CN104154604B - Outdoor unit control circuit of variable frequency air conditioner - Google Patents
Outdoor unit control circuit of variable frequency air conditioner Download PDFInfo
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- CN104154604B CN104154604B CN201410411929.3A CN201410411929A CN104154604B CN 104154604 B CN104154604 B CN 104154604B CN 201410411929 A CN201410411929 A CN 201410411929A CN 104154604 B CN104154604 B CN 104154604B
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Abstract
The invention discloses an outdoor unit control circuit of a variable frequency air conditioner. The outdoor unit control circuit of the variable frequency air conditioner comprises an outdoor power supply control loop, an outdoor unit power failure detection circuit, an outdoor unit charging control circuit and an outdoor environment and coiler temperature collecting circuit. The outdoor power supply control loop is used for controlling an outdoor unit to be powered on or powered off according to an external control signal. The outdoor unit power failure detection circuit is used for detecting whether a power failure of an outdoor unit power supply circuit is caused or not. The outdoor unit charging control circuit is used for charging a filter capacitor of the outdoor unit. The temperature collecting circuit is used for collecting the temperature of a coiler of an outdoor unit heat exchanger and the temperature of an outdoor environment and outputting collected analog signals. The outdoor unit control circuit of the variable frequency air conditioner has the advantages that an outdoor unit power failure can be detected, the outdoor unit can be controlled to be powered on or powered off, the stand-by time is shortened, energy is saved, and the work stability of the air conditioner is improved.
Description
Technical field
The present invention relates to a kind of off-premises station control circuit of transducer air conditioning.
Background technology
Existing convertible frequency air-conditioner, because of its power saving, the advantage such as comfortable, is increasingly favored by consumer.Existing convertible frequency air-conditioner
Device, needs to ensure the normal operation of indoor set and off-premises station by telecommunication circuit.Telecommunication circuit passes through photo-coupler, by interior
The signal that machine/off-premises station processor is assigned carries out opto-electronic conversion, then carries out electric signal transmission by holding wire, then passes through optocoupler
Clutch, the signal of telecommunication is carried out opto-electronic conversion, and off-premises station/indoor set processor receipt signal is simultaneously processed.But, indoor, room
Outward, middle connecting line tripartite either party damage, all will lead to air-conditioning cisco unity malfunction.
No matter from the operation logic of convertible frequency air-conditioner or from the perspective of it realizes structure, convertible frequency air-conditioner determines frequency than common
Air-conditioning will be complicated many.Thus, the fault rate of convertible frequency air-conditioner, especially electric-controlled plate is of a relatively high, maintenance difficult.
And because the electric-controlled plate specificity of convertible frequency air-conditioner is strong, price is of a relatively high, and network of maintenance and repair can not possibly have various types
Number electric-controlled plate, thus lead to break down to from convertible frequency air-conditioner electric-controlled plate being fully solved fault, often takes 15 days to one
Month.Greatly have impact on user to use.
Air-conditioning products are a kind of very strong consumer goodss of seasonality, it is difficult to find fault, using season during non-usage season
Section, after breaking down, user often wants to fix immediately, recovers to use, but due to due to aforementioned, user this require past
Toward meeting, cause user to complain, compromise product public praise.
How to improve reliability, lifting user's recognition rate and the comfortableness of variable frequency air-conditioner controller？How to ensure that user exists
Can be normally using convertible frequency air-conditioner when the hottest and the coldest？These problems annoying technical staff in the industry always, make frequency conversion
The behaviour in service of air-conditioner is not fully up to expectations.
Content of the invention
The present invention is for avoiding weak point present in above-mentioned prior art, providing a kind of off-premises station of transducer air conditioning
Control circuit, to effectively improve the reliability of convertible frequency air-conditioner, to ensure that user can be just when needing air-conditioning to greatest extent
Often use air-conditioning, the convenience improving convertible frequency air-conditioner maintenance and promptness.
The present invention is to solve technical problem to employ the following technical solutions.
The off-premises station control circuit of transducer air conditioning, it is structurally characterized in that, falls including outdoor power supply control loop, off-premises station
Power detection circuit, off-premises station charging control circuit and outdoor environment and coil temperature Acquisition Circuit；
Described outdoor power supply control loop, for controlling the connection of outdoor electromechanical source and cutting according to external control signal
Disconnected；
Described off-premises station power-fail detection circuit, for detecting the power supply circuits whether power down of off-premises station；
Described off-premises station charging control circuit, charges for the filter capacitor for off-premises station；
Described outdoor environment and coil temperature Acquisition Circuit, for gathering the coil temperature of outdoor unit heat exchanger, outdoor ring
Border temperature, and the analog signal output by collection；
Described outdoor power supply control loop includes relay ry1 and phase inverter u2；The l terminal of described relay ry1 connects
External power source, the out_l terminal of described relay ry1 connects off-premises station；The outfan also with described phase inverter for the described relay
It is connected with+12v power supply, the input termination external control signal input port of described phase inverter.
Described off-premises station power-fail detection circuit includes diode d1～diode d3, resistance r2～resistance r4 and electrochemical capacitor
ec2；The positive pole of described diode d1 is connected with the live wire acl of alternating current power supply, the positive pole of described diode d2 and alternating current power supply
Zero line acn be connected, the negative pole of described diode d1 be connected with the negative pole of described diode d2 after one end with resistance r2
It is connected, the other end of described resistance r2 is grounded by resistance r3；The negative pole of described diode d3 is connected with+5v power supply, institute
State diode d3 positive pole be connected with one end of described resistance r4 after be connected between described resistance r2 and resistance r3, described electricity
The other end of resistance r4 connects signal output；The positive pole of described electrochemical capacitor ec2 is connected with the positive pole of described diode d3, institute
The negative pole stating electrochemical capacitor ec2 connects the earth terminal of resistance r3.
The construction featuress of the off-premises station control circuit of the transducer air conditioning of the present invention lie also in:
Described off-premises station charging control circuit includes relay ry2, phase inverter u4, current-limiting resistance ptc, diode d5～bis-
Pole pipe d8, electrochemical capacitor ec3 and electrochemical capacitor ec4；The input of described phase inverter u4 connects external control signal input port, institute
The outfan stating phase inverter u4 is connected with relay ry2, the live wire also with+12v power supply, alternating voltage for the described relay ry2
Acl is connected, and the first end of described current-limiting resistance ptc is connected with the connection end of the live wire acl of relay ry2 and alternating voltage
Connect, the second end acl1 of described current-limiting resistance ptc is also connected on another terminal of relay；The positive pole of described diode d5
All it is connected with the second end acl1 of described current-limiting resistance ptc with the negative pole of diode d7, the positive pole and two of described diode d6
The negative pole of pole pipe d8 is all connected with the zero line acn of alternating current power supply；The negative pole of described diode d6 and the negative pole phase of diode d5
Be connected with the positive pole of electrochemical capacitor ec3 after connection, the positive pole of described diode d7 be connected with the positive pole of diode d8 after with
The negative pole of electrochemical capacitor ec3 is connected, and the negative pole of described electrochemical capacitor ec3 is simultaneously connected with earth terminal；Described electrochemical capacitor ec4's
Positive pole is connected with the positive pole of electrochemical capacitor ec3, and the negative pole of described electrochemical capacitor ec4 is connected with the negative pole of electrochemical capacitor ec3.
Described outdoor environment and coil temperature Acquisition Circuit include divider resistance r5, divider resistance r6, filter capacitor ec5,
Filter capacitor ec6, ntc critesistor rt2, ntc critesistor rt3；One end of described critesistor rt2 connects+5v power supply, institute
The other end stating critesistor rt2 connects central processing unit u3；Described divider resistance r5 and filter capacitor ec5 is in parallel after connection
One end be connected between described critesistor rt2 and central processing unit u3, described divider resistance r5 and filter capacitor ec5 phase are simultaneously
The other end after connection connects is grounded；
One end of described critesistor rt3 connects+5v power supply, and the other end of described critesistor rt3 connects central authorities and processes
Device u3；Described divider resistance r6 and filter capacitor ec6 be in parallel connect after one end be connected to described critesistor rt3 and central authorities
Between processor u3, described divider resistance r6 and filter capacitor ec6 be in parallel connect after the other end ground connection.
Compared with the prior art, the present invention has the beneficial effect that:
The off-premises station control circuit of the transducer air conditioning of the present invention, including outdoor power supply control loop, off-premises station power down inspection
Slowdown monitoring circuit, off-premises station charging control circuit and temperature collection circuit, have following technical characterstic.
1st, the present invention, due to being provided with outdoor power supply control loop, makes the stand-by power consumption of convertible frequency air-conditioner greatly reduce, and saves
The energy；
2nd, the present invention is due to being provided with outdoor power supply control loop so that air-conditioning can be operated in normal work, tape jam
Work, communication 3 kinds of mode of operations of lost contact work are possibly realized, and the control mode of 3 kinds of mode of operations substantially prolongs air-conditioner
Operable time, solve common air-conditioning and once go wrong, the drawbacks of just cannot working, greatly improve expiring of client
Meaning rate, it might even be possible to replace convertible frequency air-conditioner interior plate using it is also possible to frequency conversion using fixed-frequency control plate in the case of emergency
Indoor plate replaces determining frequency electric-controlled plate for fixed frequency air conditioner, improves the versatility of electric-controlled plate, not only can improve convertible frequency air-conditioner
The satisfaction rate of user it is also possible to improve the satisfaction rate of fixed frequency air conditioner user, can fast lifting brand public praise.
3rd, the present invention due to when employing upper electricity indoor set read and the related eeprom parameter of outdoor configuration from off-premises station
Mode so that indoor electric-controlled plate can be matched with any outdoor electric-controlled plate, form perfect closed loop control so that room
Outer machine modularity, solves a kind of corresponding predicament of new electric-controlled plate of common one system requirements of transducer air conditioning so that this invents
The suitability of control circuit and composability greatly reinforce, greatly shorten product development cycle.
4th, the present invention is supplied by outdoor due to being provided with off-premises station power-fail detection circuit, outdoor ptc control circuit, the present invention
Electrical relay, once disconnecting, need to be spaced the function setting that m minute just can be again turned on, and solves common convertible frequency air-conditioner outdoor power supply
Control circuit is simple, the flimsy disadvantage of electric-controlled plate.
5th, the air-conditioner of the present invention is stable and reliable in work, the widening of the product market that is highly advantageous to.
6th, the present invention does not change the system structure of existing transducer air conditioning, can be real by the suitable adjustment of control circuit
Now it is easy to implement.
The off-premises station control circuit of the transducer air conditioning of the present invention, has and off-premises station power down can be detected and controlled outdoor
The advantages of power supply break-make of machine, the stand-by time energy saving that reduces, job stability of raising air-conditioner.
Brief description
Fig. 1 is the refrigeration system schematic diagram of the transducer air conditioning of off-premises station control circuit of the setting present invention.
Fig. 2 is the outdoor power supply control circuit theory figure of the present invention.
Fig. 3 is the indoor coil sensor temperature Acquisition Circuit schematic diagram of the present invention.
Fig. 4 is the rotation speed of the fan and vs. temperature figure during the indoor set communication lost contact work of the present invention.
Fig. 5 is the off-premises station power-fail detection circuit schematic diagram of the present invention.
Fig. 6 is the off-premises station charging control circuit schematic diagram of the present invention.
Fig. 7 is the outdoor environment of the present invention, coil pipe sensor temperature Acquisition Circuit schematic diagram.
It is numbered in accompanying drawing 1: 1 compressor, 2 outdoor unit heat exchangers, 3 aerofoil fans, 4 indoor set heat exchangers, 5
One capillary tube, 6 axial-flow fans, 7 cross valves, 8 electric heaters, 9 gas-liquid separators, 10 check valves, 11 first stop valves, 12
Second stop valve, 13 second capillary tubies.
Below by way of specific embodiment, and the invention will be further described to combine accompanying drawing.
Specific embodiment
Referring to Fig. 1-7, the off-premises station control circuit of the transducer air conditioning of the present invention, including outdoor power supply control loop, room
Outer machine power-fail detection circuit, off-premises station charging control circuit and outdoor environment and coil temperature Acquisition Circuit；
Described outdoor power supply control loop, for controlling the connection of outdoor electromechanical source and cutting according to external control signal
Disconnected；
Described off-premises station power-fail detection circuit, for detecting the power supply circuits whether power down of off-premises station；
Described off-premises station charging control circuit, charges for the filter capacitor for off-premises station；
Described outdoor environment and coil temperature Acquisition Circuit, for gathering the coil temperature of outdoor unit heat exchanger, outdoor ring
Border temperature, and the analog signal output by collection；
Described outdoor power supply control loop includes relay ry1 and phase inverter u2；The l terminal of described relay ry1 connects
External power source, the out_l terminal of described relay ry1 connects off-premises station；The outfan also with described phase inverter for the described relay
It is connected with+12v power supply, the input termination external control signal input port of described phase inverter.If Fig. 2 is that outdoor power supply control returns
The circuit diagram on road, described phase inverter is connected with the central processing unit u1 of indoor unit control circuit plate.By central processing unit u1 root
Export low and high level according to control logic, using phase inverter u2 and relay ry1 as executive component.Central processing unit u1 is according to control
Require, export high level, via phase inverter u2 anti-phase after be changed into low level, be jointly applied to relay ry1 line with+12v voltage
The two ends of circle, relay ry1 contact adhesive, power supply l exports to out_l, and off-premises station obtains electric；When central processing unit u1 exports low electricity
Flat, via phase inverter u2 anti-phase after be changed into high level, the voltage difference at relay ry1 coil two ends eliminates, and breaks in relay ry1 contact
Open, outdoor power path is cut off, and off-premises station power-off, thus control whether to power to off-premises station.
Described off-premises station power-fail detection circuit includes diode d1～diode d3, resistance r2～resistance r4 and electrochemical capacitor
ec2；The positive pole of described diode d1 is connected with the live wire acl of alternating current power supply, the positive pole of described diode d2 and alternating current power supply
Zero line acn be connected, the negative pole of described diode d1 be connected with the negative pole of described diode d2 after one end with resistance r2
It is connected, the other end of described resistance r2 is grounded by resistance r3；The negative pole of described diode d3 is connected with+5v power supply, institute
State diode d3 positive pole be connected with one end of described resistance r4 after be connected between described resistance r2 and resistance r3, described electricity
The other end of resistance r4 connects signal output；The positive pole of described electrochemical capacitor ec2 is connected with the positive pole of described diode d3, institute
The negative pole stating electrochemical capacitor ec2 connects the earth terminal of resistance r3.
Off-premises station power-fail detection circuit is as shown in figure 5, the other end of described resistance r4 connects off-premises station control board
Central processing unit u3, and voltage signal is exported to central processing unit u3.Input electricity is exchanged to outdoor by diode d1 with d2
The rectification respectively of the positive-negative half-cycle of pressure, through resistance r2 and r3 partial pressure, electrochemical capacitor ec2 smothing filtering, inputs after resistance r4 current limliting
To the ad mouth of central processing unit u3, diode d3 is set and is used for clamper, prevent input voltage too high, damage central processing unit u3,
The analogue signal collecting is converted into data signal by central processing unit u3, as the judgement of off-premises station power supply circuits whether power down
Foundation.
Described off-premises station charging control circuit includes relay ry2, phase inverter u4, current-limiting resistance ptc, diode d5～bis-
Pole pipe d8, electrochemical capacitor ec3 and electrochemical capacitor ec4；The input of described phase inverter u4 connects external control signal input port, institute
The outfan stating phase inverter u4 is connected with relay ry2, the live wire also with+12v power supply, alternating voltage for the described relay ry2
Acl is connected, and the first end of described current-limiting resistance ptc is connected with the connection end of the live wire acl of relay ry2 and alternating voltage
Connect, the second end acl1 of described current-limiting resistance ptc is also connected on another terminal of relay；The positive pole of described diode d5
All it is connected with the second end acl1 of described current-limiting resistance ptc with the negative pole of diode d7, the positive pole and two of described diode d6
The negative pole of pole pipe d8 is all connected with the zero line acn of alternating current power supply；The negative pole of described diode d6 and the negative pole phase of diode d5
Be connected with the positive pole of electrochemical capacitor ec3 after connection, the positive pole of described diode d7 be connected with the positive pole of diode d8 after with
The negative pole of electrochemical capacitor ec3 is connected, and the negative pole of described electrochemical capacitor ec3 is simultaneously connected with earth terminal；Described electrochemical capacitor ec4's
Positive pole is connected with the positive pole of electrochemical capacitor ec3, and the negative pole of described electrochemical capacitor ec4 is connected with the negative pole of electrochemical capacitor ec3.
Off-premises station charging control circuit is as shown in fig. 6, second end of described current-limiting resistance ptc is designated as acl1.Central authorities are processed
Device u3 exports low and high level according to control logic, using phase inverter u4 and relay ry2 as executive component.
During initial power-on, central processing unit u3 export low level, via phase inverter u4 anti-phase after be changed into high level, relay
The voltage difference at ry2 coil two ends eliminates, and relay ry2 contact disconnects, and acl is after semistor ptc current limliting
Supply acl1.AC-input voltage carries out all wave rectification by diode d5-d8, charges to smothing filtering electric capacity ec3, ec4, by
Generate heat after the characteristic of ptc, a period of time, resistance becomes big, and charging current can be less and less, and smothing filtering electric capacity ec3, ec4 are
Be filled substantially with, now, central processing unit u3 according to control require, export high level, via phase inverter u4 anti-phase after be changed into low electricity
Flat, jointly it is applied to the two ends of relay ry2 coil, relay ry2 contact adhesive with 12v voltage, power supply acl directly connects
Acl1, prevents the high current at charging initial stage, the sparking that causes, flashover, damages smothing filtering electric capacity ec3, ec4, before preventing from damaging
The outdoor supply relay ry1 stating.When in the normal operation of air-conditioning, during the situation meeting power-off of dashing forward, due to the characteristic of capacitance energy storage, in
The supply voltage of central processor u3 can keep more than ten seconds just disappearing.When central processing unit u3 is according to aforementioned off-premises set detection of power loss
Electric circuit inspection, to after off-premises station power down, also exports low level, block system relay ry2 contact immediately, prevents after power-off due to smooth
Electric capacity on filter capacitor ec3, ec4 can maintain a period of time, and central processing unit u3 still has electricity, closes in the course of the work
Relay ry2 contact is not turned off, if going up electricity immediately, without the protection of current-limiting resistance ptc, it is right that the high current brought causes
The damage of circuit.Fig. 5 and Fig. 6 constitutes complete off-premises station detection of power loss and charging control circuit.
Described outdoor environment and coil temperature Acquisition Circuit include divider resistance r5, divider resistance r6, filter capacitor ec5,
Filter capacitor ec6, ntc critesistor rt2, ntc critesistor rt3；One end of described critesistor rt2 connects+5v power supply, institute
The other end stating critesistor rt2 connects central processing unit u3；Described divider resistance r5 and filter capacitor ec5 is in parallel after connection
One end be connected between described critesistor rt2 and central processing unit u3, described divider resistance r5 and filter capacitor ec5 phase are simultaneously
The other end after connection connects is grounded；
One end of described critesistor rt3 connects+5v power supply, and the other end of described critesistor rt3 connects central authorities and processes
Device u3；Described divider resistance r6 and filter capacitor ec6 be in parallel connect after one end be connected to described critesistor rt3 and central authorities
Between processor u3, described divider resistance r6 and filter capacitor ec6 be in parallel connect after the other end ground connection.
Fig. 3 is indoor coil pipe Acquisition Circuit, and the coil temperature sensor rt1 of setting indoor machine evaporation, with described
The temperature detection signal of coil temperature sensor rt1 is as the changeover control signal of outdoor motor different rotating speeds shelves.Described interior
Coil temperature Acquisition Circuit includes ntc critesistor rt1, divider resistance r1 and filter capacitor ec1；Described critesistor rt1's
One end connects+5v power supply, and the other end of described critesistor rt1 connects central processing unit u1；Described divider resistance r1 and filtering
Electric capacity ec1 be in parallel connect after one end be connected between described critesistor rt1 and central processing unit u1, described divider resistance
R1 and filter capacitor ec1 be in parallel connect after the other end ground connection.
According to Fig. 3, by arranging coil temperature sensor on machine heat exchanger indoors, 5v voltage passes through ntc temperature-sensitive
Resistance and r1 partial pressure, ec1 shaping, voltage stabilizing, the change of ntc critesistor rt1 resistance is converted to change in voltage, exports unidirectional current
Pressure signal is to the ad mouth of central processing unit u1.Central processing unit u1 is by perceive interior and to change to the ad conversion of this voltage, collection
The change of hot device temperature, as one of the control parameter of whole air-conditioner.Outer communication lost contact indoors, in the case of air-conditioning heating,
When heat exchange temperature changes, according to the temperature of Fig. 4 -- rotating speed transformational relation figure, the rotating speed of indoor motor is controlled, from
And the many rotating speeds realizing indoor motor control.When temperature is raised, less than or equal to temp1, indoor fan rotating speed is fi0, greatly
When temp1, indoor fan rotating speed not more than fi1, during more than temp2, indoor fan rotating speed not more than fi2, greatly
When temp3, indoor fan rotating speed is pressed user and is set work；When upon a drop in temperature, more than temp2, indoor fan rotating speed is pressed
User sets work, during more than temp1, indoor fan rotating speed not more than fi2, and during more than temp0, indoor fan rotating speed is
Height is less than fi1, and during less than or equal to temp0, indoor fan rotating speed is fi0.
In being embodied as, more gear outdoor motor rotating speed can also be set again, according to temperature change, low in coil temperature
When, reduce rotating speed, even switch off indoor fan, prevent indoors under the heating mode of outer lost contact situation, when off-premises station defrosts
Cold wind blows out, and causes the discomfort of human body.When coil temperature rises, lift rotating speed, reach the purpose of lifting heating capacity.
Shown in Fig. 7, by arranging coil temperature sensor on environment and heat exchanger in off-premises station, 5v voltage is by ntc warm
Quick resistance rt2 and r5 partial pressure, ec5 shaping, voltage stabilizing；Rt3 and r6 partial pressure, ec6 shaping, voltage stabilizing, by ntc critesistor rt2, rt3
The change of resistance is converted to change in voltage, the ad mouth of output d. c. voltage signal to u3.Cpu by changing to the ad of this voltage,
Collection perceiving the change of outdoor environment, heat exchanger coils temperature, thus as under lost contact pattern, the heating and defrosting of off-premises station
Enter judgment basis.Setting outdoor environment temperature sensor rt2, with the temperature detection of described outdoor environment temperature sensor rt2
Signal is as the mode conversion control signal after indoor and outdoor communication lost contact.The coil temperature sensor of setting outdoor unit heat exchanger
Rt3, with the temperature detection letter of the temperature detection signal of described coil temperature sensor rt3 and outdoor environment temperature sensor rt2
Number difference as off-premises station defrosting control signal.
The off-premises station control circuit of the transducer air conditioning of the present invention, is also provided with plug type mnemonic eeprom,
Electric-controlled plate and the individual described pluggable eeprom of outdoor automatically controlled upper setting 2-3 indoors, deposit respectively indoor system control parameters,
Outdoor system control parameter and outdoor press drive parameter.The related control parameter of outdoor system is placed on off-premises station eeprom
In, after energising, indoor set reads the system control parameters of off-premises station.It is because different off-premises stations, compression in this way
Systematic parameter corresponding to machine is different, and this partial parameters is placed in outdoor eeprom, can greatly improve indoor panel
Versatility.
As Fig. 1, transducer air conditioning includes indoor set, off-premises station, refrigeration system and corresponding control circuit and constitutes；, institute
State indoor set and include indoor set heat exchanger 4, electric heater 8 and axial-flow fan 6；One end of described indoor set heat exchanger 4 is connected with
One stop valve 11, the other end of described indoor set heat exchanger 4 is connected with the second stop valve 12；Described off-premises station includes off-premises station
Heat exchanger 2, compressor 1, aerofoil fan 3, the first capillary tube 5, cross valve 7, gas-liquid separator 9 and check valve 10.
Low pressure in refrigeration system, low-temperature refrigerant steam are sucked by compressor 1, compressed for high pressure, high temperature overheated
Steam heel row is to outdoor unit heat exchanger 2；The outdoor air that outdoor side axial 3 sucks simultaneously flows through outdoor unit heat exchanger 2, band
Walk cold-producing medium liberated heat, make the refrigerant vapour of high pressure, high temperature be condensed into highly pressurised liquid.Highly pressurised liquid is through throttling capillary
Pipe 5 blood pressure lowering cooling flows into indoor set heat exchanger 4, and evaporates under corresponding low pressure, draws ambient heat；Indoor fan simultaneously
6 make room air constantly get between the fin of machine heat exchanger 4 carries out heat exchange, and the gas turning cold after heat release is sent to
Indoor.So, indoor and outdoor air constantly circulates, and reduces the purpose of temperature.When heating, using the compression of refrigeration system
Condensation heat comes heating indoor air, low pressure, low-temperature refrigerant liquid evaporation endothermic in vaporizer, and high-temperature high-pressure refrigerant
Gas exothermic condensation in condenser.Change the loop direction of cold-producing medium when heat pump heats by cross valve 7, make originally to freeze
During work, the indoor set heat exchanger as vaporizer becomes the room during condenser, originally refrigeration work when heating as condenser
Outer machine heat exchanger becomes vaporizer when heating, and such refrigeration system, in outdoor heat absorption, indoor heat release, realizes the purpose heating.
Described compressor 1 is connected with the first port of described cross valve 7, the second port of described cross valve 7 with described
First stop valve 11 is connected, and the 3rd port of described cross valve 7 is connected with described gas-liquid separator 9, described cross valve 7
4th port is connected with one end of described outdoor unit heat exchanger 2, the other end of described outdoor unit heat exchanger 2 with described first mao
One end of tubule 5 is connected, and the other end of described first capillary tube 5 is connected with one end of described check valve 10, described unidirectional
The other end of valve 10 is connected with described second stop valve 12；The side of described outdoor unit heat exchanger 2 is provided with aerofoil fan 3；
The motor of the motor of described axial-flow fan 6 and described aerofoil fan 3 is brshless DC motor；The axial-flow fan of described indoor set
The motor of the aerofoil fan 3 of 6 motor and described off-premises station is controlled by two pieces of panels respectively.
Described off-premises station also includes the second capillary tube 13；Described check valve 10 is in parallel with the second capillary tube 13 and is connected.
If Fig. 1 is the transducer air conditioning of the control circuit being provided with the present invention, by indoor set, off-premises station, refrigeration system with
And control circuit is constituted accordingly.During refrigeration, the low pressure in refrigeration system, low-temperature refrigerant steam are sucked by compressor 1, through pressure
The superheated steam heel row being condensed to high pressure, high temperature is to outdoor unit heat exchanger 2；The outdoor air that outside fan 3 sucks simultaneously flows through
Outdoor unit heat exchanger 2, takes away cold-producing medium liberated heat, makes the refrigerant vapour of high pressure, high temperature be condensed into highly pressurised liquid.High pressure
Liquid is lowered the temperature through the first capillary tube 5 blood pressure lowering and is flowed into indoor set heat exchanger 4, and evaporates under corresponding low pressure, draws surrounding heat
Amount；Indoor fan 6 makes room air constantly get in carry out heat exchange between the fin of machine heat exchanger 4 simultaneously, and by heat release
The gas turning cold afterwards is sent to interior.So, indoor and outdoor air constantly circulates, and reduces the purpose of temperature.When heating,
Using refrigeration system compression condensation heat come heating indoor air, low pressure, low-temperature refrigerant liquid evaporate suction in vaporizer
Heat, and high-temperature high-pressure refrigerant gas exothermic condensation in condenser.When heat pump heats, cold-producing medium is changed by cross valve 7
Loop direction, makes the indoor set heat exchanger as vaporizer during original refrigeration work become condenser when heating, originally freezes
During work, the outdoor unit heat exchanger as condenser becomes vaporizer when heating, and such refrigeration system is in outdoor heat absorption, indoor
Heat release, realizes the purpose heating.Electric heater 8 is used for as assisted heating device.
Indoor and outdoor blower fan all using DC brushless motor, is controlled by two pieces of panels respectively, by closed loop control, makes
Motor speed controls stable and not influence by voltage, and noise is little；High temperature heats, under low-temperature heating operating mode, air-conditioner heat effect
Fruit is more preferably.Outdoor motor using single control circuit so that the fixed rotating speed of outdoor motor and adjustable rotating speed can arbitrarily switch,
Again can be when closed loop rotation speed control loop damage, outdoor fan continues normal work.
As described above, a kind of off-premises station control circuit of present invention transducer air conditioning has been described with reference to the drawings, but this
Bright can not example described in this specification and accompanying drawing limit, one of ordinary skill in the art is in the technological thought of the present invention
Various deformation example can be proposed in protection domain.
Claims (2)
1. the off-premises station control circuit of transducer air conditioning, is characterized in that, including outdoor power supply control loop, off-premises station detection of power loss
Circuit, off-premises station charging control circuit and outdoor environment and coil temperature Acquisition Circuit；
Described outdoor power supply control loop, for controlling being switched on and off of outdoor electromechanical source according to external control signal；
Described off-premises station power-fail detection circuit, for detecting the power supply circuits whether power down of off-premises station；
Described off-premises station charging control circuit, charges for the filter capacitor for off-premises station；
Described outdoor environment and coil temperature Acquisition Circuit, for gathering coil temperature, the outdoor environment temperature of outdoor unit heat exchanger
Degree, and by the analog signal output of collection to central processing unit u3；
Described power supply control loop includes relay ry1 and phase inverter u2；The l terminal of described relay ry1 connects external power source,
The out_l terminal of described relay ry1 connects off-premises station；Outfan and+12v power supply also with described phase inverter for the described relay
It is connected, the input termination external control signal input port of described phase inverter；
Described off-premises station power-fail detection circuit includes diode d1～diode d3, resistance r2～resistance r4 and electrochemical capacitor ec2；
The positive pole of described diode d1 is connected with the live wire acl of alternating current power supply, the positive pole of described diode d2 and the zero of alternating current power supply
Line acn is connected, and the negative pole of described diode d1 is connected with one end of resistance r2 after being connected with the negative pole of described diode d2
Connect, the other end of described resistance r2 is grounded by resistance r3；The negative pole of described diode d3 is connected with+5v power supply, and described two
The positive pole of pole pipe d3 is connected to after being connected with one end of described resistance r4 between described resistance r2 and resistance r3, described resistance r4
The other end connect signal output；The positive pole of described electrochemical capacitor ec2 is connected with the positive pole of described diode d3, described electricity
The negative pole of solution electric capacity ec2 connects the earth terminal of resistance r3；
Described off-premises station charging control circuit includes relay ry2, phase inverter u4, current-limiting resistance ptc, diode d5～diode
D8, electrochemical capacitor ec3 and electrochemical capacitor ec4；The input of described phase inverter u4 connects external control signal input port, described anti-
The outfan of phase device u4 is connected with relay ry2, the live wire acl phase also with+12v power supply, alternating voltage for the described relay ry2
Connect, the first end of described current-limiting resistance ptc is connected with the connection end of the live wire acl of relay ry2 and alternating voltage, described
The second end acl1 of current-limiting resistance ptc is also connected on another terminal of relay；The positive pole of described diode d5 and two poles
The negative pole of pipe d7 is all connected with the second end acl1 of described current-limiting resistance ptc, the positive pole of described diode d6 and diode d8
Negative pole be all connected with the zero line acn of alternating current power supply；After the negative pole of described diode d6 is connected with the negative pole of diode d5
It is connected with the positive pole of electrochemical capacitor ec3, the positive pole of described diode d7 is electric with electrolysis after being connected with the positive pole of diode d8
The negative pole holding ec3 is connected, and the negative pole of described electrochemical capacitor ec3 is simultaneously connected with earth terminal；The positive pole of described electrochemical capacitor ec4 with
The positive pole of electrochemical capacitor ec3 is connected, and the negative pole of described electrochemical capacitor ec4 is connected with the negative pole of electrochemical capacitor ec3.
2. the off-premises station control circuit of transducer air conditioning according to claim 1, is characterized in that, described outdoor environment and disk
Pipe temperature collection circuit includes divider resistance r5, divider resistance r6, filter capacitor ec5, filter capacitor ec6, ntc critesistor
Rt2, ntc critesistor rt3；One end of described critesistor rt2 connects+5v power supply, and the other end of described critesistor rt2 is even
Meet central processing unit u3；The described divider resistance r5 and filter capacitor ec5 one end after connecting that is in parallel is connected to described temperature-sensitive electricity
Resistance rt2 and central processing unit u3 between, described divider resistance r5 and filter capacitor ec5 be in parallel connect after the other end ground connection；
One end of described critesistor rt3 connects+5v power supply, and the other end of described critesistor rt3 connects central processing unit u3；
Described divider resistance r6 and filter capacitor ec6 be in parallel connect after one end be connected to described critesistor rt3 and central authorities process
Between device u3, described divider resistance r6 and filter capacitor ec6 be in parallel connect after the other end ground connection.
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| CN104883111B (en) * | 2015-06-25 | 2017-09-22 | 珠海格力电器股份有限公司 | Motor control method, device and electric system |
| CN108278712B (en) * | 2017-01-04 | 2020-10-09 | 奥克斯空调股份有限公司 | Power supply control method for preheating of variable frequency compressor |
| CN107547109B (en) | 2017-08-04 | 2021-05-25 | 广东美的制冷设备有限公司 | Air conditioner current loop communication circuit and air conditioner |
| US11781776B2 (en) * | 2018-04-18 | 2023-10-10 | Mitsubishi Electric Corporation | Control substrate and indoor equipment of air conditioner |
| CN108931041B (en) * | 2018-08-16 | 2023-11-28 | 广州华凌制冷设备有限公司 | Electric control assembly and air conditioner |
| CN108931040B (en) * | 2018-08-16 | 2023-11-28 | 广州华凌制冷设备有限公司 | Electric control assembly and air conditioner |
| CN111239460B (en) * | 2018-11-28 | 2022-02-11 | 广东威灵汽车部件有限公司 | Sampling circuit and electrical equipment |
| CN110762808A (en) * | 2019-10-31 | 2020-02-07 | 广东美的制冷设备有限公司 | Drive control circuit and air conditioner |
| CN111239510B (en) * | 2019-12-30 | 2022-07-12 | 宁波奥克斯电气股份有限公司 | Self-service test method and test system for EMC of air conditioner |
| CN111023441B (en) * | 2019-12-30 | 2021-08-24 | Tcl空调器(中山)有限公司 | Air conditioner control method and system, storage medium and air conditioner |
| CN111600288A (en) * | 2020-05-14 | 2020-08-28 | 浙江达峰科技有限公司 | Back electromotive force discharge system and method for direct-current variable-frequency drum washing machine |
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Address after: 239000 No. 588, Shanghai Road, Chengdong Industrial Park, Anhui, Chuzhou Patentee after: Anhui Yangzi Air Conditioning Co., Ltd Address before: 239000 No. 588, Shanghai Road, Chengdong Industrial Park, Anhui, Chuzhou Patentee before: CHINA YANGZI GROUP CHUZHOU YANGZI AIR CONDITIONER Co.,Ltd. |
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