CN105066540A - Start control method and system for variable-frequency air conditioner and air conditioner - Google Patents
Start control method and system for variable-frequency air conditioner and air conditioner Download PDFInfo
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- CN105066540A CN105066540A CN201510427680.XA CN201510427680A CN105066540A CN 105066540 A CN105066540 A CN 105066540A CN 201510427680 A CN201510427680 A CN 201510427680A CN 105066540 A CN105066540 A CN 105066540A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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Abstract
The invention relates to a start control method and system for a variable-frequency air conditioner and the air conditioner. The start control method for the variable-frequency air conditioner comprises the following steps that a target frequency Fd, a first frequency Fa and a second frequency Fb are set; a variable-frequency compressor is controlled to operate at the frequency Fa till a pressure difference is established, and a four-way valve of the variable-frequency air conditioner reverses; the frequency of the variable-frequency compressor is controlled to drop to the frequency Fb from the frequency Fa, the variable-frequency compressor operates at the frequency Fb for the time T1, and pressure buffering and preheating are conducted on the variable-frequency air conditioner; the target frequency Fd is compared with the frequency Fb, and the frequency of the variable-frequency compressor is controlled to directly drop to the target frequency Fd if the target frequency Fd is smaller than the frequency Fb; the second frequency Fb of the variable-frequency compressor is controlled to be stabilized at the target frequency Fb after frequency rising and frequency dropping are conducted multiple times if the target frequency Fd is larger than the frequency Fb. According to the start control method and system for the variable-frequency air conditioner and the air conditioner, frequency rising of an air-conditioning system can be achieved, and the situations that safe operation of the compressor is affected due to the fact that oil is excessively discharged during frequency rising of the compressor and other components of the system are damaged due to the fact that the pressure difference changes too rapidly are avoided.
Description
Technical field
The present invention relates to airconditioning control field, particularly a kind of convertible frequency air-conditioner starts control method, control system and air-conditioner thereof.
Background technology
When frequency-changeable compressor starts, often need, while taking into account refrigerating/heating effect, to consider the reliability of compressor operating.Existing general Starting mode is that compressor frequency rises to realize refrigeration or heating effect step by step.The rising step by step of frequency-changeable compressor frequency, for the severe operating mode that some are special, as ultralow temperature heats, because the hysteresis quality of refrigerant flow circuit in systems in which, just can produce larger pressure ratio, larger wearing and tearing are produced to compressor, reduce the service life of system; Simultaneously reach higher frequency fast, the oil of the compressor rate that spues can be caused comparatively large, system also can be made to produce the oil return bad impact such as bad.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of convertible frequency air-conditioner and starts control method, control system and air-conditioner thereof, solves prior art and can produce compared with galling compressor and make system produce the bad technical problem of oil return.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of convertible frequency air-conditioner starts control method, comprises the following steps:
S1: setting target frequency Fd, first frequency Fa and second frequency Fb;
S2: the frequency-changeable compressor frequency controlling convertible frequency air-conditioner rises to described first frequency Fa, and the cross valve commutation moving to described convertible frequency air-conditioner with described first frequency Fa;
S3: after the cross valve commutation of described convertible frequency air-conditioner, the frequency controlling described frequency-changeable compressor drops to second frequency Fb from first frequency Fa, and remain on second frequency Fb operation preset time T 1, pressure buffer and preheating are carried out to described convertible frequency air-conditioner;
S4: the size of more described target frequency Fd and described second frequency Fb, if target frequency Fd is less than second frequency Fb, then the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd; If target frequency Fd is greater than second frequency Fb, then the frequency Fb controlling described frequency-changeable compressor is stabilized in target frequency Fd after repeatedly lifting frequency.
The invention has the beneficial effects as follows: the present invention can realize the raising frequency of air-conditioning system, avoiding telling in compressor raising frequency process oil too much affect compressor safe operation and other parts of system because of system pressure difference and changes the too fast damage caused.
On the basis of technique scheme, the present invention can also do following improvement.
Further, in described step 4, when target frequency Fd is greater than second frequency Fb, control method is specially:
S41: value circle of setting intermediate frequency Fc, described intermediate frequency Fc is between target frequency Fd and second frequency Fb;
S42: the frequency controlling described frequency-changeable compressor rises to described intermediate frequency Fc from second frequency Fb, and remain on described intermediate frequency Fc operation preset time T 2;
After the S43:T2 time terminates, the frequency controlling described frequency-changeable compressor rises to described target frequency Fd from intermediate frequency Fc, and remains on target frequency Fd operation preset time T 3;
After the S44:T3 time terminates, the frequency controlling described frequency-changeable compressor replaces lifting frequency, until the frequency of described frequency-changeable compressor is stabilized in target frequency Fd between target frequency Fd and intermediate frequency Fc.
Further, in step 1, the scope of described first frequency Fa is 30 ~ 60HZ, and the scope of described second frequency Fb is 20 ~ 40HZ.
Further, described frequency-changeable compressor remains on the running time of first frequency Fa is 60 ~ 120s; In step 3, the running time T 1 that described frequency-changeable compressor remains on second frequency Fb is 60 ~ 120s.
Further, the scope of described intermediate frequency Fc is 50HZ ~ 90HZ, described target frequency Fd be not less than intermediate frequency Fc and 10HZ and.
Further, the span of described T2 time is 120s ~ 180s; The span of described T3 time is 60s ~ 120s.
A kind of convertible frequency air-conditioner starts control system, comprises the first setting module, raising frequency module, frequency reducing module and control module,
Described first setting module is for setting target frequency Fd, first frequency Fa and second frequency Fb;
Described raising frequency module rises to described first frequency Fa for the frequency-changeable compressor frequency controlling convertible frequency air-conditioner, and moves to the cross valve commutation of described convertible frequency air-conditioner with described first frequency Fa;
Described frequency reducing module is used for after the cross valve commutation of described convertible frequency air-conditioner, the frequency controlling described frequency-changeable compressor drops to second frequency Fb from first frequency Fa, and remain on second frequency Fb operation preset time T 1, pressure buffer and preheating are carried out to described convertible frequency air-conditioner;
Described control module is used for the size of more described target frequency Fd and described second frequency Fb, if target frequency Fd is less than second frequency Fb, then the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd; If target frequency Fd is greater than second frequency Fb, then the frequency Fb controlling described frequency-changeable compressor is stabilized in target frequency Fd after repeatedly lifting frequency.
Further, described judge module comprises the second setup unit, judging unit, the first control unit and the second control unit,
Described second setup unit is for setting intermediate frequency Fc, and value circle of described intermediate frequency Fc is between target frequency Fd and second frequency Fb;
Described judging unit is used for the size of more described target frequency Fd and described second frequency Fb;
Described first control unit is used for being less than second frequency Fb as target frequency Fd, and the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd;
Described second control unit is used for when target frequency Fd is greater than second frequency Fb, and the frequency controlling described frequency-changeable compressor rises to described intermediate frequency Fc from second frequency Fb, and remains on described intermediate frequency Fc operation preset time T 2; And after the T2 time terminates, the frequency controlling described frequency-changeable compressor rises to described target frequency Fd from intermediate frequency Fc, and remain on target frequency Fd operation preset time T 3; After the T3 time terminates, the frequency controlling described frequency-changeable compressor replaces lifting frequency, until the frequency of described frequency-changeable compressor is stabilized in target frequency Fd between target frequency Fd and intermediate frequency Fc.
A kind of air-conditioner, comprises described convertible frequency air-conditioner and starts control system.
Further, described air-conditioner comprises the frequency-changeable compressor of a frequency-changeable compressor or multiple parallel connection.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that a kind of convertible frequency air-conditioner of the present invention starts control method;
Fig. 2 is the structural representation that a kind of convertible frequency air-conditioner of the present invention starts control system;
Fig. 3 is the structural representation of air-conditioner of the present invention;
Fig. 4 is the structural representation of the air-conditioner of the embodiment of the present invention.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, for a kind of convertible frequency air-conditioner of the present invention starts the schematic flow sheet of control method, comprise the following steps:
Step 1, setting target frequency Fd, first frequency Fa and second frequency Fb.
Step 2, controls the frequency-changeable compressor frequency of convertible frequency air-conditioner and rises to first frequency Fa, and remains on first frequency Fa and run a period of time, until set up enough pressure reduction so that the cross valve commutation of described convertible frequency air-conditioner; Preferably, the scope of described first frequency Fa is 30 ~ 60HZ, such as 40HZ or 50HZ; The running time that described frequency-changeable compressor remains on first frequency Fa is 60 ~ 120s, such as 80s or 100s.
Step 3, after the cross valve commutation of described convertible frequency air-conditioner, the frequency controlling described frequency-changeable compressor drops to second frequency Fb from first frequency Fa, and remains on the second frequency Fb operation T1 time, carries out pressure buffer and preheating to described convertible frequency air-conditioner; Preferably, the scope of described second frequency Fb is 20 ~ 40HZ, such as 30HZ; The running time T 1 that described frequency-changeable compressor remains on second frequency Fb is 60 ~ 120s, such as 80s or 100s.
Step 4, the size of more described target frequency Fd and described second frequency Fb, if target frequency Fd is less than second frequency Fb, then the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd; If target frequency Fd is greater than second frequency Fb, then the frequency Fb controlling described frequency-changeable compressor is stabilized in target frequency Fd after repeatedly lifting frequency.When target frequency Fd is greater than second frequency Fb, control method is specially:
Value circle of setting intermediate frequency Fc, described intermediate frequency Fc is between target frequency Fd and second frequency Fb; Preferably, the scope of described intermediate frequency Fc is 50HZ ~ 90HZ, such as 50HZ, 60HZ, 70HZ, 80HZ, 90HZ; Described target frequency Fd >=intermediate frequency Fc+10HZ;
The frequency controlling described frequency-changeable compressor rises to described intermediate frequency Fc from second frequency Fb, and remains on the described intermediate frequency Fc operation T2 time, and preferably, the span of described T2 time is 120s ~ 180s, such as 140s, 160s, 150s, 170s etc.;
After the T2 time terminates, the frequency controlling described frequency-changeable compressor rises to described target frequency Fd from intermediate frequency, and remains on the target frequency Fd operation T3 time, and the span of described T3 time is 60s ~ 120s, such as 80s, 100s etc.;
After the T3 time terminates, the frequency controlling described frequency-changeable compressor replaces lifting frequency, until the frequency of described frequency-changeable compressor is stabilized in target frequency Fd between target frequency Fd and intermediate frequency Fc.
Fig. 2 is the structural representation that a kind of convertible frequency air-conditioner of the present invention starts control system, comprises the first setting module, raising frequency module, frequency reducing module and control module,
Described first setting module is for setting target frequency Fd, first frequency Fa and second frequency Fb;
Described raising frequency module rises to described first frequency Fa for the frequency-changeable compressor frequency controlling convertible frequency air-conditioner, and moves to the cross valve commutation of described convertible frequency air-conditioner with described first frequency Fa;
Described frequency reducing module is used for after the cross valve commutation of described convertible frequency air-conditioner, the frequency controlling described frequency-changeable compressor drops to second frequency Fb from first frequency Fa, and remain on second frequency Fb operation preset time T 1, pressure buffer and preheating are carried out to described convertible frequency air-conditioner;
Described control module is used for the size of more described target frequency Fd and described second frequency Fb, if target frequency Fd is less than second frequency Fb, then the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd; If target frequency Fd is greater than second frequency Fb, then the frequency Fb controlling described frequency-changeable compressor is stabilized in target frequency Fd after repeatedly lifting frequency.
In the present embodiment, described control module comprises the second setup unit, judging unit, the first control unit and the second control unit,
Described second setup unit is for setting intermediate frequency Fc, and value circle of described intermediate frequency Fc is between target frequency Fd and second frequency Fb;
Described judging unit is used for the size of more described target frequency Fd and described second frequency Fb;
Described first control unit is used for being less than second frequency Fb as target frequency Fd, and the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd;
Described second control unit is used for when target frequency Fd is greater than second frequency Fb, and the frequency controlling described frequency-changeable compressor rises to described intermediate frequency Fc from second frequency Fb, and remains on described intermediate frequency Fc operation preset time T 2; And after the T2 time terminates, the frequency controlling described frequency-changeable compressor rises to described target frequency Fd from intermediate frequency Fc, and remain on target frequency Fd operation preset time T 3; After the T3 time terminates, the frequency controlling described frequency-changeable compressor replaces lifting frequency, until the frequency of described frequency-changeable compressor is stabilized in target frequency Fd between target frequency Fd and intermediate frequency Fc.
Fig. 3 is the structural representation of air-conditioner of the present invention, and as shown in Figure 3, described air-conditioner comprises described convertible frequency air-conditioner and starts control system.
Fig. 4 is the structural representation of a kind of air-conditioner of the embodiment of the present invention, and eliminate described convertible frequency air-conditioner in Fig. 4 and start control system, as shown in Figure 4, described air-conditioner comprises a frequency-changeable compressor, and described frequency-changeable compressor comprises exhaust outlet and gas returning port; Cross valve comprises exhaust port, condensation port, evaporimeter port and air intake duct port, and described exhaust port connects the exhaust outlet of described variable speed compressor; Outdoor heat exchanger arrival end connects described cross valve condensation port, and the port of export, by outdoor expansion valve connecting fluid side stop valve arrival end, described outdoor air cooling heat exchanger is provided with outdoor fan; The described liquid side stop valve port of export connects gas side stop valve arrival end by indoor set heat exchanger (not shown in FIG.), and the described gas side stop valve port of export connects the evaporimeter port of described cross valve; The air intake duct port of described cross valve connects the arrival end of low pressure tank, and the port of export of low pressure tank connects the gas returning port of described frequency-changeable compressor.In other embodiments, described air-conditioner can also comprise the frequency-changeable compressor of multiple parallel connection.
The present invention can realize the raising frequency of air-conditioning system, and avoiding telling in compressor raising frequency process oil too much affect compressor safe operation and other parts of system because of system pressure difference and change the too fast damage caused.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. convertible frequency air-conditioner starts a control method, comprises the following steps:
S1: setting target frequency Fd, first frequency Fa and second frequency Fb;
S2: the frequency-changeable compressor frequency controlling convertible frequency air-conditioner rises to described first frequency Fa, and the cross valve commutation moving to described convertible frequency air-conditioner with described first frequency Fa;
S3: after the cross valve commutation of described convertible frequency air-conditioner, the frequency controlling described frequency-changeable compressor drops to second frequency Fb from first frequency Fa, and remain on second frequency Fb operation preset time T 1, pressure buffer and preheating are carried out to described convertible frequency air-conditioner;
S4: the size of more described target frequency Fd and described second frequency Fb, if target frequency Fd is less than second frequency Fb, then the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd; If target frequency Fd is greater than second frequency Fb, then the frequency Fb controlling described frequency-changeable compressor is stabilized in target frequency Fd after repeatedly lifting frequency.
2. convertible frequency air-conditioner according to claim 1 starts control method, and it is characterized in that: in described step 4, when target frequency Fd is greater than second frequency Fb, control method is specially:
S41: value circle of setting intermediate frequency Fc, described intermediate frequency Fc is between target frequency Fd and second frequency Fb;
S42: the frequency controlling described frequency-changeable compressor rises to described intermediate frequency Fc from second frequency Fb, and remain on described intermediate frequency Fc operation preset time T 2;
After the S43:T2 time terminates, the frequency controlling described frequency-changeable compressor rises to described target frequency Fd from intermediate frequency Fc, and remains on target frequency Fd operation preset time T 3;
After the S44:T3 time terminates, the frequency controlling described frequency-changeable compressor replaces lifting frequency, until the frequency of described frequency-changeable compressor is stabilized in target frequency Fd between target frequency Fd and intermediate frequency Fc.
3. convertible frequency air-conditioner according to claim 1 starts control method, and it is characterized in that: in step 1, the scope of described first frequency Fa is 30 ~ 60HZ, and the scope of described second frequency Fb is 20 ~ 40HZ.
4. convertible frequency air-conditioner according to claim 1 starts control method, and it is characterized in that: in step 2, the running time that described frequency-changeable compressor remains on first frequency Fa is 60 ~ 120s; In step 3, the running time T 1 that described frequency-changeable compressor remains on second frequency Fb is 60 ~ 120s.
5. start control method according to the arbitrary described convertible frequency air-conditioner of claim 2 ~ 4, it is characterized in that: the scope of described intermediate frequency Fc is 50HZ ~ 90HZ, described target frequency Fd be not less than intermediate frequency Fc and 10HZ with.
6. convertible frequency air-conditioner according to claim 5 starts control method, it is characterized in that: the span of described T2 time is 120s ~ 180s; The span of described T3 time is 60s ~ 120s.
7. convertible frequency air-conditioner starts a control system, it is characterized in that: comprise the first setting module, raising frequency module, frequency reducing module and control module,
Described first setting module is for setting target frequency Fd, first frequency Fa and second frequency Fb;
Described raising frequency module rises to described first frequency Fa for the frequency-changeable compressor frequency controlling convertible frequency air-conditioner, and moves to the cross valve commutation of described convertible frequency air-conditioner with described first frequency Fa;
Described frequency reducing module is used for after the cross valve commutation of described convertible frequency air-conditioner, the frequency controlling described frequency-changeable compressor drops to second frequency Fb from first frequency Fa, and remain on second frequency Fb operation preset time T 1, pressure buffer and preheating are carried out to described convertible frequency air-conditioner;
Described control module is used for the size of more described target frequency Fd and described second frequency Fb, if target frequency Fd is less than second frequency Fb, then the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd; If target frequency Fd is greater than second frequency Fb, then the frequency Fb controlling described frequency-changeable compressor is stabilized in target frequency Fd after repeatedly lifting frequency.
8. convertible frequency air-conditioner according to claim 7 starts control system, it is characterized in that: described control module comprises the second setup unit, judging unit, the first control unit and the second control unit,
Described second setup unit is for setting intermediate frequency Fc, and value circle of described intermediate frequency Fc is between target frequency Fd and second frequency Fb;
Described judging unit is used for the size of more described target frequency Fd and described second frequency Fb;
Described first control unit is used for being less than second frequency Fb as target frequency Fd, and the frequency controlling described frequency-changeable compressor directly drops to target frequency Fd;
Described second control unit is used for when target frequency Fd is greater than second frequency Fb, and the frequency controlling described frequency-changeable compressor rises to described intermediate frequency Fc from second frequency Fb, and remains on described intermediate frequency Fc operation preset time T 2; And after the T2 time terminates, the frequency controlling described frequency-changeable compressor rises to described target frequency Fd from intermediate frequency Fc, and remain on target frequency Fd operation preset time T 3; After the T3 time terminates, the frequency controlling described frequency-changeable compressor replaces lifting frequency, until the frequency of described frequency-changeable compressor is stabilized in target frequency Fd between target frequency Fd and intermediate frequency Fc.
9. an air-conditioner, is characterized in that: the convertible frequency air-conditioner comprised described in claim 6 or 7 starts control system.
10. air-conditioner according to claim 9, is characterized in that: described air-conditioner comprises the frequency-changeable compressor of a frequency-changeable compressor or multiple parallel connection.
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| WO2020215834A1 (en) * | 2019-04-26 | 2020-10-29 | 青岛海尔空调器有限总公司 | Control method and apparatus for variable frequency air conditioner and variable frequency air conditioner |
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| CN107940796A (en) * | 2017-12-11 | 2018-04-20 | 广东美的暖通设备有限公司 | The startup control method of multi-line system and its outdoor unit |
| WO2020215834A1 (en) * | 2019-04-26 | 2020-10-29 | 青岛海尔空调器有限总公司 | Control method and apparatus for variable frequency air conditioner and variable frequency air conditioner |
| CN114440408A (en) * | 2021-12-09 | 2022-05-06 | 海信（山东）空调有限公司 | Four-way valve control method and device for multi-split air conditioner and multi-split air conditioner |
| CN114440408B (en) * | 2021-12-09 | 2023-10-31 | 海信空调有限公司 | Four-way valve control method and device for one-to-many air conditioner and one-to-many air conditioner |
| CN114593508A (en) * | 2022-04-19 | 2022-06-07 | 珠海格力电器股份有限公司 | Compressor control method, storage medium, air conditioner control device and air conditioner |
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