CN110260492A - Blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode - Google Patents
Blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode Download PDFInfo
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- CN110260492A CN110260492A CN201910458553.4A CN201910458553A CN110260492A CN 110260492 A CN110260492 A CN 110260492A CN 201910458553 A CN201910458553 A CN 201910458553A CN 110260492 A CN110260492 A CN 110260492A
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to refrigerating of convertible frequency air conditioner technical fields, and in particular to blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode include the following steps, step a, calculate refrigeration demand Q；Step b, logic control is carried out to blower and compressor according to refrigeration demand Q, compared with prior art, the application is by accurately calculating refrigeration demand Q, to which compressor frequency is periodically adjusted according to refrigeration demand Q periodic adjustment and rotation speed of fan according to refrigeration demand Q stage by stage, when refrigeration demand variation or lower refrigeration demand, air-conditioning temperature will not be fluctuated because of the instantaneous overshoot of system, reduce the frequent start-stop of compressor, blower can also adjust revolving speed according to actual needs, keep power save mode, unit allocation precision and service life can effectively improve.
Description
Technical field
The present invention relates to refrigerating of convertible frequency air conditioner technical fields, and in particular to a kind of blower under refrigerating of convertible frequency air conditioner mode and
Compressor control method.
Background technique
Existing frequency conversion air conditioner in machine room blower in cooling mode and compressor control mode are substantially divided to two kinds.First
Kind, compressor frequency is adjusted according to refrigeration demand Q, and rotation speed of fan remains unchanged.Its disadvantages are that: rotation speed of fan is constant,
In underload, since compressor frequency minimizes, air quantity is bigger than normal, and pressure of inspiration(Pi) increases, and pressure at expulsion reduces, and causes to compress
Than relatively low, suction superheat is bigger than normal, compressor overload operation, reduces compressor stability and reliability, while blower power consumption
Accounting rises, and rotation speed of fan is constant, and the motor feels hot can neutralize the cooling capacity that generation is evaporated under low frequency for itself, is unfavorable for energy conservation.The
Two kinds, compressor frequency and rotation speed of fan are adjusted in synchronism according to refrigeration demand Q.The disadvantage is that: rotation speed of fan and compressor frequency
Be adjusted in synchronism, in middle low heat loads, as thermic load reduces, compressor and blower within the very short control period simultaneously
Output is reduced, due to evaporator pressure and the hysteresis quality of temperature change, the cooling capacity variation that evaporator exports in the short time is little, wind
Amount quickly reduce, cause air conditioner air outlet temperature that can rapidly drop to normal setting value hereinafter, system can control compressor closing,
Room temperature does not actually reach setting value also at this time, and compressor can be again turned on, and repeats the above movement, high frequent is caused to open
Stop and temperature fluctuation is big.
Both the above refrigeration mode, when low heat loads or thermic load reduce, air-conditioning draught fan high-speed cruising under low heat loads
It will cause compressor overload and energy consumption be high, also high frequent start and stop can be caused to ask because of blower and compressor rotary speed mismatch
Topic.
Summary of the invention
It is an object of the invention to aiming at the shortcomings in the prior art, and the wind under a kind of refrigerating of convertible frequency air conditioner mode is provided
Machine and compressor control method are able to solve the high problem of energy consumption using the control method.
The purpose of the present invention is achieved through the following technical solutions: providing the blower and pressure under a kind of refrigerating of convertible frequency air conditioner mode
Contracting machine control method, includes the following steps, step a, setting shutdown demand W, setting starting demand P, sets maximum refrigeration demand
Qmax, setting minimum refrigeration demand Qmin and calculating refrigeration demand Q；
Step b carries out following logic control to blower and compressor respectively according to refrigeration demand Q:
I. when refrigeration demand Q < shuts down demand W, compressor is closed；
Ii. when shutting down demand W≤refrigeration demand Q < system starting demand P, compressor keeps current state and operation frequency
Rate is constant；
Iii. when system starts demand P≤refrigeration demand Q < 100%, compressor is opened, and compressor operating frequency is with refrigeration
Demand Q's increases or reduces and increases or decreases；
Iiii. when refrigeration demand Q >=100%, compressor keeps highest frequency operation；
When any compressor is opened, blower need to switch to blower maximum speed operation at least 2s, and after compressor start
Start timing, blower starting is held time after S1 operation, by following logic operation:
I. as refrigeration demand Q >=Qmax, blower improves revolving speed, and each demand calculating cycle with fan speed regulation step-length L
Interior rotation speed changeUntil the revolving speed of blower reaches maximum speed, wherein T1 is rotating speed of target, and T0 is to work as forward
Speed, M are fan speed regulation ratio；
Ii. as refrigeration demand Q≤Qmin, blower reduces revolving speed, and each demand calculating cycle with fan speed regulation step-length L
Interior rotation speed changeUntil the revolving speed of blower reaches minimum speed, wherein T1 is rotating speed of target, and T0 is to work as forward
Speed, M are fan speed regulation ratio；
Iii. when refrigeration demand Q is between Qmin and Qmax, revolving speed the increasing or reducing with refrigeration demand Q of blower
And increase or decrease, until revolving speed reaches rotating speed of target operation, and the rotation speed change in each demand calculating cycleWherein, T1 is rotating speed of target, and T0 is current rotating speed, and M is fan speed regulation ratio.
Wherein, in step a, return difference value T β, set temperature setting value are controlled by temperature sensor detected value Td, temperature
It is as follows to calculate refrigeration demand Q by Ts and temperature control precision Tc:
Wherein, in stepb, after compressor is opened, after keeping 2min operation with initiation culture fz, further according to refrigeration demand
Q adjusts frequency and compressor minimum runing time is not less than 6min.
Wherein, in stepb, blower starting holds time S1 as 5min.
Wherein, in stepb, each demand calculating cycle is 10s-20s.
Beneficial effects of the present invention: blower and compressor control method under the refrigerating of convertible frequency air conditioner mode of the application lead to
It crosses and accurately calculates refrigeration demand Q, so that compressor frequency is according to refrigeration demand Q periodic adjustment and rotation speed of fan according to refrigeration
Demand Q is periodically adjusted stage by stage, and when refrigeration demand variation or lower refrigeration demand, air-conditioning temperature will not be because of being
It unites instantaneous overshoot and fluctuated, reduces the frequent start-stop of compressor, blower can also adjust revolving speed according to actual needs, keep section
Energy state, unit allocation precision and service life can effectively improve.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings, but the embodiment in attached drawing is not constituted to any limit of the invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the structural schematic diagram of the blower and compressor under a kind of refrigerating of convertible frequency air conditioner mode of the invention.
Fig. 2 is the output frequency table of comparisons of refrigeration demand Q and compressor.
Fig. 3 is the rotating speed of target table of comparisons of refrigeration demand Q and blower.
Appended drawing reference: compressor 1, blower 2, temperature sensor 3, evaporator 4, controller 5, expansion valve 6.
Specific embodiment
The invention will be further described with the following Examples.
The specific embodiment of blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode of the invention, such as
It shown in Fig. 1, is illustrated by taking more conventional frequency-conversion air-conditioning system as an example, indoor set system includes the evaporation for being sequentially communicated setting
Device 4, compressor 1 and expansion valve 6, evaporator 4 are provided with blower 2, and the side of 2 outlet air of blower is provided with temperature sensor 3；It is indoor
Machine system further includes controller 5, and compressor 1, blower 2, temperature sensor 3, expansion valve 6 are electrically connected with controller 5 respectively, and by
Controller 5 controls.
Blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode of the present embodiment, step a, setting are shut down
Demand W, setting starting demand P, maximum refrigeration demand Qmax, setting minimum refrigeration demand Qmin are set and calculates refrigeration demand Q,
Specifically, it calculates refrigeration demand Q and needs 2 detected value Hd of temperature sensor, temperature control return difference value T β, set temperature setting value Ts
With temperature control precision Tc, it is as follows to calculate refrigeration demand Q:
Step b carries out logic control to compressor according to demand W, starting demand P, refrigeration demand Q is shut down, see Fig. 2,
Fig. 2 is the output frequency table of comparisons of refrigeration demand Q and compressor, is controlled as follows:
I. when refrigeration demand Q < shuts down demand W, compressor is closed.
Ii. when shutting down demand W≤refrigeration demand Q < system starting demand P, compressor keeps current state and operation frequency
Rate is constant.
It iii. is refrigeration demand Q and compressor see Fig. 2, Fig. 2 as system starting demand P≤refrigeration demand Q < 100%
The output frequency table of comparisons, compressor opens, and compressor operating frequency improves or drop with increasing or reducing for refrigeration demand Q
It is low.
Iiii. when refrigeration demand Q >=100%, compressor keeps highest frequency operation.
In the control of compressor, after compressor is opened, compressor is with its initiation culture fzAfter keeping 2min operation, then
Frequency is adjusted according to refrigeration demand Q and compressor minimum runing time is not less than 6min.Wherein, initiation culture fzPreferred value can
Think the 50% of compressor highest frequency.
It is the rotating speed of target comparative diagram of refrigeration demand Q and blower, in the present embodiment, the control to blower see Fig. 3, Fig. 3
Make as follows: before any compressor of multisystem is opened, blower need to switch to blower maximum speed and run at least 2s, and from compressor
Start timing after starting, blower starting is held time after S1 (preferred value 5min) operation, by following logic operation: setting is maximum
Refrigeration demand Qmax and minimum refrigeration demand Qmin.
I. as refrigeration demand Q >=Qmax, blower improves revolving speed with fan speed regulation step-length L, wherein speed regulation step-length L (speed regulation
Maximum speed/100 step-length L=are per second) it can arbitrarily set, and the rotation speed change in each demand calculating cycleUntil the revolving speed of blower reaches maximum speed, wherein T1 is rotating speed of target, and T0 is current rotating speed, and M is blower tune
Speed ratio, M=5-20.The rotating speed of target of blower and the relationship of refrigeration demand Q are as shown in Figure 3；The rotating speed of target of blower is needed with refrigeration
Q is asked to adjust in real time, for example, for example: rotating speed of target adjusts in real time with refrigeration demand.Such as: M=5, at this time rotation speed of fan be
2000, blower maximum speed is 6000, is 3000 by calculating the corresponding rotating speed of target of Q, adjusts the speed step-length L=6000/ at this time
It is 100 per second=60/ second, rotation speed change=(3000-2000)/5=200, then blower turns in this demand calculating cycle 10 seconds
Speed need to only reach 2200, it is contemplated that reach within the 4th second in calculating cycle, hereafter 6 seconds 2200 revolving speeds of holding, then recalculate refrigeration to need
Ask Q, linkage fan and compressor operation.
Ii. as refrigeration demand Q≤Qmin, (speed regulation maximum speed/100 step-length L=are every with fan speed regulation step-length L for blower
Second) reduce revolving speed, and the rotation speed change in each demand calculating cycleUntil the revolving speed of blower reaches minimum turn
Speed, wherein T1 is rotating speed of target, and T0 is current rotating speed, and M is fan speed regulation ratio, M=5-20.
Iii. when refrigeration demand Q is between Qmin and Qmax, revolving speed the increasing or reducing with refrigeration demand Q of blower
And increase or decrease, until revolving speed reaches rotating speed of target operation, and the rotation speed change in each demand calculating cycleWherein, T1 is rotating speed of target, and T0 is current rotating speed, and M is fan speed regulation ratio, M=5-20, such as: each demand
Calculating cycle value is 10s.
Assuming that: the temperature that temperature sensor detected value Hd is detected is 33, and return air temperature setting value Ts is set as 30, refrigeration
Temperature return difference value T β is 2, and temperature control precision Tc is 0.89, then refrigeration demand Q are as follows:By
In refrigeration demand Q > 100%, system enters refrigeration mode at this time, and each components are operated according to refrigeration mode.
Blower and compressor control method under the refrigerating of convertible frequency air conditioner mode of the present embodiment are needed by accurately calculating refrigeration
Q is sought, so that compressor frequency periodically presses step according to refrigeration demand Q according to refrigeration demand Q periodic adjustment and rotation speed of fan
Long to adjust, when refrigeration demand variation or lower refrigeration demand, air-conditioning temperature will not be neglected because of the instantaneous overshoot of system
It is high suddenly low, the frequent start-stop of compressor is reduced, blower can also adjust revolving speed according to actual needs, keep power save mode, unit control
Precision and service life processed can effectively improve.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (5)
1. blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode, which is characterized in that include the following steps, walk
Rapid a, setting shutdown demand W, setting starting demand P, maximum refrigeration demand Qmax, setting minimum refrigeration demand Qmin and meter are set
Calculate refrigeration demand Q；
Step b carries out following logic control to blower and compressor respectively according to refrigeration demand Q:
I. when refrigeration demand Q < shuts down demand W, compressor is closed；
Ii. when shutting down demand W≤refrigeration demand Q < system starting demand P, compressor keeps current state and running frequency is not
Become；
Iii. when system starts demand P≤refrigeration demand Q < 100%, compressor is opened, and compressor operating frequency is with refrigeration demand
Increasing or reducing for Q and increase or decrease；
Iiii. when refrigeration demand Q >=100%, compressor keeps highest frequency operation；
When any compressor is opened, blower need to switch to blower maximum speed operation at least 2s, and since after compressor start
Timing, blower starting is held time after S1 operation, by following logic operation:
I. as refrigeration demand Q >=Qmax, blower improves revolving speed with fan speed regulation step-length L, and in each demand calculating cycle
Rotation speed changeUntil the revolving speed of blower reaches maximum speed, wherein T1 is rotating speed of target, and T0 is current rotating speed, M
For fan speed regulation ratio；
Ii. as refrigeration demand Q≤Qmin, blower reduces revolving speed with fan speed regulation step-length L, and in each demand calculating cycle
Rotation speed changeUntil the revolving speed of blower reaches minimum speed, wherein T1 is rotating speed of target, and T0 is current rotating speed, M
For fan speed regulation ratio；
Iii. when refrigeration demand Q is between Qmin and Qmax, the revolving speed of blower is increased or reduced and is mentioned with refrigeration demand Q's
High or reduction, until revolving speed reaches rotating speed of target operation, and the rotation speed change in each demand calculating cycleIts
In, T1 is rotating speed of target, and T0 is current rotating speed, and M is fan speed regulation ratio.
2. blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode according to claim 1, feature
It is: in step a, return difference value T β, set temperature setting value Ts and temperature is controlled by temperature sensor detected value Td, temperature
Precision Tc is controlled, it is as follows to calculate refrigeration demand Q:
3. blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode according to claim 1, feature
It is: in stepb, after compressor is opened, after keeping 2min operation with initiation culture fz, adjusts frequency further according to refrigeration demand Q
Rate and compressor minimum runing time are not less than 6min.
4. blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode according to claim 1, feature
Be: in stepb, blower starting holds time S1 as 5min.
5. blower and compressor control method under a kind of refrigerating of convertible frequency air conditioner mode according to claim 4, feature
Be: in stepb, each demand calculating cycle is 10s-20s.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110779171A (en) * | 2019-10-31 | 2020-02-11 | 广东海悟科技有限公司 | Air source heat pump unit control method, electronic equipment and computer readable storage medium |
| CN112856748A (en) * | 2021-01-21 | 2021-05-28 | 深圳市英威腾网能技术有限公司 | Cold output control method and device, machine room air conditioner and storage medium |
| CN114264029A (en) * | 2021-11-19 | 2022-04-01 | 科华数据股份有限公司 | Method for controlling air conditioner, air conditioner and storage medium |
| CN115143611A (en) * | 2022-07-22 | 2022-10-04 | 广东欧科空调制冷有限公司 | Distribution control method and system for multi-connected air conditioner combined module system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110779171A (en) * | 2019-10-31 | 2020-02-11 | 广东海悟科技有限公司 | Air source heat pump unit control method, electronic equipment and computer readable storage medium |
| CN110779171B (en) * | 2019-10-31 | 2021-11-05 | 广东海悟科技有限公司 | Air source heat pump unit control method, electronic equipment and computer readable storage medium |
| CN112856748A (en) * | 2021-01-21 | 2021-05-28 | 深圳市英威腾网能技术有限公司 | Cold output control method and device, machine room air conditioner and storage medium |
| CN114264029A (en) * | 2021-11-19 | 2022-04-01 | 科华数据股份有限公司 | Method for controlling air conditioner, air conditioner and storage medium |
| CN115143611A (en) * | 2022-07-22 | 2022-10-04 | 广东欧科空调制冷有限公司 | Distribution control method and system for multi-connected air conditioner combined module system |
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