Ice Compartment Air Damper for Bottom-Freezer Temperature Control
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Solution Overview
Problem
In bottom mount refrigerators, integrating an icemaking compartment within the fresh food compartment poses challenges due to temperature differences and logistical issues, such as transporting ice from the freezer compartment, which existing solutions like U.S. Pat. No. 6,735,959 face difficulties in efficient ice formation, storage, and practicality.
Innovation Solution
A modular icemaking compartment is integrated within the fresh food compartment of a bottom mount refrigerator, utilizing a cold air duct from the freezer compartment to maintain a temperature between 0° and 32° F, with an insulated and sealed front cover, and a control system that includes a variable speed fan and damper for efficient ice production and dispensing, allowing ice dispensing without opening the refrigerator door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an icemaking compartment is integrated within the fresh food compartment of a bottom mount refrigerator, then ice can be dispensed from the refrigerator compartment without opening the door, but the temperature control becomes more complex due to the need to maintain a temperature between 0° and 32° F. in the icemaking compartment while the fresh food compartment is normally about 40° F.
Solution Approach 1:
The refrigerator is divided into distinct thermal zones: the fresh food compartment (40° F.), the icemaking compartment (0°-32° F.), and the freezer compartment. Each zone has independent temperature control capabilities, allowing the icemaking compartment to maintain its specific temperature range without affecting the overall refrigerator structure.
Solution Approach 2:
A cold air duct system acts as an intermediary between the freezer compartment and the icemaking compartment, transporting cold air to maintain the required temperature in the icemaking compartment without direct thermal contact between the compartments.
2Productivity
If a modular icemaking compartment is used with insulated and sealed front cover, then ice formation efficiency is improved, but the device complexity increases due to additional insulation and sealing components
Solution Approach 1:
Insulation is applied specifically to the front cover of the icemaking compartment where it is most needed to maintain temperature during ice formation, rather than insulating the entire compartment. The sealing is focused at the front cover interface to prevent heat ingress during the critical ice making process.
3Measurement precision
If a control system with variable speed fan and damper is implemented, then precise temperature control in the icemaking compartment is achieved, but the number of components and system complexity increases
Solution Approach 1:
The fan speed is made variable rather than fixed, allowing the system to adjust air circulation dynamically based on the icemaking requirements. The damper provides dynamic control of cold air flow from the freezer compartment, enabling precise temperature regulation in the icemaking compartment.
Solution Approach 2:
The control system uses temperature sensing and feedback mechanisms to monitor the icemaking compartment temperature and adjust fan speed and damper position accordingly, maintaining the temperature between 0° and 32° F. through continuous regulation.
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 solution enables efficient and timely icemaking, enhances user convenience, energy efficiency, and aesthetic appeal by maintaining the icemaking compartment at optimal temperatures while minimizing complexity and components, allowing for precise control of ice production and storage.
Implementation Method 1
utilizing a cold air duct from the freezer compartment to maintain a temperature between 0° and 32° F
Implementation Method 2
an insulated and sealed front cover
Data Source
AI summary
An insulated icemaking compartment is provided in the fresh food compartment of a bottom mount refrigerator. The icemaking compartment may be integrally formed with the liner of the fresh food compartment, or alternatively, may be modular for installation anywhere in the fresh food compartment. A removable bin assembly with a front cover normally seals the icemaking compartment to maintain the temperature in the compartment. A cold air duct formed in the rear wall of the refrigerator supplies cold air from the freezer compartment to the icemaking compartment. A return air duct directs a portion of the air from the icemaking compartment back to the freezer compartment. An air vent with a damper in the icemaking compartment directs another portion of air into the fresh food compartment. A control system provides for controlling refrigerator functions in a manner that promotes energy efficiency, including movement of the damper between open and closed positions.