Stability control method based on prototype performance test

Abstract

The application relates to a stability control method based on prototype performance testing, which comprises the following steps: setting a standard working condition operation target parameter in a test mode, and establishing a test state parameter model library; under the test working condition stable state, after the prototype enters the test mode, the environmental working condition adjustment characteristics in the test state are utilized to identify the prototype operation parameter in real time and compare the prototype operation parameter with the target parameter; if the parameters match, the prototype continues to operate stably; if the parameters do not match, the prototype operation state is adjusted until the prototype is re-stabilized at the target parameter, the prototype operates according to the operation parameter in the state, and the prototype performance output is stabilized; the method utilizes the environmental working condition adjustment characteristics in the test state to identify the prototype operation parameter stability and compare the prototype operation parameter with the target parameter, identifies whether the ability requirement is met in real time, ensures the air conditioner performance output to be stable, and guarantees that the ability and energy efficiency test are qualified under various environmental working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioner testing, in particular to a stability control method based on prototype performance testing. BACKGROUND

[0002] The capacity test of household air conditioner has a specific test mode, which aims to ensure that the prototype meets the national standard and the capacity and energy efficiency of a set of operation methods under specific sampling.

[0003] Currently, the control of the test mode mainly has two kinds: one is to confirm the best capacity point by fixing the frequency, fan speed, throttle opening, guide vane angle, etc., and directly starting the test mode; the other is to start at high frequency and then slowly reduce the frequency to the corresponding target frequency, and the throttle opening is adjusted according to the target exhaust temperature of the air conditioner under the test mode, and the fan speed and guide vane angle are fixed after starting.

[0004] The patent direction of air conditioner test mode in the prior art is to find the best point and reduce consumption, such as patent No. CN201611251594.9, which discloses an air conditioner performance testing method and device. When the performance test instruction is detected, the operating frequency of the compressor is controlled, and it is judged whether the compressor frequency is in the preset minimum frequency range, and the guide vane is controlled to rotate to the minimum air outlet angle under the minimum frequency range to confirm the lowest performance. If the compressor is not in the minimum frequency range, the compressor frequency is fixed and the guide vane is controlled to rotate to the maximum air outlet angle position to determine the highest performance of the air conditioner. The prior art does not involve identifying the capacity output stability under the test state, and the capacity output stability cannot be ensured by controlling and adjusting the environmental state change under the test mode. SUMMARY

[0005] The purpose of the present application is to solve the above problems, and provide a stability control method based on prototype performance testing.

[0006] One technical solution adopted by the present application to solve the technical problem is to provide a stability control method based on prototype performance testing:

[0007] Set the standard operating target parameters under the test mode, and establish a test state parameter model library;

[0008] Under the stable state of the test condition, after the prototype enters the test mode, the environmental condition adjustment characteristics under the test state are used to identify the prototype operating parameters in real time and compare them with the target parameters;

[0009] If the parameters match, continue stable operation;

[0010] If the parameters do not match, adjust the prototype running state until it is stabilized at the target parameters, and the prototype runs according to the running parameters in this state to ensure the stability of the prototype performance output;

[0011] The specific steps are as follows:

[0012] S1: After the working condition of the environment to be detected is stable, the prototype is set to test mode and is started to run;

[0013] S2: After the prototype runs, the test state parameter model library is obtained, and the prototype test mode set and the change of the environment working condition during the running process are identified;

[0014] S3: The time taken from starting the prototype to running until the working condition is stable is recorded as time t;

[0015] S4: After the working condition and the prototype running reach dynamic balance, the prototype running parameters are compared with the target parameters of the corresponding mode in the test state parameter model library in real time;

[0016] S4.1: If the parameters match, the prototype continues to run;

[0017] S4.2: If the parameters do not match, the difference between the parameters and the target value is judged, and the prototype running state is adjusted accordingly until it is stabilized at the target parameters, and the prototype runs according to the running parameters in this state.

[0018] Further, in step S3, the temperature sensing components provided by the prototype system detect the inside and outside environment temperatures respectively, and the time taken from starting the test to the stabilization of the inside and outside environments is time t.

[0019] Further, the temperature sensing components include a compressor discharge temperature detection component for detecting the discharge temperature, a condenser copper pipe surface temperature detection component for detecting the condenser temperature, an evaporator copper pipe surface temperature detection component for detecting the evaporator temperature, an outside environment temperature detection component for detecting the outside ring temperature, and an inside environment temperature detection component for detecting the inside ring temperature.

[0020] Further, in step S4.2, the difference judgment includes:

[0021] System parameter difference judgment: the difference range is 2-3℃ for temperature value comparison, and the difference range is 0.5-1A for whole machine current value comparison;

[0022] If the corresponding parameter value collected by the controller of the prototype running in the test mode is greater than the above comparison value, it is judged that the system parameter difference is large;

[0023] Compressor power value difference judgment: the difference range is 100-400W for compressor power value comparison, and it is judged that the compression power is similar if the power deviation is within 10-50W.

[0024] The prototype is running in test mode, and if the corresponding parameter value collected by the controller is greater than the above comparison value, it is determined that the compressor power difference is large;

[0025] When the system parameters and the compressor power are both large, the prototype is abnormal.

[0026] Further, in step S4.2, the specific adjustment steps are as follows:

[0027] S4.21 If the parameters and the power are both large, it is determined that the prototype is abnormal, and the tester is informed;

[0028] S4.22 If the parameter difference is not large, enter the adjustment mode selection link; the adjustment mode includes large environment mode, moderate environment mode, and small environment mode;

[0029] S4.23 According to the time t calculated in step S3, compare t with t1 and t2 in the test state parameter model library, obtain the mode of the prototype, and adjust the prototype parameters according to the mode;

[0030] Wherein t1 < t2; t1 is the time used for the prototype to reach dynamic stability with the environment condition after the environment condition fluctuates again after starting the test mode under stable working condition in a large environment condition laboratory; t2 is the time used for the prototype to reach dynamic stability with the environment condition after the environment condition fluctuates again after starting the test mode under stable working condition in a small environment condition laboratory;

[0031] S4.24 After entering the adjustment mode, wait for the working condition and the prototype to reach dynamic balance again, and stabilize for T time; T is the continuous time of dynamic stability of the prototype and the environment condition;

[0032] S4.25 Re-compare the prototype operating parameters with the corresponding mode parameters in the test state parameter model library;

[0033] If the parameters match, return to step S4.1;

[0034] If the parameters do not match, return to step S4.2.

[0035] Further, in step S4.23, the specific processing steps are as follows:

[0036] S4.231 When t1 < t < t2, the prototype is adjusted to select the moderate environment mode;

[0037] In the moderate environment mode, if the system parameter difference is large and the compression power is similar, the electronic expansion valve is closed to the minimum, and then adjusted according to the target value;

[0038] If the system parameter difference is small, the compressor power is sufficient or over-power, first adjust the compressor to make the compressor power close to the target power, and then adjust the electronic expansion valve to adjust the system parameters to the target value;

[0039] S4.232 If t1 < t < t2 is false, it is judged that t < t1. If it is true, the prototype adjusts the large environment mode;

[0040] In the large environment mode, if the system parameter difference is large and the compression power is similar, first increase the frequency of the compressor and then slowly decrease the frequency to the target power, and then fine-tune the electronic expansion valve;

[0041] If the system parameter difference is small, the compressor power is sufficient or over-power, fine-tune the running frequency to make the compressor power close to the target power. If the system parameter still does not reach the corresponding target value, adjust the electronic expansion valve. S4.233 If it is judged that t < t1 is false, the prototype adjusts the small environment mode;

[0042] In the small environment mode, if the system parameter difference is large and the compression power is similar, first adjust the fan speed to improve the system pressure, and then restore the original fan speed after stabilization, and then adjust the electronic expansion valve to adjust the system parameters to the target value;

[0043] If the system parameter difference is small, the compressor power is sufficient or over-power, first adjust the compressor to make the compressor power close to the target power, and then adjust the electronic expansion valve to adjust the system parameters to the target value.

[0044] Further, in the large environment mode:

[0045] If the system parameter difference is large and the compression power is similar, fine-tune the electronic expansion valve according to the exhaust temperature deviation. The electronic expansion valve is adjusted by 2-5 steps per minute. When the exhaust temperature is lower than the target value, the electronic expansion valve is small. When it is higher than the target value, it is the opposite;

[0046] If the system parameter difference is small, the compressor power is sufficient or over-power, and if the system parameter still does not reach the corresponding target value, the electronic expansion valve is adjusted by 2-5 steps per minute. When the exhaust temperature is lower than the target value, the electronic expansion valve is small. When it is higher than the target value, it is the opposite;

[0047] In the moderate environment mode:

[0048] If the system parameter difference is small, the compressor power is sufficient or over-power, the electronic expansion valve is adjusted by 2-5 steps per minute. When the exhaust temperature is lower than the target value, the electronic expansion valve is small. When it is higher than the target value, it is the opposite;

[0049] In the small environment mode:

[0050] If the system parameter difference is large and the compression power is similar, when the fan speed is adjusted, if in the refrigeration state, the outer fan speed is reduced to increase the system pressure; if in the heating mode, the inner fan speed is reduced to increase the system pressure;

[0051] When the temperature parameter detected by the temperature sensing component of the prototype system is stable for a time T, the original fan speed is restored;

[0052] If the system parameter difference is small and the compressor power is sufficient or super-power, the electronic expansion valve is adjusted by 2-5 steps per minute, when the exhaust temperature is lower than the target value, the electronic expansion valve is opened small, and when the target value is higher, the electronic expansion valve is opened large.

[0053] Further, in the adjustment mode, if the prototype system does not have an electronic expansion valve, the compressor is first adjusted to make the compressor power similar to the target power, and then the speed of the fan is controlled to fine-tune the system parameter;

[0054] The fine-tuning mode is:

[0055] The temperature sensing component of the prototype system detects the temperature in real time;

[0056] When the prototype is in the refrigeration test mode, the inner fan speed is adjusted to the maximum, when the exhaust temperature or the condenser temperature is lower than the target value, the outer fan speed is reduced to increase the temperature;

[0057] If the exhaust temperature or the condenser temperature is higher than the target value, the outer fan speed is increased to reduce the temperature;

[0058] When the prototype is in the heating test mode, the inner fan speed is adjusted to the maximum, when the exhaust temperature or the evaporator temperature is lower than the target value, the outer fan speed is increased to increase the condenser temperature, so as to increase the temperature;

[0059] If the exhaust temperature or the evaporator temperature is higher than the target value, the outer fan speed is reduced to reduce the condenser temperature, so as to increase the temperature.

[0060] Compared with the prior art, the present application has the following beneficial effects: the prototype running parameter stability is identified and compared with the target parameter by using the environmental working condition adjustment characteristics in the test state, and whether the capacity requirement is met is identified in real time; if the parameters match, the prototype continues to run stably; if it is found that the parameters do not match the target parameters, the prototype running state is automatically adjusted until it is stabilized at the target parameters, and the prototype runs according to the running parameters in the improved state, so as to ensure that the air conditioner performance output is stable, and the capacity and energy efficiency test is qualified under various environmental working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0061] The present application will be further described below in combination with the drawings.

[0062] Figure 1 It is a process flowchart of the present method.

[0063] Figure 2 is a process step diagram for the method.

[0064] Figure 3 is a process step diagram for the prototype running state adjustment.

[0065] Figure 4 is a process step diagram for the prototype running state adjustment without electronic expansion valve. DETAILED DESCRIPTION

[0066] The preferred embodiments of the present application will be described in more detail hereinafter with reference to the accompanying drawings, in which the preferred embodiments of the present application are shown. It is to be noted, however, that the scope of the present application is not limited by the preferred embodiments set forth hereinbelow, but include all changes, equivalents, and substitutes within the spirit and scope of the present application. It is to be understood that the individual embodiments are presented for the purpose of explanation so as to convey the subtleties of the present application to those skilled in the art.

[0067] Example 1

[0068] As shown in FIG. 1, Example 1 provides a stability control method based on prototype performance testing: Figure 1

[0069] 101 Set the standard operating target parameters in the test mode, and establish a test state parameter model library, which is used as a comparison target for product capacity and energy efficiency values.

[0070] The test state parameter model library is based on the system parameters of the prototype in a stable state when the prototype is running in the test mode under the corresponding operating conditions of different national standards. The parameters are the nominal capacity and energy efficiency values that the prototype can achieve in a normal state. However, due to differences in components produced by the prototype, the product capacity may deviate when the prototype is running, and the system operating parameters will deviate when the deviation occurs. Therefore, by establishing the test state parameter model library as a comparison target for product capacity and energy efficiency values, it is not necessary to wait for the test results to be completed before processing.

[0071] 102 When the prototype is in a stable state under the test operating conditions, enter the test mode, and use the test state environmental condition adjustment characteristics to identify the stability of the prototype operating parameters in real time and compare them with the target parameters.

[0072] 103 If the parameters match, continue to run stably.

[0073] 104 If the parameters do not match, adjust the prototype running state until it is re-stabilized at the target parameters, and the prototype runs according to the operating parameters in this state to ensure the stability of the prototype performance output.

[0074] As shown in FIG. 2, Example 2 provides a stability control method based on prototype performance testing: Figure 2 ​The specific steps are as follows:

[0075] S1: After the working condition of the detection environment is stable, the prototype sets the test mode and starts running;

[0076] Specifically, the stable working condition of the detection environment means that the capacity and energy efficiency test qualified working condition is stable under each environmental working condition;

[0077] S2: After the prototype runs, the test state parameter model library is obtained, and the prototype set test mode and the change of the environmental working condition during the running process are identified;

[0078] S3: The time taken from the fluctuation of the running working condition of the prototype to the stable running working condition is recorded as time t;

[0079] S4: After the working condition and the prototype running reach dynamic balance, the prototype running parameters are compared with the target parameters of the corresponding mode in the test state parameter model library in real time;

[0080] S4.1: If the parameters match, the prototype continues to run, and the prototype stops running after the running time meets the standard requirement time, and a report is manually issued;

[0081] S4.2: If the parameters do not match, the difference between the parameters and the target value is judged, and the prototype running state is adjusted accordingly until it is stabilized at the target parameter, and the prototype runs according to the running parameters under the state.

[0082] In this embodiment, in step S3, the temperature sensing components provided by the prototype system detect the inside and outside environment temperatures respectively, start timing after starting the test, and the time taken until the inside and outside environments are stable is the time t.

[0083] In this embodiment, the temperature sensing components include a compressor exhaust temperature detection component for detecting the exhaust temperature, a condenser copper pipe surface temperature detection component for detecting the condenser temperature, an evaporator copper pipe surface temperature detection component for detecting the evaporator temperature, an outside environment temperature detection component for detecting the outside ring temperature, and an inside environment temperature detection component for detecting the inside ring temperature.

[0084] In this embodiment, in step S4.2, the difference judgment includes:

[0085] System parameter difference judgment: the difference range is 2-3℃ for temperature value comparison, and the difference range is 0.5-1A for whole machine current value comparison;

[0086] If the corresponding parameter value collected by the controller of the prototype running in the test mode is greater than the above comparison value, it is judged that the system parameter difference is large;

[0087] Judgment of compressor power value difference: the difference range of compressor power value comparison judgment is 100-400W, and the power deviation is within 10-50W, which is judged as similar compressor power;

[0088] When the prototype runs in the test mode, if the corresponding parameter value collected by the controller is greater than the above comparison value, it is judged that the compressor power difference is large;

[0089] When the system parameters and the compressor power are both large, the prototype is abnormal;

[0090] In actual application, the prototype abnormality is displayed by the fault code flashing of the prototype indoor lamp panel, informing the test personnel.

[0091] The method uses the environmental condition adjustment characteristics in the test state to identify the stability of the prototype operating parameters and compare with the target parameters, and identifies in real time whether the capacity requirement is met; if the parameters match, continue to operate stably; if it is found that the target parameters do not match, the prototype operating state is automatically adjusted until it is stabilized at the target parameters, and the prototype operates according to the operating parameters in the modified state, ensuring that the air conditioner performance output is stable, and ensuring that the capacity and energy efficiency test is qualified under various environmental conditions.

[0092] The method establishes a prototype test state parameter model library, so that the prototype test process can identify whether the capacity requirement is met in real time without waiting for the test results before making control processing; the environmental temperature change after the prototype test is detected, and the test laboratory environmental space state is identified.

[0093] The method has the following advantages:

[0094] 1. The method solves the problem of no systematic target control value in the unstable state of the system by establishing a performance test mode stable parameter data model.

[0095] 2. The method can avoid the situation that the prototype capacity is insufficient due to production differences (such as low compressor discharge volume, low motor speed, and low number of heat exchanger fins, etc.).

[0096] 3. The method can reduce the capacity test process debugging.

[0097] Example 2:

[0098] Example 2 establishes a test state parameter model library for a certain national standard 3HP variable frequency air conditioner.

[0099] The test state parameter model library (according to different national standards to set corresponding test modes) sets the test mode comparison parameters including discharge temperature, evaporator temperature, condenser temperature, compressor power, and whole machine current.

[0100] Take a nominal 3-pot cabinet 7725 national standard air conditioning product refrigeration test mode as an example, the parameters are for reference only:

[0101] Mode 1 - nominal refrigeration capacity P1: exhaust temperature 78℃, evaporator temperature 9℃, condenser temperature 43℃, compressor power 2080W, whole machine current 10A.

[0102] Mode 2 - low temperature nominal refrigeration capacity P1: exhaust temperature 71℃, evaporator temperature 9℃, condenser temperature 31℃, compressor power 1900W, whole machine current 9.5A.

[0103] Mode 3 - intermediate refrigeration capacity P3: exhaust temperature 62℃, evaporator temperature 17℃, condenser temperature 36℃, compressor power 640W, whole machine current 4.5A.

[0104] Mode 4 - low temperature intermediate refrigeration capacity P3: exhaust temperature 41℃, evaporator temperature 15℃, condenser temperature 30℃, compressor power 480W, whole machine current 3.7A.

[0105] Example 3:

[0106] Example 3 provides a method for adjusting the process of step S4.2 of Example 1, which is controlled by the prototype controller.

[0107] As shown in Figure 3 , the specific adjustment steps are as follows:

[0108] S4.21 If the parameters and power deviate greatly at the same time, it is judged that the prototype is abnormal, and the test personnel are informed;

[0109] S4.22 If the parameter difference is not large, enter the adjustment mode selection link;

[0110] In actual air conditioning capacity testing, since the size of the laboratory space is unknown, when the test prototype is turned on, the environmental temperature fluctuates due to changes in laboratory load, and after the fluctuation, the laboratory temperature is adjusted to find a new balance. Through empirical data analysis, the prototype is tested under large environmental conditions in the laboratory, which causes the environmental condition fluctuation amplitude to be small, the wavelength to be short, and the stable adjustment to be fast. In the moderate environmental condition laboratory, the environmental condition fluctuation amplitude is relatively large, the wavelength is relatively long, and the stable adjustment is fast. In the small environmental condition laboratory, the environmental condition fluctuation amplitude is large, the change is fast, the wavelength is the longest, and the stable adjustment is slow and smooth.

[0111] Based on this, three kinds of working condition environment modes are set for adjustment mode, namely large environment mode, moderate environment mode, and small environment mode.

[0112] S4.23 Calculate the time t according to step S3, and compare the value of t with t1 and t2 of the test state parameter model library to obtain the mode of the prototype, and adjust the parameters of the prototype according to the mode;

[0113] Wherein t1 < t2; t1 is the time used for the prototype to reach dynamic stability with the environment condition when the prototype is tested in a large environment condition laboratory, and the environment condition is set to be stable and the test mode is started; t2 is the time used for the prototype to reach dynamic stability with the environment condition when the prototype is tested in a small environment condition laboratory, and the environment condition is set to be stable and the test mode is started;

[0114] S4.24 After the mode is adjusted, the working condition and the operation of the prototype reach dynamic balance again, and stabilize for T time; T is the continuous time of dynamic stability of the prototype and the environment condition;

[0115] S4.25 Re-compare the operation parameters of the prototype with the corresponding mode parameters in the test state parameter model library;

[0116] If the parameters match, return to step S4.1;

[0117] If the parameters do not match, return to step S4.2.

[0118] In this embodiment, in step S4.23, the specific processing steps are as follows:

[0119] S4.231 When t1 < t < t2, the prototype is adjusted to select a moderate environment mode;

[0120] In the moderate environment mode, if the system parameter difference is large and the compression power is similar, the electronic expansion valve is closed to the minimum, and then adjusted according to the target value;

[0121] If the system parameter difference is small and the compressor power is sufficient or super-power, first adjust the compressor to make the compressor power similar to the target power, and then adjust the electronic expansion valve to adjust the system parameters to the target value;

[0122] S4.232 If t1 < t < t2 is not, it is judged that t < t1, if yes, the prototype is adjusted to select a large environment mode;

[0123] In the large environment mode, if the system parameter difference is large and the compression power is similar, the compressor is first raised in frequency and then slowly reduced in frequency to the target power, and then the electronic expansion valve is finely adjusted;

[0124] If the system parameter difference is small and the compressor power is sufficient or super-power, finely adjust the operating frequency to make the compressor power similar to the target power, and if the system parameters still do not reach the corresponding target value, adjust the electronic expansion valve; S4.233 If it is judged that t < t1 is not, the prototype is adjusted to select a small environment mode;

[0125] In the small environment mode, if the system parameters differ greatly and the compression powers are similar, the fan speed is first adjusted to increase the system pressure, and then the original fan speed is restored after stabilization, and then the electronic expansion valve is adjusted to adjust the system parameters to the target value.

[0126] If the system parameters differ slightly and the compressor power is sufficient or super-power, the compressor is first adjusted to make the compressor power similar to the target power, and then the electronic expansion valve is adjusted to adjust the system parameters to the target value.

[0127] In the present embodiment, in the large environment mode:

[0128] If the system parameters differ greatly and the compression powers are similar, the electronic expansion valve is fine-tuned according to the exhaust temperature deviation, the electronic expansion valve is adjusted by 2-5 steps per minute, the electronic expansion valve is opened small when the exhaust temperature is lower than the target value, and vice versa when the exhaust temperature is higher than the target value.

[0129] If the system parameters differ slightly and the compressor power is sufficient or super-power, if the system parameters still do not reach the corresponding target value, the electronic expansion valve is adjusted by 2-5 steps per minute, the electronic expansion valve is opened small when the exhaust temperature is lower than the target value, and vice versa when the exhaust temperature is higher than the target value.

[0130] In the moderate environment mode:

[0131] If the system parameters differ slightly and the compressor power is sufficient or super-power, the electronic expansion valve is adjusted by 2-5 steps per minute, the electronic expansion valve is opened small when the exhaust temperature is lower than the target value, and vice versa when the exhaust temperature is higher than the target value.

[0132] In the small environment mode:

[0133] If the system parameters differ greatly and the compression powers are similar, when adjusting the fan speed, if in the cooling state, the outer fan speed is reduced to increase the system pressure; if in the heating mode, the inner fan speed is reduced to increase the system pressure.

[0134] When the temperature parameter detected by the temperature sensing assembly of the prototype system is stable for T time, the original fan speed is restored.

[0135] If the system parameters differ slightly and the compressor power is sufficient or super-power, the electronic expansion valve is adjusted by 2-5 steps per minute, the electronic expansion valve is opened small when the exhaust temperature is lower than the target value, and vice versa when the exhaust temperature is higher than the target value.

[0136] In the present embodiment, the corresponding automatic adjustment mode is established, when the capacity fluctuates, the corresponding control mode is selected to realize rapid automatic adjustment, without manual control and adjustment, and without affecting the environmental conditions.

[0137] In the present embodiment, the corresponding automatic adjustment mode is established, when the capacity fluctuates, the corresponding control mode is selected to realize rapid automatic adjustment, without manual control and adjustment, and without affecting the environmental conditions.

[0138] Embodiment 4 provides a suitable adjustment method based on Embodiment 3 for the case that the system does not have electronic expansion valve.

[0139] In this embodiment, in the adjustment mode, if the system does not have electronic expansion valve, the compressor is first adjusted to make the compressor power close to the target power, and then the speed of the fan is controlled to fine tune the system parameters.

[0140] As shown in FIG. 4, the fine tuning method is as follows: Figure 4

[0141] The temperature sensing component of the system detects the temperature in real time.

[0142] When the system is running in the cooling test mode, the inner fan speed is adjusted to the maximum, and when the discharge temperature or the condenser temperature is lower than the target value, the outer fan speed is reduced to increase the temperature.

[0143] If the discharge temperature or the condenser temperature is higher than the target value, the outer fan speed is increased to reduce the temperature.

[0144] When the system is running in the heating test mode, the inner fan speed is adjusted to the maximum, and when the discharge temperature or the evaporator temperature is lower than the target value, the outer fan speed is increased to increase the condenser temperature, thereby increasing the temperature.

[0145] If the discharge temperature or the evaporator temperature is higher than the target value, the outer fan speed is reduced to reduce the condenser temperature, thereby increasing the temperature.

[0146] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the embodiments are not intended to limit the scope of the present application, unless otherwise specifically stated. In all of the examples shown and discussed herein, any particular numerical value should be interpreted as merely an example, and not as a limitation. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters designate like items throughout the examples, and therefore, further discussion of the same will not be repeated.

[0147] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" and the like indicate the orientation or positional relationship based on the shown orientation or positional relationship, and are only for the convenience of describing the present application and simplifying the description, and in the absence of contrary description, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0148] ​For ease of description, spatial relative terms, such as "above", "upper", "top", "bottom", and "under" can be used herein to describe a spatial position relationship of features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described.

[0149] In addition, it should be noted that the use of "first", "second", and the like words to define parts only facilitates the distinction of the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0150] If the present application discloses or involves parts or structural members fixedly connected to each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, connected by bolts or screws), or as: non-detachable fixed connection (for example, riveting, welding), of course, the fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming process) (obviously, integral forming process cannot be used).

[0151] The above preferred embodiments further illustrate the purpose, technical solutions and advantages of the present application. It should be understood that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A stability control method based on prototype performance testing, characterized by: setting standard operating target parameters in a test mode, and establishing a test state parameter model library; after the prototype enters the test mode in a stable test operating state, real-time identification of the prototype operating parameters is performed using the test state environmental operating condition adjustment characteristics, and the parameters are compared with the target parameters; if the parameters match, the prototype continues to operate stably; if the parameters do not match, the prototype operating state is adjusted until the target parameters are re-stabilized, and the prototype operates according to the operating parameters in the state, ensuring stable performance output of the prototype; the specific steps are as follows: S1: after the environment to be detected is stable, the prototype is set to a test mode and is started to operate; S2: after the prototype operates, the test state parameter model library is obtained, and the prototype setting test mode and the environmental operating condition change during operation are identified; S3: the time taken from starting the prototype to operating stably is recorded as time t; S4: after the operating conditions and the prototype operation reach dynamic balance, the prototype operating parameters are compared in real time with the target parameters of the corresponding mode in the test state parameter model library; S4.1: if the parameters match, the prototype continues to operate; S4.2: if the parameters do not match, the parameter difference is determined, and the prototype operating state is adjusted accordingly until the target parameters are re-stabilized, and the prototype operates according to the operating parameters in the state; in step S4.2, the specific adjustment steps are as follows: S4.21: if the parameters and power deviate greatly at the same time, it is determined that the prototype is abnormal; S4.22: if the parameter difference is not great, the adjustment mode selection link is entered; the adjustment mode includes a large environment mode, a moderate environment mode, and a small environment mode; S4.23: according to the time t calculated in step S3, t is compared with t1 and t2 in the test state parameter model library, the mode in which the prototype is located is determined, and the prototype parameters are adjusted according to the mode; wherein t1 < t2; t1 is the time taken for the prototype to reach dynamic stability with the environmental operating conditions after starting to operate in a test mode in a large environmental operating condition laboratory; t2 is the time taken for the prototype to reach dynamic stability with the environmental operating conditions after starting to operate in a test mode in a small environmental operating condition laboratory; S4.24: after the adjustment mode is entered, the operating conditions and the prototype operation reach dynamic balance again, and work for a time T; S4.25: the prototype operating parameters are compared again with the parameters of the corresponding mode in the test state parameter model library; if the parameters match, step S4.1 is returned to; if the parameters do not match, step S4.2 is returned to.

2. The stability control method based on prototype performance testing of claim 1, wherein: In step S3, the temperature sensing components provided by the prototype system detect the inside and outside environmental temperatures, start timing after starting the test, and the time taken until the inside and outside environments stabilize is the time t.

3. The stability control method based on prototype performance testing of claim 2, wherein: The temperature sensing components include a compressor discharge temperature detection component for detecting the discharge temperature, a condenser copper pipe surface temperature detection component for detecting the condenser temperature, an evaporator copper pipe surface temperature detection component for detecting the evaporator temperature, an outside environmental temperature detection component for detecting the outside ring temperature, and an inside environmental temperature detection component for detecting the inside ring temperature.

4. The stability control method based on prototype performance testing of claim 3, wherein: In step S4.2, the difference judgment includes: System parameter difference judgment: temperature value comparison difference range is 2-3℃, the whole machine current value comparison difference range is 0.5-1A; The prototype runs in test mode, and the controller collects corresponding parameter values greater than the above comparison values, then the system parameter difference is judged to be large; Compressor power value difference judgment: compressor power value comparison difference range is 100-400W, power deviation within 10-50W is judged as similar compression power; The prototype runs in test mode, and the controller collects corresponding parameter values greater than the above comparison values, then the compressor power difference is judged to be large; When the system parameter and the compressor power are both large, the prototype is reported to be abnormal. 5.The stability control method based on prototype performance test of claim 1, wherein: In step S4.23, the specific processing steps are: S4.231 When t1 In moderate environment mode, if the system parameter difference is large and the compression power is similar, the electronic expansion valve is closed to the minimum, and then adjusted according to the target value; If the system parameter difference is small and the compressor power is sufficient or over-power, first adjust the compressor to make the compressor power similar to the target power, and then adjust the electronic expansion valve to adjust the system parameter to the target value; S4.232 If t1 In large environment mode, if the system parameter difference is large and the compression power is similar, the compressor first increases the frequency and then slowly reduces the frequency to the target power, and then adjusts the electronic expansion valve; If the system parameter difference is small and the compressor power is sufficient or over-power, adjust the running frequency to make the compressor power similar to the target power, and if the system parameter still does not reach the corresponding target value, adjust the electronic expansion valve; S4.233 If t1 In small environment mode, if the system parameter difference is large and the compression power is similar, first adjust the fan speed to improve the system pressure, then restore the original fan speed, and then adjust the electronic expansion valve to adjust the system parameter to the target value; If the system parameter difference is small and the compressor power is sufficient or over-power, first adjust the compressor to make the compressor power similar to the target power, and then adjust the electronic expansion valve to adjust the system parameter to the target value.

6. The stability control method based on prototype performance test according to claim 5, characterized in that: In large environment mode: If the system parameter difference is large and the compression power is similar, adjust the electronic expansion valve according to the exhaust temperature deviation, the electronic expansion valve is adjusted 2-5 steps per minute, the electronic expansion valve is opened small when the exhaust temperature is lower than the target value, and vice versa when the exhaust temperature is higher than the target value; If the system parameter difference is small and the compressor power is sufficient or over-power, if the system parameter still does not reach the corresponding target value, the electronic expansion valve is adjusted 2-5 steps per minute, the electronic expansion valve is opened small when the exhaust temperature is lower than the target value, and vice versa when the exhaust temperature is higher than the target value; In moderate environment mode: If the system parameter difference is small and the compressor power is sufficient or over-power, the electronic expansion valve is adjusted 2-5 steps per minute, the electronic expansion valve is opened small when the exhaust temperature is lower than the target value, and vice versa when the exhaust temperature is higher than the target value; In the small environment mode: If the system parameters are different and the compression power is similar, when adjusting the fan speed, if in the cooling state, reducing the outer fan speed will increase the system pressure; if in the heating mode, reducing the inner fan speed will increase the system pressure; When the temperature parameter detected by the temperature sensing component of the prototype system is stable for a certain time T, the original fan speed is restored; If the system parameters are similar and the compressor power is sufficient or super-power, the electronic expansion valve is adjusted by 2-5 steps per minute, the exhaust temperature is lower than the target value, the electronic expansion valve is small, and vice versa.

7. The stability control method based on prototype performance testing of any of claims 4, 5, or 6, wherein: In the adjustment mode, if the prototype system does not have an electronic expansion valve, first adjust the compressor to make the compressor power similar to the target power, and then control the fan speed to fine-tune the system parameters.

8. The stability control method based on prototype performance testing of claim 6, wherein, Fine-tuning method: The temperature sensing component of the prototype system detects the temperature in real time; Adjust the inner fan speed to the maximum; When the prototype is running in the cooling test mode, if the exhaust temperature or condenser temperature is lower than the target value, reduce the outer fan speed to increase the temperature; If the exhaust temperature or condenser temperature is higher than the target value, increase the outer fan speed to reduce the temperature; When the prototype is running in the heating test mode, if the exhaust temperature or evaporator temperature is lower than the target value, increase the outer fan speed to increase the condenser temperature, thereby increasing the temperature; If the exhaust temperature or evaporator temperature is higher than the target value, reduce the outer fan speed to reduce the condenser temperature, thereby increasing the temperature.

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