CN108317681A - Control method of variable frequency air conditioner and variable frequency air conditioner - Google Patents
Control method of variable frequency air conditioner and variable frequency air conditioner Download PDFInfo
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- CN108317681A CN108317681A CN201810001413.XA CN201810001413A CN108317681A CN 108317681 A CN108317681 A CN 108317681A CN 201810001413 A CN201810001413 A CN 201810001413A CN 108317681 A CN108317681 A CN 108317681A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims abstract description 83
- 238000004378 air conditioning Methods 0.000 claims description 67
- 230000002950 deficient Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
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Abstract
The invention provides a control method of a variable frequency air conditioner and the variable frequency air conditioner, wherein the air conditioner comprises a starting stage and an operating stage, and the control method comprises the following steps: and in the operation stage, acquiring the current exhaust parameter of the compressor, comparing the current frequency of the compressor with a preset frequency, and judging whether to control the air conditioner to enter a refrigerant-deficient protection state or not according to the current exhaust parameter when the current frequency of the compressor is lower than or equal to the preset frequency. According to the control method of the variable frequency air conditioner and the air conditioner, whether the variable frequency air conditioner is in the refrigerant shortage protection state can be detected more accurately, the problem of refrigerant shortage error protection of the variable frequency air conditioner in the low-frequency operation mode is effectively avoided, and the stability and the reliability of the operation of the air conditioner are greatly improved.
Description
Technical field
The present invention relates to field of air conditioning, and in particular to a kind of scarce refrigerant protection control method and frequency conversion sky of convertible frequency air-conditioner
It adjusts.
Background technology
Existing scarce refrigerant protection control method is to be by detecting the temperature difference between refrigerant outer tube and refrigerant inner tube
The differentiation of no scarce refrigerant, although this control method is simple directly, judging nicety rate is low, is very easy to erroneous judgement occur
Situation.When user opens battery saving mode, operation of air conditioner to default low frequency dwell point is hereinafter, even if the refrigerant in air-conditioning is let out
The case where leaking, scarce refrigerant can not be also detected using above-mentioned control method.In addition, when air-conditioning is run under worst hot case, air-conditioning
The refrigerating capacity of itself is relatively low, and the temperature difference between refrigerant outer tube and refrigerant inner tube is smaller, it is easy to scarce refrigerant be caused accidentally to protect and lead
It causes air-conditioning to shut down, bad experience is brought to user.
Invention content
In view of this, one of the objects of the present invention is to provide one kind, to lacking refrigerant, accidentally protection judges more accurate frequency conversion
The control method and convertible frequency air-conditioner of air-conditioning.
In order to achieve the above objectives, in a first aspect, the present invention uses following technical scheme：
A kind of control method of convertible frequency air-conditioner, the air-conditioning include startup stage and operation phase, the control method packet
It includes：
In the operation phase, the current exhaust parameter and current frequency of the compressor are obtained, by the current of the compressor
Frequency is compared with predeterminated frequency, when the current frequency of the compressor is less than or equal to predeterminated frequency, is worked as according to described
Front exhaust parameter judges whether that controlling the air-conditioning enters scarce refrigerant guard mode.
Preferably, the current exhaust parameter includes current exhaust gas temperature, is judged whether according to the current exhaust gas temperature
The air-conditioning, which is controlled, into refrigerant guard mode is lacked includes：
In startup stage, the initial exhaust gas temperature of the compressor of the air-conditioning when starting of air conditioner is obtained, is worked as by described in
Front exhaust temperature is compared with the initial exhaust gas temperature, and judges whether that controlling the air-conditioning entrance lacks according to comparison result
Refrigerant guard mode；And/or
The current exhaust parameter includes current exhaust pressure, is judged whether described in control according to the current exhaust pressure
Air-conditioning enters scarce refrigerant guard mode：
The current exhaust pressure is compared with preset pressure, and is judged whether according to comparison result to control the sky
It transfers in into scarce refrigerant guard mode.
Preferably, when the current frequency of the compressor is less than or equal to the predeterminated frequency, if meeting following condition
At least one of, then it controls the air-conditioning and enters scarce refrigerant guard mode：
Condition A：The difference of the current exhaust gas temperature and the initial exhaust gas temperature is more than preset value；
Condition B：The current exhaust pressure is less than preset pressure.
Preferably, ranging from 35 DEG C to 45 DEG C of the preset value, and/or,
Ranging from 1 megapascal of the preset pressure is to 2 megapascal.
Preferably, the predeterminated frequency is working frequency of the air-conditioning in low frequency dwell point.
Preferably, when the current frequency of the compressor is higher than the predeterminated frequency, it is cold into lacking to control the air-conditioning
Matchmaker's guard mode.
Preferably, the control method includes：
In startup stage, the initial temperature parameter when starting of air conditioner is obtained；
In the operation phase, the Current Temperatures parameter of the air-conditioning is obtained；
Before being compared the current frequency of the compressor with predeterminated frequency, judge that the Current Temperatures parameter is
It is no to meet scarce refrigerant protection Rule of judgment, and carry out the current frequency and institute when meeting the scarce refrigerant and protecting Rule of judgment
State the comparison of predeterminated frequency.
Preferably, the initial temperature parameter includes the initial inner tube temperature and/or outdoor refrigerant pipeline of indoor refrigerant pipeline
Initial outer tube temperature；And/or
The Current Temperatures parameter includes the current interior tube temperature of indoor refrigerant pipeline, the current outer tube temperature of outdoor refrigerant pipeline
And/or current indoor environment temperature.
Preferably, the scarce refrigerant protection Rule of judgment includes：
Condition one, the difference of the initial interior tube temperature and the current interior tube temperature are less than or equal to the first preset temperature value；
And/or
Condition two, the difference of the current indoor environment temperature and current interior tube temperature are less than or equal to the second preset temperature
Value；And/or
Condition three, the difference of the current outer tube temperature and the initial outer tube temperature are less than or equal to third preset temperature value.
Preferably, ranging from 1 DEG C to 3 DEG C of first preset temperature value, and/or,
Ranging from 1 DEG C to 3 DEG C of second preset temperature value；And/or
Ranging from 1 DEG C to 3 DEG C of the third preset temperature value.
Preferably, the operation phase is entered after startup stage, the first scheduled duration of the operation of air conditioner, into institute
Judge whether the Current Temperatures parameter meets scarce refrigerant protection Rule of judgment while stating the operation phase.
Preferably, it when the air-conditioning enters scarce refrigerant guard mode, controls the air-conditioning and shuts down weight after the second preset duration
It is new to start.
Preferably, the air-conditioning in third preset duration machine stop times be greater than or equal to preset times when,
Control air-conditioning is not restarted after shutting down；And/or
It is shown on the display panel of the air-conditioning and lacks refrigerant label.
In order to achieve the above object, second aspect, the present invention uses following technical scheme：
A kind of convertible frequency air-conditioner is controlled using the control method of convertible frequency air-conditioner as described above.
Whether the control method and convertible frequency air-conditioner of convertible frequency air-conditioner in the application more accurately can detect convertible frequency air-conditioner
In scarce refrigerant guard mode, effectively avoid the problem that scarce refrigerant erroneous judgement, pole occurs under low frequency operational mode in convertible frequency air-conditioner
The earth improves the stability and reliability of operation of air conditioner.
Description of the drawings
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the flow chart of the control method of convertible frequency air-conditioner in the application.
Specific implementation mode
Below based on embodiment, present invention is described, it should be understood by one skilled in the art that provided herein
Attached drawing is provided to the purpose of explanation, and attached drawing is not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being containing for " including but not limited to "
Justice.
This application provides a kind of control method of convertible frequency air-conditioner and convertible frequency air-conditioners, using the convertible frequency air-conditioner in the application
Control method controls convertible frequency air-conditioner, can obtain preferably scarce refrigerant protection detection result, avoid because occurring lacking refrigerant
The case where accidentally protecting causes bad experience to user, improves the operational reliability and accuracy of air-conditioning.Change in the application
Frequency air-conditioning indoors refrigerant pipeline, be provided with temperature-detecting device, such as temperature sensing package on outdoor refrigerant pipeline, it is corresponding to obtain
The temperature of refrigerant pipeline.Additionally, it is preferred that temperature-detecting device, such as temperature sensor are provided on machine indoors, to obtain room
Temperature in interior environment.Convertible frequency air-conditioner includes frequency-changeable compressor and control device, the frequency-changeable compressor and the control device
It is connected, the control device can obtain the delivery temperature and working frequency of the frequency-changeable compressor.The control device with
The temperature-detecting device is connected, to obtain the temperature value of each position.In addition, being additionally provided on the frequency-changeable compressor
Pressure-detecting device, the pressure-detecting device are connected with the control device.
The control process of convertible frequency air-conditioner in the application includes startup stage and operation phase, startup stage, that is, convertible frequency air-conditioner
Start-up course, it is generally the case that convertible frequency air-conditioner startup stage predetermined hold-time (has specific introduction) below, and the operation phase is
Convertible frequency air-conditioner completes the operational process after starting and obtains the current exhaust parameter of the compressor in the operation phase, by the pressure
The current frequency of contracting machine is compared with predeterminated frequency, when the current frequency of the compressor is less than or equal to predeterminated frequency,
Judge whether that controlling the air-conditioning enters scarce refrigerant guard mode according to the current exhaust parameter.It is current when the compressor
When frequency is more than predeterminated frequency, controls the air-conditioning and enter scarce refrigerant guard mode.Preferably, the predeterminated frequency is the sky
Adjust the working frequency in low frequency dwell point, the ranging from 1Hz to 36Hz of the predeterminated frequency, it is further preferred that the default frequency
Rate is 30Hz.Wherein, the current exhaust parameter includes current exhaust gas temperature and current exhaust pressure, when the current exhaust of selection
When parameter difference, corresponding different control method.
In a preferred embodiment, when the current exhaust parameter of acquisition is current exhaust gas temperature, according to institute
It states current exhaust gas temperature and judges whether that controlling the air-conditioning enters scarce refrigerant guard mode, including：
In startup stage, the initial exhaust gas temperature of the compressor of the air-conditioning when starting of air conditioner is obtained, it will be described first
Beginning delivery temperature is compared with the current exhaust gas temperature, and judges whether that controlling the air-conditioning entrance lacks according to comparison result
Refrigerant guard mode.Specifically, when the initial exhaust gas temperature being compared with the current exhaust gas temperature, if described current
Delivery temperature and the difference of the initial exhaust gas temperature are more than preset value, control the air-conditioning and enter scarce refrigerant guard mode.It is excellent
Selection of land, ranging from 35 DEG C to 45 DEG C of the preset value, it is further preferred that the preset value is 40 DEG C.
Further or in another preferred embodiment, the current exhaust parameter includes current exhaust pressure,
Judge whether that control the air-conditioning includes into the method for lacking refrigerant guard mode according to the current exhaust pressure：
The current exhaust pressure is compared with preset pressure, and is judged whether according to comparison result to control the sky
It transfers in into scarce refrigerant guard mode.Specifically, the current exhaust pressure is compared with preset pressure, the current exhaust
When pressure is less than preset pressure, controls the air-conditioning and enter scarce refrigerant guard mode.Preferably, the preset pressure is ranging from
1 megapascal to 2 megapascal, it is further preferred that the preset pressure is 1.5 megapascal.It is, of course, understood that different air-conditionings
The parameter value of preset pressure can be different.
In a more preferred embodiment, the current exhaust parameter includes current exhaust pressure and current exhaust temperature
Degree, when the current frequency of the compressor is less than or equal to the predeterminated frequency, if meeting at least one of following condition,
It then controls the air-conditioning and enters scarce refrigerant guard mode：
Condition A：The difference of the current exhaust gas temperature and the initial exhaust gas temperature is more than preset temperature；
Condition B：The current exhaust pressure is less than preset pressure.
In the preset pressure and the preferred scope of the preset temperature and above-mentioned two preferred embodiment
Range is similar, repeats no more again.In the present embodiment, while current exhaust pressure and current exhaust gas temperature, Neng Goubao being detected
It is more accurate to demonstrate,prove entire deterministic process, further avoids scarce refrigerant accidentally protection situation occur, body is preferably used to user
It tests.
In order to further strengthen control method control logic tightness, ensure control method precise control and can
By property, the control method in the application includes：
In startup stage, the initial temperature parameter when starting of air conditioner is obtained；
In the operation phase, the Current Temperatures parameter of the air-conditioning is obtained；
Before being compared the current frequency of the compressor with predeterminated frequency, judge that the Current Temperatures parameter is
It is no to meet scarce refrigerant protection Rule of judgment, and carry out the current frequency and institute when meeting the scarce refrigerant and protecting Rule of judgment
State the comparison of predeterminated frequency.Enter the operation phase after startup stage, the first scheduled duration of the operation of air conditioner, sentences simultaneously
Whether the Current Temperatures parameter of breaking meets scarce refrigerant protection Rule of judgment.Preferably, first scheduled duration is ranging from
200 seconds to 400 seconds, it is further preferred that first scheduled duration is 300 seconds, i.e., 5 minutes.That is, the air-conditioning starting up is simultaneously
After five minutes, the control device, which proceeds by, judges whether the Current Temperatures parameter of air-conditioning meets scarce refrigerant protection and judge for operation
Condition.
Further, the initial temperature parameter includes the initial inner tube temperature and/or outdoor refrigerant pipe of indoor refrigerant pipeline
The initial outer tube temperature on road；The Current Temperatures parameter includes that the current interior tube temperature of indoor refrigerant pipeline, outdoor refrigerant pipeline are worked as
Preceding outer tube temperature and/or current indoor environment temperature.
Further, the scarce refrigerant protection Rule of judgment includes：
Condition one, the difference of the initial interior tube temperature and the current interior tube temperature are less than or equal to the first preset temperature value；
And/or
Condition two, the difference of the current indoor environment temperature and current interior tube temperature are less than or equal to the second preset temperature
Value；And/or
Condition three, the difference of the current outer tube temperature and the initial outer tube temperature are less than or equal to third preset temperature value.Its
In, it is ranging from 1 DEG C to 3 DEG C of first preset temperature value, ranging from 1 DEG C to 3 DEG C of second preset temperature value, described
Ranging from 1 DEG C to 3 DEG C of third preset temperature value.It is further preferred that first preset temperature value, the second preset temperature value,
Third preset temperature value is all equal, and numerical value is 2 DEG C.
In above-mentioned control method, no matter in which rate-determining steps, when the air-conditioning enters scarce refrigerant guard mode, control
The air-conditioning restarts after shutting down the second preset duration.Preferably, ranging from 2 minutes to 4 points of second preset duration
Clock, it is further preferred that second preset duration is 3 minutes.In addition, if the air-conditioning is shut down time in third preset duration
When number is greater than or equal to preset times, control air-conditioning is not restarted after shutting down, meanwhile, it is shown on the display panel of the air-conditioning
Refrigerant label is lacked, refrigerant state is lacked to remind user's air-conditioning to be in, air-conditioning should be repaired as early as possible and add fluorine.Preferably,
Ranging from 40 minutes to 80 minutes of the third preset duration, the preset times are 3 times to 5 times, it is further preferred that described
Third preset duration is 1 hour, and the preset times are 3 times.
As shown in Figure 1, being illustrated to the control method in the application below by a specific control flow.
S00, refrigerating state booting.
S01, judge whether the operation duration of compressor reaches 5 minutes.
If so, S02 is executed, if it is not, then continuing to judge.
S02, judge whether following three conditions meet simultaneously：
Condition one, the difference of the initial interior tube temperature and the current interior tube temperature are less than or equal to 2 DEG C；
Condition two, the difference of the current indoor environment temperature and current interior tube temperature are less than or equal to 2 DEG C；
Condition three, the difference of the current outer tube temperature and the initial outer tube temperature are less than or equal to 2 DEG C.
If so, executing S03.If it is not, then executing S06, illustrate to be unsatisfactory for lacking refrigerant protection judgement during operation of air conditioner
Condition, air-conditioning, which is not present, lacks refrigerant situation, and air-conditioning is run according to parameter set by user.
S03, judge whether the current frequency of the compressor is more than the working frequency of low frequency dwell point.
If so, executing S05, the air-conditioning, which enters, lacks for example scarce fluorine guard mode of refrigerant；If it is not, then executing S04.
S04, judge whether the current exhaust gas temperature is more than 40 DEG C with the difference for just knowing delivery temperature.
If so, executing S05, control air-conditioning, which enters, lacks refrigerant guard mode, if it is not, then executing S06, air-conditioning is according to user
The parameter of setting is run.
S05, control air-conditioning, which enter, lacks refrigerant guard mode.
S06, air-conditioning are run according to parameter set by user.
The control method and air-conditioning of convertible frequency air-conditioner in the application can more accurately detect whether convertible frequency air-conditioner is in
Refrigerant guard mode is lacked, effectively avoids the problem that convertible frequency air-conditioner occurs scarce refrigerant under low frequency operational mode and accidentally protects, greatly
Ground improves the stability and reliability of operation of air conditioner.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each preferred embodiment can be free
Ground combination, superposition.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For, the present invention can have various modifications and changes.It is all within spirit and principles of the present invention made by any modification, equivalent
Replace, improve etc., it should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of control method of convertible frequency air-conditioner, which is characterized in that the air-conditioning includes startup stage and operation phase, the control
Method processed includes：
In the operation phase, the current exhaust parameter and current frequency of the compressor are obtained, by the current frequency of the compressor
It is compared with predeterminated frequency, when the current frequency of the compressor is less than or equal to predeterminated frequency, according to described when front row
Gas parameter judges whether that controlling the air-conditioning enters scarce refrigerant guard mode.
2. control method according to claim 1, which is characterized in that
The current exhaust parameter includes current exhaust gas temperature, is judged whether to control the air-conditioning according to the current exhaust gas temperature
Include into scarce refrigerant guard mode：In startup stage, the initial row of the compressor of the air-conditioning when starting of air conditioner is obtained
The current exhaust gas temperature is compared with the initial exhaust gas temperature, and judges whether to control according to comparison result by temperature degree
It makes the air-conditioning and enters scarce refrigerant guard mode；
And/or
The current exhaust parameter includes current exhaust pressure, is judged whether to control the air-conditioning according to the current exhaust pressure
Include into scarce refrigerant guard mode：The current exhaust pressure is compared with preset pressure, and is sentenced according to comparison result
It is disconnected whether to control the air-conditioning into scarce refrigerant guard mode.
3. control method according to claim 2, which is characterized in that when the current frequency of the compressor is less than or equal to
When the predeterminated frequency, if meeting at least one of following condition, controls the air-conditioning and enter scarce refrigerant guard mode：
Condition A：The difference of the current exhaust gas temperature and the initial exhaust gas temperature is more than preset value；
Condition B：The current exhaust pressure is less than preset pressure.
4. control method according to claim 3, which is characterized in that ranging from 35 DEG C to 45 DEG C of the preset value, and/
Or,
Ranging from 1 megapascal of the preset pressure is to 2 megapascal.
5. control method according to claim 1, which is characterized in that the predeterminated frequency is that the air-conditioning is stopped in low frequency
The working frequency of point.
6. control method according to claim 1, which is characterized in that when the current frequency of the compressor is higher than described pre-
If when frequency, controlling the air-conditioning and entering scarce refrigerant guard mode.
7. control method according to claim 1, which is characterized in that the control method includes：
In startup stage, the initial temperature parameter when starting of air conditioner is obtained；
In the operation phase, the Current Temperatures parameter of the air-conditioning is obtained；
Before being compared the current frequency of the compressor with predeterminated frequency, judge whether the Current Temperatures parameter is full
The scarce refrigerant of foot protects Rule of judgment, and carry out when meeting the scarce refrigerant and protecting Rule of judgment the current frequency with it is described pre-
If the comparison of frequency.
8. control method according to claim 7, which is characterized in that the initial temperature parameter includes indoor refrigerant pipeline
Initial inner tube temperature and/or outdoor refrigerant pipeline initial outer tube temperature；And/or
The Current Temperatures parameter include the current interior tube temperature of indoor refrigerant pipeline, outdoor refrigerant pipeline current outer tube it is mild/
Or current indoor environment temperature.
9. control method according to claim 8, which is characterized in that the scarce refrigerant protection Rule of judgment includes：
Condition one, the difference of the initial interior tube temperature and the current interior tube temperature are less than or equal to the first preset temperature value；With/
Or,
Condition two, the difference of the current indoor environment temperature and current interior tube temperature are less than or equal to the second preset temperature value；With/
Or,
Condition three, the difference of the current outer tube temperature and the initial outer tube temperature are less than or equal to third preset temperature value.
10. control method according to claim 9, which is characterized in that ranging from 1 DEG C of first preset temperature value is extremely
3 DEG C, and/or,
Ranging from 1 DEG C to 3 DEG C of second preset temperature value；And/or
Ranging from 1 DEG C to 3 DEG C of the third preset temperature value.
11. control method according to claim 7, which is characterized in that in startup stage, the operation of air conditioner first is predetermined
Enter the operation phase after duration, it is scarce to judge whether the Current Temperatures parameter meets while entering the operation phase
Refrigerant protects Rule of judgment.
12. the control method according to one of claim 1 to 11, which is characterized in that the air-conditioning, which enters, lacks refrigerant protection
When state, controls after the air-conditioning shuts down the second preset duration and restart.
13. control method according to claim 12, which is characterized in that the air-conditioning is shut down secondary in third preset duration
When number is greater than or equal to preset times,
Control air-conditioning is not restarted after shutting down；And/or
It is shown on the display panel of the air-conditioning and lacks refrigerant label.
14. a kind of convertible frequency air-conditioner, which is characterized in that using the controlling party of the convertible frequency air-conditioner as described in one of claim 1 to 13
Method is controlled.
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| CN201810001413.XA CN108317681A (en) | 2018-01-02 | 2018-01-02 | Control method of variable frequency air conditioner and variable frequency air conditioner |
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| CN109210687A (en) * | 2018-09-21 | 2019-01-15 | 宁波奥克斯电气股份有限公司 | A kind of control method of air-conditioning system |
| CN110410933A (en) * | 2019-06-24 | 2019-11-05 | 青岛海尔空调器有限总公司 | Air conditioner refrigerant leakage detection method |
| CN110645672A (en) * | 2019-10-14 | 2020-01-03 | 南京天加环境科技有限公司 | Refrigerant shortage protection method for variable frequency air conditioner |
| CN112833596A (en) * | 2021-01-21 | 2021-05-25 | 四川长虹空调有限公司 | Method for judging state of refrigerant of refrigerating system |
| CN113339944A (en) * | 2021-05-10 | 2021-09-03 | 广东Tcl智能暖通设备有限公司 | Air conditioning system blockage detection method and device, storage medium and air conditioning system |
| CN113701307A (en) * | 2021-09-13 | 2021-11-26 | 宁波奥克斯电气股份有限公司 | Refrigerant shortage protection control method for variable frequency air conditioner and air conditioner |
| CN114216210A (en) * | 2021-12-20 | 2022-03-22 | 珠海格力电器股份有限公司 | Method for judging blocking condition of refrigeration system and air conditioner |
| CN114234357A (en) * | 2021-12-24 | 2022-03-25 | 珠海格力电器股份有限公司 | Air conditioner self-adaptive operation and maintenance method, air conditioner and computer readable storage medium |
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