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Maximum flow setting

A technology with a maximum flow rate, applied in valve devices, flow control, mechanical equipment, etc., can solve problems such as power waste and wear and tear

Active Publication Date: 2022-01-18
SIEMENS SWITZERLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive flow through the heat exchanger of the HVAC loop leads to wasted electricity
Excessive flow through the heat exchanger of the HVAC circuit also causes additional wear on the moving parts of the valve

Method used

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Examples

Experimental program
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Embodiment Construction

[0028] figure 1A valve ( 1 ) is shown with an inlet ( 2 ) and an outlet ( 3 ). A fluid path (4) extends between the inlet (2) and the outlet (3). A valve member (6) such as a conical valve member and / or a spherical valve member is located in the fluid path. The valve member (6) is movable to a closed position enclosing the fluid path (4). The valve member (6) is also moveable to an open position that opens the fluid path (4).

[0029] An actuator (7), such as a valve actuator, is coupled, preferably mechanically, to the valve member (6). The actuator (7) may be coupled to the valve member (6) via a valve stem. The actuator (7) is in operative communication with a controller (8), such as a valve controller (8) and / or a local controller (8). The controller (8) is ideally connected to the actuator (7) via a digital to analog converter. A digital-to-analog converter generates an analog output signal for the actuator (7) from the digital output signal of the controller (8). ...

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PUM

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Abstract

The present disclosure teaches a method and apparatus for estimating maximum flow through a heat exchanger. More specifically, the present disclosure focuses on maximum flow through a heat exchanger of a device for heating, ventilation and / or air conditioning. A method of limiting flow through a valve (1) comprises: reading a time series of signals from a flow sensor (5a, 5b); producing a time series of flow rates from the time series of signals; producing an averaged series of values; producing a first bounded series of values by replacing values that are below a lower threshold (13) with the lower threshold (13); producing a second bounded series of values by replacing values that exceed an upper threshold (15) with values that equal the upper threshold (15); producing a maximum flow rate by applying a moving maximum filter (17) to the second bounded series; reading a set point signal (9); limiting the set point signal (9) to the maximum flow rate; producing an actuation signal from the limited set point signal; transmitting the actuation signal to an actuator (7).

Description

technical field [0001] The present disclosure teaches a method and apparatus for estimating maximum flow through a heat exchanger. More specifically, the present disclosure focuses on maximum flow through a heat exchanger of a device for heating, ventilation and / or air conditioning. Background technique [0002] Installations for heating, ventilation and / or air conditioning (HVAC) typically consist of multiple circuits. Each circuit consists of one or several terminal units to provide heating and / or cooling to various parts of the building. End devices can be heating and / or cooling devices. A terminal device of a domestic heating system may be a heat exchanger, such as a radiator. [0003] Factors such as pipe cross-sections, valve characteristics, positioning of terminal units within the distribution network, etc. affect the flow through the heat exchangers of the HVAC installation. These factors create a hydraulic resistance that varies throughout the system. Hydrauli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/54F24F11/64F24F11/84F24F11/56F24F11/61
CPCF24F11/54F24F11/64F24F11/84F24F11/56F24F11/61G05D7/0635G01F1/00G01F1/3209G01F1/66G01F15/005F24F11/63F24F11/88H04W4/80F16K37/0041
Inventor K-H·佩特里
Owner SIEMENS SWITZERLAND