Vehicle heater
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Solution Overview
Problem
Existing vehicle heaters lack improved heat transfer capacity, leading to inefficient heating of vehicle interiors.
Innovation Solution
A vehicle heater design featuring a heat exchanger housing with heat transfer ribs that have a varying radial edge distance from the outlet front wall, creating nonuniform pressure loss and enhancing heat transfer interaction, combined with a cylindrical circumferential wall and conically tapering outlet front wall configuration to optimize air flow and heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat exchanger housing with uniform heat transfer ribs is used, then manufacturing is simple, but heat transfer capacity is insufficient
Solution Approach 1:
The patent applies local quality by varying the distance of radial edges from the outlet front wall area across different regions of the heat transfer ribs. Specifically, the distance increases from radially outward to radially inward in at least some areas, creating zones with different pressure loss characteristics. This localized variation optimizes heat transfer capacity in specific regions without requiring complete structural redesign, thus improving thermal performance while maintaining reasonable manufacturing complexity.
2Temperature
If heat transfer ribs with varying radial edge distance are implemented, then heat transfer efficiency increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements parameter changes by systematically varying the radial edge distance parameter across different regions of the heat transfer ribs. The distance increases from radially outward to radially inward, creating a controlled gradient that optimizes pressure loss distribution. This parameter variation is applied in a structured manner across multiple ribs, allowing for optimized heat transfer efficiency while maintaining manufacturability through consistent geometric progression patterns.
3Productivity
If conically tapering outlet front wall configuration is used, then air flow distribution is optimized, but device complexity increases
Solution Approach 1:
The patent applies spheroidality by implementing a conically tapering configuration in the outlet front wall area. This curved, tapered geometry replaces a simple cylindrical outlet, creating a gradual transition that optimizes air flow distribution from the combustion chamber through the heat exchanger. The conical tapering smooths flow paths and reduces turbulence, improving overall air flow efficiency while adding only moderate geometric complexity to the housing structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves enhanced heat transfer efficiency by forcing air to flow in contact with the heat exchanger housing, increasing the transfer of heat from combustion exhaust gases to the air, thus improving the heating capacity of the vehicle heater.
Implementation Method 1
a heat exchanger area with a heat exchanger housing, which is elongated in the direction of a housing longitudinal axis and around which air flowing in the air flow space can flow on an outer side
Implementation Method 2
A nonuniform pressure loss of the air flowing in the air flow space is generated in the axial end area of the heat exchanger area due to the varying, especially diverging configuration of the radial edge in relation to the outlet front wall area
Implementation Method 3
a burner chamber assembly unit to be fed with combustion air and fuel in the heater housing
Data Source
AI summary
A vehicle heater housing (46) has an inlet area (49), an outlet area (51) and an air flow space (47) for air to be heated with a burner chamber assembly unit (30), to be fed with combustion air and fuel. A heat exchanger area (11), including a heat exchanger housing (12), is elongated in the direction of a housing longitudinal axis (L) with an outer side (24) around which air flowing in the air flow space flows. Heat transfer ribs are on a side of the heat exchanger housing. The heater housing has a housing circumferential wall (56) and an outlet front wall area (58). The heat transfer ribs have a longitudinal edge (64) extending along the housing circumferential wall and a radial edge extending along the outlet front wall area. A distance of the radial edge from the outlet front wall area changes from radially outwards to radially inwards.