Processing Chip Heating Control for Cold-Start Network Devices
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Solution Overview
Problem
Network devices deployed in extremely low-ambient temperature environments face challenges with commercial-grade processing chips requiring minimum operating temperatures, leading to lengthy startup times and potential thermal shock when using high-capacity heaters, which also consume significant power and require costly upgrades.
Innovation Solution
A network device employing two heating elements with controlled power allocation to quickly heat the processing chip to operational temperature without affecting Power over Ethernet (PoE) functionality, allowing the use of commercial-grade chips without migrating to industrial-grade specifications, and efficiently managing power for both heating and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a high-capacity heater is used to rapidly heat the processing chip, then the startup time is reduced, but thermal shock may occur causing irrecoverable damage to the processing chip
Solution Approach 1:
The heating system is divided into two separate heating elements with different power capacities. The first heating element provides gentle initial heating, while the second heating element provides additional heating power only after the processing chip has acclimated to temperature changes, preventing thermal shock while reducing total startup time.
Solution Approach 2:
The first heating element is activated initially to gradually warm the processing chip before the second heating element is engaged. This preliminary heating action allows the processing chip to acclimate to temperature changes, preventing thermal shock when the higher power second heating element is subsequently activated.
2Loss of time
If a high-capacity heater is used to rapidly heat the processing chip, then the startup time is reduced, but the power consumption increases requiring substantial power source upgrades
Solution Approach 1:
The heating power requirement is segmented into two phases: initial gentle heating requiring lower power, and subsequent rapid heating requiring higher power. By using two heating elements with different power ratings activated at different times, the system achieves fast startup without requiring a continuously high-capacity power source.
Solution Approach 2:
The heating process is divided into periodic phases where the first heating element operates initially, then the second heating element is activated to provide additional heating power. This periodic activation pattern allows the power source to handle peak demands without requiring continuous high-capacity provisioning.
3Device complexity
If a single heater is used to heat the processing chip, then the device complexity is reduced, but the startup time increases significantly
Solution Approach 1:
Instead of using a single heater, the system employs two heating elements with distinct functions. The first heating element provides initial gentle heating, and the second heating element provides additional rapid heating power. This segmentation enables significantly reduced startup time while maintaining manageable system complexity through modular design.
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
Reduces startup time by tenfold and optimizes power utilization, enabling efficient heating and heat dissipation while preventing thermal shock, without the need for expensive upgrades or redesigns.
Implementation Method 1
A first amount of power is allocated to a first heating element to heat a processing chip
Implementation Method 2
A second amount of power is allocated to a second heating element to heat the processing chip
Implementation Method 3
efficient heating and heat dissipation
Implementation Method 4
efficient heating and heat dissipation
Data Source
AI summary
Examples discussed herein relate to managing power allocation for devices, such as network devices, with processing chip. In some examples, based on determining that a first temperature measurement of the processing chip does not satisfy an operating temperature threshold, the network device allocates power from a power source to a first heating element of the network device to heat the processing chip & allocates power from the power source to a second heating element of the network device to heat the processing chip. Based on determining that a second temperature measurement satisfies the operating temperature threshold, the network device allocates power from the power source to a set of power over ethernet ports of the network device & the first amount of power from the power source selectively to the first heating element to heat the processing chip.