CN111174475A - Condensing unit dual-system closed-loop control method and device and condensing unit - Google Patents
Condensing unit dual-system closed-loop control method and device and condensing unit Download PDFInfo
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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
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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
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Abstract
The invention discloses a condensing unit dual-system closed-loop control method and device and a condensing unit. The indoor unit is responsible for data acquisition of a part of sensors in the condensing unit and control of a part of loads, and the method applied to the indoor unit comprises the following steps: acquiring data collected by a sensor governed by an internal machine; controlling the internal machine to enter a corresponding working mode according to the data; and communicating with the external unit according to the data so that the external unit executes corresponding operation according to the communication content. According to the invention, a control function is added in the inner unit, the data acquisition of part of sensors and the control of part of loads are divided into the responsibility of the inner unit, and the inner unit control system can communicate with the outer unit control system to share data, so that the double-system cooperative closed-loop control is realized through the inner unit control system and the outer unit control system, the task load of the outer unit is reduced, the real-time performance of unit control is improved, and the operation stability and the operation efficiency of the unit are further ensured; meanwhile, the autonomous decision-making capability of the internal machine is increased, so that the internal machine is not used as load output equipment.
Description
Technical Field
The invention relates to the technical field of units, in particular to a condensing unit dual-system closed-loop control method and device and a condensing unit.
Background
In the conventional cold chain equipment such as a small refrigeration house, a refrigerator car and the like in the market at present, an integrated control system of the cold chain equipment generally runs on a main control board of an external unit of a condensing unit, and the integrated control system needs to update temperature values, pressure values and abnormal alarm values to a manual operator and remote control equipment and receive instructions of the manual operator and the remote control equipment while collecting various pressures and temperatures and controlling loads.
With the increase of the task amount of the control system, the real-time performance of the system is undoubtedly reduced, and the stability and the operation efficiency of the condensing unit are further influenced. In addition, if the external unit and the internal unit of the unit have communication faults, the internal unit cannot make an autonomous decision.
Aiming at the problem that the condensing unit in the prior art is controlled by an outer unit main control board to cause the reduction of the instantaneity and the stability of the condensing unit when the task amount is large, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a condensing unit dual-system closed-loop control method and device and a condensing unit, and aims to solve the problem that in the prior art, the condensing unit depends on an outer unit main control board to control, so that the instantaneity and stability of the condensing unit are reduced when the workload is large.
In order to solve the technical problem, an embodiment of the present invention provides a method for controlling a condensing unit, where the method is applied to an internal unit, and the internal unit is responsible for data acquisition of a partial sensor in the condensing unit and control of a partial load, and the method includes: acquiring data collected by a sensor governed by the internal machine; controlling the internal machine to enter a corresponding working mode according to the data; and communicating with an external unit according to the data so that the external unit executes corresponding operation according to communication content.
Optionally, controlling the internal machine to enter a corresponding working mode according to the data includes: if the data is valid, determining a corresponding working mode according to the data, and controlling the load governed by the internal machine to execute an action matched with the working mode; and if the data is invalid, determining a fault protection mode corresponding to the sensor for collecting the invalid data, and controlling the load administered by the internal machine to execute an action matched with the fault protection mode.
Optionally, the communicating with the external unit according to the data includes: if the data is valid, the data is sent to the external machine; and if the data is invalid, sending sensor fault information to the external machine.
Optionally, after acquiring data collected by the sensor managed by the internal machine, the method further includes: judging whether the sensor fails according to the data; if the sensor fails, determining that the data is invalid; if the sensor is not faulty, determining that the data is valid.
Optionally, determining whether the sensor fails according to the data includes: judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents; if so, determining that the sensor is faulty.
Optionally, the method further includes: receiving mode identification information sent by the external unit; and controlling the internal machine to enter a working mode corresponding to the mode identification information according to the mode identification information.
The embodiment of the invention also provides a condensing unit control method, wherein the inner unit is responsible for data acquisition of a part of sensors in the condensing unit and control of a part of loads, the method is applied to the outer unit, and the method comprises the following steps: receiving control information; controlling the outdoor unit to enter a corresponding working mode according to the control information; and if the working mode is related to the load governed by the internal machine, sending mode identification information to the internal machine so that the internal machine executes corresponding control operation according to the mode identification information.
Optionally, the control information includes at least one of: the data collected by the sensor governed by the external machine, the information sent by the manual operator and the information sent by the remote equipment.
Optionally, controlling the external unit to enter a corresponding working mode according to the control information includes: if the control information is data collected by a sensor governed by the external machine, judging whether the sensor fails according to the collected data; if the sensor is not in fault, determining a corresponding working mode according to the acquired data, and controlling the load governed by the external machine to execute an action matched with the working mode; and if the sensor fails, determining a fault protection mode corresponding to the failed sensor, and controlling the load governed by the external machine to execute an action matched with the fault protection mode.
Optionally, the method further includes: if the sensor is not in fault, the acquired data are sent to the manual operator and/or the remote equipment; and if the sensor fails, sending mode identification information of a fault protection mode to the manual operator and/or the remote equipment.
Optionally, determining whether the sensor fails according to the acquired data includes: judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents; if so, determining that the sensor is faulty.
Optionally, the method further includes: receiving communication content sent by the internal unit, wherein the communication content comprises: data or sensor fault information collected by a sensor governed by the internal machine; judging whether the communication content is related to the load governed by the external unit; if the communication content is related to the load governed by the external machine, determining a corresponding working mode according to the communication content, controlling the load governed by the external machine to execute an action matched with the working mode, and sending the communication content to a manual operator and/or a remote device; and if the communication content is not related to the load governed by the external machine, sending the communication content to the manual operator and/or the remote equipment.
The embodiment of the invention also provides a control device of a condensing unit, which is applied to an inner machine, wherein the inner machine is responsible for data acquisition of partial sensors in the condensing unit and control of partial load, and the device comprises: the acquisition module is used for acquiring data acquired by the sensors managed by the internal machine; the first control module is used for controlling the internal machine to enter a corresponding working mode according to the data; and the first communication module is used for communicating with an external unit according to the data so that the external unit executes corresponding operation according to communication content.
The embodiment of the invention also provides a condensing unit control device, wherein an inner unit is responsible for data acquisition of a partial sensor and control of a partial load in a condensing unit, and the device is applied to an outer unit and comprises: the receiving module is used for receiving control information; the second control module is used for controlling the outdoor unit to enter a corresponding working mode according to the control information; and the second communication module is used for sending mode identification information to the internal machine if the working mode is related to the load governed by the internal machine, so that the internal machine executes corresponding control operation according to the mode identification information.
The embodiment of the present invention further provides a condensing unit, including: an inner unit and an outer unit; the internal machine is responsible for data acquisition of a part of sensors in the condensing unit and control of a part of loads; the outdoor unit is responsible for data acquisition of another part of sensors in the condensing unit and control of another part of loads; the internal machine comprises a condensing unit control device on the internal machine side in the embodiment of the invention, and the condensing unit control device in the internal machine is connected with a sensor and a load managed by the internal machine; the outdoor unit comprises a condensing unit control device on the side of the outdoor unit in the embodiment of the invention, and the condensing unit control device in the outdoor unit is connected with a sensor and a load governed by the outdoor unit; and the condensing unit control device in the inner machine is connected with the condensing unit control device in the outer machine through a communication line.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements a method for controlling a condensing unit on an internal machine side as in an embodiment of the present invention or implements a method for controlling a condensing unit on an external machine side as in an embodiment of the present invention.
By applying the technical scheme of the invention, a control function is added in the inner machine, the data acquisition of part of sensors and the control of part of loads are divided into the responsibility of the inner machine, and the control system of the inner machine can communicate with the control system of the outer machine to share data, so that the double-system cooperative closed-loop control is realized through the control system of the inner machine and the control system of the outer machine, the task load of the outer machine can be reduced, the real-time performance of the unit control is improved, and the operation stability and the operation efficiency of the unit are further ensured; meanwhile, the autonomous decision-making capability of the internal machine is increased, so that the internal machine is not used as load output equipment.
Drawings
Fig. 1 is a flowchart of a control method for a condensing unit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control system of an internal unit of a condensing unit according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an internal control of a condensing unit according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method for a condensing unit according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of an external unit control system of a condensing unit according to a second embodiment of the present invention;
fig. 6 is a flowchart of an external machine control of a condensing unit according to a second embodiment of the present invention;
fig. 7 is a block diagram of a control device of a condensing unit according to a third embodiment of the present invention;
fig. 8 is a block diagram of a control device of a condensing unit according to a fourth embodiment of the present invention;
fig. 9 is a schematic diagram of dual system communication between the internal unit and the external unit of the condensing unit according to the fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The existing condensing unit is controlled by an outer unit main control board, so that the real-time performance and the stability of the condensing unit are reduced when the task amount is large. Therefore, the control system is added into the internal machine, the data acquisition of part of the sensors and the control of part of the load are divided into the responsibility of the internal machine, the control system of the internal machine can communicate with the control system of the external machine, so that the double-system closed-loop control is realized through the control system of the internal machine and the control system of the external machine, and the task load of the external machine can be reduced; meanwhile, the autonomous decision-making capability of the internal machine is increased.
The following description is made with reference to the drawings and examples.
Example one
The embodiment provides a control method of a condensing unit, which is applied to an internal unit and can be specifically executed by an internal unit control system or an internal unit main control board in the internal unit. The internal machine is responsible for data acquisition of partial sensors in the condensing unit and control of partial load, for example, the sensors and the load installed in the internal machine can be divided into the internal machine administration preferentially. The number of the sensors governed by the internal machine is at least one, and the number of the loads governed by the internal machine is at least one. And the outdoor unit is responsible for data acquisition of another part of sensors in the condensing unit and control of another part of loads.
Fig. 1 is a flowchart of a control method for a condensing unit according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
and S101, acquiring data collected by a sensor governed by an internal machine.
And S102, controlling the internal machine to enter a corresponding working mode according to the data.
And S103, communicating with the external unit according to the data so that the external unit executes corresponding operation according to the communication content.
The sensors may collect data according to settings, such as real-time data collection, or data collection according to a preset period, or data collection based on instructions. The working modes of the unit comprise: an operation mode and a fault protection mode, the operation mode comprising: a cooling mode, a defrosting mode, a standby mode, a shutdown mode and the like. The fault protection modes include: the system comprises a shutdown protection mode and a non-shutdown protection mode, wherein the shutdown protection mode means that all loads do not run, and some loads in the non-shutdown protection mode need to run. Different load operation may be required in different operation modes, for example, some operation modes do not require load operation managed by the internal machine. Each working mode of the unit can have respective unique identification. The execution sequence of steps S102 and S103 is not distinct, and may be executed simultaneously.
Illustratively, the inner unit governs the warehouse temperature sensor, if the warehouse temperature acquired by the warehouse temperature sensor reaches the target temperature, the refrigerating is not performed, and if the working mode of the unit is determined to be changed into the standby mode, the unit is controlled to enter the standby mode.
According to the control method of the condensing unit, the control function is added in the inner unit, the data acquisition of part of sensors and the control of part of loads are divided into the responsibility of the inner unit, the control system of the inner unit can communicate with the control system of the outer unit to share data, so that the double-system cooperative closed-loop control is realized through the control system of the inner unit and the control system of the outer unit, the task load of the outer unit can be reduced, the real-time performance of unit control is improved, and the operation stability and the operation efficiency of the unit are further ensured; meanwhile, the autonomous decision-making capability of the internal machine is increased, so that the internal machine is not used as load output equipment.
In an optional embodiment, controlling the internal unit to enter a corresponding operating mode according to the data includes: if the data is valid, determining a corresponding working mode according to the data, and controlling the load governed by the internal machine to execute an action matched with the working mode; and if the data is invalid, determining a fault protection mode corresponding to the sensor for collecting the invalid data, and controlling the load governed by the internal machine to execute an action matched with the fault protection mode.
The determining of the corresponding target working mode according to the data is performed based on a unit operation strategy, for example, if the collected reservoir temperature is greater than or equal to a preset temperature, it is determined that a refrigeration mode needs to be entered, that is, the target working mode is the refrigeration mode, and if the collected reservoir temperature is less than the preset temperature, a current mode, for example, a standby mode is maintained, and at this time, the target working mode is the standby mode. At this time, the internal machine needs to control the load in the jurisdiction range of the internal machine to execute the action matched with the target working mode, for example, the evaporation fan operates in the cooling mode, and the defrosting electric heating is turned off.
If the data are invalid, the sensor for collecting the data fails, and the unit needs to enter a fault protection mode, so that the unit is prevented from being damaged by continuous operation. The failure protection modes for different sensor failures are different. After the corresponding fault protection mode is determined, the internal machine needs to control the load in the jurisdiction range of the internal machine to execute the action matched with the fault protection mode.
In the embodiment, the internal machine can realize autonomous decision and control based on the data acquired by the sensors governed by the internal machine, independently process some abnormal conditions and enter fault protection.
In an optional embodiment, the communicating with the external unit according to the data includes: if the data is valid, sending the data to the external machine; and if the data is invalid, sending sensor fault information to the external machine.
And the data is sent to the outdoor unit, and the outdoor unit can send the data to the manual operator and/or the remote equipment so as to realize data synchronization and updating and facilitate the user to check. If the data is related to the load governed by the external machine, the external machine also determines a corresponding working mode according to the data and controls the load governed by the external machine to execute an action matched with the working mode, so that the external machine enters the working mode. And meanwhile, if the fault protection mode corresponding to the sensor fault information needs the action of the load governed by the external machine, the external machine also controls the load governed by the external machine to execute the action matched with the fault protection mode so as to enable the external machine to enter the fault protection mode.
In an optional embodiment, after acquiring data collected by the sensor managed by the internal device, the method further includes: judging whether the sensor fails according to the data; if the sensor fails, determining that the data is invalid; if the sensor is not faulty, the data is determined to be valid.
Specifically, the determining whether the sensor has a fault according to the data includes: judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents; if so, determining that the sensor is faulty.
Wherein, the preset content at least comprises: the maximum or minimum that the sensor can sense, and certain characters (such as ERR indicating no temperature acquisition), etc. If the data collected by the sensor within the preset time length or the data collected by the sensor for the preset times belong to the preset content, the fault of the sensor can be determined, and the collected data is invalid. According to the embodiment, whether the sensor fails is determined through the data acquired by the sensor, and the determination mode is simple and reliable.
It should be noted that the data collected by the sensor is analog quantity, and the collected data can be processed to convert the analog quantity into digital quantity, and then applied to a specific internal control process.
In an optional embodiment, the method may further include: receiving mode identification information sent by an external unit; and controlling the internal machine to enter a working mode corresponding to the mode identification information according to the mode identification information.
The mode identification information sent by the external unit refers to identification information of a target working mode currently determined by the external unit according to the relevant information. After the internal machine receives the mode identification information, the load governed by the internal machine can be correspondingly controlled to enter a corresponding mode, and the cooperative control of the internal machine and the external machine is realized.
The RS485 interface can be adopted for communication between the inner machine and the outer machine, the differential signal is used for half-duplex communication to prevent external signal interference, and the software communication protocol can adopt an industrial-level ModBus RTU (Remote Terminal Unit) protocol to carry out data transmission, so that stable communication of the inner machine and the outer machine is realized.
In addition, if a communication fault between the internal machine and the external machine is detected, the corresponding internal and external machine communication fault processing mode can be determined by combining the structural characteristics of the internal and external machine systems, for example, the machine is stopped, and damage caused by improper operation of the machine set is avoided. Specifically, the external unit may send a data packet to the internal unit at regular intervals, and if the reply of the internal unit is not received within a preset time, the communication fault is determined. In a specific application, both the internal unit and the external unit can detect communication faults and respectively perform related operations to deal with the communication faults.
Exemplarily, referring to fig. 2, based on the overall analysis of the condensing unit, two loads, namely, a storehouse temperature sensor, a defrosting temperature sensor, and an air supply temperature sensor, an evaporation fan, and defrosting electric heating, are planned into an internal unit control system, and the system is structurally optimized, so that the sensors transmit data to the internal unit control system, the loads are controlled by the internal unit control system, and meanwhile, the internal unit control system and the external unit control system can perform bidirectional communication through a communication module.
Referring to the internal machine control flow shown in fig. 3, the internal machine control system acquires temperature data collected by each managed sensor, determines whether a sensor fails, and controls the internal machine to enter a corresponding fault protection mode if a sensor fails, and simultaneously sends sensor fault information to the external machine control system; if no sensor fails, analog quantity acquired by the sensor is calculated and processed and converted into digital quantity, then the internal unit is controlled to enter a corresponding working mode according to the digital quantity, and meanwhile temperature data acquired by the sensor is sent to an external unit control system.
Therefore, through the acquisition and processing of the temperature, the inner main board enters different working modes, the load governed by the inner machine is controlled to execute the action matched with the working modes, and if the sensor governed by the inner machine fails, the inner main board enters a corresponding fault protection mode; meanwhile, temperature data or sensor fault information is sent to the outdoor unit through the communication module, and the dual-system cooperative operation is achieved.
Example two
The embodiment provides a method for controlling a condensing unit, which is applied to an outdoor unit and can be specifically executed by an outdoor unit control system or an outdoor unit main control board in the outdoor unit. The inner machine is responsible for data acquisition of a part of sensors in the condensing unit and control of a part of loads, and the outer machine is responsible for data acquisition of another part of sensors in the condensing unit and control of another part of loads. For technical terms which are the same as or related to those in the first embodiment and are not described in detail in the present embodiment, please refer to the explanation of the first embodiment, and the description of the present embodiment is omitted.
As shown in fig. 4, the method includes:
s401, receiving control information;
s402, controlling the external unit to enter a corresponding working mode according to the control information;
and S403, if the working mode is related to the load governed by the internal machine, sending mode identification information to the internal machine so that the internal machine executes corresponding control operation according to the mode identification information. If the load managed by the internal machine is irrelevant, the information does not need to be sent to the internal machine.
The control information includes at least one of: the data collected by the sensor managed by the external unit, the information sent by the manual operator and the information sent by the remote equipment. The information sent by the hand operator and the information sent by the remote device can be control commands.
According to the control method of the condensing unit, the control function is added in the inner unit, the data acquisition of part of sensors and the control of part of loads are divided into the responsibility of the inner unit, the inner unit and the outer unit respectively determine working modes, and if the working mode determined by the outer unit is related to the load governed by the inner unit, mode identification information is sent to the inner unit, so that the inner unit executes corresponding control operation according to the mode identification information, the data sharing and the cooperative closed-loop control of the inner unit and the outer unit are realized, the task load of the outer unit can be reduced, the real-time performance of unit control is improved, and the operation stability and the operation efficiency of the unit are further ensured; meanwhile, the autonomous decision-making capability of the internal machine is increased, so that the internal machine is not used as load output equipment.
In an optional embodiment, the controlling the external unit to enter the corresponding operation mode according to the control information includes: if the control information is data collected by a sensor governed by an external machine, judging whether the sensor fails according to the collected data; if the sensor is not in fault, determining a corresponding working mode according to the acquired data, and controlling the load governed by the external machine to execute an action matched with the working mode; and if the sensor fails, determining a fault protection mode corresponding to the failed sensor, and controlling the load governed by the external machine to execute an action matched with the fault protection mode. In the embodiment, the outer machine carries out decision and control based on the data collected by the sensors managed by the outer machine, and the task amount of the outer machine is reduced due to the sharing of the inner machine.
Furthermore, if the sensor is not in fault, the acquired data can be sent to a manual operator and/or remote equipment; if the sensor fails, the mode identification information of the fault protection mode can be sent to the manual operator and/or the remote equipment. The data synchronization and update are realized, and the fault condition can be informed to the user.
Specifically, judging whether the sensor fails according to the acquired data includes: judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents; if so, determining that the sensor is faulty.
Wherein, the preset content at least comprises: the maximum or minimum that the sensor can sense, and certain characters (such as ERR indicating no temperature acquisition), etc. If the data collected by the sensor within the preset time length or the data collected by the sensor for the preset times belong to the preset content, the fault of the sensor can be determined, and the collected data is invalid. According to the embodiment, whether the sensor fails is determined through the data acquired by the sensor, and the determination mode is simple and reliable.
It should be noted that the data collected by the sensor is analog quantity, and the collected data can be processed to convert the analog quantity into digital quantity, and then applied to a specific external machine control flow.
In an optional embodiment, the method may further include: receiving communication content sent by an internal unit, wherein the communication content comprises: data or sensor fault information collected by a sensor governed by an internal machine; judging whether the communication content is related to the load governed by the external machine; if the communication content is related to the load governed by the external machine, determining a corresponding working mode according to the communication content, controlling the load governed by the external machine to execute an action matched with the working mode, and sending the communication content to the manual operator and/or the remote equipment; and if the communication content is not related to the load governed by the external machine, transmitting the communication content to the hand operator and/or the remote equipment.
The outer machine receives the communication content sent by the inner machine, and can send the communication content to the manual operator and/or the remote equipment, so that data updating and synchronization and fault notification are realized. If the communication content is related to the load governed by the external machine, the external machine also performs corresponding control according to the communication content, so that the cooperative control of the internal machine and the external machine is realized.
Can adopt the RS485 interface to communicate between interior machine and the outer machine, use differential signal to carry out half-duplex communication and prevent the external signal interference, software communication protocol can adopt industry level ModBus RTU protocol to carry out data transmission, realizes the stable communication of interior outer machine.
In addition, if a communication fault between the internal machine and the external machine is detected, the corresponding internal and external machine communication fault processing mode can be determined by combining the structural characteristics of the internal and external machine systems, for example, the machine is stopped, and damage caused by improper operation of the machine set is avoided. Specifically, the external unit may send a data packet to the internal unit at regular intervals, and if the reply of the internal unit is not received within a preset time, the communication fault is determined. In a specific application, both the internal unit and the external unit can detect communication faults and respectively perform related operations to deal with the communication faults.
Exemplarily, referring to fig. 5, temperature sensors other than the storehouse temperature sensor, the defrosting temperature sensor, and the supply air temperature sensor are planned to be administered to the outdoor unit control system based on the overall analysis of the condensing unit, for example, an intake temperature sensor, an exhaust temperature sensor, an ambient temperature sensor, and the like; and planning pressure sensors (such as a system high pressure sensor and a system low pressure sensor) to an external machine control system; in addition, the amount of detection of the load operation is also planned to be governed by the external machine control system, for example, when the electromagnetic valve needs to be controlled to the target opening degree at present, after the electromagnetic valve is controlled to operate, whether the opening degree of the electromagnetic valve really reaches the target opening degree needs to be detected, and the detection result is fed back to the external machine control system. The load governed by the external machine control system may include: compressor, solenoid valve, electronic expansion valve and condensation fan etc.. The outer machine control system and the inner machine control system can carry out bidirectional communication through the communication module.
Referring to the outdoor unit control flow path shown in fig. 6, the outdoor unit control system collects the related temperature and pressure quantities according to its jurisdiction, the collected data is used as the input quantities of the outdoor unit control system, the outdoor unit control system processes the input quantities (for example, converts analog quantities into digital quantities through calculation), enters a corresponding working mode according to the processed data, controls the governed load to execute the action matched with the working mode, and updates the data to the manual operator and/or the remote device; if the sensor fails, the corresponding fault protection mode is entered, and mode identification information of the fault protection mode is updated to the hand operator and/or the remote equipment. Meanwhile, the outdoor unit control system can enter a corresponding working mode (an operation mode or a fault protection mode) according to data sent by the manual operator and/or the remote equipment. If the working mode determined according to the sensor data, the manual operator data and the remote equipment data is related to the load governed by the internal machine, the mode identification information is sent to the internal machine control system, so that the internal machine controls the load governed by the internal machine according to the mode identification information, the dual-system cooperative closed-loop control is realized, and if the working mode is not related to the load governed by the internal machine, the information does not need to be sent to the internal machine.
EXAMPLE III
The embodiment provides a condensing unit control device, which is applied to an internal machine and can be used for realizing the condensing unit control method in the first embodiment. The inner machine is responsible for data acquisition of a part of sensors in the condensing unit and control of a part of loads, and the outer machine is responsible for data acquisition of another part of sensors in the condensing unit and control of another part of loads. The device can be realized by software and/or hardware, and the device can be generally integrated in an internal machine main control board. In consideration of the fact that scenes such as a small refrigeration house are relatively humid, the moisture resistance needs to be considered for selecting devices in the main control panel of the internal machine.
Fig. 7 is a block diagram of a control device of a condensing unit according to a third embodiment of the present invention, and as shown in fig. 7, the control device includes:
the acquisition module 71 is configured to acquire data acquired by the sensors managed by the internal machine;
the first control module 72 is used for controlling the internal unit to enter a corresponding working mode according to the data;
and the first communication module 73 is configured to communicate with an external unit according to the data, so that the external unit executes corresponding operations according to communication contents.
Optionally, the first control module 72 includes:
the first control unit is used for determining a corresponding working mode according to the data if the data is valid, and controlling the load governed by the internal machine to execute an action matched with the working mode;
and the second control unit is used for determining a fault protection mode corresponding to a sensor for collecting invalid data if the data are invalid, and controlling the load governed by the internal machine to execute an action matched with the fault protection mode.
Optionally, the first communication module 73 includes:
the first communication unit is used for sending the data to the external unit if the data is valid;
and the second communication unit is used for sending sensor fault information to the external unit if the data is invalid.
Optionally, the apparatus further comprises: the judging module is used for judging whether the sensor fails or not according to the data after acquiring the data acquired by the sensor governed by the internal machine; if the sensor fails, determining that the data is invalid; if the sensor is not faulty, determining that the data is valid.
Optionally, the determining module is specifically configured to: judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents; if so, determining that the sensor is faulty.
Optionally, the first communication module 73 is further configured to receive the mode identification information sent by the external unit; the first control module 72 is further configured to control the internal unit to enter a working mode corresponding to the mode identification information according to the mode identification information.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
Example four
The embodiment provides a condensing unit control device, which is applied to an external unit and can be used for implementing the condensing unit control method described in the second embodiment. The internal machine is responsible for data acquisition of a part of sensors in the condensing unit and control of a part of loads; and the external unit is responsible for data acquisition of another part of sensors in the condensing unit and control of another part of loads. The device can be realized by software and/or hardware, and the device can be generally integrated in an outer machine main control board.
Fig. 8 is a block diagram of a control device of a condensing unit according to a fourth embodiment of the present invention, and as shown in fig. 8, the control device includes:
a receiving module 81, configured to receive control information;
the second control module 82 is configured to control the external unit to enter a corresponding working mode according to the control information;
and the second communication module 83 is configured to send mode identification information to the internal unit if the working mode is related to a load governed by the internal unit, so that the internal unit executes a corresponding control operation according to the mode identification information.
Optionally, the control information includes at least one of: the data collected by the sensor governed by the external machine, the information sent by the manual operator and the information sent by the remote equipment.
Optionally, the second control module 82 includes:
the judging unit is used for judging whether the sensor fails according to the acquired data if the control information is the data acquired by the sensor governed by the external machine;
the third control unit is used for determining a corresponding working mode according to the acquired data and controlling the load governed by the external machine to execute an action matched with the working mode if the sensor is not in fault;
and the fourth control unit is used for determining a fault protection mode corresponding to the failed sensor and controlling the load governed by the external machine to execute the action matched with the fault protection mode if the sensor fails.
Optionally, the apparatus further comprises: the transmitting module is used for transmitting the acquired data to the manual operator and/or the remote equipment if the sensor is not in fault; and if the sensor fails, sending mode identification information of a fault protection mode to the manual operator and/or the remote equipment.
Optionally, the determining unit is specifically configured to: judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents; if so, determining that the sensor is faulty.
Optionally, the second communication module 83 is further configured to receive communication content sent by the internal unit, where the communication content includes: data or sensor fault information collected by a sensor governed by the internal machine;
correspondingly, the device further comprises:
the content judging module is used for judging whether the communication content is related to the load governed by the external machine;
the processing module is used for determining a corresponding working mode according to the communication content if the communication content is related to the load governed by the external machine, controlling the load governed by the external machine to execute an action matched with the working mode, and sending the communication content to a manual operator and/or a remote device; and if the communication content is not related to the load governed by the external machine, sending the communication content to the manual operator and/or the remote equipment.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
EXAMPLE five
The embodiment provides a condensing unit, which comprises an inner unit and an outer unit, wherein the inner unit is responsible for data acquisition of a part of sensors and control of a part of loads in the condensing unit, and the outer unit is responsible for data acquisition of another part of sensors and control of another part of loads in the condensing unit. The inner machine comprises a condensing unit control device in the third embodiment of the invention, and the condensing unit control device in the inner machine is connected with a sensor and a load managed by the inner machine. The outdoor unit comprises the condensing unit control device in the fourth embodiment of the invention, and the condensing unit control device in the outdoor unit is connected with the sensor and the load governed by the outdoor unit. And the condensing unit control device in the inner machine is connected with the condensing unit control device in the outer machine through a communication line.
Fig. 9 is a schematic view of dual system communication between the internal unit and the external unit of the condensing unit according to the fifth embodiment of the present invention, and as shown in fig. 9, the internal unit control system is responsible for data acquisition of sensors installed in the internal unit and control of a load, such as a warehouse temperature sensor, a defrosting temperature sensor, an air supply temperature sensor, an evaporation fan, and electric defrosting heating. The outdoor unit control system is responsible for data acquisition of sensors outside the indoor unit and control of loads, for example, temperature sensors other than a storehouse temperature sensor, a defrosting temperature sensor, and an air supply temperature sensor, such as an intake air temperature sensor, an exhaust air temperature sensor, and an ambient temperature sensor, a system high pressure sensor and a system low pressure sensor, and a detected amount of load actions. Therefore, the wiring connection among the internal machine and the external machine to the storehouse temperature sensor, the air supply temperature sensor and the defrosting temperature sensor can be reduced, and the wiring connection among the internal machine and the external machine to the two loads of the evaporation fan and the defrosting electric heating can be reduced. Only one communication shielding wire between the internal machine and the external machine needs to be added, so that the cost is reduced to a great extent, and the electric wiring of the internal machine and the external machine is optimized. Specifically, the control system of the internal unit of the condensing unit sends data collected by a sensor governed by the internal unit and sensor fault information to the control system of the external unit of the condensing unit through the communication shielding wire. And the condensing unit external machine control system sends the mode identification information to the condensing unit internal machine control system through the communication shielding wire. The dual systems of the inner machine and the outer machine are communicated, so that the data sharing of the system of the inner machine and the outer machine is realized, the task load of the outer machine is reduced, the real-time performance and the stability of the operation of the machine set are improved, and the autonomous decision of the inner machine is also increased.
The communication interface must satisfy stability to and handle in time the outer quick-witted communication trouble of internal-external, prevent that the system from making mistakes that operates. The RS485 interface can be used for communication between the inner unit and the outer unit, and the differential signals are used for half-duplex communication to prevent external signal interference. The software communication protocol can adopt an industrial-level ModBus RTU protocol to carry out data transmission so as to realize stable communication.
When the system is specifically implemented, program framework design, program compiling and complete machine electric wiring can be carried out on an inner machine and an outer machine, the outer machine main control board of the condensation machine set is utilized, the inner machine program is burnt and installed in the inner machine, then complete machine experimental function testing is carried out, hardware circuit design of the inner machine main control board and the outer machine main control board is carried out after the testing is carried out, and batch trial production can be carried out after the main control board hardware experiment is passed.
EXAMPLE six
The present embodiment provides a computer-readable storage medium on which a computer program is stored which, when being executed by a processor, implements the method for controlling a condensing unit on the inner machine side according to the first embodiment of the present invention or implements the method for controlling a condensing unit on the outer machine side according to the second embodiment of the present invention.
In summary, the embodiments of the present invention reasonably arrange the pressure and temperature acquisition and load control of the internal and external units of the condensing unit, increase the system control of the internal units of the condensing unit, optimize the software and hardware structural framework and electrical wiring of the unit, and reduce the cost; and a stable industrial-level communication protocol is adopted to exchange data of the internal and external machines, so that stable communication of the internal and external machines of the condensing unit is realized. Compared with the single-system control of the condensing unit in the prior art, the condensing unit in the embodiment of the invention realizes the two-way coordination closed-loop control of the inner machine and the outer machine according to the real-time communication data mutually transmitted by the inner machine and the outer machine, thereby improving the stability and the quality of the condensing unit; and the autonomous decision-making performance of the condensing unit internal unit is improved, and the running efficiency of the unit external unit is improved.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (16)
1. A control method of a condensing unit is characterized in that the method is applied to an inner unit which is responsible for data acquisition of partial sensors in the condensing unit and control of partial load, and the method comprises the following steps:
acquiring data collected by a sensor governed by the internal machine;
controlling the internal machine to enter a corresponding working mode according to the data;
and communicating with an external unit according to the data so that the external unit executes corresponding operation according to communication content.
2. The method according to claim 1, wherein controlling the internal machine to enter a corresponding operating mode according to the data comprises:
if the data is valid, determining a corresponding working mode according to the data, and controlling the load governed by the internal machine to execute an action matched with the working mode;
and if the data is invalid, determining a fault protection mode corresponding to the sensor for collecting the invalid data, and controlling the load administered by the internal machine to execute an action matched with the fault protection mode.
3. The method of claim 1, wherein communicating with an external unit according to the data comprises:
if the data is valid, the data is sent to the external machine;
and if the data is invalid, sending sensor fault information to the external machine.
4. The method of claim 1, further comprising, after acquiring the data collected by the internal management sensor:
judging whether the sensor fails according to the data;
if the sensor fails, determining that the data is invalid;
if the sensor is not faulty, determining that the data is valid.
5. The method of claim 4, wherein determining whether the sensor is malfunctioning based on the data comprises:
judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents;
if so, determining that the sensor is faulty.
6. The method of claim 1, further comprising:
receiving mode identification information sent by the external unit;
and controlling the internal machine to enter a working mode corresponding to the mode identification information according to the mode identification information.
7. A control method of a condensing unit is characterized in that an inner unit is responsible for data acquisition of a partial sensor and control of a partial load in the condensing unit, and the method is applied to the outer unit and comprises the following steps:
receiving control information;
controlling the outdoor unit to enter a corresponding working mode according to the control information;
and if the working mode is related to the load governed by the internal machine, sending mode identification information to the internal machine so that the internal machine executes corresponding control operation according to the mode identification information.
8. The method of claim 7, wherein the control information comprises at least one of: the data collected by the sensor governed by the external machine, the information sent by the manual operator and the information sent by the remote equipment.
9. The method of claim 8, wherein controlling the external unit to enter a corresponding operation mode according to the control information comprises:
if the control information is data collected by a sensor governed by the external machine, judging whether the sensor fails according to the collected data;
if the sensor is not in fault, determining a corresponding working mode according to the acquired data, and controlling the load governed by the external machine to execute an action matched with the working mode;
and if the sensor fails, determining a fault protection mode corresponding to the failed sensor, and controlling the load governed by the external machine to execute an action matched with the fault protection mode.
10. The method of claim 9, further comprising:
if the sensor is not in fault, the acquired data are sent to the manual operator and/or the remote equipment;
and if the sensor fails, sending mode identification information of a fault protection mode to the manual operator and/or the remote equipment.
11. The method of claim 9, wherein determining whether the sensor is malfunctioning based on the collected data comprises:
judging whether the data collected by the same sensor continuously received within the preset time length or the preset times are all preset contents;
if so, determining that the sensor is faulty.
12. The method of claim 7, further comprising:
receiving communication content sent by the internal unit, wherein the communication content comprises: data or sensor fault information collected by a sensor governed by the internal machine;
judging whether the communication content is related to the load governed by the external unit;
if the communication content is related to the load governed by the external machine, determining a corresponding working mode according to the communication content, controlling the load governed by the external machine to execute an action matched with the working mode, and sending the communication content to a manual operator and/or a remote device;
and if the communication content is not related to the load governed by the external machine, sending the communication content to the manual operator and/or the remote equipment.
13. A control device for a condensing unit, characterized in that said device is applied to an internal machine which is responsible for data acquisition of partial sensors and control of partial loads in the condensing unit, said device comprising:
the acquisition module is used for acquiring data acquired by the sensors managed by the internal machine;
the first control module is used for controlling the internal machine to enter a corresponding working mode according to the data;
and the first communication module is used for communicating with an external unit according to the data so that the external unit executes corresponding operation according to communication content.
14. A condensing unit control device is characterized in that an inner unit is responsible for data acquisition of partial sensors in a condensing unit and control of partial load, the device is applied to an outer unit, and the device comprises:
the receiving module is used for receiving control information;
the second control module is used for controlling the outdoor unit to enter a corresponding working mode according to the control information;
and the second communication module is used for sending mode identification information to the internal machine if the working mode is related to the load governed by the internal machine, so that the internal machine executes corresponding control operation according to the mode identification information.
15. A condensing unit, comprising: an inner unit and an outer unit;
the internal machine is responsible for data acquisition of a part of sensors in the condensing unit and control of a part of loads;
the outdoor unit is responsible for data acquisition of another part of sensors in the condensing unit and control of another part of loads;
the inner machine comprises the condensing unit control device according to claim 13, and the condensing unit control device in the inner machine is connected with a sensor and a load managed by the inner machine;
the outdoor unit comprises the condensing unit control device of claim 14, and the condensing unit control device in the outdoor unit is connected with a sensor and a load managed by the outdoor unit;
and the condensing unit control device in the inner machine is connected with the condensing unit control device in the outer machine through a communication line.
16. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method of any one of claims 1 to 6 or carries out the method of any one of claims 7 to 12.
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Application publication date: 20200519 |