CN105299825B - The limit frequency guard method of air-conditioning - Google Patents
The limit frequency guard method of air-conditioning Download PDFInfo
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- CN105299825B CN105299825B CN201510378052.7A CN201510378052A CN105299825B CN 105299825 B CN105299825 B CN 105299825B CN 201510378052 A CN201510378052 A CN 201510378052A CN 105299825 B CN105299825 B CN 105299825B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
A kind of limit frequency guard method of air-conditioning disclosed by the invention, includes the following steps：S1：Booting and routinely FREQUENCY CONTROL scheme are run；S2：Detect the temperature Tf of frequency-variable module and environment temperature T4；S3：Judge the range residing for the temperature Tf of frequency-variable module, if the temperature Tf of the frequency-variable module is more than the first threshold, and less than or equal to the second threshold, then runs and continue in next step according to the nominal frequencies control program；S4：Compare the temperature Tf environment temperatures T4 of frequency-variable module and the size of third threshold value；If the temperature Tf environment temperatures T4 >=third threshold value and predetermined hold-time of frequency-variable module, routinely FREQUENCY CONTROL scheme is run；If the temperature Tf environment temperature T4 ＜ thirds threshold values and predetermined hold-time of frequency-variable module, it is switched to the protection scheme operation of limit frequency.The limit frequency guard method of air-conditioning according to embodiments of the present invention ensures that frequency-variable module is run under safe temperature, has better reliability and safety.
Description
Technical field
The present invention relates to household appliance technical field, in particular to a kind of limit frequency guard method of air-conditioning.
Background technology
In the relevant technologies, during operation of air conditioner, when temperature sensing package failure of frequency-variable module, can not detect the work temperature of frequency-variable module
Degree, if the system still routinely limit frequency scheme operation of multi-connected machine, the temperature that can cause frequency-variable module is excessively high, influences air-conditioning
Normal operation.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose a kind of limit frequency guard method of air-conditioning.
The limit frequency guard method of air-conditioning according to embodiments of the present invention, includes the following steps：S1：Booting and routinely frequency
Control program is run；S2：Detect the temperature Tf of frequency-variable module and environment temperature T4；S3：Judge residing for the temperature Tf of frequency-variable module
Range, if the temperature Tf of the frequency-variable module is more than the first threshold, and less than or equal to the second threshold, then press
It runs and continues in next step according to the nominal frequencies control program；S4：Compare the temperature Tf- environment temperatures T4 and of frequency-variable module
The size of three threshold values；If the temperature Tf- environment temperatures T4 >=third threshold value and predetermined hold-time of frequency-variable module, routinely
FREQUENCY CONTROL scheme is run；If the temperature Tf- environment temperature T4 ＜ thirds threshold values and predetermined hold-time of frequency-variable module, cut
Change to the protection scheme operation of limit frequency.
The limit frequency guard method of air-conditioning according to embodiments of the present invention, by whether detecting frequency-variable module temperature sensing package in mistake
Effect state makes system switch between nominal frequencies control program and limit frequency protection scheme, so as to ensure frequency-variable module in safety
At a temperature of run, improve complete machine reliability of operation and stability.
Preferably, step S3 is further included：If the temperature Tf of the frequency-variable module is less than or equal to first threshold, switch
To limit frequency protection scheme operation；If the temperature Tf of the frequency-variable module is more than second threshold, it is switched to limit frequency protection scheme
Operation.
Preferably, after by the limit frequency protection scheme operation predetermined time, the temperature Tf of frequency-variable module and environment temperature are detected again
Spend T4；Compare the temperature Tf- environment temperatures T4 of frequency-variable module and the size of the 4th threshold value；If the temperature Tf- rings of frequency-variable module
The 4th threshold values of border temperature T4 ＞ and predetermined hold-time are then switched to the operation of nominal frequencies control program；If frequency-variable module
The threshold value of temperature Tf- environment temperatures T4≤the 4th and predetermined hold-time then continue by limit frequency protection scheme operation.
Preferably, if the temperature Tf of frequency-variable module is less than or equal to first threshold, the display element of the air-conditioning is shown
Show that frequency-variable module temperature sensing package is disconnected or is not connected with.
Preferably, if the temperature Tf of frequency-variable module is more than second threshold, the display element of the air-conditioning shows frequency conversion
The short circuit of module temperature sensing package or damage.
Preferably, if the temperature Tf- environment temperature T4 ＜ thirds threshold values and predetermined hold-time of frequency-variable module, described
The display element of air-conditioning shows frequency-variable module temperature sensing package and frequency-variable module loose contact.
Preferably, when being run under limiting frequency protection scheme, the temperature of frequency-variable module is in the safe operation temperature of frequency-variable module
In the range of degree.
Preferably, limit frequency protection scheme includes the following steps：A1：Detect the temperature Tf of frequency-variable module；A2：Detect the sky
The operational mode of tune；If the operational mode of the air-conditioning be heating mode, obtain the air-conditioning interior machine wind turbine it is current
Gear and suction superheat；A3：The range residing for the temperature Tf of the frequency-variable module is judged, if the temperature of the frequency-variable module
Tf is greater than or equal to the 5th threshold value, and less than or equal to the 6th threshold value, then generates the instruction of machine wind turbine gear in increasing；A4：Sentence
Whether the interior machine wind turbine break in highest gear, if the current gear of interior machine wind turbine described at this time arrived it is most high-grade, into
One step judges whether the suction superheat is greater than or equal to the default degree of superheat；If the suction superheat is greater than or equal to institute
The default degree of superheat is stated, then generates the instruction for the gear for reducing the outer machine wind turbine；And if the suction superheat is less than institute
The default degree of superheat is stated, then the instruction of outer machine wind turbine downshift is forbidden in generation.
Preferably, step A3 is further included：If the temperature Tf of the frequency-variable module is less than or equal to the 7th threshold value, with certainly
The interior machine wind turbine and outer machine wind turbine are controlled by control mode；If the temperature Tf of the frequency-variable module is more than the 7th threshold value
And during less than five threshold value, then increase the regularization condition for adjusting the interior machine wind turbine and the outer machine wind turbine.
Preferably, the interior machine wind turbine regularization condition forbids interior machine wind turbine downshift command for generation, the outer machine wind turbine
Regularization condition forbids outer machine wind turbine upshift command for generation.
Preferably, step A3 is further included：If the temperature Tf of the frequency-variable module is more than the 6th threshold value, generates shutdown and refer to
It enables.
Preferably, the interior machine wind turbine and outer machine wind turbine is controlled to refer to interior machine wind turbine and outer machine wind turbine with free control mode
Rotating speed can arbitrarily lift.
Preferably, it further includes：A5：In step A2, if the operational mode of the air-conditioning is refrigeration mode, institute is obtained
State the current gear of the interior machine wind turbine of air-conditioning；A6：The range described in the temperature Tf of the frequency-variable module is judged, if the frequency conversion
The temperature Tf of module is greater than or equal to the 5th threshold value, and less than or equal to the 6th threshold value, then generating increases outer machine wind turbine gear
Instruction；A7：Whether the interior machine wind turbine is judged in highest gear, if the current gear of interior machine wind turbine described at this time has arrived most
Top grade then generates the instruction for the gear for reducing the interior machine wind turbine.
Preferably, step A6 is further included：If the temperature Tf of the frequency-variable module is less than or equal to the 7th threshold value, with certainly
The interior machine wind turbine and outer machine wind turbine are controlled by control mode；If the temperature Tf of the frequency-variable module is more than the 7th threshold value
And during less than five threshold value, then increase generation and forbid interior machine wind turbine upshift command and forbid outer machine wind turbine downshift command.
Preferably, step A6 is further included：If the temperature Tf of the frequency-variable module is more than the 6th threshold value, generates shutdown and refer to
It enables.
Description of the drawings
Fig. 1 is the schematic diagram of the limit frequency guard method of air-conditioning according to embodiments of the present invention.
Fig. 2 be air-conditioning according to embodiments of the present invention run in the case where limiting frequency protection scheme schematic diagram (air-conditioning be in heating
During pattern).
Fig. 3 be air-conditioning according to embodiments of the present invention run in the case where limiting frequency protection scheme schematic diagram (air-conditioning be in refrigeration
During pattern).
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The limit frequency guard method of the air-conditioning of the embodiment of the present invention is described referring to Fig. 1 to Fig. 3.
As shown in Figure 1, the limit frequency guard method of air-conditioning according to embodiments of the present invention, includes the following steps：
S1) booting and the routinely operation of FREQUENCY CONTROL scheme.After air-conditioning booting, system default is according to nominal frequencies controlling party
Case is run, and wherein nominal frequencies control program refers to that air-conditioning is run in the normal mode, when running under this scenario, not to interior machine
The rotating speed of wind turbine and outer machine wind turbine carries out forced adjustment.
S2 the temperature Tf of frequency-variable module and environment temperature T4) is detected.It is detected after a period of time by the automatically controlled mainboard of air-conditioning
Environment temperature around the temperature and air-conditioning of frequency-variable module.
S3) judge the range residing for the temperature Tf of frequency-variable module, if the temperature Tf of frequency-variable module is more than first threshold a,
And it less than or equal to second threshold b, then runs and continues in next step according to nominal frequencies control program.That is, work as frequency conversion
The temperature of module within this temperature range when, can determine whether frequency-variable module in an ON state, therefore can continue to compare frequency-variable module
Temperature with environment temperature further to judge whether frequency-variable module temperature sensing package normally connect.
S4) compare the size of the temperature Tf- environment temperatures T4 and third threshold value c of frequency-variable module.Specifically, in frequency-variable module
Temperature Tf be more than first threshold a, and less than or equal to second threshold b when, according to nominal frequencies control program run, Zhi Houjie
It closes environment temperature and further judges whether frequency-variable module temperature sensing package normally connects.
If the temperature Tf- environment temperatures T4 >=third threshold value c and predetermined hold-time of frequency-variable module, continue according to normal
Advise the operation of FREQUENCY CONTROL scheme.Final as a result, to judge that obtaining frequency-variable module temperature sensing package is in normal operating conditions, air-conditioning system can
It is run according to ordinary control mode.
If the temperature Tf- environment temperatures T4 ＜ third threshold value c and predetermined hold-time of frequency-variable module, it is switched to limit frequency
Protection scheme is run.
The limit frequency guard method of air-conditioning according to embodiments of the present invention, by detecting frequency-variable module own temperature and environment
Temperature judges that frequency-variable module temperature sensing package whether in failure state, makes system in nominal frequencies control program and limit frequency protection side
Switch between case, so as to ensure that frequency-variable module is run under safe temperature, improve complete machine reliability of operation and stability.
Step S3 is further included：If the temperature Tf of frequency-variable module is less than or equal to first threshold a, it is switched to limit frequency and protects
Scheme is run.Specifically, when the temperature of frequency-variable module is less than or equal to first threshold a, due to the frequency-variable module that detects
Temperature is less than the temperature of frequency-variable module normal work, therefore judges that frequency-variable module temperature sensing package is in improper connection status, also
To say, frequency-variable module be because frequency-variable module temperature sensing package fail normally connect just cause its fever less, and then own temperature compared with
It is low.In this way, since frequency-variable module temperature sensing package is in improper connection status, if continuing to transport according to nominal frequencies control program
The temperature information of frequency-variable module, can not be timely transmitted to the main control unit of complete machine, can not ensured at the temperature of frequency-variable module by row
In in safety value.Therefore, limit frequency protection scheme is switched in the scenario above, it is ensured that the temperature of frequency-variable module is being pacified always
In total head.
Step S3 is further included：If the temperature Tf of frequency-variable module is more than second threshold b, it is switched to limit frequency protection scheme fortune
Row；If the temperature Tf- environment temperatures T4 >=third threshold value c and predetermined hold-time of frequency-variable module, routinely FREQUENCY CONTROL
Scheme is run.In this case, the temperature of frequency-variable module is higher than normal value, judges that frequency-variable module is in improper connection shape at this time
State, being switched to operation under limit frequency protection scheme can make frequency-variable module be that moderate temperature is in safety value.
Further, the limit frequency guard method of air-conditioning, it is further comprising the steps of：By the limit frequency protection scheme operation predetermined time
Afterwards, the temperature Tf of frequency-variable module and environment temperature T4 is detected again；If the temperature Tf- environment temperature T4 ＞ the 4th of frequency-variable module
Threshold value d and predetermined hold-time are then switched to the operation of nominal frequencies control program；If the temperature Tf- environment temperature of frequency-variable module
The threshold value d of T4≤the 4th and predetermined hold-time are spent, then is continued by limit frequency protection scheme operation.
Wherein, if the temperature Tf of frequency-variable module is less than or equal to first threshold a, the display element of air-conditioning shows frequency conversion
Module temperature sensing package is disconnected or is not connected with.If the temperature Tf- environment temperatures T4 ＜ third threshold value c of frequency-variable module and continuing pre- timing
Between, then the display element of air-conditioning shows frequency-variable module temperature sensing package and frequency-variable module loose contact.Operator is according to above-mentioned display knot
Fruit can shut down and reconnect frequency-variable module temperature sensing package.
If the temperature Tf of frequency-variable module is more than second threshold b, the display element of air-conditioning shows frequency-variable module temperature sensing package
Short circuit or damage.Operator frequency-variable module temperature sensing package can be replaced according to this display result or circuit maintenance.
When the temperature of frequency-variable module is under above-mentioned three kinds of situations, operator can be to frequency conversion mould according to above-mentioned judging result
Block temperature sensing package carries out relevant operation to repair to be at normal operating conditions to frequency-variable module temperature sensing package.
It is run, and the temperature of frequency-variable module is made to be in frequency-variable module since air-conditioning system can switch under limit frequency protection scheme
Safe operating temperature range in.Therefore, in the case of not to frequency-variable module temperature-sensitive maintenance packet, normal use air-conditioning is remained to,
With better safety and convenience.
As shown in Fig. 2, during operation of air conditioner, if the temperature sensing package failure of frequency-variable module, runs in the case where limiting frequency protection scheme,
Wherein limit frequency protection scheme includes the following steps：
A1) the operational mode of the temperature Tf of detection frequency-variable module and air-conditioning.
A2 the operational mode of the air-conditioning) is detected, if the operational mode of air-conditioning is heating mode, obtains the interior of air-conditioning
The current gear and suction superheat of machine wind turbine.Wherein, suction superheat refers to the suction superheat at the compressor of air-conditioning.
A3 the range residing for the temperature Tf of the frequency-variable module) is judged, if the temperature Tf of frequency-variable module is greater than or equal to
5th threshold value e, and less than or equal to the 6th threshold value f, then generate the instruction of machine wind turbine gear in increasing.That is, when the 5th
During threshold value e≤Tf≤the 6th threshold value f, the temperature of frequency-variable module has surpassed safe temperature, if interior machine wind turbine do not arrive it is most high-grade,
Generation increase in machine gear instruction so that interior machine wind turbine increases by one grade on the basis of original gear, increase interior machine wind turbine
Thus rotating speed strengthens the heat dissipation of air-conditioning, reduce the energy loss of complete machine, and then is minimized the temperature of frequency-variable module.
A4 whether the interior machine wind turbine) is judged in highest gear, if the current gear of interior machine wind turbine has arrived most at this time
Top grade, then further judge whether suction superheat is greater than or equal to the default degree of superheat.That is, when the rotating speed of interior machine wind turbine
When cannot increase again, the energy consumption of complete machine can be reduced by reducing the rotating speed of outer machine wind turbine, and then reach further reduction frequency conversion
The purpose of module temperature.
If suction superheat is greater than or equal to the default degree of superheat, the instruction for the gear for reducing outer machine wind turbine is generated.
That is when suction superheat is greater than or equal to the default degree of superheat, the rotating speed of outer machine wind turbine can be reduced.
If suction superheat is less than the default degree of superheat, the instruction of outer machine wind turbine downshift is forbidden in generation.That is, such as
Fruit suction superheat is less than the default degree of superheat, then allows outer machine wind turbine upshift or gear constant.
In this way, during air-conditioning work when the temperature sensing package of frequency-variable module fails, system is run making by above-mentioned guard method
The rotating speed of machine wind turbine reduces the rotating speed of outer machine wind turbine to reduce the energy of air-conditioning to accelerate air-conditioning heat dissipation speed in accelerating under heat pattern
The temperature of frequency-variable module in air-conditioning, is thus reduced in safety value, improves the reliability and stabilization of system operation by amount loss
Property；It is moreover, it is contemplated that too low and influence the normal operation of air-conditioning heating cycle and ask to suction superheat is likely to occur under heating mode
Topic, is detected suction superheat, when it is more than the default degree of superheat, can implement to reduce outer machine rotation speed of fan operation, when it
During less than the default degree of superheat, outer machine rotation speed of fan is not allowed to reduce, to avoid suction superheat with the reduction of outer machine rotation speed of fan
And reduce, thus on the basis of air-conditioning normal operation is ensured, achieve the effect that protect frequency-variable module.
Further, step A3 is further included：If the temperature Tf of frequency-variable module is more than the 7th threshold value g and less than the 5th threshold value
During e, then increase the regularization condition of machine wind turbine and outer machine wind turbine in adjustment；If the temperature Tf of frequency-variable module is less than or equal to the 7th
Threshold value g, then with machine wind turbine and outer machine wind turbine in the control of free control mode.
Specifically, the regularization condition of interior machine wind turbine forbids interior machine wind turbine downshift command, the adjustment item of outer machine wind turbine for generation
Part forbids outer machine wind turbine upshift command for generation.That is, when the temperature of frequency-variable module is more than the 7th threshold value g and less than the 5th
During threshold value e, it is easy to although the temperature of frequency-variable module is in safety value beyond safety value.At this point, interior machine wind is forbidden in generation
Machine downshift command and forbid the outer machine wind turbine upshift command of outer machine wind turbine, only allow the gear of machine wind turbine or holding in system increase
Interior machine wind turbine gear is constant and only allows to reduce the rotating speed of outer machine wind turbine or keeps the rotating speed of outer machine wind turbine constant.Lead to as a result,
It crosses and regularization condition is applied to the rotational speed regulation of interior machine wind turbine and outer machine wind turbine, do not increased with the temperature for controlling frequency-variable module, and then
It is that temperature is maintained in safety value to make frequency-variable module.
Specifically, turn of interior machine wind turbine and outer machine wind turbine is referred to machine wind turbine in the control of free control mode and outer machine wind turbine
Speed can be lifted arbitrarily.That is, when the temperature of frequency-variable module is less than or equal to the 7th threshold value g, the temperature of frequency-variable module at this time
Degree is not only existed in the range of safety value, and the adjustment in short-term of interior machine wind turbine and outer machine rotation speed of fan will not make the temperature of frequency-variable module
Degree is beyond safety value.
In some embodiments, step A3 is further included：If the temperature Tf of frequency-variable module is more than the 6th threshold value f, generate
Halt instruction.That is, when the temperature of frequency-variable module is more than the 6th threshold value f, the temperature of frequency-variable module is excessively high, alreadys exceed
Scope is adjusted in system, therefore generates halt instruction, and control air conditioner is shut down.
Wherein, at predetermined time intervals, the temperature Tf of frequency-variable module and the operational mode of air-conditioning are detected and judges frequency-variable module
Temperature residing for range, and the range according to residing for it sends out command adapted thereto.
As shown in figure 3, it further includes：A5：In step A2, if the operational mode of air-conditioning is refrigeration mode, sky is obtained
The current gear for the interior machine wind turbine adjusted；A6：The range described in the temperature Tf of the frequency-variable module is judged, if the temperature of frequency-variable module
It spends Tf and is greater than or equal to the 5th threshold value e, and less than or equal to the 6th threshold value f, then generate the instruction for increasing outer machine wind turbine gear；Such as
The current gear of fruit interior machine wind turbine at this time has arrived most high-grade, then generates the instruction of the gear of machine wind turbine in reducing.That is, work as
When air-conditioning is run in cooling mode, if the temperature of frequency-variable module is greater than or equal to the 5th threshold value e and less than or equal to the 6
During threshold value f, the rotating speed of machine wind turbine in the rotating speed and/or reduction of outer machine wind turbine is improved with regard to that can accelerate the heat dissipation of air-conditioning, reduce air-conditioning
Energy consumption, and then reduce frequency-variable module temperature, be in safety value.
As a result, during air-conditioning work when the temperature sensing package of frequency-variable module fails, system is run making by above-mentioned guard method
Accelerate the rotating speed of outer machine wind turbine under chill formula to accelerate air-conditioning heat dissipation speed, the rotating speed of machine wind turbine is to reduce the energy of air-conditioning in reduction
The temperature of frequency-variable module in air-conditioning, is thus reduced in safety value, improves the reliability and stabilization of system operation by amount loss
Property；Moreover, it is preferential adjust in machine wind turbine rotating speed, enhance the radiating rate of condenser, preferably reduce the energy consumption of air-conditioning,
Achieve the effect that reduce in frequency-variable module temperature value safety value.
Further, step A6 is further included：If the temperature Tf of frequency-variable module is less than or equal to the 7th threshold value g, with certainly
By control mode control in machine wind turbine and outer machine wind turbine；If the temperature Tf of frequency-variable module is more than the 7th threshold value g and less than the 5
During threshold value e, then increase the regularization condition of machine wind turbine and outer machine wind turbine in adjustment.
Wherein, interior machine wind turbine regularization condition forbids interior machine wind turbine upshift command for generation, and the regularization condition of outer machine wind turbine is
Outer machine wind turbine downshift command is forbidden in generation.That is, when the temperature Tf of frequency-variable module is more than the 7th threshold value g and less than the 5th threshold
During value e, although the temperature of frequency-variable module is in safety value, interior machine rotation speed of fan rises or outer machine rotation speed of fan may decline
The temperature of frequency-variable module can be made to exceed safety value, therefore, send out the instruction that interior machine wind turbine is forbidden to upshift and outer machine is forbidden to downshift,
It is controlled in safety value so that frequency-variable module is temperature.
In some embodiments, step A6 is further included：If the temperature Tf of frequency-variable module is more than the 6th threshold value f, generate
Halt instruction.That is, when the temperature of frequency-variable module is more than the 6th threshold value f, the temperature of frequency-variable module is excessively high, alreadys exceed
Scope is adjusted in system, therefore generates halt instruction, and control air conditioner is shut down.
It is real in cooling mode or in a heating mode, after sending out upshift command, corresponding rotation speed of fan raising
One grade or multi gear, after sending out downshift command, corresponding rotation speed of fan reduces a gear or multi gear.Interior machine wind turbine refers to indoor unit
Wind turbine, outer machine wind turbine refer to the wind turbine of outdoor unit.Wherein, in cooling mode, interior machine wind turbine refers to the wind at evaporator
Machine, outer machine wind turbine refer to the wind turbine at condenser；In a heating mode, interior machine wind turbine refers to the extension set at condenser, outside
Machine wind turbine refers to the wind turbine at evaporator.
It is appreciated that the guard method of the frequency-variable module of air-conditioning in cooling mode and the frequency conversion of air-conditioning in a heating mode
Module is that guard method can be jointly applied on same air-conditioning, with by being adjusted to interior machine wind turbine and outer machine rotation speed of fan
Whole, monitoring realizes the cooling to frequency-variable module, and then ensures frequency-variable module temperature under the premise of frequency-variable module temperature sensing package fails
Always in safety value.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be based on orientation shown in the drawings or
Position relationship is for only for ease of the description present invention and simplifies description rather than instruction or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
It connects or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature right over second feature or oblique upper or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the different embodiments or examples described in this specification and the feature of different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (14)
1. the limit frequency guard method of a kind of air-conditioning, which is characterized in that include the following steps：
S1：Booting and routinely FREQUENCY CONTROL scheme are run；
S2：Detect the temperature Tf of frequency-variable module and environment temperature T4；
S3：Judge the range residing for the temperature Tf of frequency-variable module, if the temperature Tf of the frequency-variable module is more than first threshold, and
Less than or equal to second threshold, then run and continue in next step according to the nominal frequencies control program；
S4：Compare the temperature Tf- environment temperatures T4 of frequency-variable module and the size of third threshold value；
If the temperature Tf- environment temperatures T4 >=third threshold value and predetermined hold-time of frequency-variable module, routinely FREQUENCY CONTROL
Scheme is run；
If the temperature Tf- environment temperature T4 ＜ thirds threshold values and predetermined hold-time of frequency-variable module, it is switched to limit frequency and protects
Scheme is run；
Limit frequency protection scheme includes the following steps：
A1：Detect the temperature Tf of frequency-variable module；
A2：Detect the operational mode of the air-conditioning；If the operational mode of the air-conditioning is heating mode, the air-conditioning is obtained
Interior machine wind turbine current gear and suction superheat；
A3：The range residing for the temperature Tf of the frequency-variable module is judged, if the temperature Tf of the frequency-variable module is greater than or equal to
5th threshold value, and less than or equal to the 6th threshold value, then generate the instruction of machine wind turbine gear in increasing；
A4：Whether the interior machine wind turbine is judged in highest gear, if the current gear of interior machine wind turbine described at this time has arrived most
Top grade, then further judge whether the suction superheat is greater than or equal to the default degree of superheat；
If the suction superheat is greater than or equal to the default degree of superheat, the finger for the gear for reducing outer machine wind turbine is generated
It enables；And
If the suction superheat is less than the default degree of superheat, the instruction of outer machine wind turbine downshift is forbidden in generation.
2. the limit frequency guard method of air-conditioning according to claim 1, which is characterized in that step S3 is further included：
If the temperature Tf of the frequency-variable module is less than or equal to first threshold, it is switched to the protection scheme operation of limit frequency；
If the temperature Tf of the frequency-variable module is more than second threshold, it is switched to the protection scheme operation of limit frequency.
3. the limit frequency guard method of air-conditioning according to claim 1 or 2, which is characterized in that by limit frequency protection scheme operation
After predetermined time, the temperature Tf of frequency-variable module and environment temperature T4 is detected again；
Compare the temperature Tf- environment temperatures T4 of frequency-variable module and the size of the 4th threshold value；If the temperature Tf- environment of frequency-variable module
The 4th threshold values of temperature T4 ＞ and predetermined hold-time are then switched to the operation of nominal frequencies control program；
If the threshold value of the temperature Tf- environment temperatures T4 of frequency-variable module≤the 4th and predetermined hold-time, continue to protect by limit frequency
Scheme is run.
4. the limit frequency guard method of air-conditioning according to claim 2, which is characterized in that if the temperature Tf of frequency-variable module is small
In or equal to first threshold, then the display element of the air-conditioning shows that frequency-variable module temperature sensing package disconnects or not connected.
5. the limit frequency guard method of air-conditioning according to claim 2, which is characterized in that if the temperature Tf of frequency-variable module is big
In the display element display frequency-variable module temperature sensing package short circuit or damage of second threshold, the then air-conditioning.
6. the limit frequency guard method of air-conditioning according to claim 1, which is characterized in that if the temperature Tf- of frequency-variable module
Environment temperature T4 ＜ thirds threshold values and predetermined hold-time, then the display element display frequency-variable module temperature sensing package of the air-conditioning is with becoming
Frequency module loose contact.
7. the limit frequency guard method of air-conditioning according to claim 1, which is characterized in that run in the case where limiting frequency protection scheme
When, the temperature of frequency-variable module is in the safe operating temperature range of frequency-variable module.
8. the limit frequency guard method of air-conditioning according to claim 1, which is characterized in that step A3 is further included：
If the temperature Tf of the frequency-variable module is less than or equal to the 7th threshold value, the interior machine wind is controlled with free control mode
Machine and outer machine wind turbine；
If the temperature Tf of the frequency-variable module is more than the 7th threshold value and is less than five threshold value, increase adjustment institute
State the regularization condition of interior machine wind turbine and the outer machine wind turbine.
9. the limit frequency guard method of air-conditioning according to claim 8, which is characterized in that the interior machine wind turbine regularization condition is
Interior machine wind turbine downshift command is forbidden in generation, and the regularization condition of the outer machine wind turbine forbids outer machine wind turbine upshift command for generation.
10. the limit frequency guard method of air-conditioning according to claim 1, which is characterized in that step A3 is further included：
If the temperature Tf of the frequency-variable module is more than the 6th threshold value, halt instruction is generated.
11. the limit frequency guard method of air-conditioning according to claim 8, which is characterized in that institute is controlled with free control mode
It states interior machine wind turbine and outer machine wind turbine refers to that interior machine wind turbine and the rotating speed of outer machine wind turbine can be lifted arbitrarily.
12. the limit frequency guard method of air-conditioning according to claim 1, which is characterized in that further include：
A5：In step A2, if the operational mode of the air-conditioning is refrigeration mode, the interior machine wind turbine of the air-conditioning is obtained
Current gear；
A6：The range residing for the temperature Tf of the frequency-variable module is judged, if the temperature Tf of the frequency-variable module is greater than or equal to
5th threshold value, and less than or equal to the 6th threshold value, then generate the instruction for increasing outer machine wind turbine gear；
A7：Whether the interior machine wind turbine is judged in highest gear, if the current gear of interior machine wind turbine described at this time has arrived most
Top grade then generates the instruction for the gear for reducing the interior machine wind turbine.
13. the limit frequency guard method of air-conditioning according to claim 12, which is characterized in that step A6 is further included：
If the temperature Tf of the frequency-variable module is less than or equal to the 7th threshold value, the interior machine wind is controlled with free control mode
Machine and outer machine wind turbine；
If the temperature Tf of the frequency-variable module is more than the 7th threshold value and is less than five threshold value, increase generation and prohibit
Only interior machine wind turbine upshift command and forbid outer machine wind turbine downshift command.
14. the limit frequency guard method of air-conditioning according to claim 13, which is characterized in that step A6 is further included：If institute
The temperature Tf for stating frequency-variable module is more than the 6th threshold value, then generates halt instruction.
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| CN107355951B (en) * | 2017-07-26 | 2020-03-31 | 广东美的暖通设备有限公司 | Air conditioner refrigeration mode control method and device and air conditioner |
| CN107477932A (en) * | 2017-08-15 | 2017-12-15 | 广东美的暖通设备有限公司 | The temperature-sensitive bag Failure Control method and apparatus of air-conditioning system and its frequency-variable module |
| CN108692433B (en) * | 2018-07-17 | 2020-06-02 | 奥克斯空调股份有限公司 | Heating control method and device for variable frequency air conditioner and variable frequency air conditioner |
| CN110425711B (en) * | 2019-09-05 | 2021-12-21 | 宁波奥克斯电气股份有限公司 | Temperature control method and device of intelligent power module and air conditioner |
| CN111852926B (en) * | 2020-07-22 | 2022-04-08 | 新风光电子科技股份有限公司 | Energy-saving fan control system with temperature and humidity detection function and control method |
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