CN201663580U - Intelligent fan electricity-saving appliance - Google Patents

Abstract

The utility model discloses an intelligent fan electricity-saving appliance, which belongs to the technical field of electricity-saving appliances. The intelligent fan electricity-saving appliance comprises a cabinet body, a main loop circuit, a secondary control loop circuit and a regulation monitoring circuit, wherein the main loop circuit consists of an air switch QF, an AC contactor KM1, an AC contactor KM2, a wave filter LC, a frequency converter BIANPIN and conducting wires, a 380V power supply of a three-phase electric network is divided into two paths through an input wiring terminal, one path is connected with the air switch QF through the conducting wire, the other end of the air switch QF is connected with the wave filter LC, the other end of the wave filter LC is connected with the input end of the frequency converter BIANPIN, the output end of the frequency converter BIANPIN is connected with the AC contactor KM2, the other path is connected with the AC contactor KM1 through the conducting wire, and the other end of the AC contactor KM1 is connected with the other end of the AC contactor KM2 and an output terminal. The utility model has the advantages of multifunction, low noise, convenient operation, electric energy saving and the like.

Description

Intelligence blower fan electricity-saving appliance

Technical field

The utility model discloses a kind of intelligent blower fan electricity-saving appliance, belong to the battery saving arrangement technical field.

Background technology

The common blower fan that is using in enterprise, these equipment all compare machinery, generally all drive with alternating current motor.Wherein most of motor all is not to be operated in the scope of rated power, and often has only the 50%-70% of rated power, even lower.But the motor major part is in the constant-speed operation state, and carries out the adjusting of wind flow with flapper valve, but motor also is in the high-speed cruising state, thereby loses a large amount of electric energy in vain.The electric energy of the blower fan loss that power is big more is many more, and the electric energy of waste is also many more.

The utility model content

In order to address the above problem, the utility model provide a kind of can saves energy, can improve the intelligent stably blower fan electricity-saving appliance of precision benefit again.

The technical scheme of the utility model technical solution problem is as follows: a kind of intelligent blower fan electricity-saving appliance, comprise cabinet, main loop circuit, the secondary control loop circuit, the adjusting supervisory circuit is formed, it is characterized in that: main loop circuit is by air switch QF, A.C. contactor KM1, A.C. contactor KM2, filter LC, frequency converter B IANPIN and lead are formed, three phase network 380V power supply is divided into two-way through the input wires terminal: the one tunnel links to each other with air switch QF through lead, the air switch QF other end links to each other with filter LC, the filter LC other end links to each other with frequency converter B IANPIN input, and frequency converter B IANPIN output links to each other with A.C. contactor KM2; Another road links to each other with A.C. contactor KM1 through lead, and the A.C. contactor KM1 other end links to each other with lead-out terminal with the A.C. contactor KM2 other end;

Secondary control loop circuit and adjusting supervisory circuit are made up of adjuster D1, fuse FU, button SB, fan FS, driving switch SA, indicator light (HR, HG, HY), frequency converter B IANPIN control terminal, ac contactor coil (KM1, KM2), normally-open normally-close contact and lead;

Phase line by lead, fusible link FU, driving switch SA, ac contactor coil KM1 with power frequency indicator light HR parallel connection, A.C. contactor KM2 is normally closed links to each other with zero line N;

Phase line by lead, fusible link FU, driving switch SA, ac contactor coil KM2 with power frequency indicator light HG parallel connection, A.C. contactor KM1 is normally closed links to each other with zero line N;

Phase line by lead, fusible link FU, A.C. contactor KM2 often open, fan machine FS links to each other with zero line N;

Phase line is often opened, is linked to each other with zero line N by the lead-out terminal able to programme of lead, fusible link FU, malfunction indicator lamp HY, frequency converter B IANPIN;

Adjuster D1, link to each other with the analog input terminal of frequency converter B IANPIN by lead.

The utlity model has that function is many, noise is low, easy for operation, advantages such as saves energy.It is that blower fan is controlled, and belongs to reduce aerodynamic power-saving method, and the method for controlling air quantity with damper commonly used compares, and has tangible power savings.By we can say bright its electricity principle with figure below:

In this curve chart, curve (1) is blast one air quantity (H-Q) characteristic of blower fan under constant rotational speed n1, and curve (2) is a pipe network windage characteristic (full trrottle).

It is the highest to suppose that blower fan is operated in the A point efficiency, and this moment, blast was H2, and air quantity is Q1, and shaft power N1 is directly proportional with the product of Q1, H2, and usable area AH20Q1 represents in the drawings.If manufacturing technique requirent, air quantity need reduce to Q2 from Q1, and at this moment the method with damper is equivalent to increase resistance of pipe system, makes the resistance of pipe system characteristic change to curve (3), and system changes to new operating point B operation by original operating point A.As seen from the figure, blast increases on the contrary, and shaft power is directly proportional with area B H1OQ2.Obviously, shaft power descends little.If adopt the economize on electricity control mode, rotation speed of fan drops to n2 by n1, according to the proportionality law of fan parameter, draws in rotation speed n 2 air quantity (Q-H) characteristic, shown in curve (4).As seen under the situation that satisfies same air quantity Q2, blast H3 reduces significantly, and power N3 is along with remarkable minimizing, and CH30Q2 represents with area.Power Δ N=(the H1-H3) * Q2 that saves, H1H3C represents with area B.Obviously, the economic effect of economize on electricity is fairly obvious.

By fluid mechanics as can be known, air quantity is directly proportional with the first power of rotating speed, square being directly proportional of blast H and rotating speed, and shaft power N is directly proportional with the cube of rotating speed.Adopt the economize on electricity speed governing, when air quantity drops to 80%, rotating speed also drops to 80%, and shaft power N will drop to 51.2% of rated power, if air quantity drops to 60%, shaft power N can drop to 21.6% of rated power, even also need to consider certainly because the efficient reduction that the rotating speed reduction can cause and the effectiveness affects of additional control device etc. like this, this economize on electricity numeral also is very considerable, therefore in the machinery of blower fan is housed, adopting the rotating speed control mode to regulate air quantity, is effective method in economize on electricity.

The blower fan electricity principle is by following diagram shows:

The blower motor power output is proportional to rotating speed cube relation, use Energy Saving Control, flow descends, and can keep constant voltage HT if rotating speed drops to 80% of rated speed, and shaft power drops to 51.2% of rated power, flow drops to Q3, if make lift constant, can make rotating speed drop to 70% of rated speed, this moment, shaft power was 34.3% of rated value, economize on electricity reaches 5.7%, and economic benefit is fairly obvious.Usually induction motor adopts the method that directly inserts the electrical network starting, doubly not only loss is big for 5-7 when the starting current of motor is specified, impact also big to electrical network, mechanical wear, vibrate all big, and with this energy-conservation control electric motor starting, starting current can be restricted under 1.2 times of rated current, the starting power consumption reduces greatly like this, neither impacts electrical network, again impulse machine not.

Any manufacturing machine that utilizes induction alternating current (AC) motor as mode of electric drive, power of electric motor is selected by peak load phase rated load.And when work the overwhelming majority can not full-load run, motor works in full voltage, full gear degree and load is very little, also has a lot of time light runnings, can be known motor by design of electrical motor and operation characteristic

Only operate in full load and be only most effective, power factor optimum, cause many unnecessary electric energy losses during underloading.This electricity-saving appliance adopts the method that detects the load size, minimizing according to load, suitably reducing stator voltage can raise the efficiency, this is because the stator current real component is very little when underloading, zero load, and mainly be the reactive current of excitation, so COS ￠ is very low, and what account for Main Ingredients and Appearance in the no-load loss is the iron loss of stator full voltage, a bit do not reduce, so efficient is very low.If suitably reduce stator voltage during underloading, see motor stator induced potential formula: U1 ≈ E1=4.44F1N1KN1 ￠ m

Wherein: the every phase winding turns-in-series of U1-stator; KN1 is because underloading, stator current is very little when unloaded, can ignore the leakage impedance pressure drop of stator winding, so U1 ≈ E1, when other conditions are constant, reduce stator voltage U1, then ￠ m ratio descends, also be the also proportional decline of excitation reactive current IM, idle component in the stator current has reduced like this, and COS ￠ has just improved, and suitably control can be near optimum value.In addition, other conditions are constant, stator iron loss: PFel=pFeIN * (U1/UIN) ²Wherein: the PFel-stator iron loss; The specified iron loss of pFeIN-stator; The specified terminal voltage of UIN-stator.As can be seen, along with U1 descends, PFel descends rapidly with a square ratio, and the iron loss that accounts for main loss like this when underloading, zero load reduces in a large number, and the operational efficiency of motor is improved greatly, the reason of Here it is underloading voltage-reducing and electricity-saving.Electricity-saving appliance is built-in power factor compensation device can power factor increase substantially, and can save very big reactive loss like this, generally can save about 30%, behind the large capacity equipment in the enterprise, can increase many new equipments and does not need dilatation.Above-described these electricity-saving functions utilize the micro-computer technology complete or collected works to be formed in one electricity-saving controller one, prolong 30% useful life of equipment simultaneously.This machine can automatically switch to the operation of normal power supply system if any fault, need not manual operation and adjustment.

Below in conjunction with drawings and Examples the utility model is further described in detail, but is not that the interest field that the utility model is claimed is confined in following examples.

Description of drawings

Fig. 1 is circuit control structure figure of the present utility model.

Embodiment

As shown in Figure 1, QF-air switch, KM-A.C. contactor, BIANPIN-frequency converter, LC-filter, the FU device that breaks, SB-button, FS-fan, D1-adjuster, SA-driving switch, HR-power frequency indicator light, HG-energy-saving indicating lamp, HY-malfunction indicator lamp, L1-phase line, N-zero line.

A kind of intelligent blower fan electricity-saving appliance, comprise cabinet, main loop circuit, the secondary control loop circuit, the adjusting supervisory circuit is formed, it is characterized in that: main loop circuit is by air switch QF, A.C. contactor KM1, A.C. contactor KM2, filter LC, frequency converter B IANPIN and lead are formed, three phase network 380V power supply is divided into two-way through the input wires terminal: the one tunnel links to each other with air switch QF through lead, the air switch QF other end links to each other with filter LC, the filter LC other end links to each other with frequency converter B IANPIN input, and frequency converter B IANPIN output links to each other with A.C. contactor KM2; Another road links to each other with A.C. contactor KM1 through lead, and the A.C. contactor KM1 other end links to each other with lead-out terminal with the A.C. contactor KM2 other end;

Secondary control loop circuit and adjusting supervisory circuit are made up of adjuster D1, fuse FU, button SB, fan FS, driving switch SA, indicator light (HR, HG, HY), frequency converter B IANPIN control terminal, ac contactor coil (KM1, KM2), normally-open normally-close contact and lead;

Phase line by lead, fusible link FU, driving switch SA, ac contactor coil KM1 with power frequency indicator light HR parallel connection, A.C. contactor KM2 is normally closed links to each other with zero line N;

Phase line by lead, fusible link FU, driving switch SA, ac contactor coil KM2 with power frequency indicator light HG parallel connection, A.C. contactor KM1 is normally closed links to each other with zero line N;

Phase line by lead, fusible link FU, A.C. contactor KM2 often open, fan machine FS links to each other with zero line N;

Phase line is often opened, is linked to each other with zero line N by the lead-out terminal able to programme of lead, fusible link FU, malfunction indicator lamp HY, frequency converter B IANPIN;

Adjuster D1, link to each other with the analog input terminal of frequency converter B IANPIN by lead.

Operation principle of the present utility model is:

1, to frequency converter input parameters needed, start-up time, acceleration and deceleration time, operational mode, display mode etc.According to user's request, select a suitable frequency again.

2, operation logic

1), bypass operational system: energy-conservation/bypass change over switch is got to the bypass gear, behind the input power supply, HR is bright for the bypass indicator light, contactor KM1 coil gets, make the main line power supply through power input terminal, enter bypath system main contactor K switch M1 and close a floodgate, directly skip power saving apparatus and enter output wiring terminal.This system mainly is when preventing that electricity-saving appliance from breaking down, and the operation that can work on of equipment blower fan does not influence production.

2), the power-saving running system: energy-conservation/bypass change over switch is got to energy-conservation gear, power-on, energy-saving indicating lamp HG is bright, contactor KM2 coil gets electric, through the conducting of KM2 normally opened contact, radiator fan FS must establish beginning operation by cable.This moment, the main line power supply was through the main power source protector air circuit QF of power input terminal to energy-saving mode; by air circuit QF after the filter filtering harmonic elimination; give the power supply of a cleaning of frequency converter B IANPIN of back; the harmonic wave that also prevents the back feeds back in the electrical network and depollutes; be input to frequency converter and carry out power output control, regulate the required best power of user by adjuster W.Arrive load through output wiring terminal.

Claims (1)

1. intelligent blower fan electricity-saving appliance, comprise cabinet, main loop circuit, the secondary control loop circuit, the adjusting supervisory circuit is formed, it is characterized in that: main loop circuit is by air switch QF, A.C. contactor KM1, A.C. contactor KM2, filter LC, frequency converter B IANPIN and lead are formed, three phase network 380V power supply is divided into two-way through the input wires terminal: the one tunnel links to each other with air switch QF through lead, the air switch QF other end links to each other with filter LC, the filter LC other end links to each other with frequency converter B IANPIN input, and frequency converter B IANPIN output links to each other with A.C. contactor KM2; Another road links to each other with A.C. contactor KM1 through lead, and the A.C. contactor KM1 other end links to each other with lead-out terminal with the A.C. contactor KM2 other end;

Secondary control loop circuit and adjusting supervisory circuit are made up of adjuster D1, fuse FU, button SB, fan FS, driving switch SA, indicator light (HR, HG, HY), frequency converter B IANPIN control terminal, ac contactor coil (KM1, KM2), normally-open normally-close contact and lead;

Phase line by lead, fusible link FU, driving switch SA, ac contactor coil KM1 with power frequency indicator light HR parallel connection, A.C. contactor KM2 is normally closed links to each other with zero line N;

Phase line by lead, fusible link FU, driving switch SA, ac contactor coil KM2 with power frequency indicator light HG parallel connection, A.C. contactor KM1 is normally closed links to each other with zero line N;

Phase line by lead, fusible link FU, A.C. contactor KM2 often open, fan machine FS links to each other with zero line N;

Phase line is often opened, is linked to each other with zero line N by the lead-out terminal able to programme of lead, fusible link FU, malfunction indicator lamp HY, frequency converter B IANPIN;

Adjuster D1, link to each other with the analog input terminal of frequency converter B IANPIN by lead.