Heating unit with bottom mounted blower unit
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Solution Overview
Problem
Existing heating units for high-pressure washers have inefficiencies, large assembly sizes, multiple weldment joints, and uneven cooling patterns, which can lead to user injury and increased material and production costs.
Innovation Solution
A heating unit design featuring a top-mounted burner element and a bottom-mounted blower unit with a center hole in the bottom plate, where cooling air spreads evenly around the tank before being directed through the burner, reducing uneven airflow and achieving more uniform cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If side mounted blowers are used in existing heating units, then the heating unit can be assembled with multiple weldment joints and larger parts, but the cooling becomes uneven and efficiency levels decrease
Solution Approach 1:
The blower is inverted from the conventional side-mounted position to a bottom-mounted position. This inversion fundamentally changes the airflow pattern, allowing air to be forced upward through the combustion chamber from below, which creates uniform cooling across the entire heating element surface area and eliminates the uneven cooling zones present in side-mounted designs.
Solution Approach 2:
The airflow direction is changed from a horizontal side-entry approach to a vertical bottom-to-top approach. This dimensional change in airflow trajectory allows the cooling air to penetrate and circulate through the combustion chamber more effectively, achieving uniform temperature distribution across the heating element and improving overall thermal efficiency.
2Ease of manufacture
If existing heating unit designs are used with large assembly sizes, then more materials and weldment joints are required, but this increases material costs and production complexity
Solution Approach 1:
The blower assembly is merged with the tank structure by directly mounting the blower to the bottom of the tank, eliminating the need for separate side-mounted blower housings and associated weldment joints. This integration reduces the total parts count and simplifies the assembly process while maintaining effective cooling functionality.
Solution Approach 2:
The bottom mounting plate serves multiple functions: it provides structural support for the tank, serves as the mounting surface for the blower assembly, and directs airflow into the combustion chamber. This multi-functionality reduces the need for separate components and simplifies the overall assembly structure.
3Productivity
If side air vented designs are used, then the heating unit can be constructed with conventional components, but efficiency levels remain low and cooling is non-uniform
Solution Approach 1:
The blower pre-cools the air before it enters the combustion chamber by forcing it through the cooling channels formed by the inner and outer tanks. This preliminary cooling action ensures that the air is at an optimal temperature for efficient combustion, improving heat transfer efficiency and reducing energy losses.
Solution Approach 2:
The bottom-mounted blower creates a continuous upward airflow through the combustion chamber, ensuring constant cooling and efficient heat transfer. This continuous airflow pattern maintains optimal combustion conditions and prevents energy losses associated with uneven or interrupted cooling patterns.
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
This design enhances cooling efficiency, reduces material and tooling needs, and minimizes the risk of user injury by ensuring a low surface temperature on the outer wrapping, resulting in a more compact and efficient heating unit.
Implementation Method 1
a blower unit disposed on the bottom end of the tank. The blower unit is configured to force a flow of air through the cooling chamber
Implementation Method 2
The flow of cooling air can be directed through an outlet at the top end of the tank. In this way, the flow of cooling air can be directed onto a user's hands and fingers to cool the same
Data Source
AI summary
A heating unit for heating a fluid includes a tank, a burner element, and a lower unit. The tank defines top and bottom ends and includes an outer wrap, an inner wrap, and a cooling chamber. The outer wrap extends along an axial centerline defined by the tank. The inner wrap is disposed within the outer wrap. The cooling chamber is defined in-part by and is disposed between the inner and outer wraps along a radial direction of the tank. The burner element is disposed on the top end of the tank. The blower unit is disposed on the bottom end of the tank and is in fluid communication with the burner element via the cooling chamber. An outlet of the blower unit is disposed along the axial centerline of the tank.