Expansion Compressor Radial Suction Layout for Stable Cam Operation
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Solution Overview
Problem
In air conditioners, the high-pressure fluid exerts an axial impact force on the fan-shaped cam, leading to unstable operation, increased cam abrasion, and seal failure due to the complex structure of the expander, which complicates processing and reduces the reliability of air suction control.
Innovation Solution
The expansion compressor apparatus features a control cylinder with radial air suction and exhaust passages, a communication groove on the connecting shaft, and an expansion cylinder with a radial air suction passage, allowing high-pressure air to enter the control cylinder without axial impact on the expansion eccentric portion, enabling stable operation by sequencing through the control cylinder passages to initiate air suction in the expansion cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the expander suction hole is provided at the bottom of the lower bearing, then the structure is simple, but the high-pressure fluid exerts an upward impact force on the fan-shaped cam, causing axial movement of the crankshaft and unstable operation
Solution Approach 1:
The air suction passage is changed from a bottom-positioned hole to a radial passage on the side surface of the expander cylinder. This dimensional repositioning moves the air suction interface away from the axial impact zone, eliminating the harmful upward force on the fan-shaped cam while maintaining structural simplicity.
Solution Approach 2:
The air suction function is extracted from the bottom bearing area and relocated to a dedicated radial air suction passage on the expander cylinder side surface. This separation removes the conflicting requirement of bottom-positioned air suction that caused axial impact, allowing independent optimization of both air suction and bearing functions.
2Ease of operation
If the fan-shaped cam structure is used for air suction control, then the device can operate, but the cam experiences increased abrasion over time, enlarging the clearance and causing seal failure
Solution Approach 1:
The mechanical fan-shaped cam air suction control mechanism is replaced with a radial air suction passage system controlled by a sliding valve. This substitution eliminates the sliding friction and wear associated with the cam structure, replacing it with a seal-based control mechanism that maintains reliability over time.
Solution Approach 2:
The air suction control is transitioned from direct mechanical cam action to a pneumatic control system using a sliding valve that opens and closes the radial air suction passage. This pneumatic approach reduces mechanical contact and wear, improving long-term reliability and seal integrity.
3Ease of manufacture
If the expander and compressor are connected via shaft with traditional configuration, then the system can be assembled, but the structure is complicated and processing is difficult
Solution Approach 1:
The expander cylinder and control cylinder are merged into a single integrated structure with shared walls and combined air suction/exhaust passages. This merging reduces the number of separate components and simplifies processing while maintaining the necessary functional separation through internal partitioning.
Solution Approach 2:
The expander cylinder structure is designed to serve multiple functions: it acts as both the expander housing and the control cylinder, with integrated air suction and exhaust passages. This multi-functionality reduces overall structural complexity and simplifies manufacturing by eliminating the need for separate control cylinder components.
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 design stabilizes the expansion compressor operation, enhances the reliability of air suction control, and reduces cam wear by preventing axial impacts, ensuring efficient air suction and maintaining seal integrity.
Implementation Method 1
a communication groove being provided at a position, corresponding to the control cylinder, on the connecting shaft, and the communication groove rotating along with the connecting shaft to enable the control cylinder air suction passage and the control cylinder air exhaust passage to be communicated or separated
Implementation Method 2
high-pressure air to enter the control cylinder without axial impact on the expansion eccentric portion
Implementation Method 3
the expansion roller eccentrically rotates in the first inner hole, an expansion cylinder air exhaust passage communicated with an air exhaust cavity of the expansion cylinder is provided on the expansion cylinder
Data Source
AI summary
The invention discloses an expansion compressor apparatus and an air conditioner having the same, wherein the expansion compressor apparatus includes: an expansion cylinder, a compression cylinder, and a connecting shaft, an expansion cylinder air suction passage communicated with an air suction cavity of the expansion cylinder being provided on the expansion cylinder, the expansion compressor apparatus further includes: a control cylinder, the control cylinder being provided with a control cylinder air suction passage and a control cylinder air exhaust passage, both the control cylinder air suction passage and the control cylinder air exhaust passage being provided in a radial direction of the control cylinder, and a communication passage being provided between the control cylinder air exhaust passage and the expansion cylinder air suction passage. The apparatus effectively solves the problem in the prior art that a high-pressure fluid exerts an impact force in an axial direction on a fan-shaped cam.