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A heat exchanger for cooling enclosures, typically electronic enclosures, has a box with a heat pipe type exchange element and upper and lower fan units. A novel element holder and box structure and arrangement of components provides for safety, NEMA-12 sealing, easy access and cleaning without tool

A heat exchanger for cooling enclosures, typically electronic enclosures, has a box with a heat pipe type exchange element and upper and lower fan units. A novel element holder and box structure and arrangement of components provides for safety, NEMA-12 sealing, easy access and cleaning without tools, and enables the exchanger to be inverted end-for-end and mounted either on the inside or outside of the exchanger while providing a cover that easily comes off for service. The exchanger has an ambient fan and motor and a heat load fan and motor normally inside the box, and both fan and motors and the exchanger are movable to alternative positions for service. A method of servicing a heat exchanger is provided wherein two fans and motors, and a heat exchanger sequentially are unlocked and moved to alternative service positions.

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1. A heat exchanger for cooling, comprising; a) a box having a frame and an openable cover; b) a heat exchange element operatively positioned within the box; c) means for separating the element into heat expelling and heat extraction zones; d) first air moving means in an operative position in

1. A heat exchanger for cooling, comprising; a) a box having a frame and an openable cover; b) a heat exchange element operatively positioned within the box; c) means for separating the element into heat expelling and heat extraction zones; d) first air moving means in an operative position in the box for drawing and expelling a flow of ambient air in a passageway extending over said expelling zone; e) second air moving means in an operative position in the box for drawing and expelling a flow of heat load air in a passageway extending through the extraction zone; f) means for removing said heat exchange element from said box when said cover is opened, enabling access to both sides of the element for easy cleaning thereof; g) first mounting means inside of said box for moving said first air moving means from a normal operative position inside said box to an alternative service position outside of said box for cleaning and service; h) second mounting means inside of said box and separate from first means, for moving said second air moving means from a normal operative position inside said box to an alternative service position outside of said box for cleaning and service; and in which i) said heat exchange element is physically dispensed in between said first mounting means and said second mounting means, removal of said heat exchange element enabling access to one of said first mounting means or said second mounting means. 2. The heat exchanger of claim 1, in which said first mounting means and said second mounting means are both abutted against said heat exchange element. 3. The heat exchanger of claim 1, in which said heat exchange element is a generally upright heat pipe type element, the height of said element extending vertically to the levels of both said first and second air moving means. 4. The heat exchanger of claim 3, in which said element is canted in between said first and second air moving means to form a generally Z-shaped configuration from the side, said first and second mounting means being sealed to said element. 5. The heat exchanger of claim 1, in which said heat exchange element has an abutment which is abutted against said second air moving means is held in its operative position by the element, said first mounting means has an abutment which is abutted against the element so that the element is held in its operative position by the first mounting means, and in which said cover has an abutment which is abutted against the first mounting means so that said first air moving means is held in its operative position by said cover. 6. The heat exchanger of claim 5 in which said cover has an abutment which is abutted against said element. 7. The heat exchanger of claim 5, in which said first mounting means is abutted against said element at the bottom and at a central level of the element, and in which said second mounting means is abutted against said element at a central level and at the top of the element. 8. A heat exchanger for cooling, comprising: a. a box having a frame and an openable cover; b. a heat exchange element centrally positioned within the box; c. means for separating the element into heat expelling and heat extraction zones; d. first air moving means in one end of the box for drawing and expelling a flow of ambient air in a passageway extending over said expelling zone; e. second air moving means in a second end of the box for drawing and expelling a flow of heat load air in a passageway extending through the extraction zone; f. an ambient air outlet and load air inlet on an upper end of the box adjacent a top of the expelling zone of the heat exchange element; g. an ambient air inlet and a load air outlet on a lower end of the box adjacent to a bottom of the extraction zone of the heat exchange element; h. an upper baffle separating said ambient outlet and said expelling zone from said load inlet; i. a lower baffle separating said ambient inlet from said extraction zone and said load outlet; and j. means for removing said element from said box for accessing both sides of said element for cleaning. 9. The exchanger of claim 8, in which said first air moving means is mounted to said upper baffle. 10. The exchanger of claim 2, including a hinge connecting said upper baffle to said box frame, said upper baffle being pivotable between a normal operative position within the box frame and an alternative service position at least partially out of said box frame. 11. The exchanger of claim 10, including lock means operative between said cover and said box frame and said upper baffle for positively locking said upper baffle in the normal operative position. 12. The exchanger of claim 10, including holding means inside of said box frame for holding said upper baffle in the normal operative position. 13. The exchanger of claim 10, in which said first air moving means is mounted to said upper baffle, said first air moving means having a load air fan rearward of said upper baffle. 14. The heat exchanger of claim 10, in which said hinge is adjacent a bottom of the upper baffle, said hinge being approximately at a mid-point of the height of the box frame. 15. The heat exchanger of claim 8, in which said second air means is mounted to said lower baffle. 16. A heat exchanger for cooling, comprising: a. a box having a frame and an openable cover; b. a heat exchange element operatively positioned within the box; c. means for separating the element into heat expelling and heat extraction zones; d. first air moving means in an operative position in the box for drawing and expelling a flow of ambient air in a passageway extending over said expelling zone; e. second air moving means in an operative position in the box for drawing and expelling a flow of heat load air in a passageway extending through the extraction zone; f. quick release element mounting means for accepting and supporting the element within the box; g. first service means for moving said first air moving means to an alternative service position; h. second service means for moving said second air moving means to an alternative service position; i. means on said element for holding said second air moving means in said operative position; j. means on said first service means for holding said element operatively positioned; and k. means on said cover for holding said first air moving means in said operative position. 17. The heat exchanger of claim 16, in which said first service means and said second service means are pivotally secured to said frame. 18. The heat exchanger of claim 16, in which said element separating means has a tongue on each side of the element, said tongue being a portion of said element mounting means. 19. The heat exchanger of claim 18, in which said element mounting means further includes a pair of slots secured to said frame for receiving said tongues to hold said element in its operative position. 20. The heat exchanger of claim 16, in which said holding means on said first service means abut against a bottom of the element and seal against said separating means, and in which holding means on said element seal against a bottom of said second service means and abut against an upper portion of said second service means. 21. A method of servicing a pair of motor driven fans and a heat exchange element in a heat exchanger for cooling, comprising the steps of: a. opening a cover on a heat exchanger box, and thereby unlocking a first motor and fan; b. moving the unlocked fan and motor from a normal operative position to an alternative service position, and thereby unlocking the heat exchange element; c. moving the unlocked heat exchanger element from a normal operative position to an alternative service position providing access to both sides of the element, and thereby unlocking a second motor and fan; d. moving the unlocked second motor and fan from a normal operative position to an alternative service position; and e. reversing said sequence of steps (a) through (d) to return said heat exchanger to normal operation after servicing of said element and both said motors and fans. 22. The method of claim 21, including the further step of firstly unlocking the second motor and fan by the step of opening the cover. 23. The method of claim 21, including the further step of pushing the element against the second motor and fan with the cover. 24. The method of claim 21, in which the first fan and motor are pivotally moved to the alternative position, and in which the second fan and motor are independently pivotally moved to their alternative positions. 25. The method of claim 21, in which the element is slid outwardly in a tongue and groove structure for complete removal of the element from said box.