CN201321998Y

CN201321998Y - Alternating current fan speed regulator

Info

Publication number: CN201321998Y
Application number: CNU2008201994207U
Authority: CN
Inventors: 朱鸽; 金慧峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-03
Filing date: 2008-12-03
Publication date: 2009-10-07
Anticipated expiration: 2018-12-03

Abstract

An alternating current fan speed regulator comprises a singlechip, a temperature sensor for detecting the present temperature of controlled environment and delivering the detecting results into the singlechip, an output module and a power supply module, wherein the mode of operation and the set value of temperature of the alternating current fan speed regulator are preset in the singlechip, the output module comprises a controllable silicon for changing the electric voltage on an alternating current fan according to the orders of the singlechip and a zero-crossing detecting circuit for detecting the zero-crossing input of the alternating current charged on the controllable silicon into the singlechip. Furthermore, the singlechip can compare the present controlled environment temperature detected by the temperature sensor with the set temperature value inside the singlechip and then calculates differential value, so the singlechip can control the conduction angle of the controllable silicon singlechip according to the differential value of the present controlled environment temperature and the set temperature value. By employing the singlechip technology to upgrade the traditional alternating current fan speed regulator, the closed-loop control can be carried out according to the detected temperature, the preset mode of operation and the set temperature value, thereby not only being able to carry through the stepless speed regulating of the alternating current fan, but also being able to control the opening or closing of the alternating current fan.

Description

Governor for AC blower fan

Technical field

The utility model relates to a kind of governor for AC blower fan, especially a kind ofly is used for temperature controlled governor for AC blower fan.

Background technique

The AC blower fan speed control system is most relevant with temperature control, for example cooling machine cabinet blower fan of electric power, communications equipment, the control of central air-conditioner fan coil unit etc.It generally all is open loop control that this class is used, by the mode speed governing of manually switching the different taps of series inductance or switching tap blower fan with switch.Also have and use closed loop thermal to control, generally use common temperature detect switch (TDS), can only open or close blower fan according to the height of temperature, can not speed governing.

The model utility content

The purpose of this utility model is to provide a kind of governor for AC blower fan that uses singlechip technology, can carry out stepless speed regulation according to the Current Temperatures of detected controlled environment to AC blower fan.

In order to achieve the above object, the technological scheme that the utility model adopted is:

A kind of governor for AC blower fan comprises single-chip microcomputer, and the internal preset of single-chip microcomputer has the mode of operation and the desired temperature of governor for AC blower fan; Temperature transducer, sensor are used to detect the Current Temperatures of controlled environment, and detected temperature signal is sent into single-chip microcomputer; Output module, output module comprise according to the instruction of single-chip microcomputer and change the controllable silicon that is added to the voltage swing on the AC blower fan, are used to detect Zero Crossing Point that is loaded into the silicon controlled Ac and the zero-crossing detection circuit of checkout value being imported single-chip microcomputer; Power module, it is the governor for AC blower fan circuit supply that power module is converted to stable low-voltage DC with the external communication electricity; Single-chip microcomputer compares the Current Temperatures of the detected controlled environment of temperature transducer and the desired temperature of its internal preset and computing, and according to the Current Temperatures of controlled environment and the difference control silicon controlled angle of flow of desired temperature.

Because the employing of technique scheme the utlity model has following advantage:

The utility model is used singlechip technology, traditional governor for AC blower fan function is upgraded, can carry out closed loop control according to detected temperature and preset working pattern, desired temperature, both can carry out the stepless speed regulation of AC blower fan, also can control opening or closing of AC blower fan.

Description of drawings

Fig. 1 is a theory diagram of the present utility model;

Wherein: 1, single-chip microcomputer; 2, power module; 3, display modular; 4, temperature transducer; 5, keyboard input module; 6, audible and visual alarm device; 7, output module; 71, controllable silicon; 72, zero-crossing detection circuit; 8, AC blower fan.

Embodiment

AC blower fan 8 speed regulators as shown in Figure 1 comprise

Single-chip microcomputer 1, the internal preset of single-chip microcomputer 1 have the mode of operation and the desired temperature of governor for AC blower fan;

Temperature transducer 4, be used to detect the Current Temperatures of controlled environment, and detected temperature signal sent into single-chip microcomputer 1, the Current Temperatures of the controlled environment here is meant the Current Temperatures as the rack inside of electric power, communications equipment, also can be meant as indoor Current Temperatures of central air-conditioner or the like is installed;

Output module 7, output module 7 comprise according to the instruction of single-chip microcomputer 1 and change the controllable silicon 71 that is added to the voltage swing on the AC blower fan 8, are used to detect the Zero Crossing Point of the Ac that is loaded into controllable silicon 71 and checkout value imported the zero-crossing detection circuit 72 of single-chip microcomputer 1;

Power module 2, being used for the external communication electricity is converted to stable low-voltage DC is the governor for AC blower fan circuit supply;

Display modular 3 is used for showing at least a of numeral, literal, pattern-information three according to the instruction of described single-chip microcomputer 1, as is used for the current temperature value of showing temperature sensor 4 detected controlled environment;

Keyboard input module 5 is used for the predefined value of mode of operation, desired temperature and the temperature difference is imported described single-chip microcomputer 1.

Single-chip microcomputer 1 is delivered to the Current Temperatures of temperature transducer 4 detected controlled environment that display modular 3 shows and the desired temperature of itself and its internal preset is compared and computing, and according to the angle of flow of the difference control controllable silicon 71 of the Current Temperatures of controlled environment and desired temperature, this is to put by the triggered time of control controllable silicon 71 to realize.

When the Current Temperatures of detected controlled environment was too high, the angle of flow of controllable silicon 71 increased, and the AC blower fan rotating speed improves, the Current Temperatures of detected controlled environment hanged down when hanging down, the angle of flow of controllable silicon 71 reduces, and the AC blower fan rotating speed reduces, and reaches the purpose of closed loop control temperature.

This adjusting has also comprised this two kinds of operations of opening or closing of control AC blower fan 8, and the promptly corresponding angle of flow is 0 or full conducting.

Can determine the switch motion of the output speed or the control AC blower fan 8 of corresponding AC blower fan 8 by the mode of operation of single-chip microcomputer 1 internal preset.

Single-chip microcomputer 1 internal preset has too high alarming value of temperature and temperature to cross low alarming value, and governor for AC blower fan also comprises the audible-visual annunciator 6 that sends sound, visual alarm according to the instruction of single-chip microcomputer 1.When the Current Temperatures of temperature transducer 4 detected controlled environment surpassed the too high alarming value of temperature and temperature and crosses the scope of low alarming value, single-chip microcomputer 1 sent alarm command to audible-visual annunciator 6.

Working principle of the present utility model is:

Single-chip microcomputer 1 is according to the output speed or the switch motion of parameter control AC blower fan 8 such as the desired temperature of the Current Temperatures of temperature transducer 4 detected controlled environment and internal preset and the temperature difference.The assumed temperature setting value is d ℃, and the temperature difference is f ℃, has two kinds of mode of operations:

1, stepless speed regulation pattern

Single-chip microcomputer 1 is according to the angle of flow of the controllable silicon 71 in the Current Temperatures control output module 7 of temperature transducer 4 detected controlled environment, the angle of flow of controllable silicon 71 increased when temperature was high, AC blower fan 8 rotating speeds improve, and the angle of flow of controllable silicon 71 reduced when temperature was low, and AC blower fan 8 rotating speeds reduce.

When temperature is higher than (d+f) ℃, angle of flow maximum, AC blower fan 8 full-speed operations; When temperature was lower than (d-f) ℃, the angle of flow was 0, and AC blower fan 8 stops.When temperature was between (d-f) ℃ and (d+f) ℃, AC blower fan 8 was operated in the stepless speed regulation state.

2, ON/OFF control mode

Single-chip microcomputer 1 is controlled opening or closing of AC blower fan 8 according to the Current Temperatures of temperature transducer 4 detected controlled environment.When temperature is higher than (d+f) ℃, the controllable silicon 71 full conductings in the single-chip microcomputer 1 control output module 7, AC blower fan 8 full-speed operations; When temperature dropped to (d-f) ℃, the controllable silicon in the single-chip microcomputer 1 control output module was closed, and AC blower fan 8 stops.When temperature was between (d-f) ℃ and (d+f) ℃, the working state of AC blower fan 8 was constant.

Above-mentioned two kinds of mode of operations, desired temperature and temperature difference can be adjusted respectively by the operation interface that is made of key-press module 5 and display modular 3 by the user.

The utility model is used singlechip technology, traditional governor for AC blower fan function is upgraded, can carry out closed loop control according to detected temperature and preset working pattern, desired temperature, both can carry out the stepless speed regulation of AC blower fan, also can control opening or closing of AC blower fan.Also increase functions such as temperature demonstration and parameter are provided with simultaneously, can show the Current Temperatures of controlled environment.

Claims

1, a kind of AC blower fan (8) speed regulator, it is characterized in that: it comprises

Single-chip microcomputer (1), the internal preset of described single-chip microcomputer (1) has mode of operation, desired temperature, the temperature difference of governor for AC blower fan;

Temperature transducer (4), described temperature transducer (4) is used to detect the Current Temperatures of controlled environment, and detected described temperature signal is sent into described single-chip microcomputer (1);

Output module (7), described output module (7) comprise that the instruction according to described single-chip microcomputer (1) changes the controllable silicon (71) that is added to the voltage swing on the described AC blower fan (8), the zero-crossing detection circuit (72) that is used for detecting the Zero Crossing Point of the Ac that is loaded into described controllable silicon (71) and checkout value is imported described single-chip microcomputer (1);

Power module (2), it is described governor for AC blower fan circuit supply that described power module (2) is converted to stable low-voltage DC with the external communication electricity;

Described single-chip microcomputer (1) compares the current temperature value of the detected controlled environment of described temperature transducer (4) and the described desired temperature of its internal preset and computing, and controls the angle of flow of described controllable silicon (71) according to the difference of the Current Temperatures of described controlled environment and desired temperature.

2, AC blower fan controller according to claim 1 is characterized in that: described single-chip microcomputer (1) internal preset has too high alarming value of temperature and temperature to cross low alarming value.

3, governor for AC blower fan device according to claim 2 is characterized in that: it also comprises the audible-visual annunciator (6) that sends sound, visual alarm according to the instruction of described single-chip microcomputer (1).

4, governor for AC blower fan device according to claim 3, it is characterized in that: when the Current Temperatures of the detected controlled environment of described temperature transducer (4) surpassed the too high alarming value of described temperature and temperature and crosses the scope of low alarming value, described single-chip microcomputer (1) sent alarm command to described audible-visual annunciator (6).

5, governor for AC blower fan according to claim 1 is characterized in that: it also comprises according to the instruction of described single-chip microcomputer (1) and shows at least a display modular (3) among numeral, literal, the pattern-information three.

6, governor for AC blower fan according to claim 1 is characterized in that: it also comprises the keyboard input module (5) of the predefined value of mode of operation, desired temperature and the temperature difference being imported described single-chip microcomputer (1).