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A pressurized system for the preparation and mixing of two or more component solutions comprising a cleaning solution to produce a prepared cleaning solution for use with various applicators in common use in the cleaning industry. The system is made up of a mobile frame for supporting a plurality of

A pressurized system for the preparation and mixing of two or more component solutions comprising a cleaning solution to produce a prepared cleaning solution for use with various applicators in common use in the cleaning industry. The system is made up of a mobile frame for supporting a plurality of pressurized tanks which are connected through feed lines to a mixing tee fitting to produce the output mixed cleaning solution. An inline heater can be optionally added in one or more of the feed lines to provide heat to the component solution before mixing, and an inline heater can be optionally added after mixing to heat the prepared solution. Pressure is supplied to the system by an air compressor directly connected to each of the pressurized tanks so that the same pressure is applied to all tanks. Pressure is maintained in the system when changing tanks by use of liquid disconnects between the feed lines and the output valves of the tanks, gas disconnects between the compressed air line and the input valves of the tanks, and quick disconnects at all points where solutions may be extracted from the system. This allows easy removal and exchange for any solution tank without disrupting the solution flow through the system and further eliminates the need to drain solution tanks and purge solution lines. The system is composed of inexpensive parts commonly found in industry and is used in both residential and commercial applications for cleaning carpet, upholstery, drapes, and other such textile surfaces.

대표청구항 ▼

A pressurized system for the preparation and mixing of two or more component solutions comprising a cleaning solution to produce a prepared cleaning solution for use with various applicators in common use in the cleaning industry. The system is made up of a mobile frame for supporting a plurality of

A pressurized system for the preparation and mixing of two or more component solutions comprising a cleaning solution to produce a prepared cleaning solution for use with various applicators in common use in the cleaning industry. The system is made up of a mobile frame for supporting a plurality of pressurized tanks which are connected through feed lines to a mixing tee fitting to produce the output mixed cleaning solution. An inline heater can be optionally added in one or more of the feed lines to provide heat to the component solution before mixing, and an inline heater can be optionally added after mixing to heat the prepared solution. Pressure is supplied to the system by an air compressor directly connected to each of the pressurized tanks so that the same pressure is applied to all tanks. Pressure is maintained in the system when changing tanks by use of liquid disconnects between the feed lines and the output valves of the tanks, gas disconnects between the compressed air line and the input valves of the tanks, and quick disconnects at all points where solutions may be extracted from the system. This allows easy removal and exchange for any solution tank without disrupting the solution flow through the system and further eliminates the need to drain solution tanks and purge solution lines. The system is composed of inexpensive parts commonly found in industry and is used in both residential and commercial applications for cleaning carpet, upholstery, drapes, and other such textile surfaces. per, measuring the airflow to calculate the average airflow, and based on the average airflow, recalculating the error. 2. A computer-readable medium having stored thereon computer-executable instructions for performing the method of claim 1. 3. The method of claim 1, wherein the predicted damper runtime is determined by dividing the error by a slope of a damper response curve. 4. The method of claim 3, further comprising: in response to moving the damper and calculating the average airflow, determining how long the damper was moved and calculating a new slope of the damper response curve; in response to determining that the damper was moved for less than a second minimum runtime, disregarding the new slope and using the previous slope to recalculate the error; in response to determining that the damper was moved for a duration within a predetermined runtime range, averaging the new slope with the previous slope and using the averaged slope to recalculate the error; and in response to determining that the damper was moved for longer than the predetermined runtime range, using the new slope to recalculate the error. 5. A computer-readable medium having stored thereon computer-executable instructions for performing the method of claim 4. 6. The method of claim 1, wherein moving the damper for the predicted damper runtime or until the airflow is measured to have crossed the airflow setpoint comprises: in response to determining that the predicted damper runtime is not greater than a second minimum runtime, moving the damper for the predicted runtime; and in response to determining that the predicted damper runtime is greater than the second minimum runtime, moving the damper until the airflow is measured to have crossed the airflow setpoint. 7. The method of claim 1, further comprising, in response to receiving the airflow setpoint indication, calculating a percent change between the airflow setpoint and a previous airflow setpoint; and in response to determining that the percent change is greater than a predetermined percent change, replacing the previous airflow setpoint with the airflow setpoint. 8. The method of claim 1, wherein the airflow setpoint is calculated using a digital PID control having a proportional term, an integral term and a derivative term, the digital PID control comprising: receiving a room temperature measurement and calculating a temperature error between the room temperature and a temperature setpoint; in response to determining that the temperature error is greater than a temperature threshold, calculating the airflow setpoint using a significantly increased or a significantly decreased PID output and accumulating the integral term; after the expiration of a time increment, re-measuring the room temperature and recalculating the temperature error; in response to determining that the temperature error is less than the temperature threshold, determining whether the temperature error is within a deadband of the temperature setpoint; in response to determining that the temperature error is within the deadband of the temperature setpoint, recalculating the PID output by updating the proportional term but not updating the integral term and calculating the airflow setpoint using the recalculated PID output; and in response to determining that the temperature error is not within the deadband of the temperature setpoint, recalculating the PID output by updating the proportional term and the integral term and calculating the airflow setpoint using the recalculated PID output. 9. A computer-readable medium having stored thereon computer-executable instructions for performing the method of claim 8. 10. The method of claim 8, wherein the significantly increased PID output is used in a cooling situation; and wherein the significantly increased PID output comprises one hundred percent. 11. The method of claim 8, wherein the significantly decreased PID output is used in a heating s ituation; and wherein the significantly increased PID output comprises zero percent. 12. A pressure independent Variable Air Volume (VAV) temperature control system comprising: a VAV box having an airflow control damper for controlling an airflow delivered to a room and an airflow sensor for measuring the airflow; a temperature sensor within the room for measuring a temperature of the room; and a micro-controller configured for executing computer-executable instructions for: receiving a room temperature measurement from the temperature sensor and using the temperature measurement to calculate an airflow setpoint, receiving an airflow measurement from the airflow sensor and calculating an error between the airflow setpoint and the airflow measurement, and until a new room temperature measurement is received from the temperature sensor and a new airflow setpoint is calculated, repeating the steps comprising: based on the error, predicting a damper runtime to move the damper in the VAV box to achieve the airflow setpoint, if the predicted damper runtime is less than a minimum runtime, not generating a signal for moving the damper and receiving airflow measurements from the airflow sensor to calculate an average airflow over a period of time, if the predicted damper runtime is not less than the minimum runtime, receiving airflow measurements from the airflow sensor while generating the signal for moving the damper for the predicted damper runtime or until one of the airflow measurements is determined to have crossed the airflow setpoint, in response to movement of the damper, receiving airflow measurements from the airflow sensor to calculate the average airflow, and based on the average airflow, recalculating the error. 13. The system of claim 12, wherein the predicted damper runtime is determined by dividing the error by a slope of a damper response curve. 14. The system of claim 13, wherein the micro-controller further executes computer-executable instructions comprising: in response to movement of the damper and calculation of the average airflow, determining how long the damper was moved and calculating a new slope of the damper response curve; in response to determining that the damper was moved for less than a second minimum runtime, disregarding the new slope and using the previous slope to recalculate the error; in response to determining that the damper was moved for a duration within a predetermined runtime range, averaging the new slope with the previous slope and using the averaged slope to recalculate the error; and in response to determining that the damper was moved for longer than the predetermined runtime range, using the new slope to recalculate the error. 15. The system of claim 12, wherein generating the signal for moving the damper for the predicted damper runtime or until the airflow is measured to have crossed the airflow setpoint comprises: in response to determining that the predicted damper runtime is not greater than a second minimum runtime, generating the signal for moving the damper for the predicted runtime; and in response to determining that the predicted damper runtime is greater than the second minimum runtime, generating the signal for moving the damper until the airflow is measured to have crossed the airflow setpoint. 16. The system of claim 12, wherein the micro-controller further executes computer-executable instructions comprising: in response to calculating the airflow setpoint, calculating a percent change between the airflow setpoint and a previous airflow setpoint; and in response to determining that the percent change is greater than a predetermined percent change, replacing the previous airflow setpoint with the airflow setpoint. 17. The system of claim 12, wherein the airflow setpoint is calculated using a digital PID control having a proportional term, an integral term and a derivative term, the digital PID control comprising computer-exe