Food Warming Heat Lamp With Sensor-Based Zone Activation
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Solution Overview
Problem
Existing food warming equipment in catering environments wastes significant energy as heat sources remain on for extended periods, even when food is not present, and existing solutions are not suitable for kitchen environments or are not energy-efficient.
Innovation Solution
A food presence sensor system is integrated into food warming equipment to activate heat sources only when food is present, using a sensor and circuitry to detect the presence of items beneath each heat source, allowing for energy-saving operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat sources remain on for extended periods to keep food warm, then food temperature is maintained, but energy consumption increases significantly
Solution Approach 1:
The patent divides the food warming system into individual independently controllable heating zones, each with its own sensor and control circuitry. This allows each heating element to be controlled separately based on the presence of food in its specific zone, rather than having all heating elements operate simultaneously. The segmentation enables precise energy management where only the necessary heating zones are activated.
Solution Approach 2:
The system incorporates automatic sensor-based detection that eliminates the need for manual monitoring or switching. Each heating zone automatically detects the presence of food through optical or proximity sensors and activates or deactivates its heating element accordingly. This self-service mechanism ensures energy is only consumed when food is present to be warmed, without requiring human intervention.
2Ease of operation
If all heat sources are operated by a single switch, then operation is simplified, but energy waste occurs when only some areas are in use
Solution Approach 1:
The control system is segmented into multiple independent zones, each with its own switching mechanism controlled by local sensors. This allows individual zones to be activated or deactivated based on actual usage needs, preventing energy waste in unused areas while maintaining the ability to operate multiple zones simultaneously if needed.
Solution Approach 2:
Each heating zone is equipped with feedback mechanisms through sensors that detect the presence or absence of food. This feedback information is used by the control circuitry to automatically adjust the operation of each heating element, ensuring that energy is only consumed when and where food is present, thereby eliminating the energy waste associated with blanket operation of all heat sources.
3Extent of automation
If motion sensors are used to detect food presence, then automatic control is achieved, but false detection occurs due to kitchen activity
Solution Approach 1:
Instead of using broad-area motion sensors that detect general kitchen activity, the patent employs localized detection methods focused specifically on the food preparation area. Optical sensors or proximity sensors are positioned to detect only the presence of food or cookware in the immediate vicinity of each heating zone, ignoring motion in other parts of the kitchen. This localized approach ensures accurate detection without false positives from unrelated kitchen activity.
Solution Approach 2:
The system uses intermediary detection mechanisms such as optical sensors that detect specific characteristics of food or cookware (reflected light, thermal signature, or proximity) rather than relying on general motion detection. This intermediary approach allows the system to distinguish between relevant objects (food to be heated) and irrelevant motion (kitchen staff moving equipment), thereby improving detection reliability while maintaining automation.
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 system effectively reduces energy consumption by ensuring heat sources are activated only when needed, providing an energy-efficient and cost-effective solution for maintaining food warmth.
Implementation Method 1
Overhead food warmers work by the food being placed under a thermal radiation source, typically a heating element or a strong light such as a halogen lamp.
Implementation Method 2
A food presence sensor system is integrated into food warming equipment to activate heat sources only when food is present
Data Source
AI summary
A novel form of food heating lamp is disclosed with built-in sensors for auto-detection of food. This exemplary innovation provides sensors capable of measuring distance and can be added or replaced to be readily used in food warming equipment already in the field to allow for this energy saving capability to be widely enabled at low cost. The associated application allows easy control, reminders, notifications and reporting on user request.