CN114704982B - Unit power-off starting method, unit controller and water chilling unit system - Google Patents
Unit power-off starting method, unit controller and water chilling unit system Download PDFInfo
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- CN114704982B CN114704982B CN202210325936.6A CN202210325936A CN114704982B CN 114704982 B CN114704982 B CN 114704982B CN 202210325936 A CN202210325936 A CN 202210325936A CN 114704982 B CN114704982 B CN 114704982B
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- 238000000034 method Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000001276 controlling effect Effects 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000011217 control strategy Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/37—Resuming operation, e.g. after power outages; Emergency starting
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The embodiment of the application provides a unit power-off starting method, a unit controller and a water chilling unit system, comprising the following steps: detecting an operation state of the compressor; when the unit is powered off, controlling the opening degrees of the regulating valves to be consistent with the opening degrees in the power off process and recording the running state of the compressor in the power off process; and when the unit is electrified, controlling the opening degrees of the regulating valves to be consistent with the opening degrees in the outage state, and controlling the compressor to start according to a set starting strategy according to the outage time length of the unit so as to recover the running state of the unit in the outage state. The unit power-off starting method can automatically start the running state to be in a power-off state, is intelligent, can adopt different starting strategies when power-off time is different, is intelligent, and therefore improves user experience.
Description
Technical Field
The embodiment of the application relates to the field of compressors, in particular to a unit power-off starting method, a unit controller and a water chilling unit system.
Background
With the development of economy, more and more buildings adopt a central air conditioning system. When the conventional centrifugal unit is powered off again, manual operation is needed to modify unit parameters and eliminate faults, so that the purpose of restarting the unit is realized, the unit cannot be started automatically, and particularly, operators are needed to reset a new running state according to the unit requirement after the power is off, so that the centrifugal unit is troublesome, the intelligent degree is low, and the user experience is poor.
Disclosure of Invention
The unit power-off starting method, the unit controller and the water chilling unit system are high in intelligent degree.
An aspect of the embodiments of the present application provides a method for starting a power failure of a unit, where the unit includes a compressor, an evaporator, a condenser, a UPS uninterruptible power supply, a unit controller and a plurality of regulating valves, where the compressor and the evaporator are connected through a pipeline, the plurality of regulating valves are located at different positions on the pipeline, the compressor is connected with the condenser, the condenser is connected with the evaporator, the UPS uninterruptible power supply is connected with the unit controller and the plurality of regulating valves, and is used to supply power to the unit controller when the unit is powered off, and the method for starting the power failure of the unit is applied to the unit controller, and includes:
detecting an operating state of the compressor;
when the unit is powered off, recording the running state of the compressor when the unit is powered off; and
When the unit is electrified, the opening degrees of the regulating valves are controlled to be consistent with the opening degrees in the outage process, and the compressor is controlled to be started according to a set starting strategy according to the outage duration of the unit, so that the compressor is restored to the running state in the outage process of the unit.
Optionally, the starting strategy includes a quick starting strategy and a normal starting strategy, and a time period when the compressor is started by using the quick starting strategy is shorter than a time period when the compressor is started by using the normal starting strategy;
and controlling the compressor to start according to a set starting strategy according to the power-off time length of the unit and the running state of the compressor during power off, wherein the method comprises the following steps:
if the power-off time length is within a first power-off time length range, controlling the compressor to be started quickly according to the quick starting strategy; and
And if the power-off time length exceeds the upper limit value of the first power-off time length range, controlling the compressor to be started normally according to the normal starting strategy.
Optionally, the first power-off duration range is divided into a first sub-range and a second sub-range; the unit power-off starting method further comprises the following steps: when the unit is electrified, if the power-off duration is in the second sub-range, communication is established with a compressor controller after time delay setting duration, and after the communication is established, the compressor is controlled to be started quickly according to the quick start strategy according to the power-off running state of the compressor.
Optionally, the unit power-off starting method further includes: and when the unit is electrified, if the power-off time length is within the first sub-range, the unit is in communication connection with the compressor controller, and the compressor is controlled to be started quickly according to the quick start strategy.
Optionally, the compressor includes a magnetic suspension compressor, and the first power-off duration range is greater than a duration of the compressor in a suspension state and less than a duration from a power-off time to a power exhaustion of the UPS; the first sub-range is less than a duration of the compressor from a hover state to a full stop.
Optionally, the unit power-off starting method includes:
and when the unit is electrified, if the power-off duration is smaller than the lower limit value of the first power-off duration range, continuously controlling the compressor to work according to a compressor control strategy when the power is off.
Optionally, the compressor includes at least a first compressor and a second compressor, and the power-off starting method of the unit further includes:
after the first compressor is started quickly, if the rotating speed of the first compressor reaches a rotating speed threshold value or the starting time of the first compressor reaches a time threshold value or the ambient temperature of the first compressor reaches a temperature threshold value, controlling the second compressor to be started quickly.
Another aspect of the embodiments of the present application provides a unit controller: the power failure starting method comprises one or more processors, and is used for realizing the power failure starting method of the unit.
Yet another aspect of an embodiment of the present application provides a computer-readable storage medium. The computer readable storage medium stores a program which, when executed by a processor, implements the power outage starting method of the unit as described above.
Yet another aspect of an embodiment of the present application further provides a water chiller system, including: the utility model provides a compressor, evaporimeter, condenser, UPS uninterrupted power source, a plurality of governing valve and the unit controller of claim 8, the compressor with the evaporimeter passes through the pipeline and links to each other, different positions on the pipeline are located to a plurality of governing valves, the compressor with the condenser is connected, the condenser with the evaporimeter links to each other, UPS uninterrupted power source with the unit controller a plurality of governing valve are connected, are used for when the unit outage for the unit controller power supply.
According to the machine set power-off starting method, the running state of the compressor during power-off can be recorded when the machine set is powered off, the opening degrees of the regulating valves are controlled to be consistent with the opening degrees during power-off during power-on of the machine set, and the compressor is controlled to be started according to the set starting strategy according to the length of the power-off time length, so that the running state of the machine set during power-off is restored, the running state before repeated manual setting of an operator can be avoided, the running state during power-off can be automatically started, the machine set power-off starting method is intelligent, different starting strategies can be adopted when the power-off time length is different, and the machine set power-off starting method is intelligent, so that user experience is improved.
Drawings
FIG. 1 is a schematic view of a unit of an air conditioner according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for starting a power-off of a unit according to the present application;
FIG. 3 is a specific flowchart of step S3 in the embodiment shown in FIG. 2;
FIG. 4 is a schematic block diagram of a crew controller according to one embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the accompanying claims.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
Fig. 1 is a schematic view of an air conditioning unit 1 according to an embodiment of the present application. Referring to fig. 1, in some embodiments, the unit 1 may be a water chiller, and the unit 1 includes: referring to fig. 1, the compressor 11 is connected to the evaporator 12 through a pipeline, the compressor 11 is connected to the condenser 13, the condenser 13 is connected to the evaporator 12 to form a closed system, the refrigerant circulates in a fluid state in the pipeline of the closed refrigeration system, heat is extracted from the evaporator 12, and heat is released from the condenser 13, so that the purpose of refrigeration is achieved, and the heating process is opposite. In some embodiments, since the plurality of regulating valves 14 are disposed at different positions on the pipeline, the refrigerating capacity of the system, such as refrigerating capacity per unit time, can be regulated by regulating the opening degree of the plurality of regulating valves 14 and cooperating with the rotation speed of the compressor 11. In some embodiments, after the system of the water chiller 1 of the present application is started, a temperature target may be preset manually, and then the rotation speed of the compressor 11 and the opening degrees of the plurality of regulating valves 14 are adjusted by the unit controller, so that the temperature of the environment where the system is located reaches and finally stabilizes at the target temperature.
The water chiller 1 system of the present application also includes a UPS uninterruptible power supply (not shown) electrically connected to the unit controller for powering the unit controller when the unit 1 is powered off. In some embodiments, a UPS is electrically connected to the plurality of regulator valves 14, the UPS also powering the plurality of regulator valves 14 when the unit 1 is powered down. In this way, the unit controller and the plurality of regulating valves 14 can continue to operate after the unit 1 is powered down. In some embodiments, the unit controller further includes a power failure detection circuit, and when the unit is powered off, the power failure detection circuit records a power failure time period t because the UPS uninterruptible power supply continues to supply power to the unit controller. In other embodiments, for some regulator valves 14 that require power to maintain the opening, the ups may continuously power these regulator valves 14 such that the regulator valves 14 are maintained at the opening prior to the power outage. Typically, a UPS uninterruptible power supply can continue to supply power for about ten minutes.
Fig. 2 is a flowchart of a unit power-off starting method, which is applied to a unit controller and includes steps S1-S3.
In step S1, the operation state of the compressor 11 is detected. In some embodiments, the operating conditions include whether the compressor 11 is electric, the rotational speed of the compressor 11, and the like. The unit controller continuously detects the operation state of the compressor 11 during the operation of the unit 1, and if the unit 1 is detected to be powered off during the operation of the unit, the step S2 is entered.
In some embodiments, it may be detected whether the unit 1 is powered down, which is specifically implemented as follows: the unit controller detects the voltage of the inlet end of the unit 1, and if the voltage of the inlet end of the unit 1 is zero, the unit 1 is in a power-off state. By detecting the voltage of the inlet end of the unit 1, whether the unit 1 has electricity or not can be conveniently and accurately judged, so that whether the compressor 11 has electricity or not can be determined.
In step S2, when the unit 1 is powered off, the operating state of the compressor 11 at the time of power off is recorded. The unit controller records the operating state of the compressor 11 when the unit is powered off. In this case, the unit controller records the operating state of the compressor 11 at the time of the power failure quickly when the power is off, since the unit 1 continuously detects the state thereof when the power is on. The UPS uninterrupted power supply can also continue to supply power to the unit controller, and when the unit 1 is powered off, the running state of the unit 1 at the time of power off can be stored in the unit controller until the electric quantity of the UPS uninterrupted power supply is exhausted. In some embodiments, the UPS may also include power generation equipment in order to extend the record of the operational status of the unit 1 at the time of the unit controller's power outage.
In some embodiments, the power-down detection circuit may monitor whether the unit is powered up in the power-off state, record the power-off duration t, and enter step S3 after recovering the power. In step S3, when the unit 1 is powered on, the opening degrees of the plurality of regulating valves 14 are controlled to be consistent with the opening degrees when the power is off, and the compressor 11 is controlled to be started according to the set starting strategy according to the power-off time t of the unit 1, so that the operation state of the compressor 11 is restored when the power is off. In some embodiments, the plurality of regulator valves 14 in the assembly 1 are unchanged in opening after power failure due to the nature of the regulator valves 14 and the continuous power of the regulator valves 14 by the UPS uninterruptible power supply. At the time of power-up, the opening degrees of the plurality of regulator valves 14 are controlled to maintain the opening degrees at the time of power-off. In other embodiments, the opening of the regulator valve 14 may be recorded when the power is off, and the regulator valve 14 may be controlled according to the recorded opening when the power is on. In some embodiments, at least two different power-off durations control the compressor 11 to start according to different start-up strategies. When the power-off time period is in different ranges, the compressor 11 can be started according to different starting strategies. The starting strategy may be different for longer power-off periods and shorter power-off periods. A plurality of start-up strategies may be set, the start-up strategy is selected according to the power-off time period, and the start-up of the compressor 11 is controlled according to the selected start-up strategy.
Therefore, the machine set power-off starting method can record the running state of the compressor 11 when the machine set 1 is powered off, control the opening degrees of the regulating valves 14 to be consistent with the opening degrees when the machine set 1 is powered on, and control the compressor 11 to be started according to the set starting strategy according to the length of the power-off time length, so that the compressor 11 is enabled to recover the running state of the machine set when the machine set is powered off, the running state before the operator is repeatedly manually set can be avoided, the running state when the machine set is automatically started to be powered off can be achieved, the machine set power-off starting method is intelligent, different starting strategies can be adopted when the power-off time length is different, and the machine set power-off starting method is intelligent, so that user experience is improved.
FIG. 3 is a specific flowchart of step S3 in the embodiment shown in FIG. 2; the starting strategy in step S3 includes a quick start strategy and a normal start strategy, and the duration of starting the compressor 11 using the quick start strategy is shorter than the duration of starting the compressor 11 using the normal start strategy. In the illustrated embodiment, according to the power-off time period t of the unit 1 in step S3, controlling the compressor 11 to start according to the set starting strategy may include: if the power-off time period t is within the first power-off time period range (t 1, t 2), the compressor 11 is controlled to be started quickly according to a quick start strategy, and if the power-off time period t exceeds the upper limit value t2 of the first power-off time period range (t 1, t 2), the compressor 11 is controlled to be started normally according to a normal start strategy.
Since the compressor 11 is not stopped immediately after the power is off, if the unit 1 can be powered on again within a short period of time (t 1 period), the unit 1 can maintain normal operation. In some embodiments, t1 has a value in the range of 0.5S-2S, and in the illustrated embodiment is a centrifugal magnetic levitation centrifuge, t1 has a value of 2S. In some embodiments, if the power-off duration t is smaller than the lower limit value t1 of the first power-off duration range (t 1, t 2) during power-on, the operation of the compressor 11 is continuously controlled according to the control strategy of the compressor 11 during power-off.
In some embodiments, when the power-off time is longer than t1 and less than or equal to t2, it may be approximately considered that the unit 1 has a power failure accident in the operation process, after power-on, the user needs the unit 1 the same as before power-off, the unit controller may be continuously powered by the power-off time, the opening degree of the regulating valve 14 is not changed, so as to enable the compressor 11 to recover the operation state of the unit when power-off, and the unit controller may directly use the operation state of the compressor 11 recorded after power-off for controlling the compressor 11 after power-on, and use the quick start parameter to control the unit 1. In other embodiments, when the power-off time is longer than t2, it may be considered that the user turns off the power by himself, and then powers on again to control the start of the compressor 11 according to the normal start parameters.
In some embodiments, to achieve a duration of time when starting the compressor 11 with a quick start strategy is less than a duration of time when starting the compressor 11 with a normal start strategy, the compressor 11 mainly includes hardware level and control level adjustments at start-up.
In the hardware level, in some embodiments, if the power-off duration t is smaller than the upper limit value t2 of the first power-off duration range (t 1, t 2), the power-off duration is shorter, and therefore the power-off duration is always kept in normal operation before power-off, and the initializing and self-checking processes of the structure of the unit 1, such as IGV (inlet guide vane valve) initializing and bearing self-checking, can be omitted.
In the control layer, in some embodiments, when the quick start strategy is used for starting, since the opening degrees of the plurality of regulating valves 14 are not changed, after the compressor 11 is in the running state when the power is restored, the refrigerating capacity before the power is turned off, so that the power-off starting method of the unit 1 can omit the step of calculating and adjusting the opening degrees of the regulating valves 14, and shortens the duration of restoring the refrigerating capacity of the unit 1 before the power is turned off.
In some embodiments, also at the control level, to shorten the start-up duration of the compressor 11, a quick start parameter may be set to change the control parameter at start-up, for example, to shorten the capacity control soft-load time, shorten the demand constraint soft-load time, or to take a quick start parameter that is more aggressive than the normal start-up parameter, for example, to change one or more of these control parameters such as modulation ratio gain, modulation integration time, control classification time, current limitation ratio coefficient, current limitation integration time constant, start-up capacity of the compressor 11, etc., so that the compressor 11 can resume the running state at power-off faster.
In some embodiments, the compressor 11 is a magnetic levitation compressor 11, and after the compressor 11 is powered down, the compressor 11 experiences three phases, namely the rotor remains levitated, the rotor gradually stops from a hovering state but the compressor 11 remains in communication with the crew controller, the rotor stops, and the compressor 11 is disconnected from communication with the crew controller.
In order to prevent the occurrence of a fault that the unit controller cannot receive the communication with the compressor 11, the first power-off duration range (t 1, t 2) may be subdivided into a first sub-range (t 1, t 3) and a second sub-range (t 3, t 2).
The first power-off duration range (t 1, t 2) is greater than the duration that the compressor 11 is in a suspended state, less than or equal to the duration that the compressor 11 is in a suspended state from the time of power-off to the time that the UPS uninterruptible power supply is depleted, t1 is equal to the duration that the UPS uninterruptible power supply is depleted, t2 is less than or equal to the duration that the UPS uninterruptible power supply is depleted, the first sub-range (t 1, t 3) is less than or equal to the duration that the compressor 11 is in a suspended state from the suspended state to the time that the compressor 11 is in a suspended state, less than or equal to the duration that the compressor 11 is in a suspended state from the suspended state to the time that the UPS uninterruptible power supply is fully suspended, t3, t2 is greater than or equal to the duration that the compressor 11 is in a suspended state from the suspended state to the time that the UPS uninterruptible power supply is depleted, for example, the illustrated compressor 11 can remain suspended within the power-off 10S of the machine set 1, and the UPS uninterruptible power supply can remain powered for 10 minutes, the first power-off 10 minutes can be powered-off 10 minutes (2S).
From the above, in the illustrated embodiment, when the power-off of the unit 1 occurs, the bearings of the compressor 11 are still in a suspended state in 2S, and the compressor 11 can still operate in a state before the power-off.
In the illustrated embodiment, when the power-off time of the unit 1 is within the first sub-range (2 s,10 s), and the power backup of the compressor 11 is completed at this time, the bearings of the compressor 11 are gradually suspended to a stop state, but the compressor 11 still has electricity, after the power supply is restored, the compressor 11 is not required to be initialized, and the unit controller controls the compressor 11 to start with a quick start strategy.
In the illustrated embodiment, when the power-off time of the unit 1 is within the second sub-range (10 s,10 min), and the compressor 11 is completely powered off at this time, after the unit 1 is powered on, the unit controller needs to wait for the initialization of the compressor 11, otherwise, the unit controller triggers an alarm, and can delay for a set period of time, and then start to establish communication.
The power-off starting method of the unit 1 can quickly restart the unit 1 according to the power-off time length t of the unit 1, especially for short-time power supply switching, without manual operation, and restore to the running state when power is off, so that the unit 1 can quickly reach the working state before power off and shorten the starting time, and in some embodiments, when the real-time working parameters of the unit 1 reach the running state when power is off, the quick starting stage is ended and the unit enters the normal running state.
In some embodiments, the method for starting the power-off of the unit 1 further includes step S4: the fault signal is cleared before controlling the compressor 11 to start according to a set start strategy.
Referring to fig. 1, in some embodiments, the compressors 11 include at least a first compressor 11 and a second compressor 11, and the power-off starting method of the unit 1 further includes: after the first compressor 11 is quickly started, if the rotation speed of the first compressor 11 reaches a rotation speed threshold value or the starting time of the first compressor 11 reaches a time threshold value or the ambient temperature where the compressor 11 is located reaches a temperature threshold value, the second compressor 11 is controlled to be quickly started. In some embodiments, to enable the current ambient temperature to quickly reach the demand, the starting conditions of the second compressor 11, such as lowering the rotational speed threshold, shortening the time threshold, etc., are also adaptively adjusted. Therefore, the power-off starting method of the unit 1 can be applied to the unit 1 comprising a plurality of compressors 11, the application range is wide, and the environment temperature of the unit 1 can be quickly recovered to the power-off state.
The method for starting the power-off of the water chilling unit 1 can be realized, and when the system of the water chilling unit 1 is powered off accidentally, the refrigerating capacity before power off can be quickly reached after power on is recovered.
The embodiment of the application also provides a unit controller 200, which is applied to a water chilling unit 1 system. FIG. 4 discloses a schematic block diagram of a crew controller 200 according to one embodiment of the present application. As shown in fig. 4, the crew controller 200 may include one or more processors 201 for implementing the crew blackout quick start method described in any of the embodiments above. In some embodiments, the crew controller 200 may include a computer readable storage medium 202, and the computer readable storage medium 202 may store programs that may be called by the processor 201, and may include a non-volatile storage medium. In some embodiments, crew controller 200 may include memory 203 and interface 204. In some embodiments, the crew controller 200 of the embodiments of the present application may also include other hardware according to the actual application.
The unit controller 200 of the embodiment of the present application has similar beneficial technical effects as the above-described method for quick start of unit power outage, and thus will not be described herein.
Embodiments of the present application also provide a computer-readable storage medium. The computer readable storage medium stores a program which, when executed by a processor, implements the method for quickly starting a power outage of a unit according to any one of the above embodiments.
Embodiments of the present application may take the form of a computer program product embodied on one or more storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having program code embodied therein. Computer-readable storage media include both non-transitory and non-transitory, removable and non-removable media, and information storage may be implemented by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer readable storage media include, but are not limited to: new types of memory, such as phase change memory/resistive random access memory/magnetic memory/ferroelectric memory (PRAM/RRAM/MRAM/FeRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, may be used to store information that may be accessed by the computing device.
The method and the system for quickly starting the power failure of the unit and the computer readable storage medium provided by the embodiment of the application are described in detail. Specific examples are used herein to illustrate the method for quickly starting a power outage of a unit, the system thereof and the computer readable storage medium according to the embodiments of the present application, and the description of the above embodiments is only for helping to understand the core ideas of the present application, and is not intended to limit the present application. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made herein without departing from the spirit and principles of the invention, which should also fall within the scope of the appended claims.
Claims (7)
1. The utility model provides a unit outage starting method, its characterized in that, the unit includes compressor, evaporimeter, condenser, UPS uninterrupted power source, unit controller and a plurality of governing valve, the compressor with the evaporimeter passes through the pipeline and links to each other, a plurality of governing valves locate different positions on the pipeline, the compressor with the condenser is connected, the condenser with the evaporimeter links to each other, UPS uninterrupted power source with unit controller electricity is connected, is used for supplying power to the unit controller when the unit outage, unit outage starting method is applied to the unit controller, includes:
detecting the running state of the unit;
when the unit is powered off, recording the running state of the compressor when the unit is powered off; and
When the unit is electrified, controlling the opening degrees of the regulating valves to be consistent with the opening degrees in the outage state, and controlling the compressor to start according to a set starting strategy according to the outage duration of the unit so as to recover the running state of the unit in the outage state;
the starting strategy comprises a quick starting strategy and a normal starting strategy, and the time length when the compressor is started by the quick starting strategy is shorter than the time length when the compressor is started by the normal starting strategy;
if the power-off time length is within a first power-off time length range, controlling the compressor to be started quickly according to the quick starting strategy;
if the power-off duration exceeds the upper limit value of the first power-off duration range, controlling the compressor to be started normally according to the normal starting strategy;
the first power-off duration range is divided into a first sub-range and a second sub-range; the unit power-off starting method further comprises the following steps: when the unit is electrified, if the power-off time length is in the second sub-range, communication is established with a compressor controller after time delay setting time length, and after the communication is established, the compressor is controlled to be started quickly according to the quick start strategy according to the power-off operation state of the compressor;
the compressor comprises a magnetic suspension compressor, and the upper limit value of the first sub-range is less than or equal to the duration from a hovering state to a complete stopping state of the compressor;
the lower limit value of the second sub-range is larger than the duration from the hovering state to the complete stopping state of the compressor, and the upper limit value of the second sub-range is smaller than or equal to the duration from the power-off time to the power exhaustion of the UPS;
the lower limit value of the first power-off duration range is larger than the duration of the compressor in a suspension state, and the upper limit value of the first power-off duration range is smaller than or equal to the duration from the power-off time to the power exhaustion of the UPS.
2. The unit power-down starting method according to claim 1, further comprising: and when the unit is electrified, if the power-off time length is within the first sub-range, the unit is in communication connection with the compressor controller, and the compressor is controlled to be started quickly according to the quick start strategy.
3. The unit power-off starting method according to claim 1, wherein the unit power-off starting method comprises:
and when the unit is electrified, if the power-off duration is smaller than the lower limit value of the first power-off duration range, continuously controlling the compressor to work according to a compressor control strategy when the power is off.
4. The unit power-down starting method according to claim 1, wherein the compressors include at least a first compressor and a second compressor, the unit power-down starting method further comprising:
after the first compressor is started quickly, if the rotating speed of the first compressor reaches a rotating speed threshold value or the starting time of the first compressor reaches a time threshold value or the ambient temperature of the first compressor reaches a temperature threshold value, controlling the second compressor to be started quickly.
5. A unit controller comprising one or more processors configured to implement the unit power down initiation method of any one of claims 1-4.
6. A computer readable storage medium, having stored thereon a program which, when executed by a processor, implements the unit power outage start method according to any one of claims 1-4.
7. A chiller system, comprising: the utility model provides a compressor, evaporimeter, condenser, UPS uninterrupted power source, a plurality of governing valve and the unit controller of claim 5, the compressor with the evaporimeter passes through the pipeline and links to each other, different positions on the pipeline are located to a plurality of governing valves, the compressor with the condenser is connected, the condenser with the evaporimeter links to each other, UPS uninterrupted power source with the unit controller a plurality of governing valve are connected, are used for when the unit outage for the unit controller power supply.
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| JP2010203745A (en) * | 2009-03-06 | 2010-09-16 | Hitachi Appliances Inc | Air conditioner |
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| CN112762527A (en) * | 2020-12-31 | 2021-05-07 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and power-off control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH109687A (en) * | 1996-06-25 | 1998-01-16 | Hitachi Ltd | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010203745A (en) * | 2009-03-06 | 2010-09-16 | Hitachi Appliances Inc | Air conditioner |
| CN105371414A (en) * | 2014-08-06 | 2016-03-02 | 广东美的制冷设备有限公司 | An air conditioner control method and an air conditioner controller |
| CN104833022A (en) * | 2015-04-29 | 2015-08-12 | 麦克维尔空调制冷(武汉)有限公司 | Method for controlling low cooling water inlet temperature starting of air conditioning unit |
| CN106594994A (en) * | 2016-12-22 | 2017-04-26 | 重庆美的通用制冷设备有限公司 | Method and system for automatic and quick start for power-off of unit as well as air conditioner |
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