Heating systems – Heat and power plants – Vehicle
Patent
1997-02-12
1998-01-13
Bennett, Henry A.
Heating systems
Heat and power plants
Vehicle
237 123C, 126 56, 126 57, B60H 102
Patent
active
057070083
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
The present invention pertains to a heater, especially for vehicles, with, among other things, a pot-shaped, double-jacketed heat exchanger, into which a burner for the fuel to be burned extends coaxially to the axis of the heat exchanger, with a fan, which is especially a side-channel fan, for feeding combustion air into a combustion chamber of the burner, with a glow plug swept by a small partial flow of combustion air for igniting the fuel, and optionally with a flame sensor within the combustion chamber of the burner, in which heater the axes of the heat exchanger and of the fan intersect each other approximately at right angles.
SUMMARY AND OBJECTS OF THE INVENTION
It is an object of the invention to that the structural volume of such a device, which has been known from practice, shall be reduced, and manufacture of the device shall become more efficient. However, to make it possible to introduce the combustion air with a swift into the combustion chamber of the burner of the heat exchanger in the prior-art devices, a bladed distributor is provided axially in front of the combustion chamber of the burner. This implies an expensive design and leads, in addition, to a relatively large structural volume. Due to the radial extension of the glow plug for igniting the fuel to be fed into the burner of the heat exchanger, which has been common in the prior-art burners, the complicated design of the device is made additionally larger.
One important starting point for a solution to the above-mentioned problem consists of designing the device in such a way that the axes of the heat exchanger and of the fan of this type intersect each other approximately at right angles. This creates the prerequisite for an efficient and consequently low-cost and compact design of the heater of this type. It is thus possible, in particular, to achieve an especially considerable reduction in the number of individual parts needed to manufacture the heater, and the few remaining parts can be integrated into an extremely compact unit.
To accomplish this goal, the present invention provides for closing the central opening of the heat exchanger by a one-part angle flange containing a first leg forming a partial area of the fan and a second leg extending approximately at right angles thereto. This one-part angle flange practically assumes the function of a housing part, into which especially the fan can be integrated. The first leg of this angle flange extends in a plane extending approximately in parallel to the axis of the heat exchanger, and the second leg extends in a plane directed at right angles thereto. The second leg covers the opening of the heat exchanger with the burner located in it.
If the fan is designed as a side channel fan with a side channel divided axially into two halves, the half with the air inlet and outlet is integrated into the first leg of the angle flange directed in parallel to the axis of the heat exchanger.
Due to the closing of the heat exchanger opening with the second leg of the angle flange, in the first leg of which, extending at right angles thereto, a side channel fan is integrated, the combustion air can be introduced into the open front side of a tubularly designed combustion chamber in a swirled form with an extremely simple design. Only an air feed channel leading radially tangentially to the front side of the combustion chamber is to be integrated for this purpose in the open form into the front side of the second leg of the angle flange, which latter front side covers the heat exchanger opening. This channel is in direct connection with the outlet of the side channel of the fan arranged in the same angle flange. The air feed channel is closed on the circumference within the second leg of the angle flange when the angle flange is placed on the opening of the heat exchanger in such a way that it is covered by the heat exchanger and/or the combustion chamber.
In the design according to the present invention, the glow plug can be advantageously mounted in
Brenner Dirk
Eppler Hermann
Sigle Monika
Steiner Peter
Bennett Henry A.
Boles Derek S.
J. Eberspacher GmbH & Co.
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