CN2694001Y - Multi-speed fan - Google Patents

Abstract

The utility model belongs to the technical field of the electric fan, a including gear change over switch, motor, many grades of wind speed electric fans of timing controller. The electric fan overcomes the defects that the electric fan in the prior art only utilizes different tap windings to generate different rotating speeds, the electric fan is subjected to three speed regulation of strong wind, medium wind and weak wind, and the electric fan stops running after the set time of the timing controller is reached, so that no wind exists at the moment. The use in summer easily causes people to wake up. The multi-gear wind speed electric fan is characterized in that a timing normally open switch of a timing controller is connected with a reactor in parallel. When the timing controller is operated to the set time, the normally closed switch is switched off, the reactor is connected in series in the gear change-over switch and the power circuit of the motor, the output air volume is further reduced but not stopped, a user can use strong wind before sleeping, and the strong wind can be automatically converted into small wind in the time after sleeping.

Description

Many grades of wind speed electric fans

Technical field

The utility model belongs to the electric fan technical field, is a kind of gear throw over switch that includes, motor, many grades of wind speed electric fans of timing controller.

Background technique

Existing electric fan as shown in fig. 1, include gear throw over switch 1, motor 2, timing controller 3, described gear throw over switch 1 decide contact 1A, 1B, the 1C correspondence links to each other with many tappings motor 2, the normally closed switch of timing controller is serially connected in the power loop.During use, rotate the movable touching plate of gear throw over switch 1, its moving contact K will decide contact 1A, 1B with each respectively, 1C contacts, each startup winding of many tappings motor 2 can be inserted in the power loop, utilize different tap windings, produce different rotating speeds, electric fan is carried out high wind, apoplexy, three kinds of speed governing of weak wind.

Also there is a kind of motor itself to have only a winding in addition, pressure governor of serial connection on this winding, described pressure governor is the inductance of one group of different induction reactance, also be to utilize gear throw over switch 1 to insert each inductance in the pressure governor in the power circuit respectively, change the voltage that is added on the motor by inserting different inductance, carry out the adjustment of air quantity.

The normally closed interlock that is in definition status of timing controller 3 is serially connected in the power loop of electric fan.Timer is transferred to set condition, when reaching the set time of timing controller, the timing controller action, normally closed interlock disconnects, and cuts off electric moter voltage, and electric fan shuts down, and has not just had wind this moment.The accent wind gear of the electric fan of this structure is by 1 decision of gear throw over switch.In the prior art, a kind of electric fan is arranged, between motor and gear throw over switch 1, increase a capacitor C again, and capacitor C is connected on motor 2 and decides between the contact 1D, form faint wind speed governing.So, if the speed governing of many gears need be set, the complex structure of gear throw over switch 1 not only, and need pressure governor or many tappings motors 2 of the different induction reactance of the many groups of configuration, complex structure not only, and product cost will be improved greatly.

Use the electric fan of said structure summer, shortcoming is to turn round in set time and can dry, then stop blowing afterwards suddenly, this is for being in dormant people, often because of flowing, hot outside stops suddenly easily, and the air temperature gathered around the human body is constantly risen and do not feel well, the people is waken up.

Summary of the invention

The purpose of this utility model is to provide a kind of to be had air quantity and regulates shelves and can increase doubly, after set time, and can automatically switch many grades of wind speed electric fans of the little wind that enters correspondence of strong wind.

For realizing the purpose of this utility model, described many grades of wind speed electric fans are on timing controller timing normal open switch and be connected to reactor.

During use, when timing controller moves to set time, described normally closed switch disconnects, this moment, reactor was serially connected in the power circuit of gear throw over switch and motor, make the voltage ratio set time that is added on the motor further descend before, the air quantity of output also further reduces, but can not stop, can allow the user before sleep, use strong wind, and can convert little wind automatically in the time after entering sleep.

Description of drawings

The drawing of accompanying drawing is described as follows:

Fig. 1 is the timing control circuit figure of original speed governing electric fan.

Fig. 2 is the electrical structure diagram of many grades of wind speed electric fans of the utility model.

Embodiment

Below in conjunction with accompanying drawing, specific embodiment of the utility model is described in further detail:

As shown in Figure 2, many grades of wind speed electric fans of the utility model include gear throw over switch (1), motor (2), timing controller (3), reactor (4).Described reactor (4) is a capacitor 6, and on capacitor 6 two ends and be connected to resistance (5), in case shutdown and when sending power plug, plug pin produces discharge and electric shock human body.Gear throw over switch (1) has four driving switch, is respectively K1, K2, K3, K4.Timing controller (3) has a K switch 5 and timing normal open switch K6,

Timing controller (3) and gear throw over switch (1) and the motor (2) or the many tappings motor (2) that have a step down transformer are connected in the power circuit, in the K switch 5 of timing controller (3) or when regularly normal open switch K6 is closed, regulation stall throw over switch (1), driving switch K2, K3, the K4 of gear throw over switch (1) are connected respectively, can regulate the rotating speed of motor (2), realize that big high wind, big apoplexy reach the adjusting purpose with the third gear air quantity of pathogenic south wind.Timing controller (3) is when entering definition status, K switch 5 disconnects, timing normal open switch K6 closure, after reaching set time, regularly normal open switch K6 disconnects, reactor (4) is serially connected in the power loop, make and connected a reactor (4) again having on the motor of step down transformer (2) or the many tappings motor (2), operating voltage on the motor (2) further descends, above-mentioned big high wind, big apoplexy reaches with pathogenic south wind and reduces one-level respectively, become little high wind, cockleshell reaches and little weak wind, not only reaches the purpose of automatic timing conversion air quantity, and has become six air quantity regulation stalls.So can realize doubling the air quantity adjustment of gear by the combination of gear throw over switch (1) and timing controller (3).Only be to have increased a resistance and a capacitor compared with original technology this moment, reached and utilized minimum device, realizes the multiplication of regulation stall and the purpose that large and small wind automatic timing switches.

Claims (3)

1. A multi-speed wind speed electric fan, comprising a timing controller (3), characterized in that a reactor (4) is connected to the timing controller (3) and a normally open switch K6. 2. The multi-speed wind speed electric fan according to claim 1, characterized in that said reactor (4) is a capacitor (6). 3. The multi-speed wind speed electric fan according to claim 2, characterized in that the two ends of the capacitor (6) are connected in parallel with resistors (5).

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