초록 ▼

A closed loop control apparatus utilizes a cooling effect sensor to measure the cooling capacity of a fluid in a supply conduit connected to one or more thermal loads. The sensor includes an electrical heater that is regulated to heat a sampled portion of the cooling fluid at a known rate, and a tem

A closed loop control apparatus utilizes a cooling effect sensor to measure the cooling capacity of a fluid in a supply conduit connected to one or more thermal loads. The sensor includes an electrical heater that is regulated to heat a sampled portion of the cooling fluid at a known rate, and a temperature sensor positioned downstream of the heater to measure the temperature of the heated fluid and thereby determine the cooling effect or capacity of the fluid. A control signal developed by the temperature sensor is fed back to a flow modulating valve that adjusts the flow of cooling fluid to the thermal loads.

대표청구항 ▼

Apparatus for controlling the flow of a temperature regulating fluid through a supply conduit to a thermal load comprising: flow modulating means connected with the supply conduit and being adjustable to modulate the flow of temperature regulating fluid through the supply conduit to the thermal load

Apparatus for controlling the flow of a temperature regulating fluid through a supply conduit to a thermal load comprising: flow modulating means connected with the supply conduit and being adjustable to modulate the flow of temperature regulating fluid through the supply conduit to the thermal load; thermal load simulation means having a sampling conduit including a heat exchanging means connected with the supply conduit between the flow modulating means and the thermal load for sampling the temperature regulating fluid and for exchanging heat with a sampled portion of the fluid transmitted through the conduit and thereby affecting the temperature of the sampled fluid, the conduit having an upstream end connected with the supply conduit and a downstream end from which the sampled fluid is discharged, the heat exchanging means being located in the conduit between the upstream and downstream ends; temperature sensing means positioned in the sampling conduit between the heat exchanging means and the discharge of the conduit at the downstream end for monitoring the downstream temperature of the sampled fluid affected by the thermal load simulating means downward of the connection with supply conduit and the heat exchanging means and providing a control signal representative of the downstream temperature and thermal effect of the fluid; and control means connected with the flow modulating means and responsive to the control signal from the temperature sensing means for modulating the flow of the temperature regulating fluid to the thermal load in accordance with the downstream temperature of the sampled fluid and the thermal effect of the regulating fluid.