CN112460772A - Air conditioning unit multistage refrigeration method and device, computer equipment and storage medium - Google Patents
Air conditioning unit multistage refrigeration method and device, computer equipment and storage medium Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 83
- 238000005057 refrigeration Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims description 70
- 238000004590 computer program Methods 0.000 claims description 22
- 238000007664 blowing Methods 0.000 claims description 5
- 230000006870 function Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 8
- 230000003111 delayed effect Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/36—Other airport installations
- B64F1/362—Installations for supplying conditioned air to parked aircraft
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Combustion & Propulsion (AREA)
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- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to a multi-stage refrigeration method and device for an air conditioning unit, computer equipment and a storage medium, wherein the air conditioning unit is powered on to obtain the temperature of an air inlet, the fixed frequency unit and the frequency converter unit are asynchronously started according to the temperature of the air inlet, the preset first temperature, the preset second temperature and the preset third temperature, the fixed frequency unit is started preferentially to carry out quick refrigeration, and the frequency converter unit is started in a delayed mode to avoid overlarge temperature change of an air supply outlet caused by sudden increase of refrigerating capacity; in addition, when the frequency converter set is started, the working frequency of the frequency converter set is adjusted based on the difference between the temperature of the air supply outlet and the preset set temperature, the refrigerating capacity of the air conditioner set is adjusted again, the temperature of the air supply outlet is further optimized, the influence of sudden temperature change of the air supply outlet on the environment (surrounding equipment or people) is avoided, and the variation range of the air supply temperature is effectively reduced.
Description
Technical Field
The application relates to the technical field of refrigeration control, in particular to a multi-stage refrigeration method and device for an air conditioning unit, computer equipment and a storage medium.
Background
With the development of science and technology, the air conditioning unit is applied to more and more scenes at present, and brings convenience to people. In some specific scenes, the air conditioning unit is required to be capable of rapidly refrigerating in a short time, which puts higher requirements on the control of the air conditioning unit.
Taking an airplane ground air conditioning unit as an example, the airplane ground air conditioning unit is an air conditioning unit which is specially used for providing cold air for an airplane parked on the ground of a terrace. Because the aircraft has short parking time at the apron, the ground air conditioner of the aircraft must refrigerate fresh air at 35 ℃ to 2 ℃ in a short time and send the fresh air to the cabin of the aircraft. In order to realize large enthalpy difference air supply, a conventional aircraft ground air conditioning unit is generally designed into a multi-stage refrigeration system. In order to meet the requirement of rapid refrigeration, a conventional aircraft ground air conditioning unit usually starts a multi-stage refrigeration system at the same time when the aircraft ground air conditioning unit is started to achieve the maximum refrigeration capacity, and then stops a compressor to unload the aircraft ground air conditioning unit according to the air supply temperature.
Although the multi-stage refrigeration mode can realize quick refrigeration in a short time, the refrigeration capacity is adjusted by adopting a shutdown unloading method, so that the fluctuation of the air supply temperature is large, and the temperature fluctuation can influence the service life of precision instruments in an aircraft cabin and the comfort of passengers.
Disclosure of Invention
In view of the above, it is necessary to provide a multi-stage refrigeration method and apparatus for an air conditioning unit, a computer device, and a storage medium, which have small supply air temperature fluctuations, in order to solve the above-mentioned technical problems.
A multi-stage refrigeration method of an air conditioning unit comprises a fixed frequency unit and a variable frequency unit;
the multi-stage refrigeration method of the air conditioning unit comprises the following steps:
acquiring the temperature of an air inlet when the power is on and started;
according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, the fixed frequency unit and the frequency conversion unit are asynchronously started, and the fixed frequency unit is started before the frequency conversion unit;
when the frequency converter set is started, the temperature of the air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
In one embodiment, the fixed frequency unit comprises a first fixed frequency unit and a second fixed frequency unit, and the frequency converter unit comprises a first frequency converter unit and a second frequency converter unit;
according to air intake temperature, predetermine first temperature, predetermine the second temperature and predetermine the third temperature, asynchronous start fixed frequency unit and frequency conversion unit include:
if the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, starting the first frequency conversion unit, and delaying a preset first time to start the first frequency conversion unit;
if the temperature of the air inlet is not less than the preset second temperature and less than the preset third temperature, starting the first frequency conversion unit, delaying the preset second time to start the second frequency conversion unit, and delaying the preset second time to start the first frequency conversion unit;
if the temperature of the air inlet is not lower than a preset third temperature, starting the first fixed-frequency unit, delaying a preset first time to start the second fixed-frequency unit, and delaying a preset second time to start the first variable-frequency unit and the second variable-frequency unit;
wherein the preset first time is less than the preset second time.
In one embodiment, when the frequency converter set is started, acquiring the temperature of the air supply outlet, and adjusting the working frequency of the started frequency converter set according to the difference between the temperature of the air supply outlet and a preset set temperature to reduce the difference includes:
when the frequency conversion unit is started, acquiring the temperature of an air supply outlet;
acquiring a difference value between the temperature of the air supply outlet and a preset set temperature;
if the difference is larger than the preset difference upper limit value, the frequency of the frequency conversion unit is increased;
if the difference is not greater than the preset difference upper limit value and not less than the preset difference lower limit value, maintaining the working frequency of the frequency conversion unit;
and if the difference is smaller than the preset difference lower limit value, reducing the frequency of the frequency converter set.
In one embodiment, the acquiring the air inlet temperature at the power-on start includes:
and electrifying and starting according to preset initial operation parameters, and acquiring the temperature of the air inlet when electrifying and starting.
In one embodiment, the power-on starting is performed according to preset initial operating parameters, and the acquiring of the temperature of the air inlet during the power-on starting includes:
when a starting signal is monitored, starting up the machine, powering on the machine and starting a blowing function;
delaying a preset third time to start the condensing fan and configuring the electronic expansion valve to a preset initial step number;
and delaying the preset fourth time and collecting the temperature of the air inlet.
In one embodiment, the value range of the preset first time is 0-10 seconds; the value range of the preset second time is 10 seconds to 20 seconds.
The application provides a multi-stage refrigerating device of an air conditioning unit, wherein the air conditioning unit comprises a fixed frequency unit and a variable frequency unit;
the air conditioning unit multistage refrigerating plant includes:
the initial starting module is used for acquiring the temperature of the air inlet when the power-on starting is carried out;
the asynchronous starting module is used for asynchronously starting the fixed frequency unit and the frequency conversion unit according to the temperature of the air inlet, the preset first temperature, the preset second temperature and the preset third temperature, wherein the fixed frequency unit is started before the frequency conversion unit;
and the power frequency adjusting module is used for acquiring the temperature of the air supply outlet when the frequency converter set is started, and adjusting the working frequency of the started frequency converter set according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
In one embodiment, the fixed frequency unit comprises a first fixed frequency unit and a second fixed frequency unit, and the frequency converter unit comprises a first frequency converter unit and a second frequency converter unit;
the asynchronous starting module is also used for starting the first frequency conversion unit when the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, and delaying a preset first time to start the first frequency conversion unit; when the temperature of the air inlet is not lower than a preset second temperature and lower than a preset third temperature, starting the first fixed frequency unit and the second fixed frequency unit simultaneously, and delaying a preset second time to start the first variable frequency unit; when the temperature of the air inlet is not less than a preset third temperature, starting a first fixed frequency unit, delaying a preset first time to start a second fixed frequency unit, and delaying a preset second time to start a first frequency converter unit and a second frequency converter unit; wherein the preset first time is less than the preset second time.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring the temperature of an air inlet when the power is on and started;
according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, a fixed frequency unit in the air conditioning unit and a variable frequency unit in the air conditioning unit are asynchronously started, wherein the fixed frequency unit is started before the variable frequency unit;
when the frequency converter set is started, the temperature of the air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring the temperature of an air inlet when the power is on and started;
according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, a fixed frequency unit in the air conditioning unit and a variable frequency unit in the air conditioning unit are asynchronously started, wherein the fixed frequency unit is started before the variable frequency unit;
when the frequency converter set is started, the temperature of the air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
The air conditioning unit comprises a fixed frequency unit and a variable frequency unit, wherein the fixed frequency unit is high in starting speed and can be used for rapidly refrigerating, the variable frequency unit can dynamically adjust the refrigerating capacity by adjusting the working frequency, the controllable precision is high, the air conditioning unit is powered on and starts up to obtain the temperature of an air inlet in the specific instruction control process, the fixed frequency unit and the variable frequency unit are asynchronously started according to the temperature of the air inlet, the preset first temperature, the preset second temperature and the preset third temperature, the fixed frequency unit and the variable frequency unit are preferentially started for rapidly refrigerating, and the variable frequency unit is started in a delayed mode to avoid overlarge temperature change of the air outlet caused by sudden increase of the refrigerating capacity; in addition, when the frequency converter set is started, the working frequency of the frequency converter set is adjusted based on the difference between the temperature of the air supply outlet and the preset set temperature, the refrigerating capacity of the air conditioner set is adjusted again, the temperature of the air supply outlet is further optimized, the influence of sudden temperature change of the air supply outlet on the environment (surrounding equipment or people) is avoided, and the variation range of the air supply temperature is effectively reduced.
Drawings
FIG. 1 is a diagram of an application environment of a multi-stage refrigeration method of an air conditioning unit in one embodiment;
FIG. 2 is a schematic diagram of an air conditioning unit architecture;
FIG. 3 is a schematic flow chart of a multi-stage refrigeration method of an air conditioning unit in one embodiment;
FIG. 4 is a schematic flow chart of a multi-stage refrigeration method of an air conditioning unit in another embodiment;
FIG. 5 is a schematic flow chart of a multi-stage refrigeration method of an air conditioning unit in an application example;
FIG. 6 is a block diagram showing the construction of a multi-stage refrigerating apparatus of an air conditioning unit according to an embodiment;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The air conditioning unit multistage refrigeration method provided by the application can be applied to the application environment shown in fig. 1. The air conditioning unit 102 performs multi-stage refrigeration on a refrigeration object to quickly reduce the temperature in the refrigeration object, the air conditioning unit specifically comprises a fixed frequency unit and a variable frequency unit, and the air conditioning unit 102 acquires the temperature of an air inlet when the air conditioning unit is powered on and started; according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, a fixed frequency unit in the air conditioning unit and a variable frequency unit in the air conditioning unit are asynchronously started, wherein the fixed frequency unit is started before the variable frequency unit; when the frequency converter set is started, the temperature of the air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
The application provides a multi-stage refrigeration method of an air conditioning unit, which is explained by taking the method applied to the air conditioning unit in fig. 1 as an example, the air conditioning unit specifically comprises a fixed frequency unit and a variable frequency unit, wherein the fixed frequency unit can be immediately started to reach the maximum output power (maximum refrigeration capacity), the capacity output can be maximized in a short time, and the rapid cooling requirement can be met; the working frequency of the frequency conversion unit is adjustable, the corresponding output power can be dynamically adjusted, the temperature control precision is high, and the temperature difference of the air supply outlet can be optimized. The whole air conditioning unit is shown in fig. 2, and specifically includes a fixed-frequency unit including a first fixed-frequency unit 1 (illustrated by using a compressor due to limited space) and a second fixed-frequency unit 2; the frequency converter set comprises a first frequency converter set 3 and a second frequency converter set 4. Also illustrated in FIG. 2 is a primary evaporator 5; a secondary evaporator 6; a tertiary evaporator 7; a four-stage evaporator 8; a primary condenser 9; a secondary condenser 10; a tertiary condenser 11; a four-stage condenser 12; a first electronic expansion valve 13; a second electronic expansion valve 14; an electronic expansion valve III 15; electronic expansion valve four 16; a first bypass valve 17; a second bypass valve 18; a blower 19; an air filter 20; electrical heating 21; an electric cabinet 22; a first condensing fan 23; a second condensing fan 24; a third condensing fan 25; and a fourth condensing fan 26.
As shown in fig. 3, the multi-stage refrigeration method of the air conditioning unit of the present application includes:
s200: and acquiring the temperature of the air inlet when the power is on and started.
The power-on starting refers to starting the air conditioning unit after responding to user operation, the air conditioning unit has a starting initialization process, and when the air conditioning unit is just started, the air conditioning unit reads preset initial operation control parameters to complete the action of initialization starting, such as starting a blower, starting a condensing fan, and opening an electronic expansion valve to prepare for outputting cold air. The method comprises the steps that the temperature of an air inlet in the air conditioning unit is obtained at the moment when the air conditioning unit is just powered on and started, the temperature of the air inlet represents the temperature of the air conditioning unit under the current environment condition, the air conditioning unit is driven by electric energy to reduce the temperature of sucked air in a multi-stage refrigeration mode in the subsequent treatment, and the sucked air is conveyed to a refrigeration object (an airplane stopped on the ground) through an air supply outlet. The temperature of the air inlet can be acquired for multiple times in unit time (such as second or millisecond) when the power-on start is obtained, the average value of the acquired temperature values is calculated, and the average value is used as the temperature of the air inlet, so that the accuracy of data acquisition is improved. The temperature of the air inlet can be acquired through a temperature sensor arranged at the air inlet.
S400: according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, the fixed-frequency unit and the frequency conversion unit are started asynchronously, and the fixed-frequency unit is started before the frequency conversion unit.
The preset first temperature T1, the preset second temperature T2, and the preset third temperature T3 are preset threshold values, which may be obtained by calculating the cooling capacity of the compressor and the required cooling capacity (related to the volume of the space to be cooled, the ambient temperature, and the like) in the current scene, or may be directly introduced into the air conditioning unit by an operator after calculation or setting, and the air conditioning unit directly obtains the 3 temperature values during actual operation. Generally speaking, temperature values corresponding to a preset first temperature T1, a preset second temperature T2 and a preset third temperature T3 are sequentially increased, when the temperature of the air inlet is in different intervals enclosed by three threshold values of the preset first temperature T1, the preset second temperature T2 and the preset third temperature T3, different asynchronous starting modes are adopted to control the starting of a fixed frequency unit and an inverter unit in the air conditioning unit, and the fixed frequency unit is started before the inverter unit so as to meet the requirement of quick refrigeration. It can be understood that the higher the temperature of the air inlet is, the higher the refrigerating capacity required by the air conditioning unit is, and the more fixed frequency units and frequency conversion units need to be started correspondingly. Here, the asynchronous starting mode is adopted to avoid the sudden temperature drop of the air supply outlet caused by the simultaneous and complete starting of the units in the air conditioning unit, which causes the sudden temperature drop in the cooling object (such as in the cabin), and brings influence to the equipment and people in the surrounding environment, that is, the defect of the traditional multi-stage cooling control is overcome. The asynchronous starting is specifically that the designated frequency unit and the frequency converter unit have time difference in starting, the timing frequency unit is started preferentially, the frequency converter unit is started after delaying for a certain time, and the specific time delay time can be determined according to the needs of actual conditions or the setting of operators. It should be further explained that, when there are multiple fixed frequency units, the fixed frequency units may also adopt an asynchronous starting mode to further reduce the temperature variation range, and similarly, when there are multiple frequency converter units, the frequency converter units may also adopt an asynchronous starting mode, and the specific asynchronous mode and the delay time thereof support the user-defined setting of the operator.
S600: when the frequency converter set is started, the temperature of the air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
When the frequency converter unit starts, the frequency converter unit operates according to the preset initial working frequency, the temperature of the air supply opening is further optimized, excessive interference of the temperature of the air supply opening to the ambient temperature is avoided, the working frequency of the frequency converter unit is further controlled, the output power of the frequency converter unit is adjusted, and the unit can still keep constant air outlet temperature when the ambient temperature changes. The preset set temperature may be a temperature required by the cooling object, for example, 2 ℃ in the aircraft cabin in the above embodiment, and the difference between the temperature of the air supply opening and the temperature required by the cooling object is reduced by adjusting the operating frequency of the started frequency conversion unit. Specifically, when the frequency converter set is started, the temperature of the air supply opening is obtained, the difference value between the temperature of the air supply opening and a preset set temperature is obtained, the working frequency of the started frequency converter set is adjusted according to the difference value to reduce the difference value, the difference value refers to the temperature of the air supply opening-the preset set temperature, the difference value can be positive or negative, and the working frequency of the frequency converter set is adjusted to tend to 0. When the difference value is too large, the temperature of the air outlet is too high, and the refrigerating capacity of the air conditioning unit needs to be increased, so that the frequency of the frequency conversion unit is increased; when the difference is not large, the temperature of the air outlet is similar to the preset temperature, and the frequency of the frequency conversion unit is maintained; when the difference is too small (negative number), the temperature of the air outlet is too low, and the refrigerating capacity of the air conditioning unit needs to be reduced, so that the frequency of the frequency converter unit is reduced.
According to the multi-stage refrigeration method of the air conditioning unit, the air conditioning unit comprises the fixed frequency unit and the frequency converter unit, wherein the fixed frequency unit is high in starting speed and can perform rapid refrigeration, the frequency converter unit can perform dynamic adjustment on the refrigerating capacity by adjusting the working frequency, the controllable precision is high, in the specific instruction control process, the air conditioning unit is powered on and starts up to obtain the temperature of an air inlet, the fixed frequency unit and the frequency converter unit are asynchronously started according to the temperature of the air inlet, the preset first temperature, the preset second temperature and the preset third temperature, the fixed frequency unit and the frequency converter unit are started preferentially to perform rapid refrigeration, and the frequency converter unit is started in a delayed mode to avoid overlarge temperature change of the air supply outlet; in addition, when the frequency converter set is started, the working frequency of the frequency converter set is adjusted based on the difference between the temperature of the air supply outlet and the preset set temperature, the refrigerating capacity of the air conditioner set is adjusted again, the temperature of the air supply outlet is further optimized, the influence of sudden temperature change of the air supply outlet on the environment (surrounding equipment or people) is avoided, and the variation range of the air supply temperature is effectively reduced.
In one embodiment, the fixed frequency unit comprises a first fixed frequency unit and a second fixed frequency unit, and the frequency converter unit comprises a first frequency converter unit and a second frequency converter unit;
as shown in fig. 4, S400 includes:
s420: if the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, starting the first frequency conversion unit, and delaying a preset first time to start the first frequency conversion unit;
s440: if the temperature of the air inlet is not less than the preset second temperature and less than the preset third temperature, starting the first frequency conversion unit, delaying the preset second time to start the second frequency conversion unit, and delaying the preset second time to start the first frequency conversion unit;
s460: if the temperature of the air inlet is not less than the preset third temperature, starting the first fixed-frequency unit, delaying the preset first time to start the second fixed-frequency unit, delaying the preset second time to start the first frequency converter unit and the second frequency converter unit, wherein the preset first time is less than the preset second time.
The preset first time and the preset second time are preset values and can be set according to actual scene requirements, the preset first time is smaller than the preset second time, the value range of the preset first time is 0-10 seconds, and the value range of the preset second time is 10-20 seconds.
As shown in fig. 5, in practical application, if T1 is not less than Ti and less than T2, the first fixed frequency unit is started, and the first frequency unit is started after 10 seconds of delay; if the T2 is less than or equal to Ti and less than T3, the first fixed frequency unit is started, the second fixed frequency unit is started after 10 seconds of delay, and the first fixed frequency unit is started after 20 seconds of delay; if the Ti is larger than or equal to T3, the first fixed frequency unit is started, the second fixed frequency unit is started after the time delay of 10 seconds, and the first frequency converter unit and the second frequency converter unit are started after the time delay of 20 seconds.
In one embodiment, when the frequency converter set is started, acquiring the temperature of the air supply outlet, and adjusting the working frequency of the started frequency converter set according to the difference between the temperature of the air supply outlet and a preset set temperature to reduce the difference includes:
when the frequency conversion unit is started, acquiring the temperature of an air supply outlet; acquiring a difference value between the temperature of the air supply outlet and a preset set temperature; if the difference is larger than the preset difference upper limit value, the frequency of the frequency conversion unit is increased; if the difference is not greater than the preset difference upper limit value and not less than the preset difference lower limit value, maintaining the working frequency of the frequency conversion unit; and if the difference is smaller than the preset difference lower limit value, reducing the frequency of the frequency converter set.
After the starting condition is met, the fixed-frequency unit is directly started, the variable-frequency unit runs according to the initial frequency, and the fixed-frequency unit is directly started, so that the capacity output can be maximized in a short time, and the requirement for quick cooling can be met. Meanwhile, the frequency conversion unit is opened according To the initial frequency, and the working frequency is adjusted according To the temperature To of the air supply outlet. Specifically, as shown in fig. 5, the difference (air outlet temperature deviation) Δ T between the air outlet temperature and the preset set temperature is the air supply temperature To — the preset set temperature: when the delta T is larger than 1, the frequency conversion unit performs frequency increasing; when delta T is more than or equal to-1 and less than or equal to 1, the frequency conversion unit maintains the existing frequency; when the delta T is less than-1, the frequency converter set carries out frequency reduction.
In one embodiment, the acquiring the air inlet temperature at the power-on start includes: and electrifying and starting according to preset initial operation parameters, and acquiring the temperature of the air inlet when electrifying and starting.
The initial operation parameters are used for controlling the operation of the air conditioning unit at the initial time of power-on start. Specifically, as shown in fig. 5, the blower is immediately started when powered on, the condensing blower is started after 10 seconds, the electronic expansion valve is started to a preset initial step number, and the temperature of the air inlet of the air conditioner is acquired after 10 seconds. And (4) finishing the initialization control of the air conditioning unit, and preparing to start to convey cold air to a refrigerating object.
It should be understood that, although the steps in the flowcharts are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in each of the flowcharts described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
In one embodiment, the application further provides an air conditioning unit multistage refrigerating device which is applied to an air conditioning unit, wherein the air conditioning unit comprises a fixed frequency unit and a variable frequency unit; as shown in fig. 6, the air conditioning unit multistage cooling device includes:
the initial starting module 200 is used for acquiring the temperature of the air inlet during power-on starting;
the asynchronous starting module 400 is used for asynchronously starting the fixed-frequency unit and the frequency conversion unit according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, wherein the fixed-frequency unit is started before the frequency conversion unit;
and the power frequency adjusting module 600 is used for acquiring the temperature of the air supply outlet when the frequency converter set is started, and adjusting the working frequency of the started frequency converter set according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
The air conditioning unit multistage refrigerating device is applied to an air conditioning unit, the air conditioning unit comprises a fixed frequency unit and a frequency converter unit, the fixed frequency unit is high in starting speed and can be used for rapidly refrigerating, the frequency converter unit can dynamically adjust refrigerating capacity by adjusting working frequency, the controllable precision is high, in the specific instruction control process, the air conditioning unit is powered on and started to obtain the temperature of an air inlet, the fixed frequency unit and the frequency converter unit are asynchronously started according to the temperature of the air inlet, a preset first temperature, a preset second temperature and a preset third temperature, the fixed frequency unit and the frequency converter unit are preferentially started for rapidly refrigerating, and the frequency converter unit is started in a delayed mode to avoid overlarge temperature change of an air supply outlet caused by sudden increase of refrigerating capacity; in addition, when the frequency converter set is started, the working frequency of the frequency converter set is adjusted based on the difference between the temperature of the air supply outlet and the preset set temperature, the refrigerating capacity of the air conditioner set is adjusted again, the temperature of the air supply outlet is further optimized, the influence of sudden temperature change of the air supply outlet on the environment (surrounding equipment or people) is avoided, and the variation range of the air supply temperature is effectively reduced.
In one embodiment, the fixed frequency unit comprises a first fixed frequency unit and a second fixed frequency unit, and the frequency converter unit comprises a first frequency converter unit and a second frequency converter unit;
the asynchronous starting module 600 is further configured to start the first frequency conversion unit when the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, and delay a preset first time to start the first frequency conversion unit; when the temperature of the air inlet is not lower than a preset second temperature and lower than a preset third temperature, starting the first fixed frequency unit and the second fixed frequency unit simultaneously, and delaying a preset second time to start the first variable frequency unit; when the temperature of the air inlet is not less than a preset third temperature, starting a first fixed frequency unit, delaying a preset first time to start a second fixed frequency unit, and delaying a preset second time to start a first frequency converter unit and a second frequency converter unit; wherein the preset first time is less than the preset second time.
In one embodiment, the power frequency adjustment module 600 is further configured to obtain a temperature of the air supply outlet when the frequency converter set is started; acquiring a difference value between the temperature of the air supply outlet and a preset set temperature; if the difference is larger than the preset difference upper limit value, the frequency of the frequency conversion unit is increased; if the difference is not greater than the preset difference upper limit value and not less than the preset difference lower limit value, maintaining the working frequency of the frequency conversion unit; and if the difference is smaller than the preset difference lower limit value, reducing the frequency of the frequency converter set.
In one embodiment, the initial starting module 200 is further configured to perform power-on starting according to a preset initial operating parameter, and obtain the air inlet temperature during power-on starting.
In one embodiment, the initial starting module 200 is further configured to start up and power up and start a blowing function when a starting signal is detected; delaying a preset third time to start the condensing fan and configuring the electronic expansion valve to a preset initial step number; and delaying the preset fourth time and collecting the temperature of the air inlet.
In one embodiment, the value range of the preset first time is 0-10 seconds; the value range of the preset second time is 10 seconds to 20 seconds.
For specific limitations of the multi-stage refrigeration device of the air conditioning unit, reference may be made to the above limitations of the multi-stage refrigeration method of the air conditioning unit, and details are not repeated here. All or part of each module in the multistage refrigerating device of the air conditioning unit can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used for storing self-defined and preset data such as preset delay time, temperature and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize the multi-stage refrigeration method of the air conditioning unit.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring the temperature of an air inlet when the power is on and started;
according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, the fixed frequency unit and the frequency conversion unit are asynchronously started, and the fixed frequency unit is started before the frequency conversion unit;
when the frequency converter set is started, the temperature of the air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
if the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, starting the first frequency conversion unit, and delaying a preset first time to start the first frequency conversion unit; if the temperature of the air inlet is not less than the preset second temperature and less than the preset third temperature, starting the first frequency conversion unit, delaying the preset second time to start the second frequency conversion unit, and delaying the preset second time to start the first frequency conversion unit; if the temperature of the air inlet is not less than the preset third temperature, starting the first fixed-frequency unit, delaying the preset first time to start the second fixed-frequency unit, delaying the preset second time to start the first frequency converter unit and the second frequency converter unit, wherein the preset first time is less than the preset second time.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
when the frequency conversion unit is started, acquiring the temperature of an air supply outlet; acquiring a difference value between the temperature of the air supply outlet and a preset set temperature; if the difference is larger than the preset difference upper limit value, the frequency of the frequency conversion unit is increased; if the difference is not greater than the preset difference upper limit value and not less than the preset difference lower limit value, maintaining the working frequency of the frequency conversion unit; and if the difference is smaller than the preset difference lower limit value, reducing the frequency of the frequency converter set.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and electrifying and starting according to preset initial operation parameters, and acquiring the temperature of the air inlet when electrifying and starting.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
when a starting signal is monitored, starting up the machine, powering on the machine and starting a blowing function; delaying a preset third time to start the condensing fan and configuring the electronic expansion valve to a preset initial step number; and delaying the preset fourth time and collecting the temperature of the air inlet.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring the temperature of an air inlet when the power is on and started;
according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, the fixed frequency unit and the frequency conversion unit are asynchronously started, and the fixed frequency unit is started before the frequency conversion unit;
when the frequency converter set is started, the temperature of the air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
In one embodiment, the computer program when executed by the processor further performs the steps of:
if the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, starting the first frequency conversion unit, and delaying a preset first time to start the first frequency conversion unit; if the temperature of the air inlet is not less than the preset second temperature and less than the preset third temperature, starting the first frequency conversion unit, delaying the preset second time to start the second frequency conversion unit, and delaying the preset second time to start the first frequency conversion unit; if the temperature of the air inlet is not less than the preset third temperature, starting the first fixed-frequency unit, delaying the preset first time to start the second fixed-frequency unit, delaying the preset second time to start the first frequency converter unit and the second frequency converter unit, wherein the preset first time is less than the preset second time.
In one embodiment, the computer program when executed by the processor further performs the steps of:
when the frequency conversion unit is started, acquiring the temperature of an air supply outlet; acquiring a difference value between the temperature of the air supply outlet and a preset set temperature; if the difference is larger than the preset difference upper limit value, the frequency of the frequency conversion unit is increased; if the difference is not greater than the preset difference upper limit value and not less than the preset difference lower limit value, maintaining the working frequency of the frequency conversion unit; and if the difference is smaller than the preset difference lower limit value, reducing the frequency of the frequency converter set.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and electrifying and starting according to preset initial operation parameters, and acquiring the temperature of the air inlet when electrifying and starting.
In one embodiment, the computer program when executed by the processor further performs the steps of:
when a starting signal is monitored, starting up the machine, powering on the machine and starting a blowing function; delaying a preset third time to start the condensing fan and configuring the electronic expansion valve to a preset initial step number; and delaying the preset fourth time and collecting the temperature of the air inlet.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, the computer program can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The multistage refrigeration method of the air conditioning unit is characterized in that the air conditioning unit comprises a fixed frequency unit and a variable frequency unit;
the multi-stage refrigeration method of the air conditioning unit comprises the following steps:
acquiring the temperature of an air inlet when the power is on and started;
according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, the fixed frequency unit and the frequency conversion unit are asynchronously started, and the fixed frequency unit is started before the frequency conversion unit;
when the frequency converter set is started, the temperature of an air supply outlet is obtained, and the working frequency of the started frequency converter set is adjusted according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
2. The method of claim 1, wherein the fixed frequency unit comprises a first fixed frequency unit and a second fixed frequency unit, and the variable frequency unit comprises a first variable frequency unit and a second variable frequency unit;
according to air intake temperature, predetermine first temperature, predetermine the second temperature and predetermine the third temperature, the asynchronous start decide the frequency unit with the frequency conversion unit includes:
if the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, starting the first frequency conversion unit, and delaying a preset first time to start the first frequency conversion unit;
if the temperature of the air inlet is not less than a preset second temperature and less than a preset third temperature, starting the first frequency conversion unit, delaying the preset second time to start the second frequency conversion unit, and delaying the preset second time to start the first frequency conversion unit;
if the temperature of the air inlet is not lower than a preset third temperature, starting the first fixed frequency unit, delaying the preset first time to start the second fixed frequency unit, and delaying the preset second time to start the first frequency converter unit and the second frequency converter unit;
wherein the preset first time is less than the preset second time.
3. The method as claimed in claim 1, wherein the obtaining of the temperature of the air supply opening when the frequency converter set is started, and the adjusting of the operating frequency of the started frequency converter set according to the difference between the temperature of the air supply opening and a preset setting temperature to reduce the difference comprises:
when the frequency converter set is started, acquiring the temperature of an air supply outlet;
acquiring a difference value between the temperature of the air supply outlet and a preset set temperature;
if the difference is larger than a preset difference upper limit value, performing frequency boosting on the frequency conversion unit;
if the difference is not greater than the preset difference upper limit value and not less than the preset difference lower limit value, maintaining the working frequency of the frequency converter set;
and if the difference is smaller than the preset difference lower limit value, carrying out frequency reduction on the frequency converter set.
4. The method of claim 1, wherein the obtaining the inlet temperature at power-on start comprises:
and according to the preset initial operation parameter, carrying out power-on starting, and acquiring the temperature of the air inlet when the power-on starting is carried out.
5. The method of claim 4, wherein the power-on starting according to the preset initial operation parameter, and obtaining the temperature of the air inlet at the power-on starting comprises:
when a starting signal is monitored, starting up the machine, powering on the machine and starting a blowing function;
delaying a preset third time to start the condensing fan and configuring the electronic expansion valve to a preset initial step number;
and delaying the preset fourth time and collecting the temperature of the air inlet.
6. The method according to claim 1, wherein the preset first time is within a range of 0-10 seconds; the preset second time is within a range of 10 seconds to 20 seconds.
7. The multi-stage refrigerating device of the air conditioning unit is characterized in that the air conditioning unit comprises a fixed frequency unit and a variable frequency unit;
the air conditioning unit multistage refrigerating device comprises:
the initial starting module is used for acquiring the temperature of the air inlet when the power-on starting is carried out;
the asynchronous starting module is used for asynchronously starting the fixed frequency unit and the frequency converter unit according to the air inlet temperature, the preset first temperature, the preset second temperature and the preset third temperature, wherein the fixed frequency unit is started before the frequency converter unit;
and the power frequency adjusting module is used for acquiring the temperature of the air supply outlet when the frequency converter set is started, and adjusting the working frequency of the started frequency converter set according to the difference between the temperature of the air supply outlet and the preset set temperature so as to reduce the difference.
8. The apparatus of claim 7, wherein the fixed frequency unit comprises a first fixed frequency unit and a second fixed frequency unit, and the frequency converter unit comprises a first frequency converter unit and a second frequency converter unit;
the asynchronous starting module is further used for starting the first frequency conversion unit when the temperature of the air inlet is not less than a preset first temperature and less than a preset second temperature, and delaying a preset first time to start the first frequency conversion unit; when the temperature of the air inlet is not lower than a preset second temperature and lower than a preset third temperature, starting the first fixed frequency unit and the second fixed frequency unit simultaneously, and delaying the preset second time to start the first frequency converter unit; when the temperature of the air inlet is not less than a preset third temperature, starting the first fixed frequency unit, delaying the preset first time to start the second fixed frequency unit, and delaying the preset second time to start the first frequency converter unit and the second frequency converter unit; wherein the preset first time is less than the preset second time.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 6.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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