CN105066354A - Control method and device for air conditioning system - Google Patents
Control method and device for air conditioning system Download PDFInfo
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- CN105066354A CN105066354A CN201510486632.8A CN201510486632A CN105066354A CN 105066354 A CN105066354 A CN 105066354A CN 201510486632 A CN201510486632 A CN 201510486632A CN 105066354 A CN105066354 A CN 105066354A
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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
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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
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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
- F24F2110/00—Control inputs relating to air properties
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method for an air conditioning system. The method includes the following steps that after the air conditioning system enters a heating mode, the temperature T2 of the middle of an indoor heat exchanger and the temperature Tb of a compressor are detected, and the difference delta T of the temperature T2 of the middle of the indoor heat exchanger and the temperature Tb of the compressor is calculated through the equation delta T=Tb-T2; when the air conditioning system meets the condition of a defrosting mode, whether delta T is larger than a preset temperature threshold value or not is judged; if it is judged that delta T is smaller than or equal to the preset temperature threshold value, operation parameters of the air conditioning system are adjusted, so that time starts to be counted after delta T is larger than the preset temperature threshold value, the air conditioning system is controlled to enter the defrosting mode when the counted time is longer than preset time, and therefore the coolant circulating amount of the air conditioning system in the defrosting process is guaranteed. By the adoption of the control method for the air conditioning system, the problem that the coolant circulating amount of the air conditioning system in the defrosting process is too low can be solved and normal defrosting operation of the air conditioning system is guaranteed. The invention further discloses a control device for the air conditioning 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
The air-conditioning refrigerant selected at present need consider the impact on atmospheric ozone layer and global warming simultaneously, such as the carbon-hydrogen refrigerant HCs such as R290 (propane), R1270 (propylene) is 0 to depletion of the ozone layer coefficient, greenhouse coefficient is less, thermal performance is excellent, it is the desirable material that cold-producing medium R410A, R22 substitute for a long time, but this carbon-hydrogen refrigerant HCs charging amount is few, very good again with mineral oil intermiscibility, thus occur that refrigerant circulation is too small sometimes in the process of defrosting, cause air-conditioning system normally to work.And if the oil selecting intermiscibility poor (as PAG oil) price is higher, thus considerably increase cost.
Summary of the invention
The application makes the understanding of following problem and research based on inventor:
Selecting R290 (propane), during the refrigerant of the carbon-hydrogen refrigerant HCs such as R1270 (propylene) as air-conditioning system, if compressor over-heat at the bottom degree less (as about 2 DEG C), bottom compressor, coolant quantity is almost more than 2 times of oil mass, coolant injection amount simultaneously in air-conditioning system inherently few (some system even charging amount only has about 30% of same capabilities efficiency R22 system) can cause the coolant quantity in outdoor heat exchanger (condenser) to reduce amplitude sometimes up to more than 60%, if at this moment air-conditioning system defrosts, condenser is without degree of supercooling, what enter throttle part is gaseous state and non-liquid, when the refrigerant entering throttle part contains the specific volume large (if when 20 DEG C R290 saturated gas specific volume be 27 times of saturated liquid) of specific volume than liquid refrigerants of gaseous coolant and gaseous coolant, thus cause the throttling performance degradation of throttle part, air-conditioning system cannot normally defrost.
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 the problem that in air-conditioning system defrost process, refrigerant circulation is too small, ensures that air-conditioning system normally defrosts.
Another object of the present invention is the control device proposing a kind of air-conditioning system.
For achieving the above object, the control method of a kind of air-conditioning system that one aspect of the present invention embodiment proposes, it is characterized in that, comprise the following steps: after described air-conditioning system enters heating mode, detect the middle portion temperature T2 of indoor heat exchanger and the temperature Tb of compressor, and calculate the difference △ T=Tb-T2 of the temperature Tb of described compressor and the middle portion temperature T2 of described indoor heat exchanger; When described air-conditioning system meets the condition entering defrosting mode, judge whether △ T is greater than preset temperature threshold value; If judge that △ T is less than or equal to described preset temperature threshold value, then by regulating the operational factor of described air-conditioning system to start timing after making described △ T be greater than described preset temperature threshold value, and control described air-conditioning system when timing time is greater than Preset Time and enter described defrosting mode, to guarantee refrigerant circulation when described air-conditioning system defrosts.
According to the control method of the air-conditioning system of the embodiment of the present invention, when air-conditioning system switches from heating mode to defrosting mode, directly do not switch, but carry out suitable time-delay again after being greater than preset temperature threshold value by the difference △ T of the middle portion temperature T2 of the temperature Tb that judges compressor and indoor heat exchanger and just switch, namely after △ T is greater than preset temperature threshold value, timing is started, until timing time just controls air-conditioning system after being greater than Preset Time enter defrosting mode, thus the problem that in air-conditioning system defrost process, refrigerant circulation is too small can be solved, ensure that air-conditioning system normally defrosts, make the reliable and stable operation of air-conditioning system.
According to one embodiment of present invention, if judge that △ T is greater than described preset temperature threshold value, then directly timing is started.
According to one embodiment of present invention, regulate the operational factor of described air-conditioning system, specifically comprise: the aperture turning throttle part down; Or heighten the running speed of compressor; Or heighten the air-out volume of indoor fan; Or heighten the air-out volume of outdoor fan.
Wherein, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
According to one embodiment of present invention, the temperature Tb of described compressor is the bottom temp of described compressor or the side temperature of described compressor.
For achieving the above object, the control device of a kind of air-conditioning system that the present invention's another aspect embodiment proposes, comprising: the first temperature detecting module, for detecting the middle portion temperature T2 of indoor heat exchanger after described air-conditioning system enters heating mode, second temperature detecting module, for detecting the temperature Tb of compressor after described air-conditioning system enters heating mode, timer, control module, for the difference △ T=Tb-T2 of the middle portion temperature T2 of the temperature Tb and described indoor heat exchanger that calculate described compressor, and judge when described air-conditioning system meets the condition entering defrosting mode whether △ T is greater than preset temperature threshold value, wherein, if judge that △ T is less than or equal to described preset temperature threshold value, described control module is then by regulating the operational factor of described air-conditioning system to start timing with described timer after making described △ T be greater than described preset temperature threshold value, and control described air-conditioning system when timing time is greater than Preset Time and enter described defrosting mode, to guarantee refrigerant circulation when described air-conditioning system defrosts.
According to the control device of the air-conditioning system of the embodiment of the present invention, when air-conditioning system switches from heating mode to defrosting mode, control module does not directly control air-conditioning system and switches, but carry out suitable time-delay after being greater than preset temperature threshold value by the difference △ T of the middle portion temperature T2 of the temperature Tb that judges compressor and indoor heat exchanger again and just control air-conditioning system and switch, namely after △ T is greater than preset temperature threshold value, timer starts timing, until timing time be greater than Preset Time after control module just control air-conditioning system and enter defrosting mode, thus the problem that in air-conditioning system defrost process, refrigerant circulation is too small can be solved, ensure that air-conditioning system normally defrosts, make the reliable and stable operation of air-conditioning system.
According to one embodiment of present invention, if judge that △ T is greater than described preset temperature threshold value, described timer then directly starts timing.
According to one embodiment of present invention, described control module is especially by turning the aperture of throttle part down or heightening the running speed of compressor or the air-out volume heightening indoor fan or the air-out volume of heightening outdoor fan is greater than described preset temperature threshold value to make described △ T.
Wherein, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
According to one embodiment of present invention, the temperature Tb of described compressor is the bottom temp of described compressor or the side temperature of described compressor.
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 the parts such as outdoor heat exchanger, indoor heat exchanger, compressor, throttle part such as electric expansion valve, indoor fan, outdoor fan, 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, after air-conditioning system enters heating mode, detects the middle portion temperature T2 of indoor heat exchanger and the temperature Tb of compressor, and calculates the difference △ T=Tb-T2 of the temperature Tb of compressor and the middle portion temperature T2 of indoor heat exchanger.
Wherein, the temperature Tb of compressor can be the bottom temp of compressor or the side temperature of compressor.Namely say, the position measuring compressor temperature can be the bottom of compressor or the lower house of compressor, also can be the side of compressor.
S2, when air-conditioning system meets the condition entering defrosting mode, judges whether △ T is greater than preset temperature threshold value.
Wherein, preset temperature threshold value t can be 0 ~ 20 DEG C.Further, when the temperature Tb of compressor is by measuring the bottom position temperature of compressor and obtaining, t can be 5 DEG C; When the temperature Tb of compressor is by measuring the lateral location temperature of compressor and obtaining, t can be 8 DEG C.
S3, if judge that △ T is less than or equal to preset temperature threshold value, then by regulating the operational factor of air-conditioning system to start timing after making △ T be greater than described preset temperature threshold value, and control air-conditioning system enters defrosting mode, to guarantee refrigerant circulation when air-conditioning system defrosts when timing time is greater than Preset Time.
Wherein, Preset Time can be the span of n minute, n is 1 ~ 10 minute, and preferably, n can be 3 minutes.
According to one embodiment of present invention, when described air-conditioning system meets the condition entering defrosting mode, if judge that △ T is greater than preset temperature threshold value t, then directly start timing, then control air-conditioning system when timing time is greater than Preset Time and enter defrosting mode, to guarantee refrigerant circulation when air-conditioning system defrosts.
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 heating mode.
S202, detects the middle portion temperature T2 of indoor heat exchanger and evaporimeter, and detects the temperature Tb of compressor, calculates △ T=Tb-T2.
S203, when air-conditioning system meets the condition entering defrosting mode (air-conditioning system according to present mode work, until meet the condition entering defrosting mode), judges △ T now.If △ T is greater than preset temperature threshold value t such as 5 DEG C, then perform step S205; If △ T is less than or equal to preset temperature threshold value t such as 5 DEG C, then perform step S204.
S204, regulates the operational factor of air-conditioning system to be greater than preset temperature threshold value t to make △ T, then performs step S205.
Wherein, regulate the operational factor of described air-conditioning system, specifically comprise: the aperture turning throttle part such as electric expansion valve down; Or heighten the running speed of compressor; Or heighten the air-out volume of indoor fan; Or heighten the air-out volume of outdoor fan.
S205, starts timing.
S206, when timing time be greater than Preset Time such as 3 minutes time, control air-conditioning system enter defrosting mode.
Wherein, after air-conditioning system defrosting terminates, when reentering heating mode, above-mentioned steps is repeated.
In an embodiment of the present invention, refrigerant in air-conditioning system can be carbon-hydrogen refrigerant HCs, thus the control method of the air-conditioning system of the embodiment of the present invention can solve the problem that in air-conditioning system defrost process, refrigerant circulation is too small, therefore can use more cheap mineral oil when air-conditioning system adopts the carbon-hydrogen refrigerant HCs such as propane refrigerant R290, propylene refrigeration agent R1270, reduce cost.
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 heating mode to defrosting mode, directly do not switch, but carry out suitable time-delay again after being greater than preset temperature threshold value by the difference △ T of the middle portion temperature T2 of the temperature Tb that judges compressor and indoor heat exchanger and just switch, namely after △ T is greater than preset temperature threshold value, timing is started, until timing time just controls air-conditioning system after being greater than Preset Time enter defrosting mode, thus the problem that in air-conditioning system defrost process, refrigerant circulation is too small can be solved, ensure that air-conditioning system normally defrosts, make the reliable and stable operation of air-conditioning system, and propane refrigerant R290 can be adopted in air-conditioning system, more cheap mineral oil is used during the carbon-hydrogen refrigerant HCs such as propylene refrigeration agent R1270, reduce cost.
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 the parts such as outdoor heat exchanger, indoor heat exchanger, compressor, throttle part such as electric expansion valve, indoor fan, outdoor fan, is just no longer described in detail here.As shown in Figure 3, the control device of this air-conditioning system comprises the first temperature detecting module 11, second temperature detecting module 12, timer 20 and control module 30.
Wherein, the first temperature detecting module 11 for detecting the middle portion temperature T2 of indoor heat exchanger after described air-conditioning system enters heating mode, and the second temperature detecting module 12 for detecting the temperature Tb of compressor after described air-conditioning system enters heating mode.
According to one embodiment of present invention, the temperature Tb of compressor is the bottom temp of compressor or the side temperature of compressor.Namely say, the position measuring compressor temperature can be the bottom of compressor or the lower house of compressor, also can be the side of compressor.
In an embodiment of the present invention, control module 30 is for the difference △ T=Tb-T2 of the middle portion temperature T2 of the temperature Tb and indoor heat exchanger that calculate compressor, and judge when air-conditioning system meets the condition entering defrosting mode whether △ T is greater than preset temperature threshold value, wherein, if judge that △ T is less than or equal to preset temperature threshold value t, control module 30 starts timing by regulating the operational factor of air-conditioning system with timer 20 after making △ T be greater than preset temperature threshold value t, and control air-conditioning system enters defrosting mode when timing time is greater than Preset Time such as n minute, to guarantee refrigerant circulation when air-conditioning system defrosts.Wherein, timer 20 accessible site is in control module 30.
Further, if judge that △ T is greater than preset temperature threshold value t, timer 20 directly starts timing, and then when timing time is greater than Preset Time, control module controls air-conditioning system and enters defrosting mode, to guarantee refrigerant circulation when air-conditioning system defrosts.
Particularly, preset temperature threshold value t can be 0 ~ 20 DEG C.Wherein, when the temperature Tb of compressor is by measuring the bottom position temperature of compressor and obtaining, t can be 5 DEG C; When the temperature Tb of compressor is by measuring the lateral location temperature of compressor and obtaining, t can be 8 DEG C.
Particularly, according to one embodiment of present invention, the span of n is 1 ~ 10 minute, and preferably, n can be 3 minutes.
According to one embodiment of present invention, control module 30 is specifically by turning the aperture of throttle part such as electric expansion valve down or heightening the running speed of compressor or the air-out volume heightening indoor fan or the air-out volume of heightening outdoor fan is greater than preset temperature threshold value t to make △ T.
In an embodiment of the present invention, refrigerant in air-conditioning system can be carbon-hydrogen refrigerant HCs, thus the control device of the air-conditioning system of the embodiment of the present invention can solve the problem that in air-conditioning system defrost process, refrigerant circulation is too small, therefore can use more cheap mineral oil when air-conditioning system adopts the carbon-hydrogen refrigerant HCs such as propane refrigerant R290, propylene refrigeration agent R1270, reduce cost.
According to the control device of the air-conditioning system of the embodiment of the present invention, when air-conditioning system switches from heating mode to defrosting mode, control module does not directly control air-conditioning system and switches, but carry out suitable time-delay after being greater than preset temperature threshold value by the difference △ T of the middle portion temperature T2 of the temperature Tb that judges compressor and indoor heat exchanger again and just control air-conditioning system and switch, namely after △ T is greater than preset temperature threshold value, timer starts timing, until timing time be greater than Preset Time after control module just control air-conditioning system and enter defrosting mode, thus the problem that in air-conditioning system defrost process, refrigerant circulation is too small can be solved, ensure that air-conditioning system normally defrosts, make the reliable and stable operation of air-conditioning system, and propane refrigerant R290 can be adopted in air-conditioning system, more cheap mineral oil is used during the carbon-hydrogen refrigerant HCs such as propylene refrigeration agent R1270, reduce cost.
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. a control method for air-conditioning system, is characterized in that, comprises the following steps:
After described air-conditioning system enters heating mode, detect the middle portion temperature T2 of indoor heat exchanger and the temperature Tb of compressor, and calculate the difference △ T=Tb-T2 of the temperature Tb of described compressor and the middle portion temperature T2 of described indoor heat exchanger;
When described air-conditioning system meets the condition entering defrosting mode, judge whether △ T is greater than preset temperature threshold value;
If judge that △ T is less than or equal to described preset temperature threshold value, then by regulating the operational factor of described air-conditioning system to start timing after making described △ T be greater than described preset temperature threshold value, and control described air-conditioning system when timing time is greater than Preset Time and enter described defrosting mode, to guarantee refrigerant circulation when described air-conditioning system defrosts.
2. the control method of air-conditioning system as claimed in claim 1, is characterized in that, if judge that △ T is greater than described preset temperature threshold value, then directly start timing.
3. the control method of air-conditioning system as claimed in claim 1, is characterized in that, regulate the operational factor of described air-conditioning system, specifically comprise:
Turn the aperture of throttle part down; Or
Heighten the running speed of compressor; Or
Heighten the air-out volume of indoor fan; Or
Heighten the air-out volume of outdoor fan.
4. the control method of the air-conditioning system according to any one of claim 1-3, is characterized in that, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
5. the control method of air-conditioning system as claimed in claim 1, it is characterized in that, the temperature Tb of described compressor is the bottom temp of described compressor or the side temperature of described compressor.
6. a control device for air-conditioning system, is characterized in that, comprising:
First temperature detecting module, for detecting the middle portion temperature T2 of indoor heat exchanger after described air-conditioning system enters heating mode;
Second temperature detecting module, for detecting the temperature Tb of compressor after described air-conditioning system enters heating mode;
Timer;
Control module, for the difference △ T=Tb-T2 of the middle portion temperature T2 of the temperature Tb and described indoor heat exchanger that calculate described compressor, and judges when described air-conditioning system meets the condition entering defrosting mode whether △ T is greater than preset temperature threshold value, wherein,
If judge that △ T is less than or equal to described preset temperature threshold value, described control module is then by regulating the operational factor of described air-conditioning system to start timing with described timer after making described △ T be greater than described preset temperature threshold value, and control described air-conditioning system when timing time is greater than Preset Time and enter described defrosting mode, to guarantee refrigerant circulation when described air-conditioning system defrosts.
7. the control device of air-conditioning system as claimed in claim 6, it is characterized in that, if judge that △ T is greater than described preset temperature threshold value, described timer then directly starts timing.
8. the control device of air-conditioning system as claimed in claim 6, it is characterized in that, described control module is especially by turning the aperture of throttle part down or heightening the running speed of compressor or the air-out volume heightening indoor fan or the air-out volume of heightening outdoor fan is greater than described preset temperature threshold value to make described △ T.
9. the control device of the air-conditioning system according to any one of claim 6-8, is characterized in that, the refrigerant in described air-conditioning system is carbon-hydrogen refrigerant HCs.
10. the control device of air-conditioning system as claimed in claim 6, it is characterized in that, the temperature Tb of described compressor is the bottom temp of described compressor or the side temperature of described compressor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106091235A (en) * | 2016-05-31 | 2016-11-09 | 广东美的暖通设备有限公司 | The control method of air conditioning system and air-conditioner control system |
| CN108361917A (en) * | 2018-02-14 | 2018-08-03 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
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| CN104110792A (en) * | 2014-05-30 | 2014-10-22 | 美的集团股份有限公司 | Control method and device for air conditioning system |
| CN104154630A (en) * | 2014-07-22 | 2014-11-19 | 美的集团武汉制冷设备有限公司 | Air conditioning system control method and control device |
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| CN106091235A (en) * | 2016-05-31 | 2016-11-09 | 广东美的暖通设备有限公司 | The control method of air conditioning system and air-conditioner control system |
| CN106091235B (en) * | 2016-05-31 | 2019-08-27 | 广东美的暖通设备有限公司 | The control method and air-conditioner control system of air-conditioning system |
| CN108361917A (en) * | 2018-02-14 | 2018-08-03 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
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