Heat-exchanging plate, and plate heat exchanger using same

1. A heat exchanging plate, said heat exchanging plate comprising depressions and/or protrusions, wherein said heat exchanging plate is provided with a plurality of heat exchanging units, and at least one inlet and/or at least one outlet of flow paths of said at least one heat exchanging unit are/is restricted, wherein at least one inlet and/or at least one outlet of the flow paths of at least one heat exchanging unit of the plurality of heat exchanging units on said heat exchanging plate have/has a cross-section different from those of the inlets and/or outlets of other neighboring heat exchanging units of the plurality of heat exchanging units.

2. The heat exchanging plate as claimed in claim 1 , wherein at least one inlet and/or at least one outlet of said at least one heat exchanging unit are/is configured to be adjustable, with a layout and welding spot profile of said heat exchanging unit not changed.

3. The heat exchanging plate as claimed in claim 1 , wherein a transitional curved surface between adjacent depressions and/or protrusions in at least one heat exchanging unit of said heat exchanging plate is configured to be restricted.

4. The heat exchanging plate as claimed in claim 2 , wherein

at least one of pressure drop, heat exchanging performance, and volume of the whole plate type heat exchanger is/are configured to be regulated through at least one of the following parameters of at least some areas of said heat exchanging plate:

Ta: edge spacing between two adjacent protrusions or the shortest distance between two adjacent protrusions on said heat exchanging plate,

Tb: edge spacing between two adjacent depressions or the shortest distance between two adjacent depressions, wherein the distance connection line of said Tb and the distance connection line of said Ta intersect with each other in space,

Ha: vertical distance between the highest location of the heat exchanging plate and the lowest location of an upper surface of a depressed transitional curved line connected across Ta,

Hb: vertical distance between the lowest location of the heat exchanging plate and the highest location of a lower surface of a protruded transitional curved line connected across Tb,

Wa: distance between two ends of the curved line corresponding to Ha,

Wb: distance between two ends of the curved line corresponding to Hb,

e: vertical distance between the highest location and depressions on the top surface of the heat exchanging plate, or vertical distance between the lowest location and protrusions on the bottom surface of the heat exchanging plate.

5. The heat exchanging plate as claimed in claim 4 , wherein

the pressure drop on the two sides, heat exchanging performance, volume and/or asymmetry of the heat exchanging plate are/is configured to be regulated by adjusting Ha and Hb of at least some areas to regulate the minimum flow cross-section of the inlet on at least one side of the heat exchanging unit, with Ta and Tb of said at least some areas of the heat exchanging plate not changed.

6. The heat exchanging plate as claimed in claim 5 , wherein

said adjusting of the parameters Ha and Hb comprises increasing Hb while reducing Ha, or reducing Hb while increasing Ha.

7. The heat exchanging plate as claimed in claim 4 , wherein

said parameters satisfy the following relationship:

Ha

≈

Ta

Ta

+

Tb

×

e

,

Hb

≈

Tb

Ta

+

Tb

×

e

.

8. A plate type heat exchanger, comprising, as a stacked plurality, the heat exchanging plates as claimed in claim 1 , a heat exchanging passage being formed between two adjacent stacked heat exchanging plates.

9. The plate type heat exchanger as claimed in claim 8 , wherein the corresponding heat exchanging units in two adjacent heat exchanging plates cooperate with each other to form a basic heat exchanging cell when said heat exchanging passage is formed, and the cross-section shape of at least one inlet of at least one of said basic heat exchanging cells is asymmetric with respect to the plate plane, wherein said plate plane is welding planes of two adjacent heat exchanging plates.

10. The plate type heat exchanger as claimed in claim 9 , wherein the cross-section of said at least one inlet has different heights on the two sides of the plate plane.

11. The plate type heat exchanger as claimed in claim 9 , wherein the center of gravity of the cross-section of said at least one inlet is not on said plate plane.

12. The plate type heat exchanger as claimed in claim 8 , wherein at least one outlet of at least one of said basic heat exchanging cells is asymmetric with respect to the plate plane.

13. The plate type heat exchanger as claimed in claim 8 , wherein when a fluid flows past a plurality of basic heat exchanging cells in said heat exchanging passage, a plurality of said basic heat exchanging cells are configured to allow the fluid to undulate up and down relative to the plate plane.

14. The plate type heat exchanger as claimed in claim 9 , wherein the cross-sectional height and/or cross-sectional area of the cross-section of at least one inlet and/or outlet above said plate plane are/is greater than the cross-sectional height and/or cross-sectional area below said plate plane, and

the cross-sectional height and/or cross-sectional area of the cross-section of at least one inlet and/or outlet above said plate plane are/is smaller than the cross-sectional height and/or cross-sectional area below said plate plane.

15. The plate type heat exchanger as claimed in claim 9 , wherein the center of gravity of the cross-section of said at least one inlet and/or outlet is above and/or below said plate plane.

16. The plate type heat exchanger as claimed in claim 14 , wherein said at least one inlet is arranged alternately or arranged in accordance with a preset rule, and/or

said at least one outlet is arranged alternately or arranged in accordance with a preset rule.

17. The plate type heat exchanger as claimed in claim 9 , wherein a plurality of said basic heat exchanging cells are configured to allow the fluid to undulate up and down relative to the plate plane in a single flow direction and/or a plurality of flow directions of the fluid.

18. The plate type heat exchanger as claimed in claim 9 , wherein

the cross-sectional area of the cross-section of said at least one inlet and/or at least one outlet in one direction on said plate plane is greater than a cross-sectional area of the cross-section in another direction.