CN111271837B - Air conditioner internal unit control method and system, air conditioner and readable storage medium - Google Patents
Air conditioner internal unit control method and system, air conditioner and readable storage medium Download PDFInfo
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- CN111271837B CN111271837B CN201911392319.2A CN201911392319A CN111271837B CN 111271837 B CN111271837 B CN 111271837B CN 201911392319 A CN201911392319 A CN 201911392319A CN 111271837 B CN111271837 B CN 111271837B
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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
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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Abstract
The invention provides an air conditioner indoor unit control method, an air conditioner indoor unit control system, an air conditioner and a readable storage medium, wherein the air conditioner indoor unit control method comprises the following steps: after finding the flow inflection point of the electronic expansion valve of the indoor unit of the air conditioner, starting from the minimum valve step of the electronic expansion valve, gradually increasing 1 first preset valve step in each preset adjusting period, detecting the actual superheat degree, reducing the indoor unit valve step by 1 second preset valve step until the actual superheat degree is less than the target superheat degree for the first time, and quitting the control until the system capacity output changes. The invention has the advantages of adaptively correcting the superheat degree of the inner machine, optimizing the opening degree of the inner machine valve, preventing the repeated fluctuation of the inner machine valve and stably outputting the capacity of the inner machine.
Description
Technical Field
The invention relates to the technical field of air conditioner indoor units, in particular to a method and a system for controlling an air conditioner indoor unit, an air conditioner and a readable storage medium.
Background
At present, due to structural limitation, a flow curve of an internal electronic expansion valve of an air conditioner cannot be in smooth transition, if the maximum valve step is a 480-step valve, a flow inflection point (an interval with a large flow curve slope) exists between 200 steps and 300 steps, so that the internal valve is not easy to control at the inflection point (the control is unstable at the inflection point position of the internal electronic expansion valve, an adjusted balance point is not easy to find, and the adjustment is easy to pass), high pressure, internal superheat degree, valve opening degree and air outlet temperature can periodically fluctuate, and the comfort is influenced.
The prior art control techniques are as follows:
the opening of the inner machine valve in the refrigeration mode is automatically controlled according to the superheat degree. Under the normal condition of the refrigeration mode, the internal valve is controlled to change the opening degree according to the superheat degree. When the actual superheat degree of the inner machine is smaller than the target superheat degree and the refrigerant is not evaporated completely, the valve of the inner machine is turned small to reduce the evaporation capacity of the refrigerant of the evaporator; when the actual superheat degree of the inner machine is larger than the target superheat degree, the refrigerant is evaporated thoroughly, and the valve of the inner machine is enlarged to enable more refrigerant to enter the evaporator to participate in evaporation. The existing superheat degree control method comprises the following steps:
actual superheat degree delta t1 of the indoor unit is Te1-Te2(Te1 is trachea temperature sensing bulb temperature, and Te2 is liquid tube temperature sensing bulb temperature);
secondly, the target superheat degree delta t range [1, 8] is automatically corrected according to the capacity of the internal unit and the exhaust of the external unit.
The internal machine valve step change is judged according to the difference value between delta t1 and delta t.
When the actual superheat degree delta t1 is larger than the target superheat degree delta t, the internal machine valve step is increased; when the actual superheat degree delta t1 is smaller than the target superheat degree delta t, the internal valve step is reduced; when the actual superheat degree Δ t1 is equal to the target superheat degree Δ t, the internal valve step is maintained unchanged.
If the valve step is not near the inflection point, the valve step is regulated more slowly and is easy to be stable, and under the condition of unchanged capacity output, the temperature of the inner machine pipe and the temperature of the outlet air, and the high pressure and the exhaust energy of the outer machine can keep stable values.
However, in the vicinity of the inflection point section of the electronic expansion valve, as shown in fig. 2, the slope of the flow rate curve is large, and the electronic expansion valve is not easy to find the equilibrium point of adjustment, and is easy to pass over during adjustment, resulting in repeated fluctuation of the valve step with the degree of superheat. When the actual superheat degree is smaller than the target superheat degree, the inner machine valve is adjusted to be small in step, high pressure rises, and the outlet air temperature is reduced.
Chinese patent publication No. CN203869192U discloses an air conditioner outdoor unit system and an air conditioner, which ensure that when the system is in a low load state, the refrigerant flowing through a supercooling throttle valve has small flow fluctuation, so that the formed flow curve is a stable small dynamic flow curve, thereby improving the stability of the system in the low load state. But does not solve the problem of repeated fluctuations in valve step adjustment near the inflection point of the flow curve of an electronic expansion valve.
The present application is particularly proposed to solve the above problems.
Disclosure of Invention
The invention designs a control method and a control system for an air conditioner indoor unit, an air conditioner and a readable storage medium, and aims to solve the problem that the air conditioner indoor unit fluctuates repeatedly in valve step adjustment near a flow curve inflection point.
In order to solve the problems, the invention discloses a method and a system for controlling an air conditioner indoor unit, an air conditioner and a readable storage medium, wherein the method comprises the following steps:
the invention provides an air conditioner indoor unit control method in a first aspect, which comprises the following steps:
s1: detecting whether the valve steps of an expansion valve of an air conditioner internal unit fluctuate within a preset range, and if so, executing the next step;
s2: determining the minimum valve step and/or the maximum valve step of the fluctuation of the internal machine expansion valve within a preset range;
s3: the valve step of the internal machine expansion valve is operated in the minimum valve step;
s4: increasing a first preset valve step by the valve step of the internal machine expansion valve in a preset period, and detecting the actual superheat degree;
s5, judging the actual superheat degree and the target superheat degree, reducing a second preset valve step in a preset period when the actual superheat degree is smaller than the target superheat degree, operating in the adjusted valve step, and executing the step S4 if the actual superheat degree is not smaller than the target superheat degree;
s6: and the valve step is kept unchanged until the system capacity output is changed, and the control is quitted.
Further, the method comprises:
s1: detecting whether the valve steps of an expansion valve of an air conditioner internal unit fluctuate within a preset range, and if so, executing the next step;
s2: determining the minimum valve step and/or the maximum valve step of the fluctuation of the internal machine expansion valve within a preset range;
s3: the valve step of the internal machine expansion valve is operated in the maximum valve step;
s4: reducing the first preset valve step by the valve step of the internal machine expansion valve in a preset period, and detecting the actual superheat degree;
s5, judging the actual superheat degree and the target superheat degree, increasing a second preset valve step in a preset period when the actual superheat degree is larger than the target superheat degree, operating in the adjusted valve step, and executing S4 if the actual superheat degree is not larger than the target superheat degree;
s6: and the valve step is kept unchanged until the system capacity output is changed, and the control is quitted.
Further, the first preset valve step calculation method is to equally divide the difference between the maximum valve step and the minimum valve step.
Further, when the actual superheat degree is smaller than the target superheat degree in the step S5, the actual superheat degree is first smaller than the target superheat degree, and when the actual superheat degree is larger than the target superheat degree in the step S5, the actual superheat degree is first larger than the target superheat degree.
Furthermore, the second preset valve step in the step S5 is less than or equal to the first preset valve step, the degree of superheat of the internal machine is corrected to optimize the degree of opening of the internal machine valve, repeated fluctuation of the internal machine valve is prevented, the capacity of the internal machine is stably output, and the comfort is improved.
Further, the maximum valve step in the step S2 is the maximum valve step in a preset number of continuous fluctuation cycles or the average value of the maximum valve steps in the preset number of continuous fluctuation cycles, and the minimum valve step in the step S2 is the minimum valve step in the preset number of continuous fluctuation cycles or the average value of the minimum valve step in the preset number of continuous fluctuation cycles.
Further, the calculation of the actual superheat degree is the difference between the tracheal thermometer bulb temperature and the liquid tube thermometer bulb temperature.
A second aspect of the present invention provides a control system comprising:
the flow inflection point judging module is used for detecting whether the valve steps of an expansion valve of an air conditioner indoor unit fluctuate within a preset range or not, and if so, executing the next step;
the valve step adjusting module is used for determining the minimum valve step and/or the maximum valve step of fluctuation of the internal machine expansion valve within a preset range; the valve step of the internal machine expansion valve is operated in the minimum valve step; increasing a first preset valve step by the valve step of the internal machine expansion valve in a preset period, and detecting the actual superheat degree; judging the actual superheat degree and the target superheat degree, reducing a second preset valve step in a preset period when the actual superheat degree is smaller than the target superheat degree, operating in the adjusted valve step, and executing the previous step if the actual superheat degree is not smaller than the target superheat degree; and the valve step is kept unchanged until the system capacity output is changed, and the control is quitted.
A third aspect of the present invention provides an air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the above method.
A fourth aspect of the invention provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the method described above.
Compared with the prior art, the invention has the advantages that after the flow inflection point position of the electronic expansion valve detects that parameters such as valve step, superheat degree and the like periodically fluctuate for a plurality of cycles, the superheat degree is adjusted in a self-adaptive manner, and finally, a proper valve step position is found and fixed, so that the influence on comfort caused by repeated fluctuation of the valve is avoided.
Drawings
Fig. 1 is a schematic diagram illustrating positions of temperature sensing bulbs of an indoor unit of a multi-split air conditioner according to an embodiment of the invention;
FIG. 2 shows the inflection point position of the flow curve of the electronic expansion valve;
fig. 3 is a flowchart of a method for controlling an air conditioner internal unit according to embodiment 1 of the present invention;
fig. 4 is a flowchart of a method for controlling an air conditioner internal unit according to embodiment 2 of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Example 1
The embodiment provides a control method of an air conditioner internal unit, which uses an air conditioner internal unit, as shown in fig. 1, including an electronic expansion valve, an evaporator, a compressor and a controller (not shown), where the evaporator is provided with a liquid pipe temperature sensing bulb and a gas pipe temperature sensing bulb, and is used for sensing the temperature at the outlet of the evaporator, converting the temperature information into pressure information, and transmitting the pressure information to a valve body, so as to adjust the flow rate. The electronic expansion valve collects a superheat degree signal through the temperature sensing bulb, the opening degree of the expansion valve is controlled by adopting feedback adjustment, the adjustment quality of the system is improved, and the superheat degree is controlled within a target range in a wide evaporation temperature area. The actual superheat degree is calculated as the difference between the temperature of the tracheal thermometer bulb and the temperature of the liquid-tube thermometer bulb.
As shown in fig. 3, the control method of the air conditioner internal unit provided in this embodiment is as follows:
and S1, detecting whether the valve step of the expansion valve of the air conditioner indoor unit fluctuates in a preset range, judging the flow inflection point of the electronic expansion valve, if so, taking the flow inflection point as the flow inflection point, and carrying out the next step, otherwise, repeating the step S1.
If the preset number (N) of cycles of continuous fluctuation of the internal machine valve steps is detected within the preset monitoring time, the flow inflection point of the electronic expansion valve exists. N is more than or equal to 5, preferably, the preset number N is set to 10 in the embodiment to filter the mutation value and ensure the judgment accuracy of the flow inflection point. The monitoring time is preset to an empirical value. And if the minimum valve step and the maximum valve step in one period are within the preset threshold range, the minimum valve step and the maximum valve step are considered as a fluctuation period, so that the flow inflection point is prevented from being judged by mistake. The preset threshold range value is an empirical value.
S2: and determining the minimum valve step and/or the maximum valve step of the fluctuation of the internal machine expansion valve within a preset range.
In a preset number of fluctuation cycles, recording the minimum valve step as a and the maximum valve step as B (a < B) in the phase, and equally dividing the maximum valve step difference value C (C ═ B-a) to set a first preset valve step, preferably, the embodiment equally divides the maximum valve step difference value into 10 parts, that is, the first preset valve step D ═ B-a)/10, and then the process proceeds to S3.
S3: the valve step of the internal machine expansion valve is operated in the minimum valve step;
s4: in a preset period, the valve step of the internal machine expansion valve is increased by a first preset valve step, and the actual superheat degree is detected.
And D, adding 1 first preset valve step for the minimum valve step of the expansion valve of the indoor unit, wherein the actual superheat degree delta t1 is larger than the target superheat degree delta t, and detecting the actual superheat degree of the indoor unit of the air conditioner after waiting for a preset period. The preset waiting time is an empirical value, and preferably, the preset waiting time is set to 40 seconds in the embodiment.
S5: and judging the actual superheat degree and the target superheat degree, reducing a second preset valve step in a preset period when the actual superheat degree is smaller than the target superheat degree, operating in the adjusted valve step, and executing the step S4 if the actual superheat degree is not smaller than the target superheat degree.
And D, gradually increasing a first preset valve step by the internal valve step, detecting and comparing the actual superheat degree delta t1 with the target superheat degree delta t after waiting for a preset period, and repeating S4 if the actual superheat degree is more than or equal to the target superheat degree (delta t1 is more than or equal to delta t).
Assuming that the first preset valve step D is increased for the mth time (m is more than or equal to 1 and less than or equal to 10), the internal valve step is started to AmIncreasing a first preset valve step D again when the step A + mD is still equal to the step delta t1 and the step A is started after waiting for a preset periodm+1Step Am+1A + (m +1) D. At the moment, the actual superheat degree delta t1 is detected to be smaller than the target superheat degree delta t for the first time, the internal valve step reaches an internal valve step critical value, the valve step is adjusted excessively, and after the preset period is waited, the internal valve step is reduced by 1 second preset valve step. The second preset valve step is less than or equal to the first preset valve step, if the second preset valve step is equal to the first preset valve step, the valve step of the air conditioner internal machine is Am. The proportional relationship between the second preset valve step and the first preset valve step is not limited in the invention. In some embodiments, the second preset valve step may be 1/2 or 1/3 first preset valves D, where the valve step of the air conditioner indoor unit is a + (m +1/2) D or a + (m +2/3) D.
S6: the valve step is kept unchanged until the system capacity output is changed, and the control is quitted, namely the valve step is kept unchanged until the frequency of an internal machine is turned off or turned on or a compressor is changed (the system capacity output is changed), and the internal machine valve step is quitted from the self-adaptive regulation automatic control.
The invention aims to solve the technical problem that the cycle fluctuation problem of the valve steps of the inner machine during refrigeration (the valve steps of the inner machine are in the maximum opening degree and have no fluctuation problem during heating) is solved by adaptively adjusting the superheat degree of the inner machine. Compared with the prior art, the method has the advantages that after the flow inflection point position of the valve detects that parameters such as valve steps, superheat degree and the like periodically fluctuate for a preset number of periods, the superheat degree is adjusted in a self-adaptive mode, and finally a proper valve step position is found and fixed, so that the phenomenon that the comfort is influenced due to repeated fluctuation of the valve is avoided.
After the method is adopted, the invention has the following advantages: after the electronic expansion valve is detected to periodically fluctuate, self-adaptive micro-adjustment is carried out, so that frequent fluctuation of high pressure, exhaust, air outlet temperature and the like is avoided; the degree of superheat of the inner machine is corrected to optimize the degree of opening of the inner machine valve, the repeated fluctuation of the inner machine valve is prevented, the capacity of the inner machine is stably output, and the comfort is improved.
Example 2
As shown in fig. 4, the control method of the air conditioner internal unit provided in this embodiment is as follows:
s1: and detecting whether the valve steps of the expansion valve of the indoor unit of the air conditioner fluctuate within a preset range, and if so, executing the next step.
This procedure is the same as in example 1.
S2: and determining the minimum valve step and/or the maximum valve step of the fluctuation of the internal machine expansion valve within a preset range.
This procedure is the same as in example 1.
S3: the valve step of the internal machine expansion valve is operated in the maximum valve step;
s4: in a preset period, the valve step of the internal machine expansion valve is reduced by a first preset valve step, and the actual superheat degree is detected.
And D, subtracting 1 first preset valve step from the maximum valve step by the valve step of the expansion valve of the indoor unit, detecting the actual superheat degree of the indoor unit of the air conditioner after waiting for a preset period, wherein the actual superheat degree delta t1 is less than the target superheat degree delta t. The preset waiting time is an empirical value, and preferably, the preset waiting time is set to 40 seconds in the embodiment.
S5: and judging the actual superheat degree and the target superheat degree, adding a second preset valve step in a preset period when the actual superheat degree is larger than the target superheat degree, operating in the adjusted valve step, and executing the step S4 if the actual superheat degree is not larger than the target superheat degree.
And D, reducing the valve step of the internal machine by a first preset valve step, after waiting for a preset period, detecting and comparing the actual superheat degree delta t1 with the target superheat degree delta t, and repeating S4 if the actual superheat degree is less than or equal to the target superheat degree (delta t1 is less than or equal to delta t).
Assuming that the m (1 is more than or equal to m and less than or equal to 10) is reduced by the first preset valve step D, the internal valve step is started to AmStep D, reducing a first preset valve step again and waiting for a preset period when step A-mD is still less than or equal to step delta t of step delta t1After that, the valve is stepped to Am+1Step Am+1A- (m +1) D. At the moment, the actual superheat degree Deltat 1 is detected for the first time>And (3) the target superheat degree delta t, the valve step of the internal machine reaches the critical value of the valve step of the internal machine, the valve step is adjusted too much, and after waiting for a preset period, the valve step of the internal machine is increased by 1 second preset valve step. The second preset valve step is less than or equal to the first preset valve step, and if the second preset valve step is equal to the first preset valve step, the valve step of the air conditioner internal unit at the moment is Am. The proportional relationship between the second preset valve step and the first preset valve step is not limited in the invention. In some embodiments, the second predetermined valve step may be 1/2 or 1/3 first predetermined valve steps D, where the valve step of the air conditioner indoor unit is a- (m +1/2) D or a- (m +2/3) D.
S6: the valve step is kept unchanged until the system capacity output is changed, and the control is quitted, namely the valve step is kept unchanged until the frequency of an internal machine is turned off or turned on or a compressor is changed (the system capacity output is changed), and the internal machine valve step is quitted from the self-adaptive regulation automatic control.
Example 3
When the air conditioner internal unit completes self-adaptive adjustment according to the control method of the embodiment 1 or 2, and the output capacity of the system is stable, if one internal unit is manually turned off or turned on, the valve steps are fluctuated again, and the control method of the air conditioner internal unit of the embodiment 1 or 2 is carried out again until the output capacity of the air conditioner system is stable again.
Example 4
This embodiment provides a control system of air conditioner internal unit, control system is used for the air conditioner, control system includes:
the valve step detection module is used for detecting whether the valve step of an expansion valve of an air conditioner internal unit fluctuates within a preset range or not;
the valve step adjusting module is used for determining the minimum valve step and/or the maximum valve step of the fluctuation of the internal machine expansion valve within a preset range and operating according to the minimum valve step and/or the maximum valve step;
the temperature detection and judgment module is used for detecting and judging the actual superheat degree and the target superheat degree;
and the control module is used for adjusting the increase or decrease of the valve steps.
Example 5
The embodiment discloses an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the control method of the air conditioner internal unit.
Example 6
The embodiment discloses a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the computer program realizes the control method of the air conditioner internal unit.
Although the present invention is disclosed above, the present invention is not limited thereto. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A control method for an air conditioner indoor unit is characterized by comprising the following steps:
s1: detecting whether the valve steps of an expansion valve of an air conditioner internal unit fluctuate within a preset range, and if so, executing the next step;
s2: determining the minimum valve step of fluctuation of the internal machine expansion valve within a preset range;
s3: the valve step of the internal machine expansion valve is operated in the minimum valve step;
s4: increasing a first preset valve step by the valve step of the internal machine expansion valve in a preset period, and detecting the actual superheat degree;
s5, judging the actual superheat degree and the target superheat degree, reducing a second preset valve step in a preset period when the actual superheat degree is smaller than the target superheat degree, operating in the adjusted valve step, and executing the step S4 if the actual superheat degree is not smaller than the target superheat degree;
s6: the valve step is kept unchanged until the system capacity output is changed, and the control is quitted;
wherein the second predetermined valve step in step S5 is less than or equal to the first predetermined valve step.
2. The control method for the indoor unit of an air conditioner according to claim 1, wherein the first preset valve step is calculated by averaging the difference between the maximum valve step and the minimum valve step.
3. The control method for the indoor unit of an air conditioner according to claim 1, wherein the time when the actual degree of superheat is less than the target degree of superheat in step S5 is the time when the actual degree of superheat is first less than the target degree of superheat.
4. The control method for the indoor unit of an air conditioner according to claim 1, wherein the minimum valve step in the step S2 is the minimum valve step in a preset number of consecutive fluctuation periods or an average value of the minimum valve steps in the preset number of consecutive fluctuation periods.
5. The control method for the indoor unit of an air conditioner according to claim 1, wherein the actual superheat degree is calculated as a difference between a temperature of the air pipe bulb and a temperature of the liquid pipe bulb.
6. A control system characterized by employing the control method of any one of claims 1 to 5, comprising:
the valve step detection module is used for detecting whether the valve step of an expansion valve of an air conditioner internal unit fluctuates within a preset range or not;
the valve step adjusting module is used for determining the minimum valve step of fluctuation of the internal machine expansion valve within a preset range and operating in the minimum valve step;
the temperature detection and judgment module is used for detecting and judging the actual superheat degree and the target superheat degree;
and the control module is used for adjusting the increase or decrease of the valve steps.
7. A control method for an air conditioner indoor unit is characterized by comprising the following steps:
s1: detecting whether the valve steps of an expansion valve of an air conditioner internal unit fluctuate within a preset range, and if so, executing the next step;
s2: determining the maximum valve step of fluctuation of the internal machine expansion valve within a preset range;
s3: the valve step of the internal machine expansion valve is operated in the maximum valve step;
s4: reducing the first preset valve step by the valve step of the internal machine expansion valve in a preset period, and detecting the actual superheat degree;
s5, judging the actual superheat degree and the target superheat degree, increasing a second preset valve step in a preset period when the actual superheat degree is larger than the target superheat degree, operating in the adjusted valve step, and executing S4 if the actual superheat degree is not larger than the target superheat degree;
s6: the valve step is kept unchanged until the system capacity output is changed, and the control is quitted;
wherein the second predetermined valve step in step S5 is less than or equal to the first predetermined valve step.
8. The control method for the indoor unit of an air conditioner according to claim 7, wherein the first preset valve step is calculated by averaging the difference between the maximum valve step and the minimum valve step.
9. The control method for the indoor unit of an air conditioner according to claim 7, wherein the time when the actual superheat degree is greater than the target superheat degree in the step S5 is the time when the actual superheat degree is first greater than the target superheat degree.
10. The control method for the indoor unit of an air conditioner according to claim 7, wherein the maximum valve step in the step S2 is the maximum valve step in a preset number of continuous fluctuation cycles or an average value of the maximum valve steps in the preset number of continuous fluctuation cycles.
11. The control method for the indoor unit of an air conditioner according to claim 7, wherein the actual superheat degree is calculated as a difference between a temperature of the air pipe bulb and a temperature of the liquid pipe bulb.
12. A control system characterized by employing the control method according to any one of claims 7 to 11, comprising:
the valve step detection module is used for detecting whether the valve step of an expansion valve of an air conditioner internal unit fluctuates within a preset range or not;
the valve step adjusting module is used for determining the maximum valve step of fluctuation of the internal machine expansion valve within a preset range and operating in the maximum valve step;
the temperature detection and judgment module is used for detecting and judging the actual superheat degree and the target superheat degree;
and the control module is used for adjusting the increase or decrease of the valve steps.
13. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method of any one of claims 1 to 5 and/or the method of any one of claims 7 to 11.
14. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method of any of claims 1-5 and/or the method of any of claims 7-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911392319.2A CN111271837B (en) | 2019-12-30 | 2019-12-30 | Air conditioner internal unit control method and system, air conditioner and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911392319.2A CN111271837B (en) | 2019-12-30 | 2019-12-30 | Air conditioner internal unit control method and system, air conditioner and readable storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111271837A CN111271837A (en) | 2020-06-12 |
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| CN113819569B (en) * | 2021-10-19 | 2022-10-25 | 宁波奥克斯电气股份有限公司 | Heating process APF automatic debugging control method and device, computer equipment and computer readable storage medium |
| CN114135929B (en) * | 2021-11-22 | 2023-06-20 | 宁波奥克斯电气股份有限公司 | Control method and control device for multi-connected internal unit and air conditioning unit |
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