CN203336766U

CN203336766U - Speed control device for outdoor fan of air conditioner

Info

Publication number: CN203336766U
Application number: CN2013202409409U
Authority: CN
Inventors: 林国华; 钟国权
Original assignee: Zhuhai Renovo Electronic & Mechanical Equipment Co Ltd
Current assignee: Zhuhai Renovo Electronic & Mechanical Equipment Co Ltd
Priority date: 2013-05-07
Filing date: 2013-05-07
Publication date: 2013-12-11
Anticipated expiration: 2023-05-07

Abstract

The utility model discloses a speed control device for an outdoor fan of an air conditioner. The speed control device comprises a drive circuit, a transformer having multilevel output, contactors and a switching control module. The transformer having multilevel output is adopted in the speed control device, and output of different levels of the transformer can carry out switching output through the controllable contactors. When the speed control device works, the switching control module carries out control switching on the contactors on the basis of air conditioner working pressure obtained through detection, so the fan can work correspondingly under different magnitudes of voltage, then can operate at a corresponding rotating speed and can be matched with the air conditioner working pressure. The speed control device is low in cost and is not influenced by electromagnetic noise in working; compared with chopped wave voltage reduction speed control, the speed control device can reduce cost, even low-frequency noise does not exist, and the fault rate of the speed control device is lower.

Description

The outdoor fan of air-conditioner speed-regulating control device

Technical field

The utility model relates to the control technology of outdoor fan of air-conditioner, is specifically related to a kind of outdoor fan of air-conditioner speed-regulating control device.

Background technology

In general, the off-premises station of air-conditioning unit is for adapting to the varying environment working condition requirement, and unit need to carry out condensing pressure or the water temperature of speed regulating control to maintain OK range to blower fan when the varying environment temperature is moved.The current mode of speed regulation of more generally using has step-less adjustment and ON/OFF to regulate, step-less adjustment exactly by frequency conversion or time variant voltage (being mainly chopper control) thus control the frequency of blower fan or rotating speed change air quantity that voltage changes blower fan maintains stable pressure or water temperature; ON/OFF regulate to be exactly to control opening-stop and reaching pressure or the water temperature that maintains OK range of blower fan by pressure controller.

Frequency control need to be added frequency converter, and cost is high, and has electromagnetic noise; And the speed governing of copped wave time variant voltage need to be added the variable voltage speed control device, its low-frequency noise is very large, also can cause resonance; The ON/OFF speed governing is to control blower fan by switching mode pressure (temperature) controller, simple and practical, but can only be regulated by the opening and closing blower fan, can cause that system pressure is unstable.

Summary of the invention

For the problems referred to above, the utility model provides a kind of cost, there is no electromagnetic noise, failure rate is low, the effective outdoor fan of air-conditioner speed-regulating control device of speed governing.

The utility model is that the technical scheme that its technical problem of solution adopts is:

The outdoor fan of air-conditioner speed-regulating control device comprises: fans load; Transformer with multistage output, the input of transformer is connected with the mains-supplied loop; Two or more contactors, each contactor comprises at least two group main contacts and the control coil that closes minute state for controlling main contact, the input side of two groups of main contacts is connected with ground wire with a wherein output of transformer, and outlet side is connected with fans load; The switching controls module, described switching controls module comprises control module and for detection of the sensing unit of air-conditioning work pressure, the output of sensing unit is connected with the input of control module, control module is provided with and closes the sub-signal output, closes the sub-signal output and is connected with the control coil of contactor.

Preferred embodiment, the quantity of contactor is three, comprise the first contactor, the second contactor and the 3rd contactor, each contactor is provided with one group of normally closed auxiliary contact, control module comprises that three are controlled change-over switch, it is the first control change-over switch, second controls change-over switch and the 3rd controls change-over switch, each is controlled change-over switch and comprises switch loop and the trigger end opened and closed for the gauge tap loop, one end in switch loop is connected with the mains-supplied loop, the other end is as closing the sub-signal output, sensing unit is provided with three triggering signal outputs, sensing unit is connected with the trigger end of controlling change-over switch respectively by the triggering signal output, one side of the control coil of the first contactor is connected with a side of the normally closed auxiliary contact of the second contactor, one side of one side of the control coil of opposite side and the second contactor and the normally closed auxiliary contact of the 3rd contactor also connects, the opposite side of the normally closed auxiliary contact of the second contactor is connected with the first sub-signal output that closes of controlling change-over switch, the opposite side of the second contactor control coil is connected with the second sub-signal output that closes of controlling change-over switch, the opposite side of the normally closed auxiliary contact of the 3rd contactor and a side of control coil are connected with ground wire, the opposite side of control coil is connected with the 3rd sub-signal output that closes of controlling change-over switch.

Preferred embodiment, described mains-supplied is serially connected with master switch on loop.

The beneficial effects of the utility model are: the utility model adopts a transformer with multistage output, the output of this transformer different stage is switched output by controlled contactor, during work, the air-conditioning work pressure that the switching controls module obtains based on detection is controlled switching to contactor, make blower fan correspondingly to work under different voltage swings, and then can under corresponding rotating speed, move, and be complementary with air-conditioning work pressure.The said apparatus cost is low, there is no the impact of electromagnetic noise during work; Comparing the chopping depressuring speed regulating control can reduce costs, and there is no especially low-frequency noise; Its fault rate is also lower.

The accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, be further detailed:

The composition schematic diagram that Fig. 1 is a kind of embodiment of the utility model.

The specific embodiment

Main Function of the present utility model is automatically to change according to the size of air-conditioning work pressure the operating voltage of blower fan, makes the rotating speed of blower fan to be complementary with the air-conditioning work state, guarantees that air-conditioning system is stable normal.Particularly, the utility model can be controlled blower fan and work under different conditions under the voltage of a certain correspondence, and due to the voltage difference, so corresponding change can occur the corresponding rotating speed of blower fan.With reference to Fig. 1, device of the present utility model comprises for fans load 1, the contactor 4 with the transformer 2 of multistage output, some quantity, switching controls module etc., and certainly, the power supply of this device generally adopts mains-supplied loop 3.

Wherein, fans load 1 is general adopts mode in parallel to work, and the quantity of fans load 1 is not limit, and its demand according to system is configured.In the present embodiment, the quantity of fans load 1 is 3.When voltage swing changes, the rotating speed of fans load 1 changes.

Transformer 2 has multistage output, and its input is connected with mains-supplied loop 3.During work, it changes line voltage (being generally 220V), and can produce the output voltages of the different sizes of multichannel.The output progression of transformer can be arranged as required, and more its switchable output voltages of quantity are more, more accurate and accurate to the control speed governing of blower fan.In general embodiment, as shown in Figure 1, transformer comprises that three grades of outputs just can meet the requirement of use.Particularly, in the embodiment in figure 1, transformer 2 has the output voltage values of 90V, 160V, 220V, when blower fan is operated in above-mentioned magnitude of voltage respectively in low, the pressure of corresponding air-conditioning work pressure, state that pressure is high.

Contactor 4 is arranged between transformer 2 and fans load 1, for control transformer respectively 2 every grade output and drive circuit 1 between the conducting state in loop.The quantity of contactor 4 is general identical with the output progression of transformer 2, certainly, also can be less than the output progression of transformer 2.Each contactor 4 comprises at least two group main contacts and the control coil that closes minute state for controlling main contact, and the input side of two groups of main contacts is connected with ground wire with a wherein output of transformer, and outlet side is connected with fans load.This contactor is general adopts equipment commonly used to realize, in equipment commonly used, the quantity of main contact is generally three groups, only need to use wherein two groups during use.A plurality of contactors 4 section at one time can only have a conducting, i.e. the output of transformer 2 only has a road to be connected with fans load 1.

The switching controls module is for being controlled minute state that closes of all contactors 3.The switching controls module comprises control module 51 and for detection of the sensing unit 52 of air-conditioning work pressure, the output of sensing unit 52 is connected with the input of control module 51, control module 51 is provided with and closes the sub-signal output, closes the sub-signal output and is connected with the control coil of contactor 4.

In the present embodiment, the quantity of contactor 4 is three, comprises the first contactor 41, the second contactor 42 and the 3rd contactor 43, and each

contactor

41,42,43 is provided with one group of normally closed auxiliary contact.Control module 51 comprises that three are controlled change-over switch, is that the first control change-over switch 511, second is controlled change-over switch 512 and the 3rd control change-over switch 513.Each is controlled change-over switch 511,512,513 and comprises switch loop and the trigger end opened and closed for the gauge tap loop, and an end in switch loop is connected with the mains-supplied loop, and the other end is as closing the sub-signal output.Sensing unit 52 is provided with three triggering signal outputs, and sensing unit 52 is connected with the trigger end of controlling change-over switch 511,512,513 respectively by the triggering signal output.One side A1 of the control coil of the first contactor 41 is connected with a side NC of the second contactor 42 normally closed auxiliary contacts, one side NC of one side A2 of the control coil of opposite side A2 and the second contactor 42 and the 3rd contactor 43 normally closed auxiliary contacts also connects, the opposite side NC of the second contactor 42 normally closed auxiliary contacts is connected with the first sub-signal output L1 that closes that controls change-over switch 511, the opposite side A1 of the second contactor 42 control coils is connected with the second sub-signal output L2 that closes that controls change-over switch 512, one side A2 of the opposite side NC of the 3rd contactor 43 normally closed auxiliary contacts and control coil is connected with ground wire, the opposite side A1 of control coil is connected with the 3rd sub-signal output L3 that closes that controls change-over switch 513.

During work, 52 pairs of air-conditioning work pressure of sensing unit are detected, and the data that obtain based on detection change the signal of triggering signal output, make the switch circuit closed in corresponding control change-over switch.When the first control change-over switch 511 closures, the second control change-over switch 512 and the 3rd control change-over switch 513 are opened, the normally closed auxiliary contact of the second contactor 42 and the 3rd contactor 43 is in closure state, the first sub-signal output that closes of controlling change-over switch 511 forms loop along the normally closed auxiliary contact of the second contactor 42, the control coil of the first contactor 41, normally closed auxiliary contact and the ground wire of the 3rd contactor 43 successively, the main contact closure of the first contactor 41, the main contact of other contactors disconnects; In like manner, when the second control change-over switch 512 closures, the first control change-over switch 511 and the 3rd control change-over switch 513 are opened, the second sub-signal output that closes of controlling change-over switch 512 forms loop along the control coil of the second contactor 42, normally closed auxiliary contact and the ground wire of the 3rd contactor 43 successively, the main contact closure of the second contactor 42, the main contact of other contactors disconnects; When the 3rd control change-over switch 513 closures, the first control change-over switch 511 and the second control change-over switch 512 are opened, the 3rd controls control coil and the ground wire formation loop that the sub-signal output passes through the 3rd contactor 43 of closing of change-over switch 513, the main contact closure of the 3rd contactor 43, the main contact of other contactors disconnects.Only have a contactor closure based on above-mentioned this control device of operation principle at one time, realize the power supply to fans load 1.

In order to make device work more safe and reliable, generally also be serially connected with master switch 6 on mains-supplied loop 3.

Embodiment of the present utility model is not restricted to the described embodiments, as long as it reaches technique effect of the present utility model with essentially identical means, all should belong to protection domain of the present utility model.

Claims

1. outdoor fan of air-conditioner speed-regulating control device is characterized in that comprising:

Fans load (1);

Transformer (2) with multistage output, the input of transformer (2) is connected with mains-supplied loop (3);

Two or more contactors (4), each contactor (4) comprises at least two group main contacts and the control coil that closes minute state for controlling main contact, the input side of two groups of main contacts is connected with ground wire with a wherein output of transformer (2), and outlet side is connected with fans load (1);

The switching controls module, described switching controls module comprises control module (51) and for detection of the sensing unit (52) of air-conditioning work pressure, the output of sensing unit (52) is connected with the input of control module (51), control module (51) is provided with and closes the sub-signal output, closes the sub-signal output and is connected with the control coil of contactor (4).

2. outdoor fan of air-conditioner speed-regulating control device according to claim 1, the quantity that it is characterized in that contactor (4) is three, comprise the first contactor (41), the second contactor (42) and the 3rd contactor (43), each contactor (41, 42, 43) be provided with one group of normally closed auxiliary contact, control module (51) comprises that three are controlled change-over switch, it is the first control change-over switch (511), second controls change-over switch (512) and the 3rd controls change-over switch (513), each controls change-over switch (511, 512, 513) comprise switch loop and the trigger end opened and closed for the gauge tap loop, one end in switch loop is connected with the mains-supplied loop, the other end is as closing the sub-signal output, sensing unit (52) is provided with three triggering signal outputs, sensing unit (52) by the triggering signal output respectively with control change-over switch (511, 512, 513) trigger end connects, one side of the control coil of the first contactor (41) is connected with a side of the normally closed auxiliary contact of the second contactor (42), one side of one side of the control coil of opposite side and the second contactor (42) and the normally closed auxiliary contact of the 3rd contactor (43) also connects, the opposite side of the normally closed auxiliary contact of the second contactor (42) is connected with the first sub-signal output that closes of controlling change-over switch (511), the opposite side of the second contactor (42) control coil is connected with the second sub-signal output that closes of controlling change-over switch (512), the opposite side of the normally closed auxiliary contact of the 3rd contactor (43) and a side of control coil are connected with ground wire, the opposite side of control coil is connected with the 3rd sub-signal output that closes of controlling change-over switch (513).

3. outdoor fan of air-conditioner speed-regulating control device according to claim 1 and 2, is characterized in that on described mains-supplied loop (3) being serially connected with master switch (6).