CN107228450B - Air conditioning system, and control system and control method thereof - Google Patents
Air conditioning system, and control system and control method thereof Download PDFInfo
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- CN107228450B CN107228450B CN201610169988.3A CN201610169988A CN107228450B CN 107228450 B CN107228450 B CN 107228450B CN 201610169988 A CN201610169988 A CN 201610169988A CN 107228450 B CN107228450 B CN 107228450B
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- electronic expansion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- B60H1/00007—Combined heating, ventilating, or cooling devices
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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
- B60H1/0065—Control members, e.g. levers or knobs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
Abstract
The invention discloses an air conditioning system and a control method thereof, wherein a first evaporator and a second evaporator are arranged in parallel, a first electronic expansion valve and the first evaporator are arranged in series, a second electronic expansion valve and the second evaporator are arranged in series, the opening degrees of the first electronic expansion valve and the second electronic expansion valve can be respectively adjusted to control the refrigerant flow of a branch where the first evaporator and the second evaporator are located, and the air conditioning system stores initialization state and position information before power failure by controlling each electronic expansion valve so as to receive or read the last stored state and position information before power failure, thereby completing initialization switching, reducing the step loss risk of the electronic expansion valves, saving system starting time and reducing system energy consumption.
Description
Technical Field
The invention relates to an air conditioning system, in particular to an air conditioning system and a control device and a control method of an electronic expansion valve of the air conditioning system.
Background
In the existing automobile system, an automobile air conditioner is taken as one of main energy consumption units, energy conservation of the automobile air conditioner is gradually provided along with improvement of the energy conservation requirement of the whole automobile, and in the automobile air conditioner system, the flow of a system refrigerant is effectively controlled, so that the system can exert optimal efficiency and is beneficial to energy conservation of the air conditioner system; for example, the air conditioning system of the electric automobile adopts the compressor which can be adjusted in a variable speed mode, the working condition change range is large, and the opening degree can be accurately adjusted by using the electronic expansion valve so as to adapt to the flow change requirement of the compressor; however, the electronic expansion valve of the air conditioning system is used as an execution component, and the opening of the electronic expansion valve needs to be accurately adjusted under a reasonable control logic, so that the air conditioning heat exchange system achieves performance optimization and reliably runs, and if the opening of the electronic expansion valve is adjusted to be out of step, the air conditioning system is probably out of control. According to the whole process of the operation of the current automobile air conditioning system, the control process of the electronic expansion valve mainly comprises several stages of starting, operation control, stopping and the like, for example, how the adjustment performance of the operation control stage directly influences the energy consumption adjustment of the air conditioner, and therefore, how to improve the opening adjustment performance of the electronic expansion valve is the technical development trend in the field of the current air conditioning system.
Disclosure of Invention
In order to solve the technical problems, the invention provides an air conditioning system, a control method and a control device of the air conditioning system, which can reduce the step-out risk of an electronic expansion valve and save the system starting time.
In order to achieve the purpose, the air conditioning system adopts the technical scheme that: an air conditioning system comprises a compressor, a first heat exchanger, a second heat exchanger, a first evaporator, a second evaporator, a first electronic expansion valve and a second electronic expansion valve, wherein the first heat exchanger is arranged on a pipeline between an outlet of the compressor and inlets of the first and second electronic expansion valves; the first evaporator and the second evaporator are arranged in parallel, the first electronic expansion valve and the first evaporator are arranged in series, the second electronic expansion valve and the second evaporator are arranged in series, the opening degrees of the first electronic expansion valve and the second electronic expansion valve can be respectively adjusted to control the refrigerant flow of a branch where the first evaporator and the second evaporator are located, the first electronic expansion valve and the second electronic expansion valve complete initialization switching according to initialization state information and original position information stored in an air conditioning system after being electrified before adjusting the opening degrees, the states of the first electronic expansion valve and the second electronic expansion valve can be adjusted to be in initialization completion states, and the first electronic expansion valve and the second electronic expansion valve can obtain initial position information.
The invention also discloses a control system of the air conditioning system, which comprises an air conditioning controller and an electric control part for controlling the action of the electronic expansion valve, wherein the air conditioning controller is a control center of the air conditioning system and is used for receiving and analyzing the control signal and/or the input information of a vehicle system or a control panel and sending the control signal generated by analysis to the electronic expansion valve, and the electronic expansion valve controls the action of the electronic expansion valve according to the control signal;
the air conditioner controller or the electric control part comprises a storage unit, and the storage unit can store the position information and the initialization completion state information of the electronic expansion valve;
and acquiring an initialization switching signal according to the position information and the initialization completion state information provided by the storage unit of the air conditioner controller, and controlling the electronic expansion valve to complete the initialization state switching according to the initialization switching signal by the electric control part.
The invention also discloses a control method of the air conditioning system, which comprises a control method for controlling the electronic expansion valve of the air conditioning system, wherein the control method for the electronic expansion valve comprises the following steps: when the air conditioner controller starts a program for controlling the power failure of the electronic expansion valve, the air conditioner controller or the electric control part stores the initialized state and the position information of the electronic expansion valve through a built-in storage unit, and then controls the power failure of the electronic expansion valve so that the electronic expansion valve completes the initialized state switching at the power-on stage.
Compared with the prior art, the invention stores the initialization state information and the original position information before the power failure of the electronic expansion valve, so that the electronic expansion valve can quickly acquire the current position information after being electrified again and can be quickly switched to the initialization completion state, the desynchronizing risk of the electronic expansion valve is reduced, the system starting time is saved and the system energy consumption is reduced.
Drawings
FIG. 1 is a system diagram illustrating portions of one embodiment of an air conditioning system according to the present invention;
FIG. 2 is a system diagram of another embodiment of the air conditioning system of the present invention;
FIG. 3 is one embodiment of an electronic expansion valve electrical control portion of the air conditioning system of the present invention;
FIG. 4 is another embodiment of the electronic expansion valve electrical control portion of the air conditioning system of the present invention;
fig. 5 is a schematic diagram of a portion of the LIN signal data segment for initial switching of the electronic expansion valve of fig. 3;
fig. 6 is a schematic diagram of a control method for initiating switching of the electronic expansion valve of fig. 3 in the LIN control mode;
FIG. 7 is a schematic diagram of a second control method for initiating a switch of the electronic expansion valve shown in FIG. 3;
FIG. 8 is a schematic diagram of a third control method for initiating a switch of the electronic expansion valve shown in FIG. 3;
FIG. 9 is a schematic diagram of a fourth control method for initiating a switch of the electronic expansion valve shown in FIG. 3;
fig. 10 is a schematic diagram of a first control method for initiating a switch of the electronic expansion valve shown in fig. 4;
fig. 11 is a schematic diagram of a second control method for performing an initial switching operation of the electronic expansion valve shown in fig. 4.
Detailed Description
Referring to fig. 1 to 2, the present embodiment discloses an air conditioning system, which at least includes a heat exchange system, such as an air conditioning system for a vehicle or a home, which exchanges heat with ambient air or a cooling fluid through a system refrigerant, and has a cooling function and/or a heating function and/or a dehumidifying function, and particularly, the air conditioning system may perform a cooling cycle or a heating cycle under a control command, the air conditioning system forms a refrigerant flow path by a compressor 100, an outdoor heat exchanger, an indoor heat exchanger, and at least two electronic expansion valves (EXV) connected together, performs a cooling cycle when the indoor heat exchanger functions as an evaporator, performs a heating cycle when the indoor heat exchanger functions as a condenser, such as a cooling cycle in hot summer to cool the inside of a vehicle or the inside of a room, the electronic expansion valve is used as a throttling element between an external heat exchanger and an internal heat exchanger to regulate the flow of a refrigerant in the refrigeration/heating cycle.
In the embodiment shown in fig. 1, the heat exchange system includes a compressor 100, a first heat exchanger 200, a second heat exchanger 300, a first evaporator 401, a second evaporator 402, a first electronic expansion valve 501, and a second electronic expansion valve 502 connected by refrigerant pipelines, specifically, the first heat exchanger 200 is located between an outlet of the compressor and inlets of the first and second electronic expansion valves, the second heat exchanger 300 includes a first heat exchange portion 301 and a second heat exchange portion 302, the first heat exchange portion and the second heat exchange portion can exchange heat therebetween, specifically, the second heat exchanger is a two-channel heat exchanger, a channel of the first heat exchange portion and a working medium of a channel of the second heat exchange portion are in a contact manner of heat transfer and no mass transfer, a first heat exchange portion of the second heat exchanger is located in a pipeline between an outlet of the first heat exchanger and inlets of the first and second electronic expansion valves, the second heat exchange part of the second heat exchanger is arranged on a pipeline between the outlets of the first evaporator and the second evaporator and the inlet of the compressor, and a liquid accumulator 600 is further arranged on the pipeline before the inlet of the second heat exchanger 300 and after the outlets of the evaporators, so that liquid impact on the compressor caused by the refrigerant is prevented; the heat exchange system is provided with two branches in a parallel connection mode between an outlet of a second heat exchanger and an inlet of a compressor, wherein one branch is a first electronic expansion valve and a first evaporator, the other branch is a second electronic expansion valve and a second evaporator, specifically, the first evaporator 401 is positioned between the outlet of the first electronic expansion valve and the inlet of the compressor, the second evaporator 402 is positioned between the outlet of the second electronic expansion valve and the inlet of the compressor, the first electronic expansion valve 501 and the first evaporator 401 are arranged in a series connection mode, the second electronic expansion valve 502 and the second evaporator 402 are arranged in a series connection mode, the first electronic expansion valve and the second electronic expansion valve respectively control the refrigerant flow of the branch where the first evaporator and the second evaporator are positioned by adjusting the opening degree of the first electronic expansion valve and the second electronic expansion valve respectively, the branches where the first evaporator and the second evaporator are positioned can be respectively and effectively controlled according to specific conditions.
In another embodiment as shown in fig. 2, the heat exchange system further includes another branch connected in parallel between the outlet of the second heat exchanger and the inlet of the compressor, and the branch is provided with a third electronic expansion valve and a cooler, and the cooler can be used as a battery cooling element to cool the heat-generating battery device.
The first heat exchanger 200 serves as a heat absorbing device or a heat dissipating device, such as an evaporator or a condenser, which absorbs or dissipates heat from an external ambient medium by a refrigerant, the second heat exchanger 300 serves as a heat absorbing device, such as an evaporator, which absorbs heat from an ambient medium by a refrigerant, and the third heat exchanger 400 serves as a heat dissipating device, such as a condenser or an air cooler, which dissipates heat to an ambient medium by a refrigerant.
Referring to fig. 3 and 4, two embodiments of a control system adopted by the air conditioning system are schematically shown, where the control system includes an air conditioning controller 61 and an electric control part 62 for controlling an EXV action, where the air conditioning controller is used as a control center of the air conditioning system, and is configured to receive and analyze a control signal and/or input information and/or sensor information of a vehicle system or a control panel, and send the analyzed control signal to the EXV, where the control signal at least includes an initialization switching signal, so as to directly switch an EXV state to an initialization completion state, and the EXV controls the EXV action according to the control signal received by the electric control part; the electric control part is used for receiving and analyzing input information and/or sensor information sent by the air conditioner controller, combining preset feedback information stored by the electric control part and aiming at an EXV control program and/or the electric control part, obtaining a control signal through calculation, converting the control signal into electric quantity capable of being executed by the EXV, and controlling the EXV action through the electric quantity.
The air conditioner controller 61 includes a storage unit capable of storing the EXV location information and the initialization completion status information, and specifically, the air conditioner controller 61 has a central processing module, and the storage unit may be integrally disposed in the central processing module of the air conditioner controller; or, in other embodiments, the electronic control portion 62 includes a storage unit, where the storage unit needs to be capable of storing the EXV position information and the initialization completion state information, and is used for the electronic control portion to read the storage information in a power-on stage, specifically, the electronic control portion 62 provides the storage unit by setting a central processing module 621, and the storage unit may be set in the central processing module of the electronic control portion in an integrated manner; it should be noted that the EXV position can be represented by the position of the valve needle, generally expressed in steps, such as a 0-step position representing the valve needle at the bottom and the flow rate is 0, and a 480-step position representing the valve needle at the top and the flow rate is maximum; the EXV state value has at least three states, which can be defined as non-initialized, initialized in progress and initialized completed.
The storage unit is formed by a nonvolatile storage element, can still store data when the EXV is powered off, and is convenient to provide when the EXV is powered on; in each electrifying stage of the EXV, the EXV can obtain the initialization switching signal according to the position information and the initialization completion state information provided by the storage unit of the air conditioner controller or the storage unit of the electric control part, the electric control part controls the EXV to complete the initialization state switching according to the initialization switching signal, the EXV can obtain the initial position information, the position and the state of the EXV are adjusted to be in the initialization completion state to be used as the initial position for adjusting the opening degree next time, the EXV cannot identify the initial position or identify the excessive deviation of the initial position, the desynchronizing risk can be reduced, the adjusting precision of the EXV can be improved, the mechanical structure of the EXV can not carry out the initialization action, the initialization can be omitted in the electrifying stage of the EXV, for example, the process of firstly fully closing and then reaching a certain opening degree or firstly fully closing and then fully opening then reaching a certain opening degree when the EXV is not required, the power-on starting time of the EXV is relatively shortened, and the power consumption and the initialization noise of the EXV can also be reduced.
Specifically, when an air conditioner controller starts an EXV power-down program, a storage unit of the air conditioner controller or the electric control part can at least store the EXV initialization completion state and position information; when the air conditioner controller starts an EXV power-on program, the EXV can switch the self state to the initialization completion state and the switch position to the stored position according to the information stored in the storage unit, so that the initialization state switching is completed.
As shown in fig. 3, in an embodiment of the control system, the control system is an LIN control system, Local Internet Network (LIN) control mode signal transmission is adopted, the LIN control system includes a master node (master node) and a plurality of slave nodes (slave nodes), in this embodiment, the air conditioner controller 61 (e.g., HVAC controller) is used as the LIN master node or the LIN bus, the EXV is used as one of the LIN slave nodes, and by omitting an initialization process of an EXV power-on stage, power consumption of the slave node where the EXV is located can be relatively reduced, power consumption of the entire LIN Network can be relatively reduced, and further, vehicle environment temperature, such as high-temperature environment in an engine compartment, can be indirectly reduced, and reliability of performance of each device can be improved.
The electric control part 62 comprises the above-mentioned central processing module 621, bus signal receiving/transmitting module (LIN transceiver module 622), stepping drive control module 623 and drive module 624, the electric control part is used for controlling the EXV mechanical part to act, such as a rotor, a transmission part and a valve needle (not shown) of a stepping motor, and particularly, the electric control part can control the rotor to rotate and drive the valve needle to move up and down through the rotation of the rotor, therefore, the opening degree can be controlled by adjusting the position of the valve needle, the EXV position and the state are adjusted to the initialization completion state by acquiring the information stored in the storage unit in the EXV electrifying starting stage, the step-out risk can be reduced, the EXV adjusting precision is improved, meanwhile, initialization calibration in the power-on stage can be omitted, mechanical wear caused by long-term multiple initialization of the EXV can be further relatively reduced, and the service life of the product is prolonged.
The LIN transceiver module 622, which transmits the detected signal on the LIN bus to the central processing module,
the central processing module 621 is configured to analyze the signal to obtain an analysis result, and send a feedback signal corresponding to the analysis result to the LIN bus through the LIN signal sending module 13;
the central processing module 621 is responsible for receiving and analyzing control information from a main control panel of the air conditioning system, sending the analyzed control signal for the EXV to the drive control module, recording or storing the current position information of the EXV, and sending a feedback signal corresponding to the analysis result to the LIN bus through the bus transceiving module;
the driving control module 623 is responsible for receiving a control signal for controlling the EXV from the central processing module of the air conditioner controller or the electric control part, and transmitting the control signal to the driving module;
the driving module 624 provides the electronic coil with an electrical signal meeting the requirement of the control signal, and the electrical signal meeting the requirement of the control signal can control the valve needle to act.
Specifically, under the condition that the EXV position information and the initialization completion state information are stored by the storage unit, the EXV is switched to the initialization completion state by reading the stored state value when the power is on, the stored original position information can be read by the electric control part, and the stored original position information is set as the current EXV position value;
or, the air conditioner controller stores EXV position information and initialization completion state information by setting a storage unit, and in an EXV power-down stage, the position information and the initialization completion state information are sent from the EXV to the air conditioner controller for storage in an LIN signal manner, and when the air conditioner controller is powered on, the air conditioner controller issues the initialization switching signal to the EXV electronic control part in an LIN control mode, wherein the initialization switching signal includes initialization state switching information and stored original position information, the electronic control part receives the initialization state switching information, switches the EXV state to the initialization completion state, and the electronic control part receives the stored original position information, sets the stored original position information as an EXV current position value, so that the EXV completes initialization state switching;
more specifically, the initialization switching signal provided by the air conditioner controller to the EXV is a LIN signal, as shown in fig. 5, the LIN signal at least includes two LIN data bytes, each data byte includes eight data bits (bit), the position information is characterized by a LIN position signal (signal) that all 8 bits of the nth byte and the N +1 byte lower two bits (bit0 and bit1) are used for representing the current position of the EXV, and the initialization state switching information is expressed as: the upper two bits of byte N +1 (bit6 and bit7), where N is equal to or greater than 1, with these two signals of the initialization switch signal the LIN master can issue state switches and stored home position information to the EXV electronic control portion. As for the other LIN signals, the definition may be referred to with reference to the above-mentioned two signal definitions in the response data (response data) of the LIN frame (frame).
In another embodiment of the air conditioning control system shown in fig. 4, compared to the embodiment shown in fig. 3, the air conditioning controller 63 may be integrated with the EXV electronic control unit;
the air conditioner controller 63 is responsible for receiving input information and/or sensor information of a main control board of an air conditioning system, combining a preset control program for an EXV stored in the air conditioner controller, and/or feedback information stored in the air conditioner controller, wherein the feedback information at least comprises initialization completion state information and position information stored in a storage unit of the air conditioner controller, and obtaining a control signal through operation, and sending the control signal to the electric control part 64;
and the electric control part 64 is used for converting the control signal into electric quantity which can be executed by the EXV, and the EXV can be controlled by the electric quantity.
Specifically, the air conditioner controller is provided with a central processing module 630, the EXV electronic control portion 64 is provided with a driving control module 641 and a driving module 642, wherein the central processing module of the air conditioner controller is responsible for receiving input information and/or sensor information, generating a control signal for the EXV through operation, and sending the control signal to the driving control module, recording or storing the current position information of the EXV, specifically, in the EXV power-down stage, the position information and the initialization completion state information are stored in the central processing module of the air conditioner controller 63 in a variable form, and the central processing module of the air conditioner controller can identify itself.
In this embodiment, the storage unit of the air conditioner controller is integrally disposed in the central processing module 630 of the air conditioner controller, the air conditioner controller 63 can read the stored state value as an initialization completion state in the EXV power-on stage, and the air conditioner controller can read the stored home position information, and set the stored home position information as an EXV current position value, which is provided to the electronic control portion to switch the state to the initialization state and set the stored home position information as the EXV current position value.
Referring to fig. 6 to 11, two control methods of the air conditioning system shown in fig. 3 and 4 are schematically shown, and the control methods include a control method for controlling an EXV:
when the air conditioner controller starts a program for controlling the power failure of the EXV, the air conditioner controller or the electric control part stores the initialization completion state and the position information of the EXV through a built-in storage unit, and then controls the power failure of the EXV, so that the EXV completes the initialization state switching before the opening is adjusted in the power-on stage, and the accurate initial opening is provided as the reference for opening adjustment;
and when the air conditioner controller starts and controls the EXV power-on program, according to the EXV initialization completion state and the position information stored in the storage unit, the state of the EXV switching self is the initialization completion state, and the position information is set as the current position value, so that the initialization state switching is completed.
Specifically, as shown in fig. 6, the air conditioner controller communicates with the EXV through a local network connection control mode, and in an EXV power-down stage, the method includes the following steps:
s11: the air conditioner controller starts a program for controlling the EXV to power off;
s12: the position information and the initialization completion state information are fed back to a storage unit of the air conditioner controller from an EXV in a LIN signal mode to be stored;
s13: and controlling the EXV to lose power and ending.
In addition, in the EXV power-on phase, the method comprises the following steps:
s21: the air conditioner controller controls the EXV to be powered on;
s22: the air conditioner controller sends state switching and stored original position information to an EXV (external EXV) through an LIN control mode;
s23: then, the EXV electric control part switches the state according to the received initialization state switching information, and switches the EXV state into an initialization completion state; the EXV electric control part receives the stored original position information and sets the stored position as an EXV current position value;
s24: the EXV initialization state switch is complete.
Referring to another embodiment of the EXV control method shown in fig. 7, before the EXV loses power, at least one initialization operation is performed, specifically, the following steps are performed:
s31: the air conditioner controller starts a program for controlling the EXV to power off;
s32: the air conditioner controller sends an initialization control signal to the EXV;
s33: the EXV is controlled to be initialized, and the step-out risk of the EXV is further reduced;
s34: after EXV initialization is completed, feeding back state and position information to an air conditioner controller (LIN main node);
s35: the storage unit of the air conditioner controller stores the state information and the position information fed back by the EXV;
s36: and controlling the EXV to lose power and ending.
In addition, in the EXV power-up phase, reference is made to the power-up phase shown in fig. 6.
Referring to fig. 8, a third embodiment of the air conditioning system shown in fig. 3 is schematically shown, where the EXV position value and the initialization state information are stored in a storage unit of an EXV electronic control unit before the EXV is powered off, specifically as follows:
in the EXV power-down stage, the method comprises the following steps:
s41: the air conditioner controller starts a program for controlling the EXV to power off;
s42: the air conditioner controller sends a storage instruction through a local network connection control mode, and controls a storage unit of the EXV to store the position and the initialization state of the EXV valve;
s43: sending a storage completion feedback signal to the air conditioner controller after the EXV executes the storage,
s44: and controlling the EXV to lose power and ending.
In addition, in the EXV power-on phase, the method comprises the following steps:
s51: the air conditioner controller controls the EXV to be powered on;
s52: the EXV electric control part reads the state value from the storage unit of the electric control part to be an initialization completion state, so that the EXV state is the initialization completion state;
s53: the EXV electric control part reads the position value, and the read position value is set as the EXV current position value;
s54: the EXV initialization state switch is complete.
Referring to the EXV control method shown in fig. 9, which schematically shows a fourth embodiment of the air conditioning system shown in fig. 3, compared to the above third embodiment, the EXV performs at least one initialization operation before power failure, specifically including the following steps:
s61: the air conditioner controller starts a program for controlling the EXV to power off;
s62: the air conditioner controller sends an initialization control signal to the EXV;
s63: controlling the EXV to initialize;
s64: after the initialization is finished, controlling a storage unit of the electric control part to store the state information and the position information fed back by the EXV;
s65: the EXV sends a feedback signal and feeds back the state and position information of an air conditioner controller (LIN main node) to be successfully stored;
s66: and controlling the EXV to lose power and ending.
In addition, in the EXV power-up stage, reference is made to the steps shown in fig. 8.
Referring to the EXV control method shown in fig. 10, which schematically shows a first embodiment of the air conditioning system shown in fig. 4, the air conditioning controller 63 may be integrated with the EXV electronic control unit;
in the EXV power-down stage, the method comprises the following steps:
s71: the air conditioner controller starts a program for controlling the EXV to power off;
s72: the position information and the initialization completion state information are stored in a storage unit of the air conditioner controller in a variable form;
s73: and controlling the EXV to lose power and ending.
In addition, in the EXV power-on phase, the method comprises the following steps:
s81: the air conditioner controller is powered on;
s82: the air conditioner controller reads a state value from a self storage unit to be an initialization completion state, so that an EXV state is the initialization completion state;
s83: the air conditioner controller reads a position value from a self storage unit, and the read position value is an EXV current position value;
s84: the EXV initialization state switch is complete.
Referring to the EXV control method shown in fig. 11, which schematically shows a second embodiment of the air conditioning system shown in fig. 4, the method for performing at least one initialization operation before the EXV loses power, specifically, in the EXV power-down stage, includes the following steps:
s91: the air conditioner controller starts a program for controlling the EXV to power off;
s92: the air conditioner controller controls the EXV to initialize, and the step-out risk of the EXV is further reduced;
s93: after the EXV initialization is finished, controlling a storage unit of the air conditioner controller to store the EXV state information and the position information;
s94: and controlling the EXV to lose power and ending.
In addition, in the EXV power-up phase, reference is made to the power-up phase shown in fig. 10.
In the air conditioning system control method, initialization or non-initialization is performed in a power-off program, the EXV position and the initialization state value are not affected, and the storage unit serving as a functional unit part for storing the EXV state and position information can be arranged in an EXV electric control part or a LIN main node or other modules of an automobile air conditioning center processing module.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (14)
1. An air conditioning system at least comprises a heat exchange system, wherein the heat exchange system comprises a compressor, a first heat exchanger, a second heat exchanger, a first evaporator, a second evaporator, a first electronic expansion valve and a second electronic expansion valve, the first heat exchanger is arranged on a pipeline between an outlet of the compressor and inlets of the first and second electronic expansion valves, the second heat exchanger comprises a first heat exchange part and a second heat exchange part, heat exchange can be carried out between the first heat exchange part and the second heat exchange part, the first heat exchange part of the second heat exchanger is arranged on a pipeline between an outlet of the first heat exchanger and inlets of the first and second electronic expansion valves, and the second heat exchange part of the second heat exchanger is arranged on a pipeline between an outlet of the first and second evaporators and an inlet of the compressor; the air conditioner system comprises a first evaporator, a second evaporator, an air conditioning system and an air conditioning system, wherein the first evaporator and the second evaporator are arranged in parallel, the first electronic expansion valve and the first evaporator are arranged in series, the second electronic expansion valve and the second evaporator are arranged in series, the air conditioning system can respectively adjust the opening degrees of the first electronic expansion valve and the second electronic expansion valve, the first electronic expansion valve and the second electronic expansion valve complete initialization switching according to initialization state information and original position information stored in the air conditioning system before the opening degrees of the first electronic expansion valve and the second electronic expansion valve are adjusted after power-on, the states of the first electronic expansion valve and the second electronic expansion valve can be adjusted to be initialization completion states, and the first electronic expansion valve and the second electronic expansion valve can obtain respective initial position.
2. The air conditioning system of claim 1, wherein the air conditioning system comprises at least a heat exchange system, the heat exchange system is a heating, ventilating, air conditioning and cooling system, the heat exchange system further comprises a third electronic expansion valve and a cooler, the third electronic expansion valve and the cooler are located between the outlet of the first heat exchanger and the inlet of the compressor, and the cooler is arranged in parallel with the first evaporator and the second evaporator.
3. The air conditioning system as claimed in claim 2, wherein the third electronic expansion valve is connected in series with a cooler, the opening of the third electronic expansion valve is adjusted to control the refrigerant flow of the branch of the battery cooler, the cooler is a cooling element of a heat generating component and can cool the heat generating component, the third electronic expansion valve completes initialization switching according to the initialization state information and the home position information stored in the air conditioning system after being powered on and before the opening is adjusted, and the home position of the third electronic expansion valve is used as the initial position.
4. A control system of an air conditioning system comprises an air conditioning controller and an electric control part for controlling the action of an electronic expansion valve, wherein the air conditioning controller is a control center of the air conditioning system and is used for receiving and analyzing control signals and/or input information of a vehicle system or a control panel and sending the control signals generated by analysis to the electronic expansion valve, and the electronic expansion valve controls the action of the electronic expansion valve according to the control signals;
the air conditioner controller or the electric control part comprises a storage unit, and the storage unit can store the position information and the initialization completion state information of the electronic expansion valve;
and acquiring an initialization switching signal according to the position information and the initialization completion state information provided by the storage unit of the air conditioner controller, and controlling the electronic expansion valve to complete the initialization state switching according to the initialization switching signal by the electric control part.
5. The control system of claim 4, wherein the storage unit is disposed in a central processing module of the air conditioner controller or the electronic expansion valve, and the storage unit is formed of a non-volatile storage element, and when the air conditioner controller starts a power-down program of the electronic expansion valve, the storage unit of the air conditioner controller or the electronic control part can at least store the initialization completion state and the position information of the electronic expansion valve; when the air conditioner controller starts the power-on program of the electronic expansion valve, the electronic expansion valve sets the stored position information as the current position value and switches the self state to the initialization completion state according to the information stored in the storage unit, thereby completing the initialization state switching.
6. The control system of an air conditioning system according to claim 4 or 5, wherein the air conditioning controller supplies the initialization switch signal, which includes initialization state switch information and stored home position information, to the electric control part through a local network connection control mode, wherein the electric control part receives the initialization state switch information, switches the state of the electronic expansion valve to an initialization complete state, and the electric control part receives the stored home position information, and sets it as a current position value of the electronic expansion valve;
or the electric control part can read the stored state value as the initialized state and switch the state of the electronic expansion valve into the initialized state, and the electric control part can read the stored original position information and set the original position information as the current position value of the electronic expansion valve;
or the air conditioner controller can read the stored state value as an initialization completion state, and the air conditioner controller can read the stored original position information and provide the information to the electric control part to switch the state to the initialization state and set the stored original position information as the current position value.
7. The control system of claim 6, wherein the initialization switch signal provided by the air conditioner controller to the electronic expansion valve is a LIN signal, the initialization switch signal comprises at least two LIN data bytes, each LIN data byte comprises eight data bits, the stored original position information is characterized by all 8 bits of the Nth byte and the lower two bits of the (N + 1) th byte (bit0 and bit1), and the initialization state switch information is expressed as: high two bits (bit6 and bit7) of the (N + 1) th byte, wherein N is equal to or more than 1, the air conditioner controller can send state switching and stored original position information to an electric control part of the electronic expansion valve through the initialization switching signal.
8. The control system of the air conditioning system according to claim 6, wherein the air conditioning controller is configured to receive input information and/or sensor information of a main control board of the air conditioning system; the electronic control part is used for receiving and analyzing input information and/or sensor information sent by the air conditioner controller, combining a preset control program for the electronic expansion valve and/or feedback information stored by the electronic control part, obtaining a control signal through operation, converting the control signal into electric quantity capable of being executed by the electronic expansion valve, and controlling the electronic expansion valve through the electric quantity; the air conditioner controller is used for storing the position information and the initialization completion state information of the electronic expansion valve by setting the storage unit and sending the information to the electric control part, wherein the control signal at least comprises an initialization switching signal, or the electric control part is used for storing the feedback information by setting the storage unit and at least comprises the initialization completion state information and the position information stored in the storage unit of the electric control part and used for the electric control part to read;
or the air conditioner controller is responsible for receiving input information and/or sensor information of a main control board of the air conditioning system, and combining a preset control program for the electronic expansion valve stored in the air conditioner controller and/or feedback information stored in the air conditioner controller, obtaining a control signal through operation, and sending the control signal to the electric control part; the electric control part is used for converting the control signal into electric quantity which can be executed by the electronic expansion valve, and the electronic expansion valve can be controlled by the electric quantity; the feedback information stored by the air conditioner controller at least comprises initialization completion state information and position information stored by the storage unit of the air conditioner controller.
9. The control system of the air conditioning system as claimed in claim 7, wherein the air conditioning controller is provided with a central processing module, the electric control part of the electronic expansion valve is provided with a LIN transceiver module, a central processing module, a driving control module and a driving module, wherein the LIN transceiver module transmits a detected signal on the LIN bus to the central processing module, the central processing module is responsible for receiving and analyzing control information from a main control board of the air conditioning system, transmitting an analyzed control signal for the electronic expansion valve to the driving control module, recording or storing current position information of the electronic expansion valve, analyzing a signal on the LIN bus to obtain an analysis result, and transmitting a feedback signal corresponding to the analysis result to the LIN bus through the LIN transceiver module, the storage unit is integrated with the central processing module of the electric control part, the control signal comprises the initialization switching signal, or the storage unit is arranged in a central processing module of the air conditioner controller;
or, the air conditioner controller is provided with a central processing module, the electric control part is provided with a drive control module and a drive module, wherein the central processing module of the air conditioner controller is responsible for receiving input information and/or sensor information, generating a control signal for the electronic expansion valve through operation, and sending the control signal to the drive control module to record or store the current position information of the electronic expansion valve, and a storage unit of the air conditioner controller is integrally arranged on the central processing module of the air conditioner controller;
the driving control module is used for receiving a control signal which is sent by the air conditioner controller or the central processing module of the electric control part and used for controlling the electronic expansion valve and transmitting the control signal to the driving module, the driving module provides an electric signal for the electronic coil of the electronic expansion valve, and the electric signal meets the requirement of the control signal that the electric signal can control the valve needle to act through acting on the electronic coil of the electronic expansion valve.
10. A control method of an air conditioning system is applied to a control system of the air conditioning system, the control system of the air conditioning system comprises an air conditioning controller and an electric control part for controlling the action of an electronic expansion valve, the control method of the air conditioning system comprises a control method for controlling the electronic expansion valve of the air conditioning system, and the control method of the electronic expansion valve comprises the following steps:
when the air conditioner controller starts a program for controlling the power failure of the electronic expansion valve, the air conditioner controller or the electric control part stores the initialized state and the position information of the electronic expansion valve through a built-in storage unit, and then controls the power failure of the electronic expansion valve so that the electronic expansion valve completes the initialized state switching at the power-on stage.
11. The method as claimed in claim 10, wherein when the air conditioner controller starts a program for controlling the power-on of the electronic expansion valve, the electronic expansion valve switches its own state to the initialized state and sets the stored position information to the current position value according to the initialized state and the position information of the electronic expansion valve stored in the storage unit, thereby completing the switching of the initialized state.
12. The method as claimed in claim 11, wherein when the air conditioner controller starts a program for controlling the power-on of the electronic expansion valve, the method comprises:
the air conditioner controller controls the electronic expansion valve to be powered on;
the air conditioner controller sends state switching and stored original position information to the electronic expansion valve through a local network connection control mode; then, the electronic control part of the electronic expansion valve switches the state according to the received initialization state switching information, and switches the state of the electronic expansion valve into an initialization completion state; the electronic control part of the electronic expansion valve receives the stored original position information, sets the stored original position information as a current position value, and completes the switching of the initialization state of the electronic expansion valve;
or the electronic control part reads a state value from a storage unit of the electronic control part to be in an initialization completion state, so that the state of the electronic expansion valve is in the initialization completion state; the position information read by the electric control part is set as the current position value of the electronic expansion valve;
or the air conditioner controller reads a state value from a storage unit of the air conditioner controller to be an initialization completion state, so that the state of the electronic expansion valve is the initialization completion state, the air conditioner controller reads a position value, and the read position value is set as a current position value;
and completing the switching of the initialization state of the electronic expansion valve.
13. The control method of the air conditioning system according to claim 12, wherein when the air conditioning controller starts a program for controlling the electronic expansion valve to power down, the control method comprises:
the air conditioner controller is communicated with the electronic expansion valve through a local network connection control mode, and a storage unit of the air conditioner controller stores the position and the initialization state of the electronic expansion valve; then controlling the electronic expansion valve to normally power down;
or the air conditioner controller sends a storage instruction through a local network connection control mode, and controls a storage unit of the electronic expansion valve to store the position and the initialization state of the electronic expansion valve; after the electronic expansion valve executes storage, sending a storage completion feedback signal to the air conditioner controller, and then controlling the electronic expansion valve to normally power down;
or the storage unit of the air conditioner controller stores the position and the initialization state of the electronic expansion valve and then controls the electronic expansion valve to normally power off.
14. The control method of the air conditioning system according to claim 13, wherein when the air conditioning controller starts a program for controlling the electronic expansion valve to power down, the control method comprises:
and the air conditioner controller or the electric control part sends an initialization control signal to the electronic expansion valve to control the electronic expansion valve to initialize, and then controls the storage unit of the air conditioner controller or the storage unit of the electric control part to store the state information and the position information fed back by the electronic expansion valve after the initialization is finished.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610169988.3A CN107228450B (en) | 2016-03-23 | 2016-03-23 | Air conditioning system, and control system and control method thereof |
| JP2018504128A JP6940478B2 (en) | 2016-03-23 | 2017-05-17 | Air conditioning control system and air conditioning system control method |
| US15/736,703 US10823448B2 (en) | 2016-03-23 | 2017-05-17 | Heat exchange system, air conditioning control system, and air conditioning system control method |
| EP17769495.7A EP3435004A4 (en) | 2016-03-23 | 2017-05-17 | Heat exchange system, air conditioning control system, and air conditioning system control method |
| PCT/CN2017/084687 WO2017162218A1 (en) | 2016-03-23 | 2017-05-17 | Heat exchange system, air conditioning control system, and air conditioning system control method |
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| CN201610169988.3A CN107228450B (en) | 2016-03-23 | 2016-03-23 | Air conditioning system, and control system and control method thereof |
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| CN107228450B true CN107228450B (en) | 2020-04-28 |
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| CN107813677A (en) * | 2017-11-01 | 2018-03-20 | 湖南长丰汽车空调有限公司 | A kind of automatic air condition HVAC assembly apparatus |
| CN113757436B (en) * | 2017-12-26 | 2024-04-30 | 株式会社不二工机 | Electric valve control device and electric valve device provided with same |
| CN110398083A (en) * | 2018-04-25 | 2019-11-01 | 杭州三花研究院有限公司 | Heat management system and its control method |
| CN110966811B (en) * | 2018-09-28 | 2021-08-31 | 浙江三花智能控制股份有限公司 | Control method and control system |
| CN110758100B (en) * | 2019-09-18 | 2021-08-06 | 北京汽车集团有限公司 | Vehicle control system and method and vehicle |
| CN112776556B (en) * | 2019-11-11 | 2023-04-14 | 宇通客车股份有限公司 | Vehicle fixed-displacement single-compressor double-area air conditioning system and liquid impact prevention method thereof |
| CN113280520A (en) * | 2021-04-26 | 2021-08-20 | 南京师范大学 | Fixed-frequency multi-connected freezing and refrigerating equipment |
| CN114110923A (en) * | 2021-11-29 | 2022-03-01 | 珠海格力电器股份有限公司 | Equipment control method, circuit, device, equipment and storage medium |
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