阅读说明：本技术 一种具有八字形分配通道的钎焊换热板片组 (Brazing heat exchange plate group with splayed distribution channels ) 是由 施吉璐 韩维哲 丁国良 于 2019-11-29 设计创作，主要内容包括：本发明属于钎焊板式热交换器技术领域,具体涉及一种具有八字形分配通道的钎焊换热板片组,包括至少两对单元板片组,单元板片组包括层叠设置的第一板片和第二板片,第一板片和第二板片均包括主面板和周围的挡板,主面板设有若干个凸脊,相邻凸脊间形成凹谷,主面板的四角设有四个圆孔,三个为角孔,一个为分配孔,第一板片的分配孔设有第一八字形凹槽,第二板片的分配孔设有第二八字形凹槽,第一八字形凹槽与第二八字形凹槽配合形成八字形分配通道,该通道靠近分配孔一端较窄。本换热板组的八字形分配通道靠近分配孔一端较窄,保证较小的冷媒入口,使冷媒均匀分配至各流道,但整个通道越往里空间越大,避免通道在钎焊时发生堵塞,提高良品率。(The invention belongs to the technical field of brazed plate heat exchangers, and particularly relates to a brazed heat exchange plate group with splayed distribution channels, which comprises at least two pairs of unit plate groups, wherein each unit plate group comprises a first plate and a second plate which are stacked, each first plate and each second plate comprise a main panel and surrounding baffle plates, each main panel is provided with a plurality of convex ridges, valleys are formed between every two adjacent convex ridges, four round holes are formed in four corners of each main panel, three of the convex ridges are corner holes, one of the convex ridges is a distribution hole, a first splayed groove is formed in the distribution hole of each first plate, a second splayed groove is formed in the distribution hole of each second plate, the first splayed groove and the second splayed groove are matched to form the splayed distribution channel, and one end of the channel, which is close to the distribution hole. The splayed distribution channel of the heat exchange plate group is narrow close to one end of the distribution hole, a small refrigerant inlet is guaranteed, refrigerants are uniformly distributed to the flow channels, but the space of the whole channel is larger inwards, the channel is prevented from being blocked during brazing, and the yield is improved.)

1. The utility model provides a brazing heat transfer slab group with splayed distribution channel, includes at least two pairs of unit slab groups, every is to unit slab group is including first slab (1) and second slab (2) of range upon range of setting, first slab (1) and second slab (2) all include main panel and baffle (3) on every side, be equipped with a plurality of convex ridge (41) on the main panel, form valley (42) between adjacent convex ridge (41), the four corners of main panel is equipped with four round holes, its characterized in that: the round hole is angle hole (43), one the round hole is distribution hole (44), the distribution hole (44) department of first slab (1) is equipped with first splayed recess (11), the distribution hole (44) department of second slab (2) is equipped with second splayed recess (21), first splayed recess (11) and second splayed recess (21) cooperation form splayed distribution channel (5), the one end that splayed distribution channel (5) are close to distribution hole (44) is the narrower one end of splayed.

2. The brazed heat exchanger plate package with splayed distribution channels according to claim 1, wherein: the distribution hole (44) of the first plate (1) is provided with a circle of ring plates (12) around, the ring plates (12) are provided with a circle of first bosses (13) around, each first boss (13) comprises a first slope (131), a first convex surface (132) and a connecting slope (133), each first slope (131) extends towards the direction of the corresponding ridge (41) along the edge of each ring plate (12) and inclines towards the direction opposite to the center of the distribution hole (44), each first convex surface (132) extends outwards along the edge of each first slope (131) in the radial direction of the distribution hole (44) and is connected with the main panel through the corresponding connecting slope (133), and each first splayed groove (11) is arranged on each ring plate (12) and is concave towards the corresponding first convex surface (132).

3. The brazed heat exchanger plate package with splayed distribution channels according to claim 2, wherein: the ring sheet (12) is flush with the bottom of the valley (42), and the height of the first boss (13) is equal to that of the ridge (41).

4. The brazed heat exchanger plate package with splayed distribution channels according to claim 2, wherein: the depth of the first splayed groove (11) is half of the height of the first boss (13).

5. The brazed heat exchanger plate package with splayed distribution channels according to claim 2, wherein: the second plate (2) is provided with a circle of second bosses (22) around the distribution hole (44), the second bosses (22) comprise second slopes (221) and second convex surfaces (222), the second slopes (221) extend along the edges of the distribution hole (44) towards the ridges (41) and incline towards the center of the distribution hole (44), the second convex surfaces (222) extend inwards along the edges of the second slopes (221) in the radial direction of the distribution hole (44), and the second splayed grooves (21) are arranged on the second convex surfaces (222) and are concave towards the distribution hole (44).

6. The brazed heat exchanger plate package with splayed distribution channels according to claim 5, wherein: the height of the second boss (22) is equal to that of the ridge (41), and the width of the first convex surface (132) is equal to that of the second convex surface (222).

7. The brazed heat exchanger plate package with splayed distribution channels according to claim 5, wherein: the depth of the second splayed groove (21) is half of the height of the second boss (22).

8. The brazed heat exchanger plate package with splayed distribution channels according to claim 1, wherein: the splayed distribution channel (5) is positioned on one side of the distribution hole (44) close to the angle hole (43).

9. The brazed heat exchanger plate package with splayed distribution channels according to claim 1, wherein: the ridges (41) are arranged in a herringbone manner from the two axial sides of the first plate (1) or the second plate (2).

10. The brazed heat exchanger plate package with splayed distribution channels according to claim 9, wherein: the herringbone ridges (41) of the first plate (1) and the herringbone ridges (41) of the second plate (2) are opposite in direction.

Technical Field

The invention belongs to the technical field of brazed plate heat exchangers, and particularly relates to a brazed heat exchange plate group with splayed distribution channels.

Background

In refrigeration systems, it is common and indispensable to use brazed plate heat exchangers with distributors as evaporators. In order to achieve good heat exchange effect of the evaporator, the pattern of the heat exchange plate and the size of the distribution holes are important, and the pattern of the distributor and the size of the distribution holes are important, so that the distribution condition of the refrigerant in the evaporator is directly influenced, and the performance of the heat exchanger is influenced.

In the design process of the current evaporator, in order to ensure the heat exchange performance, the channel design of the distribution holes is usually smaller, but after the channel is smaller, the distribution channels of the evaporator are easily blocked due to uncontrollable copper melting in the copper brazing process of the evaporator in a vacuum furnace. As shown in fig. 1, although the conventional heat exchanger plate ensures a small distribution channel (conventional uniform-section distribution channel 91), the conventional uniform-section distribution channel 91 is narrow as a whole, and the molten copper foil has a large flow resistance during brazing of a product, and is likely to be jammed during the flow process, thereby causing channel blockage. Once the distribution hole channel is blocked in the evaporator, the heat exchange channel of the evaporator is blocked, and the pressure difference inside the heat exchanger is unbalanced after the heat exchange channel is blocked, so that the heat exchanger is scrapped. If the problem can not be effectively solved, the yield can not be ensured, the performance and the service life of the product can not be effectively ensured, and the instability of the product to a great extent is caused.

Disclosure of Invention

The invention discloses a brazing heat exchange plate group with splayed distribution channels, which aims to solve the problems that the channels are easy to block due to the fact that the cross section of the distribution hole channels is small, and accordingly yield is low and product stability is poor.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a brazing heat transfer slab group with splayed distribution channel, includes two at least pairs of unit slab groups, and is every right unit slab group is including first slab and the second slab of range upon range of setting, first slab and second slab all include main panel and baffle on every side, be equipped with a plurality of convex ridge on the main panel, form the valley between the adjacent convex ridge, the four corners of main panel is equipped with four round holes, and is three the round hole is the angular hole, one the round hole is the distribution hole, the distribution hole department of first slab is equipped with first splayed recess, the distribution hole department of second slab is equipped with second splayed recess, first splayed recess forms splayed distribution channel with the cooperation of second splayed recess, the one end that splayed distribution channel is close to the distribution hole is the narrower one end of splayed.

Preferably, the ring piece is arranged around the distribution hole of the first plate, the ring piece is provided with a ring of first bosses, each first boss comprises a first slope, a first convex surface and a connecting slope, each first slope extends along the edge of the ring piece to the direction of the corresponding ridge and inclines towards the direction opposite to the center of the distribution hole, each first convex surface extends outwards along the edge of each first slope in the radial direction of the distribution hole and is connected with the corresponding main panel through the corresponding connecting slope, and the first splayed grooves are formed in the ring piece and are concave towards the first convex surfaces.

Preferably, the ring piece is flush with the bottom of the valley, and the height of the first boss is equal to that of the ridge.

Preferably, the depth of the first splayed groove is half of the height of the first boss.

Preferably, the second plate has a circle of second bosses around the dispensing hole, the second bosses include second slopes and second convex surfaces, the second slopes extend along the edges of the dispensing hole in the direction of the ridges and are inclined toward the center of the dispensing hole, the second convex surfaces extend along the edges of the second slopes in the radial direction of the dispensing hole, and the second splayed grooves are formed in the second convex surfaces and are recessed toward the dispensing hole.

Preferably, the height of the second projection is equal to the height of the ridge, and the width of the first convex surface is equal to the width of the second convex surface.

Preferably, the depth of the second splay groove is half of the height of the second boss.

Preferably, the splayed dispensing channel is located on a side of the dispensing aperture adjacent to the corner aperture.

Preferably, the ridges are arranged in a herringbone pattern from the central axial sides of the first plate or the second plate.

Preferably, the herringbone ridges of the first plate and the herringbone ridges of the second plate are opposite in direction.

The invention has the following beneficial effects: according to the invention, the first splayed groove is arranged on the distribution hole of the first plate, the second splayed groove is arranged on the distribution hole of the second plate, so that the first splayed groove and the second splayed groove are matched to form a splayed distribution channel, one end of the splayed distribution channel close to the distribution hole is a splayed narrower end, a smaller refrigerant inlet is ensured, the refrigerant has good flow distribution when entering a flow channel of the heat exchanger, but the more inward the whole channel is, the larger the space is, the flow resistance of molten copper in the brazing process is reduced, the blockage of the distribution channel in the brazing process is avoided, and the yield and the product stability can be effectively improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a distribution hole channel structure in a prior brazed heat exchange plate;

FIG. 2 is a schematic view of a heat exchange plate assembly according to the present invention;

FIG. 3 is an enlarged view of a portion a of FIG. 2;

FIG. 4 is a schematic view of the construction of a first plate of the present invention;

FIG. 5 is an enlarged view of portion b of FIG. 4;

FIG. 6 is a schematic view of the construction of a second plate of the present invention;

FIG. 7 is an enlarged view of portion c of FIG. 6;

in the figure: 1. a first sheet; 11. a first splayed groove; 12. a ring sheet; 13. a first boss; 131. a first slope; 132. a first convex surface; 133. connecting a slope; 2. a second sheet; 21. a second splayed groove; 22. a second boss; 221. a second slope; 222. a second convex surface; 3. a baffle plate; 41. a raised ridge; 42. a valley; 43. corner holes; 44. a dispensing aperture; 5. a splayed distribution channel; 8. a plate without distribution holes; 91. a uniform cross-section distribution channel.

Detailed Description

The present invention will now be described in further detail with reference to examples.

The utility model provides a brazing heat transfer plate group with splayed distribution channel, includes at least two pairs of unit plate groups, and every pair of unit plate group is including the first slab 1 and the second slab 2 of range upon range of setting, and first slab 1 and second slab 2 all include main panel and baffle 3 on every side, are equipped with a plurality of convex ridge 41 on the main panel, form valley 42 between the adjacent convex ridge 41, and the four corners of main panel is equipped with four round holes, its characterized in that: the three round holes are angular holes 43, one round hole is a distribution hole 44, a first splayed groove 11 is arranged at the distribution hole 44 of the first plate sheet 1, a second splayed groove 21 is arranged at the distribution hole 44 of the second plate sheet 2, the first splayed groove 11 and the second splayed groove 21 are matched to form a splayed distribution channel 5, and one end, close to the distribution hole 44, of the splayed distribution channel 5 is a splayed narrow end.

First splayed recess 11 and second splayed recess 21 constitute splayed distribution channel 5, the one end that splayed distribution channel 5 is close to distribution hole 44 is the narrower one end of splayed, guarantee less refrigerant entry, make in refrigerant can evenly distributed each runner, but whole distribution channel is more big toward the interior space more, reduce the flow resistance of the in-process molten copper of brazing, make molten copper can pass through splayed distribution channel 5 smoothly, avoid distribution channel to take place to block up in the brazing process, can effectively improve yields and product stability.

As shown in fig. 2-3, there is one more water channel than coolant channel in a general heat exchanger, so when assembling the heat exchange plate group into a heat exchanger, the two heat exchange plates located at the outermost side all use plates 8 without distribution holes.

In a particular embodiment, as shown in fig. 4-5, the first plate 1 has a ring of annular sheets 12 around the distribution hole 44, the ring of annular sheets 12 has a ring of first bosses 13 around the ring, the first bosses 13 include first slopes 131, first convex surfaces 132 and connecting slopes 133, the first slopes 131 extend along the edges of the annular sheets 12 toward the ridges 41 and are inclined toward the direction opposite to the center of the distribution hole 44, the first convex surfaces 132 extend along the edges of the first slopes 131 in the radial direction of the distribution hole 44 and are connected to the main panel by the connecting slopes 133, and the first splay grooves 11 are provided on the annular sheets 12 and are recessed toward the first convex surfaces 132.

In one particular embodiment, as shown in fig. 4-5, the ring plate 12 is flush with the bottom of the valley 42 and the first boss 13 is at the same height as the ridge 41.

In a specific embodiment, as shown in fig. 4-5, the depth of the first splay groove 11 is half the height of the first boss 13. In a specific embodiment, the depth of the first splayed groove 11 may be adjusted according to specific flow requirements.

In a particular embodiment, as shown in fig. 6 to 7, the second plate 2 has a circle of second projections 22 around the distribution hole 44, the second projections 22 include a second slope 221 and a second convex surface 222, the second slope 221 extends along the edge of the distribution hole 44 toward the ridge 41 and is inclined toward the center of the distribution hole 44, the second convex surface 222 extends along the edge of the second slope 221 in the radial direction of the distribution hole 44, and the second octagonal groove 21 is provided on the second convex surface 222 and is recessed toward the distribution hole 44.

In one embodiment, as shown in FIGS. 6-7, the height of the second land 22 is equal to the height of the ridge 41, and the width of the first convex surface 132 is equal to the width of the second convex surface 222.

In a specific embodiment, as shown in fig. 6-7, the depth of the second chevron shaped groove 21 is half the height of the second boss 22. In particular embodiments, the depth of the second splayed groove 21 may be adjusted according to specific flow requirements.

In one embodiment, as shown in FIGS. 6-7, the splayed dispensing channel 5 is located on the side of the dispensing orifice 44 adjacent to the corner hole 43.

In one particular embodiment, the ridges 41 are arranged in a chevron pattern from the central axial sides of the first or second panel 1, 2, as shown in fig. 6-7.

In one particular embodiment, as shown in FIGS. 6-7, the chevron ridge 41 of the first plate 1 and the chevron ridge 41 of the second plate 2 are in opposite directions.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.