Electronic controlled spiral valve capacity modulation for a portable screw compressor

Inactive Publication Date: 2021-04-01
SULLAIR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent proposes a portable screw compressor with an electronic controller that can manage the compressor's capacity, torque, and horsepower,, and independently control the displacement of the compressor to adjust to the needs of the application. The controller can also help improve the cold starting capability of the compressor and reduce the engine load and fuel consumption by quickly adapting to changes in capacity. Additionally, the compressor can be equipped with an electronically controlled spiral valve to modulate capacity and avoid shutdown caused by any detectable change in operating condition.

Problems solved by technology

However, the pneumatically actuated spiral valves require significant pressure differentials to achieve a full spiral valve stroke.
Thus, pneumatically actuated spiral valves may only provide coarse control of the pressure resulting in over capacity, under capacity, and inefficient energy use.
Also, the cold temperatures often encountered in the use of portable air compressors are problematic for pneumatic control systems.
The durometer of the rubber components increases as temperatures decrease and can cause leakage and will decrease the effort that the actuator provides.
Cold starting portable compressors can be an issue depending on the application.
Internal combustion (IC) engines do not have good cold starting capability, nor do they have good speed-up capabilities during cold start.

Method used

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  • Electronic controlled spiral valve capacity modulation for a portable screw compressor
  • Electronic controlled spiral valve capacity modulation for a portable screw compressor
  • Electronic controlled spiral valve capacity modulation for a portable screw compressor

Examples

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Embodiment Construction

[0023]The following detailed description provides further details of the figures and example implementations of the present application. Reference numerals and descriptions of redundant elements between figures are omitted for clarity. Terms used throughout the description are provided as examples and are not intended to be limiting. For example, the use of the term “automatic” may involve fully automatic or semi-automatic implementations involving user or operator control over certain aspects of the implementation, depending on the desired implementation of one of ordinary skill in the art practicing implementations of the present application. Further, sequential terminology, such as “first”, “second”, “third”, etc., may be used in the description and claims simply for labeling purposes and should not be limited to referring to described actions or items occurring in the described sequence. Actions or items may be ordered into a different sequence or may be performed in parallel or...

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Abstract

A portable screw compressor that includes a spiral valve configured to be driven by an actuator motor; and an electronic controller coupled to an engine of the portable screw compressor and to the actuator motor. The electronic controller can be configured to, for a compressor pressure of the portable screw compressor exceeding an upper bound of a nominal pressure range, drive the actuator motor to configure the spiral valve to open one or more ports; and for the compressor pressure of the portable screw compressor being lower than a lower bound of the nominal pressure range, drive the actuator motor to configure the spiral valve to close the one or more ports.

Description

BACKGROUNDField[0001]The present disclosure relates to a spiral valve and in particular to electronic controllers configured for spiral valve capacity modulation.Related Art[0002]Twin screw gas compressors may be known in the related art. In the related art, a screw compressor may include a compressor housing and a motor (for example, a permanent magnet rotor / stator motor) is used to drive one (e.g., a first compression screw) of the two compression screws. The second of the two compression screws may be mechanically coupled to the compression screw that is driven by the motor. The second compression screw may thus be driven by the first compression screw. In the related art, gas may be drawn into the compressor through an inlet, compressed between the two compression screws as they turn, and output through an outlet which is downstream of the gas inlet and the compression screws.[0003]In some related art, one or more bypass ports or valve openings may be formed in the compressor ho...

Claims

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Application Information

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IPC IPC(8): F04D15/00F04D3/02F04D13/02
CPCF04D15/0022F04D15/0077F04D13/02F04D3/02F04C18/16F04C28/14F04C28/28
InventorDODEN, RALPHBATDORFF, JONATHAN D.
OwnerSULLAIR CORP