CN113175741B - Dehumidification and cooling method for central air conditioner tail end heat exchanger - Google Patents
Dehumidification and cooling method for central air conditioner tail end heat exchanger Download PDFInfo
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- CN113175741B CN113175741B CN202110482941.3A CN202110482941A CN113175741B CN 113175741 B CN113175741 B CN 113175741B CN 202110482941 A CN202110482941 A CN 202110482941A CN 113175741 B CN113175741 B CN 113175741B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention relates to a dehumidification and cooling method for a central air-conditioning tail end heat exchanger, which comprises the following steps: acquiring the temperature and the flow of chilled water in a tail end heat exchanger, the heat exchange area of the heat exchanger, the ambient temperature and the ambient humidity; determining the required dewing time and the corresponding wind speed of the tail end heat exchanger based on the difference value between the temperature of the chilled water in the tail end heat exchanger and the ambient temperature, the area of the tail end heat exchanger and the ambient humidity; based on the condensation time and the wind speed of the tail end heat exchanger, the current fan speed of the tail end heat exchanger is subjected to stepless speed regulation to reach the corresponding wind speed meeting the condensation time to perform dehumidification by using the preset stepping wind speed in the condensation time of the tail end heat exchanger on the basis of the current fan speed. Through the refrigerated water temperature who obtains central air conditioning end heat exchanger, heat transfer area, ambient temperature, the ambient humidity of end heat exchanger through the temperature variation between ambient temperature and the refrigerated water temperature, carry out infinitely variable to end heat exchanger fan, wind speed dewfall dehumidification when satisfying the dew point, can reach the best dehumidification effect.
Description
Technical Field
The invention belongs to the technical field of central air conditioners, and particularly relates to a dehumidification and cooling method for a central air conditioner tail end heat exchanger.
Background
The existing central air conditioner usually adopts a tail end heat exchanger to suck indoor air from an air inlet by using a fan, then the air heated or cooled by heat exchange of the heat exchanger in the tail end heat exchanger is sent out from an air outlet, a coil pipe is arranged in the tail end heat exchanger of the central air conditioner, chilled water circulating liquid flows in the coil pipe, fins are arranged on the coil pipe, indoor higher-temperature air sucked by the fan is contacted with the fins to carry out temperature exchange, and the temperature rise and the temperature drop of the air are adjusted. Because the air current passes through the fins at high speed and condensation cannot be formed, the central air-conditioning tail end heat exchanger generally only has an air temperature adjusting function and cannot adjust the humidity. When the temperature rise or the temperature drop of the central air-conditioning tail end heat exchanger contains a large amount of latent heat and high humidity air, a large amount of energy is wasted and the moderate degree is not good.
Disclosure of Invention
The invention provides a dehumidification and cooling method of a central air-conditioning end heat exchanger, which aims to solve the problems that the conventional central air-conditioning end heat exchanger can only raise temperature and cool air and cannot effectively remove high humidity and high temperature in the air with low energy consumption.
According to the specific embodiment of the invention, the dehumidification and cooling method of the central air-conditioning end heat exchanger comprises the following steps:
acquiring the temperature and the flow of chilled water in a tail end heat exchanger, the heat exchange area of the heat exchanger, the ambient temperature and the ambient humidity;
determining the required dewing time and the corresponding wind speed of the tail end heat exchanger based on the difference value between the temperature of the chilled water in the tail end heat exchanger and the ambient temperature, the area of the tail end heat exchanger and the ambient humidity;
based on the condensation time and the wind speed of the tail end heat exchanger, the current fan speed of the tail end heat exchanger is subjected to stepless speed regulation to reach the corresponding wind speed meeting the condensation time to perform dehumidification by using the preset stepping wind speed in the condensation time of the tail end heat exchanger on the basis of the current fan speed.
Further, still include:
and the current wind speed is steplessly changed to the wind speed meeting the dehumidification requirement through a heat exchanger fan at the upper end of the central air conditioner for dehumidification.
Further, the preset dehumidification humidity set by the user is obtained, whether the environment humidity is smaller than the preset dehumidification humidity is judged based on the preset dehumidification humidity, and if the environment humidity is larger than the preset dehumidification humidity, the wind speed operation from the stepless wind speed regulation to the dehumidification requirement is carried out in the dehumidification mode.
Further, the preset stepping wind speed is adjusted by ascending or descending the wind speed step by step.
Further, the wind speed of the current wind speed stepless adjustment fan is used as the wind speed required by meeting the condensation time of the tail end heat exchanger after rising or falling.
Further, the method also comprises the step of setting the preset humidity as the humidity requirement set by a client.
Further, the terminal heat exchange area is the total area of the heat exchange fins on the terminal heat exchanger.
Further, the step-by-step changing the current wind speed of the fan to the wind speed at which the wind speed meets the dehumidification requirement in a stepless manner within the condensation time of the tail end heat exchanger based on the current wind speed comprises the following steps:
and the current wind speed is steplessly converted to the wind speed meeting the dewing time for dehumidification through stepless speed regulation of a fan on heat exchange equipment at the tail end of the central air conditioner.
Further, the determining a coil dewing time and a corresponding wind speed based on the difference between the chilled water temperature and the ambient temperature, the coil heat exchange area, and the ambient humidity comprises:
and determining the dewing time of the coil pipe based on the difference and the change of the environmental humidity along with the time, and determining the corresponding wind speed for dehumidification based on the heat exchange area of the coil pipe.
The invention has the beneficial effects that: the temperature of the refrigerated water through obtaining the terminal heat exchanger coil pipe of central air conditioning, the heat transfer area of coil pipe, ambient temperature, ambient humidity, through the temperature variation condition between ambient temperature and the refrigerated water temperature, can calculate the time of dewing and the maximum value of the wind speed of corresponding operation, carry out infinitely variable speed adjustment wind speed when reaching the dew point, reach the quick dewing dehumidification of maximum wind speed in time when reaching the dew point, can reach the best dehumidification effect, the efficient energy-saving that the dehumidification effect is more.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a central air conditioning end heat exchanger dehumidification and cooling method provided in accordance with an exemplary embodiment;
FIG. 2 is another flow chart of a central air conditioning end heat exchanger dehumidification and cooling method provided according to an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a dehumidification and temperature reduction method for a central air-conditioning end heat exchanger, which specifically includes:
a dehumidification and cooling method for a heat exchanger at the tail end of a central air conditioner is characterized by comprising the following steps:
101. acquiring the temperature and the flow of chilled water in a tail end heat exchanger, the heat exchange area of the heat exchanger, the ambient temperature and the ambient humidity;
the accessible sets up in the numerical value of the temperature sensor and the humidity transducer or temperature and humidity transducer of relevant position and acquireing corresponding temperature and humidity, because the principle of the terminal heat exchanger's of ordinary central air conditioning temperature of work is based on the refrigerated water in the coil pipe equally and the temperature of the environment that needs the cooling carries out automatic refrigeration, can be automatic with ambient temperature with fall to the temperature that the user set for after the start-up, play cryogenic effect, and the length of refrigeration heat transfer time has just been decided to the heat transfer area of coil pipe, and humidity in the environment also can influence the effect of cooling.
102. Determining the required dewing time and the corresponding wind speed of the tail end heat exchanger based on the difference value between the temperature of the chilled water in the tail end heat exchanger and the ambient temperature, the area of the tail end heat exchanger and the ambient humidity;
when the central air-conditioning terminal heat exchanger automatically operates, the room temperature is reduced to the temperature close to chilled water through heat exchange, the difference value between the environment temperature and the chilled water temperature is continuously changed in the process, the environment humidity is gradually changed along with the change of the environment temperature, the moisture in the air can reach the condensation moment at a certain time point according to the difference of heat exchange areas and the difference of boundary conditions of a refrigeration environment, and at the moment, the air-conditioning terminal heat exchanger operates at the air speed meeting the condensation condition to achieve a good dehumidification effect.
103. Based on the condensation time and the wind speed of the tail end heat exchanger, the current wind speed of the tail end heat exchanger is subjected to stepless speed regulation to reach the corresponding wind speed meeting the condensation time to perform dehumidification at the preset stepping wind speed in the condensation time of the tail end heat exchanger on the basis of the current wind speed of the fan.
Preferably, the speed can be adjusted by adopting a mode of stepless adjustment of the wind speed when the dew formation time point is reached, so that the effect of adjusting the wind speed required by the dew formation in a stepless speed change manner of the fan is realized, a good dehumidification effect is achieved, a better refrigeration effect can be achieved, and better user experience is provided.
Specifically, under the condition that the water vapor content in the air is unchanged and the air pressure is kept to be constant, the temperature when the air is cooled to reach saturation is called dew point temperature, namely dew point, the unit of the dew point temperature is the same as the air temperature, when the air conditioner is operated and the volume of an environment space needing to be refrigerated is determined, the room temperature is reduced to the temperature set by a user, the required operation time is determined under the condition that the air speed is constant, the humidity of the environment is changed along with the change of the room temperature, so that the dewing time of the air conditioner is constant, the time of the air conditioner to reach the dewing point can be determined by obtaining the temperature difference of the environment, the temperature difference to be refrigerated and the heat exchange area of a coil, then the time is increased in a stepping mode at the preset air speed within the time range of reaching the dewing point, and the dehumidification is carried out just to the maximum air speed after the time of the dewing point is reached, so that the dehumidification effect is best, High efficiency and very obvious cooling effect.
In another embodiment of the present invention, the method further comprises the following steps:
201. acquiring the temperature and the flow of chilled water in a tail end heat exchanger, the heat exchange area of the heat exchanger, the ambient temperature and the ambient humidity;
202. determining the required dewing time and the corresponding wind speed of the tail end heat exchanger based on the difference value between the temperature of the chilled water in the tail end heat exchanger and the ambient temperature, the area of the tail end heat exchanger and the ambient humidity;
203. based on the condensation time and the wind speed of the tail end heat exchanger, the current fan speed of the tail end heat exchanger is subjected to stepless speed regulation to reach the corresponding wind speed meeting the condensation time to perform dehumidification by using the preset stepping wind speed in the condensation time of the tail end heat exchanger on the basis of the current fan speed.
204. And acquiring the preset dehumidification humidity set by the user.
205. And judging whether the environment humidity is smaller than the preset dehumidification humidity or not based on the preset dehumidification humidity, and if so, carrying out stepless wind speed regulation to the wind speed required by dehumidification in a dehumidification mode.
Compare in the mode of regulation of traditional high-middle-low third grade, the maximum wind speed that is higher than the dew point during low wind does not play the effect of dehumidification again, and through the mode of infinitely variable, judges whether ambient humidity is less than predetermine dehumidification humidity, if be greater than predetermine dehumidification humidity then carry out the wind speed operation of infinitely variable speed wind speed to dehumidification needs with the dehumidification mode, can play the optimal dehumidification effect.
As a feasible implementation manner of the embodiment, the dewing time of the coil is determined based on the difference and the change of the environmental humidity along with the time, and the corresponding maximum wind speed is determined based on the heat exchange area of the coil for dehumidification. The heat exchange area can be understood as the heat exchange area of the coil pipe fins, the temperature of the chilled water is T1, the heat exchange area is S, the ambient temperature is T2, the ambient humidity is RH, generally 50% -70% can be achieved, the temperature difference is T2-T1, the maximum value of the condensation time H and the maximum value of the wind speed S can be judged through the change of the delta T and the ambient humidity RH, and then the air conditioner runs at the maximum wind speed of the condensation point, and the obvious condensation effect can be achieved.
The preset stepping wind speed takes 5 percent as stepping to gradually adjust the rising of the wind speed. Namely 5% -10% -15% -20% of wind speed.
The preset humidity may be set to 50% -70%, and the maximum wind speed is stepped down to the current wind speed by a preset step wind speed when the ambient humidity is 75%. The stepless speed change can be used for adjusting the wind speed by changing the current wind speed to the maximum wind speed through a fan motor on a heat exchanger at the tail end of the central air conditioner for dehumidification.
According to the dehumidification and cooling method for the central air-conditioning terminal heat exchanger provided by the embodiment of the invention, the temperature of the chilled water of the coil pipe of the central air-conditioning terminal heat exchanger, the heat exchange area of the coil pipe, the ambient temperature and the ambient humidity are obtained, and the maximum value of the dewing time and the corresponding running wind speed can be determined according to the temperature change condition between the ambient temperature and the chilled water temperature, so that the stepless speed change wind adjustment is carried out when the dewing point is reached, the maximum wind speed is just reached for fast dewing and dehumidification when the dewing point is reached, the optimal dehumidification effect can be achieved, and the dehumidification effect is more efficient and energy-saving.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A dehumidification and cooling method for a heat exchanger at the tail end of a central air conditioner is characterized by comprising the following steps:
acquiring the temperature and the flow of chilled water in a tail end heat exchanger, the heat exchange area of the heat exchanger, the ambient temperature and the ambient humidity;
the required dewing time of terminal heat exchanger and the corresponding wind speed that satisfies the dewing time are confirmed based on difference, terminal heat exchanger area and the ambient temperature of freezing water temperature and ambient temperature in the terminal heat exchanger, include: determining the dewing time of the tail end heat exchanger based on the difference and the change of the environmental humidity along with the time, and determining the corresponding wind speed for dehumidification based on the heat exchange area of the tail end heat exchanger;
based on the condensation time and the wind speed of the tail end heat exchanger, the current wind speed of the tail end heat exchanger is subjected to stepless speed regulation to reach the corresponding wind speed meeting the condensation time to perform dehumidification at the preset stepping wind speed in the condensation time of the tail end heat exchanger on the basis of the current wind speed of the fan.
2. The dehumidification and cooling method for the tail end heat exchanger of the central air conditioner as claimed in claim 1, further comprising:
the method comprises the steps of obtaining preset dehumidification humidity set by a user, judging whether environment humidity is smaller than the preset dehumidification humidity based on the preset dehumidification humidity, and if the environment humidity is larger than the preset dehumidification humidity, carrying out stepless wind speed regulation to wind speed operation required by dehumidification in a dehumidification mode.
3. The dehumidification and cooling method for the end heat exchanger of the central air conditioner as claimed in claim 1, wherein the preset step wind speed is adjusted by increasing or decreasing the wind speed step by step.
4. The dehumidification and cooling method for the end heat exchanger of the central air conditioner as claimed in claim 3, wherein the current wind speed of the fan is used for steplessly adjusting the wind speed of the fan to increase or decrease to be the wind speed required for meeting the dewing time of the end heat exchanger.
5. The method for dehumidifying and cooling an end heat exchanger of a central air conditioner according to claim 2, wherein the preset dehumidifying humidity is a humidity requirement set by a customer.
6. The method for dehumidifying and cooling a terminal heat exchanger of a central air conditioner as claimed in claim 1, wherein the area of the terminal heat exchanger is a total area of heat exchange fins on the terminal heat exchanger.
7. The central air-conditioning terminal heat exchanger dehumidification and cooling method according to claim 1, wherein the step of steplessly changing the current fan wind speed to the wind speed meeting the dehumidification requirement within the condensation time of the terminal heat exchanger by a preset step wind speed based on the current fan wind speed comprises the steps of:
and the air speed of the existing fan is steplessly changed to the air speed meeting the dehumidification requirement through a heat exchanger fan at the upper end of the central air conditioner for dehumidification.
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| CN114659304B (en) * | 2022-03-25 | 2024-03-19 | 青岛海尔空调器有限总公司 | Control method and control system for dehumidification of air conditioner, electronic equipment and storage medium |
| CN117128183B (en) * | 2023-08-30 | 2024-06-07 | 广州广钢气体能源股份有限公司 | Circulating fan control method and device based on air separation system |
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| CN102937308A (en) * | 2012-11-14 | 2013-02-20 | 合肥天鹅制冷科技有限公司 | Dehumidification air conditioner capable of supplying air with multiple temperature parameters |
| CN104566835B (en) * | 2015-01-27 | 2018-04-17 | 珠海格力电器股份有限公司 | Control method and system for preventing condensation of chilled water type air conditioner |
| CN107062539B (en) * | 2017-03-30 | 2019-09-20 | 海信家电集团股份有限公司 | Humidity control method and device for air conditioner |
| CN107525244B (en) * | 2017-08-28 | 2020-02-11 | 广东美的暖通设备有限公司 | Air speed control method of air conditioner, air conditioner and storage medium |
| CN108119989B (en) * | 2017-12-07 | 2020-06-05 | 广东美的制冷设备有限公司 | Air conditioner and control method and device thereof |
| CN108361895A (en) * | 2018-05-11 | 2018-08-03 | 青岛联盛创能源科技有限公司 | A kind of intelligent cooling tower using EC wind turbines |
| CN211177259U (en) * | 2019-12-27 | 2020-08-04 | 广州国灵空调有限公司 | Energy-saving terminal energy-saving air conditioning unit |
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Effective date of registration: 20230505 Address after: 100071 102-01, Block E, 133 meishikou Road, Xiaotun village, Fengtai District, Beijing Patentee after: Sida Xinneng (Beijing) energy saving Technology Co.,Ltd. Address before: 101113 No. 101, 1st floor, building 18, yard 2, Yunshan Road, Tongzhou District, Beijing Patentee before: Zhongsida (Beijing) energy saving Technology Co.,Ltd. |