CN106864203B - A kind of control method for frequency conversion air conditioner and system - Google Patents
A kind of control method for frequency conversion air conditioner and system Download PDFInfo
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- CN106864203B CN106864203B CN201710131371.7A CN201710131371A CN106864203B CN 106864203 B CN106864203 B CN 106864203B CN 201710131371 A CN201710131371 A CN 201710131371A CN 106864203 B CN106864203 B CN 106864203B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3269—Cooling devices output of a control signal
- B60H2001/327—Cooling devices output of a control signal related to a compressing unit
- B60H2001/3272—Cooling devices output of a control signal related to a compressing unit to control the revolving speed of a compressor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3286—Constructional features
- B60H2001/3292—Compressor drive is electric only
Abstract
The present invention relates to air-conditioning technical fields, and in particular to a kind of control method for frequency conversion air conditioner and system.This method comprises: after air-conditioning booting operation；It is whether normal that air-conditioning pressure duct pressure is detected by pressure switch；If normal, starting request is sent to compressor control module, so that the compressor control module starts motor compressor；Expansion core temperature and outdoor temperature are obtained respectively, and evaporation target value is arranged according to the outdoor temperature；According to the expansion core temperature and the evaporation target value, motor compressor revolving speed is set；The motor compressor revolving speed is sent to the compressor control module, so that the compressor control module controls the motor compressor and runs by the motor compressor revolving speed.Through the invention, the frequency conversion campaign of motor compressor is simply and reliably realized.
Description
Technical field
The present invention relates to air-conditioning technical fields, and in particular to a kind of control method for frequency conversion air conditioner and system.
Background technique
With the development of society and the support of national policy, there is the growth of blowout, while state in pure electric automobile industry
The five continuous upgradings that even state six discharges are required with phase III oil consumption, and nearly all enterprise all has competitiveness in research and development of going all out
New energy vehicle.Battery durable problem is the maximum obstruction met with during electric car is promoted, air-conditioning in country's electric car at present
The power consumption of system should not be underestimated in vehicle power consumption accounting, so many producers use heat pump techniques to reduce energy consumption, but cost at present
It is higher, and there is part problem to need to solve.And most of air-conditioning systems still use the mentality of designing of conventional fuel oil car, heating uses
PTC, cooling match original system using motor compressor.Under the premise of vehicle constantly promotes cruising ability, air-conditioning system is needed
System carries out energy conservation measure, reduces electricity and uses.
Existing air conditioner system control method are as follows: when pressing air-conditioning AC button and normal system pressure, pressure switch conducting,
Compressor start request is sent to full-vehicle control unit, full-vehicle control unit receives signal driving compressor constant speed rotation；It presses
According to current control, compressor of air conditioner only receives to start and stop signal to realize constant speed drive；Since a revolving speed is transported for a long time
Row, in the case where needing refrigerating capacity small in the case where small for thermic load, compressor is also to maintain high revolving speed operation, causes to press
The waste of contracting mechanism cooling capacity, power wastage influence electricity and the continuation of the journey of vehicle.
Summary of the invention
The present invention provides a kind of control method for frequency conversion air conditioner and systems, simply and reliably to realize motor compressor
Frequency conversion campaign.
To achieve the goals above, the present invention provides the following technical scheme that
A kind of control method for frequency conversion air conditioner, which comprises
After air-conditioning booting operation, it is whether normal that air-conditioning pressure duct pressure is detected by pressure switch；
If normal, starting request is sent to compressor control module, so that compressor control module starting is electronic
Compressor；
Expansion core temperature and outdoor temperature are obtained respectively, and evaporation target value is arranged according to the outdoor temperature；
According to the expansion core temperature and the evaporation target value, motor compressor revolving speed is set；
The motor compressor revolving speed is sent to the compressor control module, so that the compressor control module control
The motor compressor is made to run by the motor compressor revolving speed.
Preferably, described to include: according to outdoor temperature setting evaporation target value
When the outdoor temperature is less than or equal to the first temperature value, setting evaporation target value is first object value；
When the outdoor temperature is greater than first temperature value and is less than or equal to second temperature value, setting evaporation target value
Are as follows: outdoor temperature-first object value described in the first setting coefficient *, first temperature value are less than the second temperature value；
When the outdoor temperature is greater than the second temperature value and is less than or equal to third temperature value, setting evaporation target value
For the second target value, the second temperature value is less than the third temperature value；
When the outdoor temperature is greater than the third temperature value and is less than or equal to four temperature values, setting evaporation target value
Are as follows: first setting coefficient * (outdoor temperature-third target value)+first object value, the third temperature value are less than described the
Four temperature values；
When the outdoor temperature is greater than four temperature value, setting evaporation target value is first object value.
Preferably, described that motor compressor revolving speed packet is arranged according to the expansion core temperature and the evaporation target value
It includes:
It makes the difference the expansion core temperature and the evaporation target value to obtain temperature difference；
According to the temperature difference, the motor compressor revolving speed is set.
Preferably, described to include: according to the temperature difference setting motor compressor revolving speed
When the temperature difference is less than five temperature values, it is 0 that the motor compressor revolving speed, which is arranged,；
When the temperature difference is more than or equal to the 5th temperature value and when less than six temperature values, the motor compressor is set and is turned
Speed is the first tachometer value, and the 5th temperature value is less than the 6th temperature value；
When the temperature difference is more than or equal to the 6th temperature value and when less than seven temperature values, the electric compressor is set
Machine revolving speed are as follows: the+the second tachometer value of temperature difference described in the second setting coefficient *, the 6th temperature value are less than the 7th temperature value；
When the temperature difference is more than or equal to seven temperature values, it is third tachometer value that the motor compressor revolving speed, which is arranged,.
Preferably, the method also includes:
If the air-conditioning pressure duct pressure is normal, detect whether pressure duct pressure reaches by the pressure switch
Middle pressure；If so, high-speed cruising request is sent to entire car controller by CAN bus, so that the vehicle control unit controls the
One fan and the second fan parallel operation；Otherwise, low speed operation request is sent to entire car controller by CAN bus, so that institute
State the first fan described in vehicle control unit controls and the second fan tandem working.
A kind of Control Method of Inverter Air Conditioner, comprising: motor compressor, air-conditioner controller and with air-conditioner controller electricity
Pressure switch, evaporator temperature sensor, the compressor control module of connection, the compressor control module and the electronic pressure
Contracting mechatronics；Further include: the outdoor temperature sensor being electrically connected with the air-conditioner controller；The air-conditioner controller is in air-conditioning
After booting operation, it is whether normal that air-conditioning pressure duct pressure is detected by the pressure switch；If normal, Xiang Suoshu compressor
Control module sends starting request, so that the compressor control module starts the motor compressor；The air-conditioner controller
Expansion core temperature is obtained by the evaporator temperature sensor and is obtained by the outdoor temperature sensor outdoor
Temperature, and evaporation target value is arranged according to the outdoor temperature；The air-conditioner controller according to the expansion core temperature with
Motor compressor revolving speed is arranged in the evaporation target value；The motor compressor revolving speed is sent to described by the air-conditioner controller
Compressor control module, so that the compressor control module controls the motor compressor and transports by the motor compressor revolving speed
Row.
Preferably, after the air-conditioner controller obtains outdoor temperature by outdoor temperature sensor, if the outdoor temp
Degree is less than or equal to the first temperature value, and setting evaporation target value is first object value；
If the outdoor temperature is greater than first temperature value and is less than or equal to second temperature value, setting evaporation target value
Are as follows: outdoor temperature-first object value described in the first setting coefficient *, first temperature value are less than the second temperature value；
If the outdoor temperature is greater than the second temperature value and is less than or equal to third temperature value, setting evaporation target value
For the second target value, the second temperature value is less than the third temperature value；
If the outdoor temperature is greater than the third temperature value and is less than or equal to the 4th temperature value, setting evaporation target value
Are as follows: first setting coefficient * (outdoor temperature-third target value)+first object value, the third temperature value are less than described the
Four temperature values；
If the outdoor temperature is greater than the 4th temperature value, setting evaporation target value is first object value.
It preferably, will be described after the air-conditioner controller obtains expansion core temperature by evaporator temperature sensor
Expansion core temperature and the evaporation target value make the difference to obtain temperature difference；According to the temperature difference, the motor compressor is set
Revolving speed.
Preferably, the air-conditioner controller is after obtaining temperature difference, if the temperature difference is less than the 5th temperature value, setting
The motor compressor revolving speed is 0；
If the temperature difference is more than or equal to the 5th temperature value and less than the 6th temperature value, the motor compressor is set and is turned
Speed is the first tachometer value, and the 5th temperature value is less than the 6th temperature value；
If the temperature difference is more than or equal to the 6th temperature value and less than the 7th temperature value, the electric compressor is set
Machine revolving speed are as follows: the+the second tachometer value of temperature difference described in the second setting coefficient *, the 6th temperature value are less than the 7th temperature value；
If the temperature difference is more than or equal to the 7th temperature value, it is third tachometer value that the motor compressor revolving speed, which is arranged,.
Preferably, further includes: the first fan, the second fan, slow-speed relay, fast-acting relay, intermediate relay and
The entire car controller communicated with the air-conditioner controller by CAN bus；The slow-speed relay coil-end be connected to power supply with
Between one I/O port of the entire car controller, the fast-acting relay coil-end is in parallel with the intermediate relay coil-end to be connected
Connect between power supply and another I/O port of the entire car controller, the slow-speed relay control terminal be connected to power supply with it is described
Between first fan power supply end, the first fan ground terminal is connect with the intermediate relay common end, second fan
Power end is connect with the normally closed contact of the intermediate relay, the fast-acting relay control terminal respectively, and second fan connects
Ground terminal, the intermediate relay normal opened contact be connected to ground；Air-conditioner controller leads to when air-conditioning pressure duct pressure is normal
Cross whether the pressure switch detection pressure duct pressure reaches middle pressure；If so, passing through CAN bus to the entire car controller
High-speed cruising request is sent, it is described by controlling respectively after the vehicle control unit controls receive the high-speed cruising request
Slow-speed relay, the fast-acting relay and the intermediate relay are attracted, and first fan and second fan are simultaneously
Join work；If not, sending low speed operation request, the vehicle control unit controls to the entire car controller by CAN bus
After receiving the low speed operation request, it is attracted by controlling the slow-speed relay respectively, the vehicle control unit controls institute
State the first fan and the second fan tandem working.
The beneficial effects of the present invention are:
Control method for frequency conversion air conditioner and system provided in an embodiment of the present invention, air-conditioner controller are switched in air-conditioning and run and lead to
After excess pressure switch detection air-conditioning pressure duct pressure is normal, start motor compressor；Respectively obtain expansion core temperature and
Outdoor temperature, and evaporation target value is arranged according to the outdoor temperature；According to the expansion core temperature and the evaporation mesh
Motor compressor revolving speed is arranged in scale value, so that motor compressor is run according to the motor compressor revolving speed.Through the invention, simple
Frequency conversion campaign that is single, being reliably achieved motor compressor.
Detailed description of the invention
Fig. 1 is a kind of flow chart of control method for frequency conversion air conditioner of the embodiment of the present invention.
Fig. 2 is two-spot switch and air-conditioner controller connection schematic diagram in the embodiment of the present invention.
Fig. 3 is outdoor temperature T in the embodiment of the present inventionSWith evaporation target value TmCorrespondence diagram.
Fig. 4 is temperature difference △ t and motor compressor revolving speed V correspondence diagram in the embodiment of the present invention
Fig. 5 is another flow chart of control method for frequency conversion air conditioner of the embodiment of the present invention.
Fig. 6 is three-way switch and air-conditioner controller connection schematic diagram in the embodiment of the present invention.
Fig. 7 be in the embodiment of the present invention entire car controller respectively with the first fan, the second fan connection schematic diagram.
Specific embodiment
In order to enable those skilled in the art to be further understood that feature and technology contents of the invention, with reference to the accompanying drawing
It elaborates with embodiment to the embodiment of the present invention.
It is a kind of flow chart of control method for frequency conversion air conditioner of the embodiment of the present invention as shown in Figure 1, comprising the following steps:
Step 100: starting.
Step 101: whether detection air-conditioning is switched on operation；If so, executing step 102；Otherwise, 101 are returned to step.
It should be noted that in the embodiment of the present invention, air-conditioning is detected by air-conditioner controller and whether is switched on operation, specifically
Ground determines that air-conditioning has been switched on after air-conditioner controller detects that the AC key on Air-Conditioning Control Panel is pressed.
Step 102: it is whether normal that air-conditioning pressure duct pressure being detected by pressure switch；If so, executing step 103；
Otherwise, step 109 is executed.
Specifically, in the embodiment of the present invention, pressure switch can switch for two-spot, and two-spot switch is mounted on air-conditioning high pressure
Pipeline (condenser to the pipeline between evaporator has refrigerant in the pipeline), two-spot switch detects air-conditioning by low tension switch
Pressure duct low voltage situations detect air-conditioning pressure duct high-pressure situations by high-voltage switch gear, and two-spot switch can be with air-conditioning
Controller electrical connection, as Fig. 2 be two-spot switch low tension switch K1, high-voltage switch gear K2 respectively with air-conditioner controller connection signal
Figure.The pressure value that Fig. 2 mesolow switch K1 is disconnected is first pressure value (for example, first pressure value is 0.196MPa), and height presses off
Closing the pressure value that K2 is disconnected is second pressure value (for example, second pressure value is 3.14MPa), wherein first pressure value is less than the
Two pressure values, when air-conditioning pressure duct pressure first pressure value and second pressure value range (i.e. 0.196MPa to 3.14MPa it
Between) when, low tension switch K1 and high-voltage switch gear K2 are in normally off, and air-conditioner controller detects air-conditioning pressure duct pressure at this time
Power is normal；If first pressure value of the air-conditioning pressure duct pressure lower than low tension switch K1 or the second pressure higher than high-voltage switch gear K2
When force value, two-spot switch can all be disconnected, and air-conditioner controller detects that air-conditioning pressure duct pressure is abnormal, then without frequency conversion work
Make, in the embodiment of the present invention, prevention air-conditioning system pressure anomaly can be played by the setting of pressure switch and cause pipeline and core
Body explosion and compressor damage.
Step 103: starting request is sent to compressor control module, so that the compressor control module starts electronic pressure
Contracting machine.
Step 104: obtaining expansion core temperature and outdoor temperature respectively.
Step 105: evaporation target value is arranged according to the outdoor temperature.
Specifically, evaporation target value is arranged according to the outdoor temperature includes:
When the outdoor temperature is less than or equal to the first temperature value, setting evaporation target value is first object value；When described
When outdoor temperature is greater than first temperature value and is less than or equal to second temperature value, setting evaporation target value are as follows: setting coefficient * institute
Outdoor temperature-first object value is stated, first temperature value is less than the second temperature value；Described in being greater than when the outdoor temperature
Second temperature value and when being less than or equal to third temperature value, setting evaporation target value is the second target value, and second temperature value is small
In the third temperature value；When the outdoor temperature is greater than the third temperature value and is less than or equal to four temperature values, setting
Evaporate target value are as follows: first setting coefficient * (outdoor temperature-third target value)+first object value, the third temperature value
Less than the 4th temperature value；When the outdoor temperature is greater than four temperature value, setting evaporation target value is the first mesh
Scale value.
It should be noted that the first temperature value, second temperature value, third temperature value and the 4th temperature value are according to human body
The valid interval of sense organ temperature and evaporator temperature is determined by environmental chamber and tropicalization test calibration, for example, the first temperature value is 5
DEG C, second temperature value is 15 DEG C, and third temperature value is 20 DEG C, and the 4th temperature value is 30 DEG C；First object value, the second target value,
Third target value and the first setting coefficient require to try by environmental chamber and the torrid zone according to compressor, evaporator and system energy consumption
Standard inspection determines surely, for example, first object value is 2 DEG C, the second target value is 10 DEG C, and third target value is 20 DEG C, the first setting system
Number is 0.8.It is outdoor temperature T in the embodiment of the present invention as shown in Figure 3SWith evaporation target value TmCorrespondence diagram.
It should be noted that the purpose of evaporation target value is arranged according to the outdoor temperature are as follows: be in the embodiment of the present invention
Protection evaporator prevents the too low formation frosting of evaporator surface temperature and energy saving, when evaporator temperature sensor temperature
When collected temperature is lower than the minimum temperature that evaporation requires, air-conditioner controller control compressor stops working.
Step 106: motor compressor revolving speed is arranged according to the expansion core temperature and the evaporation target value.
Specifically, include: according to the expansion core temperature and evaporation target value setting motor compressor revolving speed
It makes the difference the expansion core temperature and the evaporation target value to obtain temperature difference, be arranged according to the temperature difference
The motor compressor revolving speed.
Further, the motor compressor revolving speed is arranged according to the temperature difference includes:
When the temperature difference is less than five temperature values, it is 0 that the motor compressor revolving speed, which is arranged,；When the temperature difference is big
In being equal to the 5th temperature value and when less than six temperature values, it is the first tachometer value that the motor compressor revolving speed, which is arranged, described the
Five temperature values are less than the 6th temperature value；When the temperature difference is more than or equal to the 6th temperature value and less than the 7th temperature value
When, the motor compressor revolving speed is set are as follows: the+the second tachometer value of temperature difference described in the second setting coefficient *, the 6th temperature value
Less than the 7th temperature value；When the temperature difference is more than or equal to seven temperature values, the motor compressor revolving speed, which is arranged, is
Third tachometer value.
It should be noted that the setting of the 5th temperature value, the 6th temperature value, the 7th temperature value is led to by compressor and evaporator
It crosses calibration to determine, for example, the 5th temperature value is 1 DEG C, the 6th temperature value is 2 DEG C, and the 7th temperature value is 10 DEG C；First tachometer value,
Second tachometer value, third tachometer value and the second setting coefficient require to pass through mark according to compressor, evaporator and system energy consumption
Fixed to determine, for example, the first tachometer value is 1000RPM, the second tachometer value is 100RPM, and third tachometer value is 4600RPM, and second sets
Determining coefficient is 450.It is that temperature difference △ t and motor compressor revolving speed V corresponding relationship are illustrated in the embodiment of the present invention as shown in Figure 4
Figure.
Specifically, in Fig. 4,12 DEG C of < of < △ t is return difference section, by the way that this section is arranged it is possible to prevente effectively from compressor frequency
Numerous adjusting revolution and start and stop；T > 2 DEG C △ are linearly interval, reasonably adjust revolving speed according to environment temperature and evaporator temperature, real
Existing converting operation can make motor compressor continuously adjust itself according to temperature gap size and turn by setting linearly interval
The great refrigeration capacity compressor of speed, i.e. system requirements supplies the refrigerating capacity of great corresponding revolving speed, reduces the waste (pressure of refrigerating capacity
Contracting mechanism cooling capacity corresponds to compressor rotary speed, and compressor rotary speed corresponds to the power of compressor), it is realized with this energy-saving, protected simultaneously
Demonstrate,prove refrigeration capacity requirement.Fig. 4 homologous thread can make corresponding adjustment, principle and method phase according to different automobile types and Different climate region
Together.
Step 107: the motor compressor revolving speed being sent to the compressor control module, so that the compressor control
Molding block controls the motor compressor and runs by the motor compressor revolving speed.
Step 108: exiting.
Control method for frequency conversion air conditioner provided in an embodiment of the present invention, air-conditioner controller is in air-conditioning booting operation and passes through pressure
After switch detection air-conditioning pressure duct pressure is normal, start motor compressor；Expansion core temperature and outdoor temp are obtained respectively
Degree, and evaporation target value is arranged according to the outdoor temperature；It is set according to the expansion core temperature and the evaporation target value
Motor compressor revolving speed is set, the motor compressor revolving speed is sent to the compressor control module, so that the compressor
Control module control motor compressor is run according to the motor compressor revolving speed.Through the invention, it simply and reliably realizes
The frequency conversion campaign of motor compressor, and air-conditioning system operation energy consumption is reduced through the invention, reduce the use of air-conditioning system
Electricity.
It is another flow chart of control method for frequency conversion air conditioner of the embodiment of the present invention as shown in Figure 5, comprising the following steps:
Step 200: starting.
Step 201: whether detection air-conditioning is switched on operation；If so, executing step 202；Otherwise, 201 are returned to step.
It should be noted that can realize the control method for frequency conversion air conditioner of the embodiment of the present invention by air-conditioner controller.
Step 202: it is whether normal that air-conditioning pressure duct pressure being detected by pressure switch；If so, executing step 203；
Otherwise, step 211 is executed.
Specifically, in the embodiment of the present invention, pressure switch can be three-way switch, which is mounted on air-conditioning high pressure
Pipeline (condenser to the pipeline between evaporator has refrigerant in the pipeline), three-way switch detects air-conditioning by low tension switch
Pressure duct low voltage situations detect air-conditioning pressure duct high-pressure situations by high-voltage switch gear, and it is high to detect air-conditioning by Medium voltage switch or circuit breaker
Situation is pressed in pressure pipe road, and the three-way switch can be electrically connected with entire car controller, such as the low tension switch that Fig. 6 is three-way switch
K1 ', high-voltage switch gear K2 ', Medium voltage switch or circuit breaker K3 respectively with air-conditioner controller connection schematic diagram.In Fig. 6, the low tension switch of three-way switch
K1 ' is identical as the low tension switch K1 working principle that two-spot in Fig. 2 switchs, and two-spot is opened in high-voltage switch gear K2 ' and Fig. 2 of three-way switch
The high-voltage switch gear K2 working principle of pass is identical.
Step 203: detecting whether air-conditioning pressure duct pressure reaches middle pressure by pressure switch；If so, executing step
204；Otherwise, step 211 is executed.
Specifically, it can detecte whether air-conditioning pressure duct pressure reaches by the Medium voltage switch or circuit breaker K3 of three-way switch shown in Fig. 6
To middle pressure.When air-conditioning pressure duct pressure is in first pressure value and second pressure value range, if air-conditioning pressure duct pressure
When greater than third pressure value (for example third pressure value being 1.52MPa), third pressure value is greater than first pressure value and less than second
Pressure value, Medium voltage switch or circuit breaker K3 are connected, and illustrate that air-conditioning pressure duct pressure has reached middle pressure；If air-conditioning pressure duct pressure is less than
Third pressure value illustrates the not up to middle pressure of air-conditioning pressure duct pressure.
Step 204: high-speed cruising request being sent to entire car controller by CAN bus, so that vehicle control unit controls the
One fan and the second fan parallel operation.
Specifically, can by entire car controller shown in Fig. 7 respectively with the first fan, the second fan connection schematic diagram,
Realize the first fan of vehicle control unit controls and the second fan parallel operation.
Specifically, schematic diagram shown in Fig. 7 includes: the first fan M1, the second fan M2, slow-speed relay J1, high speed relay
Device J3, intermediate relay J2 and the entire car controller communicated with the air-conditioner controller by CAN bus；The low speed relay
Device coil-end is connected between power supply and an I/O port A04 of the entire car controller, the fast-acting relay coil-end and institute
It states intermediate relay coil-end to be connected in parallel between power supply and another I/O port A05 of the entire car controller, the low speed
Relay J1 control terminal is connected between power supply B+ and the first fan M1 power end, the first fan M1 ground terminal and institute
The connection of the common end intermediate relay J2 is stated, the second fan M2 power end connects with the normally closed of intermediate relay J2 respectively
Point, fast-acting relay J3 control terminal connection, the normal opened contact of the second fan M2 ground terminal, the intermediate relay J2
It is connected to ground；If air-conditioner controller detects pressure duct by the pressure switch when air-conditioning pressure duct pressure is normal
Pressure reaches middle pressure, then sends high-speed cruising request, the vehicle control unit controls to the entire car controller by CAN bus
After receiving high-speed cruising request, control respectively the slow-speed relay J1, the fast-acting relay J3 and it is described in
Between relay J2 be attracted, the first fan M1 and the second fan M2 parallel operation.
Step 205: starting request is sent to compressor control module, so that the compressor control module starts electronic pressure
Contracting machine.
Step 206: obtaining expansion core temperature and outdoor temperature respectively.
Step 207: evaporation target value is arranged according to the outdoor temperature.
Step 208: motor compressor revolving speed is arranged according to the expansion core temperature and the evaporation target value.
Step 209: the motor compressor revolving speed being sent to the compressor control module, so that the compressor control
Molding block controls the motor compressor and runs by the motor compressor revolving speed.
Step 210: exiting.
Step 211: low speed operation request being sent to entire car controller by CAN bus, so that vehicle control unit controls the
One fan and the second fan tandem working.
Specifically, can by entire car controller shown in Fig. 7 respectively with the first fan, the second fan connection schematic diagram,
Realize the first fan of vehicle control unit controls and the second fan tandem working.
If air-conditioner controller detects pressure duct pressure by the pressure switch when air-conditioning pressure duct pressure is normal
The not up to middle pressure of power, then send low speed operation to the entire car controller by CAN bus and request, the vehicle control unit controls
After receiving the low speed operation request, the slow-speed relay is controlled by an I/O port A04 of the entire car controller and is inhaled
It closes, the first fan described in the vehicle control unit controls and the second fan tandem working.
Control method for frequency conversion air conditioner provided in an embodiment of the present invention, detecting air-conditioning pressure duct pressure by pressure switch is
It is no normal, when air-conditioning pressure duct pressure is normal, further detect whether air-conditioning pressure duct pressure reaches middle pressure, if high
Pressure loine pressure, which reaches middle pressure, makes the first fan and the second fan parallel operation, the first fan and the second fan high-speed cruising, real
Existing high-power heat-dissipation；If the not up to middle pressure of pressure duct pressure makes the first fan and the second fan tandem working, the first fan
It is run with the second fan low speed, small-power heat dissipation is realized, to realize drop while ensure that air-conditioning system pressure is normal
The purpose of low energy consumption.
Correspondingly, the embodiment of the invention also provides a kind of Control Method of Inverter Air Conditioner, which includes: electric compressor
Machine, air-conditioner controller and the pressure switch being electrically connected with the air-conditioner controller, evaporator temperature sensor, compressor control
Module, the compressor control module and the electric compressor mechatronics；The system further include: with the air-conditioner controller electricity
The outdoor temperature sensor of connection；The air-conditioner controller detects air-conditioning by the pressure switch after air-conditioning booting operation
Whether pressure duct pressure is normal；If normal, Xiang Suoshu compressor control module sends starting request, so that the compressor
Control module starts the motor compressor；The air-conditioner controller obtains expansion core by the evaporator temperature sensor
Temperature and by the outdoor temperature sensor obtain outdoor temperature, and according to the outdoor temperature be arranged evaporation target
Value；Motor compressor revolving speed is arranged according to the expansion core temperature and the evaporation target value in the air-conditioner controller；Institute
It states air-conditioner controller and the motor compressor revolving speed is sent to the compressor control module, so that the compressor control mould
Block controls the motor compressor and runs by the motor compressor revolving speed.
Specifically, in the embodiment of the present invention, pressure switch can switch for two-spot, and two-spot switch is mounted on air-conditioning high pressure
Pipeline (condenser to the pipeline between evaporator has refrigerant in the pipeline), two-spot switch detects air-conditioning by low tension switch
Pressure duct low voltage situations detect air-conditioning pressure duct high-pressure situations by high-voltage switch gear, and two-spot switch can be with air-conditioning
Controller electrical connection, as Fig. 2 be two-spot switch low tension switch K1, high-voltage switch gear K2 respectively with air-conditioner controller connection signal
Figure.In the embodiment of the present invention, prevention air-conditioning system pressure anomaly can be played by the setting of pressure switch and cause pipeline and core
Body explosion and compressor damage.
Control Method of Inverter Air Conditioner provided in an embodiment of the present invention increases outdoor temp in existing air-conditioner control system
Sensor is spent, air-conditioner controller is according to the collected outdoor temperature of the outdoor temperature sensor and evaporator temperature sensor
Motor compressor revolving speed is arranged in collected expansion core temperature, so that motor compressor presses the motor compressor revolving speed
Operation.Through the invention, the converting operation of motor compressor is simply and reliably realized.
In another embodiment of present system, air-conditioner controller obtains outdoor temperature by outdoor temperature sensor
Afterwards, if the outdoor temperature is less than or equal to the first temperature value, setting evaporation target value is first object value；If the outdoor
Temperature is greater than first temperature value and is less than or equal to second temperature value, setting evaporation target value are as follows: described in the first setting coefficient *
Outdoor temperature-first object value, first temperature value are less than the second temperature value；If the outdoor temperature is greater than described
Second temperature value and it is less than or equal to third temperature value, setting evaporation target value is the second target value, and the second temperature value is less than
The third temperature value；If the outdoor temperature is greater than the third temperature value and is less than or equal to the 4th temperature value, setting is steamed
Send out target value are as follows: first setting coefficient * (outdoor temperature-third target value)+first object value, the third temperature value are small
In the 4th temperature value；If the outdoor temperature is greater than the 4th temperature value, setting evaporation target value is first object
Value.
It should be noted that the first temperature value, second temperature value, third temperature value and the 4th temperature value are according to human body
The valid interval of sense organ temperature and evaporator temperature is determined by environmental chamber and tropicalization test calibration, for example, the first temperature value is 5
DEG C, second temperature value is 15 DEG C, and third temperature value is 20 DEG C, and the 4th temperature value is 30 DEG C；First object value, the second target value,
Third target value and the first setting coefficient require to try by environmental chamber and the torrid zone according to compressor, evaporator and system energy consumption
Standard inspection determines surely, for example, first object value is 2 DEG C, the second target value is 10 DEG C, and third target value is 20 DEG C, the first setting system
Number is 0.8.It is outdoor temperature T in the embodiment of the present invention as shown in Figure 3SWith evaporation target value TmCorrespondence diagram.
It should be noted that the purpose of evaporation target value is arranged according to the outdoor temperature are as follows: be in the embodiment of the present invention
Protection evaporator prevents the too low formation frosting of evaporator surface temperature and energy saving, when evaporator temperature sensor temperature
When collected temperature is lower than the minimum temperature that evaporation requires, air-conditioner controller control compressor stops working.
In another embodiment of present system, the air-conditioner controller is obtained by evaporator temperature sensor to be evaporated
After device core body temperature, make the difference the expansion core temperature and the evaporation target value to obtain temperature difference；According to the temperature
The motor compressor revolving speed is arranged in difference.
Specifically, the air-conditioner controller is after obtaining temperature difference, if the temperature difference is less than the 5th temperature value, setting
The motor compressor revolving speed is 0；If the temperature difference is more than or equal to the 5th temperature value and less than the 6th temperature value, institute is set
Stating motor compressor revolving speed is the first tachometer value, and the 5th temperature value is less than the 6th temperature value；If the temperature difference
More than or equal to the 6th temperature value and less than the 7th temperature value, the motor compressor revolving speed is set are as follows: the second setting coefficient *
+ the second tachometer value of temperature difference, the 6th temperature value are less than the 7th temperature value；If the temperature difference is more than or equal to
7th temperature value, it is third tachometer value that the motor compressor revolving speed, which is arranged,.
It should be noted that the setting of the 5th temperature value, the 6th temperature value, the 7th temperature value is led to by compressor and evaporator
It crosses calibration to determine, for example, the 5th temperature value is 1 DEG C, the 6th temperature value is 2 DEG C, and the 7th temperature value is 10 DEG C；First tachometer value,
Second tachometer value, third tachometer value and the second setting coefficient require to pass through mark according to compressor, evaporator and system energy consumption
Fixed to determine, for example, the first tachometer value is 1000RPM, the second tachometer value is 100RPM, and third tachometer value is 4600RPM, and second sets
Determining coefficient is 450.It is that temperature difference △ t and motor compressor revolving speed V corresponding relationship are illustrated in the embodiment of the present invention as shown in Figure 4
Figure.
Specifically, in Fig. 4,12 DEG C of < of < △ t is return difference section, by the way that this section is arranged it is possible to prevente effectively from compressor frequency
Numerous adjusting revolution and start and stop；T > 2 DEG C △ are linearly interval, reasonably adjust revolving speed according to environment temperature and evaporator temperature, real
Existing converting operation can make motor compressor continuously adjust itself according to temperature gap size and turn by setting linearly interval
The great refrigeration capacity compressor of speed, i.e. system requirements supplies the refrigerating capacity of great corresponding revolving speed, reduces the waste (pressure of refrigerating capacity
Contracting mechanism cooling capacity corresponds to compressor rotary speed, and compressor rotary speed corresponds to the power of compressor), it is realized with this energy-saving, protected simultaneously
Demonstrate,prove refrigeration capacity requirement.Fig. 4 homologous thread can make corresponding adjustment, principle and method phase according to different automobile types and Different climate region
Together.
In another embodiment of present system, as shown in Figure 7, further includes: the first fan M1, the second fan M2, low
Fast relay J1, fast-acting relay J3, intermediate relay J2 and the vehicle communicated with the air-conditioner controller by CAN bus
Controller；The slow-speed relay coil-end is connected between power supply and an I/O port A04 of the entire car controller, the height
Fast relay coil end and the intermediate relay coil-end are connected in another IO of power supply Yu the entire car controller in parallel
Between mouth A05, the slow-speed relay control terminal is connected between power supply and first fan power supply end, first fan
Ground terminal is connect with the common end the intermediate relay J2, and second fan power supply end is respectively with the intermediate relay J2's
Normally closed contact, the fast-acting relay J3 control terminal connection, the second fan M2 ground terminal, the intermediate relay J2 it is normal
Contact is opened to be connected to ground；Air-conditioner controller detects high pressure when air-conditioning pressure duct pressure is normal, through the pressure switch
Whether loine pressure reaches middle pressure；If so, high-speed cruising request is sent to the entire car controller by CAN bus, it is described
After vehicle control unit controls receive the high-speed cruising request, by controlling the slow-speed relay J1, the high speed respectively
The relay J3 and intermediate relay J2 is attracted, the first fan M1 and the second fan M2 parallel operation；If
It is no, low speed operation request is sent to the entire car controller by CAN bus, the entire car controller receives the low speed fortune
It after row request, is attracted by controlling the slow-speed relay J1, the first fan M1 is made to connect with the second fan M2 work
Make.
In conclusion Control Method of Inverter Air Conditioner provided in an embodiment of the present invention, air-conditioner controller is switched in air-conditioning and runs
And by pressure switch detect air-conditioning pressure duct pressure it is normal after, start motor compressor；Pass through evaporator temperature sensor
It obtains expansion core temperature and outdoor temperature is obtained by outdoor temperature sensor, be arranged according to the outdoor temperature and evaporated
Target value；Motor compressor revolving speed is set according to the expansion core temperature and the evaporation target value, so that the compression
Machine control module control motor compressor is run according to the motor compressor revolving speed.Through the invention, it simply and reliably realizes
The frequency conversion campaign of motor compressor；Further, when air-conditioning pressure duct pressure is normal, air-conditioning pressure duct is further detected
Whether pressure reaches middle pressure, if pressure duct pressure reaches middle pressure and makes the first fan and the second fan parallel operation, the first wind
Fan and the second fan high-speed cruising, realize high-power heat-dissipation；If pressure duct pressure not up in pressure make the first fan and the
Two fan tandem workings, the first fan and the second fan low speed are run, and small-power heat dissipation are realized, thus ensure that air-conditioning system
While pressure is normal, the purpose for reducing energy consumption is realized.
The embodiment of the present invention has been described in detail above, and specific embodiment used herein carries out the present invention
It illustrates, the above embodiments are only used to help understand system and method for the invention；Meanwhile for the one of this field
As technical staff, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up institute
It states, the contents of this specification are not to be construed as limiting the invention.
Claims (4)
1. a kind of control method for frequency conversion air conditioner, which is characterized in that the described method includes:
After air-conditioning booting operation, it is whether normal that air-conditioning pressure duct pressure is detected by pressure switch；
If normal, starting request is sent to compressor control module, so that the compressor control module starts electric compressor
Machine；
Expansion core temperature and outdoor temperature are obtained respectively, and evaporation target value is arranged according to the outdoor temperature；
According to the expansion core temperature and the evaporation target value, motor compressor revolving speed is set；
The motor compressor revolving speed is sent to the compressor control module, so that the compressor control module controls institute
Motor compressor is stated to run by the motor compressor revolving speed；
It is described to include: according to outdoor temperature setting evaporation target value
When the outdoor temperature is less than or equal to the first temperature value, setting evaporation target value is first object value；
When the outdoor temperature is greater than first temperature value and is less than or equal to second temperature value, setting evaporation target value are as follows:
Outdoor temperature-first object value described in first setting coefficient *, first temperature value are less than the second temperature value；
When the outdoor temperature is greater than the second temperature value and is less than or equal to third temperature value, setting evaporation target value is the
Two target values, the second temperature value are less than the third temperature value；
When the outdoor temperature is greater than the third temperature value and is less than or equal to four temperature values, setting evaporation target value are as follows:
First setting coefficient * (outdoor temperature-third target value)+first object value, the third temperature value are less than the described 4th
Temperature value；
When the outdoor temperature is greater than four temperature value, setting evaporation target value is first object value；
It is described to include: according to the expansion core temperature and evaporation target value setting motor compressor revolving speed
It makes the difference the expansion core temperature and the evaporation target value to obtain temperature difference；
According to the temperature difference, the motor compressor revolving speed is set；
It is described to include: according to the temperature difference setting motor compressor revolving speed
When the temperature difference is less than five temperature values, it is 0 that the motor compressor revolving speed, which is arranged,；
When the temperature difference is more than or equal to the 5th temperature value and when less than six temperature values, the motor compressor revolving speed, which is arranged, is
First tachometer value, the 5th temperature value are less than the 6th temperature value；
When the temperature difference is more than or equal to the 6th temperature value and when less than seven temperature values, the motor compressor is set and is turned
Speed are as follows: the+the second tachometer value of temperature difference described in the second setting coefficient *, the 6th temperature value are less than the 7th temperature value；
When the temperature difference is more than or equal to seven temperature values, it is third tachometer value that the motor compressor revolving speed, which is arranged,.
2. control method for frequency conversion air conditioner according to claim 1, which is characterized in that the method also includes:
If the air-conditioning pressure duct pressure is normal, detected during whether pressure duct pressure reach by the pressure switch
Pressure；If so, high-speed cruising request is sent to entire car controller by CAN bus, so that the vehicle control unit controls first
Fan and the second fan parallel operation；Otherwise, low speed operation request is sent to entire car controller by CAN bus, so that described
First fan described in vehicle control unit controls and the second fan tandem working.
3. a kind of Control Method of Inverter Air Conditioner, comprising: motor compressor, air-conditioner controller and be electrically connected with the air-conditioner controller
Pressure switch, evaporator temperature sensor, the compressor control module connect, the compressor control module and the electric compressor
Mechatronics；It is characterized by further comprising: the outdoor temperature sensor being electrically connected with the air-conditioner controller；The air-conditioning control
Whether device processed detects air-conditioning pressure duct pressure after air-conditioning booting operation, through the pressure switch normal；If normal, to
The compressor control module sends starting request, so that the compressor control module starts the motor compressor；It is described
Air-conditioner controller obtains expansion core temperature by the evaporator temperature sensor and is sensed by the outdoor temperature
Device obtains outdoor temperature, and evaporation target value is arranged according to the outdoor temperature；The air-conditioner controller is according to the evaporator
Motor compressor revolving speed is arranged in core body temperature and the evaporation target value；The air-conditioner controller is by the motor compressor revolving speed
It is sent to the compressor control module, so that the compressor control module controls the motor compressor and presses the electronic pressure
The operation of contracting machine revolving speed；
After the air-conditioner controller obtains outdoor temperature by outdoor temperature sensor, if the outdoor temperature is less than or equal to the
One temperature value, setting evaporation target value is first object value；
If the outdoor temperature is greater than first temperature value and is less than or equal to second temperature value, setting evaporation target value are as follows:
Outdoor temperature-first object value described in first setting coefficient *, first temperature value are less than the second temperature value；
If the outdoor temperature is greater than the second temperature value and is less than or equal to third temperature value, setting evaporation target value is the
Two target values, the second temperature value are less than the third temperature value；
If the outdoor temperature is greater than the third temperature value and is less than or equal to the 4th temperature value, setting evaporation target value are as follows:
First setting coefficient * (outdoor temperature-third target value)+first object value, the third temperature value are less than the described 4th
Temperature value；
If the outdoor temperature is greater than the 4th temperature value, setting evaporation target value is first object value；
After the air-conditioner controller obtains expansion core temperature by evaporator temperature sensor, by the expansion core body temperature
Degree makes the difference to obtain temperature difference with the evaporation target value；According to the temperature difference, the motor compressor revolving speed is set；
The air-conditioner controller is after obtaining temperature difference, if the electronic pressure is arranged less than the 5th temperature value in the temperature difference
Contracting machine revolving speed is 0；
If the temperature difference is more than or equal to the 5th temperature value and less than the 6th temperature value, the motor compressor revolving speed, which is arranged, is
First tachometer value, the 5th temperature value are less than the 6th temperature value；
If the temperature difference is more than or equal to the 6th temperature value and less than the 7th temperature value, the motor compressor is set and is turned
Speed are as follows: the+the second tachometer value of temperature difference described in the second setting coefficient *, the 6th temperature value are less than the 7th temperature value；
If the temperature difference is more than or equal to the 7th temperature value, it is third tachometer value that the motor compressor revolving speed, which is arranged,.
4. Control Method of Inverter Air Conditioner according to claim 3, which is characterized in that further include: the first fan, the second wind
Fan, slow-speed relay, fast-acting relay, intermediate relay and the vehicle communicated with the air-conditioner controller by CAN bus
Controller；The slow-speed relay coil-end is connected between power supply and an I/O port of the entire car controller, the high speed
Relay coil end and the intermediate relay coil-end are connected in another I/O port of power supply Yu the entire car controller in parallel
Between, the slow-speed relay control terminal is connected between power supply and first fan power supply end, the first fan ground connection
End is connect with the intermediate relay common end, and second fan power supply end connects with the normally closed of the intermediate relay respectively
Point, the fast-acting relay control terminal connection, the second fan ground terminal, the intermediate relay normal opened contact with ground
Connection；Whether air-conditioner controller detects pressure duct pressure when air-conditioning pressure duct pressure is normal, through the pressure switch
Reach middle pressure；If so, sending high-speed cruising request, the entire car controller control to the entire car controller by CAN bus
After system receives high-speed cruising request, by controlling the slow-speed relay, the fast-acting relay and described respectively
Intermediate relay is attracted, first fan and the second fan parallel operation；If not, by CAN bus to described whole
Vehicle controller sends low speed operation request and passes through difference after the vehicle control unit controls receive the low speed operation request
It controls the slow-speed relay to be attracted, the first fan described in the vehicle control unit controls and the second fan tandem working.
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| CN107323210A (en) * | 2017-06-30 | 2017-11-07 | 博耐尔汽车电气系统有限公司 | A kind of optimization method of pure electric automobile air conditioning system frosting critical point |
| CN108482063A (en) * | 2018-04-02 | 2018-09-04 | 奇瑞汽车股份有限公司 | A kind of control method and device of motor compressor for vehicle air conditioner rotating speed |
| CN108656895A (en) * | 2018-04-28 | 2018-10-16 | 奇瑞汽车股份有限公司 | A kind of electric automobile air conditioner adjusting method |
| CN111497551A (en) * | 2019-01-31 | 2020-08-07 | 北京新能源汽车股份有限公司 | Air conditioning system control method and device and controller |
| CN111520354B (en) * | 2020-05-13 | 2021-02-23 | 安徽江淮汽车集团股份有限公司 | Series-parallel control circuit and device |
| CN113085480B (en) * | 2021-04-07 | 2022-09-02 | 青岛海尔空调器有限总公司 | Vehicle-mounted air conditioning system and control method thereof |
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| CN102235730A (en) * | 2010-04-30 | 2011-11-09 | 南京飞洋汽车电子有限责任公司 | Automatic speed regulation controller of air conditioning motor-driven compressor |
| CN202303772U (en) * | 2011-10-31 | 2012-07-04 | 重庆长安汽车股份有限公司 | Manual pull cord type air conditioner controller for electric vehicles |
| CN103287239A (en) * | 2012-03-02 | 2013-09-11 | 汉拏空调株式会社 | Heat pump system for vehicle and method of controlling the same |
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| CN102235730A (en) * | 2010-04-30 | 2011-11-09 | 南京飞洋汽车电子有限责任公司 | Automatic speed regulation controller of air conditioning motor-driven compressor |
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