CN106765859A - The refrigerated dehumidification control method and air-conditioning system of air-conditioning - Google Patents
The refrigerated dehumidification control method and air-conditioning system of air-conditioning Download PDFInfo
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- CN106765859A CN106765859A CN201510823799.9A CN201510823799A CN106765859A CN 106765859 A CN106765859 A CN 106765859A CN 201510823799 A CN201510823799 A CN 201510823799A CN 106765859 A CN106765859 A CN 106765859A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000007791 dehumidification Methods 0.000 title claims abstract description 23
- 238000009833 condensation Methods 0.000 claims abstract description 82
- 230000005494 condensation Effects 0.000 claims description 27
- 230000002265 prevention Effects 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 19
- 238000005057 refrigeration Methods 0.000 claims description 13
- 239000003507 refrigerant Substances 0.000 claims description 10
- 238000013507 mapping Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 32
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
-
- 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
-
- 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
- F24F2110/20—Humidity
-
- 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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of refrigerated dehumidification control method of air-conditioning, including：In air-conditioning carries out refrigerated dehumidification running, when humidity is more than default humidity threshold, the variable quantity of the coil temperature of variable quantity and/or indoor heat exchanger according to indoor environment temperature, judges whether air-conditioning enters anti-condensation mode operation, and controls operation of air conditioner according to judged result.The invention also discloses a kind of air-conditioning system.The present invention can exactly judge whether air-conditioning needs to enter anti-condensation pattern, and then reduce operation of air conditioner cost.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an air conditioning system and a refrigeration and dehumidification control method of an air conditioner.
Background
In the process of refrigerating operation of the air conditioner, the air conditioner needs larger refrigerating capacity for cooling and maintaining load before the room temperature reaches the set temperature and when the room load is larger. If the operation is always kept at a high frequency, the temperature of the indoor coil pipe is too low, so that the temperature of the indoor coil pipe is always lower than the dew point temperature of air, the air conditioner is always in a refrigeration and dehumidification state, condensed water generated by dehumidification flows into the water receiving tank along the evaporator and is discharged outdoors, when the air humidity is high, a large amount of condensed water generated by dehumidification possibly overflows from the water receiving tank beyond the outdoor time of being discharged outdoors or directly blows out along an air duct along with air conditioner wind, and the water leakage or water blowing phenomenon of the air conditioner can be caused.
In the prior art, generally, a humidity sensor is arranged on an air conditioner to obtain the current indoor humidity, and after the current indoor humidity is greater than a set value, corresponding condensation prevention control is performed, but the scheme still cannot accurately prevent the time of condensation control in actual use, so that the operating cost of the air conditioner is increased.
Disclosure of Invention
The invention mainly aims to provide a refrigeration and dehumidification control method of an air conditioner and an air conditioning system, and aims to accurately judge whether anti-condensation control is performed or not and reduce the running cost of the air conditioner.
In order to achieve the above object, the present invention provides a refrigeration and dehumidification control method for an air conditioner, comprising the following steps:
s1, acquiring initial indoor environment temperature T when the air conditioner is started10；
S2, air conditioner operationAcquiring initial coil temperature T of the indoor heat exchanger within preset time21；
S3, acquiring the current indoor humidity;
s4, when the indoor current humidity is larger than the preset humidity threshold value, acquiring that the indoor environment temperature is relative to the initial indoor environment temperature T when the air conditioner operates for the second preset time10And/or obtaining the coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21The amount of change in (c);
s5, obtaining the indoor environment temperature relative to the initial indoor environment temperature T10And/or the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21Judging whether the air conditioner enters an anti-condensation mode or not;
and S6, controlling the air conditioner to operate according to the judgment result.
Preferably, the cooling and dehumidifying control method of the air conditioner further includes:
s7, when the air conditioner runs for the first preset time, the indoor environment temperature T is also acquired11；
The step S3 includes:
determining the indoor environment temperature T according to the mapping relation among the preset indoor environment temperature, the coil temperature of the indoor heat exchanger and the indoor humidity11And coil temperature T of indoor heat exchanger21The corresponding current indoor humidity.
Preferably, in the step S5, the indoor environment temperature is obtained according to the relative initial indoor environment temperature T10And the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21The step of judging whether the air conditioner enters the anti-condensation mode comprises the following steps:
when the air conditioner is runningThe indoor environment temperature is relative to the initial indoor environment temperature T in the second preset time10When the variation is less than or equal to a first preset temperature threshold value, the coil temperature of the indoor heat exchanger is judged to be relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21Whether the variation amount of (a) is less than or equal to a second preset temperature threshold value;
when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the air conditioner is judged to enter the condensation prevention mode.
Preferably, in the step S5, the indoor environment temperature is obtained according to the relative initial indoor environment temperature T10And the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21The step of judging whether the air conditioner enters the anti-condensation mode comprises the following steps:
when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the indoor environment temperature is judged to be relative to the initial indoor environment temperature T within a second preset time of air conditioner operation10Whether the variation amount of (a) is less than or equal to a first preset temperature threshold value;
when the air conditioner operates for a second preset time, the indoor environment temperature is opposite to the initial indoor environment temperature T10When the variation is less than or equal to a first preset temperature threshold value, the air conditioner is judged to enter an anti-condensation mode.
Preferably, the step of controlling the operation of the air conditioner according to the judgment result further includes:
and when the air conditioner enters the anti-condensation mode and operates for a third preset time, exiting the anti-condensation mode and returning to the step S2.
In addition, in order to achieve the above object, the present invention further provides an air conditioning system, which includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a fan, and a refrigerant loop formed by connecting the compressor, the indoor heat exchanger, and the outdoor heat exchanger in series, and the air conditioning system further includes a first temperature sensor, a second temperature sensor, and a controller; wherein,
the first temperature sensor is used for the initial indoor environment temperature T when the air conditioner is started10Acquiring the indoor environment temperature when the air conditioner operates for the second preset time;
the second temperature sensor is used for acquiring the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a first preset time21；
The controller is configured to: acquiring the current indoor humidity; when the indoor current humidity is larger than a preset humidity threshold value, the indoor environment temperature is obtained when the air conditioner operates for the second preset time, and the initial indoor environment temperature T is obtained10And/or obtaining the coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21The amount of change in (c); according to the obtained indoor environment temperature relative to the initial indoor environment temperature T10And/or the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21Judging whether the air conditioner enters an anti-condensation mode or not; and controlling the air conditioner to operate according to the judgment result.
Preferably, the first temperature sensor is further configured to: when the air conditioner operates for the first preset time, the indoor environment temperature T is also acquired11；
The controller is further configured to: determining the indoor environment temperature T according to the mapping relation among the preset indoor environment temperature, the coil temperature of the indoor heat exchanger and the indoor humidity11And coil temperature T of indoor heat exchanger21The corresponding current indoor humidity.
Preferably, the controller is configured to: when the air conditioner operates for a second preset timeThe temperature is relative to the initial indoor environment temperature T10When the variation is less than or equal to a first preset temperature threshold value, the coil temperature of the indoor heat exchanger is judged to be relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21Whether the variation amount of (a) is less than or equal to a second preset temperature threshold value;
when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the air conditioner is judged to enter the condensation prevention mode.
Preferably, the controller is configured to: when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the indoor environment temperature is judged to be relative to the initial indoor environment temperature T within a second preset time of air conditioner operation10Whether the variation amount of (a) is less than or equal to a first preset temperature threshold value;
when the air conditioner operates for a second preset time, the indoor environment temperature is opposite to the initial indoor environment temperature T10When the variation is less than or equal to a first preset temperature threshold value, the air conditioner is judged to enter an anti-condensation mode.
Preferably, the controller is further configured to: and when the air conditioner enters the anti-condensation mode and operates for a third preset time, exiting the anti-condensation mode, and judging the anti-condensation mode again.
According to the embodiment of the invention, in the process of refrigerating and dehumidifying the air conditioner, when the humidity is greater than the preset humidity threshold value, whether the air conditioner enters into the condensation prevention mode to operate is judged according to the variation of the indoor environment temperature and/or the variation of the coil temperature of the indoor heat exchanger. Compared with the prior art, the embodiment of the invention judges according to the humidity and also judges by combining the variation of the indoor environment temperature and/or the variation of the coil temperature of the indoor heat exchanger, thereby accurately judging whether the air conditioner needs to enter the anti-condensation mode, and further reducing the running cost of the air conditioner.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an air conditioning system according to the present invention;
FIG. 2 is a schematic flow chart illustrating a refrigeration and dehumidification control method according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a refrigeration and dehumidification control method according to a second embodiment of the air conditioner of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a refrigeration and dehumidification control method of an air conditioner, which is applied to an air conditioner system, and when the air conditioner system runs in a refrigeration process, whether the air conditioner enters an anti-condensation mode is judged according to humidity, and whether the air conditioner enters the anti-condensation mode is also judged by combining the variation of the indoor environment temperature and/or the variation of the coil temperature of an indoor heat exchanger, so that the opportunity of the air conditioner for anti-condensation control can be accurately judged, and the running cost of the air conditioner is further reduced.
The air conditioning system can be of various types, and can comprise an on-hook machine, a cabinet machine, a ceiling machine, a window machine, a mobile air conditioner and an embedded air conditioner according to the installation mode; according to the working principle, the device can comprise a frequency converter and a fixed frequency converter; the use environment may include a household air conditioner and a commercial air conditioner. The following air conditioning system will describe an air conditioner by taking an outdoor unit and an indoor unit which are separately provided as an example.
As shown in fig. 1, the air conditioning system may include an indoor unit 110, an outdoor unit 120, and a refrigerant circulation circuit formed by the indoor unit 110 and the outdoor unit 120. The indoor unit 110 may include an indoor heat exchanger 111 and an indoor fan 112; the outdoor unit 120 may include a compressor 121, an outdoor heat exchanger 122, an outdoor fan 123, a four-way valve 124, and the like. The refrigerant pipes of the indoor unit 110 and the outdoor unit 120 are further provided with a throttle valve 130. An air outlet of the compressor 121 is connected to a first interface of the four-way valve 124, a second interface of the four-way valve 124 is connected to one end of the outdoor heat exchanger 122, the other end of the outdoor heat exchanger 122 is connected to one end of the indoor heat exchanger 111 through the throttle valve 130, and the other end of the indoor heat exchanger 111 is connected to a return air inlet of the compressor 121.
When the air conditioning system operates in a refrigeration mode, the compressor 121 compresses a refrigerant, then discharges a high-pressure steam refrigerant, and flows through the outdoor heat exchanger, and meanwhile outdoor air sucked by an outdoor fan flows through the outdoor heat exchanger to exchange heat for the high-pressure steam refrigerant in the outdoor heat exchanger, so that the high-pressure steam refrigerant is condensed into high-pressure liquid; the high-pressure liquid enters the indoor heat exchanger through the throttle valve and is evaporated at a corresponding low pressure to absorb ambient heat, and meanwhile, the indoor fan continuously sucks air into the indoor heat exchanger for heat exchange and sends the air which is cooled after heat exchange into the room. Therefore, the indoor air continuously and circularly flows to achieve the purpose of reducing the indoor temperature. It is to be understood that when the air conditioning system is operating in the cooling mode, the outdoor heat exchanger may also be referred to as a condenser and the indoor heat exchanger may also be referred to as an evaporator. The refrigerant circulation loop when the air conditioning system operates in the heating mode is just opposite to the refrigerant circulation loop when the air conditioning system operates in the cooling mode, and the outdoor heat exchanger can be called an evaporator, and the indoor heat exchanger can be called a condenser.
Therefore, the air conditioning system further includes: a first temperature sensor 140, a second temperature sensor 150, and a controller 160; the first temperature sensor 140 may be disposed at an air return inlet of the indoor unit of the air conditioner, and is configured to detect an indoor ambient temperature. It can also be arranged at other positions in the room, such as on the shell of the air conditioner indoor unit and on the remote controller of the air conditioner. Alternatively, other temperature sensing devices may be used for acquisition. The first part isA temperature sensor 140 will also obtain the first preset time t for the air conditioner to operate after being turned on1Time indoor ambient temperature T11. A second temperature sensor 150 may be disposed within the indoor heat exchanger for sensing a coil temperature of the indoor heat exchanger. Specifically, the method detects a first preset time t for running the air conditioner after the air conditioner is started1Coil temperature T of indoor heat exchanger21. It is understood that the second temperature sensor for detecting the coil temperature of the indoor heat exchanger may be provided in plurality, i.e., at different positions of the coil of the indoor heat exchanger, so as to accurately obtain the actual coil temperature of the indoor heat exchanger.
The controller 160 may preset a mapping relationship between the temperature difference and the current indoor humidity. Specifically, according to the temperature difference between the set indoor environment temperature and the coil temperature of the indoor heat exchanger, the air conditioner is controlled to operate under different working conditions, the indoor humidity is detected simultaneously, and the mapping relation between the temperature difference and the indoor humidity is formed based on a large amount of test data. In other embodiments, the current indoor humidity may also be detected by a humidity sensor provided on the indoor unit or a humidity sensor provided at another indoor location. If the humidity is obtained according to the humidity sensor, the first temperature sensor 140 may not need to obtain the first preset time t for the air conditioner to operate after being turned on1Time indoor ambient temperature T11。
The controller 160 is further configured to:
when the indoor current humidity is larger than the preset humidity threshold value, the indoor environment temperature T relative to the initial indoor environment temperature T when the air conditioner operates for the second preset time is obtained10And/or obtaining the coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21The amount of change in (c);
according to the obtained indoor environment temperature relative to the initial indoor environment temperature T10And/or the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21Judging whether the air conditioner enters an anti-condensation mode or not; root of herbaceous plantAnd controlling the air conditioner to operate according to the judgment result.
Specifically, in the embodiment of the present invention, a humidity threshold is preset. The setting of the humidity threshold is based on the judgment of whether the anti-condensation treatment is needed. The value range of the humidity threshold is 50-100%, and the preferred value range is 70%. When the humidity is higher than 70%, the indoor humidity is too high, and a large amount of condensed water is generated during the dehumidification operation of the air conditioner, so that the condensed water overflows the water receiving tank or is blown out along the air duct along with the air conditioner air. It can be understood that the humidity threshold may also be flexibly set according to the actual usage scenario of the air conditioner, for example, when the air conditioner is used for dehumidification operation, if the humidity exceeds 60%, condensed water is generated, so the humidity threshold may be adjusted to 60%.
When the current humidity is less than or equal to the preset humidity threshold, the controller 160 determines whether to enter the anti-condensation mode according to the variation of the indoor ambient temperature and/or the variation of the coil temperature of the indoor heat exchanger. That is, when the air conditioner is operated for the second preset time, the indoor ambient temperature T is detected by the first temperature sensor 14012The coil temperature T of the indoor heat exchanger is detected by the second temperature sensor 15022. In this embodiment, the variable quantity of the indoor ambient temperature and the variable quantity of the coil temperature of the indoor heat exchanger are combined together to determine whether the condensation prevention mode needs to be entered. It can be understood that the judgment of the variation of the indoor environment temperature and the variation of the coil temperature of the indoor heat exchanger are not in sequence, namely, the judgment can be carried out according to the variation of the indoor environment temperature, and then the judgment can be carried out according to the variation of the coil temperature of the indoor heat exchanger; or, the temperature of the coil pipe of the indoor heat exchanger is judged according to the variation of the temperature of the coil pipe, and then the indoor environment temperature is judged according to the variation of the indoor environment temperature.
In another embodiment, when the current humidity is less than or equal to the preset humidity threshold, the judgment may be performed only according to the variation of the indoor ambient temperature, or may be performed only according to the variation of the coil temperature of the indoor heat exchanger.
The second preset time t2The setting of (2) is based on the time that the air conditioner normally operates to be basically stable. In the embodiment of the invention, the second preset time t2The value of (a) is 20-60 min, preferably 30 min.
The controller 160 is further configured to: according to the indoor ambient temperature T detected by the first temperature sensor 140 when the air conditioner is turned on10And air-conditioning operation t1+t2Time-detected indoor ambient temperature T12And calculating the indoor environment temperature relative to the initial indoor environment temperature T when the air conditioner operates for a second preset time10I.e. obtaining the temperature difference Δ T between them2. In addition, in the embodiment of the present invention, a first temperature threshold is preset, and the setting of the first temperature threshold is based on whether the anti-condensation process is required. The value range of the first temperature threshold is 2-10 ℃, and preferably 3 ℃. I.e. when air conditioning cooling dehumidifying operation t1+t2When the temperature of the indoor environment is reduced by at least 3 ℃ (temperature difference Delta T)2More than 3 ℃), or the current operation condition is considered to be abnormal, for example, the current indoor humidity is high due to the fact that the current indoor humidity is not relatively closed space (windows are opened and the like), and a large amount of condensed water is generated during the dehumidification operation of the air conditioner, so that the condensed water overflows a water receiving tank or is blown out along an air duct along with air conditioner air. Therefore, during the air-conditioning cooling and dehumidifying operation t1+t2When the temperature of the indoor environment is decreased by less than or equal to 3 deg.C (i.e. the temperature difference DeltaT)2And the temperature is less than or equal to 3 ℃), and controlling the air conditioner to enter the anti-condensation mode to operate.
The controller 160 is further configured to: when the temperature difference Delta T is judged2And when the temperature is smaller than or equal to the first preset temperature threshold, whether the condensation preventing mode is needed to be entered according to the variation of the coil temperature of the indoor heat exchanger. Specifically, in the embodiment of the present invention, the coil temperature T of the indoor heat exchanger detected by the second temperature sensor 150 when the air conditioner is turned on is used as a basis21And air-conditioning operation t1+t2Detected coil temperature T of indoor heat exchanger22Calculating the coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21Of (2) aConversion, i.e. obtaining the temperature difference Delta T between the two3. In addition, in the embodiment of the present invention, a second temperature threshold is preset, and the setting of the second temperature threshold is based on whether the anti-condensation process is required. The second temperature threshold may be a default value, for example, the second temperature threshold has a value ranging from 0 ℃ to 30 ℃; the value of the second temperature threshold value can also be set to a corresponding value according to the influence of the indoor environment temperature and the humidity. Specifically, the second temperature threshold is calculated according to the following formula:
【(T11-T12)+(Φ-70％)*10】；
in the above formula, T11For air-conditioning on and running time t1The indoor ambient temperature, T, detected by the first temperature sensor 14012Air conditioning running time (t)1+t2) The indoor ambient temperature detected by the first temperature sensor 140, phi, is the air conditioner operation time t1The determined current humidity in the room.
It is understood that the above formula represents that the second temperature threshold has a corresponding relationship with the variation of the indoor ambient temperature and the current indoor humidity. Therefore, in other embodiments, a data table may also be formed directly according to the corresponding relationship, and when the variation of the indoor ambient temperature and the indoor current humidity are obtained, the data table may be searched to obtain the corresponding second temperature threshold.
When the temperature difference is delta T based on the determined second temperature threshold3When the temperature is less than or equal to the second temperature threshold, the current operation condition is considered to be abnormal, for example, the current indoor humidity is larger because of not being a relatively closed space (opening a window and the like), and a large amount of condensed water is generated during the dehumidification operation of the air conditioner, so that the condensed water overflows the water receiving tank or is blown out along the air duct along with the air conditioner air. Therefore, during the air-conditioning cooling and dehumidifying operation t1+t2And when the temperature of the coil pipe of the indoor heat exchanger is reduced by less than or equal to a second temperature threshold value, controlling the air conditioner to enter the condensation prevention mode to operate.
The air conditioner is controlled to enter the condensation prevention mode, namely, all components of the air conditioner are controlled to operate in corresponding states so as to prevent a large amount of condensed water from being generated due to high humidity and overflowing the water receiving tank or being blown out along the air duct along with air conditioner wind. Specifically, in the anti-condensation mode, the operation parameters of the air conditioner can be adjusted in many ways, such as reducing the frequency of the compressor or increasing the wind speed of the fan, or reducing the frequency of the compressor and increasing the wind speed of the fan at the same time.
According to the embodiment of the invention, in the process of refrigerating and dehumidifying the air conditioner, when the humidity is greater than the preset humidity threshold value, whether the air conditioner enters into the condensation prevention mode to operate is judged according to the variation of the indoor environment temperature and/or the variation of the coil temperature of the indoor heat exchanger. Compared with the prior art, the embodiment of the invention judges according to the humidity and also judges by combining the variation of the indoor environment temperature and/or the variation of the coil temperature of the indoor heat exchanger, thereby accurately judging whether the air conditioner needs to enter the anti-condensation mode, and further reducing the running cost of the air conditioner.
After the air conditioner enters the anti-condensation mode, the controller 160 may control the air conditioner to keep the anti-condensation mode until the air conditioner is turned off. Of course, after the air conditioner enters the anti-condensation mode, the controller 160 may also periodically obtain the current indoor humidity, for example, the current indoor humidity is determined according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger or is obtained according to the humidity sensor, and when the current indoor humidity is less than or equal to the preset humidity threshold, the air conditioner is controlled to exit the anti-condensation mode, and enter the normal cooling mode to operate. In addition, the controller 160 may determine whether the air conditioner enters the condensation prevention mode again when the air conditioner enters the condensation prevention mode and operates for a third preset time. The third preset time is set according to that no condensed water overflows through the test. In the embodiment of the invention, the third preset time is 30-60 min, preferably 30 min.
In the embodiment of the invention, by circularly executing the condensation prevention mode, the generation of condensation can be prevented, and the relative comfort of a user can be ensured.
Further, in order to avoid the above cycle execution of the anti-condensation mode, the embodiment of the present invention may further set an accumulated number threshold, that is, when the cycle number reaches the accumulated number threshold, the air conditioner is controlled to shut down, or the air conditioner is controlled not to perform the judgment on whether to enter the anti-condensation mode, so as to maintain the normal operation state. The control method is set according to actual conditions, and is not limited herein.
Correspondingly, the invention further correspondingly provides a refrigeration and dehumidification control method of the air conditioner. As shown in fig. 2, the method for controlling the electric quantity of the air conditioner includes the following steps:
step S101, obtaining indoor environment temperature T when the air conditioner is started10；
In this embodiment, the indoor ambient temperature is detected by the first temperature sensor disposed at the air return opening of the indoor unit of the air conditioner. Of course, the first temperature sensor may be disposed at other locations in the room, such as on the air conditioner indoor unit housing, the air conditioner remote controller. Alternatively, other temperature sensing devices may be used for acquisition.
Step S102, operating the air conditioner for a first preset time t1In time, the indoor ambient temperature T is obtained11And coil temperature T of indoor heat exchanger21；
The air conditioner runs for a first preset time t after being started1Then, the indoor ambient temperature T is obtained again through the first temperature sensor11. Meanwhile, in the embodiment, the temperature T of the coil pipe of the indoor heat exchanger is detected by the second temperature sensor arranged in the indoor heat exchanger21. It is understood that the second temperature sensor for detecting the coil temperature of the indoor heat exchanger may be provided in plurality, i.e., at different positions of the coil of the indoor heat exchanger, so as to accurately obtain the actual coil temperature of the indoor heat exchanger.
The first preset time t1The setting of (2) is based on the stable operation of the air conditioner. Namely, the air conditioner operates for the first preset time t1Then, the operation is achievedAnd (4) a stable state. In this embodiment, the first predetermined time t1The value range of (1) is 8-15 min, preferably 10 min.
Step S103, calculating and obtaining the indoor environment temperature T11And coil temperature T of indoor heat exchanger21Temperature difference DeltaT of1；
Step S104, according to the temperature difference delta T1Determining the current indoor humidity phi;
in the embodiment of the invention, the indoor environment temperature and T11And coil temperature T of indoor heat exchanger21The closer the current humidity is, the higher the current indoor humidity is; otherwise, the lower the current humidity in the room. Therefore, in the embodiment of the invention, the mapping relation between the temperature difference and the current indoor humidity is preset. Specifically, according to the temperature difference between the set indoor environment temperature and the coil temperature of the indoor heat exchanger, the air conditioner is controlled to operate under different working conditions, the indoor humidity is detected simultaneously, and the mapping relation between the temperature difference and the indoor humidity is formed based on a large amount of test data. In other embodiments, the current indoor humidity may also be detected by a humidity sensor provided on the indoor unit or a humidity sensor provided at another indoor location.
Step S105, judging whether the current humidity is less than or equal to a preset humidity threshold value; if yes, the step S110 is carried out, otherwise, the step S106 is carried out;
in the embodiment of the invention, a humidity threshold phi is preset0. The setting of the humidity threshold is based on the judgment of whether the anti-condensation treatment is needed. The value range of the humidity threshold is 50-100%, and the preferred value range is 70%. When the humidity is higher than 70%, the indoor humidity is too high, and a large amount of condensed water is generated during the dehumidification operation of the air conditioner, so that the condensed water overflows the water receiving tank or is blown out along the air duct along with the air conditioner air. It can be understood that the humidity threshold may also be flexibly set according to the actual usage scenario of the air conditioner, for example, when the air conditioner is used for dehumidification operation, if the humidity exceeds 60%, condensed water is generated, so the humidity threshold may be adjusted to 60%.
Step S106, operating the air conditioner for a second preset time t2In time, the indoor ambient temperature T is obtained12And coil temperature T of indoor heat exchanger22；
When the current humidity is smaller than or equal to the preset humidity threshold value, whether the condensation preventing mode needs to be entered or not is judged according to the variation of the indoor environment temperature and/or the variation of the coil temperature of the indoor heat exchanger. That is, when the air conditioner operates for the second preset time, the indoor ambient temperature T is detected by the first temperature sensor12Detecting the coil temperature T of the indoor heat exchanger through a second temperature sensor22. In this embodiment, the variable quantity of the indoor ambient temperature and the variable quantity of the coil temperature of the indoor heat exchanger are combined together to determine whether the condensation prevention mode needs to be entered. It can be understood that the judgment of the variation of the indoor environment temperature and the variation of the coil temperature of the indoor heat exchanger are not in sequence, namely, the judgment can be carried out according to the variation of the indoor environment temperature, and then the judgment can be carried out according to the variation of the coil temperature of the indoor heat exchanger; or, the temperature of the coil pipe of the indoor heat exchanger is judged according to the variation of the temperature of the coil pipe, and then the indoor environment temperature is judged according to the variation of the indoor environment temperature.
Of course, in other embodiments, when the current humidity is less than or equal to the preset humidity threshold, the determination may be performed only according to the variation of the indoor ambient temperature, or may be performed only according to the variation of the temperature of the coil of the indoor heat exchanger.
The second preset time t2The setting of (2) is based on the time that the air conditioner normally operates to be basically stable. In the embodiment of the invention, the second preset time t2The value of (a) is 20-60 min, preferably 30 min.
Step S107, calculating and obtaining the indoor environment temperature T10Temperature T of indoor environment12Temperature difference DeltaT of2；
According to the indoor environment temperature T detected by the first temperature sensor when the air conditioner is started10And air-conditioning operation t1+t2Time-detected indoor ambient temperature T12Calculating the indoor environment temperature relative to the initial indoor environment temperature T when the air conditioner operates for the second preset time10I.e. obtaining the temperature difference Δ T between them2。
Step S108, judging the temperature difference delta T2Whether it is greater than or equal to a first preset temperature threshold Tx(ii) a If yes, the step S110 is executed, otherwise, the step S109 is executed;
in the embodiment of the invention, a first temperature threshold is preset, and the setting of the first temperature threshold is based on the judgment of whether the anti-condensation treatment is required. The value range of the first temperature threshold is 2-10 ℃, and preferably 3 ℃. I.e. when air conditioning cooling dehumidifying operation t1+t2When the temperature of the indoor environment is reduced by at least 3 ℃ (namely the temperature difference delta T)2And when the temperature is higher than or equal to 3 ℃), otherwise, the current operation working condition is considered to be abnormal, for example, the current indoor humidity is higher due to the fact that the current indoor humidity is not a relatively closed space (windows are opened, and the like), and a large amount of condensed water is generated during the dehumidification operation of the air conditioner, so that the condensed water overflows a water receiving tank or is blown out along an air duct along with air conditioner air. Therefore, during the air-conditioning cooling and dehumidifying operation t1+t2When the temperature of the indoor environment is reduced by less than 3 ℃ (namely the temperature difference delta T)2And when the temperature is less than 3 ℃, controlling the air conditioner to enter into a condensation prevention mode for operation.
Step S109, calculating and obtaining coil temperature T of indoor heat exchanger21Temperature T of coil pipe22Temperature difference DeltaT of3；
When the temperature difference Delta T is judged2And when the temperature is smaller than or equal to the first preset temperature threshold, whether the condensation preventing mode is needed to be entered according to the variation of the coil temperature of the indoor heat exchanger. Specifically, in the embodiment of the present invention, the coil temperature T of the indoor heat exchanger detected by the second temperature sensor 150 when the air conditioner is turned on is used as a basis21And air-conditioning operation t1+t2Detected coil temperature T of indoor heat exchanger22Calculating the coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21I.e. obtaining the temperature difference Δ T between them3。
Step S100, judging temperature difference delta T3Whether it is greater than or equal to a second preset temperature threshold Ty(ii) a If yes, go to step S110; otherwise, the process proceeds to step S111.
In the embodiment of the invention, a second temperature threshold is preset, and the setting of the second temperature threshold is based on the judgment of whether the anti-condensation treatment is required. The second temperature threshold may be a default value, for example, the value range of the second temperature threshold is 0-3 ℃; the value of the second temperature threshold value can also be set to a corresponding value according to the influence of the indoor environment temperature and the humidity. Specifically, the second temperature threshold is calculated according to the following formula:
【(T11-T12)+(Φ-70％)*10】；
in the above formula, T11For air-conditioning on and running time t1Indoor ambient temperature, T, detected by the first temperature sensor12For the air-conditioning operation time (t)1+t2) The indoor environment temperature detected by the first temperature sensor, phi, is the air conditioner running time t1The determined current humidity in the room.
It is understood that the above formula represents that the second temperature threshold has a corresponding relationship with the variation of the indoor ambient temperature and the current indoor humidity. Therefore, in other embodiments, a data table may also be formed directly according to the corresponding relationship, and when the variation of the indoor ambient temperature and the indoor current humidity are obtained, the data table may be searched to obtain the corresponding second temperature threshold.
When the temperature difference is delta T based on the determined second temperature threshold3When the temperature is greater than or equal to the second temperature threshold, the current operation condition is considered to be abnormal, for example, the current indoor humidity is larger because the current indoor humidity is not relatively closed space (windows are opened and the like), and a large amount of condensed water is generated during the dehumidification operation of the air conditioner, so that the condensed water overflows a water receiving tank or is blown along an air duct along with air conditioner windAnd (6) discharging. Therefore, during the air-conditioning cooling and dehumidifying operation t1+t2And when the temperature of the coil pipe of the indoor heat exchanger is reduced by less than a second temperature threshold value, controlling the air conditioner to enter the condensation prevention mode to operate.
Step S110, controlling the normal operation of the air conditioner;
and controlling the air conditioner to operate according to a normal mode, for example, controlling the air conditioner to operate according to the current operation mode and the operation parameters when the air conditioner currently operates in a cooling and dehumidifying mode.
And step S111, controlling the air conditioner to enter a condensation prevention mode.
The air conditioner is controlled to enter a condensation prevention mode, namely, all components of the air conditioner are controlled to operate in corresponding states so as to prevent a large amount of condensed water from being generated due to high humidity and overflowing a water receiving tank or being blown out along an air duct along with air conditioner wind. Specifically, in the anti-condensation mode, the operation parameters of the air conditioner can be adjusted in many ways, such as reducing the frequency of the compressor or increasing the wind speed of the fan, or reducing the frequency of the compressor and increasing the wind speed of the fan at the same time.
According to the embodiment of the invention, in the process of refrigerating and dehumidifying the air conditioner, when the humidity is greater than the preset humidity threshold value, whether the air conditioner enters into the condensation prevention mode to operate is judged according to the variation of the indoor environment temperature and/or the variation of the coil temperature of the indoor heat exchanger. Compared with the prior art, the embodiment of the invention judges according to the humidity and also judges by combining the variation of the indoor environment temperature and/or the variation of the coil temperature of the indoor heat exchanger, thereby accurately judging whether the air conditioner needs to enter the anti-condensation mode, and further reducing the running cost of the air conditioner.
After the air conditioner enters the anti-condensation mode, the air conditioner can keep running in the anti-condensation mode until the air conditioner is turned off. Certainly, after the air conditioner enters the anti-condensation mode, the current indoor humidity can also be periodically acquired, for example, the current indoor humidity is determined according to the indoor environment temperature and the coil temperature of the indoor heat exchanger or acquired according to a humidity sensor, and when the current indoor humidity is smaller than or equal to a preset humidity threshold value, the air conditioner is controlled to exit the anti-condensation mode and enter the normal refrigeration mode to operate. In addition, when the air conditioner enters the anti-condensation mode and operates for the third preset time, the operation returns to the step S102. As shown in fig. 3, based on the embodiment of the cooling and dehumidifying control method of the air conditioner, the cooling and dehumidifying control method of the air conditioner of the present embodiment further includes, after step S111:
and S112, when the air conditioner is controlled to run for the third preset time, the air conditioner exits from the condensation preventing mode, and the process goes to the step S102.
The third preset time is set according to that no condensed water overflows through the test. In the embodiment of the invention, the third preset time is 30-60 min, preferably 30 min.
In the embodiment of the invention, by circularly executing the condensation prevention mode, the generation of condensation can be prevented, and the relative comfort of a user can be ensured.
Further, in order to avoid the above cycle execution of the anti-condensation mode, the embodiment of the present invention may further set an accumulated number threshold, that is, when the cycle number reaches the accumulated number threshold, the air conditioner is controlled to shut down, or the air conditioner is controlled not to perform the judgment on whether to enter the anti-condensation mode, so as to maintain the normal operation state. The control method is set according to actual conditions, and is not limited herein.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A refrigeration and dehumidification control method of an air conditioner is characterized by comprising the following steps:
s1, acquiring initial indoor environment temperature T when the air conditioner is started10；
S2, when the air conditioner runs for the first preset time, acquiring the initial coil temperature T of the indoor heat exchanger21；
S3, acquiring the current indoor humidity;
s4, when the current indoor humidity is larger than the preset humidity threshold value, acquiring the second air conditioner operationThe indoor environment temperature is relative to the initial indoor environment temperature T in the preset time10And/or obtaining the coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21The amount of change in (c);
s5, obtaining the indoor environment temperature relative to the initial indoor environment temperature T10And/or the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21Judging whether the air conditioner enters an anti-condensation mode or not;
and S6, controlling the air conditioner to operate according to the judgment result.
2. The cooling and dehumidifying control method of an air conditioner as claimed in claim 1, wherein the cooling and dehumidifying control method of an air conditioner further comprises:
s7, when the air conditioner runs for the first preset time, the indoor environment temperature T is also acquired11；
The step S3 includes:
determining the indoor environment temperature T according to the mapping relation among the preset indoor environment temperature, the coil temperature of the indoor heat exchanger and the indoor humidity11And coil temperature T of indoor heat exchanger21The corresponding current indoor humidity.
3. A cooling and dehumidifying control method of an air conditioner as claimed in claim 1, wherein in step S5, the indoor temperature is compared with the initial indoor temperature T according to the obtained indoor temperature10And the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21The step of judging whether the air conditioner enters the anti-condensation mode comprises the following steps:
when the air conditioner operates for a second preset time, the indoor environment temperature is opposite to the initial indoor environment temperature T10When the variation is less than or equal to a first preset temperature threshold value, the temperature of the coil pipe of the indoor heat exchanger is judged to be relative to the temperature of the coil pipe of the indoor heat exchanger when the air conditioner operates for a second preset timeInitial coil temperature T of indoor heat exchanger21Whether the variation amount of (a) is less than or equal to a second preset temperature threshold value;
when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the air conditioner is judged to enter the condensation prevention mode.
4. A cooling and dehumidifying control method of an air conditioner as claimed in claim 1, wherein in step S5, the indoor temperature is compared with the initial indoor temperature T according to the obtained indoor temperature10And the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21The step of judging whether the air conditioner enters the anti-condensation mode comprises the following steps:
when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the indoor environment temperature is judged to be relative to the initial indoor environment temperature T within a second preset time of air conditioner operation10Whether the variation amount of (a) is less than or equal to a first preset temperature threshold value;
when the air conditioner operates for a second preset time, the indoor environment temperature is opposite to the initial indoor environment temperature T10When the variation is less than or equal to a first preset temperature threshold value, the air conditioner is judged to enter an anti-condensation mode.
5. A cooling and dehumidifying control method of an air conditioner as claimed in any one of claims 1 to 4 wherein the step of controlling the operation of the air conditioner according to the judgment result further includes:
and when the air conditioner enters the anti-condensation mode and operates for a third preset time, exiting the anti-condensation mode and returning to the step S2.
6. An air conditioning system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a fan and a refrigerant loop formed by connecting the compressor, the indoor heat exchanger and the outdoor heat exchanger in series, and is characterized by also comprising a first temperature sensor, a second temperature sensor and a controller; wherein,
the first temperature sensor is used for the initial indoor environment temperature T when the air conditioner is started10Acquiring the indoor environment temperature when the air conditioner operates for the second preset time;
the second temperature sensor is used for acquiring the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a first preset time21；
The controller is configured to: acquiring the current indoor humidity; when the indoor current humidity is larger than a preset humidity threshold value, the indoor environment temperature is obtained when the air conditioner operates for the second preset time, and the initial indoor environment temperature T is obtained10And/or obtaining the coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21The amount of change in (c); according to the obtained indoor environment temperature relative to the initial indoor environment temperature T10And/or the obtained coil temperature of the indoor heat exchanger relative to the initial coil temperature T of the indoor heat exchanger21Judging whether the air conditioner enters an anti-condensation mode or not; and controlling the air conditioner to operate according to the judgment result.
7. The air conditioning system as claimed in claim 6, wherein said first temperature sensor is further configured to: when the air conditioner operates for the first preset time, the indoor environment temperature T is also acquired11；
The controller is further configured to: determining the indoor environment temperature T according to the mapping relation among the preset indoor environment temperature, the coil temperature of the indoor heat exchanger and the indoor humidity11And coil temperature T of indoor heat exchanger21The corresponding current indoor humidity.
8. The air conditioning system as set forth in claim 6, wherein said controller is configured to: when the air conditioner operates for a second preset timeThe indoor ambient temperature is relative to the initial indoor ambient temperature T10When the variation is less than or equal to a first preset temperature threshold value, the coil temperature of the indoor heat exchanger is judged to be relative to the initial coil temperature T of the indoor heat exchanger when the air conditioner operates for a second preset time21Whether the variation amount of (a) is less than or equal to a second preset temperature threshold value;
when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the air conditioner is judged to enter the condensation prevention mode.
9. The air conditioning system as set forth in claim 6, wherein said controller is configured to: when the air conditioner runs for a second preset time, the coil temperature of the indoor heat exchanger is relative to the initial coil temperature T of the indoor heat exchanger21When the variation is less than or equal to a second preset temperature threshold value, the indoor environment temperature is judged to be relative to the initial indoor environment temperature T within a second preset time of air conditioner operation10Whether the variation amount of (a) is less than or equal to a first preset temperature threshold value;
when the air conditioner operates for a second preset time, the indoor environment temperature is opposite to the initial indoor environment temperature T10When the variation is less than or equal to a first preset temperature threshold value, the air conditioner is judged to enter an anti-condensation mode.
10. The air conditioning system as claimed in any one of claims 6-8, wherein the controller is further configured to: and when the air conditioner enters the anti-condensation mode and operates for a third preset time, exiting the anti-condensation mode, and judging the anti-condensation mode again.
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| CN113864987A (en) * | 2021-10-26 | 2021-12-31 | 美的集团武汉暖通设备有限公司 | Anti-condensation control method and operation control device of air conditioner and air conditioner |
| CN114543310A (en) * | 2022-01-29 | 2022-05-27 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner, air conditioner and storage medium |
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Application publication date: 20170531 |