Method, device and equipment for controlling enthalpy difference chamber equipment and storage medium

Abstract

The invention relates to the technical field of intelligent equipment, and discloses a method, device and equipment for controlling enthalpy difference chamber equipment and a storage medium. The method comprises the steps that in the current defrosting period of a tested air conditioner, if the current actual working condition temperature reaches the first set temperature, the previous control coefficient in PID control is corrected, the current control coefficient is obtained, corresponding PID control is conducted according to the current control coefficient, and the current defrosting period is not the first defrosting period; under the condition that the operation of the current defrosting period is finished, the current time proportion of the actual working condition temperature within the working condition allowable range in the current defrosting period is determined; and under the condition that the current time proportion is smaller than the previous time proportion, the previous control coefficient is determined as the optimal control coefficient, and corresponding PID control is carried out in the subsequent defrosting period according to the optimal control coefficient. Therefore, the success rate of the heating test of the air conditioner by the enthalpy difference chamber is improved.

Description

Technical Field

[0001] The present application relates to the field of intelligent device technology, for example, to methods, devices, equipment and storage media for controlling enthalpy difference chamber equipment. Background Art

[0002] The enthalpy difference chamber meets the requirements of GB / T7725-1996 standard and uses the air enthalpy difference method to test the cooling (heating) capacity of the air conditioner. It can test the performance of various single-phase, three-phase window-type, split-type and unit-type air conditioners. Therefore, the enthalpy difference chamber plays a vital role in the research and development, production and quality control of air conditioners.

[0003] During the heating project test in the enthalpy difference room, the air conditioner will experience frosting and defrosting. During the frosting process, as the frost accumulates, the capacity of the air conditioner outdoor unit decreases and the output cooling capacity gradually decreases. If the output correction of the enthalpy difference indoor working condition equipment is slow, the outdoor working condition will gradually increase. During the test, the maximum deviation of the outdoor working condition may exceed the national standard requirements, resulting in the test data being unusable and requiring retesting.

[0004] The enthalpy difference chamber equipment unit is equipped with electric heating and cooling machines. The cooling machine output can be fixed, and the proportional integral differential (PID) can be used to control the electric heating output, so that the cold and hot input and output of the enthalpy difference room air conditioner and the working equipment can reach a dynamic balance, so that the actual working condition can be stabilized around the target value. The current enthalpy difference chamber control system will perform PID control based on the difference between the target temperature and the actual temperature, the rate of change of the difference, etc., to correct the electric heating output. However, the coefficients of each PID control link are fixed. If the correction speed of the first defrost cycle in the enthalpy difference chamber test heating project of the air conditioner is too slow, causing the actual temperature to exceed the tolerance, then this problem may occur in each subsequent cycle, which will make the test data unusable.

[0005] 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 the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] 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 components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a method, apparatus, device and storage medium for controlling an enthalpy difference chamber device, so as to solve the technical problem that the success rate of the enthalpy difference chamber heating test for an air conditioner needs to be improved.

[0008] In some embodiments, the method comprises:

[0009] In the current defrost cycle of the test air conditioner, if the current actual operating temperature reaches the first set temperature, the previous control coefficient in the proportional integral differential PID control is corrected to obtain the current control coefficient, and the corresponding PID control is performed according to the current control coefficient, wherein the current defrost cycle is not the first defrost cycle;

[0010] When the current defrost cycle is finished, determine the current time proportion of the actual operating temperature within the allowable range of the operating condition in the current defrost cycle;

[0011] When the current time proportion is less than the previous time proportion, the previous control coefficient is determined as the optimal control coefficient, and in the subsequent defrosting cycle, the corresponding PID control is performed according to the optimal control coefficient.

[0012] In some embodiments, further comprising:

[0013] The first set temperature and the allowable range of the operating condition are determined according to the target operating temperature and the maximum operating temperature tolerance.

[0014] In some embodiments, the following also include:

[0015] Based on the previous control coefficient, start the PID control in the current defrost cycle.

[0016] In some embodiments, obtaining the current control coefficient includes:

[0017] The product of the differential coefficient and the multiplication coefficient in the previous control coefficient is determined as the differential coefficient in the current control coefficient, wherein the multiplication coefficient is greater than 1.

[0018] In some embodiments, it also includes:

[0019] When the current time proportion is greater than or equal to the previous time proportion, the current control coefficient is determined as the previous control number, and the current time proportion is determined as the previous time proportion.

[0020] In some embodiments, it also includes:

[0021] In the first defrost cycle of the test air conditioner, a first control coefficient is determined according to the actual operating temperature and the target operating temperature, and corresponding PID control is performed according to the first control coefficient;

[0022] When the first defrost cycle is completed, a first time proportion of the actual operating temperature within the operating condition allowable range during the first defrost cycle is determined.

[0023] In some embodiments, it also includes:

[0024] Before the second defrost cycle is run, the first control coefficient is determined as the previous control number, and the first time proportion is determined as the previous time proportion.

[0025] In some embodiments, the apparatus for controlling an enthalpy difference chamber device comprises a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for controlling an enthalpy difference chamber device when executing the program instructions.

[0026] In some embodiments, the device includes a device body; the above-mentioned device for controlling the enthalpy difference chamber device is installed on the device body.

[0027] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the above-mentioned method for controlling enthalpy difference chamber equipment is executed.

[0028] The method, device and equipment for controlling enthalpy difference chamber equipment provided by the embodiments of the present disclosure can achieve the following technical effects:

[0029] In the heating project of the enthalpy difference chamber air conditioner test, the PID control coefficient of the enthalpy difference chamber equipment in each defrost cycle can be continuously corrected to obtain the time proportion of the actual operating temperature within the allowable range of the operating conditions in each corresponding defrost cycle, and after determining the control coefficient corresponding to the maximum time proportion, that is, the optimal control coefficient, stop the correction, and in the subsequent defrost cycles, directly perform the corresponding PID control according to the optimal control coefficient. In this way, the time proportion of the actual operating temperature within the allowable range of the operating conditions in each defrost cycle can be increased, that is, after a period of PID control coefficient correction, the cold and hot input and output of the enthalpy difference room air conditioner and equipment can be balanced as much as possible, and the operating temperature is stably maintained within the target temperature tolerance range, thereby reducing the probability of test data being unusable and improving the success rate of the enthalpy difference chamber heating test of the air conditioner.

[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, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0032] Figure 1 It is a flow chart of a method for controlling an enthalpy difference chamber device provided by an embodiment of the present disclosure;

[0033] Figure 2It is a flow chart of a method for controlling an enthalpy difference chamber device provided by an embodiment of the present disclosure;

[0034] Figure 3 It is a schematic diagram of an enthalpy difference chamber test of air conditioning heating and defrosting effect provided by an embodiment of the present disclosure;

[0035] Figure 4 It is a structural schematic diagram of a control device for an enthalpy difference chamber device provided in an embodiment of the present disclosure;

[0036] Figure 5 It is a structural schematic diagram of a control device for an enthalpy difference chamber device provided in an embodiment of the present disclosure;

[0037] Figure 6 It is a structural schematic diagram of a control device for an enthalpy difference chamber device provided in an embodiment of the present disclosure;

[0038] Figure 7 It is a schematic diagram of a device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] In order to be able to understand the features and technical contents 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 attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the 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.

[0040] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0041] Unless otherwise stated, the term "plurality" means two or more.

[0042] 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 indicates: A or B.

[0043] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0044] The enthalpy difference chamber is based on the principles of thermodynamics and is used to measure the cooling or heating capacity of the air conditioning system. In the embodiment of the present disclosure, in the heating project of the air conditioner tested by the enthalpy difference chamber, the control coefficient of the PID of the enthalpy difference chamber equipment in each defrost cycle can be continuously corrected to obtain the time proportion of the actual operating temperature within the allowable range of the operating conditions in each corresponding defrost cycle, and after determining the control coefficient corresponding to the maximum time proportion, that is, the optimal control coefficient, the correction is stopped. In the subsequent defrost cycles, the corresponding PID control is directly performed according to the optimal control coefficient. In this way, the time proportion of the actual operating temperature within the allowable range of the operating conditions in each defrost cycle can be increased, that is, after a period of PID control coefficient correction, the cold and hot input and output of the air conditioner and equipment in the enthalpy difference chamber can be balanced as much as possible, and the operating temperature is stably maintained within the target temperature tolerance range, thereby reducing the probability of test data being unusable and improving the success rate of the enthalpy difference chamber heating test of the air conditioner.

[0045] Figure 1 FIG. 1 is a flow chart of a method for controlling an enthalpy difference chamber device provided by an embodiment of the present disclosure. Figure 1 As shown, the process of enthalpy difference chamber equipment control includes:

[0046] Step 101: During the current defrost cycle of the test air conditioner, if the current actual operating temperature reaches the first set temperature, the previous control coefficient in the proportional integral differential PID control is corrected to obtain the current control coefficient, and the corresponding PID control is performed based on the current control coefficient, wherein the current defrost cycle is not the first defrost cycle.

[0047] The enthalpy difference room equipment can be equipped with electric heating and cooling machines, wherein the cooling machine output can be fixed and the electric heating output can be controlled by PID, so that the cold and hot input and output of the enthalpy difference room air conditioner and the working equipment can reach a dynamic balance, so that the actual working condition can be stabilized around the target value. The enthalpy difference room equipment can also include a control device, which can be a separate device that can communicate with the cooling machine and the electric heating, or the control device can be a cooling machine, electric heating, etc. with control functions, and can also communicate with other devices to be controlled.

[0048] In the heating project of the enthalpy difference chamber test air conditioner, during the operation of the air-conditioning unit, due to the presence of frost, as the frost layer becomes thicker, the cooling output of the air-conditioning unit to the working environment gradually decreases. Therefore, it is necessary to control the output of the enthalpy difference chamber equipment, i.e., the electric heating, multiple times of PID control so that the cooling and heating input and output of the enthalpy difference chamber air conditioner and the working equipment reach a dynamic balance.

[0049] In this way, the enthalpy difference chamber equipment needs to perform multiple PID controls, that is, corresponding to multiple defrost cycles, and can control the output of the electric heating through the four-way valve control. The opening time of each four-way valve corresponds to the length of a defrost cycle. Among them, the current moment corresponds to the moment in the current defrost cycle of the test air conditioner.

[0050] In some embodiments, in the heating project of the test air conditioner, the first PID control process of the enthalpy difference chamber equipment can be operated accordingly according to relevant technologies, and may include: in the first defrost cycle of the test air conditioner, according to the actual operating temperature and the target operating temperature, determining the first control coefficient, and performing corresponding PID control according to the first control coefficient.

[0051] In this way, during the second PID control, the first control coefficient is the control coefficient corresponding to the previous PID control, that is, the previous control coefficient. In the disclosed embodiment, in the PID control corresponding to each defrosting cycle, the previous control coefficient is corrected according to the actual operating temperature obtained until the previous control coefficient is the optimal control coefficient, and then subsequent PID control is performed according to the optimal control coefficient.

[0052] During the current defrost cycle of the test air conditioner, the actual operating temperature can be detected in real time or at regular intervals. The current moment corresponds to the current actual operating temperature. When the current actual operating temperature reaches the moment corresponding to the first set temperature, the previous control coefficient in the PID control needs to be corrected to obtain the current control coefficient, and the corresponding PID control is performed based on the current control coefficient.

[0053] In some embodiments, the first set temperature and the operating condition allowable range are determined according to the target operating temperature and the maximum operating temperature tolerance. tar If the maximum operating tolerance is ±b℃, the first set temperature T1 can be (a+b / 2)℃, (a+b / 3)℃, or (a+c)℃, etc., where c <b。

[0054] In some embodiments, the PID control in the current defrost cycle is started according to the previous control coefficient. That is, in the current defrost cycle of the test air conditioner, the PID control of the enthalpy room difference device is started according to the previous control coefficient. At this time, it corresponds to the start time t1 of the current defrost cycle, and in the current defrost cycle, the actual operating temperature is detected in real time or at a fixed time. When the current operating temperature obtained reaches the first set temperature T1, the corresponding time point is t3, and the four-way valve is controlled to be closed, corresponding to the end time t2 of the current defrost cycle. In this way, during the period of t1-t3, the corresponding PID control is still performed according to the previous control coefficient, and when t3 is reached, the previous control coefficient needs to be corrected to obtain the current control coefficient, and during the period of t3-t2, the corresponding PID control is performed according to the current control coefficient.

[0055] PID (proportion, integration, differentiation) stands for proportional control (P), integral control (I), and differential control (D). The basic formula of PID control is as follows:

[0056]

[0057] The basic requirements for automatic control systems are usually: stability, accuracy, and speed. Among them, stability means that in a balanced state, after a certain disturbance, the controlled quantity of the system can reach a certain stable state after a period of time. Reducing P and I, or increasing D, can improve the stability of the system. In the embodiment of the present disclosure, correcting the previous control coefficient in the PID control may include: increasing the differential coefficient in the previous control coefficient, that is, increasing D, so that the stability of the system can be improved.

[0058] There are many ways to increase the differential coefficient, i.e., D, including: increasing a fixed value, or increasing proportionally, etc. In some embodiments, obtaining the current control coefficient includes: multiplying the differential coefficient in the previous control coefficient by the multiplier coefficient, and determining it as the differential coefficient in the current control coefficient, wherein the multiplier coefficient is greater than 1.

[0059] For example: The differential coefficient in the current control coefficient is D n , the differential coefficient in the previous control coefficient is D (n-1) , so, D n =D (n-1) *k, where n is an integer greater than 1, and k is a coefficient greater than 1. Of course, the embodiments of the present disclosure are not limited to prediction, and the system stability can also be improved by reducing P and I, for example: the product of the integral coefficient in the previous control coefficient and the downward adjustment coefficient is determined as the integral coefficient in the current control coefficient, where the downward adjustment coefficient is greater than 1. The specific examples are not listed one by one.

[0060] Step 102: When the current defrost cycle is finished, determine the current time proportion of the actual operating temperature within the operating condition allowable range during the current defrost cycle.

[0061] During the current defrost cycle of the test air conditioner, the corresponding actual operating temperature can be checked in real time or at regular intervals, and the corresponding time can also be obtained. In this way, the length of time that the actual operating temperature is within the allowable range of the operating condition can be obtained, that is, the effective time t y , thus, we can get the current time proportion m of the actual working temperature within the allowable range of the working condition in the current defrost cycle n ,Right now Likewise, n is an integer greater than 1.

[0062] Step 103: When the current time proportion is less than the previous time proportion, the previous control coefficient is determined as the optimal control coefficient, and in the subsequent defrosting cycle, the corresponding PID control is performed according to the optimal control coefficient.

[0063] From the above steps, it can be seen that for each defrost cycle, the actual operating temperature is within the allowable range of the operating condition, which accounts for m n , n is an integer greater than 1. In addition, in some embodiments, when the first defrost cycle ends, the first time proportion of the actual operating temperature within the operating condition allowable range in the first defrost cycle is determined. In this way, before the second defrost cycle runs, the first control coefficient is determined as the previous control number, and the first time proportion is determined as the previous time proportion.

[0064] In this way, starting from the second defrost cycle, the current time ratio can be smaller than the previous time ratio.

[0065] Therefore, the current time can be accounted for m n The ratio of time to the previous time m n-1 For comparison, if m n <m n-1 , indicating that the current control coefficient correction control is invalid, and the previous control coefficient can be determined as the optimal control coefficient, that is, the differential coefficient in the previous control coefficient is D (n-1) It can be the optimal differential coefficient, so that in the subsequent defrosting cycle, the corresponding PID control is performed according to the optimal control coefficient. That is, the control coefficient corresponding to the maximum time proportion has been determined, and there is no need to correct the control coefficient in the future. The corresponding PID control is performed directly according to the optimal control coefficient.

[0066] If m n ≥m n-1 , it indicates that the current control coefficient correction control is effective and can continue to be corrected. Therefore, in some embodiments, when the current time proportion is greater than or equal to the previous time proportion, the current control coefficient is determined as the previous control coefficient, and the current time proportion is determined as the previous time proportion. In this way, in the subsequent defrosting cycle, the control coefficient corresponding to the maximum time proportion, that is, the optimal control coefficient, can be determined based on the previous control coefficient and the previous time proportion.

[0067] It can be seen that in the embodiment of the present invention, in the heating project of the enthalpy difference chamber test air conditioner, the PID control coefficient of the enthalpy difference chamber equipment in each defrost cycle can be continuously corrected to obtain the time proportion of the actual operating temperature within the allowable range of the operating conditions in each corresponding defrost cycle, and after determining the control coefficient corresponding to the maximum time proportion, that is, the optimal control coefficient, the correction is stopped. In the subsequent defrost cycles, the corresponding PID control is performed directly according to the optimal control coefficient. In this way, the time proportion of the actual operating temperature within the allowable range of the operating conditions in each defrost cycle can be increased. That is, after a period of time of correction of the PID control coefficient, the cold and hot input and output of the air conditioner and equipment in the enthalpy difference chamber can be balanced as much as possible, and the operating temperature is stably maintained within the target temperature tolerance range, thereby reducing the probability of test data being unusable and improving the success rate of the enthalpy difference chamber heating test of the air conditioner.

[0068] The operation flow is collected into a specific embodiment below to illustrate the enthalpy difference chamber equipment control process provided by the embodiment of the present invention.

[0069] In one embodiment of the present disclosure, the enthalpy difference chamber can perform a heating test on the air conditioner, and can perform PID control on the electric heating. In this embodiment, the target operating temperature T tar The maximum operating tolerance is a℃, and the maximum operating tolerance is ±b℃, where a=2℃, b=0.4℃. In this way, the first set temperature T1=2.2℃, and the corresponding operating tolerance range is 2±0.4℃.

[0070] Figure 2 FIG. 1 is a flow chart of a method for controlling an enthalpy difference chamber device provided by an embodiment of the present disclosure. Figure 2 As shown, the enthalpy difference chamber equipment control process includes:

[0071] Step 201: In the first defrost cycle of the test air conditioner, the enthalpy difference chamber device determines a first control coefficient according to the actual operating temperature and the target operating temperature, and performs corresponding PID control according to the first control coefficient.

[0072] The first control coefficient includes the first differential coefficient D 1 .

[0073] Step 202: During the corresponding PID control process, the enthalpy difference chamber device monitors the actual operating temperature, and when the first defrost cycle is completed, determines the first time proportion m of the actual operating temperature within the operating condition allowable range during the first defrost cycle. 1 , and determine the first control coefficient as the previous control coefficient, and determine the first time proportion as the previous time proportion.

[0074] Step 203: Determine whether the optimal control coefficient has been determined. If so, execute step 213; otherwise, execute step 204.

[0075] Step 204: The enthalpy difference chamber device starts the PID control in the current defrosting cycle according to the previous control coefficient.

[0076] Step 205: The enthalpy difference chamber equipment monitors the actual operating temperature in the current defrost cycle.

[0077] Step 206: Determine whether the current actual operating temperature reaches the first set temperature. If yes, execute step 207; otherwise, return to step 205.

[0078] Step 207: The enthalpy difference chamber device determines the product of the differential coefficient and the multiplication coefficient in the previous control coefficient as the differential coefficient in the current control coefficient, and obtains the current control coefficient.

[0079] The differential coefficient in the current control coefficient is D n , the differential coefficient in the previous control coefficient is D (n-1) , so, D n =D (n-1) *k, where n is an integer greater than 1 and k is a coefficient greater than 1.

[0080] Step 208: The enthalpy difference chamber equipment performs corresponding PID control on the electric heating according to the current control coefficient until the current defrost cycle ends, and continues to monitor the actual operating temperature in the current defrost cycle during the PID control process.

[0081] Step 209: The enthalpy difference chamber device determines the current time proportion m of the actual operating temperature within the operating condition allowable range in the current defrosting cycle n .

[0082] Step 210: Is it true that the current time proportion is less than the previous time proportion? If so, execute step 211; otherwise, execute step 212.

[0083] m n <m n-1 , execute step 211.

[0084] Step 211: The enthalpy difference chamber device determines the previous control coefficient as the optimal control coefficient and returns to step 203.

[0085] D (n-1) The optimal differential coefficient is determined, that is, the optimal control coefficient is obtained, and the process returns to step 203 .

[0086] Step 212: The enthalpy difference chamber device determines the current control coefficient as the previous control coefficient, and determines the current time proportion as the previous time proportion. Return to step 203.

[0087] Step 213: The enthalpy difference chamber equipment performs corresponding PID control according to the optimal control coefficient until the air conditioning heating test is completed.

[0088] Figure 3 Schematic diagram of an enthalpy difference chamber test of air conditioning heating and defrosting provided by an embodiment of the present disclosure. Figure 3 As shown, at time t1-t2, it corresponds to the first defrosting cycle, at time t3, T act =2.2°C, that is, the first set temperature is reached, and the first defrosting cycle does not modify the PID control parameters. Therefore, at this time, the first control coefficient includes the first differential coefficient D 1 At time t2, that is, when the first defrost cycle ends, the first time proportion m of the actual operating temperature within the allowable range of the operating condition can be obtained. 1 .

[0089] The moment t2 is the end moment of the first defrost cycle and the start moment t1' of the second defrost cycle. Thus, the moment t1'-t2' corresponds to the second defrost cycle. Thus, starting from the moment t1', the electric heating is still controlled by the first control coefficient. However, at the moment t3', T act =2.2℃, that is, the first set temperature is reached. At this time, the first control coefficient is corrected to obtain the second differential coefficient D 2 =D 1 *k, that is, the second control coefficient is obtained. At t3'-t2', the electric heating is controlled correspondingly according to the second control coefficient. At t2', when the second defrost cycle ends, the second time proportion m of the actual operating temperature within the allowable range of the operating condition can be obtained. 2 .

[0090] If m 2 <m 1 , indicating that the control coefficient correction control is invalid, including D 1 The first control coefficient is determined as the optimal control coefficient. Thus, starting from the third defrost cycle, the electric heating is subjected to corresponding PID control according to the optimal control coefficient. Here, in the third defrost cycle, according to the control coefficient including D 1 The first control coefficient of D is used to perform corresponding PID control on the electric heating. In the fourth defrosting cycle, the PID control is also performed according to the first control coefficient of D. 1 The first control coefficient is used to perform corresponding PID control on the electric heating until the end of this air conditioning heating test project.

[0091] If m 2 ≥m 1 , indicating that the control coefficient correction control is effective, then save m 2 , and including D2 Similarly, time t2' is the end time of the second defrost cycle and also the start time t1' of the third defrost cycle. Thus, time t1'-t2' corresponds to the third defrost cycle. Thus, starting from time t1', the electric heating is still controlled by the second control coefficient; but at time t3', T act =2.2℃, that is, the first set temperature is reached. At this time, the second control coefficient is corrected to obtain the third differential coefficient D 3 =D 2 *k=D 1 *k 2 , that is, the third control coefficient is obtained. At t3"-t2" time, the corresponding PID control is performed on the electric heating according to the third control coefficient; at t2" time, when the third defrost cycle ends, the third time proportion m of the actual operating temperature within the allowable range of the operating condition can be obtained in the third defrost cycle. 3 .

[0092] If m 3 <m 2 , including D 2 The second control coefficient is determined as the optimal control coefficient. Thus, starting from the fourth defrosting cycle, the electric heating is controlled by the corresponding PID according to the optimal control coefficient until the end of this air conditioning heating test project. 3≥ m 2 , then save m 3 , and including D 3 The third control coefficient.

[0093] As mentioned above, the defrost cycle is repeated continuously, including D n-1 The (n-1)th control coefficient is used to start PID control, and when the current actual operating temperature reaches the first set temperature, the nth differential coefficient D is obtained. n =D 1 *k n-1 , that is, the nth control coefficient is obtained, and then the corresponding PID control is performed on the electric heating with the nth control coefficient, and at the end of the nth defrosting cycle, the nth time proportion m of the actual operating temperature within the allowable range of the operating condition can be obtained n If m n <m n-1 , including D n-1 The (n-1)th control coefficient is determined as the optimal control coefficient, and then the corresponding PID control of the electric heating is carried out according to the optimal control coefficient until the end of this air conditioning heating test project. n≥ m n-1 , then save the nth time proportion m n , and including Dn The nth control coefficient is obtained and the optimal control coefficient is determined.

[0094] It can be seen that in the present embodiment, in the heating project of the enthalpy difference chamber test air conditioner, the PID control coefficient of the enthalpy difference chamber equipment in each defrost cycle can be continuously corrected to obtain the time proportion of the actual operating temperature within the allowable range of the operating conditions in each corresponding defrost cycle, and after determining the control coefficient corresponding to the maximum time proportion, that is, the optimal control coefficient, the correction is stopped, and in the subsequent defrost cycles, the corresponding PID control is performed directly according to the optimal control coefficient. In this way, the time proportion of the actual operating temperature within the allowable range of the operating conditions in each defrost cycle can be increased, that is, after a period of PID control coefficient correction, the cold and hot input and output of the enthalpy difference room air conditioner and equipment can be balanced as much as possible, and the operating temperature is stably maintained within the target temperature tolerance range, thereby reducing the probability of test data being unusable and improving the success rate of the enthalpy difference chamber heating test of the air conditioner.

[0095] According to the above process for controlling enthalpy difference chamber equipment, a device for controlling enthalpy difference chamber equipment can be constructed.

[0096] Figure 4 Schematic diagram of a structure of a control device for an enthalpy difference chamber provided by an embodiment of the present disclosure. Figure 4 As shown, the enthalpy difference chamber equipment control device 400 includes: a correction control module 410, a proportion determination module 420 and a determination control module 430.

[0097] The correction control module 410 is configured to correct the previous control coefficient in the proportional integral differential PID control to obtain the current control coefficient if the current actual operating temperature reaches the first set temperature during the current defrost cycle of the tested air conditioner, and perform the corresponding PID control based on the current control coefficient, wherein the current defrost cycle is not the first defrost cycle.

[0098] The proportion determination module 420 is configured to determine the current time proportion of the actual operating temperature within the operating condition allowable range in the current defrost cycle when the current defrost cycle ends.

[0099] The control module 430 is configured to determine the previous control coefficient as the optimal control coefficient when the current time proportion is less than the previous time proportion, and perform corresponding PID control according to the optimal control coefficient in the subsequent defrosting cycle.

[0100] In some embodiments, it also includes: a first determination module, configured to determine a first set temperature and an allowable operating range according to a target operating temperature and a maximum operating temperature tolerance.

[0101] In some embodiments, the correction control module 410 is further configured to start the PID control in the current defrost cycle according to the previous control coefficient.

[0102] In some embodiments, the correction control module 410 is specifically configured to determine the product of the differential coefficient and the multiplication coefficient in the previous control coefficient as the differential coefficient in the current control coefficient, wherein the multiplication coefficient is greater than 1.

[0103] In some embodiments, it also includes: a second determination module, which is configured to determine the current control coefficient as the previous control coefficient and the current time proportion as the previous time proportion when the current time proportion is greater than or equal to the previous time proportion.

[0104] In some embodiments, it also includes: a first control module, which is configured to determine a first control coefficient according to the actual operating temperature and the target operating temperature during the first defrost cycle of the tested air conditioner, and perform corresponding PID control according to the first control coefficient; when the first defrost cycle ends, determine the first time proportion of the actual operating temperature within the allowable range of the operating conditions during the first defrost cycle.

[0105] In some embodiments, the first control module is further configured to determine the first control coefficient as the previous control number and the first time proportion as the previous time proportion before the second defrost cycle runs.

[0106] The enthalpy difference chamber equipment control process used in the enthalpy difference chamber equipment control device is further described below in conjunction with the embodiments.

[0107] In this embodiment, the enthalpy difference chamber can perform heating test on the air conditioner, and can perform PID control on the electric heating. In this embodiment, the target operating temperature T tar The temperature is a℃, and the maximum operating tolerance is ±b℃, where a=3℃, b=0.6℃.

[0108] Figure 5 Schematic diagram of a structure of a control device for an enthalpy difference chamber provided by an embodiment of the present disclosure. Figure 5 As shown, the enthalpy difference chamber equipment control device 400 includes: a correction control module 410, a proportion determination module 420, a determination control module 430, a first determination module 440, a second determination module 450, and a first control module 460.

[0109] In this embodiment, the first determination module 440 can determine the first set temperature to be 3.3° C. and the operating condition allowable range to be 3±0.6° C. according to the target operating temperature and the maximum operating temperature tolerance.

[0110] In this way, the enthalpy difference room can test the air conditioner and start the heating. The first control module 460 determines the first control coefficient according to the actual working temperature and the target working temperature, and performs corresponding PID control according to the first control coefficient. In the process of PID control, the actual working temperature is monitored, and when the first defrost cycle is completed, the first time proportion m of the actual working temperature within the allowable range of the working condition is determined in the first defrost cycle. 1 The first control module 460 also saves the first control coefficient as the previous control coefficient and sets the first time proportion m 1 Save as the last time percentage.

[0111] Thus, in each subsequent defrost cycle, if the optimal control coefficient has not been determined, the correction control module 410 starts the PID control in the current defrost cycle based on the previous control coefficient, and when the current actual operating temperature reaches the first set temperature, the product of the differential coefficient and the multiplier coefficient in the previous control coefficient is determined as the differential coefficient in the current control coefficient, and the current control coefficient is obtained, and, based on the current control coefficient, the corresponding PID control is performed on the electric heating until the end of the current defrost cycle.

[0112] During the PID control process, the enthalpy difference chamber equipment control device 400 has been monitoring the actual operating temperature in the current defrost cycle. Therefore, at the end of the current defrost cycle, the proportion determination module 420 can determine the current time proportion m of the actual operating temperature within the operating condition allowable range in the current defrost cycle. n。

[0113] If the current time proportion is less than the previous time proportion, the control module 430 may determine the previous control coefficient as the optimal control coefficient, and perform corresponding PID control according to the optimal control coefficient in the subsequent defrosting cycle.

[0114] If the current time proportion is greater than or equal to the previous time proportion, the second determination module 450 determines the current control coefficient as the previous control coefficient and the current time proportion as the previous time proportion. Then, the optimal control coefficient is obtained through the correction control module 410, the proportion determination module 420 and the determination control module 430, and then the corresponding PID control is performed.

[0115] It can be seen that in the present embodiment, in the heating project of the enthalpy difference chamber test air conditioner, the device for controlling the enthalpy difference chamber equipment can continuously correct the PID control coefficient of the enthalpy difference chamber equipment in each defrost cycle, and obtain the time proportion of the actual operating temperature within the allowable range of the operating conditions in each corresponding defrost cycle, and stop correcting after determining the control coefficient corresponding to the maximum time proportion, that is, the optimal control coefficient. In the subsequent defrost cycles, the corresponding PID control is performed directly according to the optimal control coefficient. In this way, the time proportion of the actual operating temperature within the allowable range of the operating conditions in each defrost cycle can be increased, that is, after a period of PID control coefficient correction, the cold and hot input and output of the enthalpy difference room air conditioner and equipment can be balanced as much as possible, and the operating temperature is stably maintained within the target temperature tolerance range, thereby reducing the probability of test data being unusable and improving the success rate of the enthalpy difference chamber heating test of the air conditioner.

[0116] Combination Figure 6 The embodiment of the present disclosure provides a device 600 for controlling an enthalpy difference chamber device, comprising:

[0117] The processor 1000 and the memory 1001 may also include a communication interface 1002 and a bus 1003. The processor 1000, the communication interface 1002, and the memory 1001 may communicate with each other through the bus 1003. The communication interface 1002 may be used for information transmission. The processor 1000 may call the logic instructions in the memory 1001 to execute the method for controlling the enthalpy difference chamber device of the above embodiment.

[0118] In addition, the logic instructions in the above-mentioned memory 1001 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.

[0119] The memory 1001 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 1000 executes the functional application and data processing by running the program instructions / modules stored in the memory 1001, that is, the method for controlling the enthalpy difference chamber device in the above method embodiment is implemented.

[0120] The memory 1001 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 1001 may include a high-speed random access memory and may also include a non-volatile memory.

[0121] An embodiment of the present disclosure provides a device for controlling an enthalpy difference chamber device, comprising: a processor and a memory storing program instructions, wherein the processor is configured to execute a method for controlling an enthalpy difference chamber device when executing the program instructions.

[0122] Combination Figure 7 , the embodiment of the present disclosure provides a device 700, which can be used in an enthalpy difference chamber, that is, an enthalpy difference chamber device, which can control electric heating, and may include: a device body, and the above-mentioned enthalpy difference chamber device control device 400 (600). The enthalpy difference chamber device control device 400 (600) is installed on the device 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. It can be understood by those skilled in the art that the enthalpy difference chamber device control device 400 (600) can be adapted to a feasible device body, thereby realizing other feasible embodiments.

[0123] An embodiment of the present disclosure provides a storage medium storing program instructions, which, when run, execute the above-mentioned method for controlling enthalpy difference chamber equipment.

[0124] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned method for controlling enthalpy difference chamber equipment.

[0125] The above-mentioned storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0126] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient 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 codes, or a transient storage medium.

[0127] 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 changes. Unless explicitly required, individual components and functions are optional, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the present disclosure includes the entire scope of the claims, and all available equivalents of the claims. When used in this application, although the terms "first", "second", etc. may be used in this application to describe each element, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without changing the meaning of the description, the first element can be called the second element, and similarly, the second element can be called the first element, as long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first element and the second element are both elements, but may not be the same element. 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, the singular forms "a", "an" and "the" are intended to include the plural forms as well. 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 variants "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, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer 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 refer to the description of the method part.

[0128] 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 for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0129] 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 only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, 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, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed 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 according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0130] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order 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, and 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 functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling an enthalpy difference chamber device, characterized in that: include: In the current defrost cycle of the test air conditioner, if the current actual operating temperature reaches the first set temperature, the previous control coefficient in the proportional integral differential PID control is corrected to obtain the current control coefficient, and the corresponding PID control is performed according to the current control coefficient, wherein the current defrost cycle is not the first defrost cycle; When the current defrost cycle is finished, determine the current time proportion of the actual operating temperature within the allowable range of the operating condition in the current defrost cycle; When the current time proportion is less than the previous time proportion, the previous control coefficient is determined as the optimal control coefficient, and in the subsequent defrosting cycle, the corresponding PID control is performed according to the optimal control coefficient.

2. The method according to claim 1, characterized in that Also includes: The first set temperature and the allowable range of the operating condition are determined according to the target operating temperature and the maximum operating temperature tolerance.

3. The method according to claim 1, characterized in that Also includes: Based on the previous control coefficient, start the PID control in the current defrost cycle.

4. The method according to claim 1, characterized in that: The obtaining of the current control coefficient includes: The product of the differential coefficient and the multiplication coefficient in the previous control coefficient is determined as the differential coefficient in the current control coefficient, wherein the multiplication coefficient is greater than 1.

5. The method according to claim 1, characterized in that Also includes: When the current time proportion is greater than or equal to the previous time proportion, the current control coefficient is determined as the previous control coefficient, and the current time proportion is determined as the previous time proportion.

6. The method according to any one of claims 1 to 4, characterized in that: Also includes: In the first defrost cycle of the test air conditioner, a first control coefficient is determined according to the actual operating temperature and the target operating temperature, and corresponding PID control is performed according to the first control coefficient; When the first defrost cycle is completed, a first time proportion of the actual operating temperature within the operating condition allowable range during the first defrost cycle is determined.

7. The method according to claim 5, characterized in that Also includes: Before the second defrost cycle is run, the first control coefficient is determined as the previous control number, and the first time proportion is determined as the previous time proportion.

8. A device for controlling an enthalpy difference chamber device, the device comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to perform the method for controlling an enthalpy difference chamber device according to any one of claims 1 to 7 when executing the program instructions.

9. A device, characterized in that: include: Equipment body; The device for controlling enthalpy difference chamber equipment as claimed in claim 8 is installed on the equipment body.

10. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling the enthalpy difference chamber equipment as described in any one of claims 1 to 7 is executed.

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