate 13 is made of aluminum which is a material having a high thermal conductivity.
  • the above configuration can also be considered as means for suppressing the surface temperature of the glass tube 12 to the ignition temperature or less of the flammable refrigerant.
  • the above configuration can also be considered as means for suppressing the surface temperature of the glass tube 12 to the ignition temperature or less of the flammable refrigerant.
  • a cooler comprising a plurality of cooling fins and a refrigerant pipe penetrating the cooling fins, and a defroster for defrosting the cooler, the defroster comprising a glass tube and a heater installed inside the glass tube
  • a glass tube heater consisting of a wire and a notch whose periphery is formed by a bent portion formed by bending the cooling fin and an open portion formed in a part of the cooling fin, and the glass tube heater is formed in the notch
  • the radiant heat of the glass tube heater effectively supplies heat to the cooler.
  • the heat of the surface of the glass tube given the heater linear force is directly supplied to the bent portion of the cooling fin by thermal conduction. Can effectively supply heat to the cooler.
  • the heat of the surface of the glass tube transfers heat to the cooling fins, which can lower the surface temperature of the glass tube of the glass tube heater.
  • the heat of the surface of the glass tube conducts heat to the cooling fins, so the surface temperature of the glass tube of the glass tube heater can be reduced.
  • the bent portion is provided only at the peripheral edge in the vertical direction of the notch, there are no portions in the direction of the upper surface and the lower surface of the glass tube that impede the effect of the radiant heat.
  • the glass tube can be defrosted utilizing radiant heat to the entire surface of the glass tube in the upper surface direction, and can be effectively defrosted below the cooler in the lower surface direction of the glass tube.
  • the radiant heat of the heater effectively supplies heat to the cooler.
  • the glass tube is in contact with the bent portion provided only at the vertical edge of the notch of the cooling fin, the heat of the surface of the glass tube given from the heater line is directly transmitted by heat conduction. The heat is supplied to the bent portion of the cooling fin to effectively supply the heat to the cooler, and the defrosting efficiency can be improved.
  • the heat of the surface of the glass tube conducts heat to the cooling fins, so the surface temperature of the glass tube of the glass tube heater can be reduced.
  • the bending portion and the glass tube are provided at the horizontal periphery of the notch of the cooling fin by providing the bending portion at the vertical peripheral edge and the horizontal peripheral edge of the notch.
  • the top is in contact with.
  • the heat of the surface of the upper portion of the glass tube is thermally conducted to the cooling fin.
  • Tube heater The surface temperature of the upper part of one glass tube can be further lowered.
  • the heat conduction can be promoted by increasing the contact area between the bent portion and the upper portion of the glass tube by setting the number of horizontal bent portions of the notch to at least two or more. Since the heat can be supplied to the cooler more effectively, the defrosting efficiency can be further improved.
  • the heat of the surface of the upper portion of the glass tube conducts heat to the cooling fins, so that the surface temperature of the upper portion of the glass tube of the glass tube heater can be further lowered.
  • the bending portion in the horizontal direction of the notch has a bending angle of 90 degrees or less, so that when the glass tube heater is inserted into the notch, the glass tube is cut even if bending occurs or the like.
  • a bent portion provided at the horizontal peripheral edge of the notch can maintain contact with the glass tube reliably and uniformly. In this way, the heat can be uniformly conducted to the cooler, and the defrosting efficiency can be improved.
  • productivity can be improved.
  • the bent portion of the cooling fin since the bent portion of the cooling fin is flat, the bent portion of the cooling fin can reliably contact the glass tube, so that the defrosting efficiency can be further improved. it can.
  • the bending portion of the cooling fin is flat, bending force of the cooling fin is easy, and in the assemblability of inserting the glass tube heater into the cooler, the glass tube of the bending portion is installed. Since the surface is flat, the glass tube can be easily inserted, thereby improving productivity.
  • the horizontal opening of the notch is provided approximately at the center in the depth direction of the notch, so that the opening is located on the top surface of the glass tube.
  • the present invention by providing the notch at the lower end portion of the cooling fin, radiant heat from the glass tube heater can be supplied to the entire cooler using natural convection upward, and the lower side of the cooler
  • the distance between the drain pan portion and the glass tube heater is shortened, and the drain pan portion can be defrosted by radiant heat to the lower side of the glass tube heater.
  • another defroster such as a surface heater for defrosting the drain pan portion.
  • the assemblability of installing the glass tube heater in the cooler Since the glass tube heater can be inserted, it is easier than installing the glass tube heater in the center of the cooler.
  • the contact area effective for heat conduction can be increased by providing the bent portion of the cooling fin at two or more places per one cooling fin, so the defrosting efficiency can be further enhanced. It can be improved.
  • the present invention can transfer the heat of the glass tube heater to the entire cooler by efficiently providing the notches in the approximate center of the depth direction of the cooler.
  • heat conduction to the glass tube heater force cooling fin is effectively performed by setting the length of the bent portion of the cooling fin to 5% or more of the length between the adjacent cooling fins. be able to.
  • the glass tube heater fits within the notch because the vertical length of the notch is larger than the outer diameter of the glass tube. In this way, the glass tube heater can be miniaturized as a cooler with a defroster that can not protrude from the cooler.
  • the heat flowing on the surface of the glass tube is conducted to the cooling fins by making the refrigerant flowing in the refrigerant tube a flammable refrigerant, the heat capacity of the glass tube heater is not reduced.
  • the surface temperature of the tube can be kept below the ignition temperature of the flammable refrigerant.
  • FIG. 1 is a perspective view of a cooler with a defroster according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the undersurface force of the cooler with a defroster shown in FIG.
  • FIG. 3 is a cross-sectional view of the cooler with a defroster shown in FIG. 1, taken along line 3-3.
  • FIG. 4 is a cross-sectional view of an essential part of the defrosting apparatus shown in FIG.
  • FIG. 5 is a detailed view of the main parts of the cooling fins in the cooler with a defroster shown in FIG.
  • FIG. 6 is a perspective view of another cooler with a defroster according to Embodiment 1 of the present invention.
  • FIG. 7 is a perspective view of a cooler with a defroster according to a second embodiment of the present invention.
  • FIG. 8 is a cross-sectional view taken along line 8-8 of the cooler equipped with a defroster shown in FIG.
  • FIG. 9 is a detailed view of the main parts of the cooling fins in the cooler with a defroster shown in FIG.
  • FIG. 10 is a sectional view of an essential part of a conventional refrigerator.
  • FIG. 11 is a perspective view of the main part of another conventional cooler with a defroster.
  • FIG. 12 is a perspective view of the defrosting apparatus shown in FIG.
  • the cooler with a defroster (hereinafter referred to as “cooler”) is in contact with the cooling fins 23 and the cooling fins 23 formed of a plurality of cooling fins 23 and a refrigerant pipe 22 penetrating the cooling fins 23.
  • a glass tube heater 24 is configured as a defrosting device.
  • the refrigerant pipe 22 is filled with isobutane which is a flammable refrigerant.
  • the glass tube heater 24 is connected to a heater wire 26 formed of a metal resistor in a coil shape, a glass tube 27 covering the heater wire 26, a cap 28 covering the opening of the glass tube 27, and the heater wire 26.
  • the lead wire 29 is composed of
  • a notch 25 opened downward is provided.
  • the bent portion 30 is provided only at the vertical peripheral edge of the notch 25. Further, in the peripheral portion of the notch 25, an open portion 31 is present at a portion where the bending portion 30 is not formed.
  • the bent portion 30 is not continuously formed on all the peripheral portions of the notch 25.
  • the open part 31 has a meaning of the extent that the bent part 30 is not formed.
  • the end face of the cooling fin 23 may include a so-called collar or the like, which is often caulked at the site where the refrigerant pipe is inserted.
  • the glass tube heater 24 is inserted into the notch 25 and the bent portion 30 and the glass tube 27 are in contact with each other.
  • the main point is that the bending portion 30 extends in a plane shape along the upper and lower direction of the cooler 21. More specifically, when the cooler 21 is arranged as shown in FIG. 1, the glass tube heater 24 is inserted horizontally into the notch 25 at the bottom of the cooling fin 23, and only the vertical edge of the notch 25 is inserted. The bent portion 30 provided in the and the glass tube 27 of the glass tube heater 24 are brought into contact with each other.
  • Glass tube 27 has a cylindrical shape with an outer diameter of 10.5 mm and an inner diameter of 8.5 mm.
  • the length A of the bent portion 30 of the cooling fin 23 is 4.9 mm
  • the height B of the bent portion 30 is 12 mm
  • the glass tube insertion portion size of the notch 25 is C 10.8 mm
  • the bending angle D of 30 is 85 °.
  • the length of the cooling fin 23 and the adjacent cooling fin 23, that is, the so-called fin pitch is 10 mm.
  • the bending portion 30 is provided with two bending portions for one cooling fin, and the bending portion 30 is provided on both sides of the outer periphery of the glass tube 27 in the installation direction of the glass tube 27. And the cooling fins 23 are in contact.
  • the material of the refrigerant pipe 22 and the cooling fin 23 is aluminum having a high thermal conductivity.
  • Such a cooler is formed, for example, by the following method.
  • a substantially T-shaped cut is provided on the cooling fin 23 by press processing. It is preferable to perform this pressing simultaneously with the processing for forming the outer peripheral shape of the cooling fin and the processing for forming a long hole for inserting the refrigerant pipe, since the number of steps can be reduced.
  • the processing method for providing the substantially T-shaped cut may be a method such as laser processing.
  • the bending portion 30 is formed by press working using a mold for defining the bending position and bending angle of the bending portion 30.
  • this bending method may be a processing method using a bending jig!
  • a cooling pipe 2 is formed by bending one refrigerant pipe, and the cooling pipe 2
  • the glass tube heater 24 is inserted into the notch 25 of the cooling fin 23 and the glass tube 27 and the bent portion 30 are brought into close contact with each other to form a cooler.
  • the process of inserting the glass tube heater 24 into the notch 25 of the cooling fin 23 is a refrigerant tube
  • the refrigerant pipe used is a so-called serpentine-like refrigerant pipe in which one refrigerant pipe is bent, but a so-called hairpin pipe constituted by a straight pipe portion and a bent pipe portion, and a bent pipe
  • the refrigerant pipe may be formed by connecting the component to the return bend by brazing or the like. In that case, after the hairpin tube is inserted into the cooling fin, a return bend is attached to the end of the straight tube portion of the hairpin tube, and a refrigerant tube is formed by brazing or the like.
  • the heater wire 26 When the frosted cooler 21 is defrosted, the heater wire 26 is heated by energization from the lead wire 29 and heat is radiated to the glass tube 27. Heat radiates further from the glass tube 27 and defrosts the cooler 21. Further, the heat of the surface of the glass tube 27 given from the heater wire 26 is supplied to the bent portion 30 by heat conduction since the bent portion 30 of the cooling fin 23 and the glass tube 27 are in contact with each other. , Defrost the cooling fins 23.
  • the glass tube heater 24 is inserted horizontally into the notch 25 in the lower part of the cooling fin 23 and is provided only at the vertical peripheral edge of the notch 25 and the glass tube heater 24
  • the glass tube 27 is in contact, and in the direction of the upper surface and the lower surface of the glass tube 27, there is no part that hinders the effect of radiant heat.
  • the radiation heat can be defrosted to the entire cooler 21, and in the lower surface direction of the glass tube 27, the drain pan below the cooler 21 (see FIG. It is effective for defrosting the part (not shown) and can improve the defrosting efficiency.
  • the glass tube 27 has an outer diameter of 10.5 mm and the notch 25 of the glass tube insertion portion size C is 10.8 mm. Set the dimension C of the glass tube insertion part 25 of the notch 25 wider than the outer diameter of the glass tube 27 The glass tube 27 can be easily inserted into the notch 25.
  • the length A of the bent portion 30 of the cooling fin 23 is 4.9 mm. Since the bent portion 30 is flat, the contact surface of the glass tube 27 is circular. On the other hand, after the glass tube 27 is inserted into the notch 25 by the setting of the glass tube insertion portion size C and the bending angle D, the bent portion 30 and the glass tube 27 can be reliably in contact with each other. Since 30 is flat, processing of the bent portion 30 is easy.
  • the height B of the bent portion 30 is 12 mm, and by setting the outside diameter of the glass tube 27 to be larger than 10.5 mm, the glass tube 27 can be installed without protruding below the cooler 21. The effect of being able to be miniaturized as a cooler with a defroster is obtained.
  • the bending angle D is bent at 85 °. Since the dimension C of the glass tube insertion part is set larger than the outer diameter of the glass tube 27, the glass tube 27 is installed by inclining the bent portion 30 in the installation direction of the glass tube 27. 27 and the bent portion 30 of the cooling fin 23 can be reliably in contact. However, the size C of the glass tube insertion portion may be set smaller than the outer diameter of the glass tube 27, the bending angle D of the bent portion 30 may be 90 °, and the glass tube 27 may be pressed.
  • two bent portions 30 are provided for one cooling fin 23, and both sides of the outer periphery of the glass tube 27 are brought into contact with the cooling fins 23 in the installation direction of the glass tube 27.
  • the contact area effective for heat conduction can be increased, and defrosting can be performed more efficiently.
  • the notch 25 is provided approximately at the center of the depth direction of the cooler 21, and the glass tube heater 24 is inserted in the notch 25, so that the heat of the glass tube heater 24 can be efficiently cooled in the entire cooler 21. Tell. In this manner, the possibility of the occurrence of a portion which is difficult to defrost in a part of the cooler 21 is reduced.
  • the effect of heat conduction from the glass tube 27 to the cooling fins 23 is improved by setting the length of the bent portion 30 of the cooling fins 23 to 5% or more of the length between the adjacent cooling fins 23.
  • the defrosting efficiency of the chiller 2 1 is improved.
  • the defrosting efficiency can be further improved by setting the length of the bent portion 30 of the cooling fin 23 to 20% or more of the length between the adjacent cooling fins 23.
  • the maximum possible ratio of the length A of the bent portion 30 to the length between adjacent cooling fins 23 is (1Z2 of the glass tube insertion portion size C) ((length between adjacent cooling fins 23) ) In the case of the relationship which becomes, it is 100%.
  • (1Z2 of the glass tube insertion portion size C) ⁇ (length between adjacent cooling fins 23)
  • the maximum value is less than 100%.
  • the ignition temperature of isobutane which is a flammable refrigerant, is 494 ° C.
  • the surface temperature of glass tube 27 is set to 394 ° C. or less, which is 100 ° C. lower than the ignition temperature, to ensure safety.
  • the length of the bent portion 30 is 49% of the length between the adjacent cooling fins 23
  • the surface temperature of the glass tube 27 is 330 ° C., and when the flammable refrigerant is used as the refrigerant of the refrigeration cycle, there is a sufficient reduction effect of the surface temperature of the glass tube. Therefore, it is possible to provide a refrigerator that prevents the ignition of the flammable refrigerant even when the flammable refrigerant is defrosted in an environment where the flammable refrigerant leaks to the installation atmosphere of the defrosting means.
  • the defrosting efficiency is improved and the defrosting time can be shortened, so that the power consumption of the refrigerator can be reduced.
  • the bending portion 30 may be provided with the cooling fin 23 not provided with the bending portion 30 according to the force required for all the cooling fins 23.
  • the cooling fins 23 provided with the bent portions 30 and the cooling fins 23 not provided with the bent portions 30 may be alternately arranged, or the cooling fins 23 provided with the bent portions 30 may be alternately provided. It may be arranged.
  • the glass tube heater 24 is inserted in the lower part of the cooler 21.
  • the glass tube heater is further disposed at a position between the coolers in the height direction. 24 can be inserted, and two glass tube heaters can be inserted into one cooler. Furthermore, three or more glass tube heaters may be inserted.
  • the bending portion 30 may be provided at two places with respect to the cooling fin 23, depending on necessity, the bending part 30 may be provided at one place.
  • the refrigerant pipe 22 and the cooling fins 23 may have high thermal conductivity, and the material of the force refrigerant pipe 22 and the cooling fins 23 may be copper.
  • the cooler includes a cooler 21 including a plurality of cooling fins 23 and a refrigerant pipe 22 penetrating the cooling fins 23, and a cooling fin 2. 3 and a glass tube heater 24 as a defrosting device in contact.
  • the refrigerant pipe 22 is filled with isobutane which is a flammable refrigerant.
  • the glass tube heater 24 is connected to a heater wire 26 formed by coiling a metal resistor, a glass tube 27 covering the heater wire 26, a cap 28 covering the opening of the glass tube 27, and the heater wire 26.
  • the lead wire 29 is composed of
  • a notch 25 opening downward is provided, and a bent portion 30 is formed on the vertical edge and the horizontal edge of the notch 25. Is provided.
  • an open portion 31 which is open is present at a portion where the bending portion 30 is not formed.
  • the bending part 30 is not continuously formed in all the peripheral parts of the notch 25.
  • the open part 31 means a part where the bent part 30 is not formed.
  • the end face of the cooling fin 23 is a so-called force which is often caulked at the part where the refrigerant pipe is inserted. It also includes lathe parts.
  • the glass tube heater 24 is inserted into the notch 25 and the bent portion 30 and the glass tube 27 are in contact with each other.
  • the vertical direction means that the bent portion 30 extends in a plane along the vertical direction of the cooler 21.
  • the horizontal direction means that the bent portion 30 is present along the left-right direction of the cooler 21 or in the vicinity of the top of the notch 25 in a substantially U-shaped form.
  • the glass tube heater 24 is horizontally inserted into the notch 25 at the bottom of the cooling fin 23 and provided in the vertical direction of the notch 25.
  • Two bent portions 30 and two bent portions provided in the horizontal direction ie, two bent portions 30 provided in the shape of a letter of “ ⁇ ” from the vicinity of the top of the notch 25) Contact the glass tube 27 of the heater 24.
  • the length A of the bending portion 30 in the vertical direction of the cooling fin 23 and the length F of the bending portion 30 in the horizontal direction are 4.9 mm
  • the height B of the bending portion 30 is 12 mm
  • the notch The 25 glass tube insertion part size C is 10. 8 mm
  • the bending angle D of the bending part 30 is 85 °.
  • the so-called fin pitch between the cooling fins 23 and the adjacent cooling fins 23 is 10 mm.
  • the bending portion 30 is provided with four bending portions for one cooling fin, and in the installation direction of the glass tube 27, the bending portions are provided on both sides and the upper portion of the outer periphery of the glass tube 27. 30 and the cooling fins 23 are in contact with each other.
  • the bending angle E of the horizontal bent portion 30 of the cooling fin 23 is 90 ° or less.
  • the refrigerant pipe 22 and the cooling fins 23 are formed of aluminum, which is a material having a high thermal conductivity.
  • Such a cooler is formed, for example, by the following method.
  • This press caulk is desirable because it can reduce the number of processes if it is performed simultaneously with the process of forming the outer peripheral shape of the cooling fin and the process of forming a long hole for inserting the refrigerant pipe.
  • a method such as laser processing may be used as a processing method for providing the substantially cross-shaped cut.
  • the bending portion 30 is formed by pressing using a bending position of the bending portion 30 and a die for defining a bending angle.
  • this bending method may use a processing method using a bending jig!
  • the refrigerant pipe 22 formed by bending one refrigerant pipe is used as a cooling fin 2
  • the glass tube heater 24 is inserted into the notch 25 of the cooling fin 23 and the glass tube 27 is brought into close contact with the bent portion 30 to form a cooler.
  • the step of inserting the glass tube heater 24 into the notch 25 of the cooling fin 23 may be performed before the step of inserting the cooling medium tube 22 into the long hole for the refrigerant tube insertion of the cooling fin 23. I do not care.
  • the refrigerant pipe used is a so-called serpentine-like refrigerant pipe in which one refrigerant pipe is bent, but a so-called hairpin pipe composed of a straight pipe part and a bent pipe part
  • the refrigerant pipe may be formed by connecting the component to the return bend by brazing or the like. In that case, after the hairpin tube is inserted into the cooling fin, a return bend is attached to the end of the straight tube portion of the hairpin tube, and a refrigerant tube is formed by brazing or the like.
  • the cooler 21 When the frosted cooler 21 is defrosted, the heater wire 26 is heated by energization from the lead wire 29, and heat is radiated to the glass tube 27. Heat radiates further from the glass tube 27 and defrosts the cooler 21. Further, the heat of the surface of the glass tube 27 given from the heater wire 26 is supplied to the bent portion 30 by heat conduction since the bent portion 30 of the cooling fin 23 and the glass tube 27 are in contact with each other. , Defrost the cooling fins 23.
  • the bent portions 30 are provided on the vertical peripheral edge and the horizontal peripheral edge of the notches 25, the bent portions 30 provided on the horizontal edge of the notches 25 of the cooling fin 23 and the like
  • the upper part of the glass tube 27 is in contact.
  • the heat of the surface of the glass tube 27 given from the heater wire 26 can supply more heat to the cooler 21 by heat conduction, and the radiation from the glass tube heater 24 can be cooled from the open part 31. Defrosting efficiency can be improved more effectively because it can be supplied to
  • the bent portion 30 provided on the horizontal periphery of the notch 25 is in contact with the upper portion of the glass tube 27, the heat of the surface of the upper portion of the glass tube 27 is transferred to the cooling fin 23.
  • the surface temperature of the upper portion of the glass tube 27 of the glass tube heater 24 can be further lowered because the heat is conducted.
  • the horizontal opening 31 is provided approximately at the center of the notch in the depth direction, that is, disposed on the uppermost surface of the glass tube 27 to maximize the radiation heat effect. It can be done.
  • the length A of the vertical bending portion 30 of the cooling fin 23 and the length F of the horizontal bending portion 30 are 4.9 mm. Since the bending portion 30 is flat, the contact surface with the glass tube 27 is circular, but the glass tube 27 is inserted into the notch 25 by setting the dimension C of the glass tube and the bending angles D and E. After that, since the bent portion 30 and the glass tube 27 can be reliably brought into contact with each other, and since the bent portion 30 is flat, processing of the bent portion 30 is easy.
  • the height B of the bent portion 30 in the vertical direction is 12 mm, and by setting the outer diameter of the glass tube 27 to be larger than 10.5 mm, the glass tube 27 does not protrude to the lower part of the cooler 21. Can be installed Therefore, the effect of being able to be miniaturized as a cooler with a defrosting device is obtained.
  • the bending angle D of the bending portion 30 in the vertical direction is bent at 85 °. Since the dimension C of the glass tube insertion portion is set larger than the outer diameter of the glass tube 27, the glass tube 27 is installed by inclining the bent portion 30 in the installation direction of the glass tube 27. 27 and the bent portion 30 of the cooling fin 23 can be reliably in contact with each other. However, the dimension C of the glass tube insertion portion may be set smaller than the outer diameter of the glass tube 27, the bending angle D of the bent portion 30 may be 90 °, and the glass tube 27 may be pressed.
  • the bending angle E of the bent portion 30 in the horizontal direction is bent to 90 ° or less.
  • the bending angle E is preferably in the range of 85 ° to 70 ° in consideration of the processability of the cooling fin 23 and the insertability of the glass tube 27.
  • bent portions 30 are provided for one cooling fin 23, and cooling is performed at two places on the outer periphery of the glass tube 27 and at two places on the upper surface in the installation direction of the glass tube 27.
  • the contact with the fins 23 can increase the effective contact area for heat conduction, and defrost more efficiently.
  • the notch 25 is provided approximately at the center of the depth direction of the cooler 21 and the glass tube heater 24 is inserted in the notch 25, so that the heat of the glass tube heater 24 can be efficiently cooled in the entire cooler 21. As it is transmitted, the possibility of occurrence of a location where it is difficult to defrost in part of the cooler 21 is reduced.
  • the effect of heat conduction from the glass tube 27 to the cooling fins 23 is improved by setting the length of the bent portion 30 of the cooling fins 23 to be 5% or more of the length between the adjacent cooling fins 23.
  • the defrosting efficiency of the chiller 2 1 is improved.
  • the defrosting efficiency can be further improved by setting the length of the bent portion 30 of the cooling fin 23 to 20% or more of the length between the adjacent cooling fins 23.
  • the maximum possible ratio of the length A of the vertical bending portion 30 and the length F of the horizontal bending portion 30 to the length between the adjacent cooling fins 23 is (glass tube insertion portion Dimension It is 100% when the relation is such that 1Z2) of method C ⁇ (the length between adjacent cooling fins 23).
  • (1Z2 of the glass tube insertion portion size C) length between adjacent cooling fins 23
  • the ignition temperature of isobutane which is a flammable refrigerant, is 494 ° C
  • the surface temperature of the glass tube 27 is set to 394 ° C or less, which is 100 ° C lower than the ignition temperature, to ensure safety.
  • the length of the bent portion 30 is 49% of the length between the adjacent cooling fins 23.
  • the surface temperature of the glass tube 27 is 330 ° C., and when the flammable refrigerant is used as the refrigerant of the refrigeration cycle, there is a sufficient reduction effect of the surface temperature of the glass tube. Therefore, even when defrosting is performed in an environment where the flammable refrigerant leaks to the installation atmosphere of the defrosting means, it is possible to provide a refrigerator that prevents the ignition of the flammable refrigerant.
  • the power consumption of the refrigerator can be reduced because the defrosting efficiency is improved and the defrosting time can be shortened.
  • the bending portions 30 in the horizontal direction are provided at the cooling fin 23 in two places, but the bending portions 30 in the horizontal direction may be provided in three or more places if necessary.
  • the bending portion 30 may be provided with the cooling fin 23 not provided with the bending portion 30 according to the force required for all the cooling fins 23.
  • the cooling fins 23 provided with the bent portions 30 and the cooling fins 23 not provided with the bent portions 30 may be alternately arranged, or the cooling fins 23 provided with the bent portions 30 may be alternately provided. It may be arranged.
  • the refrigerant pipe 22 and the cooling fins 23 may have high thermal conductivity, and the material of the force refrigerant pipe 22 and the cooling fins 23 may be copper.
  • the bent portion 30 provided on the peripheral edge in the horizontal direction of the notch 25 includes two bent portions 30 in which the force in the vicinity of the top of the notch 25 is also formed substantially in a U shape. Instead of being generally in the form of a straight line, it may be a straight bend along the left-right direction.
  • the cooler of the present invention can improve the defrosting efficiency by the radiant heat from the glass tube heater and the heat conduction to the glass tube heater power cooling fin.
  • the heat of the surface of the glass tube is in contact with the glass tube. Since the heat is conducted to the cooling fins that are touched, the surface temperature of the heat pipe can be suppressed to the ignition temperature or less of the flammable refrigerant without reducing the heat capacity of the heater wire.
  • the defroster-equipped cooler of the present invention can efficiently cool and supply the heat of the glass tube heater, and therefore can be applied to applications such as a refrigerator and a vending machine.

Landscapes

  • 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)

Abstract

L’invention vise une glacière à dégivrage présentant une efficacité de dégivrage accrue et un réfrigérateur doté de ladite glacière à dégivrage. Des découpes sont réalisées dans les ailettes de refroidissement, des parties pliées sont réalisées uniquement au niveau des bords périphériques verticaux des découpes, et un réchauffeur à tube en verre est introduit dans les découpes. Les parties pliées sont mises en contact avec le tube en verre du réchauffeur à tube en verre pour dégivrer la glacière en faisant rayonner la chaleur du réchauffeur à tube en verre à partir de la surface supérieure du tube en verre vers les ailettes de refroidissement et en conduisant la chaleur des surfaces latérales du tube en verre vers les ailettes de refroidissement.
PCT/JP2006/309458 2005-05-12 2006-05-11 Glacière à dégivrage et réfrigérateur doté d’une glacière à dégivrage WO2006121103A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2005139546 2005-05-12
JP2005-139546 2005-05-12
JP2006-078445 2006-03-22
JP2006078445A JP2006343089A (ja) 2005-05-12 2006-03-22 除霜装置付き冷却器と除霜装置付き冷却器を備えた冷蔵庫

Publications (1)

Publication Number Publication Date
WO2006121103A1 true WO2006121103A1 (fr) 2006-11-16

Family

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PCT/JP2006/309458 WO2006121103A1 (fr) 2005-05-12 2006-05-11 Glacière à dégivrage et réfrigérateur doté d’une glacière à dégivrage

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Country Link
JP (1) JP2006343089A (fr)
WO (1) WO2006121103A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113739503A (zh) * 2021-11-08 2021-12-03 烟台永诚制冷科技有限公司 一种具有智能调节功能的铝排管道除霜器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4998163B2 (ja) * 2007-09-13 2012-08-15 パナソニック株式会社 熱交換器
CN102506558A (zh) * 2011-11-04 2012-06-20 海信容声(广东)冰箱有限公司 一种风冷冰箱化霜控制系统及控制方法
CN102494462B (zh) * 2011-12-06 2014-05-21 合肥美的电冰箱有限公司 一种冰箱

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59145689U (ja) * 1983-05-18 1984-09-28 株式会社日立製作所 霜取りヒ−タ管を具備した蒸発器
JP2002267331A (ja) * 2001-03-13 2002-09-18 Matsushita Refrig Co Ltd 冷蔵庫

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59145689U (ja) * 1983-05-18 1984-09-28 株式会社日立製作所 霜取りヒ−タ管を具備した蒸発器
JP2002267331A (ja) * 2001-03-13 2002-09-18 Matsushita Refrig Co Ltd 冷蔵庫

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113739503A (zh) * 2021-11-08 2021-12-03 烟台永诚制冷科技有限公司 一种具有智能调节功能的铝排管道除霜器
CN113739503B (zh) * 2021-11-08 2022-02-08 烟台永诚制冷科技有限公司 一种具有智能调节功能的铝排管道除霜器

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