CN110966712B - Method and device for determining target exhaust temperature of electronic expansion valve of air conditioner - Google Patents
Method and device for determining target exhaust temperature of electronic expansion valve of air conditioner Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000005057 refrigeration Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 abstract description 11
- 238000010998 test method Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 4
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- 238000004378 air conditioning Methods 0.000 description 1
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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
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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
- F24F11/83—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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- 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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Abstract
The invention discloses a method and a device for determining target exhaust temperature of an electronic expansion valve of an air conditioner, wherein the method comprises the following steps: acquiring the current rated frequency and the current rated capacity parameter of the current air conditioner; searching a reference rated capacity parameter consistent with the current rated capacity parameter, and acquiring a reference data record number containing the reference rated capacity parameter; calculating the ratio of the current rated frequency to the reference rated frequency; adjusting the reference target exhaust temperature parameter according to the ratio to obtain a current target exhaust temperature parameter; and determining the target exhaust temperature of the electronic expansion valve of the current air conditioner according to the current target exhaust temperature parameter. By applying the method and the device, the problems that in the prior art, the target exhaust temperature of the electronic expansion valve is determined, the process is complex and difficult to realize due to unreasonable selection by experience or all air conditioners are determined by a test method can be solved.
Description
Technical Field
The invention belongs to the technical field of air conditioning, particularly relates to control of an air conditioner, and more particularly relates to a method and a device for determining target exhaust temperature of an electronic expansion valve in the air conditioner.
Background
The electronic expansion valve is applied to a refrigerant circulating system of an air conditioner, and the refrigerant circulating quantity in the system is adjusted by adjusting the opening of the electronic expansion valve, so that the running performance requirement of the air conditioner is met. In the prior art, when an air conditioner is operated, the opening degree of an electronic expansion valve is usually adjusted based on the difference between the real-time exhaust temperature of a compressor and a target exhaust temperature.
In the control method of the electronic expansion valve, the selection of the target exhaust temperature is very important, and if the target exhaust temperature is not properly selected, the speed and the accuracy of the opening adjustment of the electronic expansion valve are affected, and a better energy efficiency ratio is difficult to obtain. In the existing method, the target exhaust temperature can be determined according to the target exhaust temperature parameter and the real-time operation frequency of the compressor. For the selection of the target exhaust temperature parameter applied for determining the target exhaust temperature, no theoretical guidance is provided, and a fixed value is selected only by experience, or a fixed value is determined through a large number of experimental tests. The selection is carried out by experience, and for air conditioners of different types, the selection is often not proper due to the large difference of performance parameters; if the air conditioner is determined by a test method, the test process is complex due to multiple air conditioner models, and the air conditioner is difficult to realize in the actual process. Accordingly, there is a need for improvement in the art of determining a target exhaust temperature.
Disclosure of Invention
The invention aims to provide a method and a device for determining a target exhaust temperature of an electronic expansion valve of an air conditioner, which solve the problems that the process is complicated and difficult to realize and the like caused by unreasonable selection by experience or all air conditioners determined by a test method in the prior art for determining the target exhaust temperature of the electronic expansion valve.
In order to achieve the purpose of the invention, the method provided by the invention is realized by adopting the following technical scheme:
a method of determining a target discharge temperature for an electronic expansion valve of an air conditioner, the method comprising:
acquiring the current rated frequency of the current air conditioner and the current rated capacity parameter representing the operation capacity of the air conditioner;
searching a reference rated capacity parameter consistent with the current rated capacity parameter from a known reference database, and acquiring a reference data record containing the reference rated capacity parameter, wherein the reference data record at least comprises a reference rated frequency and a reference target exhaust temperature parameter;
calculating a ratio r1 of the current rated frequency to the reference rated frequency, r1= current rated frequency/reference rated frequency; when r1 is less than or equal to 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter/r 1, and the current target exhaust temperature parameter is obtained; at r1 > 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter 2/(1 + r 1), and obtaining a current target exhaust temperature parameter; a is an adjustment factor;
determining the target exhaust temperature of the electronic expansion valve of the current air conditioner according to the current target exhaust temperature parameter and the corresponding relation between the known target exhaust temperature parameter and the target exhaust temperature; the corresponding relation between the target exhaust temperature parameter and the target exhaust temperature is a positive correlation.
As described above, the method for determining the target exhaust temperature of the electronic expansion valve of the air conditioner according to the current target exhaust temperature parameter and the known corresponding relationship between the target exhaust temperature parameter and the target exhaust temperature includes:
acquiring the real-time running frequency f of a compressor of the current air conditioner;
if the current operation mode of the air conditioner is a refrigeration mode, determining the target exhaust temperature of the electronic expansion valve in the refrigeration mode according to a formula Tc = a f + b; tc is the target exhaust temperature of the electronic expansion valve in the refrigeration mode;
if the current operation mode of the air conditioner is a heating mode, determining the target exhaust temperature of the electronic expansion valve in the heating mode according to a formula Th = c × f + d, wherein Th is the target exhaust temperature of the electronic expansion valve in the heating mode.
Preferably, the adjustment factor a is constant.
More preferably, the adjustment factor is determined according to the environmental parameter of the current air conditioner.
Further, the reference data record further includes a reference indoor environment temperature and a reference outdoor environment temperature, and the determining the adjustment factor according to the current environment parameter of the air conditioner specifically includes:
the method comprises the steps of obtaining real-time indoor environment temperature and real-time outdoor environment temperature of the environment where the current air conditioner is located, calculating the real-time indoor environment temperature, first temperature difference between reference indoor environment temperatures and second temperature difference between the real-time outdoor environment temperatures and reference outdoor environment temperatures, determining an adjusting factor corresponding to the first temperature difference and the second temperature difference according to the corresponding relation of known temperature difference and the adjusting factor, and taking the adjusting factor as the adjusting factor corresponding to the current air conditioner.
In order to achieve the purpose, the device provided by the invention adopts the following scheme:
an apparatus for determining a target discharge temperature for an electronic expansion valve of an air conditioner, the apparatus comprising:
the first obtaining unit is used for obtaining the current rated frequency of the current air conditioner and the current rated capacity parameter representing the operation capacity of the air conditioner;
a reference data record obtaining unit, configured to search a known reference database for a reference rated capacity parameter consistent with the current rated capacity parameter, and obtain a reference data record including the reference rated capacity parameter, where the reference data record further includes at least a reference rated frequency and a reference target exhaust temperature parameter;
a current target exhaust temperature parameter obtaining unit, configured to calculate a ratio r1 of the current rated frequency to the reference rated frequency, where r1= current rated frequency/reference rated frequency; when r1 is less than or equal to 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter/r 1, and the current target exhaust temperature parameter is obtained; at r1 > 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter 2/(1 + r 1), and obtaining a current target exhaust temperature parameter; a is an adjustment factor;
the target exhaust temperature determining unit is used for determining the target exhaust temperature of the electronic expansion valve of the current air conditioner according to the current target exhaust temperature parameter and the corresponding relation between the known target exhaust temperature parameter and the target exhaust temperature; the corresponding relation between the target exhaust temperature parameter and the target exhaust temperature is a positive correlation.
The apparatus as described above, where the current target exhaust temperature parameter includes a first parameter a and a second parameter b corresponding to a cooling mode, and a third parameter c and a fourth parameter d corresponding to a heating mode, and the target exhaust temperature determining unit determines the target exhaust temperature of the electronic expansion valve of the air conditioner according to the current target exhaust temperature parameter and a corresponding relationship between a known target exhaust temperature parameter and a target exhaust temperature, specifically includes:
acquiring the real-time running frequency f of a compressor of the current air conditioner;
if the current operation mode of the air conditioner is a refrigeration mode, determining the target exhaust temperature of the electronic expansion valve in the refrigeration mode according to a formula Tc = a f + b; tc is the target exhaust temperature of the electronic expansion valve in the refrigeration mode;
if the current operation mode of the air conditioner is a heating mode, determining the target exhaust temperature of the electronic expansion valve in the heating mode according to a formula Th = c × f + d, wherein Th is the target exhaust temperature of the electronic expansion valve in the heating mode.
Preferably, the adjustment factor a is constant.
More preferably, the apparatus further comprises:
and the adjusting factor determining unit is used for determining the adjusting factor according to the environmental parameters of the current air conditioner.
Further, the reference data record further includes a reference indoor environment temperature and a reference outdoor environment temperature, and the adjustment factor determining unit determines the adjustment factor according to the environment parameter where the current air conditioner is located, specifically including:
the method comprises the steps of obtaining real-time indoor environment temperature and real-time outdoor environment temperature of the environment where the current air conditioner is located, calculating the real-time indoor environment temperature, first temperature difference between reference indoor environment temperatures and second temperature difference between the real-time outdoor environment temperatures and reference outdoor environment temperatures, determining an adjusting factor corresponding to the first temperature difference and the second temperature difference according to the corresponding relation of known temperature difference and the adjusting factor, and taking the adjusting factor as the adjusting factor corresponding to the current air conditioner.
Compared with the prior art, the invention has the advantages and positive effects that: according to the method and the device for determining the target exhaust temperature of the electronic expansion valve, the reference database is preset, the reference data record is prestored in the reference database, the target exhaust temperature parameter matched with the current air conditioner is determined according to the reference data record and the current rated frequency and the current rated capacity parameter of the current air conditioner, the target exhaust temperature parameters of all the air conditioners do not need to be tested in advance, the self-adaptive adjustment of the target exhaust temperature parameters of all the air conditioners can be realized, and the self-adaptive adjustment of the target exhaust temperature is further realized by utilizing the target exhaust temperature parameters which are self-adaptively adjusted; the process only needs to test one of the air conditioners with the same rated capacity parameter, so that the problems of complex test process and difficult realization caused by the fact that each air conditioner is tested are effectively avoided; moreover, the target exhaust temperature parameter can be adjusted in a self-adaptive manner instead of being determined only by experience, so that the problem that the target exhaust temperature is unreasonable due to the fact that the target exhaust temperature parameter is selected only by experience in the prior art is effectively solved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a flow chart of one embodiment of a method for determining a target discharge temperature for an electronic expansion valve of an air conditioner in accordance with the present invention;
fig. 2 is a block diagram illustrating an embodiment of an apparatus for determining a target discharge air temperature of an electronic expansion valve of an air conditioner according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a flowchart of an embodiment of a method for determining a target discharge air temperature of an electronic expansion valve of an air conditioner according to the present invention is shown.
As shown in fig. 1, this embodiment determines the target discharge temperature of the electronic expansion valve of the air conditioner using the following procedure:
step 11: and acquiring the current rated frequency and the current rated capacity parameter of the current air conditioner.
The current air conditioner is an air conditioner which is operated and needs to determine the target exhaust temperature of the electronic expansion valve. The current rated frequency and the current rated capacity parameter both refer to the performance parameter of the current air conditioner. The rated capacity parameter is a parameter representing the operation capacity of the air conditioner, and includes, but is not limited to, a rated cooling capacity or a rated heating capacity. Any air conditioner has fixed rated frequency and rated capacity parameters, and the parameters are stored on a computer board of the air conditioner and can be conveniently read by a controller of the air conditioner.
Step 12: and searching a reference rated capacity parameter consistent with the current rated capacity parameter from a reference database, and acquiring a reference data record containing the reference rated capacity parameter.
In the embodiment, a reference database is preset on the computer board of the air conditioner, a plurality of reference data records are stored in the reference database, and each reference data record at least comprises a reference rated capacity parameter, a reference rated frequency and a reference target exhaust temperature parameter. Moreover, all data in each reference data record corresponds to the same reference air conditioner. The reference rated capacity parameter is a parameter for representing the operation capacity of the reference air conditioner, and comprises but is not limited to rated refrigerating capacity or rated heating capacity, and the reference rated capacity parameter and the reference rated frequency are known and fixed; the reference target discharge temperature parameter is a parameter for determining a target discharge temperature of an electronic expansion valve of the reference air conditioner, and is preferably a more reasonable parameter obtained through a large number of theoretical analyses and experimental tests in a laboratory.
In a preferred embodiment, the reference database stores reference data records with nominal capacity parameters as a reference for storage, each nominal capacity parameter having only one reference data record, and the reference database stores reference data records of all, at least almost all, different nominal capacity parameters. The reference database formed by the method comprises reference data records with different rated capacity parameters as much as possible, so that the target exhaust temperature parameters of other air conditioners can be determined accurately and comprehensively based on the reference data records, and the complicated process of determining reasonable parameters in a laboratory by adopting a complicated means can be reduced as much as possible.
After the current rated capacity parameter of the current air conditioner is acquired in step 11, a reference rated capacity parameter consistent with the current rated capacity parameter is searched from a preset reference database, and then a reference data record containing the reference rated capacity parameter is acquired. The reference rated capacity parameter consistent with the current rated capacity parameter refers to the reference rated capacity parameter identical with the current rated capacity parameter. For example, the current rated capacity parameter is 2600W of cooling capacity, and the reference rated capacity parameter consistent therewith is 2600W of cooling capacity.
Step 13: and calculating a ratio r1 of the current rated frequency and the reference rated frequency, and adjusting the reference target exhaust temperature parameter according to the ratio r1 to obtain the current target exhaust temperature parameter.
Step 14: and determining the target exhaust temperature of the electronic expansion valve of the current air conditioner according to the current target exhaust temperature parameter and the corresponding relation between the known target exhaust temperature parameter and the target exhaust temperature.
The corresponding relation between the target exhaust temperature parameter and the target exhaust temperature is pre-stored on the computer board of the air conditioner, and the corresponding relation between the target exhaust temperature parameter and the target exhaust temperature is a positive correlation. The positive correlation correspondence between the target exhaust temperature parameter and the target exhaust temperature may be all possible correspondences existing in the prior art, and the embodiment is not limited thereto. By adopting the corresponding relation, the corresponding target exhaust temperature can be determined according to the target exhaust temperature parameter, so that the target exhaust temperature of the electronic expansion valve of the air conditioner at present can be determined.
The method of the embodiment is adopted to determine the current target exhaust temperature of the current air conditioner, and since the ratio r1= the current rated frequency/the reference rated frequency, when r1 is less than or equal to 1, the calculation formula of the current target exhaust temperature parameter is as follows: current target exhaust temperature parameter = a × reference target exhaust temperature parameter/r 1. Then, after the adjustment factor a is determined, the current target exhaust temperature parameter exhibits a negative correlation with the current nominal frequency. For example, setting A =1, r1 ≦ 1, and 1/r1 ≧ 1, then the current target exhaust temperature parameter is greater than the reference target exhaust temperature parameter. And the smaller the current rated frequency is, the smaller r1 is, and the larger the current target exhaust temperature parameter is obtained through calculation. This is consistent with the operation performance of the air conditioner. Specifically, if the current rated frequency is less than the reference rated frequency, indicating that the current air conditioner needs to operate at a frequency less than the reference rated frequency if the same operation capacity, such as the same cooling capacity or heating capacity, is to be achieved, then the current air conditioner has a large compressor and a large heat exchanger compared to the reference air conditioner having the reference rated frequency; at this time, the current target exhaust temperature parameter is greater than the reference target exhaust temperature parameter, then, the current target exhaust temperature of the electronic expansion valve determined according to the current target exhaust temperature parameter and the positive correlation is also greater than the target exhaust temperature of the electronic expansion valve of the reference air conditioner, the greater target exhaust temperature can ensure the stability of a refrigerant circulation system formed by the large compressor and the large heat exchanger and the rapidity and accuracy of subsequent opening adjustment of the electronic expansion valve, and the air conditioner has a better energy efficiency ratio.
And if r1 > 1, the calculation formula of the current target exhaust temperature parameter is: current target exhaust temperature parameter = a × reference target exhaust temperature parameter 2/(1 + r 1). Then, after the adjustment factor a is determined, the current target exhaust temperature parameter also exhibits a negative correlation with the current nominal frequency. For example, setting a =1, r1 > 1, 2/(1 + r 1) is less than 1, then the current target exhaust temperature parameter is less than the reference target exhaust temperature parameter. And the larger the current rated frequency is, the larger r1 is, and the smaller the current target exhaust temperature parameter obtained by calculation is. This is consistent with the operation performance of the air conditioner. Specifically, if the current rated frequency is greater than the reference rated frequency, indicating that the current air conditioner needs to operate at a frequency greater than the reference rated frequency if the same operation capacity, such as the same cooling capacity or heating capacity, is to be achieved, then the current air conditioner has a small compressor and a small heat exchanger compared to the reference air conditioner having the reference rated frequency; at this time, the current target exhaust temperature parameter is smaller than the reference target exhaust temperature parameter, then, the current target exhaust temperature of the electronic expansion valve determined according to the current target exhaust temperature parameter and the positive correlation is also smaller than the target exhaust temperature of the electronic expansion valve of the reference air conditioner, the smaller target exhaust temperature can ensure the stability of a refrigerant circulation system formed by the small compressor and the small heat exchanger and the rapidity and accuracy of the subsequent opening adjustment of the electronic expansion valve, and the air conditioner has a better energy efficiency ratio. And, if r1 > 1, 2/(1 + r 1) > 1/r1, the current target exhaust gas temperature parameter determined using 2/(1 + r 1) as the adjustment parameter will be greater than the current target exhaust gas temperature parameter determined using 1/r1 as the adjustment parameter. Then, the current target exhaust temperature finally obtained by adopting 2/(1 + r 1) as the adjusting parameter is less than the target exhaust temperature of the electronic expansion valve of the reference air conditioner, but not too low, so that the adverse effect caused by the excessively high exhaust temperature easily caused by the excessively low target exhaust temperature of the electronic expansion valve is avoided.
And the method of the embodiment is adopted to determine the current target exhaust temperature of the current air conditioner, reference data records are prestored in the reference database through the preset reference database, the target exhaust temperature parameter matched with the current air conditioner is determined according to the reference data records and the current rated frequency and the current rated capacity parameter of the current air conditioner, the self-adaptive adjustment of the target exhaust temperature parameters of all the air conditioners can be realized without pre-testing the target exhaust temperature parameters of all the air conditioners, and the self-adaptive adjustment of the target exhaust temperature is further realized by utilizing the self-adaptively adjusted target exhaust temperature parameters. The process only needs to test one of the air conditioners with the same rated capacity parameter, and the problems that the test process is complex and difficult to realize due to the fact that each air conditioner is tested are effectively avoided. In addition, the target exhaust temperature parameter can be adjusted in a self-adaptive mode instead of being determined only by experience, and therefore the problem that in the prior art, the target exhaust temperature parameter is unreasonable due to the fact that the target exhaust temperature parameter is selected only by experience, and accordingly the target exhaust temperature is unreasonable is effectively solved.
In some other preferred embodiments, the determining the target exhaust temperature of the electronic expansion valve of the air conditioner according to the current target exhaust temperature parameter and the known corresponding relationship between the target exhaust temperature parameter and the target exhaust temperature includes:
acquiring the real-time running frequency f of a compressor of the current air conditioner;
if the current operation mode of the air conditioner is a refrigeration mode, determining the target exhaust temperature of the electronic expansion valve in the refrigeration mode according to a formula Tc = a f + b; tc is the target exhaust temperature of the electronic expansion valve in the refrigeration mode;
if the current operation mode of the air conditioner is a heating mode, determining the target exhaust temperature of the electronic expansion valve in the heating mode according to a formula Th = c × f + d, wherein Th is the target exhaust temperature of the electronic expansion valve in the heating mode.
If the current target exhaust temperature parameter includes the above four parameters a, b, c, and d, and correspondingly, the reference target exhaust temperature parameter also includes similar four parameters, which are respectively marked as a0, b0, c0, and d0, according to the method of the embodiment in fig. 1, when r1 is less than or equal to 1, the four current target exhaust temperature parameters are respectively calculated, specifically: a = a0/r1, b = a b0/r1, c = a c0/r1, d = a d0/r 1; when r1 is greater than 1, four current target exhaust temperature parameters are respectively calculated, specifically: a = a × a0 × 2/(1 + r 1), b = a × b0 × 2/(1 + r 1), c = a × c0 × 2/(1 + r 1), and d = a × d0 × 2/(1 + r 1).
In some other preferred embodiments, the adjustment factor a in the formula for calculating the current target exhaust temperature parameter is preferably a variable value dynamically determined according to the environmental parameter of the current air conditioner, so as to improve the accuracy of the target exhaust temperature determined based on the adjustment factor. Specifically, in the reference database, the reference data record includes a reference indoor environment temperature and a reference outdoor environment temperature in addition to a reference rated capacity parameter, a reference rated frequency, and a reference target exhaust temperature parameter, and the adjustment factor a is determined according to the current environment parameter where the air conditioner is located, which specifically includes:
acquiring a real-time indoor environment temperature and a real-time outdoor environment temperature of an environment where the current air conditioner is located, calculating a first temperature difference between the real-time indoor environment temperature and a reference indoor environment temperature, and calculating a second temperature difference between the real-time outdoor environment temperature and the reference outdoor environment temperature; and then, determining the adjusting factors corresponding to the first temperature difference and the second temperature difference according to the known corresponding relation between the temperature difference and the adjusting factors, and taking the adjusting factors as the adjusting factors corresponding to the current air conditioner. The known corresponding relationship between the temperature difference and the adjustment factor may be all possible relationships reflecting the influence of the indoor ambient temperature and/or the outdoor ambient temperature on the target exhaust gas temperature, for example, the temperature difference and the adjustment factor are linear relationships.
Referring to fig. 2, a block diagram of an embodiment of an apparatus for determining a target discharge air temperature of an electronic expansion valve of an air conditioner according to the present invention is shown.
As shown in fig. 2, the apparatus of this embodiment includes the following structural units, connection relationships among the units, and functions of each unit:
the first obtaining unit 21 is configured to obtain a current rated frequency of the current air conditioner and a current rated capacity parameter representing an operation capacity of the air conditioner.
And the reference data record acquisition unit 22 is used for searching a reference rated capacity parameter consistent with the current rated capacity parameter from a known reference database, and acquiring a reference data record containing the reference rated capacity parameter, wherein the reference data record at least comprises a reference rated frequency and a reference target exhaust temperature parameter.
A current target exhaust temperature parameter obtaining unit 23, configured to calculate a ratio r1 of the current rated frequency to the reference rated frequency, where r1= the current rated frequency/the reference rated frequency; when r1 is less than or equal to 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter/r 1, and the current target exhaust temperature parameter is obtained; at r1 > 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter 2/(1 + r 1), and obtaining a current target exhaust temperature parameter; a is an adjustment factor.
And the target exhaust temperature determining unit 24 is used for determining the target exhaust temperature of the electronic expansion valve of the air conditioner according to the current target exhaust temperature parameter and the corresponding relation between the known target exhaust temperature parameter and the target exhaust temperature, wherein the corresponding relation between the target exhaust temperature parameter and the target exhaust temperature is a positive correlation.
In some other preferred embodiments, the current target exhaust temperature parameter includes a first parameter a and a second parameter b corresponding to the cooling mode, and a third parameter c and a fourth parameter d corresponding to the heating mode, and the target exhaust temperature determining unit 24 determines the current target exhaust temperature of the electronic expansion valve of the air conditioner according to the current target exhaust temperature parameter and the known corresponding relationship between the target exhaust temperature parameter and the target exhaust temperature, specifically including:
acquiring the real-time running frequency f of a compressor of the current air conditioner;
if the current operation mode of the air conditioner is a refrigeration mode, determining the target exhaust temperature of the electronic expansion valve in the refrigeration mode according to a formula Tc = a f + b; tc is the target exhaust temperature of the electronic expansion valve in the refrigeration mode;
if the current operation mode of the air conditioner is a heating mode, determining the target exhaust temperature of the electronic expansion valve in the heating mode according to a formula Th = c × f + d, wherein Th is the target exhaust temperature of the electronic expansion valve in the heating mode.
In some preferred embodiments, the adjustment factor a is a constant.
In some other more preferred embodiments, the apparatus may further include an adjustment factor determination unit for determining an adjustment factor according to an environmental parameter in which the current air conditioner is located. Specifically, the reference data record further includes a reference indoor environment temperature and a reference outdoor environment temperature, and the adjustment factor determining unit determines the adjustment factor according to the environment parameter where the current air conditioner is located, specifically including: the method comprises the steps of obtaining real-time indoor environment temperature and real-time outdoor environment temperature of the environment where the current air conditioner is located, calculating first temperature difference between the real-time indoor environment temperature and reference indoor environment temperature and second temperature difference between the real-time outdoor environment temperature and reference outdoor environment temperature, determining adjusting factors corresponding to the first temperature difference and the second temperature difference according to the known corresponding relation between the temperature difference and the adjusting factors, and using the adjusting factors as the adjusting factors corresponding to the current air conditioner.
The device in each embodiment can be applied to an air conditioner, a corresponding software program is run, and the target exhaust temperature of the electronic expansion valve of the air conditioner is determined according to the process of the method embodiment. And more specific working process and technical effect are described in the corresponding description of the embodiment of the method.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A method of determining a target discharge temperature for an electronic expansion valve of an air conditioner, the method comprising:
acquiring the current rated frequency of the current air conditioner and the current rated capacity parameter representing the operation capacity of the air conditioner;
searching a reference rated capacity parameter consistent with the current rated capacity parameter from a known reference database, and acquiring a reference data record containing the reference rated capacity parameter, wherein the reference data record at least comprises a reference rated frequency and a reference target exhaust temperature parameter;
calculating a ratio r1 of the current rated frequency to the reference rated frequency, r1= current rated frequency/reference rated frequency; when r1 is less than or equal to 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter/r 1, and the current target exhaust temperature parameter is obtained; at r1 > 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter 2/(1 + r 1), and obtaining a current target exhaust temperature parameter; a is an adjustment factor;
determining the target exhaust temperature of the electronic expansion valve of the current air conditioner according to the current target exhaust temperature parameter and the corresponding relation between the known target exhaust temperature parameter and the target exhaust temperature; the corresponding relation between the target exhaust temperature parameter and the target exhaust temperature is a positive correlation.
2. The method according to claim 1, wherein the current target exhaust temperature parameter includes a first parameter a and a second parameter b corresponding to a cooling mode, and a third parameter c and a fourth parameter d corresponding to a heating mode, and the determining the target exhaust temperature of the electronic expansion valve of the current air conditioner according to the current target exhaust temperature parameter and the known corresponding relationship between the target exhaust temperature parameter and the target exhaust temperature specifically includes:
acquiring the real-time running frequency f of a compressor of the current air conditioner;
if the current operation mode of the air conditioner is a refrigeration mode, determining the target exhaust temperature of the electronic expansion valve in the refrigeration mode according to a formula Tc = a f + b; tc is the target exhaust temperature of the electronic expansion valve in the refrigeration mode;
if the current operation mode of the air conditioner is a heating mode, determining the target exhaust temperature of the electronic expansion valve in the heating mode according to a formula Th = c × f + d, wherein Th is the target exhaust temperature of the electronic expansion valve in the heating mode.
3. The method according to claim 1 or 2, characterized in that the adjustment factor a is constant.
4. The method according to claim 1 or 2, wherein the adjustment factor is determined according to the environmental parameter of the current air conditioner.
5. The method according to claim 4, wherein the reference data record further includes a reference indoor ambient temperature and a reference outdoor ambient temperature, and the determining the adjustment factor according to the current environmental parameter of the air conditioner includes:
the method comprises the steps of obtaining real-time indoor environment temperature and real-time outdoor environment temperature of the environment where the current air conditioner is located, calculating the real-time indoor environment temperature, first temperature difference between reference indoor environment temperatures and second temperature difference between the real-time outdoor environment temperatures and reference outdoor environment temperatures, determining an adjusting factor corresponding to the first temperature difference and the second temperature difference according to the corresponding relation of known temperature difference and the adjusting factor, and taking the adjusting factor as the adjusting factor corresponding to the current air conditioner.
6. An apparatus for determining a target discharge temperature for an electronic expansion valve of an air conditioner, the apparatus comprising:
the first obtaining unit is used for obtaining the current rated frequency of the current air conditioner and the current rated capacity parameter representing the operation capacity of the air conditioner;
a reference data record obtaining unit, configured to search a known reference database for a reference rated capacity parameter consistent with the current rated capacity parameter, and obtain a reference data record including the reference rated capacity parameter, where the reference data record further includes at least a reference rated frequency and a reference target exhaust temperature parameter;
a current target exhaust temperature parameter obtaining unit, configured to calculate a ratio r1 of the current rated frequency to the reference rated frequency, where r1= current rated frequency/reference rated frequency; when r1 is less than or equal to 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter/r 1, and the current target exhaust temperature parameter is obtained; at r1 > 1, according to the formula: the current target exhaust temperature parameter = A × reference target exhaust temperature parameter 2/(1 + r 1), and obtaining a current target exhaust temperature parameter; a is an adjustment factor;
the target exhaust temperature determining unit is used for determining the target exhaust temperature of the electronic expansion valve of the current air conditioner according to the current target exhaust temperature parameter and the corresponding relation between the known target exhaust temperature parameter and the target exhaust temperature; the corresponding relation between the target exhaust temperature parameter and the target exhaust temperature is a positive correlation.
7. The apparatus according to claim 6, wherein the current target discharge temperature parameter includes a first parameter a and a second parameter b corresponding to a cooling mode, and a third parameter c and a fourth parameter d corresponding to a heating mode, and the target discharge temperature determining unit determines the target discharge temperature of the electronic expansion valve of the current air conditioner according to the current target discharge temperature parameter and a known corresponding relationship between the target discharge temperature parameter and the target discharge temperature, specifically comprising:
acquiring the real-time running frequency f of a compressor of the current air conditioner;
if the current operation mode of the air conditioner is a refrigeration mode, determining the target exhaust temperature of the electronic expansion valve in the refrigeration mode according to a formula Tc = a f + b; tc is the target exhaust temperature of the electronic expansion valve in the refrigeration mode;
if the current operation mode of the air conditioner is a heating mode, determining the target exhaust temperature of the electronic expansion valve in the heating mode according to a formula Th = c × f + d, wherein Th is the target exhaust temperature of the electronic expansion valve in the heating mode.
8. The apparatus of claim 6 or 7, wherein the adjustment factor A is constant.
9. The apparatus of claim 6 or 7, further comprising:
and the adjusting factor determining unit is used for determining the adjusting factor according to the environmental parameters of the current air conditioner.
10. The apparatus according to claim 9, wherein the reference data record further includes a reference indoor ambient temperature and a reference outdoor ambient temperature, and the adjustment factor determining unit determines the adjustment factor according to an ambient parameter where the current air conditioner is located, specifically including:
the method comprises the steps of obtaining real-time indoor environment temperature and real-time outdoor environment temperature of the environment where the current air conditioner is located, calculating the real-time indoor environment temperature, first temperature difference between reference indoor environment temperatures and second temperature difference between the real-time outdoor environment temperatures and reference outdoor environment temperatures, determining an adjusting factor corresponding to the first temperature difference and the second temperature difference according to the corresponding relation of known temperature difference and the adjusting factor, and taking the adjusting factor as the adjusting factor corresponding to the current air conditioner.
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