COOLING FAN AUTOMATIC CONTROL SYSTEM AND COOLING FAN AUTOMATIC CONTROL DEVICE

• US 20180363938A1
• Filed: 06/12/2018
• Published: 12/20/2018
• Est. Priority Date: 06/15/2017
• Status: Active Grant

• Current Assignee: Sanyo Denki Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Denki Company Limited (Panasonic Holdings Corporation)
• Inventors: MURAKAMI, Naoki, MURAKAMI, Masashi
• Granted Patent: US 10,712,041 B2
• Time in Patent Office: Days
• CPC Class Codes: F24F 11/64 using pre-stored data
• CPC Class Codes: F24F 11/76 by means responsive to temperature, e.g. bimetal springs
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2140/60 Energy consumption
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/2614 HVAC, heating, ventillation, climate control
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A cooling fan automatic control system includes: a temperature sensor configured to measure a temperature of an object to be cooled; a plurality of current sensors configured to measure power consumption by each of a plurality of cooling fans; and a controller which, when a measured temperature that is a measured value obtained by the temperature sensor is higher than a target cooling temperature of the object to be cooled, controls rotational speeds of the plurality of cooling fans so as to minimize a total of measured current values of the plurality of cooling fans obtained by the plurality of current sensors.

Claims

1. A cooling fan automatic control system comprising:

a temperature sensor configured to measure a temperature of an object to be cooled;

a plurality of current sensors configured to measure power consumption by each of a plurality of cooling fans; and

a controller which, when a measured temperature that is a measured value obtained by the temperature sensor is higher than a target cooling temperature of the object to be cooled, controls rotational speeds of the plurality of cooling fans so as to minimize a total of measured current values of the plurality of cooling fans obtained by the plurality of current sensors.

2. The cooling fan automatic control system according to claim 1, wherein the controller controls the plurality of cooling fans so as to decrease the rotational speeds in order from a cooling fan of which the measured current value is higher.

3. The cooling fan automatic control system according to claim 1, wherein the controller controls the plurality of cooling fans so as to decrease the rotational speeds of the plurality of cooling fans in a pre-set order.

4. The cooling fan automatic control system according to claim 1, further comprising a storage unit configured to store, for each target cooling temperature, such a combination of the rotational speeds of the plurality of cooling fans as to minimize the total of the measured current values obtained by the plurality of current sensors,

wherein the controller controls the rotational speeds of the plurality of cooling fans so as to be equal to the rotational speeds of the plurality of cooling fans stored in the storage unit.

5. A cooling fan automatic control device, comprising a controller configured to control, when a measured temperature of an object to be cooled is higher than a target cooling temperature, rotational speeds of a plurality of cooling fans so as to minimize a total of power consumption by each of the plurality of cooling fans.