WO2018133736A1 - Évaporateur ou condenseur à plaque brasée pour dispositif de réfrigération et son procédé de fabrication - Google Patents

Évaporateur ou condenseur à plaque brasée pour dispositif de réfrigération et son procédé de fabrication Download PDF

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Publication number
WO2018133736A1
WO2018133736A1 PCT/CN2018/072473 CN2018072473W WO2018133736A1 WO 2018133736 A1 WO2018133736 A1 WO 2018133736A1 CN 2018072473 W CN2018072473 W CN 2018072473W WO 2018133736 A1 WO2018133736 A1 WO 2018133736A1
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Prior art keywords
plate
refrigerant
passage
channel
condenser
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PCT/CN2018/072473
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English (en)
Chinese (zh)
Inventor
马保伟
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上海冰鑫科技有限公司
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Publication of WO2018133736A1 publication Critical patent/WO2018133736A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/022—Evaporators with plate-like or laminated elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/022—Evaporators constructed from a pair of plates forming a space in which is located a refrigerant carrying coil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/043—Condensers made by assembling plate-like or laminated elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Definitions

  • the invention relates to a brazed plate evaporator or a condenser and a manufacturing method thereof, in particular to a brazed plate evaporator or condenser for use in a refrigeration device and a manufacturing method thereof.
  • evaporators or condensers used in refrigeration equipment such as refrigerators and freezers on the market: tube-plate type, inflation type, fin-tube type and wire tube type.
  • Tube-and-plate evaporator The evaporator is formed by winding a copper tube, an aluminum tube or an iron tube into an S-shaped refrigerant passage, and then bonding it with an orange peel aluminum plate by means of a tape or the like.
  • the structure of the evaporator is single and thick (8-10 mm).
  • the contact between the tube and the plate is point type and line contact, and the effective heat exchange area is small, the heat exchange efficiency is low, the deformation is easy, and the iron pipe is easy to corrode.
  • the evaporator or condenser is a steel tube disk formed into an S-shaped refrigerant passage, and then welded together by a parallel, densely arranged steel wire and a refrigerant pipe spot welding method.
  • the evaporator or the condenser has a single structure, a thick thickness (9-11 mm), and has an effective heat exchange area, low thermal conductivity, low heat exchange efficiency, corrosion resistance, and short life.
  • Inflatable evaporator uses two aluminum plates to print a refrigerant passage on the inner surface with a pressure-resistant powder or paint, and presses the surface of the non-passage portions of the two aluminum plates by superposition rolling. Together, the partially printed refrigerant passage is inflated by inflation to form a passage for the refrigerant. Because the method is high pressure pressing, and the channel has large aperture, large spacing and low density, the drum is also driven on both sides, and the drum surface and the plastic shell of the refrigerator are in point and line contact, and the heat conduction and cooling effects are poor. And the space ratio is large, and the cooling area is small. In addition, such structural changes are small, the appearance is poor, the production efficiency is low, and the manufacturing cost is high, and most of them are hidden inside or hidden places of the lining plate of the refrigeration equipment.
  • the evaporator is made by inserting aluminum foil fins on a plurality of rows of copper tubes or aluminum tubes. The tubes are connected in series to form a refrigerant passage, and the fan is blown through the fins to realize the cooling function.
  • the evaporator is mainly used for intercooled refrigerators and freezers. During cooling, the frosting and frosting phenomenon between the fins is serious, and the defrosting is difficult and the effect is poor, which further reduces the heat exchange efficiency, seriously affects the cooling effect, and causes great energy consumption during use.
  • the invention solves the problems that the existing evaporator and the condenser have thick thickness, large space ratio, small heat exchange area, low refrigeration efficiency, complicated structure, poor appearance, inconvenient production and assembly, low structural strength, easy deformation, etc.
  • the problem in turn, provides a brazed plate evaporator or condenser for use in a refrigeration unit and a method of making same.
  • a brazed plate evaporator or condenser for use in a refrigeration apparatus comprising a front plate and a rear plate, the front plate and the rear plate buckle being joined by a brazed joint, and a refrigerant is formed on the fastening surface
  • the refrigerant flowing out of the main passage and the plurality of branch passages are formed by a convex flow passage on the front plate and a convex flow passage on the rear plate.
  • the refrigerant enters the main passage into two or more parallel arranged passages, and the two or more refrigerants enter the main passage and communicate through the plurality of split sub-channels; the refrigerant flows out of the main passage
  • the two or more refrigerants flowing out of the main channel communicate through a plurality of split sub-channels, changing the cross-sectional area of the split sub-channel to control the refrigerant in the split sub-channel flow.
  • the plurality of branch channels are parallel flow channels, diamond cross flow channels or honeycomb cross flow channels.
  • an outwardly protruding introduction channel and an outwardly protruding extraction channel are further disposed on the fastening surfaces of the front plate and the rear plate, and the introduction channel communicates with the refrigerant into the main channel, and the extraction channel and the refrigerant flow out main
  • the channels are connected, and the introduction channel and the extraction channel are both tubular.
  • the evaporator or the condenser further comprises an inlet passage baffle and an outflow passage baffle, the inlet passage obstruction plate is disposed in the refrigerant entering the main passage, and the outflow passage obstruction plate is disposed on the refrigerant outflow main passage
  • the inlet baffle plate and the outflow channel baffle plate divide the plurality of branch channels into an array branch channel, and the plurality of branch channels entering the channel baffle plate and the lead-in channel are the first group branch channel, and enter the channel choke
  • the plurality of branch channels between the plate and the outflow channel baffle are the second group of branch channels, and the plurality of branch channels between the outflow channel baffle plate and the lead-out channel are the third group of branch channels, and the refrigerant enters through the introduction channel After the first group branch channel enters the refrigerant outflow main channel, the second group branch channel enters the refrigerant into the main channel, and then the third group branch channel enters the refrigerant outflow main channel, and finally flows out through the
  • the main refrigerant enters the main passage and the refrigerant outflow main passage is a plate-fin structure
  • the brazed plate evaporator or the condenser further comprises two waveform split fins, and the two waveform split fins respectively
  • the refrigerant is disposed in the main passage and the refrigerant outflow main passage, and the waveform split fin is connected to the front plate and the rear plate in a brazing manner, and the waveform split fin is a corrugated fin, and each wave wall of the waveform split fin
  • the upper edge is provided with a plurality of split holes, and the diameters of the plurality of split holes are gradually increased from the refrigerant inlet end or the outflow end to the distal end thereof, and the plurality of split holes are adjacent to the refrigerant inlet end or the outflow end to the distal end thereof The spacing of the two split holes is gradually reduced.
  • the refrigeration device is a refrigerator or a freezer.
  • a method for manufacturing a brazed plate evaporator or a condenser on a refrigeration device the manufacturing process: step one, stamping the front plate and the rear plate;
  • Step 2 cleaning the front and back plates
  • Step 3 fastening the front plate and the rear plate
  • Step 4 placing the front plate and the rear plate in a brazing furnace, heating to a brazing temperature, holding for a certain period of time, and then cooling the furnace, the front plate and the rear plate are automatically welded together to check whether the front plate and the rear plate are leaking;
  • Step 5 Process the surface of the brazed evaporator or condenser.
  • the brazing temperature in the step 4 is: when the material of the current plate and the rear plate is aluminum, the heating temperature is 580° C. to 630° C., when the material of the current plate and the rear plate is steel, the heating temperature is 800 ° C ⁇ 1250 ° C, when the material of the current plate and the back plate is copper, the heating temperature is 180 ° C ⁇ 950 ° C, the holding time in the step 4 is 10 minutes ⁇ 40 minutes, the processing method in the step 5 Grinding, painting, coloring, anodizing, electrophoretic painting, electrostatic spraying, hydrophilic or hydrophobic.
  • the invention has the following beneficial effects:
  • the refrigerant passage designed by the invention is a dense single-sided drum passage, the thickness of the flat and thin pipelines is small, the refrigeration area is large, and the distribution area of the refrigerant is compared with the existing evaporator and condenser. More than doubled, therefore, the evaporator and condenser of this structure have higher heat exchange efficiency.
  • the flat surface of the evaporator is in surface contact with the refrigerator casing, and can also be directly used as a freezer compartment and a refrigerating compartment box, and the refrigeration efficiency is higher.
  • the refrigerant passage of the present invention has parallel flow passages, cross passages, honeycomb passages, parallel groups, and S-shaped runners.
  • a variety of channel forms can beautify the product, improve the drainage effect of the defrosting water, and reduce the ice sticking problem.
  • the refrigerant passage of the evaporator and the condenser of the present invention is a flat tube passage structure, and the bending radius thereof is small, and it is convenient to make an ice making box, a small cold box and a small refrigerator which are beautifully and efficiently cooled.
  • the high-efficiency refrigeration capacity of the invention can reduce the working time of the compressor or reduce the power of the compressor, so that the energy consumption of the compressor is reduced, the noise is reduced, and the life is prolonged.
  • the refrigerant of the present invention enters the main passage, the refrigerant outflow main passage, the front plate introduction passage, the front plate take-out passage and the branch passage are both formed by press molding, and therefore, the product of the invention has a flat structure, beautiful appearance, high strength, and evaporation.
  • the product has less frosting, quick and defrosting, and is not easily deformed.
  • the overall thickness of the evaporator and the condenser of the present invention is thin, and can be reduced to less than 2.5 mm, which can reduce the thickness of the evaporator of the refrigerator and reduce the thickness of the thermal insulation foam board by 4 to 5 mm, and the effective volume of the refrigeration equipment. The rate is greatly improved. For the same volume of refrigeration equipment, the amount of foam board and outer metal sheet can be reduced, and the economic and social benefits are great.
  • the refrigeration intensity design and workpiece fabrication in the refrigeration zone are convenient, and the effect is good, the degree of automation is high, and it is convenient for mass production.
  • the internal and external lining plates of the current refrigerators, freezers and showcases can be cooled or dissipated by the evaporator and condenser of the present invention, which not only enlarges the heat exchange area, but also improves the cooling, heat dissipation and efficiency, thereby reducing energy consumption.
  • the present invention is a combination of the front plate 1 and the rear plate 2, and there is no assembly problem, thereby making the structure simple.
  • the invention has good appearance and good concealment, and changes the design concept of the existing refrigeration equipment, and has advantages in producing direct-cooling evaporators and condensers.
  • the fast and super-cooling capacity has better effects on energy saving, preservation and pollution reduction.
  • Figure 1 is a perspective view showing the overall structure of a brazing plate type evaporator or condenser for use in a refrigeration apparatus of the present invention (the branch passages 1-5 are DC channels);
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1 (marked 6 in the figure is a lead-out tube);
  • Figure 3 is a cross-sectional view taken along line B-B of Figure 1 (marked 7 in the figure is an introduction tube);
  • Figure 4 is a cross-sectional view taken along line C-C of Figure 1;
  • Figure 5 is a cross-sectional view taken along line D-D of Figure 1;
  • Figure 6 is a cross-sectional view taken along line E-E of Figure 1;
  • Figure 7 is a perspective view showing the overall structure of a brazing plate type evaporator or condenser for use in a refrigeration apparatus of the present invention (the branch passages 1-5 are oblique flow passages);
  • Figure 8 is a perspective view showing the overall structure of a brazing plate type evaporator or condenser for use in a refrigerating apparatus of the present invention (the branch passages 1-5 are honeycomb flow passages);
  • Figure 9 is a perspective view showing the overall structure of a brazing plate type evaporator or condenser for use in a refrigerating apparatus of the present invention (the branch passages 1-5 are parallel sets of S-shaped flow passages);
  • Figure 10 is a cross-sectional view taken along line F-F of Figure 9;
  • Figure 11 is a cross-sectional view taken along line G-G of Figure 9;
  • Figure 12 is a perspective view showing the overall structure of a brazing plate type evaporator or condenser for use in a refrigerating apparatus of the present invention (the branch passages 1-5 are honeycomb S-shaped flow passages);
  • Figure 13 is a perspective view showing the overall structure of a brazing plate type evaporator or condenser for use in a refrigerating apparatus of the present invention (a refrigerant is introduced into the main passage 1-1 and the refrigerant outflow main passage 1-2 is provided with a waveform split fin 5) ;
  • Figure 14 is a cross-sectional view taken along line H-H of Figure 13;
  • Figure 15 is a cross-sectional view taken along line I-I of Figure 13;
  • Figure 16 is a perspective view showing the structure of the waveform split fin 5;
  • Figure 17 is a cross-sectional view taken along line J-J of Figure 16;
  • Figure 18 is a cross-sectional view taken along line K-K of Figure 16;
  • the present embodiment includes a front plate 1 and a rear plate 2, and the front plate 1 and the rear plate 2 are fastened and brazed, and a refrigerant is formed on the fastening surface.
  • the main channel 1-1, the refrigerant outflow main channel 1-2 and the plurality of branch channels 1-5, one end of each branch channel 1-5 is connected with the refrigerant entering the main channel 1-1, and each branch channel 1 The other end of 5 communicates with the refrigerant outflow main passage 1-2.
  • the refrigerant coverage area can be maximized, the usage amount is the smallest, and the cooling and heat dissipation efficiency are the highest.
  • the two plate faces can be formed. Contact, and a solid connection of metal keys, can achieve industrialization, automation, high efficiency and large production, and has a much higher comprehensive advantage than other forms of evaporators and condensers such as inflation type and wire tube type.
  • the refrigerant entering the main passage 1-1, the refrigerant outflow main passage 1-2, and the plurality of branch passages 1-5 are all in the front panel. 1 or a raised flow path on any of the plates in the rear plate 2.
  • the design is such that the evaporator or the condenser forms a single-sided bulging flow path, and the other plate corresponding to the single-sided bulging flow path is flat, so that when the evaporator or the condenser is mounted on the refrigerator or the freezer, the plane is
  • the plastic housing of the refrigerator is in surface contact, and the prior art is a double-sided drum, and both sides are line contact. Therefore, the single-sided drum has a larger effective use space than the double-sided drum, and the cooling area is increased and shortened.
  • the working time of the compressor, the cooling heat dissipation (heat exchange) speed is fast and the efficiency is high.
  • the evaporator of the single-sided drum flow channel facilitates the surface contact between the flat surface and the plastic housing of the refrigeration equipment, so that the refrigeration speed is faster and the efficiency is higher.
  • the working time is also shortened a lot, the energy consumption is much reduced, and the thickness of the insulation layer can be reduced, the volume of the box can be reduced or the effective space utilization of the box can be increased, and the heat insulating material and the metal material can be saved. If it is an inflated, coiled double-sided drum, the drum surface is in line contact with the plastic casing, and its cooling speed and efficiency are much lower, and the thickness of the insulation layer is increased, the volume of the casing is increased, and waste is wasted.
  • the single-sided drum condenser of this patent can replace the internal adhesive or external condenser used in the market, and can also use the condenser plate as the casing. Board, save a piece of shell metal sheet material.
  • Other compositions and connection relationships are the same as in the first embodiment.
  • Embodiment 3 The refrigerant of the present embodiment enters the main passage 1-1, the refrigerant outflow main passage 1-2, and the plurality of branch passages 1-5 are the convex flow passages on the front plate 1 and the rear plate 2
  • the raised flow paths are formed together.
  • This is designed to make the evaporator or condenser form a double-sided drum flow path.
  • double-sided drum can be used, which can increase the heat dissipation area and enhance the airflow disturbance on one side, which can improve some heat dissipation efficiency.
  • the double-sided drum design can increase the airflow disturbance on one side, thus improving some cooling efficiency.
  • Other compositions and connection relationships are the same as in the first embodiment.
  • the present embodiment is described with reference to FIG. 1.
  • the refrigerant entering the main passage 1-1 of the present embodiment is two or more channels arranged in parallel, and the two or more refrigerants enter the main passage 1- 1 is connected through a plurality of split sub-channels 1-6;
  • the refrigerant outflow main channel 1-2 is two or more parallel arranged channels, and the two or more refrigerants flow out of the main channel 1-2
  • the plurality of split sub-channels 1-6 are connected to each other to change the cross-sectional area of the split sub-channels 1-6 to control the flow rate of the refrigerant in the split sub-channels 1-6, thereby making the distribution of the refrigerant on the board more balanced. .
  • the refrigerant outflow main passage 1-2 is set to a plurality of passages.
  • the increased mainstream is to increase the cross-sectional flow of the refrigerant.
  • the present embodiment is described with reference to FIG. 1.
  • the plurality of branch channels 1-5 of the present embodiment are parallel flow channels, diamond cross flow channels or honeycomb cross flow channels.
  • the parallel flow channel facilitates the flow of the defrosting water into the refrigerator collecting trough along the flow path during melting and melting.
  • the diamond-shaped cross flow channel and the honeycomb cross flow channel encrypt the mesh, so that the proportion of the refrigerant is large and the heat exchange efficiency is high.
  • the total flow rate of the refrigerant during the whole cycle should be similar, that is, the cross-sectional area of the refrigerant flowing through the conduit, the main passage and the branch passage is: the refrigerant enters the main passage
  • the cross-sectional area is close to the cross-sectional area of the refrigerant flowing into the conduit, and the sum of the cross-sectional areas of the refrigerant passing through the branch passage is greater than the sum of the areas flowing into or out of the main passage.
  • Other compositions and connection relationships are the same as in any of the embodiments 1 to 4.
  • an outwardly protruding introduction channel 1-3 and an outwardly protruding lead-out are provided on the fastening surfaces of the front panel 1 and the rear panel 2.
  • Channels 1-4, the introduction channels 1-3 are in communication with the refrigerant entering the main channel 1-1, the outlet channels 1-4 are in communication with the refrigerant outflow main channel 1-2, and the introduction channels 1-3 and the extraction channels 1-4 are Tubular.
  • Other compositions and connection relationships are the same as in any of the embodiments 1 to 4.
  • This embodiment is described with reference to FIG. 9, FIG. 10, FIG. 11, and FIG. 12.
  • the difference of this embodiment is that it also has an inlet passage spoiler 3 and an outflow passage spoiler 4, and enters the passage block.
  • the plate 3 is disposed in the refrigerant entering the main passage 1-1
  • the outflow passage spoiler 4 is disposed in the refrigerant outflow main passage 1-2, and enters the passage spoiler 3 and the outflow passage spoiler 4 to have several branch passages 1-5 is divided into an array branch channel 1-5, and a plurality of branch channels 1-5 entering the channel spoiler 3 and the introduction channel 1-3 are the first group branch channel, and enter the channel spoiler 3 and the outflow channel.
  • the plurality of branch channels 1-5 between the spoiler 4 are the second group of branch channels, and the plurality of branch channels 1-5 between the outflow channel baffle 4 and the lead-out channels 1-4 are the third group of branch channels.
  • the embodiment is not limited to three groups of branch channels, and N groups of branch channels can be set as needed; the refrigerant enters the channel 1-3 and enters the refrigerant outflow main channel 1-2 through the first group branch channel.
  • the second group of branch passages enter the refrigerant into the main passage 1-1, and then the third group branch passage enters the refrigerant flow out of the main passage 1-2, and finally Lead outflow channels 1-4, such multiple cycles, a plurality of sets of branch channels formed only 1-5 S-shaped flow path.
  • the S-shaped flow path makes the temperature distribution of the plate surface more balanced.
  • Other compositions and connection relationships are the same as in the sixth embodiment.
  • the main refrigerant entering main channel 1-1 and the refrigerant outflow main channel 1-2 are both plate-fin structure, and the brazing plate type
  • the evaporator or the condenser further includes two waveform split fins 5, and the two waveform split fins 5 are respectively disposed in the refrigerant entering the main passage 1-1 and the refrigerant outflow main passage 1-2, and the waveform split fins 5 are
  • the front plate 1 and the rear plate 2 are brazed. Increasing the split fins allows for a more even distribution of refrigerant as it flows through the branch channels.
  • Other compositions and connection relationships are the same as in any one of Embodiments 1 to 3.
  • the waveform split fins 5 of the present embodiment are corrugated fins, and each of the corrugated fins 5 has a plurality of shunt holes 5 in the longitudinal direction. 1.
  • the pore diameters of the plurality of split holes 5-1 are gradually increased from the refrigerant inlet end or the outflow end to the distal end thereof, and the refrigerant inlet or outlet end of the plurality of split holes 5-1 The distance between the two shunt holes 5-1 adjacent to the distal end thereof gradually decreases.
  • the plurality of split holes 5-1 from the refrigerant inlet end to the refrigerant outflow end are the first split hole 5-1, the second split hole 5-1, the third split hole 5-1, and the fourth The split hole 5-1...
  • the diameter of the first split hole 5-1 is The diameter of the second split hole 5-1 is The diameter of the third split hole 5-1 is And so on;
  • the distance between the first split hole 5-1 to the second split hole 5-1 is S1
  • the distance between the second split hole 5-1 to the third split hole 5-1 is S2
  • third The pitch of each of the branch holes 5-1 to the fourth branch holes 5-1 is S3, and S3 ⁇ S2 ⁇ S1.
  • the entry and exit of the branch passages by controlling the aperture, the hole pitch and the number of holes punched on the waveform split fins 5.
  • the flow rate of the refrigerant is because the pressure of the refrigerant near the inlet or the outlet of the main passage is large, and the distance between the hole near the inlet or the outlet is large, the diameter of the hole is small, and the number of holes is small, so that the refrigerant can be ensured on the plate.
  • the in-plane distribution is more uniform.
  • the other components and connection relationships are the same as those of the eighth embodiment.
  • Embodiment 10 In this embodiment, the refrigeration device is a refrigerator or a freezer. Other compositions and connection relationships are the same as in the ninth embodiment.
  • Step 1 stamping the front plate 1 and the rear plate 2; using the mold to press the refrigerant into the main channel 1-1, the refrigerant outflow main channel 1-2 and several branch channels 1-5;
  • Step 2 cleaning the front plate 1 and the rear plate 2; cleaning with a neutral cleaning agent or acid-base water;
  • Step 3 fastening the front plate 1 and the rear plate 2;
  • Step 4 The front plate 1 and the rear plate 2 are placed in a brazing furnace, heated to a brazing temperature, and kept for a certain period of time, and then cooled down, the front plate 1 and the rear plate 2 are automatically welded together, and the front plate 1 and the rear are inspected. Whether the plate 2 is leaking; after the front plate 1 and the rear plate 2 are welded together, it is checked whether the front plate 1 and the rear plate 2 are leaked: air or helium gas is passed into the evaporator or the condenser to check whether gas is leaking;
  • Step 5 Process the surface of the brazed evaporator or condenser.
  • solder a filler alloy (solder) whose melting point is lower than that of the base metal alloy, the solder is melted by high temperature heating (the base metal is not melted), so that the liquid solder wets the base material and fills the gap of the plate, and is connected by diffusion. Welding method.
  • the brazing temperature in step 4 is: when the material of the current plate 1 and the rear plate 2 is aluminum, the heating temperature is 580 ° C to 630 ° C, and the current plate 1 and the rear plate 2 are When the material is steel, the heating temperature is 800 ° C to 1250 ° C. When the material of the current plate 1 and the rear plate 2 is copper, the heating temperature is 180 ° C to 950 ° C, and the holding time in the fourth step is 10 minutes. 40 minutes. Other methods are the same as those of the eleventh embodiment.
  • the treatment method in step 5 is performed by sanding, painting, coloring, anodizing, electrophoretic painting, electrostatic spraying, hydrophilic or hydrophobic. Other methods are the same as those of the eleventh embodiment.
  • the first main passage a refrigerant is introduced into the main passage 1-1 and the refrigerant outflow main passage 1-2 on the fastening surfaces of the front plate 1 and the rear plate 2; according to the flow rate and the flow of the refrigerant, the passage is required
  • the waveform split fins 5 can be placed or not placed.
  • the second main channel two parallel disposed refrigerants are formed on the fastening surfaces of the front plate 1 and the rear plate 2 into the main passage 1-1 and two parallel refrigerant discharge main passages 1-2;
  • the third main passage three or more parallel refrigerants are formed on the fastening surfaces of the front plate 1 and the rear plate 2 into the main passage 1-1, and three or more parallel refrigerant discharge main passages are arranged. 1-2;
  • the first type of branch channel parallel flow channel, see Figure 1;
  • the second branch channel a diamond-shaped cross flow channel, see Figure 7;
  • the third branch channel honeycomb cross flow channel, see Figure 8;
  • the above three main channels and the three branch channels can be arbitrarily combined.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un évaporateur ou condenseur à plaque brasée pour un dispositif de réfrigération et son procédé de fabrication. L'évaporateur ou le condenseur comprend une plaque avant (1) et une plaque arrière (2). La plaque avant (1) et la plaque arrière (2) viennent en prise l'une avec l'autre, et sont reliées par brasage. Une surface de mise en prise est pourvue d'un canal principal d'entrée de fluide frigorigène (1-1), d'un canal principal de sortie d'écoulement de fluide frigorigène (1-2) et de multiples canaux de dérivation (1-5). Une extrémité de chaque canal de dérivation (1-5) est en communication avec le canal principal d'entrée de fluide frigorigène (1-1), et l'autre extrémité de chaque canal de dérivation (1-5) est en communication avec le canal principal de sortie d'écoulement de fluide frigorigène (1-2). Le procédé de fabrication comprend: l'étape 1 consistant à estamper une plaque avant (1) et une plaque arrière (2); l'étape 2 consistant à nettoyer la plaque avant (1) et la plaque arrière (2); l'étape 3 consistant à amener la plaque avant (1) à venir en prise avec la plaque arrière (2); l'étape 4 consistant à placer la plaque avant (1) et la plaque arrière (2) dans un four de brasage, à réaliser un chauffage pour atteindre une température de brasage, à maintenir la température pendant une certaine durée, puis à abaisser la température et à sortir la plaque avant (1) et la plaque arrière (2) du four de brasage de telle sorte que la plaque avant (1) et la plaque arrière (2) soient automatiquement brasées ensemble, et à confirmer si la plaque avant (1) et la plaque arrière (2) sont étanches à l'air; et l'étape 5 consistant à effectuer un traitement de surface sur l'évaporateur ou le condenseur brasé.
PCT/CN2018/072473 2017-01-18 2018-01-12 Évaporateur ou condenseur à plaque brasée pour dispositif de réfrigération et son procédé de fabrication WO2018133736A1 (fr)

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CN201710034272.7A CN106766395B (zh) 2017-01-18 2017-01-18 用于制冷设备上的钎焊板式蒸发器或冷凝器及其制作方法

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CN106766395B (zh) * 2017-01-18 2023-11-24 上海冰鑫科技有限公司 用于制冷设备上的钎焊板式蒸发器或冷凝器及其制作方法
CN108626915A (zh) * 2018-06-22 2018-10-09 河南科隆集团有限公司 冰箱/冰柜上使用的平行流蒸发器

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