CN204438867U - The two distributor plate-type heat exchanger in a kind of diagonal angle - Google Patents

Abstract

The utility model provides a diagonal double-distributor type plate heat exchanger, on which a group of corrugated sheets is provided. Four corner holes, one of which is provided with a first distributor next to the corner hole, and a second distributor is arranged on the side wall of the diagonal hole; the first distributor includes annular inner convex ribs and outer convex ribs, and the outer convex ribs The height of the inner rib is higher than that of the inner rib, and a fluid chamber is formed between the inner rib and the outer rib; the second distributor includes two axial distribution holes communicated with the corner holes of the second corrugated plate, and there is a gap between the distribution holes Equipped with curved distribution plate. The utility model provides a diagonal double distributor type plate heat exchanger, through the double distributors arranged diagonally on the corrugated plate, the fluid is fully mixed, the fluid flow is uniform, and the flow resistance is low, which further improves the efficiency of the plate heat exchanger. The heat exchange efficiency of the heater.

Description

A Diagonal Double Distributor Type Plate Heat Exchanger

technical field

The utility model relates to the field of plate heat exchanger manufacture, in particular to a diagonal double distributor type plate heat exchanger.

Background technique

Plate heat exchangers can give full play to their advantages in single-phase heat exchange conditions, but in two-phase heat exchange conditions, due to the large differences in physical properties and flow states of gas-liquid two-phase fluids, it is difficult to achieve uniform fluid distribution and The flow in the channel between the plates flows evenly. When the high-pressure liquid refrigerant, especially the gas-liquid two-phase mixed refrigerant, is sprayed out from the distributor hole, it cannot achieve sufficient atomization, which affects the rapid volatilization of the liquid refrigerant and increases the flow rate. resistance, reducing the heat transfer performance of the heat exchanger. In addition, in the flow channel composed of uniformly distributed corrugated plates, the flow distribution of the fluid is uneven. The flow velocity in the area near the straight line from the inlet to the outlet is relatively high, and the farther away from this area, the smaller the flow velocity. The uneven flow distribution in the flow channel will lead to The flow resistance increases and the heat transfer performance of the heat exchanger decreases. After the gas-liquid two-phase mixed refrigerant enters the distributor, it cannot be fully mixed, resulting in a large flow resistance, and the flow cannot be effectively and evenly distributed and evenly flowed in the flow channel between the plates, resulting in a large pressure drop of the heat exchanger and poor heat transfer performance. Reduced performance. Therefore, it is necessary to further improve the structure of the plates and distributors of plate heat exchangers, improve the fluid flow uniformity of the plates, reduce the flow resistance, and fully mix the cold and hot media to obtain the best heat exchange performance.

Contents of utility model

In view of the above problems, the utility model provides a novel plate heat exchanger.

The technical solution adopted by the utility model is to construct a diagonal double distributor type plate heat exchanger, on which a group of corrugated sheets is provided. There are four corner holes on the corrugated plate, a first distributor is arranged beside one corner hole, and a second distributor is arranged on the side wall of the corner hole; the above-mentioned first distributor includes an annular inner rib and an outer a convex rib, the height of the outer rib is higher than that of the inner rib, and a fluid chamber is formed between the inner rib and the outer rib; the second distributor includes two shafts communicated with the corner holes of the second corrugated plate To the distribution holes, an arc-shaped distribution plate is also arranged between the above distribution holes. The first distributor and the second distributor are arranged on the same plate, which reduces the number of parts in the use of the plate heat exchanger, and the two distributor structures are stamped and formed through the mold at one time, reducing the number of plates in the assembly process The incidence of installation errors. At the same time, there are two fluid distributors between every two layers of plates in the plate heat exchanger, so that the fluid distribution is more uniform and the mixing is more sufficient.

Furthermore, a plurality of medium dispersion grooves are arranged on the outer rib, and the bottom of the distribution and dispersion groove is lower than the highest point of the inner rib and higher than the lowest point of the fluid chamber. It is beneficial to reduce the flow resistance and at the same time, force the fluid to start flowing along the plate corrugations on the other side away from the fluid distributor, so that the fluid flow distribution between the plates is more uniform and the heat exchange efficiency of the plates is improved.

Further, the cross-section of the dispersion groove is arc-shaped or elliptical-arc.

Further, the above-mentioned multiple dispersion grooves are distributed in a spiral centrifugal type or radially around the center of the corner hole. The fluid is forced to flow along the plate corrugations on the other side away from the fluid distributor, so that the fluid flow distribution between the plates is more uniform and the heat exchange efficiency of the plates is improved.

Further, the side of the second distributor is provided with an annular countertop, and the annular countertop and the upper end surface of the second corrugated plate form a cylindrical cavity. Primarily used for thorough mixing.

Further, both the above-mentioned corrugated plate and the second corrugated plate are provided with a plurality of bosses and recesses whose positions and shapes match. It is used for clamping and clamping during assembly, making the entire corrugated sheet group more firm and stable.

Furthermore, a plurality of guide grooves are also provided on the above-mentioned inner rib. For fluid guidance and reducing flow resistance.

Further, a plurality of through holes are arranged around the second distributor on the countertop, and the diameter of the through holes is 1-2mm. A plurality of through holes are provided to realize the function of fluid throttling and pressure reduction.

Compared with the prior art, the utility model provides a diagonal double distributor type plate heat exchanger, through the double distributors arranged diagonally on the corrugated plate, the fluid is fully mixed, the fluid flow is uniform, and the flow resistance Low, which further improves the heat exchange efficiency of the plate heat exchanger.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a structural schematic diagram of the corrugated board of the present invention.

Fig. 3 is a schematic structural view of the first dispenser of the utility model.

Fig. 4 is a schematic structural view of the second distributor of the present invention.

Detailed ways

In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can do similar promotions without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below limit.

Below in conjunction with accompanying drawing and embodiment, the specific implementation mode of the utility model is described further.

Example 1

In this embodiment, the structure of the utility model is described in detail with reference to the accompanying drawings.

Please refer to the accompanying drawings, a diagonal double distributor type plate heat exchanger provided by the utility model, the corrugated sheet group includes a plurality of corrugated plates 1 arranged horizontally and reversely stacked at 180 degrees, and the corrugated plates 1 are provided with There are four corner holes, wherein a first distributor 11 is arranged beside one corner hole, and a second distributor 21 is arranged on the side wall of its diagonal corner hole; the first distributor 11 includes an annular inner rib 111 and an outer convex Rib 112, the height of the outer rib 112 is higher than the height of the inner rib 111, a fluid cavity 113 is formed between the inner rib 111 and the outer rib 112; There are two axial distribution holes 211, and an arc-shaped distribution plate 212 is arranged between the distribution holes 211.

As preferably, a plurality of medium dispersion grooves 1121 are also provided on the outer rib 112, and the groove bottom of the distribution dispersion groove 1121 is lower than the highest point of the inner rib 111, higher than the lowest point of the fluid chamber 113, and the cross section of the dispersion groove 1121 is Arc-shaped or elliptical arc-shaped, a plurality of dispersing grooves 1121 are distributed spirally centrifugally or radially around the center of the corner hole, and a plurality of guide grooves 1111 are also provided on the inner rib 111 .

Preferably, the side of the second distributor 21 is provided with an annular countertop 213 , and the annular countertop 213 and the upper end surface of the second corrugated plate 1 form a cylindrical cavity. The countertop 213 is also provided with a plurality of through holes 2131 around the second distributor 21, and the diameter of the through holes 2131 is 1-2 mm.

Preferably, both the corrugated plate 1 and the second corrugated plate 2 are provided with a plurality of bosses and pits whose positions and shapes match. It is convenient to assemble and clamp, making the interlayer of the plate heat exchanger more firm and stable.

Although the utility model is disclosed as above with preferred embodiments, it is not used to limit the utility model, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model should be defined by the claims of the utility model.

Claims (8)

1. A diagonal double-distributor type plate heat exchanger, the plate heat exchanger is provided with a corrugated sheet group, which is characterized in that the corrugated sheet group includes a plurality of corrugated sheets stacked horizontally at 180 degrees (1), the corrugated plate (1) is provided with four corner holes, a first distributor (11) is provided beside one of the corner holes, and a second distributor (11) is provided on the side wall of the diagonal corner hole ( 21); the first distributor (11) and the second distributor (21) between any two corrugated plates (1) form a medium distribution channel coaxial with the corner hole; the first distributor ( 11) Including annular inner ribs (111) and outer ribs (112), the height of the outer ribs (112) is higher than the height of the inner ribs (111), the inner ribs (111) and the outer ribs A fluid cavity (113) is formed between the ribs (112); the second distributor (21) includes two axial distribution holes (211) communicating with the corner holes of the second corrugated plate, and the distribution holes (211) Arc-shaped distribution plates (212) are also arranged between them. 2. A diagonal double-distributor type plate heat exchanger according to claim 1, characterized in that, a plurality of medium dispersion grooves (1121) are arranged on the outer rib (112), and the distribution The bottom of the dispersing groove (1121) is lower than the highest point of the internal rib (111) and higher than the lowest point of the fluid chamber (113). 3. The diagonal double-distributor plate heat exchanger according to claim 2, characterized in that, the cross-section of the dispersion groove (1121) is arc-shaped or elliptical-arc. 4. The diagonal double-distributor plate heat exchanger according to claim 2, characterized in that, the plurality of dispersion grooves (1121) are distributed spirally centrifugally or radially around the center of the corner holes. 5. The diagonal double-distributor type plate heat exchanger according to claim 1, characterized in that, the side of the second distributor (21) is provided with an annular countertop (213), and the annular The countertop (213) and the upper end surface of the second corrugated plate (2) form a cylindrical cavity. 6. A diagonal double-distributor plate heat exchanger according to claim 1, characterized in that the corrugated plate (1) and the second corrugated plate (2) are provided with a plurality of positions and shape matching bosses and pits. 7. The diagonal double distributor plate heat exchanger according to claim 1, characterized in that a plurality of guide grooves (1111) are also provided on the inner rib (111). 8. A diagonal double-distributor type plate heat exchanger according to claim 5, characterized in that a plurality of through holes (2131) are arranged around the second distributor on the countertop (213) , the diameter of the through hole is 1-2mm.