CN111780346B - Air conditioner heat exchange efficiency control method and air conditioner - Google Patents
Air conditioner heat exchange efficiency control method and air conditioner Download PDFInfo
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- CN111780346B CN111780346B CN202010500907.XA CN202010500907A CN111780346B CN 111780346 B CN111780346 B CN 111780346B CN 202010500907 A CN202010500907 A CN 202010500907A CN 111780346 B CN111780346 B CN 111780346B
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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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/62—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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a method for controlling the heat exchange efficiency of an air conditioner, which comprises the following steps: when the air conditioner is in a heating mode, acquiring the temperature of a frosting area, the outdoor environment temperature and the actual operation frequency of a compressor of the air conditioner in real time; determining the time for sampling the operating power of the air conditioner according to the temperature of the frosting area and the outdoor environment temperature, acquiring the initial operating power of the air conditioner, and calculating the operating power of the air conditioner at the next sampling time according to a preset sampling period; adjusting the current actual operating frequency of the compressor according to the operating power of the air conditioner at two adjacent sampling moments to obtain a target operating frequency, and controlling the compressor to operate at the target operating frequency; the invention samples the running power of the air conditioner and adjusts the current actual running frequency of the compressor according to the running power, thereby realizing the purpose of improving the heat exchange efficiency of the outdoor heat exchanger when frosting outdoors, increasing the indoor heating capacity, improving the practicability of the air conditioner and improving the user experience.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a heat exchange efficiency control method thereof.
Background
For domestic variable frequency air conditioner, when the air conditioner was operated at the heating, outdoor can be because of the reason of comdenstion water, when being less than zero degree, the phenomenon that outdoor heat exchanger frosted can appear, and long-time frosting can influence outdoor heat transfer, leads to heat transfer volume to descend and the air-out temperature reduces for user experience worsens.
Because the frequency conversion room air conditioner causes the outdoor heat exchanger to frost after outdoor frosting, leads to the heat transfer to descend, can make the coil pipe temperature descend, and the traditional approach judges the condition that gets into the defrosting through the decline volume of judging outdoor coil pipe temperature or the difference of ambient temperature and coil pipe temperature, but in the later stage that frosts, indoor heating capacity and air-out temperature all can descend more obviously, and power also has great decline, can't improve the heat transfer effect.
Therefore, an urgent need exists in the market at present for an air conditioner heat exchange efficiency control strategy, which can improve the heat exchange efficiency of the outdoor heat exchanger when frosting outdoors, so that the indoor heating capacity is increased, the practicability of the air conditioner is improved, and the user experience is improved.
Disclosure of Invention
The invention provides a method for controlling the heat exchange efficiency of an air conditioner, which can improve the heat exchange efficiency of an outdoor heat exchanger when outdoor frosting occurs, so that the indoor heating capacity is increased, the practicability of the air conditioner is improved, and the user experience is improved.
In order to solve the above technical problem, an embodiment of the present invention provides a method for controlling heat exchange efficiency of an air conditioner, including:
when the air conditioner is in a heating mode, acquiring the temperature of a frosting area, the outdoor environment temperature and the actual operation frequency of a compressor of the air conditioner in real time;
determining the time for sampling the operating power of the air conditioner according to the temperature of the frosting area and the outdoor environment temperature, and calculating the operating power of the air conditioner at the next sampling time according to a preset sampling period;
and adjusting the current actual operating frequency of the compressor according to the operating power of the air conditioner at two adjacent sampling moments to obtain a target operating frequency, and controlling the compressor to operate at the target operating frequency.
As a preferred scheme, the step of acquiring the frosting area temperature, the outdoor environment temperature and the actual operation frequency of the compressor of the air conditioner in real time specifically comprises the following steps: and judging the continuous operation time of the compressor, and acquiring the frosting area temperature, the outdoor environment temperature and the actual operation frequency of the compressor in real time when the continuous operation time of the compressor reaches a first preset time threshold value.
As a preferred scheme, the step of determining the time at which the operating power of the air conditioner is sampled according to the frosting area temperature and the outdoor environment temperature specifically includes: and when the difference value between the outdoor environment temperature and the frosting area temperature is greater than or equal to a first preset temperature threshold value, and the frosting area temperature is less than or equal to a second preset temperature threshold value, sampling the running power of the air conditioner.
Preferably, the obtaining process of the operating power of the air conditioner is as follows: and acquiring the current voltage value and current value of the air conditioner, and calculating the product of the voltage value and the current value to obtain the operating power of the air conditioner.
As a preferable scheme, the step of adjusting the current actual operating frequency of the compressor according to the operating powers of the air conditioner at two adjacent sampling moments to obtain the target operating frequency specifically includes:
calculating the difference value between the running power of the air conditioner at two adjacent sampling moments;
when the difference value is smaller than or equal to a first preset power threshold value, taking the current actual operating frequency of the compressor as a target operating frequency;
when the difference is greater than a first preset power threshold and the difference is less than or equal to a second preset power threshold, increasing a first frequency quantity to the current actual operating frequency of the compressor, and taking the adjusted operating frequency as a target operating frequency;
and when the difference is greater than a second preset power threshold value, increasing a second frequency quantity to the current actual operating frequency of the compressor, and taking the adjusted operating frequency as the target operating frequency.
Preferably, the second frequency amount is greater than the first frequency amount.
Preferably, the target operating frequency is less than or equal to a preset maximum frequency threshold.
As a preferable scheme, the method for controlling the heat exchange efficiency of the air conditioner further comprises the following steps: when the air conditioner enters a heating mode, the continuous operation time of the compressor is acquired in real time, and when the continuous operation time of the compressor is determined to exceed a second preset time threshold, the air conditioner is controlled to exit the heating mode and enter a defrosting mode.
Preferably, the frosting area is an outdoor coil pipe; the step of obtaining the temperature of the frosting area of the air conditioner specifically comprises the following steps: and acquiring a temperature value of an outdoor coil of the air conditioner, and taking the temperature value of the outdoor coil as a frosting area temperature value of the air conditioner.
The invention correspondingly provides an air conditioner, which comprises a memory, a processor and an air conditioner control program, wherein the air conditioner control program is stored on the memory and can run on the processor;
the air conditioner control program is executed by the processor to realize the steps of the air conditioner heat exchange efficiency control method.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
1. the invention provides a method for controlling the heat exchange efficiency of an air conditioner, which samples the running power of the air conditioner according to the temperature of a frosting area and the temperature of an outdoor environment and adjusts the current actual running frequency of a compressor according to the running power of two adjacent sampling points, thereby controlling the running frequency of the compressor, improving the heat exchange efficiency of an outdoor heat exchanger when frosting is carried out outdoors, increasing the indoor heating capacity, improving the practicability of the air conditioner and improving the user experience.
2. Before the actual running frequency of the compressor, the continuous running time of the compressor is judged, the heat exchange efficiency of the outdoor heat exchanger can be guaranteed to reach the peak value, the heating capacity of the outdoor heat exchanger is guaranteed to be reduced due to the frosting environment, the frequency control error is reduced, and the practicability is further improved.
3. The maximum continuous operation time of the compressor is controlled by setting the second preset time threshold value, so that the condition that the air conditioner frosts externally is prevented from being too serious, the air conditioner is controlled to enter a defrosting mode, and the normal and effective operation of the air conditioner is guaranteed.
Drawings
FIG. 1: the invention provides a flow chart diagram of an embodiment of the method for controlling the heat exchange efficiency of the air conditioner;
FIG. 2: the invention provides a flow chart diagram of another embodiment of the method for controlling the heat exchange efficiency of the air conditioner;
FIG. 3: the invention provides a schematic structural diagram of an embodiment of an air conditioner.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, a schematic flow chart of an embodiment of a method for controlling heat exchange efficiency of an air conditioner according to the present invention is shown, the method includes steps 101 to 103, and the steps are as follows:
In a preferred embodiment, the step of acquiring the frosting area temperature, the outdoor environment temperature and the actual operation frequency of the compressor of the air conditioner in real time specifically includes: and judging the continuous operation time of the compressor, and acquiring the frosting area temperature, the outdoor environment temperature and the actual operation frequency of the compressor in real time when the continuous operation time of the compressor reaches a first preset time threshold value. Wherein, the first preset time threshold may be 10 minutes; it should be noted that simple numerical changes are also within the scope of the present invention.
Specifically, before acquiring the frosting area temperature of the air conditioner, the outdoor environment temperature and the actual operation frequency of the compressor in real time, the continuous operation time of the compressor is judged, the heat exchange efficiency of the outdoor heat exchanger can be ensured to reach a peak value, the heating capacity reduction of the outdoor heat exchanger is ensured to be derived from the frosting environment, the frequency control error is reduced, and the practicability is further improved.
And step 102, determining the time for sampling the operating power of the air conditioner according to the temperature of the frosting area and the outdoor environment temperature, and calculating the operating power of the air conditioner at the next sampling time according to a preset sampling period. The preset sampling period may be 40 seconds, and it should be noted that a simple numerical change is also within the protection scope of the present invention.
In this embodiment, the step of determining the time at which the operating power of the air conditioner is sampled according to the frosting area temperature and the outdoor environment temperature specifically includes: and when the difference value between the outdoor environment temperature and the frosting area temperature is greater than or equal to a first preset temperature threshold value, and the frosting area temperature is less than or equal to a second preset temperature threshold value, sampling the running power of the air conditioner. Wherein the first preset temperature threshold is 8 ℃, and the second preset temperature threshold is-2 ℃; it should be noted that simple numerical changes are also within the scope of the present invention.
In this embodiment, the obtaining process of the operating power of the air conditioner is as follows: and collecting the current voltage value U and current value I of the air conditioner, and calculating the product of the voltage value and the current value, namely the power Q is U I, so as to obtain the operating power of the air conditioner.
Specifically, when the difference between the outdoor environment temperature and the frosting area temperature is determined to be more than or equal to 8 ℃ and the frosting area temperature is determined to be less than or equal to-2 ℃, the actual running frequency at the moment is recorded, the electric parameter voltage U and the current I measured by the variable frequency controller are used for calculating the power Q which is U I at the moment and is used as the initial power QInitial. The power values are then calculated according to a preset sampling period of 40 seconds, i.e. every 40 seconds apart: qInitial、Q1、……Qn-1、Qn。
And 103, adjusting the current actual operating frequency of the compressor according to the operating power of the air conditioner at two adjacent sampling moments to obtain a target operating frequency, and controlling the compressor to operate at the target operating frequency. In this embodiment, the second frequency amount is greater than the first frequency amount. The method specifically comprises the following steps:
calculating the difference value between the running power of the air conditioner at two adjacent sampling moments; that is, Δ Q ═ Qn-Qn-1。
When the difference value is smaller than or equal to a first preset power threshold value, taking the current actual operating frequency of the compressor as a target operating frequency; the first preset power threshold is 20Hz, and it should be noted that a simple numerical change is also within the protection scope of the present invention. Specifically, when Δ Q ≦ 20Hz, the target operating frequency is the current actual operating frequency.
When the difference is greater than a first preset power threshold and the difference is less than or equal to a second preset power threshold, increasing a first frequency quantity to the current actual operating frequency of the compressor, and taking the adjusted operating frequency as a target operating frequency; wherein the second preset power threshold is 40Hz, and the first frequency quantity is 3 Hz; it should be noted that simple numerical changes are also within the scope of the present invention. Specifically, when 20Hz < DeltaQis less than or equal to 40Hz, the target operation frequency is equal to the current actual operation frequency +3 Hz.
And when the difference is greater than a second preset power threshold value, increasing a second frequency quantity to the current actual operating frequency of the compressor, and taking the adjusted operating frequency as the target operating frequency. Wherein the second frequency amount is 5 Hz; it should be noted that simple numerical changes are also within the scope of the present invention. Specifically, when Δ Q >40Hz, the target operating frequency is the current actual operating frequency +5 Hz.
In another embodiment, the target operating frequency is less than or equal to a preset maximum frequency threshold in order to ensure that the compressor operates within an acceptable range, ensuring that the compressor is not damaged. That is, the operating frequency of the compressor is subject to the maximum operating frequency FmaxIs not allowed to exceed Fmax。
Therefore, the invention provides a method for controlling the heat exchange efficiency of an air conditioner, which samples the running power of the air conditioner according to the temperature of a frosting area and the temperature of the outdoor environment, and adjusts the current actual running frequency of a compressor according to the running power of two adjacent sampling points, thereby controlling the running frequency of the compressor, improving the heat exchange efficiency of an outdoor heat exchanger when frosting is carried out outdoors, increasing the indoor heating capacity, improving the practicability of the air conditioner and improving the user experience.
Example 2
Referring to fig. 2, a schematic flow chart of another embodiment of a method for controlling heat exchange efficiency of an air conditioner according to the present invention is shown, where the areas of the embodiment 2 and the embodiment 1 are that the method for controlling heat exchange efficiency of an air conditioner further includes: and 204, acquiring the continuous operation time of the compressor in real time when the air conditioner enters a heating mode, and controlling the air conditioner to exit the heating mode and enter a defrosting mode when the continuous operation time of the compressor is determined to exceed a second preset time threshold.
Wherein the second preset time threshold is 60 minutes; it should be noted that simple numerical changes are also within the scope of the present invention. That is, when the compressor continuous operation time exceeds 60 minutes, the defrost control is entered.
Specifically, the maximum continuous operation time of the compressor is controlled by setting a second preset time threshold value, so that the condition that the air conditioner frosts externally is prevented from being too serious, the air conditioner is controlled to enter a defrosting mode, and the normal and effective operation of the air conditioner is guaranteed.
It should be noted that in any of the above embodiments, the frosting zone is an outdoor coil; the step of obtaining the temperature of the frosting area of the air conditioner specifically comprises the following steps: and acquiring a temperature value of an outdoor coil of the air conditioner, and taking the temperature value of the outdoor coil as a frosting area temperature value of the air conditioner.
Example 3
Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of an air conditioner provided in the present invention. The air conditioner comprises a memory 302, a processor 301 and an air conditioner control program which is stored on the memory and can run on the processor; wherein the memory 302 is connected with the processor 301;
the air conditioner control program is executed by the processor to realize the steps of the air conditioner heat exchange efficiency control method.
Compared with the air conditioner in the prior art, the air conditioner provided by the invention has the advantages that the heat exchange efficiency of the outdoor heat exchanger can be improved when frost is formed outdoors by executing the air conditioner control program running on the processor, so that the indoor heating capacity is increased, the practicability of the air conditioner is improved, and the user experience is improved.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.
Claims (7)
1. A method for controlling heat exchange efficiency of an air conditioner is characterized by comprising the following steps:
when the air conditioner is in a heating mode, acquiring the temperature of a frosting area, the outdoor environment temperature and the actual operation frequency of a compressor of the air conditioner in real time;
determining the time for sampling the operating power of the air conditioner according to the temperature of the frosting area and the outdoor environment temperature, acquiring the initial operating power of the air conditioner, and calculating the operating power of the air conditioner at the next sampling time according to a preset sampling period; the step of determining the time for sampling the operating power of the air conditioner according to the frosting area temperature and the outdoor environment temperature specifically comprises the following steps: when the difference value between the outdoor environment temperature and the frosting area temperature is larger than or equal to a first preset temperature threshold value, and the frosting area temperature is smaller than or equal to a second preset temperature threshold value, sampling the running power of the air conditioner;
adjusting the current actual operating frequency of the compressor according to the operating power of the air conditioner at two adjacent sampling moments to obtain a target operating frequency, and controlling the compressor to operate at the target operating frequency;
the step of adjusting the current actual operating frequency of the compressor according to the operating power of the air conditioner at two adjacent sampling moments to obtain the target operating frequency specifically comprises the following steps:
calculating the difference value between the running power of the air conditioner at two adjacent sampling moments;
when the difference value is smaller than or equal to a first preset power threshold value, taking the current actual operating frequency of the compressor as a target operating frequency;
when the difference is greater than a first preset power threshold and the difference is less than or equal to a second preset power threshold, increasing a first frequency quantity to the current actual operating frequency of the compressor, and taking the adjusted operating frequency as a target operating frequency;
when the difference value is larger than a second preset power threshold value, increasing a second frequency quantity to the current actual operating frequency of the compressor, and taking the adjusted operating frequency as a target operating frequency; wherein the second frequency amount is greater than the first frequency amount.
2. The method for controlling heat exchange efficiency of an air conditioner according to claim 1, wherein the step of acquiring a frosting area temperature, an outdoor environment temperature and an actual operation frequency of a compressor of the air conditioner in real time specifically comprises: and judging the continuous operation time of the compressor, and acquiring the frosting area temperature, the outdoor environment temperature and the actual operation frequency of the compressor in real time when the continuous operation time of the compressor reaches a first preset time threshold value.
3. The method for controlling heat exchange efficiency of an air conditioner according to claim 1, wherein the process of obtaining the operation power of the air conditioner comprises: and acquiring the current voltage value and current value of the air conditioner, and calculating the product of the voltage value and the current value to obtain the operating power of the air conditioner.
4. The method as claimed in claim 1, wherein the target operation frequency is less than or equal to a preset maximum frequency threshold.
5. The method for controlling heat exchange efficiency of an air conditioner according to claim 1, further comprising: when the air conditioner enters a heating mode, the continuous operation time of the compressor is acquired in real time, and when the continuous operation time of the compressor is determined to exceed a second preset time threshold, the air conditioner is controlled to exit the heating mode and enter a defrosting mode.
6. The heat exchange efficiency control method of an air conditioner according to any one of claims 1 to 5, wherein the frosting zone is an outdoor coil; the step of obtaining the temperature of the frosting area of the air conditioner specifically comprises the following steps: and acquiring a temperature value of an outdoor coil of the air conditioner, and taking the temperature value of the outdoor coil as a frosting area temperature value of the air conditioner.
7. An air conditioner is characterized by comprising a memory, a processor and an air conditioner control program which is stored on the memory and can run on the processor;
the air conditioner control program, when executed by the processor, implements the steps of the air conditioner heat exchange efficiency control method of any one of claims 1 to 5.
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| CN112856720B (en) * | 2021-01-29 | 2022-08-19 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner and air conditioner |
| CN114962234A (en) * | 2022-05-23 | 2022-08-30 | 合肥美的电冰箱有限公司 | Frequency control method, storage medium, computer device and refrigeration device |
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| JP6629446B2 (en) * | 2016-06-21 | 2020-01-15 | 三菱電機株式会社 | Defrost judgment device, defrost control device and air conditioner |
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| CN105650801A (en) * | 2014-12-08 | 2016-06-08 | Tcl空调器(中山)有限公司 | Method and device for controlling defrosting mode of air conditioner to start and air conditioner |
| JP2017125666A (en) * | 2016-01-15 | 2017-07-20 | ダイキン工業株式会社 | Refrigeration device and management system |
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