heat exchanger block having such a housing

The invention relates to a method for providing a heat exchanger block with a housing and to a heat exchanger comprising a heat exchanger block with a housing manufactured by said method.

It is known to manufacture a heat exchanger block and a housing or housing parts of such a heat exchanger block separately and then put the heat exchanger block and the housing or housing parts together in an assembly operation.

This type of assembly does not guarantee a strong and hermetic connection between the heat exchanger block and the housing. In order to provide a strong and hermetic connection between the heat exchanger block and the housing, it is known to use elastomeric seals and/or glue. However, this complicates the method for providing a heat exchanger block with a housing.

It is an object of the invention to simplify a method for providing a heat exchanger block with a housing.

Therefore, the invention provides a method for providing a heat exchanger block with a housing according to any one of claims 1 to 16 and to a heat exchanger according to claim 17 comprising a heat exchanger block and a housing manufactured by said method.

In other words, the present invention provides a method for providing a heat exchanger block with a housing, said heat exchanger block comprising

- air flow passages for exchanging heat energy between a first air flow which can be passed through said heat exchanger block and a second air flow which can be passed through said heat exchanger block;

- a first inlet opening for a first air flow;

- a first outlet opening for said first air flow;

- a second inlet opening for a second air flow; and

- a second outlet opening for said second air flow;

said method comprising: - selecting outer surface regions of said heat exchanger block to be covered by portions of said housing, said selected surface regions being different from said first inlet opening, said first outlet opening, said second inlet opening and said second outlet opening;

- moulding a portion of said housing to each selected outer surface region.

Brief description of the drawings

The following description and drawing show an exemplary embodiment of the present invention with a heat exchanger block and a method of providing a housing to said heat exchanger block in order to provide a heat exchanger comprising said heat exchanger block having said housing.

Fig. 1 is a perspective view of a heat exchanger block according to the embodiment;

Fig. 2 is a perspective view of a mould to be used in the method according to the embodiment;

Fig. 3 shows the mould of Fig. 2 filled with a fluidic polymer;

Fig. 4 shows a method step for providing said heat exchanger block with a housing portion;

Fig. 5A is a perspective view of said heat exchanger block provided with one housing portion;

Fig. 5B is a side view of said heat exchanger block provided with said housing portion;

Fig. 5C is another perspective view of said heat exchanger block provided with said housing portion;

Fig. 6A is a perspective view of a mould to be used in the method according to the embodiment;

Fig. 6B shows the mould of Fig. 6A filled with a fluidic polymer;

Fig. 7 is a perspective view of said heat exchanger block provided with four housing portions;

Fig. 8 is a perspective view of a mould to be used in the method according to the embodiment;

Fig. 9 shows a method step for providing said heat exchanger block with a housing portion;

Fig. 10A is perspective view of said heat exchanger block provided with five housing portions; Fig. 10B is a front view of said heat exchanger block provided with said five housing portions;

Fig. 11A is a first perspective view of a heat exchanger comprising said heat exchanger block having a housing comprising six housing portions;

Fig. 11 B is a second perspective view of said heat exchanger comprising said heat exchanger block having said housing comprising six housing portions; and

Fig. 11C is a third perspective view of said heat exchanger comprising said heat exchanger block having said housing comprising six housing portions.

Fig. 1 is a perspective view of a heat exchanger block B according to the embodiment.

The heat exchanger block B comprises a plurality of first air flow passages AFP1 (shown as solid lines) and a plurality of second air flow passages AFP2 (shown as interrupted lines) adjacent said plurality of first air flow passages for exchanging heat energy between a first air flow AF1 (shown as black arrows) passing through said plurality of first air flow passages AFP1 and a second air flow AF2 (shown as white arrows) passing through said plurality of second air flow passages AFP2.

The first air flow passages AFP1 are defined between a first pair of adjacent heat exchanger plates parallel to each other. Similarly, the second air flow passages AFP2 are defined between a second pair of adjacent heat exchanger plates parallel to each other. The heat exchanger block comprises N stacked plates and (N-1) consecutive pairs of adjacent heat exchanger plates in the stack, with each pair of adjacent heat exchanger plates alternatingly constituting first air flow passages AFP1 and second air flow passages AFP2.

The heat exchanger block B also comprises a first inlet opening region 011 having inlet openings for said first air flow AF1 and a first outlet opening region 012 having outlet openings for said first air flow AF1 as well as a second inlet opening region 021 having inlet openings for said second air flow AF2 and a second outlet opening region 022 having outlet openings for said second air flow AF2.

The heat exchanger block B comprises a first outer surface region B1 and a second outer surface region B2 opposite said first outer surface region B1 , as well as a third outer surface region B3 and a fourth outer surface region B4 opposite said third outer surface region B3, as well as a fifth outer surface region B5 and a sixth outer surface region B6 opposite said fifth outer surface region B5.

Fig. 2 is a perspective view of a first mould M1 or a second mould M2 to be used in the method according to the embodiment. The first and second moulds M1 and M2 have a first cavity C1 and a second cavity C2, respectively with an inner cavity surface CS1 and CS2, respectively. In the exemplary embodiment, the heat exchanger block B and the housing H moulded to it are symmetrical with the first outer surface region B1 and the second outer surface region B2 being symmetrical to each other.

Fig. 3 shows the moulds M1 and M2 of Fig. 2 partially filled with a fluidic polymer FP.

Fig. 4 shows a method step for providing said heat exchanger block B with a first housing portion W1. This method step comprises inserting said first outer surface region B1 of said heat exchanger block B into said partially filled first cavity portion C1 by moving said heat exchanger block B towards said first mould M1 , thereby displacing and spreading said fluidic polymer FP within a first gap region G1 between said first outer surface region B1 and said first inner cavity surface CS1. This method step further comprises transferring said fluidic polymer FP within said first gap region G1 from its fluidic state into a solid polymer SP with a solid state or less fluidic state than said fluidic polymer. This method step further comprises withdrawing said first outer surface region B1 of said heat exchanger block B from said partially filled first cavity portion C1 by moving said heat exchanger block B away from said first mould M1 , thereby leaving said moulded first housing portion W1 covering/engaging said first outer surface region B1 of said heat exchanger block B.

Fig. 5A is perspective view of said heat exchanger block B provided with said first housing portion W1 as result of the method step described in in the previous paragraph with respect to Fig. 4.

Fig. 5B is a side view of said heat exchanger block B provided with said first housing portion W1.

Fig. 5C is another perspective view of said heat exchanger block B provided with said first housing portion W1.

Analogously, there is provided a method step for providing said heat exchanger block B with a second housing portion W2 (not explicitly shown) This method step comprises inserting said second outer surface region B2 of said heat exchanger block B into said partially filled second cavity portion C2 by moving said heat exchanger block B towards said second mould M2, thereby displacing and spreading said fluidic polymer FP within a second gap region G2 between said second outer surface region B2 and said second inner cavity surface CS2. This method step further comprises transferring said fluidic polymer FP within said first gap region G2 from its fluidic state into a solid polymer SP with a solid state or less fluidic state than said fluidic polymer. This method step further comprises withdrawing said second outer surface region B2 of said heat exchanger block B from said partially filled second cavity portion C2 by moving said heat exchanger block B away from said second mould M2, thereby leaving said moulded second housing portion W2 covering/engaging said second outer surface region B2 of said heat exchanger block B.

Fig. 6A is a perspective view of a third mould M3 and a fourth mould M4 to be used in the method according to the embodiment. The third and fourth moulds M3 and M4 have a third cavity C3 and a fourth cavity C4, respectively with a third inner cavity surface CS3 and a fourth inner cavity surface CS4, respectively. In the exemplary embodiment, the heat exchanger block B and the housing H moulded to it are symmetrical with the third outer surface region B3 and the fourth outer surface region B4 being symmetrical to each other.

Fig. 6B shows the moulds M3 and M4 of Fig. 6A partially filled with a fluidic polymer FP.

In a manner similar to the first mould M1 being used to mould the first housing portion W1 to the first outer surface region B1 and similar to the second mould M2 being used to mould the second housing portion W2 to the second outer surface region B2, the third mould M3 is used to mould a third housing portion W3 to the third outer surface region B3 and the fourth mould M4 is used to mould a forth housing portion W4 to the forth outer surface region B4.

Fig. 7 is a perspective view of said heat exchanger block B provided with the four housing portions W1 , W2, W3 and W4. The first and second housing portions W1 and W2 are symmetrical to each other and the third and fourth housing portions W3 and W4 are symmetrical and/or identical and/or congruent to each other.

Fig. 8 is a perspective view of a fifth mould M5 and a sixth mould M6 to be used in the method according to the embodiment. The fifth and sixth moulds M5 and M6 have a fifth cavity C5 and a sixth cavity C6, respectively with a fifth inner cavity surface CS5 and a sixth inner cavity surface CS6, respectively. In the exemplary embodiment, the heat exchanger block B and the housing H moulded to it are symmetrical with the fifth outer surface region B5 and the sixth outer surface region B6 being symmetrical and/or identical and/or congruent to each other.

Fig. 9 shows a method step for providing said heat exchanger block B with a fifth housing portion W5. This method step comprises inserting said fifth outer surface region B5 of said heat exchanger block B into said partially filled fifth cavity portion C5 by moving said heat exchanger block B towards said fifth mould M5, thereby displacing and spreading said fluidic polymer FP within a fifth gap region G5 between said fifth outer surface region B5 and said fifth inner cavity surface CS5. This method step further comprises transferring said fluidic polymer FP within said fifth gap region G5 from its fluidic state into a solid polymer SP with a solid state or less fluidic state than said fluidic polymer. This method step further comprises withdrawing said fifth outer surface region B5 of said heat exchanger block B from said partially filled fifth cavity portion C5 by moving said heat exchanger block B away from said fifth mould M5, thereby leaving said moulded fifth housing portion W5 covering/engaging said fifth outer surface region B5 of said heat exchanger block B.

Fig. 10A is perspective view of said heat exchanger block B provided with said fifth housing portion W5 as result of the method step described in in the previous paragraph with respect to Fig. 9.

Fig. 10B is a side view of said heat exchanger block B provided with said housing portion W5.

Analogously, there is provided a method step for providing said heat exchanger block B with a sixth housing portion W6 (not explicitly shown) This method step comprises inserting said sixth outer surface region B6 of said heat exchanger block B into said partially filled sixth cavity portion C6 by moving said heat exchanger block B towards said sixth mould M6, thereby displacing and spreading said fluidic polymer FP within a sixth gap region G6 between said sixth outer surface region B6 and said sixth inner cavity surface CS6. This method step further comprises transferring said fluidic polymer FP within said sixth gap region G6 from its fluidic state into a solid polymer SP with a solid state or less fluidic state than said fluidic polymer. This method step further comprises withdrawing said sixth outer surface region B6 of said heat exchanger block B from said partially filled sixth cavity portion C6 by moving said heat exchanger block B away from said sixth mould M6, thereby leaving said moulded sixth housing portion W6 covering/engaging said sixth outer surface region B6 of said heat exchanger block B.

List of reference signs

B heat exchanger block

H housing of the heat exchanger block

AFP1 first air flow passages

AFP2 second air flow passages

AF1 first air flow

AF2 second air flow

011 first inlet opening region

012 first outlet opening region

021 second inlet opening region 022 second outlet opening region B1 first outer surface region

B2 second outer surface region B3 third outer surface region

B4 fourth outer surface region

B5 fifth outer surface region

B6 sixth outer surface region

W1 first housing portion

WS1 first outer housing surface

W2 second housing portion

WS2 second outer housing surface W3 third housing portion

WS3 third outer housing surface

W4 fourth housing portion

WS4 fourth outer housing surface W5 fifth housing portion

WS5 fifth outer housing surface

W6 sixth housing portion

WS6 sixth outer housing surface

H11 first inlet opening

H12 first outlet opening

H21 second inlet opening

H22 second outlet opening FP fluidic polymer in a fluidic state

SP solid polymer in a solid state or less fluidic state

M1 first mould

C1 first cavity, first recess

CS1 first inner cavity surface

G1 first gap region (between B1 and CS1)

M2 second mould

C2 second cavity, second recess

CS2 second inner cavity surface

G2 second gap region (between B2 and CS2)

M3 third mould

C3 third cavity, third recess

CS3 third inner cavity surface

G3 third gap region (between B3 and CS3)

M4 fourth mould

C4 fourth cavity, fourth recess

CS4 fourth inner cavity surface

G4 fourth gap region (between B4 and CS4)

M5 fifth mould

C5 fifth cavity, fifth recess

CS5 fifth inner cavity surface

G5 fifth gap region (between B5 and CS5)

M6 sixth mould

C6 sixth cavity, sixth recess

CS6 sixth inner cavity surface

G6 sixth gap region (between B6 and CS6)