Method and device for controlling an expansion valve of an air conditioner, air conditioner and storage medium

Abstract

The application relates to the technical field of air conditioners, and discloses a method and device for controlling an air conditioner expansion valve, an air conditioner and a storage medium. The method comprises the following steps: acquiring a current air outlet temperature and a current expansion valve opening degree of an air conditioner in a stable running state of a current running mode; in the case that the current air outlet temperature satisfies a first set condition, adjusting the current expansion valve opening degree for testing, obtaining a test air outlet temperature corresponding to the air conditioner, and determining a current adjustment direction of the air conditioner expansion valve according to the test air outlet temperature and the current running mode, wherein the first set condition is determined according to the current running mode and a target air outlet temperature; and controlling the air conditioner expansion valve to run in an adjustment state according to the current adjustment direction and the current expansion valve opening degree. In this way, the control of the air conditioner expansion valve is more accurate, and the performance of the air conditioner is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, for example, to a method and device for controlling an air conditioner expansion valve, an air conditioner and a storage medium. BACKGROUND

[0002] With the popularization of intelligent technology, intelligent air conditioners have become indispensable devices in home life. At present, the design process of an air conditioner cannot completely simulate the user's use environment, and therefore, the best operating parameters cannot be formulated for each working condition.

[0003] In the running process of the air conditioner, the operating parameters of the electronic expansion valve can adopt control schemes such as suction superheat control and compressor suction pressure control. In the process of controlling the valve opening degree through suction superheat or suction pressure, there is a certain adjustable range margin for different air conditioners. Therefore, under the condition of meeting the current use requirements of the air conditioner, the valve opening degree parameter of the air conditioner expansion valve can be further optimized, thereby improving the performance and use effect of the air conditioner.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an overall description of the application, nor is it intended to determine key / important elements or delineate the scope of these embodiments, but as a prelude to the detailed description below.

[0006] The embodiments of the present disclosure provide a method and device for controlling an air conditioner expansion valve, an air conditioner and a storage medium, to solve the technical problem that the performance of the air conditioner needs to be improved.

[0007] In some embodiments, the method comprises:

[0008] obtaining a current outlet air temperature and a current expansion valve opening degree of an air conditioner in a stable running state of a current running mode;

[0009] adjusting the current expansion valve opening degree for testing in the case where the current outlet air temperature meets a first set condition, obtaining a test outlet air temperature of the air conditioner corresponding to the adjustment, and determining a current adjustment direction of the air conditioner expansion valve according to the test outlet air temperature and the current running mode, wherein the first set condition is determined according to the current running mode and a target outlet air temperature;

[0010] controlling the air conditioner expansion valve to run in an adjustment state according to the current adjustment direction and the current expansion valve opening degree.

[0011] In some embodiments, the device comprises:

[0012] a first obtaining module configured to obtain a current outlet air temperature and a current expansion valve opening degree of an air conditioner in a stable running state of a current running mode;

[0013] a direction determining module configured to, in a case where the current outlet air temperature satisfies a first set condition, adjust the current expansion valve opening degree for testing, obtain a corresponding test outlet air temperature of the air conditioner, and determine a current adjustment direction of the expansion valve of the air conditioner according to the test outlet air temperature and the current running mode, wherein the first set condition is determined according to the current running mode and a target outlet air temperature;

[0014] a first adjusting module configured to control the expansion valve of the air conditioner to run in an adjusted state according to the current adjustment direction and the current expansion valve opening degree.

[0015] In some embodiments, the device for controlling the expansion valve of the air conditioner comprises a processor and a memory storing program instructions, and the processor is configured to execute the program instructions to perform the method for controlling the expansion valve of the air conditioner.

[0016] In some embodiments, the air conditioner comprises an air conditioner body, and the device for controlling the expansion valve of the air conditioner is installed on the air conditioner body.

[0017] In some embodiments, the storage medium stores program instructions, and the program instructions are executed to perform the method for controlling the expansion valve of the air conditioner.

[0018] The method, device and air conditioner for controlling the expansion valve of the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0019] After the air conditioner runs in a stable state, the expansion valve opening degree is tested, and the adjustment direction of the expansion valve of the air conditioner is determined according to the test outlet air temperature of the air conditioner, and then the valve opening degree of the expansion valve of the air conditioner is adjusted, which can make the control of the expansion valve of the air conditioner more accurate, and thus the running parameters of the air conditioner can better meet the needs of the use environment, and the performance of the air conditioner is improved.

[0020] The foregoing general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute a limitation on the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, the drawings do not constitute a proportional limitation, and wherein:

[0022] Figure 1 is a flowchart of a method for controlling an expansion valve of an air conditioner according to an embodiment of the present disclosure;

[0023] Figure 2 is a flowchart of a method for controlling an expansion valve of an air conditioner according to an embodiment of the present disclosure;

[0024] Figure 3 is a flowchart of a method for controlling an expansion valve of an air conditioner according to an embodiment of the present disclosure;

[0025] Figure 4 is a structural diagram of a device for controlling an expansion valve of an air conditioner according to an embodiment of the present disclosure;

[0026] Figure 5 is a structural diagram of a device for controlling an expansion valve of an air conditioner according to an embodiment of the present disclosure;

[0027] Figure 6 is a structural diagram of a device for controlling an expansion valve of an air conditioner according to an embodiment of the present disclosure;

[0028] Figure 7 is a schematic diagram of an air conditioner according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0030] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0031] Unless otherwise specified, the term "a plurality of" means two or more.

[0032] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B means A or B.

[0033] The term "and / or", which is an associative relationship between objects, means that there can be three relationships. For example, A and / or B means that there are three relationships of A or B, or A and B.

[0034] In the embodiments of the present disclosure, after the air conditioner is stably running, the expansion valve of the air conditioner is adjusted and tested when the outlet air temperature meets the first set condition, and the corresponding test outlet air temperature is obtained. Therefore, according to the running mode of the air conditioner, the test outlet air temperature is determined, the adjustment direction of the expansion valve of the air conditioner is determined, and then the valve opening degree of the expansion valve of the air conditioner is adjusted, which can make the control of the expansion valve of the air conditioner more accurate, and the running parameters of the air conditioner can better meet the needs of the use environment, thereby improving the performance of the air conditioner. In some embodiments, the valve opening degree of the expansion valve of the air conditioner can be adjusted according to the adjustment direction multiple times until the corresponding adjusted outlet air temperature meets the second set condition, so that the valve opening degree of the expansion valve of the air conditioner is at the optimal valve opening degree, and the control accuracy of the expansion valve of the air conditioner and the performance of the air conditioner are further improved.

[0035] Figure 1 is a flowchart of an air conditioner expansion valve control method provided by the embodiments of the present disclosure. As shown in Figure 1 , the process of air conditioner expansion valve control includes:

[0036] Step 101: Obtain the current outlet air temperature and the current expansion valve opening degree of the air conditioner in the stable running state of the current running mode.

[0037] The air conditioner is started and runs in the current running mode, and after a period of time, it is in a stable running state, that is, at this time, the running frequency of the air conditioner compressor, the running speed of the fan, the opening degree of the electronic valve expansion valve and other parameters remain basically unchanged. In the embodiments of the present disclosure, the running mode includes: a refrigeration mode, a heating mode and the like, so that the current running mode is a refrigeration mode or a heating mode.

[0038] By configuring the detection device, the outlet air temperature of the air conditioner outlet in the stable running state and the expansion valve opening degree can be obtained, and the current outlet air temperature and the current expansion valve opening degree corresponding to the current time are obtained.

[0039] Step 102: Adjust the current expansion valve opening degree for testing when the current outlet air temperature meets the first set condition, obtain the test outlet air temperature of the air conditioner corresponding to the test, and determine the current adjustment direction of the expansion valve of the air conditioner according to the test outlet air temperature and the current running mode, wherein the first set condition is determined according to the current running mode and the target outlet air temperature.

[0040] In the embodiments of the present disclosure, the first set condition can be determined according to the current operation mode and the target outlet air temperature. In a case where the current operation mode is the cooling mode, the first set condition can be greater than or equal to the target outlet air temperature. In a case where the current operation mode is the heating mode, the first set condition can be less than or equal to the target outlet air temperature.

[0041] Therefore, if the current operation mode is the cooling mode and the current outlet air temperature Tc obtained is greater than or equal to the target outlet air temperature T, it indicates that the air conditioning expansion valve still has further adjustment space, and thus the adjustment test on the air conditioning expansion valve can be performed to determine the adjustment direction of the air conditioning expansion valve. If the current operation mode is the heating mode and the current outlet air temperature Tc obtained is less than or equal to the target outlet air temperature T, it indicates that the air conditioning expansion valve still has further adjustment space, and thus the adjustment test on the air conditioning expansion valve can also be performed to determine the adjustment direction of the air conditioning expansion valve.

[0042] In some embodiments, the adjustment test on the air conditioning expansion valve, that is, the test on the adjustment of the current expansion valve opening degree, can include: increasing the current expansion valve opening degree by a set value to obtain an increased test expansion valve opening degree, and determining the outlet air temperature obtained after the operation according to the increased test expansion valve opening degree as an increased test outlet air temperature; and decreasing the current expansion valve opening degree by a set value to obtain a decreased test expansion valve opening degree, and determining the outlet air temperature obtained after the operation according to the decreased test expansion valve opening degree as a decreased test outlet air temperature.

[0043] The set value can be 3, 5, 8 or 10, etc., which can be determined according to the model of the air conditioner and the application scenario. For example, if the current expansion valve opening degree is A, the current expansion valve opening degree can be first increased, that is, the increased test expansion valve opening degree Ad=A+5, and at this time, the outlet air temperature of the corresponding air conditioner is the increased test outlet air temperature Td. Then, the current expansion valve opening degree is decreased, that is, the decreased test expansion valve opening degree Ax=A-5, and at this time, the outlet air temperature of the corresponding air conditioner is the decreased test outlet air temperature Tx.

[0044] After the adjustment test on the air conditioning expansion valve, the adjustment direction of the air conditioner can be determined according to the corresponding test outlet air temperature and the current operation mode. In some embodiments, determining the current adjustment direction of the air conditioning expansion valve includes: in a case where the current operation mode is the cooling mode, determining the adjustment direction corresponding to the smaller one of the increased test outlet air temperature and the decreased test outlet air temperature as the current adjustment direction; and in a case where the current operation mode is the heating mode, determining the adjustment direction corresponding to the larger one of the increased test outlet air temperature and the decreased test outlet air temperature as the current adjustment direction.

[0045] For example, the test up air outlet temperature Td and the test down air outlet temperature Tx are compared, and when the current operation mode is the cooling mode, if Td < Tx, the up corresponding to Td is determined as the current adjustment direction, or Tx < Td, the down corresponding to Tx is determined as the current adjustment direction. When the current operation mode is the heating mode, if Tx < Td, the up corresponding to Td is determined as the current adjustment direction, or Td < Tx, the down corresponding to Tx is determined as the current adjustment direction.

[0046] Step 103: According to the current adjustment direction and the current expansion valve opening degree, the air conditioner expansion valve is controlled to run in the adjustment state.

[0047] In some embodiments, according to the current expansion valve opening degree, the current adjustment direction and the set value, a first adjusted expansion valve opening degree is obtained; and according to the first adjusted expansion valve opening degree, the air conditioner expansion valve is controlled to run.

[0048] For example, if the current adjustment direction is up, the current expansion valve opening degree is A, and the set value is 3, the first adjusted expansion valve opening degree A1 = A + 3. If the current adjustment direction is down, the current expansion valve opening degree is A, and the set value is 3, the first adjusted expansion valve opening degree A1 = A - 3. Then, according to the first adjusted expansion valve opening degree, the air conditioner expansion valve is controlled to run.

[0049] It can be seen that in the embodiments of the present disclosure, after the air conditioner runs in the stable state, the expansion valve opening degree is tested, and the adjustment direction of the air conditioner expansion valve is determined according to the corresponding test air outlet temperature of the air conditioner, and then the valve opening degree of the air conditioner expansion valve is adjusted, so that the control of the air conditioner expansion valve is more accurate, and the running parameters of the air conditioner can better meet the needs of the use environment, thereby improving the performance of the air conditioner

[0050] Of course, in the embodiments of the present disclosure, the air conditioner expansion valve opening degree can be adjusted once, twice or multiple times according to the current adjustment direction until the best expansion valve opening degree is reached. Therefore, the air conditioner expansion valve is controlled to run in the adjustment state also includes: obtaining the air outlet temperature of the air conditioner after each adjustment of the air conditioner expansion valve, saving as the nth air outlet temperature carrying adjustment number information, and saving the nth expansion valve opening degree corresponding to the nth air outlet temperature, wherein n is an integer greater than 0; according to the nth expansion valve opening degree, the current adjustment direction and the set value, the air conditioner expansion valve is continuously controlled to run in the adjustment state until the nth air outlet temperature meets the second set condition, wherein the second set condition is determined according to the target air outlet temperature, the nth air outlet temperature and the (n-1)th air outlet temperature.

[0051] For example, the air conditioner outlet temperature after the first adjustment of the air conditioner expansion valve is obtained, and the first outlet temperature T1 carrying adjustment number information is saved, and the air conditioner outlet temperature after the n th adjustment of the air conditioner expansion valve is saved as the n th outlet temperature Tn carrying adjustment number information. n is an integer greater than 0. When n = 1, n-1 = 0, so according to step 101, the 0 th outlet temperature T0 = Tc can be determined.

[0052] Similarly, the second set condition matches the operation mode of the air conditioner, and also matches the outlet temperatures after two adjacent adjustments. If the current operation mode is the cooling mode, the second set condition is that the n th outlet temperature Tn after the n th adjustment is greater than or equal to the n-1 th outlet temperature Tn-1 after the n-1 th adjustment, and the n-1 th outlet temperature is greater than or equal to the target outlet temperature T. If the current operation mode is the heating mode, the second set condition is that the n th outlet temperature Tn after the n th adjustment is less than or equal to the n-1 th outlet temperature Tn-1 after the n-1 th adjustment, and the n-1 th outlet temperature is less than or equal to the target outlet temperature T.

[0053] Therefore, in some embodiments, continuing to control the air conditioner expansion valve to operate in the adjustment state includes: in the case where the n th outlet temperature does not satisfy the second set condition, obtaining the n+1 th expansion valve opening degree according to the n th expansion valve opening degree, the current adjustment direction, and the set value, and adjusting the air conditioner expansion valve and controlling the air conditioner expansion valve to operate in the adjustment state according to the n+1 th expansion valve opening degree; in the case where the n th outlet temperature satisfies the second set condition, determining the n-1 th expansion valve opening degree corresponding to the n-1 th outlet temperature as the optimal expansion valve opening degree, and adjusting the air conditioner expansion valve and controlling the air conditioner expansion valve to operate in the stable state according to the optimal expansion valve opening degree.

[0054] When the air conditioner is in cooling operation, the n-th outlet air temperature Tn is obtained after the n-th adjustment of the air conditioner expansion valve. If Tn < T or Tn < Tn-1, it indicates that the second set condition is not met, and the air conditioner expansion valve is still adjusted, i.e. the n+1-th adjustment of the air conditioner expansion valve is performed according to the n-th expansion valve opening degree, the current adjustment direction and the set value. For example, if the current adjustment direction is to increase, An+1 = An+3, and the n+1-th adjustment of the air conditioner expansion valve is performed according to An+1. If T ≤ Tn-1 ≤ Tn, it indicates that the n-th outlet air temperature meets the second set condition, and the n-1-th expansion valve opening degree corresponding to the n-1-th outlet air temperature is determined as the optimal expansion valve opening degree, and the air conditioner expansion valve is adjusted and controlled to be in stable operation according to the optimal expansion valve opening degree. For example, An-1 is determined as the optimal expansion valve opening degree, and the air conditioner expansion valve is adjusted and controlled to be in stable operation according to the optimal expansion valve opening degree, i.e. the expansion valve is not adjusted any more, and the air conditioner is in stable operation. Of course, after the air conditioner is in stable operation, the expansion valve opening degree can be continuously monitored according to the outlet air temperature.

[0055] When the air conditioner is in heating operation, the n-th outlet air temperature Tn is obtained after the n-th adjustment of the air conditioner expansion valve. If T < Tn or Tn-1 < Tn, it indicates that the second set condition is not met, and the air conditioner expansion valve is still adjusted, i.e. the n+1-th adjustment of the air conditioner expansion valve is performed according to the n-th expansion valve opening degree, the current adjustment direction and the set value. For example, if the current adjustment direction is to decrease, An+1 = An-3, and the n+1-th adjustment of the air conditioner expansion valve is performed according to An+1. If Tn ≤ Tn-1 ≤ T, it indicates that the n-th outlet air temperature meets the second set condition, and the n-1-th expansion valve opening degree corresponding to the n-1-th outlet air temperature is determined as the optimal expansion valve opening degree, and the air conditioner expansion valve is adjusted and controlled to be in stable operation according to the optimal expansion valve opening degree. For example, An-1 is determined as the optimal expansion valve opening degree, and the air conditioner expansion valve is adjusted and controlled to be in stable operation according to the optimal expansion valve opening degree, i.e. the expansion valve is not adjusted any more, and the air conditioner is in stable operation. Of course, after the air conditioner is in stable operation, the expansion valve opening degree can be continuously monitored according to the outlet air temperature.

[0056] In this way, the valve opening degree of the air conditioner expansion valve can be adjusted according to the adjustment direction for multiple times until the optimal expansion valve opening degree is reached, and the control precision of the air conditioner expansion valve and the performance of the air conditioner are further improved.

[0057] The operation process is combined into the following specific embodiments to illustrate the air conditioner expansion valve control process provided by the embodiments of the present application.

[0058] In an embodiment of the present disclosure, when the air conditioner is in a refrigeration operation, the first set condition can be greater than or equal to the target outlet air temperature, and the set value can be 5.

[0059] Figure 2 is a flowchart of a method for controlling an expansion valve of an air conditioner provided by an embodiment of the present disclosure. In combination with the method for controlling an expansion valve of an air conditioner provided by an embodiment of the present disclosure, the process of controlling the expansion valve of the air conditioner includes the following steps. Figure 2

[0060] Step 201: Obtain the current outlet air temperature and the current expansion valve opening degree of the air conditioner in a stable refrigeration operation.

[0061] The current outlet air temperature and the current expansion valve opening degree of the air conditioner in a stable refrigeration operation can be obtained in a time manner, that is, the current outlet air temperature and the current expansion valve opening degree of the air conditioner in a stable refrigeration operation are obtained when a set time is reached.

[0062] Step 202: Is the current outlet air temperature Tc greater than or equal to the target outlet air temperature T? If yes, execute step 203, otherwise, the current process ends.

[0063] Step 203: Increase the current expansion valve opening degree A by 5 to obtain an increased test expansion valve opening degree, and run according to the increased test expansion valve opening degree to obtain an increased test outlet air temperature Td.

[0064] Step 204: Decrease the current expansion valve opening degree A by 5 to obtain a decreased test expansion valve opening degree, and run according to the decreased test expansion valve opening degree to obtain a decreased test outlet air temperature Tx.

[0065] The order of step 203 and step 204 is not limited.

[0066] Step 205: Determine the direction corresponding to the smaller value of the increased test outlet air temperature Td and the decreased test outlet air temperature Tx as the current adjustment direction of the expansion valve of the air conditioner.

[0067] If Td < Tx, the increase corresponding to Td is determined as the current adjustment direction; if Tx < Td, the decrease corresponding to Tx is determined as the current adjustment direction.

[0068] Step 206: Obtain a first adjusted expansion valve opening degree according to the current expansion valve opening degree, the current adjustment direction, and the set value, and control the expansion valve of the air conditioner to run according to the first adjusted expansion valve opening degree.

[0069] Step 207: Obtain the outlet air temperature of the air conditioner after each adjustment of the expansion valve of the air conditioner, save it as the nth outlet air temperature Tn carrying adjustment number information, and save the nth expansion valve opening degree An corresponding to the nth outlet air temperature.

[0070] ​Step 208: judge whether T≤Tn-1≤Tn is true? If yes, execute step 209, otherwise, execute step 210.

[0071] Wherein, when n=1, Tn-1 can be Tc described above.

[0072] Step 209: determine the n-1th expansion valve opening corresponding to the n-1th air outlet temperature as the optimal expansion valve opening, and adjust the air conditioning expansion valve and control the air conditioning expansion valve to operate in a stable state according to the optimal expansion valve opening. This process ends.

[0073] Step 210: obtain the n+1th expansion valve opening An+1 according to the nth expansion valve opening An, the current adjustment direction, and the set value; and control the air conditioning expansion valve to operate in an adjustment state according to the n+1th expansion valve opening, and return to step 207.

[0074] It can be seen that in the embodiment, when the air conditioner is in cooling operation, the valve opening of the air conditioning expansion valve can be adjusted continuously and multiple times according to the air outlet temperature until the current air outlet temperature is greater than or equal to the previous air outlet temperature, and the previous air outlet temperature is greater than or equal to the target air outlet temperature, that is, the valve opening of the air conditioning expansion valve is adjusted to the optimal expansion valve opening. In this way, the air conditioner is in a better cooling operation state, and the operation parameters of the air conditioner can better meet the needs of the use environment, thereby improving the control precision of the air conditioning expansion valve and the performance of the air conditioner.

[0075] In an embodiment of the present disclosure, when the air conditioner is in heating operation, the first set condition can be less than or equal to the target air outlet temperature, and the set value can be 5.

[0076] Figure 3 is a flowchart of an air conditioning expansion valve control method provided by an embodiment of the present disclosure. In combination with Figure 3 , the air conditioning expansion valve control process includes:

[0077] Step 301: obtain the current air outlet temperature and the current expansion valve opening of the air conditioner in a stable heating operation state.

[0078] The current air outlet temperature and the current expansion valve opening of the air conditioner in a stable heating operation state can be obtained at a set time, that is, when the set time is reached, the current air outlet temperature and the current expansion valve opening of the air conditioner in a stable heating operation state are obtained.

[0079] Step 302: whether the current air outlet temperature Tc is less than or equal to the target air outlet temperature T? If yes, execute step 303, otherwise, this process ends.

[0080] Step 303: obtain a larger test expansion valve opening by adding 5 to the current expansion valve opening A, and obtain a larger test air outlet temperature Td according to the larger test expansion valve opening.

[0081] Step 304: obtaining a reduced test expansion valve opening degree A-5 by reducing the current expansion valve opening degree A-4, and running according to the reduced test expansion valve opening degree A-5 to obtain a reduced test outlet air temperature Tx.

[0082] The order of steps 303 and 304 is not limited.

[0083] Step 305: determining the direction corresponding to the larger one of the increased test outlet air temperature Td and the reduced test outlet air temperature Tx as the current adjustment direction of the air conditioner expansion valve.

[0084] If Td>Tx, the increased direction corresponding to Td is determined as the current adjustment direction; if Tx>Td, the reduced direction corresponding to Tx is determined as the current adjustment direction.

[0085] Step 306: obtaining a first adjusted expansion valve opening degree according to the current expansion valve opening degree, the current adjustment direction, and the set value; and controlling the air conditioner expansion valve to run according to the first adjusted expansion valve opening degree.

[0086] Step 307: obtaining the outlet air temperature of the air conditioner after each adjustment of the air conditioner expansion valve, saving as the nth outlet air temperature Tn carrying adjustment number information, and saving the nth expansion valve opening degree An corresponding to the nth outlet air temperature.

[0087] Step 308: determining whether Tn≤Tn-1≤T is true? If yes, executing step 309, otherwise, executing step 310.

[0088] Wherein, when n=1, Tn-1 can be the above-mentioned Tc.

[0089] Step 309: determining the (n-1)th expansion valve opening degree corresponding to the (n-1)th outlet air temperature as the optimal expansion valve opening degree, and adjusting the air conditioner expansion valve according to the optimal expansion valve opening degree and controlling the air conditioner expansion valve to run in a stable state. This process ends.

[0090] Step 310: obtaining the (n+1)th expansion valve opening degree An+1 according to the nth expansion valve opening degree An, the current adjustment direction, and the set value; and controlling the air conditioner expansion valve to run in an adjustment state according to the (n+1)th expansion valve opening degree, and returning to step 307.

[0091] It can be seen that in the embodiment, when the air conditioner runs in heating mode, the valve opening degree of the air conditioner expansion valve can be adjusted continuously and multiple times according to the outlet air temperature, until the current outlet air temperature is less than or equal to the previous outlet air temperature, and the previous outlet air temperature is less than or equal to the target outlet air temperature, i.e. the valve opening degree of the air conditioner expansion valve is adjusted to the optimal expansion valve opening degree, so that the air conditioner runs in a better heating mode, and the running parameters of the air conditioner can better meet the needs of the use environment, thereby improving the control precision of the air conditioner expansion valve and the performance of the air conditioner.

[0092] According to the process for controlling the expansion valve of the air conditioner, an apparatus for controlling the expansion valve of the air conditioner can be constructed.

[0093] Figure 4 is a structural schematic diagram of an apparatus for controlling the expansion valve of the air conditioner provided by an embodiment of the present disclosure. As shown in Figure 4 The apparatus 400 for controlling the expansion valve of the air conditioner includes a first obtaining module 410, a direction determining module 420, and a first adjusting module 430.

[0094] The first obtaining module 410 is configured to obtain a current outlet air temperature and a current expansion valve opening degree of the air conditioner in a stable running state of a current running mode.

[0095] The direction determining module 420 is configured to, in a case where the current outlet air temperature satisfies a first set condition, adjust the current expansion valve opening degree for testing, obtain a corresponding test outlet air temperature of the air conditioner, and determine a current adjusting direction of the expansion valve of the air conditioner according to the test outlet air temperature and the current running mode, wherein the first set condition is determined according to the current running mode and a target outlet air temperature.

[0096] The first adjusting module 430 is configured to control the expansion valve of the air conditioner to run in an adjusting state according to the current adjusting direction and the current expansion valve opening degree.

[0097] In some embodiments, the direction determining module 420 includes a first testing unit and a second testing unit.

[0098] The first testing unit is configured to increase the current expansion valve opening degree by a set value to obtain an increased testing expansion valve opening degree, and determine an increased testing outlet air temperature as the outlet air temperature obtained after running according to the increased testing expansion valve opening degree.

[0099] The second testing unit is configured to decrease the current expansion valve opening degree by the set value to obtain a decreased testing expansion valve opening degree, and determine a decreased testing outlet air temperature as the outlet air temperature obtained after running according to the decreased testing expansion valve opening degree.

[0100] In some embodiments, the direction determining module 420 further includes a direction determining unit configured to, in a case where the current running mode is a cooling mode, determine the smaller one of the increased testing outlet air temperature and the decreased testing outlet air temperature as the corresponding adjusting direction of the current adjusting direction; and in a case where the current running mode is a heating mode, determine the larger one of the increased testing outlet air temperature and the decreased testing outlet air temperature as the corresponding adjusting direction of the current adjusting direction.

[0101] In some embodiments, the first adjusting module 430 is specifically configured to obtain a first adjusted expansion valve opening degree according to the current expansion valve opening degree, the current adjusting direction, and the set value; and control the air conditioning expansion valve to operate according to the first adjusted expansion valve opening degree.

[0102] In some embodiments, the air conditioning expansion valve control device further comprises:

[0103] The second obtaining module is configured to obtain an air outlet temperature of the air conditioner after each adjustment of the air conditioning expansion valve, save the air outlet temperature as an nth air outlet temperature carrying adjustment number information, and save an nth expansion valve opening degree corresponding to the nth air outlet temperature, wherein n is an integer greater than 0.

[0104] The second adjusting module is configured to continue to control the air conditioning expansion valve to operate in the adjusting state according to the nth expansion valve opening degree, the current adjusting direction, and the set value until the nth air outlet temperature satisfies a second set condition, wherein the second set condition is determined according to the target air outlet temperature, the nth air outlet temperature, and an (n-1)th air outlet temperature.

[0105] In some embodiments, the second adjusting module is specifically configured to, in a case where the nth air outlet temperature does not satisfy the second set condition, obtain an (n+1)th expansion valve opening degree according to the nth expansion valve opening degree, the current adjusting direction, and the set value, and adjust the air conditioning expansion valve and control the air conditioning expansion valve to operate in the adjusting state according to the (n+1)th expansion valve opening degree; and in a case where the nth air outlet temperature satisfies the second set condition, determine an (n-1)th expansion valve opening degree corresponding to the (n-1)th air outlet temperature as an optimal expansion valve opening degree, and adjust the air conditioning expansion valve and control the air conditioning expansion valve to operate in a stable state according to the optimal expansion valve opening degree.

[0106] The air conditioning expansion valve control process of the air conditioning expansion valve control device is further described below in combination with embodiments.

[0107] In this embodiment, the air conditioner is in a refrigeration operation, and thus the first set condition can be greater than or equal to the target air outlet temperature, and the set value can be 5.

[0108] Figure 5 FIG. 1 is a structural schematic diagram of an air conditioning expansion valve control device provided by an embodiment of the present disclosure. As shown in FIG. 1, the air conditioning expansion valve control device 100 comprises a first obtaining module 110, a direction determining module 120, a first adjusting module 130, a second obtaining module 140, and a second adjusting module 150, and the direction determining module 120 comprises a first test unit 121, a second test unit 122, and a direction determining unit 123. Figure 5

[0109] ​The first obtaining module 410 can obtain the current outlet air temperature and the current expansion valve opening degree of the air conditioner in the refrigeration stable running state. In the case of the current outlet air temperature Tc≥target outlet air temperature T, the first test unit 421 in the direction determining module 420 increases the current expansion valve opening degree A by 5 to obtain a larger test expansion valve opening degree, and runs according to the larger test expansion valve opening degree to obtain a larger test outlet air temperature Td. The second test unit 422 in the direction determining module 420 decreases the current expansion valve opening degree A by 5 to obtain a smaller test expansion valve opening degree, and runs according to the smaller test expansion valve opening degree to obtain a smaller test outlet air temperature Tx. Thus, the direction determining unit 423 can determine the direction corresponding to the smaller one of the larger test outlet air temperature Td and the smaller test outlet air temperature Tx as the current adjustment direction of the expansion valve of the air conditioner.

[0110] In this way, the first adjustment module 430 can obtain the first adjusted expansion valve opening degree according to the current expansion valve opening degree, the current adjustment direction, and the set value, and control the expansion valve of the air conditioner to run according to the first adjusted expansion valve opening degree.

[0111] Then, the second obtaining module 440 obtains the outlet air temperature of the air conditioner after each adjustment of the expansion valve of the air conditioner, saves it as the nth outlet air temperature Tn carrying adjustment number information, and saves the nth expansion valve opening degree An corresponding to the nth outlet air temperature. In the case of T≤Tn-1≤Tn, the second adjustment module 450 can determine the (n-1)th expansion valve opening degree corresponding to the (n-1)th outlet air temperature as the optimal expansion valve opening degree, and adjust and control the expansion valve of the air conditioner to run in a stable state according to the optimal expansion valve opening degree. Otherwise, the second adjustment module 450 obtains the (n+1)th expansion valve opening degree An+1 according to the nth expansion valve opening degree An, the current adjustment direction, and the set value, and controls the expansion valve of the air conditioner to run in an adjustment state according to the (n+1)th expansion valve opening degree. That is, the expansion valve of the air conditioner continues to run in an adjustment state until the nth outlet air temperature meets the second set condition.

[0112] It can be seen that, in the embodiment, after the air conditioner runs stably, the device for controlling the expansion valve of the air conditioner can continuously adjust the valve opening degree of the expansion valve of the air conditioner multiple times according to the outlet air temperature, until the current outlet air temperature is greater than or equal to the previous outlet air temperature, and the previous outlet air temperature is greater than or equal to the target outlet air temperature, that is, the valve opening degree of the expansion valve of the air conditioner is adjusted to the optimal expansion valve opening degree. In this way, the air conditioner runs in a better refrigeration state, and the running parameters of the air conditioner can better meet the needs of the use environment, thereby improving the control precision of the expansion valve of the air conditioner and the performance of the air conditioner.

[0113] In combination Figure 6 The device for controlling the expansion valve of the air conditioner 600 provided in the embodiment of the present disclosure comprises:

[0114] The processor 1000 and the memory 1001 can also include a communication interface 1002 and a bus 1003. The processor 1000, the communication interface 1002, and the memory 1001 can communicate with each other through the bus 1003. The communication interface 1002 can be used for information transmission. The processor 1000 can invoke the logic instructions in the memory 1001 to execute the method for controlling the expansion valve of the air conditioner in the above embodiments.

[0115] In addition, the logic instructions in the memory 1001 described above can be implemented in the form of a software functional unit and sold or used as an independent product, which can be stored in a computer readable storage medium.

[0116] The memory 1001 as a computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiments of the present disclosure. The processor 1000 executes the function application and data processing by running the program instructions / modules stored in the memory 1001, that is, implements the method for controlling the expansion valve of the air conditioner in the above method embodiments.

[0117] The memory 1001 can include a program storage area and a data storage area. The program storage area can store an operating system and at least one application required by a function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 1001 can include a high-speed random access memory, and can also include a non-volatile memory.

[0118] The embodiments of the present disclosure provide an air conditioner expansion valve control device, which includes a processor and a memory storing program instructions, and the processor is configured to execute the air conditioner expansion valve control method when executing the program instructions.

[0119] In combination Figure 7 , the embodiments of the present disclosure provide an air conditioner 700, which includes an air conditioner body and the above-mentioned air conditioner expansion valve control device 400 (600). The air conditioner expansion valve control device 400 (600) is installed on the air conditioner body. The installation relationship described herein is not limited to placing in the product, but also includes installation connection with other components of the product, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand that the air conditioner expansion valve control device 400 (600) can be adapted to a feasible air conditioner body, and thus other feasible embodiments can be realized.

[0120] The embodiment of the present disclosure provides a storage medium, which stores program instructions, and the program instructions perform the method for controlling the expansion valve of the air conditioner when executed.

[0121] The embodiment of the present disclosure provides a computer program product, which comprises a computer program stored on a storage medium, and the computer program comprises program instructions, and the program instructions make a computer execute the method for controlling the expansion valve of the air conditioner when executed.

[0122] The storage medium described above can be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

[0123] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes, or a transitory storage medium.

[0124] The above description and drawings are illustrative of embodiments of the present disclosure and are not intended to be limiting. Other embodiments can include structural, logical, electrical, process, and other changes. Embodiments are illustrative of the many possible variations that are readily undertaken. Individual components and functions are optional unless explicitly required, and the order of operations can be varied. Portions and features of some embodiments can be included in, or substituted for, those of other embodiments. The scope of the present disclosure encompasses the entire scope of the following claims, and all available equivalents of the claims. When used in this application, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without changing the meaning of the description, so 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 they are not necessarily the same element. Also, the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. In addition, the term "comprises / comprising" and / or "comprises / comprising" when used in this application is taken to mean, for either the singular or plural forms, the stated features, integers, steps, operations, elements, and / or components but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Without more limitations, an element preceded by "comprises a" does not, without more limitations, preclude the existence of additional identical elements in the process, method, article, or apparatus including the recited element. In this document, each embodiment is highlighted by the differences from other embodiments. Identical or similar parts between embodiments can be mutually referred to. For the method, product, etc. disclosed by the embodiments, if it corresponds to the method part disclosed by the embodiments, the relevant part can be referred to the description of the method part.

[0125] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to realize the described functions, but such implementation should not be considered beyond the scope of the embodiments of the present disclosure. The skilled person can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0126] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units can only be a logical function division, and actual implementation can have another division manner, for example, a plurality of 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 the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to implement the embodiments. In addition, each functional unit in the embodiments of the present disclosure can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit.

[0127] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

Claims

1. A method for controlling an air conditioning expansion valve, characterized by, The method comprises the following steps: obtaining a current outlet air temperature and a current expansion valve opening degree of an air conditioner in a stable running state of a current running mode; in a case where the current outlet air temperature satisfies a first set condition, adjusting the current expansion valve opening degree for testing, obtaining a corresponding test outlet air temperature of the air conditioner, and determining a current adjustment direction of the expansion valve of the air conditioner according to the test outlet air temperature and the current running mode, wherein, in a case where the current running mode is a cooling mode, the first set condition is greater than or equal to a target outlet air temperature; in a case where the current running mode is a heating mode, the first set condition is less than or equal to the target outlet air temperature; controlling the expansion valve of the air conditioner to run in an adjustment state according to the current adjustment direction and the current expansion valve opening degree; wherein, the obtaining of the corresponding test outlet air temperature of the air conditioner comprises: increasing the current expansion valve opening degree by a set value to obtain an increased test expansion valve opening degree, and determining an increased test outlet air temperature obtained after running according to the increased test expansion valve opening degree; decreasing the current expansion valve opening degree by the set value to obtain a decreased test expansion valve opening degree, and determining a decreased test outlet air temperature obtained after running according to the decreased test expansion valve opening degree; then, the determining of the current adjustment direction of the expansion valve of the air conditioner comprises: in a case where the current running mode is the cooling mode, determining the smaller one of the increased test outlet air temperature and the decreased test outlet air temperature as the current adjustment direction; in a case where the current running mode is the heating mode, determining the larger one of the increased test outlet air temperature and the decreased test outlet air temperature as the current adjustment direction.

2. The method of claim 1, wherein, the controlling of the expansion valve of the air conditioner to run in the adjustment state comprises: obtaining a first adjusted expansion valve opening degree according to the current expansion valve opening degree, the current adjustment direction, and a set value; controlling the expansion valve of the air conditioner to run according to the first adjusted expansion valve opening degree.

3. The method according to claim 1 or 2, characterized in that, the controlling of the expansion valve of the air conditioner to run in the adjustment state further comprises: obtaining an outlet air temperature of the air conditioner after each adjustment of the expansion valve of the air conditioner, saving the outlet air temperature as an nth outlet air temperature carrying adjustment number information, and saving an nth expansion valve opening degree corresponding to the nth outlet air temperature, wherein n is an integer greater than 0. According to the n-th expansion valve opening degree, the current adjustment direction, and the set value, the air conditioning expansion valve is continuously controlled to run in the adjustment state until the n-th outlet air temperature meets a second set condition, wherein, in the case of the current running mode being the cooling mode, the second set condition is that the n-th outlet air temperature after the n-th adjustment is greater than or equal to the (n-1)-th outlet air temperature after the (n-1)-th adjustment, and the (n-1)-th outlet air temperature is greater than or equal to the target outlet air temperature T, wherein, in the case of n=1, the 0-th outlet air temperature T0 is the current outlet air temperature; in the case of the current running mode being the heating mode, the second set condition is that the n-th outlet air temperature after the n-th adjustment is less than or equal to the (n-1)-th outlet air temperature after the (n-1)-th adjustment, and the (n-1)-th outlet air temperature is less than or equal to the target outlet air temperature T, wherein, in the case of n=1, the 0-th outlet air temperature T0 is the current outlet air temperature.

4. The method of claim 3, wherein, The continuous control of the air conditioning expansion valve in the adjustment state includes: In the case that the n-th outlet air temperature does not meet the second set condition, according to the n-th expansion valve opening degree, the current adjustment direction, and the set value, an (n+1)-th expansion valve opening degree is obtained, and the air conditioning expansion valve is adjusted and controlled to run in the adjustment state according to the (n+1)-th expansion valve opening degree; In the case that the n-th outlet air temperature meets the second set condition, a (n-1)-th expansion valve opening degree corresponding to the (n-1)-th outlet air temperature is determined as an optimal expansion valve opening degree, and the air conditioning expansion valve is adjusted and controlled to run in the stable state according to the optimal expansion valve opening degree.

5. An apparatus for controlling an air conditioning expansion valve, characterized by, It includes: A first acquisition module configured to acquire a current outlet air temperature and a current expansion valve opening degree of an air conditioner running in a stable state of a current running mode; A direction determination module configured to, in the case that the current outlet air temperature meets a first set condition, adjust the current expansion valve opening degree for testing, obtain a test outlet air temperature corresponding to the air conditioner, and determine a current adjustment direction of the air conditioning expansion valve according to the test outlet air temperature and the current running mode, wherein, in the case of the current running mode being the cooling mode, the first set condition is greater than or equal to the target outlet air temperature; in the case of the current running mode being the heating mode, the first set condition is less than or equal to the target outlet air temperature; A first adjustment module configured to control the air conditioning expansion valve to run in the adjustment state according to the current adjustment direction and the current expansion valve opening degree; The direction determination module includes a first test unit, a second test unit, and a direction determination unit, wherein, The first test unit is configured to increase the current expansion valve opening degree by a set value to obtain an increased test expansion valve opening degree, and determine an increased test outlet air temperature obtained after running according to the increased test expansion valve opening degree; The second test unit is configured to reduce the current expansion valve opening degree by a set value to obtain a reduced test expansion valve opening degree, and determine the obtained outlet air temperature after running according to the reduced test expansion valve opening degree as a reduced test outlet air temperature; The direction determination unit is configured to, in the case that the current operation mode is the cooling mode, determine the adjustment direction corresponding to the smaller one of the increased test outlet air temperature and the reduced test outlet air temperature as the current adjustment direction; and in the case that the current operation mode is the heating mode, determine the adjustment direction corresponding to the larger one of the increased test outlet air temperature and the reduced test outlet air temperature as the current adjustment direction.

6. An apparatus for air conditioning expansion valve control, the apparatus comprising a processor and a memory having stored therein program instructions, the apparatus characterized by, The processor is configured to execute the program instructions to perform the method for controlling an expansion valve of an air conditioner according to any one of claims 1 to 4 when the program instructions are executed.

7. An air conditioner characterized by comprising: The method comprises: An air conditioner body; The device for controlling an expansion valve of an air conditioner according to claim 5 or 6 is installed in the air conditioner body.

8. A storage medium storing program instructions, characterized in that, The program instructions are executed to perform the method for controlling an expansion valve of an air conditioner according to any one of claims 1 to 4 when the program instructions are executed.

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