CN105091226A - Control method and device for air conditioner system - Google Patents
Control method and device for air conditioner system Download PDFInfo
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- CN105091226A CN105091226A CN201510481225.8A CN201510481225A CN105091226A CN 105091226 A CN105091226 A CN 105091226A CN 201510481225 A CN201510481225 A CN 201510481225A CN 105091226 A CN105091226 A CN 105091226A
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- conditioning system
- air
- heat exchanger
- outdoor heat
- outlet temperature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
Abstract
The invention discloses a control method for an air conditioner system. The control method includes the following steps that when the air conditioner system gets into a defrosting mode, the outlet temperature of an outdoor heat exchanger is detected; when the air conditioner system meets the condition for quitting the defrosting mode, the outlet temperature of the outdoor heat exchanger is judged; if the outlet temperature of the outdoor heat exchanger is higher than a preset temperature, the air conditioner system is directly controlled to get into a heating mode; and if the outlet temperature of the outdoor heat exchanger is smaller than or equal to the preset temperature, the opening degree of a throttling component is increased through adjustment so that the outlet temperature of the outdoor heat exchanger can be higher than the preset temperature, time starts to be kept when the outlet temperature of the outdoor heat exchanger is larger than the preset temperature, and the air conditioner system is controlled to get into the heating model until the kept time is longer than preset time. By means of the control method of the air conditioner system, the problem of abnormal operation of the air conditioner system caused when the throttling component is blocked by lubricating oil in the heating process of the air conditioner system is solved, and normal heating of the air conditioner system is guaranteed. The invention further discloses a control device for the air conditioner system.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of control method of air-conditioning system and a kind of control device of air-conditioning system.
Background technology
At present, depletion of the ozone layer and global warming have become increasingly serious Global Environmental Problems, and normally used cold-producing medium R22 and R410A of refrigeration industry all can impact environment.
Because carbon-hydrogen refrigerant HCs has outstanding environmental friendliness characteristic, i.e. low GWP (GlobalWarmingPotential, global warming potential value) and ODP (OzoneDepletionPotential, ozone depletion latent energy value) be 0, be applied to more and more in refrigeration industry.Along with the use within the compressor of HCs refrigerant, also there is many problems needs to solve, and such as, after easily there is defrosting transformation of ownership heat under low-temperature heating operating mode, lubricating oil blocks throttle part, thus causes air-conditioning system normally to heat.
Summary of the invention
The application makes the understanding of following problem and research based on inventor:
When the refrigerant selecting carbon-hydrogen refrigerant HCs as air-conditioning system, pour point due to lubricating oil is too high and coolant injection amount is few, defrosting terminates front throttle part outlet temperature for a long time at lower temperature (such as less than-25 DEG C), but the pour point of lubricating oil is higher, after frostization is clean, make the refrigerant in outdoor heat exchanger (containing the oil come that spued by compressor) sufficiently cooledly be still gaseous state because outdoor fan does not turn, and now cold medium flux is little, lubricating oil is difficult to be brought back compressor and gathers gradually at outdoor heat exchanger, the high pressure high density gas before transformation of ownership heat is become when compressor air suction after air-conditioning system transformation of ownership heat is instantaneous, flow instantaneous change is large, and (lubricating oil is oppositely drawn into throttle part by instantaneous, and before this throttle part temperature for a long time lower than-25 DEG C, lubricating oil is made to be blocked in throttle part lower than oily gaseous coolant mixture pour point (lower than pure oily pour point).Wherein, oil gaseous coolant mixture is can not flow lower than during oily gaseous coolant mixture pour point, only could flow higher than during oily gaseous coolant mixture pour point, therefore, oil gaseous coolant mixture is lower than under oily gaseous coolant mixture pour point, if throttle part temperature is for a long time lower than-25 DEG C, namely lower than oily gaseous coolant mixture pour point, oily gaseous coolant mixture herein can be made not flow and to be blocked in throttle part.
The present invention is intended to solve one of technical problem in above-mentioned technology at least to a certain extent.For this reason, one object of the present invention is the control method proposing a kind of air-conditioning system, can solve lubricating oil in air-conditioning system heating operations and blocks throttle part and cause the problem of air-conditioning system operation exception, ensure that air-conditioning system normally heats.
Another object of the present invention is the control device proposing a kind of air-conditioning system.
For achieving the above object, one aspect of the present invention embodiment proposes a kind of control method of air-conditioning system, wherein, described air-conditioning system comprises outdoor heat exchanger and throttle part, described control method comprises the following steps: when described air-conditioning system enters defrosting mode, detect the outlet temperature of described outdoor heat exchanger; When described air-conditioning system meets the condition exiting described defrosting mode, judge the outlet temperature of described outdoor heat exchanger; If the outlet temperature of described outdoor heat exchanger is greater than preset temperature, then directly controls described air-conditioning system and enter heating mode; If the outlet temperature of described outdoor heat exchanger is less than or equal to described preset temperature, the aperture then tuning up described throttle part is greater than described preset temperature to make the outlet temperature of described outdoor heat exchanger, and start timing when the outlet temperature of described outdoor heat exchanger is greater than described preset temperature, until after timing time is greater than Preset Time, controls described air-conditioning system and enter described heating mode.
According to the control method of the air-conditioning system of the embodiment of the present invention, when air-conditioning system switches from defrosting mode to heating mode, judge the outlet temperature of outdoor heat exchanger, if the outlet temperature of outdoor heat exchanger is greater than preset temperature, then directly control air-conditioning system and enter heating mode, if and the outlet temperature of outdoor heat exchanger is less than or equal to preset temperature, aperture then by tuning up throttle part is greater than preset temperature to make the outlet temperature of outdoor heat exchanger, and start timing when the outlet temperature of outdoor heat exchanger is greater than preset temperature, until timing time just controls air-conditioning system after being greater than Preset Time enter heating mode, thus the blocking throttle part of lubricating oil in air-conditioning system heating operations can be solved and cause the problem of air-conditioning system operation exception, ensure that air-conditioning system normally heats, make the reliable and stable operation of air-conditioning system.
Wherein, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
According to one embodiment of present invention, described preset temperature is less than the pour point of lubricating oil in described air-conditioning system.
According to a specific embodiment of the present invention, described preset temperature is-10 DEG C ~-100 DEG C.
For achieving the above object, the present invention on the other hand embodiment proposes a kind of control device of air-conditioning system, wherein, described air-conditioning system comprises outdoor heat exchanger and throttle part, described control device comprises: temperature detecting module, for detecting the outlet temperature of described outdoor heat exchanger when described air-conditioning system enters defrosting mode; Timer; Control module, for judging the outlet temperature of described outdoor heat exchanger when described air-conditioning system meets the condition exiting described defrosting mode, wherein, if the outlet temperature of described outdoor heat exchanger is greater than preset temperature, described control module then directly controls described air-conditioning system and enters heating mode; If the outlet temperature of described outdoor heat exchanger is less than or equal to described preset temperature, the aperture that described control module then tunes up described throttle part is greater than described preset temperature to make the outlet temperature of described outdoor heat exchanger, and described timer starts timing when the outlet temperature of described outdoor heat exchanger is greater than described preset temperature, until after timing time is greater than Preset Time, described control module controls described air-conditioning system and enters described heating mode.
According to the control device of the air-conditioning system of the embodiment of the present invention, when air-conditioning system switches from defrosting mode to heating mode, control module judges the outlet temperature of outdoor heat exchanger, if the outlet temperature of outdoor heat exchanger is greater than preset temperature, then directly control air-conditioning system and enter heating mode, if and the outlet temperature of outdoor heat exchanger is less than or equal to preset temperature, aperture then by tuning up throttle part is greater than preset temperature to make the outlet temperature of outdoor heat exchanger, and start timing when the outlet temperature of outdoor heat exchanger is greater than preset temperature, until timing time just controls air-conditioning system after being greater than Preset Time enter heating mode, thus the blocking throttle part of lubricating oil in air-conditioning system heating operations can be solved and cause the problem of air-conditioning system operation exception, ensure that air-conditioning system normally heats, make the reliable and stable operation of air-conditioning system.
Wherein, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
According to one embodiment of present invention, described preset temperature is less than the pour point of lubricating oil in described air-conditioning system.
According to one embodiment of present invention, described preset temperature is-10 DEG C ~-100 DEG C.
Accompanying drawing explanation
Fig. 1 is the flow chart of the control method of air-conditioning system according to the embodiment of the present invention;
Fig. 2 is the flow chart of the control method of air-conditioning system according to the present invention's specific embodiment; And
Fig. 3 is the block diagram of the control device of air-conditioning system according to the embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
The control method of air-conditioning system and the control device of air-conditioning system that propose according to the embodiment of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the control method of air-conditioning system according to the embodiment of the present invention, wherein, the air-conditioning system of the embodiment of the present invention comprises outdoor heat exchanger, throttle part such as electric expansion valve, certainly also comprises the miscellaneous part such as compressor, indoor heat exchanger, is just no longer described in detail here.
As shown in Figure 1, the control method of this air-conditioning system comprises the following steps:
S1, when air-conditioning system enters defrosting mode, the outlet temperature of sensing chamber's external heat exchanger.
Wherein, carry out the outlet temperature T3 of sensing chamber's external heat exchanger by temperature sensor, and temperature sensor can any position between heat exchanger disposed in the outdoor and throttle part.
S2, when air-conditioning system meets the condition exiting defrosting mode, judges the outlet temperature of outdoor heat exchanger.
S3, if the outlet temperature of outdoor heat exchanger is greater than preset temperature, then directly controls air-conditioning system and enters heating mode.
S4, if the outlet temperature of outdoor heat exchanger is less than or equal to preset temperature, the aperture then tuning up throttle part is greater than preset temperature to make the outlet temperature of outdoor heat exchanger, and start timing when the outlet temperature of outdoor heat exchanger is greater than preset temperature, until after timing time is greater than Preset Time, controls air-conditioning system and enter heating mode.
Wherein, the refrigerant in air-conditioning system can be carbon-hydrogen refrigerant HCs.
Further, according to one embodiment of present invention, preset temperature t is less than the pour point of lubricating oil in air-conditioning system, such as, can be-10 DEG C ~-100 DEG C.That is, preset temperature t is negative value, and relevant with the oil pour point of lubricating oil, usually low than oil pour point.
Preferably, preset temperature t can be-20 DEG C.
Particularly, according to one embodiment of present invention, as shown in Figure 2, the control method of above-mentioned air-conditioning system comprises the following steps:
S201, air-conditioning system is run with defrosting mode.
S202, the outlet temperature T3 of sensing chamber's external heat exchanger and condenser.
S203, when air-conditioning system meets the condition exiting defrosting mode, judges temperature value T3 now.If T3 is greater than preset temperature t, then perform step S207; If T3 is less than or equal to preset temperature t, then perform step S204.
S204, is greater than preset temperature t by the aperture tuning up throttle part such as electric expansion valve to make T3, then performs step S205.
S205, starts timing.
S206, judges whether timing time is greater than Preset Time such as n minute.If so, step S207 is performed; If not, then step S205 is returned.
S207, controls air-conditioning system and enters heating mode.
Wherein, within Preset Time n minute, can be 0.5 ~ 10 minute, preferably, can be 1 minute.
In sum, according to the control method of the air-conditioning system of the embodiment of the present invention, when air-conditioning system switches from defrosting mode to heating mode, judge the outlet temperature of outdoor heat exchanger, if the outlet temperature of outdoor heat exchanger is greater than preset temperature, then directly control air-conditioning system and enter heating mode, if and the outlet temperature of outdoor heat exchanger is less than or equal to preset temperature, aperture then by tuning up throttle part is greater than preset temperature to make the outlet temperature of outdoor heat exchanger, and start timing when the outlet temperature of outdoor heat exchanger is greater than preset temperature, until timing time just controls air-conditioning system after being greater than Preset Time enter heating mode, thus the blocking throttle part of lubricating oil in air-conditioning system heating operations can be solved and cause the problem of air-conditioning system operation exception, ensure that air-conditioning system normally heats, make the reliable and stable operation of air-conditioning system.
Fig. 3 is the block diagram of the control device of air-conditioning system according to an embodiment of the invention, wherein, this air-conditioning system comprises outdoor heat exchanger, throttle part such as electric expansion valve, certainly also comprises the miscellaneous part such as compressor, indoor heat exchanger, is just no longer described in detail here.As shown in Figure 3, the control device of this air-conditioning system comprises temperature detecting module 10, timer 20 and control module 30.
Wherein, temperature detecting module 10 is for detecting the outlet temperature T3 of described outdoor heat exchanger when described air-conditioning system enters defrosting mode, control module 30 is for judging the outlet temperature T3 of described outdoor heat exchanger when described air-conditioning system meets the condition exiting described defrosting mode, wherein, if the outlet temperature T3 of outdoor heat exchanger is greater than preset temperature t, control module 30 directly controls air-conditioning system and enters heating mode; If the outlet temperature T3 of outdoor heat exchanger is less than or equal to preset temperature t, the aperture that control module 30 tunes up throttle part such as electric expansion valve is greater than preset temperature t to make the outlet temperature T3 of outdoor heat exchanger, and timer 20 starts timing when the outlet temperature T3 of outdoor heat exchanger is greater than preset temperature t, until timing time is greater than Preset Time after such as n minute, control module 30 controls air-conditioning system and enters heating mode.
According to one embodiment of present invention, timer 20 accessible site is in control module 30.
Particularly, temperature detecting module 10 can comprise temperature sensor, and temperature sensor can any position between heat exchanger disposed in the outdoor and throttle part, as long as can the outlet temperature of sensing chamber's external heat exchanger.
According to one embodiment of present invention, preset temperature t is less than the pour point of lubricating oil in air-conditioning system, such as, can be-10 DEG C ~-100 DEG C.That is, preset temperature t is negative value, and relevant with the oil pour point of lubricating oil, usually low than oil pour point.
Preferably, preset temperature t can be-20 DEG C.
According to an example of the present invention, within Preset Time n minute, can be 0.5 ~ 10 minute, preferably, can be 1 minute.
Further, in an embodiment of the present invention, the refrigerant in air-conditioning system can be carbon-hydrogen refrigerant HCs.
According to the control device of the air-conditioning system of the embodiment of the present invention, when air-conditioning system switches from defrosting mode to heating mode, control module judges the outlet temperature of outdoor heat exchanger, if the outlet temperature of outdoor heat exchanger is greater than preset temperature, then directly control air-conditioning system and enter heating mode, if and the outlet temperature of outdoor heat exchanger is less than or equal to preset temperature, aperture then by tuning up throttle part is greater than preset temperature to make the outlet temperature of outdoor heat exchanger, and start timing when the outlet temperature of outdoor heat exchanger is greater than preset temperature, until timing time just controls air-conditioning system after being greater than Preset Time enter heating mode, thus the blocking throttle part of lubricating oil in air-conditioning system heating operations can be solved and cause the problem of air-conditioning system operation exception, ensure that air-conditioning system normally heats, make the reliable and stable operation of air-conditioning system.
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 (8)
1. a control method for air-conditioning system, is characterized in that, described air-conditioning system comprises outdoor heat exchanger and throttle part, and described control method comprises the following steps:
When described air-conditioning system enters defrosting mode, detect the outlet temperature of described outdoor heat exchanger;
When described air-conditioning system meets the condition exiting described defrosting mode, judge the outlet temperature of described outdoor heat exchanger;
If the outlet temperature of described outdoor heat exchanger is greater than preset temperature, then directly controls described air-conditioning system and enter heating mode;
If the outlet temperature of described outdoor heat exchanger is less than or equal to described preset temperature, the aperture then tuning up described throttle part is greater than described preset temperature to make the outlet temperature of described outdoor heat exchanger, and start timing when the outlet temperature of described outdoor heat exchanger is greater than described preset temperature, until after timing time is greater than Preset Time, controls described air-conditioning system and enter described heating mode.
2. the control method of air-conditioning system as claimed in claim 1, it is characterized in that, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
3. the control method of air-conditioning system as claimed in claim 1 or 2, it is characterized in that, described preset temperature is less than the pour point of lubricating oil in described air-conditioning system.
4. the control method of air-conditioning system as claimed in claim 3, it is characterized in that, described preset temperature is-10 DEG C ~-100 DEG C.
5. a control device for air-conditioning system, is characterized in that, described air-conditioning system comprises outdoor heat exchanger and throttle part, and described control device comprises:
Temperature detecting module, for detecting the outlet temperature of described outdoor heat exchanger when described air-conditioning system enters defrosting mode;
Timer;
Control module, for judging the outlet temperature of described outdoor heat exchanger when described air-conditioning system meets the condition exiting described defrosting mode, wherein,
If the outlet temperature of described outdoor heat exchanger is greater than preset temperature, described control module then directly controls described air-conditioning system and enters heating mode;
If the outlet temperature of described outdoor heat exchanger is less than or equal to described preset temperature, the aperture that described control module then tunes up described throttle part is greater than described preset temperature to make the outlet temperature of described outdoor heat exchanger, and described timer starts timing when the outlet temperature of described outdoor heat exchanger is greater than described preset temperature, until after timing time is greater than Preset Time, described control module controls described air-conditioning system and enters described heating mode.
6. the control device of air-conditioning system as claimed in claim 5, it is characterized in that, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
7. the control device of the air-conditioning system as described in claim 5 or 6, is characterized in that, described preset temperature is less than the pour point of lubricating oil in described air-conditioning system.
8. the control device of air-conditioning system as claimed in claim 7, it is characterized in that, described preset temperature is-10 DEG C ~-100 DEG C.
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| CN201510481225.8A CN105091226B (en) | 2015-08-07 | 2015-08-07 | The control method and control device of air-conditioning system |
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| CN201510481225.8A CN105091226B (en) | 2015-08-07 | 2015-08-07 | The control method and control device of air-conditioning system |
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| CN107044718A (en) * | 2017-05-09 | 2017-08-15 | 广东美的制冷设备有限公司 | The control method of air conditioner, the control device of air conditioner and air conditioner |
| CN107143978A (en) * | 2017-05-17 | 2017-09-08 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method and device |
| CN107421058A (en) * | 2017-05-09 | 2017-12-01 | 广东美的制冷设备有限公司 | The control method of air conditioner, the control device of air conditioner and air conditioner |
| CN108444140A (en) * | 2018-05-08 | 2018-08-24 | 广东美的制冷设备有限公司 | Air conditioner and its control method and computer readable storage medium |
| CN108488997A (en) * | 2018-05-08 | 2018-09-04 | 广东美的制冷设备有限公司 | Air conditioner and its control method and computer readable storage medium |
| CN109059192A (en) * | 2018-06-20 | 2018-12-21 | 广东美的制冷设备有限公司 | The control method and device of compressor winding heating |
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| CN107421058A (en) * | 2017-05-09 | 2017-12-01 | 广东美的制冷设备有限公司 | The control method of air conditioner, the control device of air conditioner and air conditioner |
| CN107044718B (en) * | 2017-05-09 | 2019-10-22 | 广东美的制冷设备有限公司 | The control method of air conditioner, the control device of air conditioner and air conditioner |
| CN107143978A (en) * | 2017-05-17 | 2017-09-08 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method and device |
| CN108444140A (en) * | 2018-05-08 | 2018-08-24 | 广东美的制冷设备有限公司 | Air conditioner and its control method and computer readable storage medium |
| CN108488997A (en) * | 2018-05-08 | 2018-09-04 | 广东美的制冷设备有限公司 | Air conditioner and its control method and computer readable storage medium |
| CN109059192A (en) * | 2018-06-20 | 2018-12-21 | 广东美的制冷设备有限公司 | The control method and device of compressor winding heating |
| CN109059192B (en) * | 2018-06-20 | 2021-04-20 | 广东美的制冷设备有限公司 | Control method and device for heating compressor winding |
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