Fluid heating device
AssigneeKELK Ltd.
InventorKazuhiro Mimura
Life of this patent
Estimating the term…
Abstract
A fluid heating device includes: a tank to store a fluid; a pump to deliver the fluid stored in the tank; a heater to heat the delivered fluid to a predetermined temperature; a return pipe to return the heated fluid to the tank; a fluid supply valve to supply an unheated fluid into the tank; a fluid discharge valve to discharge the heated fluid from the tank; a temperature sensor to detect a temperature of the heated fluid; and a temperature controller to control an opening degree of each of the fluid supply valve and the fluid discharge valve to control the temperature of the fluid stored in the tank. The temperature controller includes: a discharge opening-degree controller-to control the opening degree of the fluid discharge valve; and a supply opening-degree controller to control the opening degree of the fluid supply valve.
Claims5
A fluid heating device comprising:
- a tank configured to store a fluid;
- a pump configured to remove the fluid stored in the tank;
- a heater configured to heat the removed fluid to a predetermined temperature;
- a return pipe configured to return the fluid heated by the heater to the tank;
- a fluid supply valve configured to supply an unheated fluid into the tank;
- a fluid discharge valve configured to discharge the heated fluid from the tank;
- a temperature sensor configured to detect a temperature of the heated fluid;
- and
- a temperature controller configured to control an opening degree of each of the fluid supply valve and the fluid discharge valve to thereby control the temperature of the heated fluid, the temperature controller being configured to:
- control the opening degree of the fluid discharge valve based on the temperature detected by the temperature sensor,
- control the opening degree of the fluid supply valve based on the temperature detected by the temperature sensor, and
- compare a first temperature setpoint of the heated fluid to a second temperature setpoint that is set after the first temperature setpoint has been set,
- wherein the temperature controller is configured to control the pump such that the pump circulates the fluid at a minimum pumping flow rate based on the second temperature setpoint being less than the first temperature setpoint.
A fluid heating device comprising:
- a tank configured to store a fluid;
- a pump configured to remove the fluid stored in the tank;
- a heater configured to heat the removed fluid to a predetermined temperature;
- a return pipe configured to return the fluid heated by the heater to the tank;
- a fluid supply valve configured to supply an unheated fluid into the tank;
- a fluid discharge valve provided in the return pipe and located downstream of the heater, the fluid discharge valve being configured to discharge the heated fluid;
- a temperature sensor configured to detect a temperature of the heated fluid;
- and
- a temperature controller configured to control an opening degree of each of the fluid supply valve and the fluid discharge valve to thereby control the temperature of the heated fluid, the temperature controller being configured to:
- control the opening degree of the fluid discharge valve based on the temperature detected by the temperature sensor,
- control the opening degree of the fluid supply valve based on the temperature detected by the temperature sensor, and
- compare a first temperature setpoint of the heated fluid to a second temperature setpoint that is set after the first temperature setpoint has been set,
- wherein the temperature controller is configured to control the pump such that the pump circulates the fluid at a minimum pumping flow rate based on the second temperature setpoint being less than the first temperature setpoint.
Dependencies are inferred from the claim text.