double-air-duct air conditioner and dehumidification method and system thereof
阅读说明：本技术 一种双风道空调及其除湿方法、系统 (double-air-duct air conditioner and dehumidification method and system thereof ) 是由 王军 李本卫 于 2019-10-12 设计创作，主要内容包括：本发明涉及制冷设备领域,公开了一种双风道空调及其除湿方法、系统。在本发明中,通过获取用户设定的目标温度Ts、目标相对湿度φs、室内环境温度Tin和室内相对湿度φ,当目标温差E小于或等于第一预设温差E1,且室内相对湿度φ大于或等于第一预设相对湿度φ1或者室内相对湿度φ与目标相对湿度φs之间的差值Δφ大于或等于预设相对湿差φ2时,空调进入超低显热高潜热负荷区模式,控制空调的压缩机以低频率运行,控制下部风机以低风档位继续运转,控制上部风机停止运转或继续以低风档位继续运转,控制上部蒸发器阻断制冷剂,使制冷剂从下部蒸发器通过。采用本发明,能够提高压缩机低频运行时的潜热输出,降低显热输出,实现恒温除湿。(The invention relates to the field of refrigeration equipment, and discloses a double-air-channel air conditioner and a dehumidification method and a dehumidification system thereof.)
The dehumidification method of the dual-air-channel air conditioner is characterized in that an indoor unit of the dual-air-channel air conditioner comprises an upper air channel and a lower air channel, an upper fan and an upper evaporator are arranged on the upper air channel, and a lower fan and a lower evaporator are arranged on the lower air channel, and comprises the following steps:
after the double-air-duct air conditioner receives a dehumidification instruction or operates in a refrigeration mode, acquiring a target temperature Ts and a target relative humidity phi set by a user, and acquiring an indoor environment temperature Tin and an indoor relative humidity phi in real time;
judging whether the target temperature difference E between the target temperature Ts and the indoor environment temperature Tin is less than or equal to th preset temperature difference E1, and simultaneously judging whether the indoor relative humidity phi is greater than or equal to th preset relative humidity phi 1 or whether the difference value delta phi between the indoor relative humidity phi and the target relative humidity phi s is greater than or equal to preset relative humidity difference phi 2, wherein the temperature is 2 ℃ or more than E1 & gt-3 ℃, the temperature is 100% or more than phi 1 or more than 70%, and the temperature is 50% or more than phi 2 or more than 10%;
if the target temperature difference E between the target temperature Ts and the indoor environment temperature Tin is less than or equal to th preset temperature difference E1, and the indoor relative humidity phi is greater than or equal to preset relative humidity phi 1 or the difference value delta phi between the indoor relative humidity phi and the target relative humidity phi s is greater than or equal to preset relative humidity difference phi 2, the dual-air-duct air conditioner enters an ultra-low sensible heat high latent heat load area mode;
when the double-air-duct air conditioner operates in an ultralow sensible heat and high latent heat load area mode, controlling the compressor of the double-air-duct air conditioner to operate at a low frequency, controlling the lower fan to continue to operate at a low wind gear, controlling the upper fan to stop operating or continue to operate at a low wind gear, and controlling the upper evaporator to block refrigerant so that the refrigerant passes through the lower evaporator.
2. The dehumidification method of kinds of dual-duct air conditioners, as claimed in claim 1, wherein during the operation of the dual-duct air conditioner in the ultra-low sensible heat and high latent heat load area mode, the rotation speed R of the lower fan varies according to the variation of the difference Δ T between the dew point temperature TL and the temperature Te of the lower evaporator, and the control of the rotation speed R of the lower fan is specifically:
after the double-air-duct air conditioner is operated in the ultra-low sensible heat high latent heat load area mode for a time period of T1, when the indoor relative humidity phi is larger than the target relative humidity phi s, if delta T is within a preset threshold range, namely T2 is not smaller than delta T is not smaller than T1, the rotating speed R (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan, (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan minus the rotating speed DeltaR of preset gears of the lower fan if delta T is smaller than T2, the rotating speed R (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan, (n) of the lower fan is increased by the rotating speed DeltaR of 3 preset gears of the lower fan if delta T1, and (n +1) of the lower fan is equal to the rotating speed R () of the lower fan of the upper 464 operating period of the lower fan when the indoor relative humidity is smaller than or smaller than the target humidity s;
the double-air-duct air conditioner detects the indoor environment temperature Tin and the indoor relative humidity phi times at the time of T2 operation in an ultra-low sensible heat high latent heat load area mode, automatically corrects according to an indoor environment temperature-indoor relative humidity-dew point temperature comparison table in the system to obtain a new dew point temperature TL, calculates delta T, and continuously confirms the new rotating speed of the lower fan;
wherein the temperature is more than or equal to 20 ℃, T1 is more than or equal to T2 and more than or equal to 0 ℃, T1 and more than or equal to 0.5min, T2 and more than or equal to 0.5min, delta R and more than or equal to 1rpm, the upper limit value of R is the low-wind gear rotating speed of the fan, and the lower limit value of R is the lowest rotating speed of the fan in reliable operation.
3. The dehumidification method of kinds of double-air-duct air conditioners as claimed in claim 1 or 2, wherein an upper electric heater is arranged on the upper air duct, a lower electric heater is arranged on the lower air duct, and when the double-air-duct air conditioner is continuously operated in an ultra-low sensible heat and high latent heat load area mode, if a target temperature difference E is less than or equal to a second preset temperature difference E2, or two of the upper electric heater and the lower electric heater are turned on, and 2 ℃ is greater than or equal to E1 and greater than E2 and greater than or equal to-3 ℃, wherein the upper fan is turned on synchronously while the upper electric heater is turned on.
4. The dehumidification method of kinds of double-duct air conditioners, as claimed in claim 1, wherein the frequency F of the compressor of the double-duct air conditioner is positively and strongly correlated to the target temperature difference E, the larger the value of E, the higher the value of F, the minimum value of the frequency F of the compressor is Fmin, and the maximum value is N% ＊ Fmax, wherein N is less than or equal to 40, N% ＊ Fmax also belongs to the low frequency range of the compressor, Fmin is the minimum frequency at which the compressor can operate reliably, and Fmax is the maximum frequency at which the compressor can operate reliably.
5, A dehumidification system of a double-air-channel air conditioner, characterized in that, the indoor machine of the double-air-channel air conditioner comprises an upper air channel and a lower air channel, the upper air channel is provided with an upper fan and an upper evaporator, the lower air channel is provided with a lower fan and a lower evaporator, the dehumidification system of the double-air-channel air conditioner comprises:
the acquisition module is used for acquiring a target temperature Ts and a target relative humidity phi s set by a user and acquiring an indoor environment temperature Tin and an indoor relative humidity phi in real time;
the judging module is used for judging whether the double-air-duct air conditioner meets th parameter conditions required by entering an ultralow sensible heat and high latent heat load area mode, wherein the th parameter conditions are that a target temperature difference E between a target temperature Ts and an indoor environment temperature Tin is smaller than or equal to th preset temperature difference E1, and meanwhile, whether indoor relative humidity phi is larger than or equal to th preset relative humidity phi 1 or a difference value delta phi between the indoor relative humidity phi and a target relative humidity phi is larger than or equal to preset relative humidity phi 2 is judged, wherein the temperature of 2 ℃ is more than or equal to E1 < -3 ℃, the temperature of 100% is more than or equal to phi 1 and more than or equal to 70%, and the temperature of 50% is more than or equal to phi 2 and more than or;
and the control module is used for controlling the compressor of the double-air-channel air conditioner to run at a low frequency, controlling the lower fan to continue running at a low wind gear, controlling the upper fan to stop running or continue running at the low wind gear, and controlling the upper evaporator to block the refrigerant so that the refrigerant passes through the lower evaporator when judging that the double-air-channel air conditioner meets the th parameter condition required for entering the ultralow sensible heat and high latent heat load area mode.
6. The dehumidification system of kind of double-air-conditioner as recited in claim 5, wherein,
the acquisition module is further used for acquiring the temperature Te and the dew point temperature TL of the lower evaporator in real time and acquiring the difference value delta T between the dew point temperature TL and the temperature Te of the lower evaporator;
the judgment module is further configured to judge whether the lower fan meets a second parameter condition required for keeping the rotation speed unchanged, judge whether the lower fan meets a third parameter condition required for reducing the rotation speed, and judge whether the lower fan meets a fourth parameter condition required for increasing the rotation speed, where the second parameter condition is that after the dual-air-duct air conditioner operates in the ultra-low sensible heat high latent heat load area dehumidification mode for a time period of T1, the indoor relative humidity phi is less than or equal to the target relative humidity phi s, or the indoor relative humidity phi is greater than the target relative humidity phi s, and a difference Δ T between the dew point temperature TL and the temperature Te of the lower evaporator is within a preset threshold range, that is, T2 is less than or equal to Δ T is less than or equal to T1; the third parameter condition is that after the double-air-duct air conditioner operates in a dehumidification mode of an ultralow sensible heat and high latent heat load area for a time period of T1, the indoor relative humidity phi is greater than the target relative humidity phi s, and the difference value delta T between the dew point temperature TL and the temperature Te of the lower evaporator is less than T2; the fourth parameter condition is that after the double-air-duct air conditioner operates in a dehumidification mode of an ultralow sensible heat and high latent heat load area for a time period of T1, the indoor relative humidity phi is greater than the target relative humidity phi s, and the difference value delta T between the dew point temperature TL and the temperature Te of the lower evaporator is greater than T1;
the control module is further used for controlling the rotating speed of the lower fan to keep unchanged when the parameter condition is judged to be the second parameter condition, controlling the rotating speed of the lower fan to be reduced by delta R when the parameter condition is judged to be the third parameter condition, and controlling the rotating speed of the lower fan to be increased by delta R when the parameter condition is judged to be the fourth parameter condition;
wherein the temperature is more than or equal to 20 ℃ and more than or equal to T1 and more than or equal to T2 and more than or equal to 0 ℃, T1 and more than or equal to 0.5min, the delta R is more than or equal to 1rpm, the upper limit value of the R is the low-wind gear rotating speed of the fan, and the lower limit value of the R is the lowest rotating speed of the fan in reliable operation.
7. The dehumidification system of kinds of double-air-channel air conditioners as claimed in claim 5 or 6, wherein an upper electric heater is arranged on the upper air channel, and a lower electric heater is arranged on the lower air channel;
the judgment module is further used for judging whether the upper electric heater and the lower electric heater meet a fifth parameter condition required by starting, wherein the fifth parameter condition is that a target temperature difference E is less than or equal to a second preset temperature difference E2, and E1 is more than or equal to 2 ℃ and E2 is more than or equal to-3 ℃;
the control module is further configured to control or two of the upper electric heater and the lower electric heater to be turned on when the parameter condition is determined to be a fifth parameter condition, wherein the upper fan is turned on synchronously while the upper electric heater is turned on.
The dual-duct air conditioner of , wherein the dehumidification system of the dual-duct air conditioner is as claimed in any of of claims 5 to 7, wherein the indoor unit of the dual-duct air conditioner further comprises a humidity sensor for detecting indoor relative humidity, a th temperature sensor for detecting indoor ambient temperature, a second temperature sensor for detecting temperature of the lower evaporator, and a solenoid valve for controlling the upper evaporator to conduct or block refrigerant, the humidity sensor, the th temperature sensor and the second temperature sensor are respectively electrically connected to the obtaining module, and the solenoid valve is electrically connected to the control module.
9. The kind of double-air-channel air conditioner as claimed in claim 8, wherein a partition plate is provided between the upper air channel and the lower air channel.
10. The kinds of double-air-duct air conditioner as claimed in claim 8, wherein the general inlet of the upper evaporator and the general inlet of the lower evaporator are connected to a general flow divider respectively, the upper evaporator includes 1 or more than 1 branch, and when the upper evaporator is composed of more than 1 branch, the branch inlet of the upper evaporator is provided with an upper flow divider, the solenoid valve is arranged between the general flow divider and the general inlet of the upper evaporator, the lower evaporator includes 1 or more than 1 branch, and when the lower evaporator is composed of more than 1 branch, the branch inlet of the lower evaporator is provided with a lower flow divider, and the second temperature sensor is arranged at the middle position of branches of the lower evaporator.
Technical Field
The invention relates to the field of refrigeration equipment, in particular to double-air-channel air conditioners and a dehumidification method and system thereof.
Background
The load of the air conditioner during the refrigeration process refers to sensible heat Wsensible heat Wlatent heat required for reducing the current temperature and humidity to certain set temperature and humidity.
Fig. 1 shows a typical house type of a fixed area in a high-humidity city, typically , where the temperature is 27 c and the relative humidity is 50%, and the load point (sensible heat + latent heat) distribution of the room is shown as a circle black point during 1/5-9/30/9/annually, the abscissa is the sensible heat load of the room and the ordinate is the latent heat load of the room.
The coverage area of the irregular graph in fig. 1 is a certain 1.5-piece variable frequency air conditioner matched with a typical room type area, the output capacity (sensible heat plus latent heat) of the air conditioner is set at a fixed outdoor temperature and humidity, the wind speed gear is respectively set with strong wind, high wind, medium wind and low wind, when the compressor frequency is from low to high, the output abscissa sensible heat and the ordinate latent heat of the air conditioner are two-dimensional coordinate graphs, so that the overlapping part is small, the overlapping part is caused by the fact that the 1.5-piece frequency is set, the output capacity is , under the existing 4-grade wind speed condition, the sensible heat component is obviously large, the latent heat component is obviously small, the overlapping part is caused by the sensible heat and latent heat of the room, the area of a load point of the sensible heat and the latent heat of the room is less than the area surrounded by the output sensible heat and latent heat of the air conditioner, the overlapping part shows that the refrigerating output capacity of the air conditioner can control the temperature and the humidity of the room to the comfortable temperature and humidity set by the user, the humidity of the room, the non-overlapping part shows that the refrigerating output capacity of the air conditioner is controlled to be lower than the sensible heat and the humidity of the humidity when the humidity of the room is lower than the humidity when the humidity of the humidity when the humidity of the room is set by the humidity of the room, the humidity of the room, the humidity of the room, the humidity is set by the humidity of the room, the humidity of the room, the humidity is 1400, the room, the humidity of the humidity, the humidity of the room, the humidity of the room, the humidity of the humidity, the room, the.
Fig. 2 is a distribution diagram of load points (sensible heat amount + latent heat amount) dividing an output load of an air conditioner into four areas according to conditions such as outdoor environment temperature, indoor relative humidity, set temperature and the like when the air conditioner is cooled or dehumidified, wherein an area indicated by a reference mark a in fig. 2 is a middle and high sensible heat load area, and the air conditioner mainly cools down and secondarily dehumidifies; the area marked by the mark B in FIG. 2 is a low sensible heat and low latent heat load area, and the cooling and dehumidifying requirements of the air conditioner are low; the area indicated by the reference number C in fig. 2 is a low sensible heat and high latent heat load area, the gear of the indoor fan is extended downward for several gears (rotating speed is reduced), the latent heat component of the air conditioner is increased, and the sensible heat component is reduced, although full coverage cannot be realized, the coverage area is obviously increased compared with the original wind speed gear; the area designated by the reference numeral D in fig. 2 is an ultra-low sensible heat and high latent heat load area, and is also an area which cannot be covered by the existing air conditioning product.
The reason why the ultra-low sensible heat load and the high latent heat load are generated in the region, the sensible heat output and the latent heat output of the air conditioner cannot meet the dehumidification requirement is that when the air conditioner compressor operates at a low frequency, the area of the evaporator is too large, the temperature is close to the dew point temperature or even higher than the dew point temperature, the latent heat capacity of the air conditioner is almost 0, and the dehumidification capacity is lost.
In order to meet the requirement that the room load of the area is fully covered by latent heat and sensible heat during refrigeration of the air conditioner, the optimal scheme is a scheme of not cooling and dehumidifying, the room temperature and the room humidity can be controlled to the comfortable temperature and humidity of a user, but the whole machine cost is greatly increased and the energy efficiency is reduced due to the fact that the air conditioner is not cooled and dehumidified, and air conditioner products which are not cooled and dehumidified are fresh in the market actually.
Therefore, how to improve the dehumidification capability of the low-temperature and high-humidity areas in the air conditioner in plum rain seasons without increasing extra or small cost becomes an industrial problem.
Disclosure of Invention
The invention aims to solve technical problems in the prior art at least at the fixed distance of , and therefore, the invention aims to provide double-air-channel air conditioner, a dehumidification method and a dehumidification system thereof, which can reduce sensible heat output of the air conditioner, improve latent heat output and realize constant temperature dehumidification.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the aspect of the invention provides a dehumidification method of double-air-channel air conditioners, wherein an indoor unit of each double-air-channel air conditioner comprises an upper air channel and a lower air channel, an upper fan and an upper evaporator are arranged on the upper air channel, and a lower fan and a lower evaporator are arranged on the lower air channel, and the dehumidification method of the double-air-channel air conditioner comprises the following steps:
after the double-air-duct air conditioner receives a dehumidification instruction or operates in a refrigeration mode, acquiring a target temperature Ts and a target relative humidity phi set by a user, and acquiring an indoor environment temperature Tin and an indoor relative humidity phi in real time;
judging whether the target temperature difference E between the target temperature Ts and the indoor environment temperature Tin is less than or equal to th preset temperature difference E1, and simultaneously judging whether the indoor relative humidity phi is greater than or equal to th preset relative humidity phi 1 or whether the difference value delta phi between the indoor relative humidity phi and the target relative humidity phi s is greater than or equal to preset relative humidity difference phi 2, wherein the temperature is 2 ℃ or more than E1 & gt-3 ℃, the temperature is 100% or more than phi 1 or more than 70%, and the temperature is 50% or more than phi 2 or more than 10%;
if the target temperature difference E between the target temperature Ts and the indoor environment temperature Tin is less than or equal to th preset temperature difference E1, and the indoor relative humidity phi is greater than or equal to preset relative humidity phi 1 or the difference value delta phi between the indoor relative humidity phi and the target relative humidity phi s is greater than or equal to preset relative humidity difference phi 2, the dual-air-duct air conditioner enters an ultra-low sensible heat high latent heat load area mode;
when the double-air-duct air conditioner operates in an ultralow sensible heat and high latent heat load area mode, controlling the compressor of the double-air-duct air conditioner to operate at a low frequency, controlling the lower fan to continue to operate at a low wind gear, controlling the upper fan to stop operating or continue to operate at a low wind gear, and controlling the upper evaporator to block refrigerant so that the refrigerant passes through the lower evaporator.
As a preferable aspect of the dehumidification method of the present invention, during the operation of the dual air conditioner in the ultra-low sensible heat and high latent heat load region mode, the rotation speed R of the lower fan is changed according to a change in a difference Δ T (Δ T — Te) between the dew point temperature TL and the temperature Te of the lower evaporator, and the control of the rotation speed R of the lower fan is specifically:
after the double-air-duct air conditioner is operated in the ultra-low sensible heat high latent heat load area mode for a time period of T1, when the indoor relative humidity phi is larger than the target relative humidity phi s, if delta T is within a preset threshold range, namely T2 is not smaller than delta T is not smaller than T1, the rotating speed R (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan, (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan minus the rotating speed DeltaR of preset gears of the lower fan if delta T is smaller than T2, the rotating speed R (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan, (n) of the lower fan is increased by the rotating speed DeltaR of 3 preset gears of the lower fan if delta T1, and (n +1) of the lower fan is equal to the rotating speed R () of the lower fan of the upper 464 operating period of the lower fan when the indoor relative humidity is smaller than or smaller than the target humidity s;
the double-air-duct air conditioner detects the indoor environment temperature Tin and the indoor relative humidity phi times at the time of T2 operation in an ultra-low sensible heat high latent heat load area mode, automatically corrects according to an indoor environment temperature-indoor relative humidity-dew point temperature comparison table in the system to obtain a new dew point temperature TL, calculates delta T, and continuously confirms the new rotating speed of the lower fan;
wherein the temperature is more than or equal to 20 ℃, T1 is more than or equal to T2 and more than or equal to 0 ℃, T1 and more than or equal to 0.5min, T2 and more than or equal to 0.5min, delta R and more than or equal to 1rpm, the upper limit value of R is the low-wind gear rotating speed of the fan, and the lower limit value of R is the lowest rotating speed of the fan in reliable operation.
As a preferable scheme of the dehumidification method, an upper electric heater is arranged on the upper air duct, a lower electric heater is arranged on the lower air duct, or two of the upper electric heater and the lower electric heater are started when a target temperature difference E is less than or equal to a second preset temperature difference E2 in the continuous operation process of the double-air-duct air conditioner in an ultralow sensible heat and high latent heat load area mode, the temperature is 2 ℃ or higher E1 or higher E2 or higher-3 ℃, and the upper fan is synchronously started while the upper electric heater is started.
As a preferable scheme of the dehumidification method, the frequency F of the compressor of the double-air-channel air conditioner is in positive and strong correlation with the target temperature difference E, the larger the value E is, the higher the value F is, the minimum value of the frequency F of the compressor is Fmin, the maximum value of the frequency F is N% ＊ Fmax, and the frequency F is dynamically changed according to the change of the value E, wherein N is less than or equal to 40, N% ＊ Fmax also belongs to a low-frequency interval of the compressor, Fmin is the minimum frequency of reliable operation of the compressor, and Fmax is the maximum frequency of reliable operation of the compressor.
The embodiment of the second aspect of the invention provides dehumidification systems of double-air-channel air conditioners, wherein an indoor unit of the double-air-channel air conditioner comprises an upper air channel and a lower air channel, an upper fan and an upper evaporator are arranged on the upper air channel, a lower fan and a lower evaporator are arranged on the lower air channel, and the dehumidification systems of the double-air-channel air conditioners comprise:
the acquisition module is used for acquiring a target temperature Ts and a target relative humidity phi s set by a user and acquiring an indoor environment temperature Tin and an indoor relative humidity phi in real time;
the judging module is used for judging whether the double-air-duct air conditioner meets th parameter conditions required by entering an ultralow sensible heat and high latent heat load area mode, wherein the th parameter conditions are that a target temperature difference E between a target temperature Ts and an indoor environment temperature Tin is smaller than or equal to th preset temperature difference E1, and meanwhile, whether indoor relative humidity phi is larger than or equal to th preset relative humidity phi 1 or a difference value delta phi between the indoor relative humidity phi and a target relative humidity phi is larger than or equal to preset relative humidity phi 2 is judged, wherein the temperature of 2 ℃ is more than or equal to E1 < -3 ℃, the temperature of 100% is more than or equal to phi 1 and more than or equal to 70%, and the temperature of 50% is more than or equal to phi 2 and more than or;
and the control module is used for controlling the compressor of the double-air-channel air conditioner to run at a low frequency, controlling the lower fan to continue running at a low wind gear, controlling the upper fan to stop running or continue running at the low wind gear, and controlling the upper evaporator to block the refrigerant so that the refrigerant passes through the lower evaporator when judging that the double-air-channel air conditioner meets the th parameter condition required for entering the ultralow sensible heat and high latent heat load area mode.
As a preferred scheme of the dehumidification system of the present invention, the obtaining module is further configured to obtain a temperature Te and a dew point temperature TL of the lower evaporator in real time, and obtain a difference Δ T between the dew point temperature TL and the temperature Te of the lower evaporator; the judgment module is further configured to judge whether the lower fan meets a second parameter condition required for keeping the rotation speed unchanged, judge whether the lower fan meets a third parameter condition required for reducing the rotation speed, and judge whether the lower fan meets a fourth parameter condition required for increasing the rotation speed, where the second parameter condition is that after the dual-air-duct air conditioner operates in the ultra-low sensible heat high latent heat load area dehumidification mode for a time period of T1, the indoor relative humidity phi is less than or equal to the target relative humidity phi s, or the indoor relative humidity phi is greater than the target relative humidity phi s, and a difference Δ T between the dew point temperature TL and the temperature Te of the lower evaporator is within a preset threshold range, that is, T2 is less than or equal to Δ T is less than or equal to T1; the third parameter condition is that after the double-air-duct air conditioner operates in a dehumidification mode of an ultralow sensible heat and high latent heat load area for a time period of T1, the indoor relative humidity phi is greater than the target relative humidity phi s, and the difference value delta T between the dew point temperature TL and the temperature Te of the lower evaporator is less than T2; the fourth parameter condition is that after the double-air-duct air conditioner operates in a dehumidification mode of an ultralow sensible heat and high latent heat load area for a time period of T1, the indoor relative humidity phi is greater than the target relative humidity phi s, and the difference value delta T between the dew point temperature TL and the temperature Te of the lower evaporator is greater than T1; the control module is further used for controlling the rotating speed of the lower fan to keep unchanged when the parameter condition is judged to be the second parameter condition, controlling the rotating speed of the lower fan to be reduced by delta R when the parameter condition is judged to be the third parameter condition, and controlling the rotating speed of the lower fan to be increased by delta R when the parameter condition is judged to be the fourth parameter condition; wherein the temperature is more than or equal to 20 ℃ and more than or equal to T1 and more than or equal to T2 and more than or equal to 0 ℃, T1 and more than or equal to 0.5min, the delta R is more than or equal to 1rpm, the upper limit value of the R is the low-wind gear rotating speed of the fan, and the lower limit value of the R is the lowest rotating speed of the fan in reliable operation.
The dehumidifying system comprises an upper air duct, a lower air duct, a judging module and a control module, wherein the upper air duct is provided with an upper electric heater, the lower air duct is provided with a lower electric heater, the judging module is further used for judging whether the upper electric heater and the lower electric heater meet a fifth parameter condition required by starting, the fifth parameter condition is that a target temperature difference E is smaller than or equal to a second preset temperature difference E2, wherein the temperature is 2 ℃ or more, E1 is larger than E2 is larger than or equal to-3 ℃, the control module is further used for controlling or two of the upper electric heater and the lower electric heater to be started when the parameter condition is judged to be the fifth parameter condition, and the upper fan is synchronously started while the upper electric heater is started.
An embodiment of a third aspect of the present invention provides dual-duct air conditioner, which includes the dehumidification system of the dual-duct air conditioner described in the above items, wherein the indoor unit of the dual-duct air conditioner further includes a humidity sensor for detecting indoor relative humidity, a th temperature sensor for detecting indoor ambient temperature, a second temperature sensor for detecting temperature of a lower evaporator, and an electromagnetic valve for controlling the upper evaporator to conduct or block refrigerant, the humidity sensor, the th temperature sensor, and the second temperature sensor are respectively electrically connected to the acquisition module, and the electromagnetic valve is electrically connected to the control module.
As a preferable scheme of the dual air-conditioning of the present invention, a partition plate is disposed between the upper air duct and the lower air duct.
As a preferred scheme of the dual-air-duct air conditioner of the present invention, a total inlet of the upper evaporator and a total inlet of the lower evaporator are respectively connected to a total flow divider, the upper evaporator includes 1 or more than 1 branch, and when the upper evaporator is composed of 1 or more than 1 branch, an upper flow divider is disposed at a branch inlet of the upper evaporator, the solenoid valve is disposed between the total flow divider and the total inlet of the upper evaporator, the lower evaporator includes 1 or more than 1 branch, and when the lower evaporator is composed of 1 or more than 1 branch, a lower flow divider is disposed at a branch inlet of the lower evaporator, and the second temperature sensor is disposed at a middle position of branches of the lower evaporator.
Compared with the prior art, the double-air-channel air conditioners and the dehumidification method and the dehumidification system thereof have the advantages that:
the embodiment of the invention obtains a target temperature Ts and a target relative humidity φ s set by a user, obtains an indoor environment temperature Tin and an indoor relative humidity φ in real time, judges that the target temperature difference E is less than or equal to a -th preset temperature difference E1, and the indoor relative humidity φ is greater than or equal to a -th preset relative humidity φ 1 or a difference value delta φ between the indoor relative humidity φ and the target relative humidity φ s is greater than or equal to a preset relative humidity difference φ 2, controls the air conditioner to switch to an ultra-low sensible heat high latent heat load region mode, controls compressors of a double-air-duct air conditioner to operate at a low frequency, controls a lower fan to continue to operate at a low wind gear, controls an upper evaporator to block refrigerant to enable the refrigerant to pass through the lower evaporator, thereby dividing the evaporator into two parts, wherein no refrigerant flows through a part, and a refrigerant passes through part , namely, the evaporation area of the evaporator is reduced, the temperature is reduced, the output of the compressor at the low frequency is improved, the constant temperature, the sensible heat output comfort is reduced, the sensible heat output of the air conditioner is reduced, the sensible heat output of the air conditioner, and the air conditioner is reduced, the sensible heat reduced, and the sensible heat reduced in a normal cooling period is reduced, and the sensible heat reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a distribution diagram of load points of a room in a high-humidity city, a typical room type of a fixed area, with a temperature of 27 ℃ and a relative humidity of 50%, during a period of 5 months and 1 day to 9 months and 30 days per year;
fig. 2 is a distribution diagram of load points dividing an output load of an air conditioner into four regions according to conditions such as an outdoor ambient temperature, an indoor relative humidity, and a set temperature;
fig. 3 is a schematic structural view of an indoor unit of kinds of dual duct air conditioners provided by the invention;
FIG. 4 is a flow chart of the dehumidification method of kinds of double-air-channel air conditioners provided by the invention;
fig. 5 is a connection block diagram of the dehumidification system of kinds of double-duct air conditioners provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of of the present invention, rather than all embodiments.
Fig. 3 is a schematic structural diagram of dual air-conditioners according to an embodiment of the present invention, and as shown in fig. 3, an indoor unit of the dual air-conditioner includes an upper air duct 1 and a lower air duct 2, where the upper air duct 1 is provided with an upper fan and an upper evaporator 3, and the lower air duct 2 is provided with a lower fan and a
Fig. 4 is a flowchart of a dehumidification method of a dual-duct air conditioner according to embodiments of the present invention, and as shown in fig. 4, the dehumidification method of the dual-duct air conditioner includes the following steps:
step S101, after the dual-air-channel air conditioner receives a dehumidification instruction or operates in a refrigeration mode, a target temperature Ts and a target relative humidity φ S set by a user are obtained, and an indoor environment temperature Tin and an indoor relative humidity φ are obtained in real time, specifically, the user can send a starting instruction to the air conditioner through a remote controller of the air conditioner, a control display screen of the air conditioner, an APP of a mobile terminal, a client of a PC and the like to control the air conditioner to start, and the target temperature Ts and the target relative humidity φ S of the air conditioner are set, wherein the range of φ S manually set by the user is a relative humidity range which is relatively comfortable for human, namely the upper limit of φ S is 70%, the lower limit of φ S is 30%, if the user does not manually set, the relative humidity is a certain relative humidity in a default humidity comfortable range of 30% -70%, and if the relative humidity is not.
Step S102, judging whether a target temperature difference E between a target temperature Ts and an indoor environment temperature Tin is less than or equal to a th preset temperature difference E1, and simultaneously judging whether an indoor relative humidity phi is greater than or equal to a th preset relative humidity phi 1 or a difference value delta phi between the indoor relative humidity phi and a target relative humidity phi S is greater than or equal to a preset relative humidity difference phi 2, wherein the temperature is 2 ℃ or more, E1 < -3 >, 100% or more phi 1 is greater than or equal to 70%, and 50% or more phi 2 is greater than or equal to 10%;
step S103, if the target temperature difference E between the target temperature Ts and the indoor environment temperature Tin is less than or equal to th preset temperature difference E1, and the indoor relative humidity phi is greater than or equal to preset relative humidity phi 1 or the difference value delta phi between the indoor relative humidity phi and the target relative humidity phi S is greater than or equal to preset relative humidity difference phi 2, the double-air-duct air conditioner enters an ultra-low sensible heat high latent heat load area mode;
and step S104, when the double-air-channel air conditioner operates in an ultralow sensible heat and high latent heat load area mode, controlling the compressor of the double-air-channel air conditioner to operate at a low frequency, controlling the lower fan to continue to operate at a low wind gear, controlling the upper fan to stop operating or continue to operate at a low wind gear, and controlling the upper evaporator 3 to block the refrigerant so that the refrigerant passes through the
Therefore, by adopting the dehumidification method of the double-air-channel air conditioner provided by the embodiment of the invention, the evaporator is divided into two parts, no refrigerant flows through parts, and refrigerant passes through parts, so that the evaporation area of the evaporator is reduced, the temperature is reduced, the latent heat output when the compressor operates at low frequency is further improved, the sensible heat output is reduced, constant temperature dehumidification is realized, the normal dehumidification of the air conditioner in an ultralow sensible heat and high latent heat load area is effectively ensured, the room temperature is not reduced or slightly reduced, the air conditioner is suitable for the room load in more time periods in a refrigeration season, and the comfortable requirement of users can be controlled by the temperature and the humidity.
Based on the above embodiment, in order to adapt to the temperature change of the evaporator and make the air conditioning dehumidification capability more reliable and energy-saving in consideration of the influence of the rotation speed of the indoor fan on the temperature of the evaporator, the rotation speed R of the lower fan is changed according to the change of the difference Δ T (Δ T — Te) between the dew point temperature TL and the temperature Te of the
after the double-air-duct air conditioner operates in an ultralow sensible heat high latent heat load area mode for a time period of T1, when indoor relative humidity phi is larger than target relative humidity phi s, if delta T is within a preset threshold range, namely T2 is not less than delta T is not less than T1, the rotating speed R (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan, (n) if delta T is less than T2, the rotating speed R (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan, (n) minus the rotating speed delta R of preset gears of the lower fan, (n) if delta T is greater than T1, the rotating speed R (n +1) of the lower operating period of the lower fan is equal to the rotating speed R (n) of the upper operating period of the lower fan, (n) increases the rotating speed delta R of the lower fan by preset gears of the lower fan, and when the indoor relative humidity phi or less than the target humidity s, or equal to the rotating speed R (n +1) of the lower operating period of the lower fan is not less than the rotating speed R (n) of the lower 3970R, wherein the lower fan is greater than the lower fan, the lower fan rotational speed R (n) is equal to the lower rotational speed R2 rotational speed R (n) of the lower rotational speed R.
, the double-air-duct air conditioner detects the indoor environment temperature Tin and the indoor relative humidity phi for times every time T2 runs in an ultra-low sensible heat and high latent heat load area mode, automatically corrects according to an indoor environment temperature-indoor relative humidity-dew point temperature comparison table in the system to obtain a new dew point temperature TL, calculates delta T, and continuously confirms the rotating speed of the new lower fan, wherein T2 is more than or equal to 0.5 min.
It should be noted that the rule for obtaining the dew point temperature TL is: if the detected indoor environment temperature is a non-integer, taking the integer after the current indoor environment temperature is plus 0.5 ℃ as the indoor environment temperature of the indoor environment temperature-indoor relative humidity-dew point temperature comparison table, and if the detected indoor relative humidity is a non-integer, taking the integer multiple of 5% after the current indoor relative humidity is plus 2.5% as the indoor relative humidity of the indoor environment temperature-indoor relative humidity-dew point temperature comparison table. See in particular table 1 below:
indoor environment temperature-indoor relative humidity-dew point temperature comparison table (relative humidity unit%, indoor temperature, dew point temperature unit degree C.)
, as shown in fig. 3, an upper electric heater 5 is arranged on the upper air duct 1, a lower electric heater 6 is arranged on the lower air duct 2, when the dual-air-duct air conditioner continuously operates in an ultra-low sensible heat and high latent heat load area mode, if a target temperature difference E is less than or equal to a second preset temperature difference E2, or two of the upper electric heater 5 and the lower electric heater 6 are turned on to generate heat, so as to counteract the output of sensible heat (cold) of the air conditioner and prevent the indoor temperature from being too low, wherein the temperature of 2 ℃ is more than or equal to E1 and more than or equal to E2 and more than-3 ℃.
It should be noted that, when the upper electric heater 5 is turned on, the upper fan is synchronously turned on to prevent the electric heating from dry burning.
, the frequency F of the compressor of the double-air-duct air conditioner is in positive and strong correlation with the target temperature difference E, the larger the value E is, the higher the value F is, the minimum value of the frequency F of the compressor is Fmin, the maximum value is N% ＊ Fmax, and the frequency F dynamically changes according to the change of the value E, wherein N is less than or equal to 40, N% ＊ Fmax also belongs to the low-frequency interval of the compressor, Fmin is the minimum frequency of reliable operation of the compressor, and Fmax is the maximum frequency of reliable operation of the compressor.
The following describes the dehumidification method of the dual duct air conditioner in detail by using two examples:
example :
when the air conditioner refrigerates and operates at the automatic wind speed or in a dehumidifying mode, the indoor environment temperature Tin is as follows: 25.5 ℃, 92% indoor relative humidity phi, 25% target temperature Ts, 50% target relative humidity phi s (default 65% if the target relative humidity cannot be set), 10rpm Δ R, 10 ℃ T1, 5 ℃ T2, 0.5 ℃ E1, 1.0 ℃ E2, and 100rpm as the lowest reliable operation speed of the indoor fan of the air conditioner. And at the moment, the target temperature difference E is 25.5-Ts, 0.5-0.5 ℃ or less (E1), and phi is 92% to more than 70% (phi 1), so that the air conditioner enters a dehumidification mode of the ultralow sensible heat high latent heat load area.
Indoor set: the lower fan takes a low wind gear as an initial rotating speed, such as 800rpm of low wind. The upper fan is operated at a low wind gear, the electromagnetic valve on the upper evaporator 3 is closed, the refrigerant can not pass through the upper evaporator 3 and can only pass through the
After several minutes, the detected indoor ambient temperature Tin is 23.5 ℃, the indoor relative humidity phi is 75%, at this time the target temperature difference E-Tin-Ts is 23.5 ℃ -25 ℃ -1.5 ℃ < -1.0 ℃ (E2), the upper electric heater 5 and the lower electric heater 6 are turned on simultaneously.
An outdoor unit: when E is 0.5 ℃, the compressor is operated at 25 Hz; e0.0 ℃, compressor operating at 20 Hz; e ═ 0.5 ℃, compressor operated at 15 Hz; e ═ 1 ℃, the compressor is run at Fmin, e.g. 6 Hz.
Example two:
when the air conditioner refrigerates and operates at the automatic wind speed or in a dehumidifying mode, the indoor environment temperature Tin is as follows: 25.5 ℃, 85% indoor relative humidity phi, 25% target temperature Ts, 60% target relative humidity phi s (if relative humidity cannot be set, 65% is default), 10rpm Δ R, 10 ℃ T1, 5 ℃ T2, 0.5 ℃ E1, 1.0 ℃ E2, and 100rpm is the lowest reliable operation speed of the motor in the air-conditioning room. And at the moment, the target temperature difference E is 25.5-Ts, 0.5-0.5 ℃ (E1), phi-phi s is 85-60% and more than 10% (phi 2), and the air conditioner enters a dehumidification mode of the low-sensible-heat high-latent-heat load area.
Indoor set: the lower fan takes a low wind gear as an initial rotating speed, such as 800rpm of low wind. The upper fan is stopped, the solenoid valve of the upper evaporator 3 is closed, the refrigerant cannot pass through the upper evaporator 3, but only passes through the
After several minutes, the detected indoor environment temperature Tin is 23.5 ℃, the indoor relative humidity phi is 75%, at this time, the temperature difference E is set to be 23.5-Ts, 23.5-25 ℃, 1.5 ℃ and less than 1.0 ℃ (E2), the upper electric heater 5 and the lower electric heater 6 are simultaneously started, and the stopped upper fan is synchronously started.
An outdoor unit: when E is 0.5 ℃, the compressor is operated at 25 Hz; e0.0 ℃, compressor operating at 20 Hz; e ═ 0.5 ℃, compressor operated at 15 Hz; e ═ 1 ℃, the compressor is run at Fmin, e.g. 6 Hz.
Based on the dehumidification method of the dual-duct air conditioner, the embodiment of the invention further provides dehumidification systems of dual-duct air conditioners, as shown in fig. 5, which include an obtaining
The system comprises an acquisition module 201, a judgment module 202, a control module 203 and a control module, wherein the acquisition module 201 is used for acquiring a target temperature Ts and a target relative humidity φ s set by a user and acquiring an indoor environment temperature Tin and an indoor relative humidity φ in real time, the judgment module 202 is used for judging whether a dual-air-channel air conditioner meets a parameter condition required for entering an ultra-low sensible heat high latent heat load area mode or not, the parameter condition is that a target temperature difference E between the target temperature Ts and the indoor environment temperature Tin is smaller than or equal to a preset temperature difference E1, and meanwhile, whether an indoor relative humidity φ is larger than or equal to a preset relative humidity φ 1 or a difference value delta φ between the indoor relative humidity and the target relative humidity φ s is larger than or equal to a preset relative humidity difference 2, wherein 2 ℃ is not less than E1 > -3 ℃, 100% φ 1 not less than or not less than 70%, 50% φ 2 not less than 10%, the control module 203 is used for controlling a compressor of the dual-air conditioner to operate at a low frequency and controlling an upper fan to operate to continue to control an upper fan to operate and to continue to pass through a low-sensible heat evaporator or an upper evaporator.
Therefore, by adopting the dehumidification system of the dual-air-channel air conditioner provided by the embodiment of the invention, the target temperature Ts and the target relative humidity φ s set by a user are obtained through the obtaining module 201, the indoor environment temperature Tin and the indoor relative humidity φ are obtained in real time, the judgment module 202 judges that the target temperature difference E is less than or equal to the preset temperature difference E1, the indoor relative humidity φ is greater than or equal to the preset relative humidity φ 1 or the difference Delta φ between the indoor relative humidity φ and the target relative humidity φ s is greater than or equal to the preset relative humidity difference φ 2, the control module 203 controls the air conditioner to be switched to the ultra-low sensible heat high latent heat load area mode, when the air conditioner operates in the ultra-low sensible heat high latent heat load area mode, the compressor of the dual-air-channel air conditioner is controlled to operate at a low wind gear, the upper fan is controlled to stop operating or continue operating at the low wind gear, the upper evaporator 3 is controlled to block off the refrigerant, the refrigerant passes through the lower evaporator 4, namely, the evaporation area of the evaporator is reduced, the temperature is further improved, the output of the constant temperature and the sensible heat output is reduced, the sensible heat output of the room, the sensible heat output of the air conditioner, the sensible heat output of the room is reduced, the sensible heat control system is reduced, the sensible heat of the room.
Based on the above embodiment, in order to adapt to the temperature change of the evaporator and make the dehumidification capability of the air conditioner more reliable and energy-saving in consideration of the influence of the rotating speed of the indoor fan on the temperature of the evaporator, the arrangement of the obtaining
the obtaining module 201 is further configured to determine whether the lower fan meets a second parameter condition required for keeping the rotation speed unchanged, determine whether the lower fan meets a third parameter condition required for reducing the rotation speed, and determine whether the lower fan meets a fourth parameter condition required for increasing the rotation speed, where the second parameter condition is that after the dual air conditioner operates in the ultra-low sensible heat high latent heat load area dehumidification mode for a time period of T1, the indoor relative humidity Φ is less than or equal to the target relative humidity Φ s, or the indoor relative humidity Φ is greater than the target relative humidity Φ s, and a difference Δ T between the dew point temperature TL and the temperature Te of the lower evaporator 4 is within a preset threshold range, that is, T2 is less than or equal to Δ T and is less than or equal to T1; the third parameter condition is that after the double-air-duct air conditioner operates in a dehumidification mode of an ultralow sensible heat and high latent heat load area for a time period of T1, the indoor relative humidity phi is greater than the target relative humidity phi s, and the difference delta T between the dew point temperature TL and the temperature Te of the lower evaporator 4 is less than T2; and the fourth parameter condition is that after the double-air-duct air conditioner operates in the dehumidification mode of the ultralow sensible heat and high latent heat load area for a time period of T1, the indoor relative humidity phi is greater than the target relative humidity phi s, and the difference value delta T between the dew point temperature TL and the temperature Te of the lower evaporator 4 is greater than T1.
The
Wherein the temperature is more than or equal to 20 ℃ and more than or equal to T1 and more than or equal to T2 and more than or equal to 0 ℃, T1 and more than or equal to 0.5min, the delta R is more than or equal to 1rpm, the upper limit value of the R is the low-wind gear rotating speed of the fan, and the lower limit value of the R is the lowest rotating speed of the fan in reliable operation.
For example, in order to prevent the indoor temperature from being too low, the upper air duct 1 is provided with an upper electric heater 5, and the lower air duct 2 is provided with a lower electric heater 6. Accordingly, the settings of the judging
the determining
It should be noted that, when the upper electric heater 5 is turned on, the upper fan is synchronously turned on to prevent the electric heating from dry burning.
Based on the application of the dehumidification system of the dual air duct air conditioner in the dual air duct air conditioner, an embodiment of the present invention provides dual air duct air conditioners, which include the dehumidification system of the dual air duct air conditioner described in the above items, wherein, as shown in fig. 3, the indoor unit of the dual air duct air conditioner further includes a humidity sensor for detecting indoor relative humidity, a th temperature sensor for detecting indoor ambient temperature, a second temperature sensor 7 for detecting temperature of the
Illustratively, a partition plate 9 is arranged between the upper air duct 1 and the lower air duct 2 to prevent air from leaking between the two air ducts.
Illustratively, the total inlet of the upper evaporator 3 and the total inlet of the
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
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