Patents

 

Brazed Plate Heat Exchanger.

• Heat exchanger with leakage vent. 

  This construction prevents the two media inside the heat exchanger from mixing in case of leakage. The invention also allows quick detection of the leakage. A separate zone comprises a blocked-off space with leakage vents, where any leakage can be detected. This prevention is standard for all gasket plate heat exchangers and used in most of the brazed plate products from AIA, Termokey, Nagao and Tau Power. This construction is unique and is made available to these companies.

   

• Heat exchanger and method for the manufacturing thereof. 

  This invention relates to fully brazed heat exchangers having an improved durability through protection of the brazed joints by means of a coating. Within the refrigeration industry a substantial demand has arisen for heat exchangers able to withstand ammonia – as the use of freons has been successively prohibited. The invention provides, in a simple and inexpensive manner, leak-proof and resistant heat exchangers that can be utilized with ammonia. The patent sold to GEA Ecobraze, 2002.

 

• Multicircuit heat exchanger.   

  The invention makes it possible to circulate more than two media in the heat exchanger. Through delimiting zones in the heat exchanger package, a further medium can be placed in heat exchange with one of the two media normally being circulated. Several such delimited zones may be arranged in the same heat exchanger package, and the zones may even overlap each other for mutual heat exchange. The patent is used in EC-59 for condenser to water, under cooler for superheating and evaporator to brine. Another example is DH-59 - a heat exchanger produced for district heating.

                                                                            

• Heat Exchanger and Method for drying a Humid Medium.  

  This invention relates to a heat exchanger and a method for drying a humid medium. There is arranged an internal cross-over passage allowing the humid medium to double back on itself in a zone delimited by a barrier. In a first step cooling itself and in a final step heating itself. The separation of water is done inside the heat exchanger. The technology is used in Dryer-59. Nagao Inc. Japan and EP Technology AB Sweden jointly own this patent.

 

• Heat Exchanger with strengthening part. 

  The invention makes it possible to use big ports and high pressure because the bolts take up the power surrounding the connections. This invention will be tested in brazed heat exchangers with a working pressure of 120 bar. A new braze plate heat exchanger with a size of 1 m2 and with ports of 150 mm for working pressure of 30 bar will be in market next year.

   

• Heat Exchanger.   

  Cross flow heat exchanger with open sides and brazed corners. The invention makes it possible to produce products standing high pressure and high temperature up to 650 degrees C with extremely low pressure drops. Products using this technology is mainly gas (Air) to gas (Air) applications. Patent sold to Compact Plate AB Sweden, 2000.

                                                                                            

 

• Heat Exchanger.  

  Cross flow heat exchanger with two open sides and two ports. The invention makes it possible to produce products standing high pressure and high temperature up to 650 degrees C. Products using this technology is mainly gas (Air) to liquid or compressed gas applications. In airplane the BPHE Crossflow-19 is used for compressed air up to 20 bar and 250 degrees C. Patent sold to Compact Plate AB Sweden, 2000.

                                                                                             

 

• Evaporator. 

  Using injector as pump to return liquid back into the evaporator. This method optimises the distribution in two-phase system like evaporators. Oil return to the compressor will also be secured.

 

 

• New pattern for brazed plate heat exchangers.

  This new pattern makes the heat exchanger stronger. The efficiency will also increase. Patent pending.

             

                                         

• Temperature regulator integrated in plate heat exchangers.

  Patent pending.

                                     

• Temperature stabilisator.

  Patent pending.

 

 

 

Gasket Plate Heat Exchanger

• Pre-bended endplates.  

  The invention makes it possible to reduce the thickness of the endplates. If bended endplates is used then it is possible to avoid expansion of the heat exchanger in the middle, in other case it can be caused of the pressure in the circulated media.

                                                                         

 

• Plate Heat Exchanger.  

  The invention makes it possible to reduce the thickness of the plates and also stand higher working pressure. The plate heat exchanger has gaskets arranged on a periphery of the openings and between two adjacent heat exchanger plates in gasket regions. The heat exchanger plates have corrugations extending from the openings in a substantially radial direction and uninterrupted through the gasket regions. Corrugations hills and corrugations troughs of adjacent heat exchanger plates cross at crossing points such that adjacent heat exchanger plates support each other at the crossing points. Crossing points flank the gasket between the adjacent heat exchanger plates.

                                                            

 

Some other patents.

 

• Frameworks for hydraulic press. 

  The invention makes it possible to standardize the frames and reduce the production costs for building hydraulic presses.

                                              

 

• Sealing arrangement in hydraulic press.      

  The invention makes it possible to use rectangular piston in the hydraulic press. For high force it possible to reduce the press size with over 50 %. The deflection can also be reduced dramatically.

 

• Machine with hydraulically controlled countrapressure holding element. 

  The invention makes it more easy for production.