WO2018133736A1

WO2018133736A1 - Brazed plate-type evaporator or condenser for refrigeration device and manufacturing method thereof

Info

Publication number: WO2018133736A1
Application number: PCT/CN2018/072473
Authority: WO
Inventors: 马保伟
Original assignee: 上海冰鑫科技有限公司
Priority date: 2017-01-18
Filing date: 2018-01-12
Publication date: 2018-07-26
Also published as: CN106766395B; CN106766395A

Abstract

A brazed plate-type evaporator or condenser for a refrigeration device and a manufacturing method thereof. The evaporator or condenser comprises a front plate (1) and a rear plate (2). The front plate (1) and the rear plate (2) engage with each other, and are connected via brazing. An engagement surface is provided with a refrigerant inlet main channel (1-1), a refrigerant flow outlet main channel (1-2), and multiple branch channels (1-5). One end of each branch channel (1-5) is in communication with the refrigerant inlet main channel (1-1), and the other end of each branch channel (1-5) is in communication with the refrigerant flow outlet main channel (1-2). The manufacturing method comprises: step 1, stamping a front plate (1) and a rear plate (2); step 2, cleaning the front plate (1) and the rear plate (2); step 3, causing the front plate (1) to engage with the rear plate (2); step 4, placing the front plate (1) and the rear plate (2) in a brazing furnace, performing heating to reach a brazing temperature, maintaining the temperature for a certain period of time, then lowering the temperature and taking the front plate (1) and the rear plate (2) out of the brazing furnace such that the front plate (1) and the rear plate (2) are automatically brazed together, and confirming whether the front plate (1) and the rear plate (2) are airtight; and step 5, performing surface treatment on the brazed evaporator or condenser.

Description

Brazed plate evaporator or condenser for use in refrigeration equipment and method of making same

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201710034272.7, entitled "Brazed Plate Evaporator or Condenser for Refrigeration Equipment and Its Manufacturing Method", filed on January 18, 2017 by the Chinese Patent Office, The entire contents of this application are incorporated herein by reference.

Technical field

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.

Background technique

At present, there are mainly four types of 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.

(1) 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.

(2) Wire tube evaporator or condenser: 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.

(3) Inflatable evaporator: The 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.

(4) Finned tube evaporator: 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.

Summary of the invention

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.

The technical solution adopted by the present invention to solve the above technical problems is:

A brazed plate evaporator or condenser for use in a refrigeration apparatus, the evaporator or condenser 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 main passage, the refrigerant flows out of the main passage and the plurality of branch passages, one end of each branch passage communicates with the refrigerant entering the main passage, and the other end of each branch passage communicates with the refrigerant outflow main passage.

Further, the refrigerant enters the main passage, the refrigerant outflow main passage and the plurality of branch passages are convex flow passages on any one of the front plate or the rear plate; or the refrigerant enters the main passage, 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.

Further, 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 For two or more channels arranged in parallel, 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.

Further, the plurality of branch channels are parallel flow channels, diamond cross flow channels or honeycomb cross flow channels.

Further, 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.

Further, 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 lead channel.

Further, the main refrigerant enters the main passage and the refrigerant outflow main passage is a plate-fin structure, and 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.

Further, 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.

Further, 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.

Compared with the prior art, the invention has the following beneficial effects:

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

Seventh, 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.

8. 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.

9. 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.

10. 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.

DRAWINGS

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;

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the present embodiment will be described with reference to FIG. 1 to FIG. 6. 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.

By pressing a dense and small refrigerant passage on the fastening surface, the refrigerant coverage area can be maximized, the usage amount is the smallest, and the cooling and heat dissipation efficiency are the highest. By brazing, 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.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments are described with reference to FIG. 1 to FIG. 6. 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. In the case of evaporators for refrigerators and freezers, 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. A large amount of insulation materials, metal materials and electrical energy. For the condenser of refrigerator and freezer refrigeration equipment, 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. For the external condenser, 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. For special double-sided refrigerating devices, 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.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 4: 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. .

When the cross-sectional area of the refrigerant entering the main passage 1-1 is small, it is necessary to set the refrigerant into the main passage 1-1 as two or more passages; when the cross-sectional area of the refrigerant flowing out of the main passage 1-2 is large, it is required 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. Other compositions and connection relationships are the same as in the first embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS V. 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. In order to ensure the cooling capacity and heat dissipation of the evaporator or condenser, 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.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Sixth embodiment: The present embodiment is described with reference to FIG. 1. In this embodiment, 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.

BEST MODE FOR CARRYING OUT THE INVENTION Seventh Embodiment: 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, and 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. By way of example, 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. Then, 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.

BEST MODE FOR CARRYING OUT THE INVENTION Eighth: The present embodiment will be described with reference to FIG. 13 to FIG. 18. In this 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.

9 is a description of the present embodiment. 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. In order to ensure uniform distribution of the refrigerant, 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. For example, 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. In order to ensure that the refrigerant flow near the introduction and exit conduits and away from the lead-in and lead-out conduits is similar, we can adjust 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.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 11 This embodiment is described with reference to FIG. 1. The present embodiment is implemented by the following steps:

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.

Brazing - using 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.

Embodiment 12: In this embodiment, 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.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 13: In this 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.

In the above embodiment, there are three main channels and three or more branch channels:

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.

Claims

A brazed plate evaporator or condenser for use in a refrigeration apparatus, characterized in that the evaporator or condenser comprises a front plate (1) and a rear plate (2), a front plate (1) and a rear plate ( 2) The buckle is combined with the brazed joint, and refrigerant is formed on the fastening surface into the main passage (1-1), the refrigerant outflow main passage (1-2) and several branch passages (1-5), each branch One end of the passage (1-5) communicates with the refrigerant entering the main passage (1-1), and the other end of each branch passage (1-5) communicates with the refrigerant outflow main passage (1-2).
A brazed plate evaporator or condenser for use in a refrigerating apparatus according to claim 1, wherein said refrigerant enters the main passage (1-1), the refrigerant flows out of the main passage (1-2), and A plurality of branch passages (1-5) are convex flow passages on any one of the front plate (1) or the rear plate (2), or the refrigerant enters the main passage (1-1), and the refrigerant The agent outflow main channel (1-2) and the plurality of branch channels (1-5) are formed by the convex flow path on the front plate (1) and the convex flow path on the rear plate (2).
A brazed plate evaporator or condenser for use in a refrigerating apparatus according to claim 1, wherein said refrigerant enters the main passage (1-1) as two or more parallelly disposed passages. The two or more refrigerants enter the main passage (1-1) and communicate through the plurality of split sub-channels (1-6); the refrigerant flows out of the main passage (1-2) in two or three parallel arrangements Channel, the two or more refrigerants flowing out of the main channel (1-2) are connected through a plurality of split sub-channels (1-6), and the cross-sectional area of the split sub-channels (1-6) is changed to control The flow rate of the refrigerant in the sub-channels (1-6).
A brazed plate evaporator or condenser for use in a refrigerating apparatus according to any one of claims 1 to 3, wherein said plurality of branch passages (1-5) are parallel flow passages , diamond-shaped cross flow channel or honeycomb cross flow channel.
A brazed plate evaporator or condenser for use in a refrigeration apparatus according to any one of claims 1 to 3, characterized in that on the fastening faces of the front plate (1) and the rear plate (2) Further, an outwardly protruding introduction passage (1-3) and an outwardly convex extraction passage (1-4) are provided, and the introduction passage (1-3) communicates with the refrigerant into the main passage (1-1) to lead out The passage (1-4) is in communication with the refrigerant outflow main passage (1-2), and the introduction passage (1-3) and the extraction passage (1-4) are both tubular.
A brazed plate evaporator or condenser for use in a refrigerating apparatus according to claim 5, wherein said evaporator or condenser further comprises an inlet passage spoiler (3) and an outflow passage spoiler ( 4), the inlet passage spoiler (3) is arranged in the refrigerant entering the main passage (1-1), and the outflow passage spoiler (4) is arranged in the refrigerant outflow main passage (1-2) to enter the passage resistance The flow plate (3) and the outflow channel spoiler (4) divide the plurality of branch channels (1-5) into an array branch channel (1-5), and enter the channel spoiler (3) and the introduction channel (1-3). The plurality of branch channels (1-5) between the two groups are the first group of branch channels, and the plurality of branch channels (1-5) between the channel blocker (3) and the outflow channel blocker (4) are The second group of branch channels, the plurality of branch channels (1-5) between the outflow channel spoiler (4) and the lead-out channels (1-4) are the third group of branch channels, and the refrigerant is introduced into the channel (1-3) After entering, the first group of branch passages enter the refrigerant outflow main passage (1-2), and then the second group branch passage enters the refrigerant into the main passage (1-1), and then enters the refrigeration through the third group branch passage. The agent flows out of the main channel (1-2) and finally flows out through the outlet channel (1-4).
A brazed plate evaporator or condenser for use in a refrigerating apparatus according to any one of claims 1 to 3, characterized in that said main refrigerant enters the main passage (1-1) and the refrigerant flows out The main channels (1-2) are all plate-fin structure, the brazed plate evaporator or condenser further comprises two waveform split fins (5), and the two waveform split fins (5) are respectively arranged in the refrigerant Entering the main channel (1-1) and the refrigerant outflow main channel (1-2), the waveform split fin (5) is brazed to the front plate (1) and the rear plate (2), and the waveform is divided into wings. The sheet (5) is a corrugated fin, and each of the corrugated fins (5) has a plurality of split holes (5-1) in the longitudinal direction, and the apertures of the plurality of split holes (5-1) are entered by the refrigerant. The end or the outflow end gradually increases to the distal end thereof, and the distance between the two branching holes (5-1) in the plurality of diverting holes (5-1) from the refrigerant inlet end or the outflow end to the distal end thereof is gradually decreased. .
A brazed plate evaporator or condenser for use in a refrigerating apparatus according to claim 7, wherein said refrigerating apparatus is a refrigerator or a freezer.
A method of fabricating a brazed plate evaporator or condenser for use in a refrigeration apparatus according to claim 1, wherein said method is implemented by the following steps:

Step 1: Stamping the front plate (1) and the rear plate (2);

Step 2: cleaning the front plate (1) and the rear plate (2);

Step 3: fasten 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, kept for a certain period of time, and then cooled, and then the front plate (1) and the rear plate (2) are automatically welded. Check whether the front plate (1) and the rear plate (2) are leaking;

Step 5. Process the surface of the brazed evaporator or condenser.
The method for manufacturing a brazed plate evaporator or condenser for use in a refrigerating apparatus according to claim 9, wherein the brazing temperature in the step four is: a current plate (1) and a rear plate (2) When the material is aluminum, the heating temperature is 580 ° C ~ 630 ° C, when the material of the current plate (1) and the rear plate ( 2 ) is steel, the heating temperature is 800 ° C ~ 1250 ° C, the current plate (1) and When the material of the back plate (2) is copper, the heating temperature is 180 ° C to 950 ° C, and the holding time in the fourth step is 10 minutes to 40 minutes, and the processing method in the step 5 is sanding, painting, coloring. , anodizing, electrophoretic painting, electrostatic spraying, hydrophilic or hydrophobic.