CN104406251A - Dehumidification method for air conditioner and air conditioner - Google Patents
Dehumidification method for air conditioner and air conditioner Download PDFInfo
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- CN104406251A CN104406251A CN201410649689.0A CN201410649689A CN104406251A CN 104406251 A CN104406251 A CN 104406251A CN 201410649689 A CN201410649689 A CN 201410649689A CN 104406251 A CN104406251 A CN 104406251A
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000007613 environmental effect Effects 0.000 abstract 3
- 238000013459 approach Methods 0.000 description 10
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000013507 mapping Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
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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)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a dehumidification method for an air conditioner. The dehumidification method comprises the following steps of acquiring indoor environmental temperature T1 and the indoor heat exchanger tube temperature T2 of the air conditioner when a dehumidification instruction is sensed; acquiring instantaneous dew point temperature Td corresponding to the indoor environmental temperature T1; calculating a temperature difference DeltaT1 between the indoor environmental temperature T1 and indoor target temperature Ts set by a user and a temperature difference DeltaT2 between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T2; controlling the running of the air conditioner according to the temperature differences DeltaT1 and DeltaT2 in a way that the temperature difference DeltaT1 is within a preset temperature difference range and the temperature difference DeltaT2 is more than or equal to a first preset temperature difference threshold value. The invention also discloses the air conditioner. According to the dehumidification method and the air conditioner, room temperature can be effectively controlled in a dehumidification process, and air is also effectively dehumidified.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner dehumidification method and an air conditioner.
Background
Air conditioners have become a necessity for people's homes, and particularly, when the outdoor temperature is high or low, the indoor temperature can be kept at a comfortable temperature through the air conditioners. In the existing air conditioner, although the dehumidification function is a basic function, the temperature is not controllable during dehumidification, so that the room temperature is too low after dehumidification for a period of time. Or, the control system of the air conditioner is made very complicated to realize constant temperature dehumidification. However, it is also costly and may also sacrifice cooling/heating performance.
Therefore, there is a need for a dehumidification method for an air conditioner, which can not only realize temperature control during dehumidification, but also does not affect the original cooling/heating performance of the air conditioner.
Disclosure of Invention
The invention mainly aims to provide an air conditioner and a dehumidification method thereof, aiming at realizing effective dehumidification.
In order to achieve the above object, the present invention provides a dehumidification method of an air conditioner, comprising the steps of:
when a dehumidification instruction is detected, acquiring an indoor environment temperature T1 and an indoor heat exchanger tube temperature T2 of the air conditioner;
acquiring an instantaneous dew point temperature Td corresponding to the indoor environment T1;
calculating the temperature difference Delta T between the indoor environment temperature T1 and the indoor target temperature Ts set by the user1And instantDelta T temperature difference between time dew point Td and indoor heat exchanger tube temperature T22；
According to said temperature difference DeltaT1And the temperature difference DeltaT2Controlling the operation of the air conditioner to make the temperature difference delta T1Within a preset temperature difference range, and the temperature difference delta T2Greater than or equal to a preset first temperature difference threshold value.
Preferably, said difference in temperature Δ T is a function of2Controlling the operation of the air conditioner to make the temperature difference delta T2The temperature difference threshold value greater than or equal to the preset temperature difference threshold value comprises:
the temperature difference is measured by delta T2Comparing with a first temperature difference threshold;
when the temperature difference DeltaT2And when the temperature difference is smaller than the first temperature difference threshold value, the exhaust temperature of the compressor of the air conditioner is increased and/or the wind speed of the fan is reduced until the temperature difference is larger than or equal to the first temperature difference threshold value, or the exhaust temperature of the compressor of the air conditioner is increased to preset the temperature threshold value, and the wind speed of the fan is reduced to the lowest wind speed set by the air conditioner.
Preferably, the increment of the exhaust temperature of the compressor of the air conditioner at each time is in a value range of [1 ℃, 10 ℃; the decrement of the wind speed of the fan of the air conditioner is within the value range of 1 percent and 20 percent every time.
Preferably, said difference in temperature Δ T is a function of1Controlling the operation of the air conditioner to make the temperature difference delta T1The temperature difference range comprises:
when the temperature difference DeltaT1When < -Y, reducing the compressor frequency of the air conditioner;
when the temperature difference DeltaT1When the pressure is higher than + Y, increasing the frequency of the compressor of the air conditioner;
when-Y is less than or equal to temperature difference delta T1When the frequency is less than or equal to + Y, keeping the frequency of the compressor of the air conditioner unchanged or allowing the frequency of the compressor of the air conditioner to float in a preset range;
wherein [ -Y, + Y ] is a preset temperature difference range.
Preferably, the acquiring the instantaneous dew point temperature Td corresponding to the indoor ambient temperature T1 includes:
calculating to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 according to the indoor environment temperature T1 and a preset calculation rule; or,
and inquiring a preset dew point temperature table according to the indoor environment temperature T1 to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1.
In addition, to achieve the above object, the present invention also provides an air conditioner including a dehumidification control apparatus, wherein the dehumidification control apparatus includes:
the first temperature acquisition module is used for acquiring the indoor environment temperature T1 and the indoor heat exchanger tube temperature T2 of the air conditioner when a dehumidification instruction is detected;
a second temperature acquisition module for acquiring an instantaneous dew point temperature Td corresponding to the indoor environment T1;
a temperature difference calculation module for calculating the temperature difference Delta T between the indoor environment temperature T1 and the indoor target temperature Ts set by the user1And the temperature difference DeltaT between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T22；
A control module for determining the temperature difference Δ T1And the temperature difference DeltaT2Controlling the operation of the air conditioner to make the temperature difference delta T1Within a preset temperature difference range, and the temperature difference delta T2Greater than or equal to a preset first temperature difference threshold value.
Preferably, the control module comprises:
a dehumidification control unit for converting the temperature difference Delta T2Comparing with a first temperature difference threshold; when the temperature difference DeltaT2Less than the first temperature differenceAt threshold value, increasing the exhaust temperature of the compressor of the air conditioner and/or reducing the wind speed of the fan until the temperature difference delta T2And the air speed of the fan is reduced to the lowest air speed set by the air conditioner.
Preferably, in the dehumidification control unit, the increment of the exhaust temperature of the compressor of the air conditioner at each time is in a value range of [1 ℃, 10 ℃; the decrement of the wind speed of the fan of the air conditioner is within the value range of 1 percent and 20 percent every time.
Preferably, the control module comprises:
a temperature control unit for: when the temperature difference DeltaT1When < -Y, reducing the compressor frequency of the air conditioner; when the temperature difference DeltaT1When the pressure is higher than + Y, increasing the frequency of the compressor of the air conditioner; when-Y is less than or equal to temperature difference delta T1When the frequency is less than or equal to + Y, keeping the frequency of the compressor of the air conditioner unchanged or allowing the frequency of the compressor of the air conditioner to float in a preset range; wherein [ -Y, + Y)]Is a preset temperature difference range.
Preferably, the second temperature obtaining module is configured to: calculating to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 according to the indoor environment temperature T1 and a preset calculation rule; or,
and inquiring a preset dew point temperature table according to the indoor environment temperature T1 to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1.
The invention obtains the temperature difference delta T between the indoor environment temperature T1 and the indoor target temperature Ts set by the user1And the temperature difference DeltaT between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T22Then according to the temperature difference DeltaT1And temperature difference Delta T2And the air conditioner is controlled to operate, so that not only is the room temperature effectively controlled in the dehumidification process, but also the effective dehumidification is realized.
Drawings
FIG. 1 is a schematic flow chart of a dehumidification method of an air conditioner according to the present invention;
FIG. 2 shows the temperature difference Δ T according to the dehumidification method of the air conditioner2Controlling the operation of the air conditioner to make the temperature difference delta T2A refinement flow schematic diagram of a temperature difference threshold value which is greater than or equal to a preset temperature difference threshold value;
FIG. 3 shows the temperature difference Δ T according to the dehumidification method of the air conditioner of the present invention1Controlling the operation of the air conditioner to make the temperature difference delta T1A refining flow schematic diagram within a preset temperature difference range;
FIG. 4 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 5 is a functional block diagram of a dehumidification control device of an air conditioner according to the present invention;
fig. 6 is a schematic diagram of a detailed functional block of the control module in fig. 5.
In order to make the technical solution of the present invention clearer and clearer, the following detailed description is made 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 core idea of the invention is as follows: when dehumidification is needed, the indoor environment temperature T1, the indoor heat exchanger tube temperature T2 and the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 are obtained, and then the operating parameters of the air conditioner are automatically adjusted according to the temperature T1, the temperature T2, the temperature Td and the temperature Ts, so that not only is the room temperature effectively controlled in the dehumidification process, but also effective dehumidification is realized.
Referring to fig. 1, a first embodiment of a dehumidifying method of an air conditioner according to the present invention is shown. The dehumidification method of the air conditioner in the embodiment can comprise the following steps:
step S110, when a dehumidification instruction is detected, acquiring an indoor environment temperature T1 and an indoor heat exchanger tube temperature T2 of the air conditioner;
in this embodiment, temperature sensors are disposed at the air return opening of the indoor unit and on the coil of the indoor heat exchanger to detect the indoor ambient temperature T1 and the indoor heat exchanger temperature T2. When a dehumidification command is detected, the indoor ambient temperature T1 and the indoor heat exchanger tube temperature T2 detected by the temperature sensor can be obtained.
Step S120, acquiring an instantaneous dew point temperature Td corresponding to the indoor environment T1;
the instantaneous dew point temperature Td corresponding to the indoor ambient temperature T1 is obtained, which may specifically be: in one example, a corresponding dew point temperature calculation rule is preset in the air conditioner, then a parameter required by the dew point temperature calculation rule, such as the indoor ambient temperature, is obtained, and finally the instantaneous dew point temperature Td corresponding to the indoor ambient temperature T1 is obtained by calculation according to the obtained parameter and the dew point temperature calculation rule. In another example, a dew point temperature table may be pre-stored in the air conditioner, and the dew point temperature table records a mapping relationship between the indoor environment temperature and the dew point temperature, so that when the indoor environment temperature T1 is obtained, the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 is obtained by table look-up according to the pre-stored dew point temperature table.
Step S130, calculating the temperature difference delta T between the indoor environment temperature T1 and the indoor target temperature Ts set by the user1And the temperature difference DeltaT between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T22；
Step S140, according to the temperature difference delta T1And the temperature difference DeltaT2Controlling the operation of the air conditioner to make the temperature difference delta T1Within a preset temperature difference range, and the temperature difference delta T2Greater than or equal to a preset first temperature difference threshold value.
Obtaining indoor ambient temperatureT1, the indoor heat exchanger tube temperature T2 and the instantaneous dew point temperature Td, then calculating the delta T1T1-Ts, and calculating Δ T2Td-T2. Where Ts is an indoor target temperature set by the user when controlling the air conditioner. Then, two temperature differences are obtained from the calculation, the operation of the air conditioner is controlled so that the indoor ambient temperature T1 of the air conditioner approaches the indoor target temperature Ts set by the user, and the temperature difference DeltaT of the air conditioner is controlled2Greater than or equal to a preset first temperature difference threshold value.
According to the embodiment of the invention, the temperature difference delta T between the indoor environment temperature T1 and the indoor target temperature Ts set by a user is obtained1And the temperature difference DeltaT between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T22Then according to the temperature difference DeltaT1And temperature difference Delta T2And the air conditioner is controlled to operate, so that not only is the room temperature effectively controlled in the dehumidification process, but also the effective dehumidification is realized.
Further, as shown in FIG. 2, the temperature difference Δ T is used in step S1402Controlling the operation of the air conditioner to make the temperature difference delta T2The first temperature difference threshold value greater than or equal to the preset value may include:
step S141, converting the temperature difference Delta T2Comparing with a first temperature difference threshold;
step S142, when the temperature difference delta T2When the temperature difference is smaller than the first temperature difference threshold value, the exhaust temperature of a compressor of the air conditioner is increased and/or the wind speed of a fan is reduced until the temperature difference delta T2And the air speed of the fan is reduced to the lowest air speed set by the air conditioner.
In this embodiment, the first temperature difference threshold is a preset value in the air conditioner, and the value range of the first temperature difference threshold is as follows: a is more than 0 ℃ and less than or equal to 10 ℃, wherein a is a first temperature difference threshold value. When temperature difference is delta T2If < a, it is necessary to dehumidify it. The method specifically comprises the following steps: increasing the pressure of the air conditionerThe exhaust temperature of the compressor is lowered and/or the wind speed of the fan is reduced, and the increment delta T of the exhaust temperature of the compressor of the air conditioner is carried out every timePThe value range is as follows: delta T at 1 deg.C or lessPThe temperature is less than or equal to 10 ℃, and the value range of X reduction of the wind speed of the fan of the air conditioner is more than or equal to 1% and less than or equal to 20%. Circulating in sequence until the temperature difference delta T2And the air speed of the fan is reduced to the lowest air speed set by the air conditioner. In this embodiment, the preset temperature threshold is 10 ℃. The exhaust temperature of the compressor is prevented from increasing all the time, and the safe operation of the compressor is ensured.
Further, as shown in FIG. 3, the temperature difference Δ T is used in step S1401Controlling the operation of the air conditioner to make the temperature difference delta T1The temperature difference within the preset temperature difference range may include:
step S143, comparing the temperature difference Delta T1Comparing to + Y and-Y;
step S144, when the temperature difference delta T1When < -Y, reducing the compressor frequency of the air conditioner;
step S145, when the temperature difference delta T1When the pressure is higher than + Y, increasing the frequency of the compressor of the air conditioner;
step S146, when-Y is less than or equal to temperature difference delta T1When the frequency is less than or equal to + Y, keeping the frequency of the compressor of the air conditioner unchanged or allowing the frequency of the compressor of the air conditioner to float in a preset range; wherein [ -Y, + Y)]Is a preset temperature difference range.
In this embodiment, Y is a preset value of the air conditioner, and the value range of Y may be 0 ℃ or more and 1 ℃ or less. When taking Y as 0.5 ℃ for example, when Delta T1When the temperature is less than minus 0.5 ℃, the current indoor environment temperature T1 is lower than the indoor target temperature Ts set by the user, and the air conditioner is controlled to increase the indoor environment temperature, namely, the frequency of a compressor of the air conditioner is reduced. When the temperature difference DeltaT1> +0.5, indicating that the current indoor ambient temperature T1 is higher than the user-set indoor target temperature Ts,the air conditioner is controlled to lower the indoor ambient temperature, i.e., to increase the compressor frequency of the air conditioner. When the temperature difference is less than or equal to-0.5, delta T1And when the temperature is less than or equal to +0.5, the current indoor environment temperature T1 basically tends to the indoor target temperature Ts set by the user and belongs to the reasonable temperature difference range controlled by the air conditioner, and at the moment, the frequency of the compressor of the air conditioner is kept unchanged or is allowed to float within the preset range.
The dehumidification control process of the dehumidification method of the air conditioner is described in detail below by way of an example. In this example, the air conditioner operates in a certain refrigeration environment, and the dehumidification function is turned on. In the above dehumidification method, Y is 0.5, and delta T is an increment of discharge temperature of a compressor of the air conditioner each timePIs 2 ℃. The cycle period for dehumidification control was 3 minutes.
Example 1
When the air conditioner is operated to dehumidify under a certain environment. At the beginning, the indoor ambient temperature T1 and the indoor heat exchanger tube temperature T2 are detected, then the instantaneous dew point temperature Td corresponding to the indoor ambient temperature T1 is obtained, and the temperature difference Δ T is calculated1T1-TS, and Δ T2Td-T2. Due to Delta T1> +0.5, therefore, the air conditioner is controlled to cool and dehumidify, the air conditioner will control the running frequency of the compressor according to the normal refrigeration condition, so that the indoor environment temperature T1 gradually approaches the indoor target temperature TS, meanwhile, if DeltaT is in the process2If the temperature is not lower than a, the air conditioner does not do any additional action except that the running frequency of the compressor is controlled to enable the indoor environment temperature T1 to gradually approach the indoor target temperature TS; if Δ 2 < a, the air conditioner is controlled to raise the compressor discharge temperature by 2 ℃ (i.e., Tp1 ═ Tp +2), and the fan speed is reduced by X%. Detecting the indoor environment temperature T1 and the indoor heat exchanger tube temperature T2 for 1 time every 3 minutes, and circulating the steps in sequence until Tp is increased by 10 ℃ and the wind speed of a fan is reduced to the lowest wind set by the air conditioner, or delta T2A is more than or equal to a, namely, the effective dehumidification in the cooling process is realized.
After the air conditioner dehumidifies for a period of time, if delta T is less than or equal to minus 0.51When the temperature is less than or equal to +0.5, the air conditioner automatically switches to constant temperature dehumidification,i.e. the compressor operating frequency is kept constant, only the air conditioner is controlled to make deltaT2A is more than or equal to a, so that constant-temperature dehumidification is realized; in the process, if delta 2 is more than or equal to a, the air conditioner keeps the original running state; if delta 2 is less than a, controlling the air conditioner to raise the exhaust temperature of the compressor by 2 ℃ (namely Tp1 is equal to Tp +2), simultaneously reducing the wind speed of the fan by X%, detecting the indoor environment temperature T1 and the indoor heat exchanger pipe temperature T2 every 3 minutes, and sequentially and circularly operating the steps until Tp is raised by 10 ℃, and the wind speed of the fan is lowered to the lowest wind set by the air conditioner, or delta T2A is more than or equal to a, namely constant temperature and effective dehumidification are realized.
Example two
When the air conditioner operates for dehumidification in a certain environment, and the dehumidification is started, the indoor environment temperature T1 and the indoor heat exchanger tube temperature T2 are detected, then the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 is obtained, and the temperature difference delta T is calculated1T1-TS, and Δ T2Td-T2. Due to Delta T1> +0.5, therefore, the air conditioner is controlled to cool and dehumidify, the air conditioner controls the running frequency of the compressor according to the common refrigeration condition, so that the indoor environment temperature T1 gradually approaches the indoor target temperature TS, meanwhile, in the process, if delta 2 is more than or equal to a, the air conditioner does not do extra action except for controlling the running frequency of the compressor so that the indoor environment temperature T1 gradually approaches the indoor target temperature TS; if delta 2 is less than a, the air conditioner is controlled to raise the exhaust temperature of the compressor by 2 ℃ (namely Tp1 is Tp +2) or reduce the wind speed of the fan by X%, the indoor environment temperature T1 and the indoor heat exchanger pipe temperature T2 are detected for 1 time every 3 minutes, and the steps are circularly operated in sequence until Tp is raised by 10 ℃, the wind speed of the fan is reduced to the lowest wind set by the air conditioner, or delta T2A is more than or equal to a, namely, the effective dehumidification in the cooling process is realized.
After the air conditioner dehumidifies for a period of time, if delta T is less than or equal to minus 0.51Not more than +0.5, the air conditioner automatically switches to constant temperature dehumidification, namely the running frequency of the compressor is kept unchanged, and only the air conditioner is controlled to enable the delta T2Delta is more than or equal to a, so that constant-temperature dehumidification is realized; in the process, if delta 2 is more than or equal to a, the air conditioner keeps the original running state; if delta 2 is less than a, the air conditioner is controlled to raise pressureThe exhaust temperature of the compressor is 2 ℃ (Tp 1 ═ Tp +2) or the wind speed of the fan is reduced by X%, the indoor environment temperature T1 and the indoor heat exchanger pipe temperature T2 are detected for 1 time every 3 minutes, and the steps are circularly operated in sequence until Tp is raised by 10 ℃ and the wind speed of the fan is reduced to the lowest wind set by the air conditioner, or delta T2A is more than or equal to a, namely constant temperature and effective dehumidification are realized.
Example three
When the air conditioner operates for dehumidification in a certain environment, and the dehumidification is started, the indoor environment temperature T1 and the indoor heat exchanger tube temperature T2 are detected, then the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 is obtained, and the temperature difference delta T is calculated1T1-TS, and Δ T2Td-T2. Due to Delta T1> +0.5, therefore, the air conditioner is controlled to cool and dehumidify, the air conditioner controls the running frequency of the compressor according to the common refrigeration condition, so that the indoor environment temperature T1 gradually approaches the indoor target temperature TS, meanwhile, in the process, if delta 2 is more than or equal to a, the air conditioner does not do extra action except that the running frequency of the compressor is controlled, so that the indoor environment temperature T1 gradually approaches the indoor target temperature TS; if delta 2 is less than a, the air conditioner is controlled to raise the exhaust temperature of the compressor by 2 ℃ (namely Tp1 is equal to Tp +2), meanwhile, the wind speed of the fan is reduced by X%, the indoor environment temperature T1 and the indoor heat exchanger pipe temperature T2 are detected for 1 time every 3 minutes, and the steps are circularly operated in sequence until Tp is raised by 10 ℃, the wind speed of the fan is reduced to the lowest wind set by the air conditioner, or delta T2A is more than or equal to a, namely, the effective dehumidification in the cooling process is realized.
After a period of dehumidification of the air conditioner, e.g. Δ T1When the temperature is less than-0.5, the air conditioner automatically switches to heating and dehumidifying, namely the running frequency of the compressor is automatically reduced by 1Hz, and the indoor environment temperature T1 is detected for 1 time every 3 minutes until the temperature meets the delta T which is more than or equal to-0.51Controlling the air conditioner to be switched into constant temperature dehumidification operation after the temperature is less than or equal to +0.5 ℃; in the process, if delta 2 is more than or equal to a, the air conditioner does not do other actions except for controlling the running frequency of the compressor; if delta 2 < a, the air conditioner is controlled to raise the exhaust temperature of the compressor by 2 ℃ (namely Tp1 is Tp +2), and meanwhile, the wind speed of the fan is reduced by X%, and the indoor environment temperature T1 and the indoor heat exchanger pipe are detected 1 time every 3 minutesTemperature T2, and circulating the above steps until Tp is raised by 10 deg.C, and the wind speed of fan is reduced to the lowest wind set by air conditioner, or delta T2A is more than or equal to a, namely, effective dehumidification in the temperature rise process is realized.
Example four
When the air conditioner operates for dehumidification in a certain environment, and the dehumidification is started, the indoor environment temperature T1 and the indoor heat exchanger tube temperature T2 are detected, then the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 is obtained, and the temperature difference delta T is calculated1T1-TS, and Δ T2Td-T2. Due to Delta T1> +0.5, therefore, the air conditioner is controlled to cool and dehumidify, the air conditioner controls the running frequency of the compressor according to the common refrigeration condition, so that the indoor environment temperature T1 gradually approaches the indoor target temperature TS, meanwhile, in the process, if delta 2 is more than or equal to a, the air conditioner does not do extra action except for controlling the running frequency of the compressor so that the indoor environment temperature T1 gradually approaches the indoor target temperature TS; if delta 2 is less than a, the air conditioner is controlled to raise the exhaust temperature of the compressor by 2 ℃ (namely Tp1 is Tp +2) or reduce the wind speed of the fan by X%, the indoor environment temperature T1 and the indoor heat exchanger pipe temperature T2 are detected for 1 time every 3 minutes, and the steps are circularly operated in sequence until Tp is raised by 10 ℃, the wind speed of the fan is reduced to the lowest wind set by the air conditioner, or delta T2A is more than or equal to a, namely, the effective dehumidification in the cooling process is realized.
After the air conditioner dehumidifies for a period of time, if delta T is less than or equal to minus 0.51The air conditioner automatically switches to constant temperature dehumidification, if the T1 is in an ascending trend within 10 continuous minutes, the running frequency of the compressor automatically rises by 1Hz, otherwise, if the T1 is in a descending trend within 10 continuous minutes, the running frequency of the compressor automatically falls by 1Hz, and the indoor environment temperature T1 is detected every 10 minutes; in the process, if delta 2 is more than or equal to a, the air conditioner keeps the original running state unchanged except for frequency control; if delta 2 is less than a, the air conditioner is controlled to raise the exhaust temperature of the compressor by 2 ℃ (namely Tp1 is Tp +2) or reduce the wind speed of the fan by X%, the indoor environment temperature T1 and the indoor heat exchanger pipe temperature T2 are detected for 1 time every 3 minutes, and the steps are circularly operated in sequence until Tp is raised by 10 ℃ and the wind speed of the fan is reduced to beLowest wind, or Δ T, set by the air conditioner2A is more than or equal to a, namely constant temperature and effective dehumidification are realized.
Correspondingly, as shown in fig. 4, an embodiment of an air conditioner for implementing adaptive control of indoor temperature according to the present invention is shown. The air conditioner comprises a compressor assembly 1, a four-way valve 2, an indoor heat exchanger 3, an outdoor heat exchanger 4 and a throttling assembly 5, wherein the compressor assembly 1 can comprise a compressor 1a and a liquid storage tank 1b, and the four-way valve 2 comprises four ports (a port 2a, a port 2b, a port 2c and a port 2 d). The compressor assembly, the four-way valve 2, the indoor heat exchanger 3, the outdoor heat exchanger 4 and the throttling assembly 5 are connected through pipelines to form a refrigerating/heating circulation loop. A temperature sensor 31 is arranged at an air return opening of the indoor unit and is used for collecting indoor environment temperature T1; the indoor heat exchanger coil is provided with a temperature sensor 32 for collecting the pipe temperature T2 of the indoor heat exchanger. In addition, the air conditioner also comprises a control device 6, the control device 6 is used for obtaining the indoor environment temperature T1 and the indoor heat exchanger tube temperature T2, and obtaining the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1, and then according to the control method, the dehumidification control parameters are output according to the indoor environment temperature T1, the indoor heat exchanger tube temperature T2, the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 and the temperature Ts set by a user, so that the air conditioner is controlled, the room temperature is effectively controlled in the dehumidification process, and effective dehumidification is also realized.
As shown in fig. 5, there is shown a first embodiment of a dehumidifying control apparatus of an air conditioner according to the present invention. The dehumidification control apparatus 6 of this embodiment includes:
the first temperature obtaining module 610 is configured to obtain an indoor environment temperature T1 and an indoor heat exchanger tube temperature T2 of the air conditioner when the dehumidification instruction is detected;
a second temperature obtaining module 620, configured to obtain an instantaneous dew point temperature Td corresponding to the indoor environment T1;
a temperature difference calculating module 630, configured to calculate a temperature difference Δ T between the indoor ambient temperature T1 and the indoor target temperature Ts set by the user1And is instantaneousTemperature difference delta T between dew point temperature Td and indoor heat exchanger tube temperature T22；
A control module 640 for determining the temperature difference Δ T1And the temperature difference DeltaT2Controlling the operation of the air conditioner to make the temperature difference delta T1Within a preset temperature difference range, and the temperature difference delta T2Greater than or equal to a preset first temperature difference threshold value.
When the dehumidification command is detected, the first temperature obtaining module 610 obtains the indoor ambient temperature T1 detected by the temperature sensor 31 and the indoor heat exchanger temperature T2 detected by the temperature sensor 32. The second temperature acquisition module 620 then acquires the instantaneous dew point temperature Td corresponding to the indoor ambient temperature T1. The specific acquisition mode comprises the following steps: in one example, a corresponding dew point temperature calculation rule is preset in the air conditioner, then a parameter required by the dew point temperature calculation rule, such as the indoor ambient temperature, is obtained, and finally the instantaneous dew point temperature Td corresponding to the indoor ambient temperature T1 is obtained by calculation according to the obtained parameter and the dew point temperature calculation rule. In another example, a dew point temperature table may be pre-stored in the air conditioner, and the dew point temperature table records a mapping relationship between the indoor environment temperature and the dew point temperature, so that when the indoor environment temperature T1 is obtained, the instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 is obtained by table look-up according to the pre-stored dew point temperature table.
After the temperature difference calculating module 630 obtains the indoor environment temperature T1, the indoor heat exchanger tube temperature T2 and the instantaneous dew point temperature Td, Δ T is calculated1T1-Ts, and calculating Δ T2Td-T2. Where Ts is an indoor target temperature set by the user when controlling the air conditioner. Then, the control module 640 obtains two temperature differences according to the calculation, controls the operation of the air conditioner to control the indoor ambient temperature T1 of the air conditioner to approach the indoor target temperature Ts set by the user, and controls the temperature difference Δ T of the air conditioner2Greater than or equal to a preset first temperature difference threshold value.
According to the embodiment of the invention, the indoor environment temperature T1 and the indoor environment set by the user are obtainedTemperature difference Delta T of target temperature Ts1And the temperature difference DeltaT between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T22Then according to the temperature difference DeltaT1And temperature difference Delta T2And the air conditioner is controlled to operate, so that not only is the room temperature effectively controlled in the dehumidification process, but also the effective dehumidification is realized.
Further, as shown in fig. 6, the control module 640 includes:
a dehumidification control unit 641 for dividing the temperature difference Δ T2Comparing with a first temperature difference threshold; when the temperature difference DeltaT2When the temperature difference is smaller than the first temperature difference threshold value, the exhaust temperature of a compressor of the air conditioner is increased and/or the wind speed of a fan is reduced until the temperature difference delta T2And the air speed of the fan is reduced to the lowest air speed set by the air conditioner.
In this embodiment, the first temperature difference threshold is a preset value in the air conditioner, and the value range of the first temperature difference threshold is as follows: a is more than 0 ℃ and less than or equal to 10 ℃, wherein a is a first temperature difference threshold value. When temperature difference is delta T2If < a, it is necessary to dehumidify it. The method specifically comprises the following steps: increasing the discharge temperature of the compressor of the air conditioner and/or reducing the fan wind speed, and increasing the discharge temperature of the compressor of the air conditioner every timePThe value range is as follows: delta T at 1 deg.C or lessPThe temperature is less than or equal to 10 ℃, and the value range of X reduction of the wind speed of the fan of the air conditioner is more than or equal to 1% and less than or equal to 20%. Circulating in sequence until the temperature difference delta T2And the air speed of the fan is reduced to the lowest air speed set by the air conditioner. In this embodiment, the preset temperature threshold is 10 ℃. The exhaust temperature of the compressor is prevented from increasing all the time, and the safe operation of the compressor is ensured.
Further, the control module 640 further includes:
a temperature control unit 642 for controlling the temperature difference Δ T1When < -Y, reducing the compressor frequency of the air conditioner; when the temperature difference DeltaT1When the pressure is higher than + Y, increasing the frequency of the compressor of the air conditioner; when-Y is less than or equal to temperature difference delta T1When the frequency is less than or equal to + Y, keeping the frequency of the compressor of the air conditioner unchanged or allowing the frequency of the compressor of the air conditioner to float in a preset range; wherein [ -Y, + Y)]Is a preset temperature difference range.
In this embodiment, Y is a preset value of the air conditioner, and the value range of Y may be 0 ℃ or more and 1 ℃ or less. When taking Y as 0.5 ℃ for example, when Delta T1When the temperature is less than minus 0.5 ℃, the current indoor environment temperature T1 is lower than the indoor target temperature Ts set by the user, and the air conditioner is controlled to increase the indoor environment temperature, namely, the frequency of a compressor of the air conditioner is reduced. When the temperature difference DeltaT1If "0.5", it means that the current indoor ambient temperature T1 is higher than the indoor target temperature Ts set by the user, the air conditioner is controlled to decrease the indoor ambient temperature, i.e. the compressor frequency of the air conditioner is increased. When the temperature difference is less than or equal to-0.5, delta T1And when the temperature is less than or equal to +0.5, the current indoor environment temperature T1 basically tends to the indoor target temperature Ts set by the user and belongs to the reasonable temperature difference range controlled by the air conditioner, and at the moment, the frequency of the compressor of the air conditioner is kept unchanged or is allowed to float within the preset range.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structures or flow transformations made by the present specification and drawings, or applied directly or indirectly to other related arts, are included in the scope of the present invention.
Claims (10)
1. The dehumidification method of the air conditioner is characterized by comprising the following steps of:
when a dehumidification instruction is detected, acquiring an indoor environment temperature T1 and an indoor heat exchanger tube temperature T2 of the air conditioner;
acquiring an instantaneous dew point temperature Td corresponding to the indoor environment T1;
calculating the temperature difference Delta T between the indoor environment temperature T1 and the indoor target temperature Ts set by the user1And the temperature difference DeltaT between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T22；
According to said temperature difference DeltaT1And the temperature difference DeltaT2Controlling the operation of the air conditioner to make the temperature difference delta T1Within a preset temperature difference range, and the temperature difference delta T2Greater than or equal to a preset first temperature difference threshold value.
2. The dehumidifying method of an air conditioner according to claim 1, wherein said temperature difference Δ T is determined according to said temperature difference2Controlling the operation of the air conditioner to make the temperature difference delta T2The first temperature difference threshold value greater than or equal to the preset value comprises:
the temperature difference is measured by delta T2Comparing with a first temperature difference threshold;
when the temperature difference DeltaT2And when the temperature difference is smaller than the first temperature difference threshold value, the exhaust temperature of the compressor of the air conditioner is increased and/or the wind speed of the fan is reduced until the temperature difference is larger than or equal to the first temperature difference threshold value, or the exhaust temperature of the compressor of the air conditioner is increased to preset the temperature threshold value, and the wind speed of the fan is reduced to the lowest wind speed set by the air conditioner.
3. The dehumidifying method of claim 2, wherein the increment of the discharge temperature of the compressor of the air conditioner at each time is in a range of [1 ℃, 10 ℃; the decrement of the wind speed of the fan of the air conditioner is within the value range of 1 percent and 20 percent every time.
4. The dehumidifying method of an air conditioner according to claim 1, wherein said temperature difference Δ T is determined according to said temperature difference1Controlling the operation of the air conditioner to make the temperature difference delta T1The temperature difference range comprises:
when the temperature difference DeltaT1When < -Y, reducing the compressor frequency of the air conditioner;
when the temperature difference DeltaT1When the pressure is higher than + Y, increasing the frequency of the compressor of the air conditioner;
when-Y is less than or equal to temperature difference delta T1When the frequency is less than or equal to Y, the frequency of the compressor of the air conditioner is kept unchanged or allowedAllowing the frequency of a compressor of the air conditioner to float within a preset range;
wherein [ -Y, + Y ] is a preset temperature difference range.
5. The air conditioner dehumidification method as set forth in any one of claims 1 to 4, wherein said obtaining an instantaneous dew point temperature Td corresponding to said indoor ambient temperature T1 comprises:
calculating to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 according to the indoor environment temperature T1 and a preset calculation rule; or,
and inquiring a preset dew point temperature table according to the indoor environment temperature T1 to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1.
6. An air conditioner, characterized in that, the air conditioner includes a dehumidification control device, wherein the dehumidification control device includes:
the first temperature acquisition module is used for acquiring the indoor environment temperature T1 and the indoor heat exchanger tube temperature T2 of the air conditioner when a dehumidification instruction is detected;
a second temperature acquisition module for acquiring an instantaneous dew point temperature Td corresponding to the indoor environment T1;
a temperature difference calculation module for calculating the temperature difference Delta T between the indoor environment temperature T1 and the indoor target temperature Ts set by the user1And the temperature difference DeltaT between the instantaneous dew point temperature Td and the indoor heat exchanger tube temperature T22；
A control module for determining the temperature difference Δ T1And the temperature difference DeltaT2Controlling the operation of the air conditioner to make the temperature difference delta T1Within a preset temperature difference range, and the temperature difference delta T2Greater than or equal to a preset first temperature difference threshold value.
7. The air conditioner according to claim 6, wherein the control module comprises:
a dehumidification control unit for converting the temperature difference Delta T2Comparing with a first temperature difference threshold; when the temperature difference DeltaT2When the temperature difference is smaller than the first temperature difference threshold value, the exhaust temperature of a compressor of the air conditioner is increased and/or the wind speed of a fan is reduced until the temperature difference delta T2And the air speed of the fan is reduced to the lowest air speed set by the air conditioner.
8. The air conditioner according to claim 7, wherein in the dehumidification control unit, an increment of an exhaust temperature of a compressor of the air conditioner at each time is in a range of [1 ℃, 10 ℃; the decrement of the wind speed of the fan of the air conditioner is within the value range of 1 percent and 20 percent every time.
9. The air conditioner according to claim 6, wherein the control module comprises:
a temperature control unit for: when the temperature difference DeltaT1When < -Y, reducing the compressor frequency of the air conditioner; when the temperature difference DeltaT1When the pressure is higher than + Y, increasing the frequency of the compressor of the air conditioner; when-Y is less than or equal to temperature difference delta T1When the frequency is less than or equal to + Y, keeping the frequency of the compressor of the air conditioner unchanged or allowing the frequency of the compressor of the air conditioner to float in a preset range; wherein [ -Y, + Y)]Is a preset temperature difference range.
10. The air conditioner according to any one of claims 6 to 9, wherein the second temperature obtaining module is configured to: calculating to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1 according to the indoor environment temperature T1 and a preset calculation rule; or,
and inquiring a preset dew point temperature table according to the indoor environment temperature T1 to obtain an instantaneous dew point temperature Td corresponding to the indoor environment temperature T1.
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| CN109556257A (en) * | 2018-11-06 | 2019-04-02 | 青岛海尔空调电子有限公司 | Air conditioner and its dehumidification control method |
| CN109556257B (en) * | 2018-11-06 | 2021-04-20 | 青岛海尔空调电子有限公司 | Air conditioner and dehumidification control method thereof |
| CN109855184A (en) * | 2019-01-23 | 2019-06-07 | 青岛海尔空调器有限总公司 | Air conditioner and its dehumidification control method |
| CN109855184B (en) * | 2019-01-23 | 2020-12-25 | 青岛海尔空调器有限总公司 | Air conditioner and dehumidification control method thereof |
| CN109945445A (en) * | 2019-03-04 | 2019-06-28 | 青岛海尔空调器有限总公司 | Air conditioner and its control method |
| CN111623467A (en) * | 2020-05-12 | 2020-09-04 | 海信（广东）空调有限公司 | Air conditioner control method and air conditioner |
| CN115247858A (en) * | 2022-05-16 | 2022-10-28 | 美的集团武汉暖通设备有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
| CN115247858B (en) * | 2022-05-16 | 2024-04-26 | 美的集团武汉暖通设备有限公司 | Air conditioner, control method thereof and computer readable storage medium |
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