Compressor and refrigeration cycle device apparatus
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Solution Overview
Problem
Existing compressor technologies face reliability issues due to delayed temperature measurement of discharged gas, leading to potential over-compression and high temperatures, which can damage the compressor and reduce its efficiency.
Innovation Solution
A compressor design incorporating a first temperature sensor directly measuring refrigerant temperature and a second temperature sensor measuring the surface temperature of the discharge tube, along with a guide plate to reduce channel cross-sectional area, allowing for accurate and immediate temperature measurement of the refrigerant, thereby enhancing responsiveness and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the temperature probe is disposed at a position downstream of the compressor body where pulsation is attenuated, then the temperature measurement stability is improved, but the response time of temperature measurement is delayed
Solution Approach 1:
The patent divides the temperature measurement function into two separate sensors: a first temperature sensor for immediate temperature detection near the discharge port, and a second temperature sensor for stable temperature measurement downstream. This segmentation allows each sensor to optimize for its specific measurement location, resolving the contradiction between response speed and stability.
Solution Approach 2:
The patent introduces an intermediary calculation process that combines measurements from both temperature sensors to estimate the discharge temperature. This intermediary approach allows the system to leverage the immediate response of the first sensor while compensating for its instability using the second sensor's stable measurement.
2Device complexity
If the temperature sensor measures the temperature of the pipe surface instead of the refrigerant directly, then the measurement system complexity is reduced, but the measurement precision is decreased
Solution Approach 1:
The patent uses the pipe surface temperature as an intermediary measurement that can be easily obtained, then combines it with the direct refrigerant temperature measurement from the first sensor through calculation to achieve accurate discharge temperature estimation without requiring the second sensor to be in direct contact with the refrigerant.
3Reliability
If the first temperature sensor is permanently installed inside the casing, then the measurement reliability is improved, but the maintenance difficulty increases
Solution Approach 1:
The patent makes the installation configuration of the first temperature sensor dynamic by providing both a permanent installation option (penetrating the casing) and a temporary attachment option (magnet attachment). This allows the system to adapt between reliability-oriented permanent installation and maintenance-friendly temporary installation based on operational needs.
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 configuration enables precise temperature estimation of the refrigerant immediately after discharge, reducing the risk of over-compression and high temperatures, improving compressor reliability and efficiency while allowing for easier maintenance and cost-effective manufacturing.
Implementation Method 1
The temperature sensing portion directly measures the temperature of the refrigerant
Implementation Method 2
The second temperature sensor is disposed at a different position from the first temperature sensor and measures the temperature of one of the surface of the discharge tube
Implementation Method 3
a guide plate that is disposed inside the casing and reduces a channel cross-sectional area of the refrigerant channel
Data Source
AI summary
A compressor includes a casing, compression mechanism disposed inside the casing, a discharge tube, a first temperature sensor, and a second temperature sensor. The compression mechanism compresses a sucked refrigerant, and discharges the compressed refrigerant to a refrigerant channel formed in an inner space of the casing. The compressed refrigerant flows from the inner space of the casing to an outside through the discharge tube. The first temperature sensor includes a temperature sensing portion disposed in the refrigerant channel, and directly measuring a temperature of the refrigerant. The second temperature sensor is disposed at a different position from the first temperature sensor. The second temperature sensor measures a temperature of one of a surface of the discharge tube, an inner space of the discharge tube, and a surface of the casing.