Liquid CO2 Pump Head Cooling via Integrated Refrigerant Channels
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Solution Overview
Problem
The maintenance efficiency of delivery pumps in supercritical fluid chromatographs is hindered by the need to disassemble and reattach heat exchange blocks and cooling devices during maintenance, which complicates the process and reduces efficiency.
Innovation Solution
A refrigerant channel and circulation system that cools the pump head without a heat exchange block, using a temperature sensor to adjust the refrigerant flow rate and maintain the pump head temperature, facilitating easier maintenance by eliminating the need for attached cooling devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat exchange block with attached cooling devices is used to cool the pump head, then the pump head temperature can be controlled, but maintenance work becomes complicated and less efficient
Solution Approach 1:
The cooling function is segmented from the pump head structure. Instead of having the heat exchange block integrated with the pump head, the invention uses a separate cooling device that circulates refrigerant through independent channels, allowing the pump head to be maintained without removing cooling components.
Solution Approach 2:
The cooling function is extracted from the pump head assembly. The heat exchange block is removed from the pump head and implemented as a separate cooling device with independent refrigerant circulation channels, enabling maintenance of the pump head without disassembling cooling components.
2Temperature
If multiple components (heat exchange block, cooling devices, pipes) are attached to the pump head, then cooling functionality is achieved, but the number of parts to be disassembled during maintenance increases
Solution Approach 1:
The cooling channels are merged into the pump head structure itself rather than being separate attached components. The refrigerant circulation channels are formed within the pump head body, integrating the cooling function into the main structure and eliminating the need for separate heat exchange blocks and cooling devices.
Solution Approach 2:
The pump head is designed to serve multiple functions: it houses the plunger mechanism for liquid carbon dioxide delivery and simultaneously contains integrated refrigerant circulation channels for cooling. This multi-functionality eliminates the need for separate cooling attachments.
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 simplifies maintenance by allowing the pump head to be cooled through a refrigerant channel, maintaining the temperature of the pump head regardless of ambient changes, thus enhancing maintenance efficiency and reducing the complexity of disassembly and reassembly processes.
Implementation Method 1
a refrigerant channel different from a liquid carbon dioxide channel passing through the pump chamber, a circulation channel for refrigerant including the refrigerant channel
Implementation Method 2
a temperature sensor for detecting an ambient temperature of the pump head or a temperature of the pump head
Implementation Method 3
a refrigerant pump control section for adjusting, based on a detection signal of the temperature sensor, a flow rate of the refrigerant pump so that liquid carbon dioxide flowing through the pump head is at a specific temperature
Data Source
AI summary
A liquid carbon dioxide delivery pump with a pump head including a pump chamber and a refrigerant channel different from a channel passing through the pump chamber, a circulation channel for refrigerant, a refrigerant pump arranged on the circulation channel, the refrigerant pump for causing the refrigerant to circulate through the circulation channel, and a cooling section arranged on the circulation channel, at a position away from the pump head, the cooling section being configured to cool the refrigerant passing through the circulation channel. The liquid carbon dioxide delivery pump further has a temperature sensor for detecting an ambient temperature of the pump head or a temperature of the pump head, and a refrigerant pump control section for adjusting, based on a detection signal of the temperature sensor, a flow rate of the refrigerant pump such that liquid carbon dioxide flowing through the pump head at a specific temperature.