Air volume correction control method, device and multi-connected air conditioner unit of indoor unit of air conditioner

Abstract

The present invention provides a method and device for correcting the air volume of an indoor unit of an air conditioner and a multi-connected air conditioner unit. The method includes: presetting a preset rotation speed of the indoor unit of the air conditioner; setting a sampling rotation speed F s , collecting the corresponding sampling powers when the indoor unit of the air conditioner operates in different static pressure intervals at the sampling rotation speed F s and under the condition of a constant air volume, which are recorded as a sampling power data set W s ; operating the indoor unit of the air conditioner at the sampling rotation speed F s , and collecting in real time the actual power W s when the indoor unit of the air conditioner operates at the sampling rotation speed F s '; calculating the power deviation rate e of the indoor unit of the air conditioner according to the sampling power data set W s and the actual power W s '; comparing to obtain the minimum power deviation rate e min , and obtaining the actual static pressure value and the preset rotation speed F min corresponding to the actual static pressure value according to the sampling power corresponding to the minimum power deviation rate e x . The present invention can timely and accurately correct the final duct static pressure affected by various factors, adjust the fan rotation speed, improve the user experience, avoid energy waste, and achieve the purpose of energy saving.

Description

Technical Field

[0001] The present invention relates to the field of air conditioners, and specifically to an air volume correction control method, device and multi-connected air conditioner unit for an indoor unit of an air conditioner. Background Art

[0002] For the air volume correction control of the existing multi-connected indoor unit fan, the air volume correction is achieved by selecting a preset rotation speed through a DIP switch. However, the number of DIP switches limits the number of preset rotation speeds, and in actual engineering installations, affected by the shape and length of the return air box and supply air box, and the dirt blockage of the filter screen, etc., the static pressure of the air duct is not constant, and the air volume correction cannot be accurately achieved according to the static pressure of the air duct, affecting the use effect.

[0003] The prior art (CN113108443A) discloses a control method for constant air volume of an air duct machine, including pre-testing the preset rotation speed and preset output power corresponding to different static pressure intervals of the air duct machine; testing the correction rotation speed of the air duct machine under different first temperature values and first humidity values relative to the standard temperature value and standard humidity value; when the air duct machine is running, first running at the preset rotation speed F10 of 100Pa static pressure, and the actual power at this time is SW10; comparing the actual power SW with the pre-tested preset power W to identify the final rotation speed: if the actual power SW10 meets the first condition, then F10 is the automatically identified final rotation speed; if the actual power SW10 meets the second condition, running at the preset rotation speed F11 of 110Pa static pressure, and the actual power at this time is SW11; if the actual power SW10 meets the third condition, running at the preset rotation speed F9 of 90Pa static pressure, and the actual power at this time is SW9. Although this technical solution also involves the correction of the fan rotation speed, it is necessary to keep the air volume constant, and multiple judgments and debugging are required, which takes a long time and has low operating efficiency. Summary of the Invention

[0004] In view of the above problems, the present invention provides an air volume correction control method, device and multi-connected air conditioner unit for an indoor unit of an air conditioner with simple method and high operating efficiency, which can timely and accurately correct the final static pressure of the air duct affected by the shape and length of the return air box and supply air box, dirt blockage of the filter screen, etc., adjust the fan rotation speed, improve the user use effect, avoid energy waste, and achieve the purpose of energy saving. Even when the air volume is not constant, the static pressure data can be obtained by obtaining the minimum power deviation between the actual power and the sampled power, reducing the difficulty of obtaining the static pressure data and improving the accuracy of obtaining the static pressure data.

[0005] The present invention provides an air volume correction control method for an indoor unit of an air conditioner, including the following steps:

[0006] Presetting step: preset the rotation speeds corresponding to the indoor unit of the air conditioner when running at a constant air volume and different static pressure intervals, denoted as preset rotation speed F x ;

[0007] Sampling power data set W s Obtaining step: Set the sampling rotation speed F s , and collect the corresponding sampling power when the indoor unit of the air conditioner operates in different static pressure ranges at the sampling rotation speed F s , which is recorded as the sampling power data set W s ;

[0008] Actual power obtaining step: Operate the indoor unit of the air conditioner at the sampling rotation speed F s , and collect the actual power W' of the indoor unit of the air conditioner in real time when it operates at the sampling rotation speed F s ; s ’;

[0009] Calculation step: According to the sampling power data set W s obtained in the obtaining step, and the actual power W s ’ obtained in the actual power obtaining step, calculate the power deviation rate e of the indoor unit of the air conditioner; where s ’;

[0010]

[0011] Comparison step: According to the calculation result of the calculation step, compare to obtain the minimum power deviation rate e min ;

[0012] Rotation speed determination step: According to the minimum power deviation rate e min and its corresponding sampling power, determine the actual static pressure value of the indoor unit of the air conditioner in the actual power obtaining step, and according to the corresponding relationship between different static pressure ranges and the preset rotation speed F x in the preset step, determine the preset rotation speed F x corresponding to the actual static pressure value, as the final identification rotation speed of the indoor unit of the air conditioner

[0013] The control method of the present invention obtains the sampled power closest to the actual power by calculating the minimum power deviation rate, and obtains the actual static pressure according to the corresponding relationship between the sampled power and the corresponding static pressure. This actual static pressure value is actually the actual static pressure obtained after considering the comprehensive factors such as the shape and length of the return air box and the supply air box, the dirt blockage of the filter screen, the temperature and humidity, etc., which improves the accuracy of the actual static pressure data and also reduces the difficulty of obtaining the actual static pressure; it also overcomes the defect that the air conditioner unit in the prior art cannot or is not convenient to measure the static pressure data by itself, and saves costs; further, after the actual power is collected, the control method of the present invention can determine the final identified speed through the operation and comparison steps, without multiple judgments and debugging, reducing the complexity of the operation and improving the operation speed, and can timely correct the speed of the air conditioner indoor unit according to the actual power, improving the timeliness and accuracy of the speed adjustment; in addition, in the actual operation step, there is no need to keep the air volume constant, and the final identified speed can also be obtained according to the measured actual power, overcoming the influence of the non-constant air volume on the correction control method. The air volume correction control method of the air conditioner indoor unit of the present invention has the advantages of simplicity, wide application range and fast operation speed, improving the timeliness of the air volume correction of the indoor unit of the multi-connected unit, enabling the multi-connected unit to operate at the correct speed, being beneficial to saving energy consumption and improving the refrigeration or heating effect, and enhancing the user experience.

[0014] In an alternative technical solution of the present invention, before the preset step, there is also a preset speed acquisition step: measuring the speeds corresponding to different static pressure intervals when the air conditioner indoor unit operates under the condition of constant air volume; the preset step sets the preset speed F according to the acquisition result of the preset speed acquisition step x 。

[0015] According to this technical solution, obtaining the speeds corresponding to different static pressure intervals under the condition of constant air volume is beneficial to improving the accuracy of the preset speed.

[0016] In an alternative technical solution of the present invention, in the preset speed acquisition step, a static pressure gauge is used to measure and obtain the static pressure data.

[0017] According to this technical solution, using a static pressure gauge to obtain the static pressure data of the air conditioner indoor unit is simple and fast, reducing the difficulty of the correction control method.

[0018] In an alternative technical solution of the present invention, in the actual power acquisition step, it is carried out after the air conditioner indoor unit enters the automatic identification function.

[0019] According to this technical solution, the air conditioner indoor unit operates the actual power acquisition step after entering the automatic identification function, which is beneficial to improving the accuracy of the actual power data.

[0020] In an alternative technical solution of the present invention, in the operation step, each sampled power in the sampled power data set W s is respectively compared and calculated with the actual power to obtain the power deviation rate e.

[0021] According to this technical solution, under the condition that the actual static pressure is unknown, the minimum power deviation rate is obtained by calculating the power deviation rates of the sampling power corresponding to different static pressures and the actual power, so that the sampling power closest to the actual power in the sampling power dataset and the static pressure corresponding to the sampling power can be obtained. This static pressure is the actual static pressure, which improves the accuracy of obtaining static pressure data and is conducive to improving the accuracy of air volume correction.

[0022] In an alternative technical solution of the present invention, in the preset step, the numerical range of different static pressure intervals is 0 - 200 Pa.

[0023] According to this technical solution, by selecting a suitable static pressure interval, the breadth of air volume correction and the computational amount of the air volume correction method can be taken into account, improving the efficiency of the air volume correction method.

[0024] In an alternative technical solution of the present invention, in the preset step, the number of preset speeds is not less than 10.

[0025] According to this technical solution, dividing the static pressure interval into smaller intervals can correspondingly increase the number of preset speeds, so that different static pressure data have corresponding preset speeds, which is conducive to improving the accuracy of speed regulation and the accuracy of air volume correction of the indoor unit, avoiding unnecessary energy consumption, and improving the energy-saving performance of the air conditioner.

[0026] In an alternative technical solution of the present invention, the sampling speed F s is different from the preset speed.

[0027] According to this technical solution, due to the influence of comprehensive factors such as the shape and length of the return air box and the supply air box, the fouling of the filter screen, and the temperature and humidity, operating at a suitable sampling speed is conducive to narrowing the gap between the actual power and the sampling power, making the minimum power deviation rate lower, thereby improving the accuracy of the actual static pressure data, and thus matching the accurate preset speed and improving the accuracy of air volume correction of the indoor unit of the multi-connected air conditioner.

[0028] The present invention further provides an air volume correction control device for an air conditioner indoor unit, including:

[0029] A preset module that presets the speeds corresponding to the air conditioner indoor unit when operating at a constant air volume and different static pressure intervals, denoted as the preset speed F x ;

[0030] A sampling power dataset W s An acquisition module that sets the sampling speed F s , and acquires the sampling power corresponding to the air conditioner indoor unit when operating at different static pressure intervals at the sampling speed F s and a constant air volume, denoted as the sampling power dataset W s ;

[0031] Actual power acquisition module, at sampling speed F s Operate the indoor unit of the air conditioner and collect in real time the actual power W of the indoor unit of the air conditioner at sampling speed F s during operation s ’;

[0032] Operation module, communicating with the sampled power data set W s The acquisition module and the actual power acquisition module are communicatively connected. The operation module calculates the power deviation rate e of the indoor unit of the air conditioner according to the sampled power data set W s The sampled power data set W obtained by the acquisition module s and the actual power W obtained by the actual power acquisition module s ’, calculate the power deviation rate e of the indoor unit of the air conditioner; where

[0033]

[0034] Comparison module, communicatively connected to the operation module. The comparison module obtains the minimum power deviation rate e by comparison according to the operation result of the operation module min ;

[0035] Rotation speed determination module, communicatively connected to the preset module and the comparison module. The rotation speed determination module determines the actual static pressure value of the indoor unit of the air conditioner in the actual power acquisition module according to the minimum power deviation rate e min and its corresponding sampled power, and determines the preset rotation speed F corresponding to the actual static pressure value according to the correspondence between different static pressure intervals and the preset rotation speed F x in the preset module x , and use it as the final identified rotation speed of the indoor unit of the air conditioner

[0036] The present invention further provides a multi-connected air conditioner unit, including the air volume correction control device of the above-mentioned indoor unit of the air conditioner

[0037] The present invention further provides a computer-readable storage medium, storing a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned air volume correction control method of the indoor unit of the air conditioner are realized

[0038] Through the air volume correction control method of the indoor unit of the air conditioner, the present invention can timely and accurately correct the final duct static pressure affected by the shape and length of the return air box and the supply air box, the dirt blockage of the filter screen, etc., adjust the fan rotation speed, improve the user experience, avoid energy waste, and achieve the purpose of energy saving Description of the Drawings

[0039] Figure 1 It is a schematic flowchart of the air volume correction control method of the indoor unit of the air conditioner in the embodiment of the present invention

[0040] Figure 2Schematic structural diagram of the modular air volume correction control device for the indoor unit of the air conditioner in the embodiment of the present invention.

[0041] Figure 3 Schematic structural diagram of the multi-connected air conditioner unit in the embodiment of the present invention.

[0042] Reference numerals:

[0043] Preset module 1; Sampling power data set W s Acquisition module 2; Actual power acquisition module 3; Operation module 4; Comparison module 5; Rotation speed determination module 6; Preset rotation speed acquisition module 7; Compressor 81; Four-way valve 82; Throttle valve 83; Outdoor heat exchanger 84; Outdoor unit fan 841; Indoor unit 85; Outdoor unit fan 841; Gas-liquid separator 86; Oil separator 87; Oil return capillary 88. Specific implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Please refer to Figure 1 As shown, this embodiment provides an air volume correction control method for the indoor unit of an air conditioner, including the following steps:

[0046] Preset step: Preset the rotation speeds corresponding to the indoor unit of the air conditioner when operating at a constant air volume and different static pressure intervals, denoted as preset rotation speed F x ;

[0047] Sampling power data set W s Acquisition step: Set the sampling rotation speed F s , and collect the sampling powers corresponding to the indoor unit of the air conditioner when operating at different static pressure intervals at the sampling rotation speed F s and under the condition of constant air volume, denoted as sampling power data set W s ;

[0048] Actual power acquisition step: Operate the indoor unit of the air conditioner at the sampling rotation speed F s , and continuously collect the actual power W s when the indoor unit of the air conditioner operates at the sampling rotation speed F s ';

[0049] Operation step: According to the sampling power data set W s The sampling power data set W obtained in the acquisition step s and the actual power W obtained in the actual power acquisition step s’, calculate the power deviation rate e of the indoor unit of the air conditioner; where,

[0050]

[0051] Comparison step: According to the operation result of the operation step, compare to obtain the minimum power deviation rate e min ;

[0052] Rotation speed determination step: According to the minimum power deviation rate e min and its corresponding sampled power, determine the actual static pressure value of the indoor unit of the air conditioner in the actual power acquisition step, and according to the corresponding relationship between different static pressure intervals and the preset rotation speed F x in the preset step, determine the preset rotation speed F corresponding to the actual static pressure value x , as the final recognized rotation speed of the indoor unit of the air conditioner.

[0053] The control method of this embodiment obtains the sampled power closest to the actual power by calculating the minimum power deviation rate, and obtains the actual static pressure according to the corresponding relationship between the sampled power and the corresponding static pressure. This actual static pressure value is actually the actual static pressure obtained after considering the comprehensive factors such as the shape and length of the return air box and the supply air box, filter clogging, temperature and humidity, etc., which improves the accuracy of the actual static pressure data and also reduces the difficulty of obtaining the actual static pressure; it also overcomes the defect that the air conditioner unit itself in the prior art cannot or is not convenient to measure the static pressure data, and saves costs; further, the control method of this embodiment can determine the final recognized rotation speed through the operation and comparison steps after collecting the actual power, without multiple judgments, reducing the complexity of the operation and improving the operation speed, and can timely correct the rotation speed of the indoor unit of the air conditioner according to the actual power, improving the timeliness and accuracy of the rotation speed adjustment; in addition, in the actual operation step, there is no need to keep the air volume constant, and the final recognized rotation speed can also be obtained according to the measured actual power, overcoming the influence of the non-constant air volume on the correction control method. The air volume correction control method of the indoor unit of this embodiment has the advantages of simplicity, wide application range, and fast operation speed, improving the timeliness of the air volume correction of the indoor unit of the multi-connected unit, enabling the multi-connected unit to operate at the correct rotation speed, being beneficial to saving energy consumption and improving the refrigeration or heating effect, and enhancing the user experience.

[0054] In the preferred embodiment of the present invention, before the preset step, there is also a preset rotation speed acquisition step: measure the rotation speeds corresponding to the indoor unit of the air conditioner when operating in different static pressure intervals under the condition of constant air volume; the preset step sets the preset rotation speed F according to the acquisition result of the preset rotation speed acquisition step x .

[0055] In the above way, obtaining the rotation speeds corresponding to different static pressure intervals under constant air volume is beneficial to improving the accuracy of the preset rotation speed.

[0056] In a preferred embodiment of the present invention, in the step of obtaining the preset rotational speed, the static pressure data is measured by a static pressure gauge. Under laboratory test conditions, obtaining the static pressure data of the indoor unit of the air conditioner by using a static pressure gauge is simple and fast, and reduces the difficulty of the correction control method.

[0057] In a preferred embodiment of the present invention, in the step of obtaining the actual power, it is carried out after the indoor unit of the air conditioner enters the automatic recognition function. In the above manner, after the indoor unit of the air conditioner enters the automatic recognition function, the actual power acquisition step is performed, which is beneficial to improving the accuracy of the actual power data. The automatic recognition function is an inherent program of the air conditioner, which can recognize various parameters during the operation of the air conditioner, such as rotational speed, power, etc., and will not be elaborated here.

[0058] In a preferred embodiment of the present invention, in the operation step, each sampling power in the sampling power data set W s is respectively compared with the actual power to calculate the power deviation rate e.

[0059] In the above manner, under the condition that the actual static pressure is unknown, by calculating the power deviation rate of the sampling power corresponding to different static pressures and the actual power to obtain the minimum power deviation rate, the sampling power closest to the actual power and the static pressure corresponding to the sampling power can be obtained, and this static pressure is the actual static pressure, which improves the accuracy of obtaining the static pressure data, and further is beneficial to improving the accuracy of the air volume correction.

[0060] In a preferred embodiment of the present invention, the indoor unit of the air conditioner is a ducted air conditioner indoor unit. The ducted air conditioner has the advantages of beautiful appearance and low cost.

[0061] In a preferred embodiment of the present invention, in the preset step, the numerical range of different static pressure intervals is 0 - 200 Pa. By selecting a suitable static pressure interval, the breadth of the air volume correction and the calculation amount of the air volume correction method can be taken into account, and the efficiency of the air volume correction method is improved; in other ways, 0 - 300 Pa, 50 - 300 Pa can also be selected, and it is not limited to the examples given in the embodiments of the present invention.

[0062] In a preferred embodiment of the present invention, in the preset step, the number of preset rotational speeds is not less than 10. By dividing the static pressure interval into smaller intervals, the number of preset rotational speeds can be correspondingly increased, so that different static pressure data have corresponding preset rotational speeds, which is beneficial to improving the accuracy of rotational speed adjustment and the accuracy of indoor unit air volume correction, avoiding unnecessary energy consumption, and improving the energy-saving performance of the air conditioner. Preferably, the number of preset rotational speeds is 21, and the static pressure values are divided in units of 10, including 0, 10, 20, 30, 40, 50... 180, 190, 200 Pa; further, in order to improve the accuracy, the static pressure values can be divided more finely, such as in units of 5, 0, 5, 10, 15, 20... 190, 195, 200 Pa.

[0063] In a preferred embodiment of the present invention, after determining the final recognized rotational speed, the indoor unit of the air conditioner is operated at the final recognized rotational speed.

[0064] The above describes the correction control method for the air volume of the indoor unit of the air conditioner in this embodiment. The following is described with a specific embodiment.

[0065] Specifically, under laboratory conditions, the rotational speeds (F0, F1, F2, F3... F 20 ) corresponding to a constant air volume when the static pressure is from 0 Pa to 200 Pa are measured and recorded as the preset rotational speed F x ;

[0066] When operating at the sampling rotational speed F s , the power corresponding to the static pressure from 0 Pa to 200 Pa (specifically referring to 0, 10, 20, 30, 40, 50... 180, 190, 200 Pa) is collected as W si (i = 0 - 20, specifically W s0 , W s1 , W s2 , W s3 ... W s20 ), the power corresponding to 0 Pa is W s0 , the power corresponding to 10 Pa is W s1 , the power corresponding to 20 Pa is W s2 ... and so on;

[0067] At the engineering installation site, after the indoor unit of the air conditioner enters the automatic recognition function, the power collected when operating at the sampling rotational speed F s is W s ';

[0068] According to the following formula, the power deviation rate corresponding to different static pressures is calculated as e j (j = 0 - 20, specifically е0, е1, е2, е3... е 20 );

[0069]

[0070] Compare to obtain the minimum power deviation rate е min (е min = the minimum value among (е0, е1, е2, е3... е 20 )), and its corresponding actual static pressure is xx Pa. Then, according to the corresponding relationship between the static pressure and the preset rotational speed, the preset rotational speed F xx corresponding to this actual static pressure is obtained as the final rotational speed for automatic recognition. For example, the minimum power deviation rate е min= e8, the main controller identifies the corresponding actual static pressure as 80 Pa, and then corresponds to the preset steps to retrieve the preset rotational speed F8 as the final rotational speed automatically identified.

[0071] Please refer to Figure 2 As shown, this embodiment further provides an air volume correction control device for an air conditioner indoor unit, including:

[0072] Preset module 1, which presets the rotational speeds corresponding to the air conditioner indoor unit when operating in different static pressure ranges at a constant air volume, denoted as preset rotational speed F x ;

[0073] Sampling power data set W s Acquisition module 2, which sets the sampling rotational speed F s , and collects the sampling powers corresponding to the air conditioner indoor unit when operating in different static pressure ranges at the sampling rotational speed F s and under the condition of constant air volume, denoted as sampling power data set W s ;

[0074] Actual power acquisition module 3, which operates the air conditioner indoor unit at the sampling rotational speed F s , and continuously collects the actual power W s when the air conditioner indoor unit operates at the sampling rotational speed F s ';

[0075] Operation module 4, which is communicatively connected to the sampling power data set W s acquisition module 2 and the actual power acquisition module 3. The operation module 4 calculates the power deviation rate e of the air conditioner indoor unit according to the sampling power data set W s acquired by the acquisition module 2 and the actual power W s acquired by the actual power acquisition module 3; among them, s '.

[0076]

[0077] Comparison module 5, which is communicatively connected to the operation module 4. The comparison module 5 obtains the minimum power deviation rate e according to the operation result of the operation module 4 min ;

[0078] Rotational speed determination module 6, which is communicatively connected to the preset module 1 and the comparison module 5. The rotational speed determination module 6 determines the actual static pressure value of the air conditioner indoor unit in the actual power acquisition module according to the minimum power deviation rate e min and its corresponding sampling power, and determines the preset rotational speed F x corresponding to the actual static pressure value according to the corresponding relationship between different static pressure ranges and the preset rotational speed F x in the preset module 1, and uses it as the final identified rotational speed of the air conditioner indoor unit.

[0079] In a preferred embodiment of the present invention, the air volume correction control device of the indoor air conditioner further includes a control module (not shown in the figure), and the control module controls the operation of the indoor air conditioner according to the determined final recognized speed. Specifically, the preset module 1, the actual power acquisition module 3, the operation module 4, the comparison module 5 and the speed determination module 6 can be partially or fully integrated into the control module, and the control module is preferably the main control board of the air conditioner.

[0080] In a preferred embodiment of the present invention, a preset speed acquisition module 7 is further included, which is used to measure the speeds corresponding to the indoor air conditioner when it operates in different static pressure ranges under the condition of constant air volume; so that the preset module 1 sets the preset speed F according to the acquisition result of the preset speed acquisition module 7 x . The preset speed acquisition module 7 can be integrated into the control module, that is, the main control board identifies the speeds corresponding to the indoor air conditioner when it operates in different static pressure ranges under the condition of constant air volume. In other embodiments, the static pressure and the corresponding speed can also be manually recorded. The static pressure value is obtained by a static pressure gauge under the test conditions, and the acquisition method is simple. The speed is read by the main control board.

[0081] In a preferred embodiment of the present invention, the preset speed acquisition module 7 includes a static pressure gauge, and the static pressure data is measured by the static pressure gauge. Under the laboratory test conditions, the static pressure data of the indoor air conditioner is obtained by the static pressure gauge, which is simple and fast, and reduces the difficulty of the correction control method.

[0082] In a preferred embodiment of the present invention, the actual power acquisition module 3 acquires the actual power after the indoor air conditioner enters the automatic recognition function. By the above method, the indoor air conditioner runs the actual power acquisition step after entering the automatic recognition function, which is beneficial to improving the accuracy of the actual power data. The automatic recognition function is an inherent program of the air conditioner, which can recognize various parameters during the operation of the air conditioner, such as speed, power, etc., and will not be elaborated here.

[0083] In a preferred embodiment of the present invention, the operation module 4 compares each sampling power in the sampling power data set W s with the actual power respectively to obtain the power deviation rate e. Under the condition that the actual static pressure is unknown, by calculating the power deviation rates of the sampling powers corresponding to different static pressures and the actual power, the minimum power deviation rate can be obtained, and thus the sampling power closest to the actual power and the static pressure corresponding to the sampling power can be obtained. This static pressure is the actual static pressure, which improves the accuracy of the static pressure data acquisition and further facilitates improving the accuracy of the air volume correction.

[0084] Further, as Figure 3As shown in the figure, this embodiment further provides a multi-connected air conditioner unit, which includes the air volume correction control device of the above-mentioned air conditioner indoor unit. In addition, the multi-connected air conditioner unit includes a compressor 81, a four-way valve 82, a throttle valve 83, an outdoor heat exchanger 84, a plurality of indoor units 85 arranged in parallel, an outdoor unit fan 841, a gas-liquid separator 86, etc. Each indoor unit 85 is correspondingly provided with an indoor unit fan (not shown in the figure); further, an oil separator 87 is also provided between the compressor 81 and the four-way valve 82, and an oil return capillary 88 is also provided between the outlet of the oil separator 87 and the suction port of the compressor 81; a heat exchanger outlet temperature sensor T3 is provided at the outlet of the outdoor heat exchanger 84, a high-pressure sensor is provided between the four-way valve 82 and the oil separator 87, a low-pressure sensor is provided between the four-way valve 82 and the gas-liquid separator 86, a low-pressure stop valve is provided between the outlet of the four-way valve 82 and the inlet of the indoor unit 85, a high-pressure stop valve is provided between the outlet of the indoor unit 85 and the throttle valve 83, one-way valves are connected in parallel on both sides of the throttle valve 83, and an ambient temperature sensor is also included. It should be noted that the air volume correction control device or control method of the air conditioner indoor unit in this embodiment is not only applicable to Figure 3 the multi-connected air conditioner unit shown in the figure, but also applicable to other forms of air conditioners, and will not be exemplified one by one here.

[0085] The air volume correction control device of the air conditioner indoor unit in this embodiment can timely and accurately correct the final duct static pressure affected by the shape and length of the return air box and the supply air box, the dirt blockage of the filter screen, etc., adjust the speed of the indoor unit fan, improve the user experience, avoid energy waste, and achieve the purpose of energy saving.

[0086] This embodiment further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the above-mentioned air volume correction control method of the air conditioner indoor unit are realized.

[0087] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for correcting the air volume control of an indoor unit of an air conditioner, characterized in that, It includes the following steps: Preset steps: Preset the rotational speeds corresponding to the operation of the air conditioner indoor unit at a constant air volume in different static pressure ranges, denoted as the preset rotational speed F x ; Sampling power data set W s Obtaining step: Set the sampling rotation speed F s , and collect the sampling power corresponding to the operation of the indoor unit of the air conditioner in the different static pressure ranges under the sampling rotation speed F s and the constant air volume condition, which is denoted as the sampling power data set W s ; Actual power acquisition steps: at the sampling speed F s Run the indoor unit of the air conditioner and collect the actual power W s when the indoor unit of the air conditioner runs at the sampling speed F s ’; Operation steps: According to the sampled power data set W s The sampled power data set W obtained by the obtaining step s and the actual power W obtained by the actual power obtaining step s ’, calculate the power deviation rate e of the indoor unit of the air conditioner; where Comparison step: Based on the operation result of the said operation step, compare to obtain the minimum power deviation rate e min ; Rotation speed determination step: According to the minimum power deviation rate e min and its corresponding sampled power, determine the actual static pressure value of the indoor unit of the air conditioner in the actual power acquisition step, and according to the correspondence between the different static pressure intervals and the preset rotation speed F x in the preset step, determine the preset rotation speed F corresponding to the actual static pressure value x , which is used as the final recognized rotation speed of the indoor unit of the air conditioner.

2. The air volume correction control method of the indoor unit of the air conditioner according to claim 1, characterized in that, Before the preset steps, it further includes a preset rotational speed acquisition step: measuring the rotational speeds respectively corresponding to the operation of the indoor unit of the air conditioner at different static pressure intervals under the condition of constant air volume; The preset step sets the preset rotational speed F according to the acquisition result of the preset rotational speed acquisition step x .

3. The air volume correction control method for the indoor unit of an air conditioner according to claim 1, characterized in that, In the preset rotational speed acquisition step, a static pressure instrument is used to measure and obtain static pressure data.

4. The air volume correction control method of the indoor air conditioner according to claim 1, wherein, In the actual power acquisition step, it is carried out after the indoor unit of the air conditioner enters the automatic recognition function.

5. The air volume correction control method of the indoor unit of the air conditioner according to claim 1, characterized in that, In the described operation steps, the sampled power data set W s is used to calculate the power deviation rate e by comparing each sampled power in it with the actual power respectively.

6. The air volume correction control method of the indoor unit of an air conditioner according to claim 1, characterized in that In the preset steps, the numerical range of the different static pressure intervals is 0 - 200 Pa.

7. The air volume correction control method of the indoor air conditioner according to claim 1, characterized in that In the preset steps, the number of the preset rotational speeds is not less than 10.

8. The air volume correction control method for the indoor unit of an air conditioner according to claim 1, characterized in that The sampling rotation speed F s is different from the preset rotation speed.

9. An air volume correction control device for an indoor unit of an air conditioner, characterized in that, It includes: Preset module, which records the rotational speeds corresponding to the air conditioner indoor unit operating at a constant air volume in different static pressure ranges, denoted as preset rotational speed F x ; Sampling power data set W s An acquisition module is configured to set a sampling rotation speed F s , and acquire the corresponding sampling powers respectively when the indoor unit of the air conditioner operates in the different static pressure ranges under the condition of the sampling rotation speed F s and a constant air volume, which are recorded as the sampling power data set W s ; Actual power acquisition module, at the sampling speed F s Run the indoor unit of the air conditioner and collect the actual power W of the indoor unit of the air conditioner when running at the sampling speed F s s ’;​ An operation module, which communicates with the sampled power data set W s is communicatively connected to the acquisition module and the actual power acquisition module. The operation module calculates the power deviation rate e of the indoor unit of the air conditioner according to the sampled power data set W s sampled power data set W obtained by the acquisition module s and the actual power W obtained by the actual power acquisition module s '; where A comparison module, communicatively connected to the operation module, compares to obtain a minimum power deviation rate e according to the operation result of the operation module min ; A rotational speed determination module, communicatively connected to the preset module and the comparison module, determines the actual static pressure value of the indoor unit of the air conditioner in the actual power acquisition module according to the minimum power deviation rate e min and its corresponding sampled power, and determines the preset rotational speed F corresponding to the actual static pressure value according to the correspondence between different static pressure intervals and the preset rotational speed F x in the preset module, x and uses it as the final identified rotational speed of the indoor unit of the air conditioner.

10. A multi-connected air conditioner unit, characterized in that, It includes the air volume correction control device of the indoor unit of the air conditioner described in Claim 9.

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