A METHOD OF BARZING A PLATE HEAT EXCHANGER USING SCREEN PRINTED BRAZING MATERIAL; A PLATE HEAT EXCHANGER MANUFACTURING BY SUCH METHOD
First Claim
1. Method for brazing a plate heat exchanger comprising a stack of heat exchanger plates provided with a pressed pattern of ridges and grooves adapted to form contact points between the plates and provide for interplate flow channels for media to exchange heat, said interplate flow channels being in selective fluid communications with port openings provided near corners of the heat exchanger plates, the method including the steps of:
- i. calculating or measuring the exact position of all contact points between the ridges and grooves of the neighboring plates;
ii. applying brazing material close to, but not at, the contact points;
iii stacking heat exchanger plates provided with brazing material to a stack;
iv. placing the stack of heat exchanger plates in a furnace;
v. heating the stack of heat exchanger plates to a temperature sufficient for melting the brazing material; and
vi. allowing the stack of heat exchanger plates to cool down such that the brazing material solidifies and binds the plates together, andwhereinstep ii. includes screen printing the brazing material in half moon shaped, donut-shaped or ( )-shaped patterns neighboring the contact point.
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Accused Products
Abstract
A method for brazing a plate heat exchanger comprising a stack of heat exchanger plates (110,115) is provided with a pressed pattern of ridges (R) and grooves (G) adapted to form contact points between the plates (110, 115) and provide for interplate flow channels for media to exchange heat is provided. The interplate flow channels are in selective fluid communications with port openings (120, 130, 140, 150) provided near corners of the heat exchanger plates (110, 115). The method comprises the following steps:
calculating or measuring the exact position of all contact points between the ridges (R) and grooves (G) of the neighboring plates (110, 115);
applying brazing material (B) close to, but not at, the contact points; stacking heat exchanger plates (110, 115) provided with brazing material to a stack ; placing the stack of heat exchanger plates (110, 115) in a furnace; heating the stack of heat exchanger plates (110, 115) to a temperature sufficient for melting the brazing material (B); and allowing the stack of heat exchanger plates (110, 115) to cool down such that the brazing material (B) solidifies and binds the plates (110, 115) together.
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Citations
14 Claims
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1. Method for brazing a plate heat exchanger comprising a stack of heat exchanger plates provided with a pressed pattern of ridges and grooves adapted to form contact points between the plates and provide for interplate flow channels for media to exchange heat, said interplate flow channels being in selective fluid communications with port openings provided near corners of the heat exchanger plates, the method including the steps of:
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i. calculating or measuring the exact position of all contact points between the ridges and grooves of the neighboring plates; ii. applying brazing material close to, but not at, the contact points; iii stacking heat exchanger plates provided with brazing material to a stack; iv. placing the stack of heat exchanger plates in a furnace; v. heating the stack of heat exchanger plates to a temperature sufficient for melting the brazing material; and vi. allowing the stack of heat exchanger plates to cool down such that the brazing material solidifies and binds the plates together, and wherein step ii. includes screen printing the brazing material in half moon shaped, donut-shaped or ( )-shaped patterns neighboring the contact point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification