Bean Roasting Pot Layout With Direct Hot-Air Heating
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Solution Overview
Problem
Conventional bean roasting machines require large and expensive components due to long, bent ducts causing heat and windage loss, necessitate complex maintenance, and are prone to safety hazards from chaff accumulation and fire risks, with inefficient bean cooling leading to prolonged roasting times and equipment contamination.
Innovation Solution
A bean roasting machine design where hot air is jetted from the central bottom of a cone-shaped roasting pot obliquely, with direct connections between the heater device and roasting pot, a cyclone for chaff separation, and a bean collection mechanism that allows for efficient cooling and compact layout, reducing heat and windage loss, and enabling easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional hot air-type roasting machines use large-capacity roasting blowers and heater devices to compensate for heat and windage loss in long ducts, then sufficient roasting performance is achieved, but the machine becomes large in size, expensive in cost, and noisy
Solution Approach 1:
The patent divides the air circulation system into two separate pathways: a short internal circulation path for hot air between the heater and roasting pot, and a separate exhaust path for used air. This segmentation eliminates the need for long ducts connecting all components, reducing both heat loss and windage loss while allowing smaller blower and heater devices
Solution Approach 2:
The patent repositions the air intake inlet of the heater device from a conventional location to the side surface of the heater, enabling direct connection to the blowing port of the roasting blower. This dimensional rearrangement creates a compact layout where the roasting blower can be disposed above the heater device, eliminating long horizontal duct connections and reducing energy loss
2Reliability
If the chaff collection duct is connected near the center of the top cover of the roasting pot, then chaff can be collected, but the overall height of the roasting machine increases and the top cover cannot be easily removed for cleaning
Solution Approach 1:
The patent extracts the chaff collection function from the top cover area and relocates it to the side surface of the roasting pot. The chaff collection duct is now connected to an annular edge portion on the side wall, allowing the top cover to be freely removable for cleaning while maintaining effective chaff collection through the side-connected duct
3Ease of operation
If the chaff collection box is disposed at a low position for easy operation, then accessibility is improved, but the flexible pipe becomes long and chaff accumulates in bent portions, causing windage loss and fire risk
Solution Approach 1:
Instead of collecting chaff at the top and transporting it downward through long ducts, the patent inverts the approach by collecting chaff at the side level through a short duct connection. The chaff collection box is positioned to receive chaff directly from the side-connected duct, eliminating long vertical or bent pipe sections where chaff would accumulate and cause windage loss or fire hazards
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 results in a smaller, less noisy, and safer roasting machine with reduced power consumption, efficient bean cooling, and improved operability, allowing for quick bean collection and continuous roasting operations.
Implementation Method 1
a heater device (40) as a heat source for roasting the beans (23)
Implementation Method 2
a roasting blower (37) that sends high-pressure air into the heater device (40) and sends the air becoming high temperature by the heater device (40) into the roasting pot (23)
Implementation Method 3
a cyclone (42) that takes in the exhaust air through the chaff collection duct (28) and separates the chaff from the exhaust air
Implementation Method 4
a punched metal member (56) with numerous holes, which are small enough that the beans cannot pass through, are formed on a bottom surface of the bean storage box (52)
Data Source
AI summary
A bean roasting machine includes a heater device as a heat source for roasting; and a roasting blower that sends high-pressure air into the heater device and sends the air becoming a high temperature by the heater device into the roasting pot, in which the heater device is disposed directly below the central bottom of the roasting pot, an air blowing outlet of the heater device opens upward and is directly connected to an air intake inlet formed in the central bottom of the roasting pot, and the air intake inlet of the heater device is located on a side surface of the heater device and is directly connected to a blowing port of the roasting blower. Thus, the central bottom of the roasting pot is close proximity to the heater device, and the heater device and the roasting pot are directly connected to each other.