Single Knob Temperature Control for Multi-Compartment Cooling Devices
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Solution Overview
Problem
Existing cooling devices have thermostat knobs that occupy space within compartments, leading to reduced volume and potential damage, and energy inefficiency due to rapid temperature increase and accidental adjustments.
Innovation Solution
A single compartmentalized knob with push-in pop-out adjustment members allows independent temperature control of multiple compartments, featuring a compact design and locking mechanisms to prevent accidental adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If thermostat knobs are provided in each compartment for temperature adjustment, then temperature control for each compartment is enabled, but the compartment volume is reduced due to space occupation
Solution Approach 1:
The patent combines multiple thermostat adjustment functions into a single knob structure. The first adjustment member controls the first compartment temperature while the second adjustment member controls the second compartment temperature, both integrated into one knob assembly that occupies minimal space in one compartment only.
Solution Approach 2:
The single knob structure serves multiple functions: it can adjust temperature for the first compartment via the first adjustment member, adjust temperature for the second compartment via the second adjustment member, and lock both adjustment members in position. This multi-functional design eliminates the need for separate knobs in each compartment.
2Ease of operation
If thermostat knobs are placed within compartments, then temperature adjustment is enabled, but the knobs are vulnerable to damage from food storage vessels and accidental adjustments
Solution Approach 1:
The locking means are designed to prevent accidental adjustments before they can occur. When the locking means engage with the locking protrusions on the adjustment members, they preemptively block any unintended rotation or movement, protecting against both accidental touches and potential damage from food storage vessels.
Solution Approach 2:
The adjustment members can transition between locked and unlocked states dynamically. During normal operation, the locking means engage to prevent movement. When intentional adjustment is needed, the user can unlock the adjustment member, rotate it to the desired position, and then re-lock it, providing controlled flexibility.
3Ease of operation
If temperature adjustment is performed in cold compartments, then temperature control is achieved, but energy consumption increases due to rapid temperature rise from heat transfer
Solution Approach 1:
The patent places the knob structure in the first compartment (which has higher temperature) as an intermediary location to control both compartments. This allows users to perform temperature adjustments in a warmer environment, reducing the energy loss associated with opening cold compartment doors and minimizing heat transfer-induced temperature fluctuations.
Data Source
Figure 1
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Figure 4~5
AI summary
The present invention relates to a cooling device (1) comprising a first compartment (2) wherein the foodstuffs to be cooled are stored; a second compartment (3) which is kept at a temperature different than that of the first compartment (2); at least one door (4) which provides access into the first compartment (2) and the second compartment (3); and at least knob (5) which enables the adjustment of the temperature of the first compartment (2) and the second compartment (3).