Test method and device for one-to-many air conditioners, one-to-many air conditioners

Abstract

This application relates to the field of air conditioning testing technology and discloses a testing method for a one-to-many air conditioner. The one-to-many air conditioner includes multiple indoor heat exchangers, each with a corresponding electronic expansion valve. The testing method includes: obtaining an initial opening and controlling each electronic expansion valve to operate according to the initial opening; obtaining a target exhaust temperature and a current exhaust temperature; and determining an opening adjustment strategy for each electronic expansion valve based on the difference between the target exhaust temperature and the current exhaust temperature. This improves the accuracy of adjusting the electronic expansion valve during testing, allowing the testing process to achieve better energy efficiency. This application also discloses a testing device for a one-to-many air conditioner and a one-to-many air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning testing, for example, to a testing method and device for a one-to-many air-conditioner, and a one-to-many air-conditioner. Background Art

[0002] Currently, fixed-frequency testing of multiple air conditioners requires indoor units of the same specifications. However, due to variations in production consistency, indoor units of the same specifications may exhibit inconsistencies in heat exchanger status, electronic expansion valve flow, and other parameters. This results in varying cooling capacities even when using units with identical parameters, preventing optimal energy efficiency during testing.

[0003] Related technologies offer a fixed-frequency testing method for a single-drive, multi-unit air conditioner. This method uses a fixed electronic expansion valve opening value to adjust the opening of the electronic expansion valve under fixed-frequency conditions. However, this adjustment method has limited adaptability to varying operating conditions.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a testing method and device for a one-to-many air conditioner, and a one-to-many air conditioner, so as to improve the accuracy of adjusting an electronic expansion valve during testing under different operating conditions.

[0007] In some embodiments, the one-to-many air conditioner includes multiple indoor heat exchangers, each indoor heat exchanger has a corresponding electronic expansion valve; the testing method includes: obtaining an initial opening, controlling each electronic expansion valve to operate according to the initial opening; obtaining a target exhaust temperature and a current exhaust temperature; and determining an opening adjustment strategy for each electronic expansion valve based on the difference between the target exhaust temperature and the current exhaust temperature.

[0008] Optionally, obtaining the initial opening degree includes: obtaining the outdoor ambient temperature; and determining, based on the current outdoor ambient temperature, an initial opening degree that is positively correlated with the current outdoor ambient temperature.

[0009] Optionally, determining the initial opening degree that is positively correlated with the current outdoor ambient temperature includes:

[0010] Calculate S0 = INT(A+B×(Tao -T b )), obtaining the initial opening;

[0011] Among them, S0 is the initial opening, A is the first influencing factor, B is the second influencing factor, T ao is the outdoor ambient temperature, T b is the first calculation factor related to the outdoor ambient temperature; A>0, B>0.

[0012] Optionally, determining an opening adjustment strategy for each electronic expansion valve according to a difference between the target exhaust temperature and the current exhaust temperature includes:

[0013] When the difference between the target exhaust temperature and the current exhaust temperature is less than a first threshold, 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;

[0014] When the difference between the target exhaust temperature and the current exhaust temperature is greater than a second threshold, each electronic expansion valve is adjusted simultaneously according to the target exhaust temperature; the first threshold is less than the second threshold.

[0015] Optionally, 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:

[0016] Obtain the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;

[0017] Determine a target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;

[0018] The opening of the electronic expansion valve corresponding to each indoor heat exchanger is adjusted according to the target number of steps.

[0019] Optionally, determining a target number of steps that is positively correlated with a temperature difference between an inlet temperature and an outlet temperature of each indoor heat exchanger includes:

[0020] Calculate S si =INT(d×(ΔT ni -T2)), obtain the target number of steps;

[0021] Among them, S si is the target number of steps of the i-th electronic expansion valve corresponding to the i-th indoor heat exchanger; d is the third influencing factor, ΔT ni is the temperature difference between the inlet temperature and the outlet temperature of the i-th indoor heat exchanger, and T2 is a second calculation factor related to the sum of the temperature differences between the inlet temperature and the outlet temperature of each indoor heat exchanger.

[0022] Optionally, the second calculation factor T2 is obtained by:

[0023] calculate Get T2;

[0024] Where T2 is the second calculation factor, ΔT ni is the temperature difference between the inlet and outlet temperatures of the i-th indoor heat exchanger, and n is the number of indoor heat exchangers.

[0025] In some embodiments, a one-to-many air conditioner includes multiple indoor heat exchangers, each indoor heat exchanger has a corresponding electronic expansion valve; the testing device includes: a first execution module, configured to obtain an initial opening and control each electronic expansion valve to operate according to the initial opening; an acquisition module, configured to obtain a target exhaust temperature and a current exhaust temperature; a second execution module, configured to determine an opening adjustment strategy for each electronic expansion valve based on the difference between the target exhaust temperature and the current exhaust temperature.

[0026] In some embodiments, a testing device for a one-to-many air conditioner includes a processor and a memory storing program instructions, and the processor is configured to execute the testing method for a one-to-many air conditioner as described above when running the program instructions.

[0027] In some embodiments, the one-to-many air conditioner includes: a product body, including multiple indoor heat exchangers, each indoor heat exchanger has a corresponding electronic expansion valve; a test device for the one-to-many air conditioner as described above is installed on the product body.

[0028] The testing method and device for a one-to-many air conditioner and the one-to-many air conditioner provided in the embodiments of the present disclosure can achieve the following technical effects:

[0029] At the beginning of the test, the opening of each electronic expansion valve is adjusted to the same initial opening, accelerating the compressor exhaust temperature to approach the target exhaust temperature, ensuring stable system operation during the initial test. After stable operation, different opening adjustment strategies are implemented for each electronic expansion valve based on the difference between the target exhaust temperature and the exhaust temperature under the current operating conditions. When the exhaust temperature approaches the target exhaust temperature, the electronic expansion valve is fine-tuned according to the different conditions of each indoor heat exchanger. When the exhaust temperature deviates from the target exhaust temperature, all electronic expansion valves are adjusted simultaneously. This improves the accuracy of electronic expansion valve adjustment during testing, achieving better energy efficiency during the test process.

[0030] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0032] Figure 1 This is a system diagram of a one-to-many air conditioner;

[0033] Figure 2 This is a flow chart of a testing method for a one-to-many air conditioner provided by an embodiment of the present disclosure;

[0034] Figure 3 1 is a flow chart of another testing method for a one-to-many air conditioner provided by an embodiment of the present disclosure;

[0035] Figure 4 1 is a flow chart of another testing method for a one-to-many air conditioner provided by an embodiment of the present disclosure;

[0036] Figure 5 1 is a flow chart of another testing method for a one-to-many air conditioner provided by an embodiment of the present disclosure;

[0037] Figure 6 1 is a schematic diagram of a test device for a one-to-many air conditioner system provided by an embodiment of the present disclosure;

[0038] Figure 7 is a schematic diagram of another testing device for a one-to-many air conditioner provided by an embodiment of the present disclosure;

[0039] Figure 8 It is a schematic diagram of a one-to-many air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0041] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0042] Unless otherwise stated, the term "plurality" means two or more.

[0043] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0044] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0045] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0046] Figure 1 Shown is a system schematic diagram of a one-to-many air conditioner.

[0047] like Figure 1 As shown, the one-to-many air conditioner 100 consists of an outdoor unit and multiple 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.

[0048] When performing fixed-frequency testing on the aforementioned one-to-many air conditioner system, although the multiple indoor units use the same specifications, due to variations in production consistency, these units may have inconsistencies in heat exchanger loading, electronic expansion valve flow rates, and other parameters. This results in different cooling capacities for the indoor units even when the control parameters are the same, impacting system energy efficiency. Therefore, it is necessary to determine the adjustment strategy for each electronic expansion valve based on different operating conditions to improve test accuracy and enhance system energy efficiency.

[0049] Figure 2 This is a flow chart of a test method for a one-to-many air conditioner provided by an embodiment of the present disclosure. Figure 1 In the system shown, Figure 1 The outdoor unit shown in the figure can also be executed by the processor of a one-to-many air conditioner. In the embodiment of the present disclosure, the solution is described with the processor as the execution subject.

[0050] Combine Figure 2As shown, the test method for a one-to-many air conditioner includes:

[0051] Step S201: obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree.

[0052] The initial opening can be an initialization value set in advance to stabilize the system operation.

[0053] Here, at the initial stage of the test, the openings of the electronic expansion valves are adjusted to the same initial openings for operation, accelerating the compressor exhaust temperature to approach the target exhaust temperature, so that the system operates stably at the initial stage of the test.

[0054] Step S202: Obtain the target exhaust temperature and the current exhaust temperature.

[0055] 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.

[0056] The target discharge temperature is the compressor's target parameter for the current operating conditions. By determining the difference between the target discharge temperature and the current discharge temperature under different test conditions, and after system stabilization, different opening adjustment strategies are implemented for each electronic expansion valve based on the difference between the target discharge temperature and the discharge temperature under the current operating conditions.

[0057] The disclosed embodiments provide a testing method for a multi-unit air conditioner. When the exhaust temperature approaches the target exhaust temperature, the electronic expansion valve is fine-tuned based on the individual conditions of each indoor heat exchanger. When the exhaust temperature deviates from the target exhaust temperature, all electronic expansion valves are adjusted simultaneously. This improves the accuracy of electronic expansion valve adjustment during testing, resulting in better energy efficiency during the testing process.

[0058] How to obtain the initial opening degree is described below with reference to specific embodiments.

[0059] Figure 3 This is a flow chart of a test method for a one-to-many air conditioner provided by an embodiment of the present disclosure. Figure 1 In the system shown, in the embodiment of the present disclosure, the solution is described with the processor as the execution body.

[0060] Combine Figure 3 As shown, the test method for a one-to-many air conditioner includes:

[0061] Step S301: Obtain the outdoor ambient temperature.

[0062] Step S302: determining an initial opening degree that is positively correlated with the current outdoor ambient temperature according to the current outdoor ambient temperature.

[0063] Here, the initial opening of the electronic expansion valve is determined according to the outdoor ambient temperature.

[0064] By acquiring the outdoor ambient temperature in real time, the working environment of the outdoor unit can be known, and the opening of the electronic expansion valve of the indoor unit in the one-to-multi air conditioner can be controlled based on the working environment of the outdoor unit, so that the opening of each electronic expansion valve can be adjusted in the initial stage according to the changes in the outdoor ambient temperature to ensure that the refrigerant flow in the system can be reasonably controlled, so that the system can achieve maximum performance, thereby accelerating the speed at which the exhaust temperature approaches the target exhaust temperature and maintaining stable operation.

[0065] Optionally, when determining the initial opening degree that is positively correlated with the current outdoor ambient temperature, the determination may be made based on a corresponding relationship between the outdoor ambient temperature and the initial opening degree.

[0066] For example, the aforementioned correspondence between the outdoor ambient temperature and the initial opening degree can be in the form of a one-to-one correspondence data table. In this case, the correspondence between the outdoor ambient temperature and the initial opening degree can be obtained in advance through experiments. After obtaining the current outdoor ambient temperature, the initial opening degree corresponding to the current outdoor ambient temperature can be obtained by querying the database.

[0067] In some embodiments, the positive correlation between the outdoor ambient temperature and the initial opening can be in the form of a formula. After obtaining the outdoor ambient temperature, it is used as the independent variable of the formula to calculate the corresponding initial opening.

[0068] Specifically, the above-mentioned determination of the initial opening degree positively correlated with the current outdoor ambient temperature includes:

[0069] Calculate S0 = INT(A+B×(T ao -T b )), get the initial opening;

[0070] Among them, S0 is the initial opening, A is the first influencing factor, B is the second influencing factor, T ao is the outdoor ambient temperature, T b is the first calculation factor related to the outdoor ambient temperature; A>0, B>0. INT is the floor function.

[0071] In this way, the initial opening degree that is positively correlated with the outdoor ambient temperature is obtained by calculation, thereby initializing and adjusting each electronic expansion valve so that it operates according to the initial opening degree in the initial operation stage.

[0072] Furthermore, the first impact factor A is determined according to the operating frequency of the compressor.

[0073] When the first influencing factor A is determined according to the operating frequency of the compressor, the determination can be performed based on the corresponding relationship between the operating frequency of the compressor and the first influencing factor A.

[0074] For example, the aforementioned correspondence between the compressor operating frequency and the first influencing factor A can 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 influencing factor A can be obtained in advance through experiments. After obtaining the current compressor target operating frequency, the first influencing factor A corresponding to the current compressor target operating frequency can be obtained by querying the database.

[0075] In some embodiments, the correspondence between the compressor operating frequency and the first impact factor A may be in the form of a formula. After obtaining the current compressor target operating frequency, the corresponding first impact factor A may be calculated by using it as an independent variable of the formula.

[0076] Specifically, the first impact factor A can be determined in the following manner:

[0077] Calculate A = a × F + b to obtain the first impact factor A;

[0078] Wherein, a is the frequency weighting factor, F is the compressor operating frequency, and b is the frequency calculation constant; a≥0, b>0.

[0079] In this way, after obtaining the current target operating frequency of the compressor, the first influencing factor A can be calculated using the above formula, thereby obtaining the initial opening degree for adjusting the electronic expansion valve.

[0080] Optionally, the compressor operating frequency is positively correlated with the frequency weighting factor a; the higher 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].

[0081] Optionally, the frequency calculation constant b is used to adjust the initial opening value determined by the compressor operating frequency to prevent an excessively large value from causing excessive system operation intensity. The value of b ranges from [100, 300]. In this embodiment, the compressor operating frequency and the frequency calculation constant b are negatively correlated; the higher the compressor operating frequency, the smaller the value of the frequency calculation constant b.

[0082] Optionally, the second impact factor B can be determined based on a corresponding relationship between the compressor operating frequency and the second impact factor B.

[0083] For example, the aforementioned correspondence between the compressor operating frequency and the second influencing factor B can 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 influencing factor B can be obtained in advance through experiments. After obtaining the current compressor target operating frequency, the second influencing factor B corresponding to the current compressor target operating frequency can be obtained by querying the database.

[0084] In this embodiment, the value range of the second impact factor B is [0, 8].

[0085] Optionally, the first calculation factor T b Related to the outdoor ambient temperature. b The corresponding relationship between the temperature and the outdoor ambient temperature is determined.

[0086] For example, the first calculation factor T b The corresponding relationship between the temperature and the outdoor ambient temperature can be in the form of a one-to-one correspondence data table. In this case, the first calculation factor T can be obtained in advance through experiments. b The corresponding relationship between the current outdoor ambient temperature and the outdoor ambient temperature. After obtaining the current outdoor ambient temperature, the first calculation factor T corresponding to the current outdoor ambient temperature can be obtained by querying the database. b .

[0087] Furthermore, the first calculation factor T b The value of is also related to the operation mode of the one-to-many air conditioner. At the same outdoor ambient temperature, under different operation modes, T b Here, the first calculation factor T b The numerical value is determined based on the correspondence between the outdoor ambient temperature and the air conditioning operation mode.

[0088] For example, the first calculation factor T b The correspondence between the outdoor ambient temperature and the air conditioning operation mode can be in the form of a one-to-one correspondence data table. In this case, the first calculation factor T under different operation modes can be obtained in advance through experiments. b The corresponding relationship between the temperature and the outdoor environment. After obtaining the current operating mode (such as cooling, heating), and the current outdoor environment temperature, the corresponding first calculation factor T can be obtained by querying the database. b .

[0089] Step S303: Control each electronic expansion valve to operate according to the initial opening degree.

[0090] Step S304: Obtain the target exhaust temperature and the current exhaust temperature.

[0091] 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.

[0092] The disclosed embodiment provides a testing method for a multi-unit air conditioner. Initially, the test determines the initial opening based on the outdoor ambient temperature and the air conditioner's operating parameters. Each electronic expansion valve is then adjusted to the same initial opening to accelerate the compressor exhaust temperature toward the target exhaust temperature, ensuring stable system operation during the initial test. After stable operation, each electronic expansion valve is controlled differently based on the difference between the target exhaust temperature and the exhaust temperature under the current operating conditions. This improves the accuracy of electronic expansion valve adjustment during testing and allows for greater energy efficiency during the test.

[0093] The following describes the opening adjustment strategy of each electronic expansion valve in conjunction with specific embodiments.

[0094] Figure 4 This is a flow chart of a test method for a one-to-many air conditioner provided by an embodiment of the present disclosure. Figure 1 In the system shown, in the embodiment of the present disclosure, the solution is described with the processor as the execution body.

[0095] like Figure 4 As shown, the test method for a one-to-many air conditioner includes:

[0096] Step S401: obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree.

[0097] Step S402: Obtain the target exhaust temperature and the current exhaust temperature.

[0098] Step S403 : When the difference between the target exhaust temperature and the current exhaust temperature is less than a first threshold, the opening of the electronic expansion valve corresponding to each indoor heat exchanger is adjusted according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger.

[0099] Here, the first threshold indicates when the current exhaust temperature approaches the target exhaust temperature. At this point, the electronic expansion valve is fine-tuned based on the different conditions of each indoor unit to ensure that the output of each indoor unit is consistent, thereby improving system energy efficiency. Optionally, the first threshold can have a value range of [1, 3]. In this embodiment, the first threshold is 1.

[0100] Step S404: When the difference between the target exhaust temperature and the current exhaust temperature is greater than a second threshold, each electronic expansion valve is adjusted simultaneously according to the target exhaust temperature; the first threshold is less than the second threshold.

[0101] The second threshold is used to indicate a situation where the current exhaust temperature deviates from the target temperature due to over-regulation. In this case, the electronic expansion valves are synchronously adjusted based on the target exhaust temperature. Optionally, the second threshold has a value range of [2, 5], and the first threshold is less than the second threshold. In this embodiment, the second threshold is 4.

[0102] 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:

[0103] Obtain the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;

[0104] Determine a target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger;

[0105] Adjust the opening of the electronic expansion valve corresponding to each indoor heat exchanger according to the target number of steps.

[0106] By obtaining the temperature difference between the inlet and outlet temperatures of each indoor heat exchanger, the specific operating conditions of each indoor heat exchanger are determined, and the corresponding electronic expansion valve is fine-tuned to make the output of each indoor heat exchanger equivalent and improve the energy efficiency of the system.

[0107] Furthermore, when determining the target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger, it can be determined based on the corresponding relationship between the temperature difference between the inlet temperature and the outlet temperature and the number of steps of the electronic expansion valve.

[0108] For example, the aforementioned correspondence between the temperature difference between the inlet and outlet temperatures and the number of electronic expansion valve steps can be in the form of a one-to-one data table. In this case, the correspondence between the temperature difference between the heat exchanger's inlet and outlet temperatures and the number of electronic expansion valve steps can be obtained in advance through experimental means. After obtaining the current temperature difference between the inlet and outlet temperatures of the indoor heat exchanger, the target number of electronic expansion valve steps corresponding to the temperature difference between the inlet and outlet temperatures of the indoor heat exchanger can be obtained by querying the database.

[0109] In some embodiments, the relationship between the temperature difference between the inlet and outlet temperatures and the number of steps of the electronic expansion valve can be expressed in the form of a formula. After obtaining the temperature difference between the inlet and outlet temperatures of the current indoor heat exchanger, this difference is used as the independent variable in the formula to calculate the corresponding target number of steps of the electronic expansion valve.

[0110] Specifically, determining a target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger includes:

[0111] Calculate S si =INT(d×(ΔT ni -T2)), get the target number of steps;

[0112] Among them, S si is the target number of steps of the i-th electronic expansion valve corresponding to the i-th indoor heat exchanger; d is the third influencing factor, ΔT ni is the temperature difference between the inlet temperature and the outlet temperature of the i-th indoor heat exchanger, and T2 is a second calculation factor related to the sum of the temperature differences between the inlet temperature and the outlet temperature of each indoor heat exchanger.

[0113] In this way, by adjusting the target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger, and then adjusting the opening of the electronic expansion valve corresponding to the indoor heat exchanger according to the target number of steps, fine-tuning of each electronic expansion valve according to the different conditions of each indoor unit can be achieved, which can make the output of each indoor unit equivalent and improve the energy efficiency of the system.

[0114] The second calculation factor T2 is obtained as follows:

[0115] calculate Get T2;

[0116] Where T2 is the second calculation factor, ΔT ni is the temperature difference between the inlet and outlet temperatures of the i-th indoor heat exchanger, and n is the number of indoor heat exchangers.

[0117] In this way, the average temperature difference between the inlet temperature and outlet temperature of the heat exchanger on the indoor side of the one-to-many air conditioner is determined by the ratio of the sum of the temperature differences between the inlet temperature and the outlet temperature of 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.

[0118] Thus, using the test method for a one-to-many air conditioner provided by the embodiment of the present disclosure, at the initial stage of the test, the initial opening is determined based on the outdoor ambient temperature and the air conditioner operating parameters. The openings of each electronic expansion valve are then adjusted to the same initial opening for operation, accelerating the compressor exhaust temperature to approach the target exhaust temperature, ensuring stable system operation during the initial stage of the test. After stable operation, different opening adjustment strategies are implemented for each electronic expansion valve based on the difference between the target exhaust temperature and the exhaust temperature under the current operating conditions. This improves the accuracy of electronic expansion valve adjustment during the test, allowing the test process to achieve better energy efficiency.

[0119] The practical application of this solution is described below with reference to specific embodiments.

[0120] Figure 5 This is a flow chart of a test method for a one-to-many air conditioner provided by an embodiment of the present disclosure. Figure 1 In the system shown, in the embodiment of the present disclosure, the solution is described with the processor as the execution body.

[0121] like Figure 5 As shown, the test method for a one-to-many air conditioner includes:

[0122] Step S501: Enter the fixed frequency test mode and obtain the outdoor ambient temperature T ao .

[0123] Step S502: determining an initial opening degree S0 according to the outdoor ambient temperature.

[0124] Here, S0 is determined as follows:

[0125] S0=INT(a×F+b+B×(T ao -T b ));

[0126] Among them, S0 is the initial opening, a is the frequency weighting factor, F is the compressor operating frequency, b is the frequency calculation constant, B is the second influencing factor, T ao is the outdoor ambient temperature, T b is the first calculation factor related to the outdoor ambient temperature; a≥0, b>0, B>0; INT is a rounding-down function.

[0127] Step S503: Control each electronic expansion valve to operate for a first time duration t1 according to S0, wherein 2 min ≤ t1 ≤ 8 min.

[0128] Step S504: determine the target exhaust temperature T corresponding to the current working condition. ds and the current exhaust temperature T d , and simultaneously performs Proportional Integral Differential (PID) adjustment on each electronic expansion valve at the same time. Using the target exhaust PID as the primary adjustment logic, synchronized adjustment of each electronic expansion valve is achieved.

[0129] Step S505, obtain T ds and T d Difference △Td=|T ds -T d |.

[0130] Step S506, at ΔT d When T1 is less than 1, the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger is obtained. 1≤T1≤3 Here, the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger is calculated as follows:

[0131] ΔT ni =T ini -T oni ; where ΔT niis the temperature difference between the inlet and outlet temperatures of the i-th indoor heat exchanger, T ini is the inlet temperature of the i-th indoor heat exchanger, T oni is the outlet temperature of the i-th heat exchanger.

[0132] Step S507: Calculate the second calculation factor T2.

[0133] Here, the second calculation factor T2 is obtained as follows:

[0134] calculate Get T2; where T2 is the second calculation factor, ΔT ni is the temperature difference between the inlet and outlet temperatures of the i-th indoor heat exchanger, and n is the number of indoor heat exchangers.

[0135] Step S508: When T2≤T3, maintain the current opening of each electronic expansion valve. 0≤T3≤2.

[0136] Step S509 , when T2>T3, according to the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger, determine a target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger.

[0137] Here, each electronic expansion valve is adjusted with T2 as the target. The target number of steps is obtained as follows:

[0138] Calculate S si =INT(d×(ΔT ni -T2)), get the target number of steps;

[0139] Among them, S si is the target number of steps of the i-th electronic expansion valve corresponding to the i-th indoor heat exchanger; d is the third influencing factor, ΔT ni is the temperature difference between the inlet and outlet temperatures of the i-th indoor heat exchanger, and T2 is the second calculation factor.

[0140] Step S510 , controlling each electronic expansion valve to use the second time period t2 as a cycle, and adjusting the target number of steps in each cycle.

[0141] Step S511, determine ΔT d Is it greater than or equal to T4? d ≥T4, return to step S504, and perform target exhaust PID control on each expansion valve based on the current opening according to the target exhaust temperature; d When T1 < T4, the process returns to step S506 and continues to fine-tune each electronic expansion valve according to the conditions of each indoor heat exchanger. The value range of T4 is [2, 5], and T1 < T4.

[0142] Figure 6This is a schematic diagram of a test device for a one-to-many air conditioner provided in an embodiment of the present application. Figure 1 The system shown can be implemented in software, hardware or a combination of both.

[0143] Combine Figure 6 As shown, an embodiment of the present disclosure provides a testing device 600 for a one-to-many air conditioner, comprising a first execution module 61 , an acquisition module 62 and a second execution module 63 .

[0144] The first execution module 61 is configured to obtain an initial opening degree and control each electronic expansion valve to operate according to the initial opening degree;

[0145] An obtaining module 62 is configured to obtain a target exhaust gas temperature and a current exhaust gas temperature;

[0146] The second execution module 63 is configured to determine an opening adjustment strategy for each electronic expansion valve according to a difference between the target exhaust temperature and the current exhaust temperature.

[0147] Figure 7 This is a schematic diagram of a test device for a one-to-many air conditioner provided in an embodiment of the present application. Figure 7 As shown, the testing device 700 for a one-to-many air conditioner includes:

[0148] Processor 71 and memory 72. Optionally, the device may also include a communication interface 73 and a bus 74. Processor 71, communication interface 73, and memory 72 may communicate with each other via bus 74. Communication interface 73 may be used for information transmission. Processor 71 may invoke logic instructions in memory 72 to execute the test method for a one-to-many air conditioner system described in the above embodiment.

[0149] In addition, the logic instructions in the memory 72 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0150] Memory 72, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 71 executes the program instructions / modules stored in memory 72 to perform functional applications and data processing, thereby implementing the test method for a single-drive, multi-air conditioner in the above-described embodiments.

[0151] The memory 72 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 72 may include high-speed random access memory and non-volatile memory.

[0152] Combine Figure 8 As shown, an embodiment of the present disclosure provides a one-to-many air conditioner 100, comprising: a product body, comprising a plurality of indoor heat exchangers, each indoor heat exchanger having a corresponding electronic expansion valve; and the above-mentioned test device 600 (700) for the one-to-many air conditioner. The test device 600 (700) for the one-to-many air conditioner is installed on the product body. The installation relationship described here is not limited to placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connections, electrical connections or signal transmission connections, etc. It can be understood by those skilled in the art that the test device 600 (700) for the one-to-many air conditioner can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0153] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned testing method for a one-to-many air conditioner.

[0154] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0155] The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code, or a transient storage medium.

[0156] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0157] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0158] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0159] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A test method for a one-to-many air conditioner, characterized in that: The one-to-many air conditioner includes multiple indoor heat exchangers, each of which has a corresponding electronic expansion valve; The test method includes: obtaining an initial opening degree, and controlling each electronic expansion valve to operate according to the initial opening degree; Obtain target exhaust temperature and current exhaust temperature; When the difference between the target exhaust temperature and the current exhaust temperature is less than a first threshold, 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 between the target exhaust temperature and the current exhaust temperature is greater than a second threshold, each electronic expansion valve is adjusted simultaneously according to the target exhaust temperature; the first threshold is less than the second threshold; The step of 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: Obtain the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger; Determine a target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger; The opening of the electronic expansion valve corresponding to each indoor heat exchanger is adjusted according to the target number of steps.

2. The testing method according to claim 1, wherein: The obtaining of the initial opening comprises: Get the outdoor ambient temperature; According to the current outdoor ambient temperature, an initial opening degree positively correlated with the current outdoor ambient temperature is determined.

3. The testing method according to claim 2, wherein: The determining of the initial opening degree that is positively correlated with the current outdoor ambient temperature includes: Calculate S0 = INT(A + B × (T ao -T b )), obtaining the initial opening; Among them, S0 is the initial opening, A is the first influencing factor, B is the second influencing factor, T ao is the outdoor ambient temperature, T b is the first calculation factor related to the outdoor ambient temperature; A>0, B>0.

4. The testing method according to claim 1, wherein: The step of determining the target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger includes: Calculate S si =INT(d×(ΔT ni -T2)), obtain the target number of steps; Among them, S si is the target number of steps of the i-th electronic expansion valve corresponding to the i-th indoor heat exchanger; d is the third influencing factor, ΔT ni is the temperature difference between the inlet temperature and the outlet temperature of the i-th indoor heat exchanger, and T2 is a second calculation factor related to the sum of the temperature differences between the inlet temperature and the outlet temperature of each indoor heat exchanger.

5. The testing method according to claim 4, characterized in that: The second calculation factor T2 is obtained by: calculate Get T2; Where T2 is the second calculation factor, ΔT ni is the temperature difference between the inlet and outlet temperatures of the i-th indoor heat exchanger, and n is the number of indoor heat exchangers.

6. A test device for a one-to-many air conditioner, characterized in that: The one-to-many air conditioner includes multiple indoor heat exchangers, each of which has a corresponding electronic expansion valve; The testing device comprises: a first execution module 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; a second execution module configured to adjust 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 between the target exhaust temperature and the current exhaust temperature is less than a first threshold; When the difference between the target exhaust temperature and the current exhaust temperature is greater than a second threshold, each electronic expansion valve is adjusted simultaneously according to the target exhaust temperature; the first threshold is less than the second threshold; The step of 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: Obtain the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger; Determine a target number of steps that is positively correlated with the temperature difference between the inlet temperature and the outlet temperature of each indoor heat exchanger; The opening of the electronic expansion valve corresponding to each indoor heat exchanger is adjusted according to the target number of steps.

7. A test device for a one-to-many air conditioner, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the testing method for a one-to-many air conditioner according to any one of claims 1 to 5 when running the program instructions.

8. A one-to-many air conditioner, characterized in that: include: The product body includes multiple indoor heat exchangers, each of which has a corresponding electronic expansion valve; The testing device for a one-to-many air conditioner as described in claim 6 or 7 is installed on the product body.

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