JPH02100707A - Motor fan - Google Patents

Abstract

PURPOSE:To apply a unit to be cooled which is low heating extent when the unit is used in a room where the ambient temperature is low and to save electric power by providing a fan, an input temperature detection part, a setting part, a rotation control part, and a motor electric power on/off switch. CONSTITUTION:A temperature value at which cooling is required by the motor fan A and a temperature value at which the cooling by the motor fan A is not necessary are set in a rotation start temperature value setting part 4 and a rotation stop temperature value setting part 3 in consideration of the environmental conditions, use conditions, heating conditions, etc., of the unit to be cooled. The heating temperature value of the unit B to be cooled is inputted to an input temperature detection part 1 through a temperature sensor interface line X. When the temperature value of the unit 3 which is cooled forcibly by the motor fan A decreases and a rotation detection part 2 detects the input temperature value decreasing below the set value of the rotation stop temperature value setting part 3, the fan 6 is powered off. Consequently, the unit B to be cooled is switched to natural air cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a motor fan used for cooling purposes, and more specifically, to a motor fan having a function of controlling all fans on and off according to a set temperature value.

(Prior Art) Conventionally, this type of motor fan was turned on when the power of the cooled unit was turned on, and continued to rotate steadily while it was on, regardless of the heat generation state of the cooled unit.

(Problem to be Solved by the Invention) Therefore, a cooling unit that generates a relatively small amount of heat does not waste power.

Noise caused by fan rotation also poses a problem.

An object of the present invention is to provide a motor fan that has a temperature setting section in the motor fan itself, and a circuit section that controls all fans on/off by comparing the set temperature and the temperature detected from the cooled unit. There is a particular thing.

(Means for Solving the Problems) In order to achieve the target sound, the motor fan according to the present invention includes a fan, an input temperature detection section that detects a temperature value from a cooled unit, and a temperature value that starts rotation of the fan. a setting unit that can set a temperature value at which to stop the motor; a rotation control unit that compares the temperature detected by the input temperature detection unit with the set temperature value; and a motor that turns on/off the motor power in accordance with the comparison output of the rotation control unit. It consists of a power on/off switch section.

(Example) The present invention will be described in more detail below with reference to all the drawings.

FIG. 1 is a diagram showing the relationship between a motor fan A, a cooled unit B, and a temperature sensor C according to the present invention.

The heat generation state of the cooled unit B is monitored by a temperature sensor C, and the temperature value is notified to the motor fan via the temperature sensor interface line X=2.

FIG. 2 is a block diagram showing an embodiment of a motor fan according to the present invention.

The input temperature value detection unit 1 and the 1-rotation control unit 2 are connected to the Mometsun.
, a one-rotation stop temperature value setting section 3 , a one-rotation start iIA degree setting section 4 , a motor power on/off switch section 5 , and a fan 6 .

A motor fan At is set in the rotation start temperature value setting section 4 in consideration of the environmental conditions, usage conditions, heat generation conditions, etc. of the cooled unit.
A temperature value that requires cooling by the motor controller and a temperature value that does not require cooling by the motor controller are set in the one rotation stop@degree value setting section 3, respectively.

The heat generation temperature value of the cooled unit) B is inputted to the input temperature value detection section II via the @degree sensor interface line X.

The rotation control unit 2 compares the temperature value sound read from the input temperature value detection unit 1 and the set value from the rotation start temperature value setting unit 4,
When the input temperature value becomes larger than the rotation start temperature setting value, the motor is instructed to turn on/off the fan 6 to the power on/off switch section 5. As a result, the motor power supply membrane/cutoff switch unit 5 turns on the power to the fan 6, and from this time on, the fan A causes the slight cooling unit B to be forcedly air-cooled.

Also, unlike the previous example, the value of the cooled unit 3, which was being forced air-cooled by using an inverted motor fan 8, dropped to 5.
When the rotation control unit 2 detects that the input temperature value is lower than the set value of the rotation stop power setting unit 3, the rotation control unit 2
Instructs to turn off the power to the motor power on/off switch section 51 and 77 . As a result, the motor power on/off switch unit 5 turns off the power to the fan 6 (Vh), and at this point, forced air cooling of the cooled unit (H) is completely stopped and the cooling is switched to natural air cooling.

(Effects of the Invention) As described above, the present invention is composed of a fan, an input degree detection section, a setting section, a one-rotation control section, and a motor power on/off switch, so that the following effects are achieved. There is.

■ When a cooled unit with a relatively low heat generation level is used indoors with a low temperature, the unit can be operated without rotating the motor, saving unnecessary power and eliminating noise caused by fan rotation.

■ Equipment installed in a computer room is often equipped with an underfloor air conditioning system, and in this case, the effect of term 0 is particularly enhanced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example in which the motor fan according to the present invention is used, and shows the relationship among the motor fan, the cooled unit, and the 1M degree sensor. FIG. 2 is a block diagram showing one embodiment of a motor fan according to the present invention. A...Motor fan B...Cooled unit C.
...-degree sensor X ... temperature sensor interface line Y ... motor fan power supply 1 ... input temperature value detection section 2 ... rotation control section 3.
...Rotation stop temperature value setting section 4...Rotation start temperature value setting section 5...Motor power on/off switch section 6...Fan patent applicant NEC Corporation Representative Patent attorney Hisatsuzu Inoro Figure 22

Claims (1)

[Claims] A fan, an input temperature detection section that detects a temperature value from a cooled unit, a setting section that can set a temperature value at which the rotation of the fan is started and a temperature value at which it is stopped; A motor fan comprising a rotation control section that compares set temperature values, and a motor power on/off switch section that turns on/off the motor power according to the comparison output of the rotation control section.