The present invention relates to a heat exchanger, in particular a heat exchange plate for a plate-type heat exchanger and a plate-type heat exchanger provided with the heat exchange plate.
In the prior art, plate-type heat exchangers have low strength because the tops of elongated ridges on the heat exchange plates thereof are narrow and the welding point structure leads to concentration of stress.
An object of the present invention is to provide a heat exchange plate for a plate-type heat exchanger, and a plate-type heat exchanger having the heat exchange plate, and to increase the strength of the heat exchange plate of the plate-type heat exchanger by increasing the size of welding parts or connecting parts.
Another object of the present invention is to provide a heat exchange plate for a plate-type heat exchanger, and a plate-type heat exchanger having the heat exchange plate, and to thereby improve the transverse distribution of fluid while increasing the strength of the heat exchange plate of the plate-type heat exchanger.
According to one aspect of the present invention, the present invention provides a heat exchange plate for a plate-type heat exchanger, the heat exchange plate comprising: a heat exchange part; multiple protrusions which project at the heat exchange part from a plate plane to at least one side of the plate plane, the multiple protrusions being arranged along multiple lines; and transitional parts which are located between adjacent protrusions arranged along one of the lines and project to the at least one side of the plate plane; in a direction perpendicular to the line, the size of the top of each protrusion is greater than the size of the top of the transitional part.
According to one aspect of the present invention, the distance from the top of the protrusion to the plate plane is greater than or equal to the distance from the top of the transitional part to the plate plane.
According to one aspect of the present invention, the top of the protrusion is substantially flat.
According to one aspect of the present invention, when viewed in a direction perpendicular to the line, the transitional part has a step between the top of the transitional part and the plate plane.
According to one aspect of the present invention, when viewed in a direction facing the plate plane, the multiple lines are arranged substantially in a V-shaped, W-shaped or wave-shaped pattern.
According to one aspect of the present invention, the distance from the top of the protrusion to the plate plane is greater than the distance from the top of the transitional part to the plate plane, and the distance from the top of the protrusion to the top of the transitional part is less than or equal to the distance from the top of the transitional part to the plate plane.
According to one aspect of the present invention, amongst protrusions and transitional parts arranged along one of the lines, the protrusions are connected via corresponding transitional parts, and together with the transitional parts form an entire ridge.
According to one aspect of the present invention, the top of the protrusion is substantially round.
According to one aspect of the present invention, amongst protrusions and transitional parts arranged along one of the lines, the protrusions are connected via corresponding transitional parts, and together with the transitional parts form an entire ridge; ridges projecting to one side of the plate plane are arranged alternately with ridges projecting to another side, which is opposite to said side, of the plate plane.
According to one aspect of the present invention, protrusions in a ridge projecting to one side of the plate plane are staggered in the longitudinal direction of the ridge with respect to protrusions in an adjacent ridge projecting to the other side of the plate plane.
According to another aspect of the present invention, the present invention provides a plate-type heat exchanger, comprising the heat exchange plate for a plate-type heat exchanger as described above.
By increasing the size of welding parts or connecting parts, the strength of the heat exchange plate of the plate-type heat exchanger is increased.
In addition, compared with heat exchangers with an inverted-V-shaped pattern, the present invention increases the welding area, and at the same time alters the transition between welding points and the bottom surface, to achieve the object of increasing strength. Furthermore, compared with dimple plates, the present invention has a transitional groove between two rows of welding points, to promote transverse fluid distribution. According to the technical solution of the present invention, with regard to the transitional part between two welding points, the distance between the top of the protrusion to the plate plane is greater than the distance from the top of the transitional part to the plate plane, and the pressure drop can be suitably reduced by suitably lowering the height of the transitional part.
In addition, according to the technical solution of the present invention, the welding parts or connecting parts are round, and two plates can be fully welded or connected, whereas the welding parts or connecting parts of an inverted-V-shaped pattern are diamond-shaped, which is not conducive to distribution of stress.
The present invention is explained further below in conjunction with the accompanying drawings and particular embodiments.
A plate-type heat exchanger according to an embodiment of the present invention comprises: end plates and heat exchange plates which form first fluid heat exchange channels and second fluid heat exchange channels. The end plates are disposed on outer sides of the heat exchange plates. The plate-type heat exchanger also comprises: a fluid inlet and a fluid outlet. The heat exchange plates are stacked together, thus first fluid heat exchange channels and second fluid heat exchange channels are formed alternately in a stacking direction. Only one heat exchange plate is provided between at least two adjacent fluid heat exchange channels. The plate-type heat exchanger may be any known plate-type heat exchanger.
Heat exchange plates according to the embodiments of the present invention are described in detail below.
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Embodiment 2 according to the present invention differs from the embodiment above in that the transitional part 16 is provided with a step part.
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The use of steps 18 enables a further improvement in heat exchange performance.
Embodiment 3 according to the present invention differs from embodiment 2 above in that the top of the transitional part and the top of the protrusion 14 are substantially in the same plane.
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Embodiment 4 according to the present invention differs from the embodiments above in that: amongst protrusions 14 and transitional parts 16 arranged along one of the lines, the protrusions 14 are connected via corresponding transitional parts 16, and together with the transitional parts 16 form an entire ridge; ridges projecting to one side of the plate plane are arranged alternately with ridges projecting to another side, which is opposite to said side, of the plate plane. Ridges projecting to one side of the plate plane are arranged alternately with ridges projecting to another side, which is opposite to said side, of the plate plane. Protrusions 14 in a ridge projecting to one side of the plate plane may be staggered in the longitudinal direction of the ridge with respect to protrusions 14 in an adjacent ridge projecting to the other side of the plate plane.
It must be explained that the technical features and solutions in embodiments 1-3 above may be applied to embodiment 4.
Thus, the present invention provides a heat exchange plate for a plate-type heat exchanger, the heat exchange plate comprising: a heat exchange part; multiple protrusions which project at the heat exchange part from a plate plane to at least one side (e.g. one side or two opposite sides) of the plate plane, the multiple protrusions being arranged along multiple lines; and transitional parts which are located between adjacent protrusions arranged along one of the lines and project to the at least one side of the plate plane; in a direction perpendicular to the line, the size of the top of each protrusion is greater than the size of the top of the transitional part.
In the present invention, a V-shaped, W-shaped or wave-shaped pattern is employed, the distance from the top of the protrusion to the plate plane is greater than or equal to the distance from the top of the transitional part to the plate plane, and the distance from the top of the protrusion to the top of the transitional part is less than or equal to the distance from the top of the transitional part to the plate plane. Thus the strength of the heat exchange plate is increased and the fluid diffusion capability is improved, thereby saving material costs and improving the heat exchange performance.
In addition, by employing larger welding parts or connecting parts, the strength of the heat exchange plate is increased.
While the present disclosure has been illustrated and described with respect to a particular embodiment thereof, it should be appreciated by those of ordinary skill in the art that various modifications to this disclosure may be made without departing from the spirit and scope of the present disclosure.
Number | Date | Country | Kind |
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201410081940.8 | Mar 2014 | CN | national |
This application is entitled to the benefit of and incorporates by reference subject matter disclosed in the International Patent Application No. PCT/CN2015/073007 filed on Feb. 13, 2015 and Chinese Patent Application 201410081940.8 filed Mar. 7, 2014.
Filing Document | Filing Date | Country | Kind |
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PCT/CN2015/073007 | 2/13/2015 | WO | 00 |