Heat exchanger and method of manufacture, and dehydration apparatus

(19)

(11)

EP 0 735 335 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.01.1998 Bulletin 1998/03

(43)	Date of publication A2:
	02.10.1996 Bulletin 1996/40

(21)	Application number: 96301679.5

(22)	Date of filing: 12.03.1996

(51)	International Patent Classification (IPC)⁶: F28D 7/02, F28F 1/16

(84)	Designated Contracting States:
	DE FR GB IT

(30)

Priority:

27.03.1995 GB 9506184

(71)	Applicant: MDH LIMITED
	Andover, Hampshire SP10 5AA (GB)

(72)	Inventor:
	Martin, Anthony Michael Andover, Hampshire SP10 2EF (GB)

(74)	Representative: Kiddle, Simon John et al
	Mewburn Ellis, York House, 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)

(54)	Heat exchanger and method of manufacture, and dehydration apparatus

(57) A heat exchanger is provided comprising a coiled duct (1) having fins (5) integrally formed with the duct. A first fluid, typically a refrigerant fluid is passed through the interior (3a, 3b, 3c, 3d) of the duct, and a second fluid, typically a sterilant gas to be dried is passed over the exterior of the duct, over the fins. A method of forming the coiled heat exchanger from a straight section of duct, formed as an extrusion with integral fins, without flattening the fins is disclosed. The invention can provide a compact efficient heat exchanger which is readily manufactured.

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