Air conditioner and normal operation method and system for electronic expansion valve of air conditioner

Abstract

The invention discloses an air conditioner and a normal operation method and system for an electronic expansion valve of the air conditioner, and the normal operation method for the electronic expansion valve comprises the steps that in the starting process of the air conditioner, the electronic expansion valve is normally reset and operates; after the electronic expansion valve is normally reset, one-way action is conducted according to the instruction, the peak value of the operation waveform of the electronic expansion valve is obtained in real time, and when the peak value changes, the starting time of peak value change is recorded; calculating the difference value of the starting time of the change of two adjacent peak values to obtain excitation time; analyzing whether the electronic expansion valve is out of step or not according to the excitation time, and recording the accumulated out-of-step step number and the current direction; after the electronic expansion valve completes the one-way action according to the instruction, the electronic expansion valve continues to run towards the current direction to accumulate the step number of out-of-step, and the accumulated step number of out-of-step is reset; according to the method, it can be guaranteed that the electronic expansion valve accurately completes the step number specified in the instruction, the situations of out-of-step or inaccurate adjustment and the like can be effectively avoided, and normal operation of the electronic expansion valve is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly relates to an air conditioner and a normal operation method and system of an electronic expansion valve thereof. BACKGROUND

[0002] Air conditioners are essential in daily use, and with different user experiences and functional requirements, different models of air conditioners are increasing. In the increasing complex air conditioner models, the electronic expansion valve in the air conditioner is essential, and the electronic expansion valve often plays a key role. The main function of the electronic expansion valve in the air conditioner is to accurately control the flow of refrigerant, thereby adjusting the pressure and temperature in the evaporator to ensure efficient operation of the air conditioning system.

[0003] Each time the electronic expansion valve is operated based on the 0 position. For example, if the valve is opened by 100 steps, the valve will be opened by 100 steps at the 0 position. However, it is unknown whether there is a step loss because only the number of steps of the expansion valve can be told, and it cannot be known whether the valve is opened to the 100-step position. As a result, the expansion valve may have a control failure problem, such as needing to open the valve by 100 steps, but losing 10 steps, and only opening the valve by 90 steps, which may cause differences in system operation and greatly affect the normal operation of the system. It is easy to have a step loss or inaccurate adjustment, and if not handled in time, it may cause safety hazards. SUMMARY

[0004] To solve the problems in the prior art, the present application provides an air conditioner and a normal operation method and system of an electronic expansion valve thereof.

[0005] The present application adopts the following technical solutions:

[0006] The present application provides a normal operation method of an electronic expansion valve, comprising the following steps:

[0007] During the starting process of the air conditioner, the electronic expansion valve is normally reset and operated;

[0008] After the electronic expansion valve is normally reset, a one-way action is performed according to an instruction, and a peak value of an operation waveform of the electronic expansion valve is acquired in real time. When the peak value changes, the starting time of the peak value change is recorded;

[0009] The difference between the starting times of adjacent two peak values is calculated to obtain an excitation time;

[0010] Whether the electronic expansion valve is out of step is analyzed according to the excitation time, and the cumulative out-of-step step number and the current direction are recorded;

[0011] After the one-way action of the electronic expansion valve is completed according to the instruction, the cumulative out-of-step step number is continued to be operated in the current direction, and the cumulative out-of-step step number is reset.

[0012] According to the electronic expansion valve normal operation method, the electronic expansion valve is determined whether to be out of step according to the excitation time, and the accumulated out-of-step step number and the current direction are recorded, and specifically comprising the following steps:

[0013] If the excitation time is greater than or equal to the first excitation time and less than or equal to the second excitation time, it is determined that the electronic expansion valve is not out of step; otherwise, it is determined that the electronic expansion valve is out of step once, and the accumulated out-of-step step number and the current direction are recorded.

[0014] According to the electronic expansion valve normal operation method, the method further comprises: performing air conditioner state detection every interval time t, if the air conditioner is in the on state, the air conditioner continues to operate, and if the air conditioner is in the off state, the health detection is performed on the electronic expansion valve.

[0015] According to the electronic expansion valve normal operation method, the health detection comprises the following steps:

[0016] The electronic expansion valve is normally reset;

[0017] The electronic expansion valve is operated to the maximum position, and in this process, the accumulated out-of-step step number is recorded, and when the maximum position is reached, the accumulated out-of-step step number is reset;

[0018] The electronic expansion valve is operated to the minimum position, and in this process, the accumulated out-of-step step number is recorded, and when the minimum position is reached, the accumulated out-of-step step number is reset.

[0019] According to the electronic expansion valve normal operation method, when the accumulated out-of-step step number is less than or equal to a first preset value, it is determined that the electronic expansion valve is excellent, and the electronic expansion valve can continue to be used;

[0020] When the accumulated out-of-step step number is greater than the first preset value and less than or equal to a second preset value, it is determined that the electronic expansion valve is medium, a prompt is issued, and the user selects to repair or continue to use the electronic expansion valve;

[0021] When the accumulated out-of-step step number is greater than the second preset value, it is determined that the electronic expansion valve is poor, and the electronic expansion valve is reminded to be repaired or replaced.

[0022] The second aspect of the application provides an electronic expansion valve normal operation system for realizing the above normal operation method, and the system comprises:

[0023] The signal acquisition module is used for acquiring the peak value of the running waveform of the electronic expansion valve in real time;

[0024] The processing and analysis module is used for calculating the difference between the start times of adjacent two peak value changes to obtain the excitation time, and determining whether the electronic expansion valve is out of step according to the excitation time;

[0025] The storage module is used for recording the start time of the peak value change, and recording the accumulated out-of-step step number and the current direction.

[0026] an output module configured to output the accumulated step-out steps and the current direction to the host program;

[0027] a host program configured to control the electronic expansion valve to continue running in the current direction for the accumulated step-out steps and reset the accumulated step-out steps after the electronic expansion valve completes the one-way action according to the instruction.

[0028] The third aspect of the present application provides an air conditioner, comprising: the electronic expansion valve normal operation system.

[0029] The fourth aspect of the present application provides a storage medium, comprising a stored program, wherein the device where the storage medium is located executes the normal operation method when the program runs.

[0030] Compared with the prior art, the present application has at least the following beneficial effects:

[0031] 1. The present application obtains the excitation time through the change of the peak value of the running waveform of the electronic expansion valve, and then obtains the step-out information according to the excitation time, and finally continues to compensate the step-out steps according to the step-out information, so as to ensure that the electronic expansion valve can accurately complete the specified steps in the instruction, and effectively avoid the situation of step-out or inaccurate adjustment, thereby ensuring the normal operation of the electronic expansion valve.

[0032] 2. The present application can monitor the health status of the electronic expansion valve and give an early warning, so that the air conditioner becomes more intelligent and durable, and the quality of the air conditioner product and the user experience are improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0034] Figure 1 Flow chart of the electronic expansion valve normal operation method of the present application;

[0035] Figure 2 Peak value diagram of the running waveform of the preferred embodiment of the present application;

[0036] Figure 3 Logical connection diagram of the electronic expansion valve and the waveform detection module of the preferred embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one example embodiment is merely illustrative in nature and not intended to limit the present application and its applications or uses in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0038] The relative arrangement, numerical expressions, and numerical values of the components and steps set forth in the embodiments are not intended to limit the scope of the present application, unless otherwise specifically stated.

[0039] It should be understood that the sizes of the various parts shown in the drawings are not drawn according to the actual proportion relationship for the convenience of description.

[0040] The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized description, if appropriate.

[0041] In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative, and not as a limitation. Thus, other examples of example embodiments can have different values.

[0042] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0043] At present, the air conditioner cannot directly obtain the opening size of the electronic expansion valve, and after each start, the air conditioner often confirms the current opening of the electronic expansion valve by resetting the electronic expansion valve action, because the opening after the resetting electronic expansion valve action is 0, so as to confirm the opening size of the electronic expansion valve, and the resetting is completed as 0. Since the current electronic expansion valve step number is unknown, the electronic expansion valve needs to be processed by multiple step numbers, which is also to ensure that the electronic expansion valve can be closed to the position of 0.

[0044] As shown in FIG. 1, the embodiment 1 of the present application provides a normal operation method of an electronic expansion valve, which comprises the following steps: Figure 1

[0045] Step S110, during the starting process of the air conditioner, the electronic expansion valve is normally reset and operated;

[0046] ​The existing reset method is used for resetting, in an embodiment, the maximum opening degree of the electronic expansion valve in the air conditioner is 500 steps, and the air conditioner reset action needs to close the expansion valve for 500+100=600 steps; in another embodiment, the maximum opening degree of the electronic expansion valve in the air conditioner is 600 steps, and the air conditioner reset action needs to close the expansion valve for 600+200=800 steps. Other reset methods can also be used to normally reset the electronic expansion valve.

[0047] In step S120, after the electronic expansion valve is normally reset, one-way action is performed according to the instruction, and the peak value of the running waveform of the electronic expansion valve is acquired in real time, and when the peak value changes, the starting time of the peak value change is recorded.

[0048] The peak value of the running waveform is acquired through the electronic expansion valve drive signal pin, and when the voltage peak value of any drive signal pin changes, the starting time of the peak value change is recorded.

[0049] The peak value change is from high level to low level or from low level to high level, that is, the starting time corresponding to the change of high and low levels.

[0050] The electronic expansion valve has only two adjustment directions, to increase or decrease the opening degree, and after the electronic expansion valve receives the instruction to adjust the opening degree, it will open or close in the same direction for a certain number of steps.

[0051] In step S130, the difference between the starting times of two adjacent peak values is calculated to obtain the excitation time.

[0052] Each time difference is calculated by the following formula:

[0053] T 起始n+1 -T 起始n =T 差值n

[0054] In step S140, whether the electronic expansion valve is out of step is analyzed according to the excitation time, and the cumulative out-of-step step number and the current direction are recorded.

[0055] If the excitation time is greater than or equal to the first excitation time T min and less than or equal to the second excitation time T max , it is determined that the electronic expansion valve is not out of step; otherwise, it is determined that the electronic expansion valve is out of step once, and the cumulative out-of-step step number and the current direction are recorded.

[0056] The current direction is the direction in which the electronic expansion valve is moving.

[0057] In step S150, after the electronic expansion valve completes one-way action according to the instruction, the electronic expansion valve continues to run in the current direction for the cumulative out-of-step step number, and the cumulative out-of-step step number is reset.

[0058] Preferably but not limitedly, the normal operation method further comprises: performing air conditioner state detection every interval time t, if the air conditioner is in the on state, the air conditioner continues to operate, and if the air conditioner is in the off state, health detection is performed on the electronic expansion valve.

[0059] The health detection comprises the following steps:

[0060] The electronic expansion valve is normally reset;

[0061] The electronic expansion valve is operated to the maximum position, in the process, the cumulative step loss number is recorded, and when the maximum position is reached, the cumulative step loss number is reset;

[0062] The electronic expansion valve is operated to the minimum position, in the process, the cumulative step loss number is recorded, and when the minimum position is reached, the cumulative step loss number is reset.

[0063] Preferably but not limitedly, when the cumulative step loss number is less than or equal to a first preset value n1, it is determined that the electronic expansion valve is excellent, and the electronic expansion valve can continue to be used;

[0064] When the cumulative step loss number is greater than the first preset value n1 and less than or equal to a second preset value n2, it is determined that the electronic expansion valve is medium, a prompt is issued, and the user selects to repair or continue to use the electronic expansion valve;

[0065] When the cumulative step loss number is greater than the second preset value n2, it is determined that the electronic expansion valve is poor, and the electronic expansion valve is reminded to be repaired or replaced.

[0066] When it is determined to be excellent, no after-sales processing is needed, and it is continued to be maintained.

[0067] When it is determined to be medium, there is a problem but it does not affect the use temporarily, there is a security risk, feedback is given to the after-sales, the after-sales contacts the customer to choose a time to repair and process.

[0068] When it is determined to be poor, it affects normal use, there is a security risk, and the after-sales must immediately repair or replace.

[0069] Embodiment 2 of the application provides a preferred embodiment of a normal operation method of an electronic expansion valve, wherein, as shown in the figure, Figure 3 The electronic expansion valve has five pins, wherein, the pins 1-4 are connection ends of internal step motor drive windings of the electronic expansion valve, which are connected to a waveform detection module, and the pin 5 is connected with a 12V power supply.

[0070] The waveform detection module comprises a signal acquisition module, a processing analysis module, a storage module and an output module.

[0071] The normal operation method comprises the following steps:

[0072] Step S210, during the starting process of the air conditioner, the electronic expansion valve is normally reset and runs;

[0073] Step S220, after the electronic expansion valve is normally reset, the one-way action is performed according to the instruction of the main control program, the signal acquisition module of the waveform detection module acquires the peak value of the voltage waveform of the pin 1-4 in real time, when the peak value of the voltage waveform corresponding to any pin jumps, that is, the peak value changes, the starting time of the peak value change is recorded;

[0074] In this embodiment, as shown in Figure 2 , the high level 12V voltage is defined as 1, the low level 0V voltage is defined as 0, the peak value of the voltage waveform corresponding to the pin 2 at the time T0 jumps, the starting time T 起始k of the peak value change is recorded, the peak value data corresponding to the time T 起始k is 0110, the peak value of the voltage waveform of the pin 1-4 is acquired in real time, the peak value data acquired at the time T 起始k+1 is 0100, it is indicated that the peak value of the voltage waveform corresponding to the pin 3 jumps, the starting time T 起始k+1 of the peak value change is recorded, the peak value of the voltage waveform of the pin 1-4 is acquired in real time, the peak value data corresponding to the time T 起始k+2 is 1100, it is indicated that the peak value of the voltage waveform corresponding to the pin 1 jumps, the starting time T 起始k+2 of the peak value change is recorded, the peak value of the voltage waveform of the pin 1-4 is acquired in real time, the peak value data corresponding to the time T 起始k+3 is 1000, it is indicated that the peak value of the voltage waveform corresponding to the pin 2 jumps, the starting time T 起始k+3 of the peak value change is recorded, and the above operation is repeated in turn.

[0075] Step S230, the difference between the starting times of two adjacent peak value changes is calculated to obtain the excitation time;

[0076] In this embodiment, as shown in Figure 2 , T 起始k+1 -T 起始k =T 差值k , T 起始k+2 -T 起始k+1 =T 差值 k+1, T 起始k+3 -T 起始k+2 =T 差值k+2 , and T 差值k , T 差值k+1 and T 差值k+2 are the corresponding excitation times.

[0077] Step S240, whether the electronic expansion valve is out of step is analyzed according to the excitation time, and the cumulative out-of-step step number and the current direction are recorded;

[0078] If the magnetizing time is less than the first magnetizing time T min , or the difference is greater than the second magnetizing time T max , it is determined that the electronic expansion valve is out of step once, and the cumulative out-of-step step number and the current direction are recorded; otherwise, it is determined that the electronic expansion valve is not out of step. That is, the difference number outside [T min , T max ] is the out-of-step step number of the electronic expansion valve.

[0079] The T min and T max are determined according to the model, design mode and manufacturer of the specific device.

[0080] In step S250, after the electronic expansion valve completes the one-way action according to the instruction, the main control program acquires the cumulative out-of-step step number output by the output module, and if the cumulative out-of-step step number is 0, no subsequent operation is performed, and if the cumulative out-of-step step number is not 0, the cumulative out-of-step step number is continued to run in the current direction, and the cumulative out-of-step step number is reset.

[0081] Embodiment 3 of the present application provides an electronic expansion valve normal operation system, comprising:

[0082] A signal acquisition module is configured to acquire the peak value of the running waveform of the electronic expansion valve in real time.

[0083] A processing and analysis module is configured to calculate the difference of the start time of the change of the adjacent two peak values to obtain the magnetizing time, and determine whether the electronic expansion valve is out of step according to the magnetizing time.

[0084] A storage module is configured to store the start time of the change of the peak value, and record the cumulative out-of-step step number and the current direction.

[0085] An output module is configured to output the cumulative out-of-step step number and the current direction to the main control program.

[0086] A main control program is configured to control the electronic expansion valve to continue to run the cumulative out-of-step step number in the current direction after the electronic expansion valve completes the one-way action according to the instruction, and reset the cumulative out-of-step step number.

[0087] The main control program can also acquire the cumulative out-of-step step number of the storage module, and determine the relationship between the cumulative out-of-step step number and the first preset value n1, the second preset value n2 and the third preset value n3 to determine the grade of the electronic expansion valve.

[0088] Embodiment 4 of the present application provides an air conditioner comprising the above-mentioned electronic expansion valve normal operation system.

[0089] Embodiment 5 of the present application provides a storage medium, which stores a computer program, and the program is executed by a processor to realize the electronic expansion valve normal operation method disclosed by the present application.

[0090] Storage media can be any available media that can be accessed by a computing device. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other storage medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computing device. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, or twisted pair, then the coaxial cable, fiber optic cable, or twisted pair are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), and Blu-Ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0091] In other embodiments, the computing device 100 receives the computer- readable program instructions from a storage medium such as a floppy disk, a USB drive, a CD-ROM, a DVD-ROM, or a memory card, among others. In other embodiments, the computer-readable program instructions are received from a storage medium that is internal or external to the computing device 100. In yet other embodiments, the computer-readable program instructions are received from a storage medium that is internal or external to the computing device 100. In yet other embodiments, the computer-readable program instructions are received from a storage medium that is internal or external to the computing device 100. In yet other embodiments, the computer-readable program instructions are received from a program cartridge, a removable memory stick, or an attached expansion card 1020 via, for example, the input / output interface 1030 or the transceiver 1050.

[0092] Computer readable program instructions for carrying out operations of the present disclosure can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state-setting data, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++ or the like, and conventional procedural programming languages such as the "C" programming language or similar programming languages. The computer readable program instructions can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider). In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate arrays (FPGA), or programmable logic arrays (PLA) can execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present disclosure.

[0093] Finally, it should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced, and any modification or replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A method for the normal operation of an electronic expansion valve, characterized in that, Includes the following steps: During the air conditioner startup process, the electronic expansion valve resets and operates normally; After the electronic expansion valve is reset normally, it performs unidirectional action according to the command and acquires the peak value of the operating waveform of the electronic expansion valve in real time. When the peak value changes, the start time of the peak value change is recorded. The excitation time is obtained by calculating the difference in the start time of the changes of two adjacent peak values. Analyze whether the electronic expansion valve has lost steps based on the excitation time, and record the cumulative number of lost steps and the current direction; After the electronic expansion valve completes its unidirectional action according to the command, it continues to move in the current direction, accumulating the number of lost steps, and then resets the number of lost steps.

2. The method for normal operation of the electronic expansion valve according to claim 1, characterized in that: The process of analyzing whether the electronic expansion valve has lost synchronization based on the excitation time, and recording the cumulative number of lost steps and the current direction, specifically includes: If the excitation time is greater than or equal to the first excitation time and less than or equal to the second excitation time, the electronic expansion valve is determined not to have lost step; otherwise, the electronic expansion valve is determined to have lost step once, and the cumulative number of lost steps and the current direction are recorded.

3. The method for normal operation of the electronic expansion valve according to any one of claims 1-2, characterized in that, The method further includes: An air conditioner status check is performed at interval t. If the air conditioner is on, it continues to run; if it is off, a health check is performed on the electronic expansion valve.

4. The method for normal operation of the electronic expansion valve according to claim 3, characterized in that: The health check includes the following steps: The electronic expansion valve has reset normally. The electronic expansion valve moves to the maximum position. During this process, the cumulative number of steps lost is recorded. When the maximum position is reached, the cumulative number of steps lost is reset. The electronic expansion valve moves to the minimum position. During this process, the cumulative number of steps lost is recorded. When the minimum position is reached, the cumulative number of steps lost is reset.

5. The method for normal operation of the electronic expansion valve according to claim 4, characterized in that: If the cumulative number of lost steps is less than or equal to the first preset value, the electronic expansion valve is judged to be of excellent quality and can continue to be used. When the cumulative number of lost steps is greater than the first preset value and less than or equal to the second preset value, the electronic expansion valve is determined to be in a medium condition, and a prompt is issued, allowing the user to choose to repair or continue using the electronic expansion valve. If the cumulative number of lost steps exceeds the second preset value, the electronic expansion valve is determined to be in poor condition, prompting a reminder to repair or replace the electronic expansion valve.

6. An electronic expansion valve normal operation system for implementing the method according to any one of claims 1-5, characterized in that, The system includes: The signal acquisition module is used to acquire the peak value of the operating waveform of the electronic expansion valve in real time. The processing and analysis module is used to calculate the difference in the start time of the change of two adjacent peak values, obtain the excitation time, and determine whether the electronic expansion valve has lost synchronization based on the excitation time. The storage module is used to record the start time of peak value changes, as well as the cumulative number of lost steps and the current direction; The output module is used to output the cumulative number of lost steps and the current direction to the main control program; The main control program is used to control the electronic expansion valve to continue running in the current direction after completing the unidirectional action according to the instruction, and to reset the accumulated number of lost steps.

7. An air conditioner, characterized in that, include: The electronic expansion valve normal operation system as described in claim 6.

8. A storage medium, characterized in that: The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the normal operation method of the electronic expansion valve as described in any one of claims 1-5.

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