CN116025998A - Test method and device for one-to-many air conditioner and one-to-many air conditioner - Google Patents
Test method and device for one-to-many air conditioner and one-to-many air conditioner Download PDFInfo
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Abstract
The application relates to the technical field of air conditioner testing, and discloses a testing method for a one-to-many air conditioner, wherein the one-to-many air conditioner comprises a plurality of indoor heat exchangers, and each indoor heat exchanger is provided with a corresponding electronic expansion valve; the testing method comprises the following steps: obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree; obtaining a target exhaust temperature and a current exhaust temperature; according to the difference value of the target exhaust temperature and the current exhaust temperature, the opening degree adjusting strategy of each electronic expansion valve is determined, the accuracy of adjusting the electronic expansion valve during testing can be improved, and the testing process can reach a better energy efficiency state. The application also discloses a testing device for the one-to-many air conditioner and the one-to-many air conditioner.
Description
Technical Field
The application relates to the technical field of air conditioner testing, and for example relates to a testing method and device for a multi-split air conditioner and the multi-split air conditioner.
Background
Currently, when a multi-split air conditioner is used for frequency setting test, indoor units with the same specification are required to be matched. However, due to the deviation of the production consistency, the indoor units of the same specification may have inconsistent heat exchanger states, electronic expansion valve flow rates and the like. The indoor units with the same parameters are used, but the refrigerating capacity of the indoor units is different, so that the testing process cannot reach the optimal state of energy efficiency.
In the related art, a fixed frequency test method of a multi-split air conditioner is provided. And the opening degree of the electronic expansion valve is adjusted by utilizing the fixed opening degree value of the electronic expansion valve under the fixed frequency condition. The adjustment mode has poor adaptability to different working conditions.
It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a testing method and device for a one-to-many air conditioner and the one-to-many air conditioner, so as to improve the accuracy of adjusting an electronic expansion valve during testing under different working conditions.
In some embodiments, the one-to-many air conditioner includes a plurality of indoor heat exchangers, each indoor heat exchanger having a corresponding electronic expansion valve; the test method comprises the following steps: obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree; obtaining a target exhaust temperature and a current exhaust temperature; and determining an opening degree adjusting strategy for each electronic expansion valve according to the difference value between the target exhaust temperature and the current exhaust temperature.
Optionally, the obtaining the initial opening includes: obtaining an outdoor environment temperature; and determining an initial opening positively correlated to the current outdoor environment temperature according to the current outdoor environment temperature.
Optionally, the determining the initial opening positively correlated to the current outdoor environment temperature includes:
calculation S 0 ＝INT(A+B×(T ao -T b ) Obtaining the initial opening degree;
wherein S is 0 For the initial opening degree, A is a first influence factor, B is a second influence factor, T ao Is the outdoor ambient temperature, T b Is a first calculation factor related to outdoor ambient temperature; a is that>0，B>0。
Optionally, the determining an opening adjustment strategy for each electronic expansion valve according to the difference between the target exhaust temperature and the current exhaust temperature includes:
when the difference value between the target exhaust temperature and the current exhaust temperature is smaller than a first threshold value, respectively adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
when the difference value between the target exhaust temperature and the current exhaust temperature is larger than a second threshold value, simultaneously adjusting each electronic expansion valve according to the target exhaust temperature; the first threshold is less than the second threshold.
Optionally, the adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger includes:
obtaining the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
determining a target step number positively correlated to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
and adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the target step number.
Optionally, the determining the target step number positively correlated to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger includes:
calculation S si ＝INT(d×(ΔT ni -T 2 ) Obtaining the target step number;
wherein S is si The target step number of the ith electronic expansion valve corresponding to the ith indoor heat exchanger is set; d is the third influencing factor, deltaT ni T is the temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger 2 Is a second calculation factor related to the sum of the temperature differences of the inlet temperature and the outlet temperature of each indoor heat exchanger.
Optionally, the second calculation factor T 2 Obtained by the following steps:
calculation of
Obtaining T 2 ；
Wherein T is 2 As a second calculation factor, deltaT ni The temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger is obtained, and n is the number of the indoor heat exchangers.
In some embodiments, a multi-split air conditioner includes a plurality of indoor heat exchangers, each indoor heat exchanger having a corresponding electronic expansion valve; the test device comprises: the first execution module is configured to obtain an initial opening degree and control each electronic expansion valve to operate according to the initial opening degree; an obtaining module configured to obtain a target exhaust temperature and a current exhaust temperature; and the second execution module is configured to determine an opening degree adjustment strategy for each electronic expansion valve according to the difference value of the target exhaust temperature and the current exhaust temperature.
In some embodiments, a test apparatus for a multi-split air conditioner includes a processor and a memory storing program instructions, the processor being configured to perform a test method for a multi-split air conditioner as described above when the program instructions are executed.
In some embodiments, the one-to-many air conditioner comprises: the product body comprises a plurality of indoor heat exchangers, and each indoor heat exchanger is provided with a corresponding electronic expansion valve; the testing device for the one-to-many air conditioner is mounted on the product body.
The test method and device for the one-to-many air conditioner and the one-to-many air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
in the initial stage of the test, the opening degree of each electronic expansion valve is adjusted to the same initial opening degree to operate, so that the exhaust temperature of the compressor is accelerated to approach the target exhaust temperature, and the system operation in the initial stage of the test is stable; and after stable operation, different opening adjustment strategies are carried out on each electronic expansion valve according to the difference value between the target exhaust temperature and the exhaust temperature under the current working condition. When the exhaust temperature approaches to the target exhaust temperature, the electronic expansion valve is finely adjusted according to different conditions of each indoor heat exchanger; when the exhaust temperature deviates from the target exhaust temperature, the electronic expansion valves are simultaneously adjusted. Therefore, the accuracy of adjusting the electronic expansion valve during testing can be improved, and the testing process can reach a better energy efficiency state.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic diagram of a system of a multi-split air conditioner;
FIG. 2 is a flow chart of a testing method for a multi-split air conditioner according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of another testing method for a multi-split air conditioner according to an embodiment of the present disclosure;
FIG. 4 is a flow chart of another testing method for a multi-split air conditioner according to an embodiment of the present disclosure;
FIG. 5 is a flow chart of another testing method for a multi-split air conditioner according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a testing apparatus for a multi-split air conditioner according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another testing apparatus for a multi-split air conditioner according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a multi-split air conditioner provided in an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Fig. 1 shows a schematic system diagram of a multi-split air conditioner.
As shown in fig. 1, the one-to-many air conditioner 100 is composed of an outdoor unit and a plurality of indoor units. The outdoor unit includes a compressor 105, a four-way valve 104, and an outdoor heat exchanger 101; each indoor unit includes an indoor heat exchanger 102 and a corresponding electronic expansion valve 103.
When the fixed frequency test is performed on the multi-split air conditioner, the specifications of the plurality of indoor units are the same, but due to the fact that production consistency is deviated, the indoor units with the same specifications may have inconsistent heat exchanger filling, electronic expansion valve flow and the like, and when control parameters are the same, the refrigerating capacity of the indoor units is different, and the energy efficiency of the system is affected. Therefore, the adjustment strategy for each electronic expansion valve needs to be determined according to different working condition states, so that the test accuracy is improved, and the energy efficiency of the system is improved.
Fig. 2 is a flow chart of a test method for a multi-split air conditioner according to an embodiment of the disclosure. The test method for the one-to-many air conditioner is applied to the system shown in fig. 1, and can be executed in the outdoor unit shown in fig. 1 or by the processor of the one-to-many air conditioner. In the embodiment of the present disclosure, a description will be given of a processor as an execution subject.
Referring to fig. 2, the testing method for the multi-split air conditioner includes:
step S201, obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree.
The initial opening degree may be an initialization value set in advance to stabilize the system operation.
Here, in the initial stage of the test, the opening degree of each electronic expansion valve is adjusted to the same initial opening degree to operate, so that the exhaust temperature of the compressor is accelerated to approach the target exhaust temperature, and the system operation is stable in the initial stage of the test.
Step S202, a target exhaust gas temperature and a current exhaust gas temperature are obtained.
Step S203, determining an opening adjustment strategy for each electronic expansion valve according to the difference between the target exhaust temperature and the current exhaust temperature.
The target discharge temperature is a compressor target parameter corresponding to the current operating condition. And after the system is stable, different opening adjustment strategies are carried out on each electronic expansion valve according to the difference value between the target exhaust temperature and the exhaust temperature under the current working condition.
According to the testing method for the one-to-many air conditioner, when the exhaust temperature is close to the target exhaust temperature, the electronic expansion valve is finely adjusted according to different conditions of each indoor heat exchanger; when the exhaust temperature deviates from the target exhaust temperature, the electronic expansion valves are simultaneously adjusted. Therefore, the accuracy of adjusting the electronic expansion valve during testing can be improved, and the testing process can reach a better energy efficiency state.
Next, with reference to specific embodiments, a description will be given of how to obtain the initial opening degree.
Fig. 3 is a flowchart of a testing method for a multi-split air conditioner according to an embodiment of the disclosure. The test method for the one-to-many air conditioner is applied to the system shown in fig. 1, and in the embodiment of the disclosure, a description is given of a scheme using a processor as an execution main body.
Referring to fig. 3, the testing method for the multi-split air conditioner includes:
step S301, obtaining an outdoor environment temperature.
Step S302, determining an initial opening positively correlated with the current outdoor environment temperature according to the current outdoor environment temperature.
Here, the initial opening degree of the electronic expansion valve is determined according to the outdoor ambient temperature,
the working environment of the outdoor unit can be obtained by acquiring the outdoor environment temperature in real time, so that the opening degree of the electronic expansion valve of the indoor unit in the one-to-many air conditioner is controlled based on the working environment of the outdoor unit, the opening degree of each electronic expansion valve can be regulated along with the change of the outdoor environment temperature in an initial stage, the refrigerant flow in the system can be reasonably controlled, the system can exert the maximum performance, the speed of approaching the exhaust temperature to the target exhaust temperature is accelerated, and the running stability is kept.
Alternatively, when determining the initial opening positively correlated with the current outdoor environment temperature, the determination may be performed by a correspondence relationship between the outdoor environment temperature and the initial opening.
For example, the correspondence between the outdoor ambient temperature and the initial opening degree described above may be in the form of a one-to-one correspondence data table. In this case, the correspondence relationship between the outdoor environment temperature and the initial opening degree may be obtained experimentally in advance. After the current outdoor environment temperature is obtained, the initial opening corresponding to the current outdoor environment temperature can be obtained by inquiring a database.
In some embodiments, the correspondence relationship of the positive correlation between the outdoor ambient temperature and the initial opening degree may be in the form of a formula. After the outdoor environment temperature is obtained, the corresponding initial opening degree can be calculated by taking the outdoor environment temperature as an independent variable of a formula.
Specifically, the above-mentioned determination of the initial opening degree positively correlated with the current outdoor environment temperature includes:
calculation S 0 ＝INT(A+B×(T ao -T b ) Obtaining an initial opening degree;
wherein S is 0 For the initial opening degree, A is a first influence factor, B is a second influence factor, T ao Is the outdoor ambient temperature, T b Is a first calculation factor related to outdoor ambient temperature; a is that>0，B>0.INT is a downward rounding function.
Thus, the initial opening positively related to the outdoor environment temperature is obtained through calculation, and the electronic expansion valves are initialized and adjusted to operate according to the initial opening in an initial operation stage.
Further, the first influence factor a is determined based on the compressor operating frequency.
When the first influence factor a is determined according to the compressor operating frequency, the determination may be performed according to the correspondence between the compressor operating frequency and the first influence factor a.
For example, the correspondence between the compressor operating frequency and the first influence factor a described above may be in the form of a one-to-one correspondence data table. In this case, the correspondence between the compressor operating frequency and the first influence factor a may be obtained experimentally in advance. After the current target operating frequency of the compressor is obtained, the database is queried to obtain a first influence factor A corresponding to the current target operating frequency of the compressor.
In some embodiments, the correspondence between the above-mentioned compressor operating frequency and the first influence factor a may be in the form of a formula. After the current target operating frequency of the compressor is obtained, the current target operating frequency of the compressor is used as an independent variable of a formula, and a corresponding first influence factor A can be calculated.
Specifically, the first influence factor a may be determined as follows:
calculating a=a×f+b to obtain a first influence factor a;
wherein a is a frequency weighting factor, F is the operating frequency of the compressor, and b is a frequency calculation constant; a is more than or equal to 0, and b is more than 0.
Thus, after the target operating frequency of the current compressor is obtained, the first influence factor A can be calculated through the above formula, and then the initial opening degree for adjusting the electronic expansion valve is obtained.
Optionally, the compressor operating frequency and the frequency weighting factor a are in positive correlation; the higher the value of the compressor operating frequency, the higher the value of the frequency weighting factor a. In this embodiment, the value range of a is [0,8].
Optionally, the frequency calculation constant b is used to adjust the initial opening value determined according to the compressor operating frequency, avoiding excessive values, resulting in excessive system operating intensity. b has a value of [100,300]. In this embodiment, the compressor operation frequency and the frequency calculation constant b are in a negative correlation, and the higher the operation frequency of the compressor is, the smaller the value of the frequency calculation constant b is.
Alternatively, the second influence factor B may be determined according to a correspondence between the operating frequency of the compressor and the second influence factor B.
For example, the correspondence between the compressor operating frequency and the second influence factor B described above may be in the form of a one-to-one correspondence data table. In this case, the correspondence between the compressor operating frequency and the second influence factor B may be obtained experimentally in advance. After the current target operating frequency of the compressor is obtained, the database is queried to obtain a second influence factor B corresponding to the current target operating frequency of the compressor.
In this embodiment, the value range of the second influencing factor B is [0,8].
Optionally, the first calculation factor T b Is related to the outdoor ambient temperature. Can be based on a first calculation factor T b And the corresponding relation with the outdoor environment temperature is determined.
For example, the first calculation factor T described above b The correspondence with the outdoor ambient temperature may be in the form of a one-to-one correspondence data table. In this case, the first calculation factor T may be obtained experimentally in advance b And the outdoor environment temperature. After the current outdoor environment temperature is obtained, the first calculation factor T corresponding to the current outdoor environment temperature can be obtained by inquiring a database b 。
Further, a first calculation factor T b The value of (2) is also related to the operation mode of one-to-many air conditioner, and T is carried out in different operation modes under the same outdoor environment temperature b Is different in value. Here, the factor T may be calculated according to the first b And (3) carrying out numerical value determination on the corresponding relation between the outdoor environment temperature and the air conditioner operation mode.
For example, the first calculation factor T described above b The correspondence relationship with the outdoor ambient temperature and the air conditioner operation mode may be in the form of a one-to-one correspondence data table. In this case, the first calculation factor T in the different operation modes can be obtained experimentally in advance b And the outdoor environment temperature. After the current operation mode (such as cooling and heating) and the current outdoor environment temperature are obtained, the corresponding first calculation factor T can be obtained by inquiring the database b 。
Step S303, controlling each electronic expansion valve to operate according to the initial opening degree.
Step S304, a target exhaust gas temperature and a current exhaust gas temperature are obtained.
Step S305, determining an opening adjustment strategy for each electronic expansion valve according to the difference between the target exhaust temperature and the current exhaust temperature.
According to the testing method for the one-to-many air conditioner, in the initial testing period, according to the outdoor environment temperature, the initial opening degree is determined by combining with the running parameters of the whole air conditioner, and the electronic expansion valves are adjusted to the same initial opening degree to run, so that the exhaust temperature of the compressor is accelerated to approach the target exhaust temperature, and the system in the initial testing period is stable to run; after stable operation, different control strategies are carried out on each electronic expansion valve according to the difference value between the target exhaust temperature and the exhaust temperature under the current working condition. Therefore, the accuracy of adjusting the electronic expansion valve during testing can be improved, and the testing process can reach a better energy efficiency state.
The opening degree adjustment strategy of each electronic expansion valve will be described below with reference to specific embodiments.
Fig. 4 is a flowchart of a testing method for a multi-split air conditioner according to an embodiment of the disclosure. The test method for the one-to-many air conditioner is applied to the system shown in fig. 1, and in the embodiment of the disclosure, a description is given of a scheme using a processor as an execution main body.
As shown in fig. 4, the test method for the one-to-many air conditioner includes:
step S401, obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree.
Step S402, a target exhaust gas temperature and a current exhaust gas temperature are obtained.
Step S403, when the difference between the target exhaust temperature and the current exhaust temperature is smaller than the first threshold, the opening of the electronic expansion valve corresponding to each indoor heat exchanger is respectively adjusted according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger.
Here, the first threshold is used for indicating the condition that the current exhaust temperature approaches the target exhaust temperature, and the electronic expansion valve is finely adjusted according to different conditions of each indoor unit at the moment, so that the output conditions of each indoor unit are equivalent, and the energy efficiency of the system is improved. Optionally, the first threshold has a value in the range of [1,3]. In the present embodiment, the first threshold value is 1.
Step S404, when the difference between the target exhaust temperature and the current exhaust temperature is greater than a second threshold value, simultaneously adjusting each electronic expansion valve according to the target exhaust temperature; the first threshold is less than the second threshold.
The second threshold value is used for representing the condition that the current exhaust temperature deviates from the target temperature due to the overregulation, and the electronic expansion valves are synchronously regulated according to the target exhaust temperature. Optionally, the second threshold has a value range of [2,5], and the first threshold is smaller than the second threshold. In this embodiment, the second threshold is 4.
Optionally, adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the inlet temperature of each indoor unit includes:
obtaining the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
determining a target step number positively correlated to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
and adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the target step number.
The specific working conditions of the indoor heat exchangers are determined by obtaining the temperature difference between the inlet temperature and the outlet temperature of the indoor heat exchangers, so that the corresponding electronic expansion valves are finely adjusted, the output conditions of the indoor heat exchangers are equivalent, and the energy efficiency of the system is improved.
Further, in determining the target step number positively related to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger, the corresponding relationship between the temperature difference between the inlet temperature and the outlet temperature and the step number of the electronic expansion valve may be determined.
For example, the correspondence between the temperature difference between the inlet temperature and the outlet temperature and the number of steps of the electronic expansion valve may be in the form of a one-to-one correspondence data table. In this case, the corresponding relationship between the temperature difference between the inlet temperature and the outlet temperature of the heat exchanger and the number of steps of the electronic expansion valve can be obtained in advance through an experimental manner. After the temperature difference between the inlet temperature and the outlet temperature of the current indoor heat exchanger is obtained, the target step number of the electronic expansion valve corresponding to the temperature difference between the inlet temperature and the outlet temperature of the indoor heat exchanger can be obtained by inquiring a database.
In some embodiments, the correspondence between the temperature difference between the inlet temperature and the outlet temperature and the number of steps of the electronic expansion valve may be in the form of a formula. After the temperature difference between the inlet temperature and the outlet temperature of the current indoor heat exchanger is obtained, the temperature difference is used as an independent variable of a formula, and the target step number of the corresponding electronic expansion valve can be calculated.
Specifically, determining a target number of steps that is positively correlated to a temperature difference between an inlet temperature and an outlet temperature of each indoor heat exchanger includes:
calculation S si ＝INT(d×(ΔT ni -T 2 ) Obtaining a target step number;
wherein S is si The target step number of the ith electronic expansion valve corresponding to the ith indoor heat exchanger is set; d is the third influencing factor, deltaT ni T is the temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger 2 Is a second calculation factor related to the sum of the temperature differences of the inlet temperature and the outlet temperature of each indoor heat exchanger.
In this way, the target step number positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger is adopted, and then the opening of the electronic expansion valve corresponding to the indoor heat exchanger is adjusted according to the target step number, so that the fine adjustment of each electronic expansion valve according to different conditions of each indoor machine is realized, the output conditions of each indoor machine are equivalent, and the energy efficiency of the system is improved.
Wherein the second calculation factor T 2 Obtained by the following steps:
calculation of
Obtaining T 2 ；
Wherein T is 2 As a second calculation factor, deltaT ni The temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger is obtained, and n is the number of the indoor heat exchangers.
In this way, the average temperature difference between the inlet temperature and the outlet temperature of the indoor side of the multi-split air conditioner is determined by the ratio of the sum of the temperature differences between the inlet temperature and the outlet temperature of the n indoor heat exchangers to n, and then the opening adjustment strategy of the corresponding electronic expansion valve is determined by the difference between the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger and the average temperature difference.
In this way, by adopting the test method for the one-to-many air conditioner provided by the embodiment of the disclosure, in the initial stage of the test, according to the outdoor environment temperature, the initial opening degree is determined by combining the running parameters of the whole air conditioner, and the electronic expansion valve opening degrees are adjusted to the same initial opening degree to run, so that the exhaust temperature of the compressor is accelerated to approach the target exhaust temperature, and the system in the initial stage of the test is stable to run; and after stable operation, different opening adjustment strategies are carried out on each electronic expansion valve according to the difference value between the target exhaust temperature and the exhaust temperature under the current working condition. Therefore, the accuracy of adjusting the electronic expansion valve during testing can be improved, and the testing process can reach a better energy efficiency state.
The practical application of the present embodiment will be described with reference to the following specific examples.
Fig. 5 is a flowchart of a testing method for a multi-split air conditioner according to an embodiment of the disclosure. The test method for the one-to-many air conditioner is applied to the system shown in fig. 1, and in the embodiment of the disclosure, a description is given of a scheme using a processor as an execution main body.
As shown in fig. 5, the test method for the one-to-many air conditioner includes:
step S501, entering a constant frequency test mode to obtain an outdoor environment temperature T ao 。
Step S502, determining an initial opening S according to the outdoor environment temperature 0 。
Here, S is determined by 0 ：
S 0 ＝INT(a×F+b+B×(T ao -T b ))；
Wherein S is 0 For the initial opening degree, a is a frequency weighting factor, F is the operating frequency of the compressor, B is a frequency calculation constant, B is a second influence factor, T ao Is the outdoor ambient temperature, T b Is a first calculation factor related to outdoor ambient temperature; a is more than or equal to 0, b is more than 0, B>0; INT is a downward rounding function.
Step S503, controlling each electronic expansion valve according to S 0 Run for a first period of time t 1 . Wherein t is less than or equal to 2min 1 ≤8min。
Step S504, determining a target exhaust temperature T corresponding to the current working condition ds And the current exhaust temperature T d And simultaneously performs target exhaust gas proportional-integral-derivative (Proportion Integral Differential, PID) adjustment for each electronic expansion valve. And the target exhaust PID is used as main regulation logic to realize synchronous regulation of each electronic expansion valve.
Step S505, obtain T ds And T d Difference Δtd= |t ds -T d |。
Step S506, at DeltaT d ＜T 1 And obtaining the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger. T is not less than 1 1 In the method, the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger is calculated by the following method:
ΔT ni ＝T ini -T oni the method comprises the steps of carrying out a first treatment on the surface of the Wherein DeltaT ni T is the temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger ini For the inlet temperature of the ith indoor heat exchanger, T oni Is the outlet temperature of the ith heat exchanger.
Step S507, calculating a second calculationFactor T 2 。
Here, the second calculation factor T 2 Obtained by the following steps:
calculation of
Obtaining T 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is 2 As a second calculation factor, deltaT ni The temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger is obtained, and n is the number of the indoor heat exchangers.
Step S508, at T 2 ≤T 3 And when the electronic expansion valves are operated, the opening degree of each electronic expansion valve is kept to be operated currently. T is more than or equal to 0 3 ≤2。
Step S509, at T 2 ＞T 3 And determining the target step number positively related to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger.
Here, T is 2 Each electronic expansion valve is regulated for the target. The target number of steps is obtained by:
calculation S si ＝INT(d×(ΔT ni -T 2 ) Obtaining a target step number;
wherein S is si The target step number of the ith electronic expansion valve corresponding to the ith indoor heat exchanger is set; d is the third influencing factor, deltaT ni T is the temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger 2 Is the second calculation factor.
Step S510, controlling each electronic expansion valve to a second time period t 2 For the period, the target number of steps is adjusted per period.
Step S511, determining DeltaT d Whether or not it is greater than or equal to T 4 . At DeltaT d ≥T 4 Returning to step S504, and simultaneously performing target exhaust PID control on each expansion valve on the basis of the current opening according to the target exhaust temperature; at DeltaT d ＜T 4 When the operation returns to step S506, the fine adjustment of each electronic expansion valve is continued according to the condition of each indoor heat exchanger. T (T) 4 The value range of (2) is [2,5]]And T is 1 ＜T 4 。
Fig. 6 is a schematic diagram of a testing device for a multi-split air conditioner according to an embodiment of the present application. The testing device for the one-to-many air conditioner is applied to the system shown in fig. 1 and can be realized by software, hardware or a combination of the two modes.
Referring to fig. 6, an embodiment of the disclosure provides a testing apparatus 600 for a multi-split air conditioner, including a first executing module 61, an obtaining module 62, and a second executing module 63.
A first execution module 61 configured to obtain an initial opening degree, and control each electronic expansion valve to operate according to the initial opening degree;
an obtaining module 62 configured to obtain a target exhaust temperature and a current exhaust temperature;
the second execution module 63 is configured to determine an opening degree adjustment strategy for each electronic expansion valve according to a difference between the target exhaust temperature and the current exhaust temperature.
Fig. 7 is a schematic diagram of a testing device for a multi-split air conditioner according to an embodiment of the present application. Referring to fig. 7, the test apparatus 700 for a multi-split air conditioner includes:
a processor (processor) 71 and a memory (memory) 72. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 73 and a bus 74. The processor 71, the communication interface 73, and the memory 72 may communicate with each other via the bus 74. Communication interface 73 may be used for information transfer. The processor 71 may invoke logic instructions in the memory 72 to perform the test method for a one-to-many air conditioner of the above-described embodiments.
Further, the logic instructions in the memory 72 described above may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 72 serves as a computer readable storage medium for storing a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 71 executes the functional application and data processing by executing the program instructions/modules stored in the memory 72, i.e., implements the test method for the one-to-many air conditioner in the above embodiment.
As shown in conjunction with fig. 8, an embodiment of the present disclosure provides a one-to-many air conditioner 100, comprising: the product body comprises a plurality of indoor heat exchangers, and each indoor heat exchanger is provided with a corresponding electronic expansion valve; and the test apparatus 600 (700) for a multi-split air conditioner as described above. The test device 600 (700) for a one-to-many air conditioner is mounted to a product body. The mounting relationships described herein are not limited to placement within a product, but include mounting connections to other components of a product, including but not limited to physical, electrical, or signal transmission connections, etc. Those skilled in the art will appreciate that the test apparatus 600 (700) for a multi-split air conditioner may be adapted to a viable product body to achieve other viable embodiments.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described test method for a one-to-many air conditioner.
The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, randomAccess Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A test method for a one-to-many air conditioner, wherein the one-to-many air conditioner comprises a plurality of indoor heat exchangers, each indoor heat exchanger is provided with a corresponding electronic expansion valve;
the test method comprises the following steps:
obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree;
obtaining a target exhaust temperature and a current exhaust temperature;
and determining an opening degree adjusting strategy for each electronic expansion valve according to the difference value between the target exhaust temperature and the current exhaust temperature.
2. The method of testing according to claim 1, wherein the obtaining an initial opening degree comprises:
obtaining an outdoor environment temperature;
and determining an initial opening positively correlated to the current outdoor environment temperature according to the current outdoor environment temperature.
3. The test method according to claim 2, wherein said determining an initial opening positively correlated to said current outdoor ambient temperature comprises:
calculation S 0 ＝INT(A+B×(T ao -T b ) Obtaining the initial opening degree;
wherein S is 0 For the initial opening degree, A is a first influence factor, B is a second influence factor, T ao Is the outdoor ambient temperature, T b Is a first calculation factor related to outdoor ambient temperature; a is that>0，B>0。
4. The test method according to claim 1, wherein the determining an opening degree adjustment strategy for each electronic expansion valve according to the difference between the target exhaust temperature and the current exhaust temperature includes:
when the difference value between the target exhaust temperature and the current exhaust temperature is smaller than a first threshold value, respectively adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
when the difference value between the target exhaust temperature and the current exhaust temperature is larger than a second threshold value, simultaneously adjusting each electronic expansion valve according to the target exhaust temperature; the first threshold is less than the second threshold.
5. The method according to claim 4, wherein the adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger comprises:
obtaining the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
determining a target step number positively correlated to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;
and adjusting the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the target step number.
6. The method of testing according to claim 5, wherein determining the target number of steps positively correlated to the difference in inlet temperature and outlet temperature of each indoor heat exchanger comprises:
calculation S si ＝INT(d×(ΔT ni -T 2 ) Obtaining the target step number;
wherein S is si The target step number of the ith electronic expansion valve corresponding to the ith indoor heat exchanger is set; d is the third influencing factor, deltaT ni T is the temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger 2 Is a second calculation factor related to the sum of the temperature differences of the inlet temperature and the outlet temperature of each indoor heat exchanger.
7. The test method according to claim 6, wherein the second calculation factor T 2 Obtained by the following steps:
calculation of
Obtaining T 2 ；
Wherein T is 2 As a second calculation factor, deltaT ni The temperature difference between the inlet temperature and the outlet temperature of the ith indoor heat exchanger is obtained, and n is the number of the indoor heat exchangers.
8. A testing device for a multi-split air conditioner, wherein the multi-split air conditioner comprises a plurality of indoor heat exchangers, and each indoor heat exchanger is provided with a corresponding electronic expansion valve;
the test device comprises:
the first execution module is configured to obtain an initial opening degree and control each electronic expansion valve to operate according to the initial opening degree;
an obtaining module configured to obtain a target exhaust temperature and a current exhaust temperature;
and the second execution module is configured to determine an opening degree adjustment strategy for each electronic expansion valve according to the difference value of the target exhaust temperature and the current exhaust temperature.
9. A test apparatus for a multi-split air conditioner comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the test method for a multi-split air conditioner of any one of claims 1 to 7 when the program instructions are run.
10. A multi-split air conditioner, comprising:
the product body comprises a plurality of indoor heat exchangers, and each indoor heat exchanger is provided with a corresponding electronic expansion valve;
a test device for a multi-split air conditioner as claimed in claim 8 or 9, mounted to said product body.
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| CN202310196324.6A CN116025998A (en) | 2023-03-02 | 2023-03-02 | Test method and device for one-to-many air conditioner and one-to-many air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310196324.6A CN116025998A (en) | 2023-03-02 | 2023-03-02 | Test method and device for one-to-many air conditioner and one-to-many air conditioner |
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