Multi-split air conditioner and control method and control device thereof

Abstract

The present invention discloses a multi-split air conditioner and a control method and a control device thereof, so as to improve the accuracy of air conditioner control and the comfort of use, and realize the function of intelligent air conditioner. The control method comprises: when receiving the indoor unit temperature reaching shutdown signal, obtaining the first detection temperature and the first indoor temperature; correcting the first indoor temperature according to the first detection temperature to obtain the corrected indoor temperature; taking the moment when the corrected indoor temperature meets the preset blowing residual heat time correction condition as the timing start time, starting the timing, and respectively obtaining the first timing time, the second timing time and the third timing time according to the preset conditions; when the difference between the third timing time and the second timing time meets the preset time condition, determining the third timing time as the corrected blowing residual heat time; otherwise, determining the first timing time as the corrected blowing residual heat time.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular, relates to an air conditioner, and more particularly, to a multi-split air conditioner and a control method and a control device thereof. Background Art

[0002] A multi-split air conditioner usually includes multiple indoor units, and the refrigerant pipelines of the multiple indoor units are connected in parallel, sharing one or more outdoor units. For a multi-split air conditioner, the indoor unit is usually provided with a temperature detection device at its return air outlet, and the return air temperature detected by the temperature detection device is used to determine whether the indoor unit meets the temperature shutdown condition. When an indoor unit meets the temperature shutdown condition, the usual control scheme is to blow the residual heat to the indoor unit, blow out the heat accumulated in the indoor unit, and then close the throttling component of the indoor unit.

[0003] In the prior art, the residual heat blowing time of a multi-split air conditioner is usually a fixed value determined when the air conditioner leaves the factory. Some multi-split air conditioners use a non-fixed value for the residual heat blowing time, and use the indoor fan speed when entering the residual heat blowing state to determine the residual heat blowing time.

[0004] However, whether using a fixed value for the residual heat blowing time or determining the residual heat blowing time based on the indoor fan speed, it only starts from the operating status of the multi-split air conditioner itself, and does not consider the influence of relevant factors such as the room structure where the indoor unit is installed, the installation position of the indoor unit in the room, and the installation method. As a result, during the use of the multi-split air conditioner, there will often be problems such as the room temperature drops after the indoor unit reaches the temperature and stops, and the indoor unit should be started but cannot be started normally again, or there will be a problem of cold air blowing when the residual heat is blown when the temperature reaches the temperature and stops. All of these will cause the room temperature to be unsuitable and affect the user's comfort. Summary of the invention

[0005] One object of the present invention is to provide a control method and control device for a multi-split air conditioner, which adjusts the residual heat blowing time based on the corrected temperature, so that the residual heat blowing time is adaptive to the installation status of the indoor unit of the air conditioner, improves the accuracy of air conditioner control and the comfort of use, and realizes the function of an intelligent air conditioner.

[0006] In order to achieve the above-mentioned object of the invention, the control method of the multi-split air conditioner provided by the present invention is implemented by adopting the following technical scheme:

[0007] A control method for a multi-split air conditioner, the control method comprising:

[0008] Upon receiving a temperature-reaching shutdown signal of the indoor unit, obtaining a first detected temperature reflecting a temperature perceived by a human body in the room where the indoor unit is located and a first indoor temperature detected by the indoor unit;

[0009] Correcting the first indoor temperature according to the first detected temperature to obtain a corrected indoor temperature;

[0010] When the corrected indoor temperature meets the preset residual heat blowing time correction condition, the following process of determining the corrected residual heat blowing time is performed:

[0011] The time when the corrected indoor temperature meets the preset residual heat blowing time correction condition is taken as the timing start time, and the timing starts;

[0012] During the timing process, a second detected temperature reflecting the temperature perceived by a human body in the room where the indoor unit is located, a second indoor temperature detected by the indoor unit, and an internal coil temperature of the indoor unit are obtained in real time;

[0013] Determine the time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature satisfies the first temperature difference condition and the inner coil temperature satisfies the preset coil temperature condition as the first timing time;

[0014] The time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the second temperature difference condition and the inner coil temperature does not meet the preset coil temperature condition is determined as the second timing time; the second timing time is greater than the first timing time;

[0015] The time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the third temperature difference condition is determined as the third timing time; the third timing time is greater than the second timing time;

[0016] When the difference between the third timing time and the second timing time meets a preset time condition, the third timing time is determined to be the corrected post-blowing residual heat time; otherwise, the first timing time is determined to be the corrected post-blowing residual heat time.

[0017] In some embodiments of the present application, the method further comprises:

[0018] After the corrected indoor temperature meets the preset residual heat blowing time correction condition, controlling the fan of the indoor unit to run at a first preset speed;

[0019] After the difference between the second indoor temperature and the second detected temperature satisfies the first temperature difference condition and the internal coil temperature satisfies the preset coil temperature condition, controlling the fan of the indoor unit to run at a second preset speed; the second preset speed is less than the first preset speed;

[0020] After the difference between the second indoor temperature and the second detected temperature satisfies the second temperature difference condition and the inner coil temperature does not satisfy the preset coil temperature condition, the fan of the indoor unit is controlled to stop.

[0021] In some embodiments of the present application, the method further comprises:

[0022] When the corrected indoor temperature does not satisfy the preset residual heat blowing time correction condition, the indoor unit is controlled to perform cold wind prevention control or the indoor unit is controlled to maintain an operating state.

[0023] In some embodiments of the present application, the preset residual heat blowing time correction condition includes: the indoor temperature after correction is greater than the set temperature;

[0024] When the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, controlling the indoor unit to perform the cold wind prevention control or controlling the indoor unit to maintain the operating state includes:

[0025] When the corrected indoor temperature is lower than the set temperature, controlling the indoor unit to perform the cold wind prevention control;

[0026] When the corrected indoor temperature is equal to the set temperature, the indoor unit is controlled to maintain its operating state.

[0027] In some embodiments of the present application, when the corrected indoor temperature meets the preset residual heat blowing time correction condition, the process of determining the corrected residual heat blowing time is performed, including:

[0028] When the corrected indoor temperature meets the preset residual heat blowing time correction condition, determining whether the temperature reaching shutdown signal meets the preset temperature reaching shutdown signal condition;

[0029] When the temperature-reaching shutdown signal satisfies the preset temperature-reaching shutdown signal condition, the process of determining the corrected post-blowing residual heat time is executed; otherwise, the process of determining the corrected post-blowing residual heat time is not executed.

[0030] In some embodiments of the present application, when the corrected indoor temperature satisfies the preset residual heat blowing time correction condition, determining whether the temperature reaching shutdown signal satisfies the preset temperature reaching shutdown signal condition includes:

[0031] When the corrected indoor temperature satisfies the preset residual heat blowing time correction condition, determining whether there is the corrected residual heat blowing time of the indoor unit;

[0032] When the corrected post-blowing residual heat time of the indoor unit does not exist, it is determined whether the temperature reaching shutdown signal satisfies the preset temperature reaching shutdown signal condition; otherwise, it is not determined whether the temperature reaching shutdown signal satisfies the preset temperature reaching shutdown signal condition.

[0033] In some embodiments of the present application, the control method further includes:

[0034] When the corrected residual heat blowing time of the indoor unit does not exist and the temperature reaching shutdown signal does not meet the preset temperature reaching shutdown signal condition, the initial residual heat blowing time of the indoor unit is obtained.

[0035] In order to achieve the above-mentioned purpose of the invention, the control device of the multi-split air conditioner provided by the present invention adopts the following technical scheme to achieve:

[0036] A control device for a multi-split air conditioner, the control device comprising:

[0037] A first detected temperature acquisition unit is used to acquire a first detected temperature reflecting a human body perceived temperature in the room where the indoor unit is located upon receiving a temperature reaching shutdown signal of the indoor unit;

[0038] A first indoor temperature acquisition unit, configured to acquire a first indoor temperature detected by the indoor unit upon receiving a temperature reaching shutdown signal of the indoor unit;

[0039] a corrected indoor temperature obtaining unit, configured to correct the first indoor temperature according to the first detected temperature;

[0040] A corrected indoor temperature judgment unit, used to judge whether the corrected indoor temperature meets a preset residual heat blowing time correction condition;

[0041] A second detected temperature acquisition unit is used to acquire in real time a second detected temperature reflecting a human body perceived temperature in the room where the indoor unit is located during the process of starting to time the corrected indoor temperature to meet the preset residual heat blowing time correction condition;

[0042] A second indoor temperature acquisition unit is used to acquire the second indoor temperature detected by the indoor unit in real time during the process of starting the timing from when the corrected indoor temperature meets the preset residual heat blowing time correction condition;

[0043] An inner coil temperature acquisition unit, used for acquiring the inner coil temperature of the indoor unit in real time during the process of starting the timing from when the corrected indoor temperature meets the preset residual heat blowing time correction condition;

[0044] A first timing time determination unit is used to determine the time from the time when the corrected indoor temperature meets the preset residual heat blowing time correction condition as the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the first temperature difference condition and the inner coil temperature meets the preset coil temperature condition as the first timing time;

[0045] A second timing time determination unit is used to determine the time from the time when the corrected indoor temperature meets the preset residual heat blowing time correction condition as the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the second temperature difference condition and the inner coil temperature does not meet the preset coil temperature condition as the second timing time; the second timing time is greater than the first timing time;

[0046] A third timing time determination unit is used to determine the time from the time when the corrected indoor temperature meets the preset residual heat blowing time correction condition as the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the third temperature difference condition as the third timing time; the third timing time is greater than the second timing time;

[0047] The corrected rear blowing residual heat time is used to determine the third timing time as the corrected rear blowing residual heat time when the difference between the third timing time and the second timing time meets a preset time condition; otherwise, determine the first timing time as the corrected rear blowing residual heat time.

[0048] Another object of the present invention is to provide a multi-split air conditioner, comprising an outdoor unit and a plurality of indoor units, wherein the multi-split air conditioner further comprises the control device of the multi-split air conditioner described above.

[0049] Another object of the present invention is to provide an electronic device, comprising a processor, a memory and a computer program stored in the memory, wherein the processor is configured to execute the computer program to implement the above-mentioned control method of the multi-split air conditioner.

[0050] Compared with the prior art, the advantages and positive effects of the present invention are:

[0051] The multi-split air conditioner and its control method and control device provided by the present invention utilize the detection temperature reflecting the temperature perceived by human beings in the room to correct the indoor temperature, and use the corrected indoor temperature as a judgment parameter for whether to execute the correction of the residual heat blowing time, so as to decide whether to execute the correction of the residual heat blowing time; when correcting the residual heat blowing time, the timing time is determined based on the temperature perceived by human beings in the room, the detection temperature of the indoor unit and the internal coil temperature of the indoor unit, and the corrected residual heat blowing time is further determined according to the timing time, so that the residual heat blowing time is adaptive to the installation status such as the room structure in which the indoor unit of the air conditioner is installed and the installation position of the indoor unit in the room, thereby improving the accuracy of the residual heat blowing time, effectively solving the problems such as the indoor unit not starting when reaching the temperature and blowing cold air when reaching the temperature caused by the inaccurate residual heat blowing time due to the difference in the installation status of the indoor unit, improving the accuracy and use comfort of controlling the air conditioner based on the residual heat blowing time, and realizing the function of the intelligent air conditioner.

[0052] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 It is a flow chart of a first embodiment of a control method for a multi-split air conditioner of the present invention;

[0055] Figure 2 is a flow chart of a second embodiment of a control method for a multi-split air conditioner according to the present invention;

[0056] Figure 3 It is a structural schematic diagram of an embodiment of a control device for a multi-split air conditioner of the present invention;

[0057] Figure 4 It is a schematic structural diagram of an embodiment of the electronic device of the present invention. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0059] It should be noted that, in the description of the present invention, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] It should also be noted that the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0061] The residual heat blowing time used in the control of the existing multi-split air conditioner is based on the operating state of the multi-split air conditioner itself, without considering the influence of related factors such as the structure of the room where the indoor unit is installed, the installation position of the indoor unit in the room, and the installation method, resulting in the problem that the room temperature drops after the indoor unit stops when reaching the temperature, and the indoor unit cannot be started again normally when it should be started, or the problem of blowing cold air when blowing residual heat when reaching the temperature and stopping. In response to such problems, the present invention creatively proposes to determine the timing time based on the human body perceived temperature in the room, the indoor unit detection temperature, and the internal coil temperature of the indoor unit, and determine and correct the residual heat blowing time based on the timing time, so that the residual heat blowing time is adaptive to the installation state of the indoor unit of the air conditioner, improve the accuracy of air conditioner control and the comfort of use, and realize the function of intelligent air conditioner.

[0062] Figure 1 The present invention shows a flow chart of a first embodiment of a control method for a multi-split air conditioner, specifically, a flow chart of an embodiment of determining the residual heat blowing time of an indoor unit during heating operation. The multi-split air conditioner includes an outdoor unit and multiple indoor units, and the control method of this embodiment is for one of the indoor units.

[0063] like Figure 1 As shown, the control method of this embodiment is implemented using the following process.

[0064] Step 101: When receiving a temperature-reaching shutdown signal of the indoor unit, obtain a first detected temperature and a first indoor temperature.

[0065] A temperature detection device is provided at the return air outlet of the indoor unit to detect the return air temperature of the return air outlet, which is used as the indoor temperature detected by the indoor unit. When the detected temperature meets the temperature reaching shutdown condition, a temperature reaching shutdown signal of the indoor unit is issued. When the temperature reaching shutdown signal of the indoor unit is received, the first detected temperature and the first indoor temperature are obtained.

[0066] The first indoor temperature is a temperature detected and acquired by a temperature detection device provided in the indoor unit, reflecting the indoor temperature.

[0067] The first detected temperature is a temperature that reflects the temperature perceived by the human body in the room where the indoor unit is located. The human-perceived temperature is the temperature that the human body can directly feel, and is generally the temperature of the human activity range in the room, such as the temperature in the lower middle part of the room. The first detected temperature can be detected by a temperature detection device placed in the human activity range in the room. This embodiment does not limit the method for obtaining the first detected temperature. For example, the temperature can be obtained by detecting with a temperature detection device built into the remote control of the indoor unit; or, the temperature can be obtained by setting a temperature detection device at a certain height in the room, which is lower than the installation height of the indoor unit and generally lower than the normal height of a human body, for example, a height position of 1-1.5m in the room; or, the temperature can be obtained by detecting with a temperature detection device set on other electrical equipment placed on the floor of the room.

[0068] Step 102: Correct the first indoor temperature according to the first detected temperature to obtain a corrected indoor temperature.

[0069] The differences in the room structure where the indoor unit of the multi-split air conditioner is installed, the installation position of the indoor unit in the room, the installation method of the indoor unit, etc., will affect the difference between the temperature detected by the return air outlet of the indoor unit and the actual temperature felt by the human body in the room. The first indoor temperature is corrected by the first detected temperature, so that the corrected indoor temperature obtained can overcome the influence of the temperature felt by the human body caused by the difference in the installation status of the indoor unit, thereby improving the accuracy of the judgment and execution of other controls based on the corrected indoor temperature.

[0070] The correction method of correcting the first indoor temperature according to the first detected temperature is not limited in this embodiment, and all correction methods that enable the corrected indoor temperature to overcome the influence of the human body's perceived temperature caused by the difference in the installation status of the indoor unit belong to the protection scope of the present invention.

[0071] Step 103: When the corrected indoor temperature meets the preset residual heat blowing time correction condition, a process of determining the corrected residual heat blowing time is executed.

[0072] The preset residual heat blowing time correction condition is used as a judgment condition for whether to perform the residual heat blowing time correction. It is a known condition and can be a fixed condition or a dynamically variable condition.

[0073] In some embodiments, the preset residual heat blowing time correction condition is: the indoor temperature after correction is greater than the set temperature. The set temperature is the current set temperature of the indoor unit, which is a known value.

[0074] The process of determining the corrected residual heat blowing time is implemented by using the following steps 104 to 106.

[0075] Step 104: The time when the preset residual heat blowing time correction condition is met is used as the timing start time, and the timing is started; during the timing process, the second detected temperature, the second indoor temperature and the inner coil temperature are obtained in real time.

[0076] The second detected temperature is similar to the first detected temperature, and is a temperature that reflects the temperature perceived by a human body in the room where the indoor unit is located. The detection means is the same as the first detected temperature.

[0077] The second indoor temperature is similar to the first indoor temperature, and is a temperature detected and acquired by a temperature detection device provided in the indoor unit, reflecting the indoor temperature.

[0078] The internal coil temperature is the coil temperature of the indoor unit heat exchanger, which can be obtained by detecting the coil temperature detection device on the indoor unit heat exchanger.

[0079] Step 105: Determine a first timing time, a second timing time, and a third timing time.

[0080] The time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the first temperature difference condition and the inner coil temperature meets the preset coil temperature condition is determined as the first timing time.

[0081] The time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the second temperature difference condition and the inner coil temperature does not meet the preset coil temperature condition is determined as the second timing time.

[0082] The time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature satisfies the third temperature difference condition is determined as the third timing time.

[0083] Moreover, the second timing time is greater than the first timing time, and the third timing time is greater than the second timing time.

[0084] For multi-split air conditioners, after the indoor unit reaches the temperature and stops, the indoor temperature detected by the indoor unit goes through a process of first rising and then falling, and the internal coil temperature gradually decreases. Based on this characteristic of the indoor unit, various temperature difference conditions and coil temperature conditions can be determined.

[0085] In some embodiments, the first temperature difference condition includes: the second indoor temperature is lower than the second detection temperature, and the difference between the two temperatures is not less than the first temperature difference threshold. In some other embodiments, the first temperature difference threshold is 0.5°C, and when the second indoor temperature is at least 0.5°C lower than the second detection temperature, it is determined that the first temperature difference condition is met.

[0086] In some embodiments, the preset coil temperature condition includes: the inner coil temperature is greater than the coil temperature threshold. In other embodiments, the coil temperature threshold is 20°C, then when the inner coil temperature is greater than 20°C, it is determined that the inner coil temperature meets the preset coil temperature condition; if the inner coil temperature is less than or equal to 20°C, it is determined that the inner coil temperature does not meet the preset coil temperature condition.

[0087] In some embodiments, the second temperature difference condition includes: the second indoor temperature is higher than the second detection temperature, and the difference between the second indoor temperature and the second detection temperature is not less than the second temperature difference threshold. In some other embodiments, the second temperature difference threshold is 0.3°C, and when the second indoor temperature is at least 0.3°C higher than the second detection temperature, it is determined that the second temperature difference condition is met.

[0088] In some embodiments, the third temperature difference condition includes: the second indoor temperature is lower than the second detection temperature, and the difference between the two temperatures is not less than a third temperature difference threshold. In some other embodiments, the third temperature difference threshold is 0.5°C, and when the second indoor temperature is at least 0.5°C lower than the second detection temperature, it is determined that the third temperature difference condition is met.

[0089] Step 106: When the difference between the third timing time and the second timing time meets the preset time condition, the third timing time is determined as the corrected post-blowing residual heat time; otherwise, the first timing time is determined as the corrected post-blowing residual heat time.

[0090] The preset time condition is a condition parameter for determining the corrected residual heat blowing time, which is a known condition and can be a fixed condition or a dynamically variable condition. In some embodiments, the preset time condition includes: the time difference is greater than the time difference threshold. In some other embodiments, the time difference threshold is 10S. Then, if the difference between the third timing time and the second timing time is greater than 10S, it is determined that the preset time condition is met.

[0091] When the preset time condition is met, it indicates that the room where the indoor unit is located has uneven heat exchange, and the longer third timing time is determined as the corrected residual heat blowing time, and the indoor unit is controlled to blow residual heat for a longer time to avoid the problem of not starting after reaching the temperature. If the preset time condition is not met, it indicates that the room where the indoor unit is located has relatively uniform heat exchange, and the shorter first timing time is determined as the corrected residual heat blowing time to avoid blowing cold air and causing uncomfortable indoor temperature.

[0092] The control method of the multi-split air conditioner provided by this embodiment uses the detection temperature reflecting the temperature perceived by human beings in the room to correct the indoor temperature, and uses the corrected indoor temperature as a judgment parameter for whether to execute the correction of the residual heat blowing time, so as to decide whether to execute the correction of the residual heat blowing time; when correcting the residual heat blowing time, the timing time is determined based on the temperature perceived by human beings in the room, the detection temperature of the indoor unit, and the internal coil temperature of the indoor unit, and the corrected residual heat blowing time is further determined according to the timing time, so that the residual heat blowing time is adaptive to the installation status of the indoor unit of the air conditioner, such as the room structure in which the indoor unit is installed and the installation position of the indoor unit in the room, thereby improving the accuracy of the residual heat blowing time, effectively solving the problems of the indoor unit not starting when the temperature reaches the temperature and blowing cold air when the temperature reaches the temperature caused by the inaccurate residual heat blowing time due to the difference in the installation status of the indoor unit, improving the accuracy and use comfort of controlling the air conditioner based on the residual heat blowing time, and realizing the function of the intelligent air conditioner.

[0093] In some other embodiments, the control method of the multi-split air conditioner further includes:

[0094] After the corrected indoor temperature meets the preset blowing residual heat time correction condition, the fan of the indoor unit is controlled to run at the first preset speed, and the air guide plate of the indoor unit is also controlled to be in a non-blowing position, for example, a horizontal position; after the difference between the second indoor temperature and the second detected temperature meets the first temperature difference condition, and the internal coil temperature meets the preset coil temperature condition, the fan of the indoor unit is controlled to run at the second preset speed. The second preset speed is less than the first preset speed. In some embodiments, the first preset speed is the weak wind speed of the indoor unit, and the second preset speed is the minimum speed of the indoor unit.

[0095] After the difference between the second indoor temperature and the second detected temperature meets the second temperature difference condition and the internal coil temperature does not meet the preset coil temperature condition, the fan of the indoor unit is controlled to stop.

[0096] Figure 2 The flowchart of the second embodiment of the control method of the multi-split air conditioner of the present invention is shown, specifically, it is a flowchart of an embodiment of determining the blowing residual heat time of the indoor unit when the indoor unit is in heating operation. The multi-split air conditioner includes an outdoor unit and multiple indoor units, and the control method of this embodiment is for one of the indoor units.

[0097] like Figure 2 As shown, the control method of this embodiment is implemented using the following process.

[0098] Step 201: When receiving a temperature-reaching shutdown signal of the indoor unit, a first detected temperature and a first indoor temperature are obtained to obtain a corrected indoor temperature.

[0099] How to obtain the corrected indoor temperature, see Figure 1 Description of the corresponding process of the embodiment.

[0100] Step 202: Determine whether the corrected indoor temperature meets the preset residual heat blowing time correction condition. If yes, execute step 204; otherwise, execute step 203.

[0101] For the setting and judgment process of the preset blowing residual heat time correction conditions, see Figure 1 Description of the corresponding process of the embodiment.

[0102] Step 203: Control the indoor unit to perform cold wind prevention control or control the indoor unit to maintain its operating state.

[0103] If the corrected indoor temperature does not meet the preset blowing residual heat time correction condition, the blowing residual heat time correction process is not executed, but the indoor unit is controlled to execute cold wind prevention control or the indoor unit operation state is controlled to be maintained.

[0104] If the preset residual heat blowing time correction condition includes: the corrected indoor temperature is greater than the set temperature. If the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, the corrected indoor temperature is not greater than the set temperature. In this state, when the corrected indoor temperature is less than the set temperature, the indoor unit is controlled to perform cold wind prevention control to increase the indoor unit coil temperature; when the corrected indoor temperature is equal to the set temperature, the indoor unit operation state is controlled to remain, that is, its current operation state is maintained unchanged.

[0105] Step 204: Determine whether there is a corrected post-blowing residual heat time. If yes, go to step 208; otherwise, go to step 205.

[0106] If step 202 determines that the corrected indoor temperature meets the preset residual heat blowing time correction condition, it is further determined whether there is a corrected residual heat blowing time of the indoor unit, and different controls are performed according to the determination result.

[0107] Step 205: Determine whether the received temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition. If yes, execute step 207; if not, execute step 206.

[0108] If step 204 determines that there is no corrected post-blowing residual heat time of the indoor unit, it will be further determined whether the received temperature-reaching shutdown signal meets the preset temperature-reaching shutdown signal condition.

[0109] The preset temperature-reaching shutdown signal condition is used as a judgment condition for whether to perform the correction of the residual heat blowing time, which is a known condition. In some embodiments, the preset temperature-reaching shutdown signal condition includes: receiving the temperature-reaching shutdown signal for the second time after the indoor unit is powered on.

[0110] Step 206: Obtain the initial residual heat blowing time.

[0111] If step 205 determines that the received temperature reaching shutdown signal does not meet the preset temperature reaching shutdown signal condition, the residual heat blowing time is not corrected, but the initial residual heat blowing time is obtained and the initial residual heat blowing time is used to perform residual heat blowing control. The initial residual heat blowing time is a known time.

[0112] When the preset temperature-reaching shutdown signal condition is the second time the temperature-reaching shutdown signal is received after the indoor unit is powered on, if it is determined that the current time is the first time the temperature-reaching shutdown signal is received after the unit is powered on, the residual heat blowing time will not be corrected. Instead, the initial residual heat blowing time will be used to control the residual heat blowing, thereby avoiding problems such as unstable operation of the air-conditioning system caused by the indoor unit starting too quickly due to the indoor unit running time being too short and the indoor room temperature being uneven.

[0113] Step 207: Execute the process of determining the corrected residual heat blowing time.

[0114] If step 205 determines that the received temperature reaching shutdown signal meets the preset temperature reaching shutdown signal condition, the process of determining the corrected residual heat blowing time will be executed. For the specific determination process, see Figure 1 Corresponding description of the embodiment. Moreover, the determined corrected post-blowing residual heat time is saved for direct call at the next temperature-reaching shutdown.

[0115] Step 208: Obtain the corrected residual heat blowing time.

[0116] This step is executed according to the judgment result of step 204. Specifically, if step 204 determines that there is a corrected residual heat blowing time of the indoor unit, the judgment of whether the reaching temperature stop signal meets the preset reaching temperature stop signal condition and the adjustment process of the corrected residual heat blowing time are no longer performed, but the existing corrected residual heat blowing time is directly called as the reaching temperature stop blowing time.

[0117] In this embodiment, combined with the characteristics that the indoor unit in the multi-split air conditioner is fixed in the installation state after installation and basically does not change, for a fixed indoor unit, it is only necessary to perform the adjustment process of the residual heat blowing time adaptive installation state once, and the adjusted corrected residual heat blowing time is saved for automatic call during the subsequent temperature-reaching shutdown. In addition, the correction of the residual heat blowing time is not performed immediately in the first temperature-reaching shutdown cycle after the indoor unit is powered on, but the correction is performed in the second temperature-reaching shutdown cycle or when other preset temperature-reaching shutdown signal conditions are met, so as to avoid the inaccurate correction of the residual heat blowing time, which may cause the unstable operation of the air conditioner system, uncomfortable room temperature, and other problems.

[0118] Figure 3The figure shows a schematic diagram of the structure of an embodiment of the control device of the multi-split air conditioner of the present invention. Specifically, it is a schematic diagram of the structure of an embodiment of determining the blowing residual heat time of the indoor unit during heating operation. The multi-split air conditioner includes an outdoor unit and a plurality of indoor units, and the control device of this embodiment is for one of the indoor units.

[0119] like Figure 3 As shown, the control device of this embodiment includes structural units, functions of the structural units and the relationship between them, which are specifically as follows:

[0120] The control device includes:

[0121] The first detected temperature acquisition unit 301 is used to acquire a first detected temperature reflecting the temperature perceived by a human body in the room where the indoor unit is located when receiving a temperature reaching shutdown signal of the indoor unit.

[0122] The first indoor temperature acquisition unit 302 is used to acquire a first indoor temperature detected by the indoor unit when receiving the indoor unit temperature reaching shutdown signal.

[0123] The corrected indoor temperature acquisition unit 303 is used to correct the first indoor temperature acquired by the first indoor temperature acquisition unit 302 according to the first detected temperature acquired by the first detected temperature acquisition unit 301 .

[0124] The corrected indoor temperature judging unit 304 is used to judge whether the corrected indoor temperature obtained by the corrected indoor temperature obtaining unit 303 satisfies a preset residual heat blowing time correction condition.

[0125] The second detected temperature acquisition unit 305 is used to obtain in real time the second detected temperature reflecting the human body perceived temperature in the room where the indoor unit is located during the process of starting timing from when the corrected indoor temperature judgment unit 304 determines that the corrected indoor temperature meets the preset residual heat blowing time correction condition.

[0126] The second indoor temperature acquisition unit 306 is used to obtain the second indoor temperature detected by the indoor unit in real time during the process of starting the timing when the corrected indoor temperature judgment unit 304 determines that the corrected indoor temperature meets the preset residual heat blowing time correction condition.

[0127] The internal coil temperature acquisition unit 307 is used to obtain the internal coil temperature of the indoor unit in real time during the process of starting the timing when the corrected indoor temperature judgment unit 304 determines that the corrected indoor temperature meets the preset residual heat blowing time correction condition.

[0128] The first timing time determination unit 308 is used to determine the first timing time from the moment when the corrected indoor temperature meets the preset residual heat blowing time correction condition to the moment when the difference between the second indoor temperature and the second detected temperature meets the first temperature difference condition and the internal coil temperature meets the preset coil temperature condition.

[0129] The second timing time determination unit 309 is used to determine the second timing time from the moment when the corrected indoor temperature meets the preset residual heat blowing time correction condition as the timing start time to the time when the difference between the second indoor temperature and the second detection temperature meets the second temperature difference condition and the internal coil temperature does not meet the preset coil temperature condition; the second timing time is greater than the first timing time.

[0130] The third timing time determination unit 310 is used to start timing from the moment when the corrected indoor temperature meets the preset residual heat blowing time correction condition to the time when the difference between the second indoor temperature and the second detected temperature meets the third temperature difference condition, and determine it as the third timing time; the third timing time is greater than the second timing time.

[0131] The corrected rear blowing residual heat time determination unit 311 is used to determine the third timing time as the corrected rear blowing residual heat time when the difference between the third timing time determined by the third timing time determination unit 310 and the second timing time determined by the second timing time determination unit 309 meets the preset time condition; otherwise, determine the first timing time determined by the first timing time determination unit 308 as the corrected rear blowing residual heat time.

[0132] The control device of the above structure runs the corresponding software program and performs the corresponding functions according to Figure 1 , Figure 2 The control method of the multi-split air conditioner of the embodiment and the process of other embodiments are used to control the air conditioner, so as to achieve the same Figure 1 Example Figure 2 The corresponding technical effects of the embodiment and other embodiments.

[0133] The control devices of the above-mentioned embodiments are applied to a multi-split air conditioner, so that the residual heat blowing time can adapt to the installation state of the indoor unit of the air conditioner, thereby improving the accuracy of air conditioner control and the comfort of use, and realizing the function of an intelligent air conditioner.

[0134] Figure 4 The electronic device includes a processor 41, a memory 42, and a computer program 421 stored in the memory 42. The processor 41 is configured to execute the computer program 421 to implement Figure 1 Example Figure 2The control method of the multi-split air conditioner of the embodiment and other embodiments, and the technical effects of the corresponding embodiments are achieved. The electronic device can be a main control board, a controller, etc. of the multi-split air conditioner.

[0135] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A control method for a multi-split air conditioner, characterized in that: The control method comprises: When receiving a temperature-reaching shutdown signal of the indoor unit, obtaining a first detection temperature reflecting the temperature perceived by a human body in the room where the indoor unit is located and a first indoor temperature detected by the indoor unit; the first detection temperature is detected by a temperature detection device placed within the range of human activity in the room; Correcting the first indoor temperature according to the first detected temperature to obtain a corrected indoor temperature; When the corrected indoor temperature meets the preset residual heat blowing time correction condition, the following process of determining the corrected residual heat blowing time is performed: The time when the corrected indoor temperature meets the preset residual heat blowing time correction condition is taken as the timing start time, and the timing starts; During the timing process, a second detected temperature reflecting the temperature perceived by a human body in the room where the indoor unit is located, a second indoor temperature detected by the indoor unit, and an internal coil temperature of the indoor unit are obtained in real time; The time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature satisfies the first temperature difference condition and the inner coil temperature satisfies the preset coil temperature condition is determined as the first timing time; the first temperature difference condition includes: the second indoor temperature is lower than the second detected temperature, and the difference between the second indoor temperature and the second detected temperature is not less than the first temperature difference threshold; the preset coil temperature condition includes: the inner coil temperature is greater than the coil temperature threshold; The time from the timing start time to the time when the difference between the second indoor temperature and the second detection temperature meets the second temperature difference condition and the inner coil temperature does not meet the preset coil temperature condition is determined as the second timing time; the second timing time is greater than the first timing time; the second temperature difference condition includes: the second indoor temperature is higher than the second detection temperature, and the difference between the second indoor temperature and the second detection temperature is not less than a second temperature difference threshold; The time from the timing start time to the time when the difference between the second indoor temperature and the second detected temperature meets the third temperature difference condition is determined as the third timing time; the third timing time is greater than the second timing time; the third temperature difference condition includes: the second indoor temperature is lower than the second detected temperature, and the difference between the second indoor temperature and the second detected temperature is not less than a third temperature difference threshold; When the difference between the third timing time and the second timing time meets a preset time condition, the third timing time is determined to be the corrected post-blowing residual heat time; otherwise, the first timing time is determined to be the corrected post-blowing residual heat time; the preset time condition includes: the time difference is greater than a time difference threshold; The preset residual heat blowing time correction condition includes: the indoor temperature after correction is greater than the set temperature.

2. The control method of a multi-split air conditioner according to claim 1, characterized in that: The method further comprises: After the corrected indoor temperature meets the preset residual heat blowing time correction condition, controlling the fan of the indoor unit to run at a first preset speed; After the difference between the second indoor temperature and the second detected temperature satisfies the first temperature difference condition and the internal coil temperature satisfies the preset coil temperature condition, controlling the fan of the indoor unit to run at a second preset speed; the second preset speed is less than the first preset speed; After the difference between the second indoor temperature and the second detected temperature satisfies the second temperature difference condition and the inner coil temperature does not satisfy the preset coil temperature condition, the fan of the indoor unit is controlled to stop.

3. The control method of a multi-split air conditioner according to claim 1, characterized in that: The method further comprises: When the corrected indoor temperature does not satisfy the preset residual heat blowing time correction condition, the indoor unit is controlled to perform cold wind prevention control or the indoor unit is controlled to maintain an operating state.

4. The control method of a multi-split air conditioner according to claim 3, characterized in that: When the corrected indoor temperature does not meet the preset residual heat blowing time correction condition, controlling the indoor unit to perform the cold wind prevention control or controlling the indoor unit to maintain the operating state includes: When the corrected indoor temperature is lower than the set temperature, controlling the indoor unit to perform the cold wind prevention control; When the corrected indoor temperature is equal to the set temperature, the indoor unit is controlled to maintain its operating state.

5. The control method of a multi-split air conditioner according to any one of claims 1 to 4, characterized in that: When the corrected indoor temperature meets the preset residual heat blowing time correction condition, the process of determining the corrected residual heat blowing time is performed, including: When the corrected indoor temperature meets the preset residual heat blowing time correction condition, determining whether the temperature reaching shutdown signal meets the preset temperature reaching shutdown signal condition; When the temperature-reaching shutdown signal satisfies the preset temperature-reaching shutdown signal condition, the process of determining the corrected post-blowing residual heat time is executed; otherwise, the process of determining the corrected post-blowing residual heat time is not executed.

6. The control method of a multi-split air conditioner according to claim 5, characterized in that: When the corrected indoor temperature meets the preset residual heat blowing time correction condition, judging whether the temperature reaching shutdown signal meets the preset temperature reaching shutdown signal condition includes: When the corrected indoor temperature satisfies the preset residual heat blowing time correction condition, determining whether there is the corrected residual heat blowing time of the indoor unit; When the corrected post-blowing residual heat time of the indoor unit does not exist, it is determined whether the temperature reaching shutdown signal satisfies the preset temperature reaching shutdown signal condition; otherwise, it is not determined whether the temperature reaching shutdown signal satisfies the preset temperature reaching shutdown signal condition.

7. The control method of a multi-split air conditioner according to claim 6, characterized in that: The control method further comprises: When the corrected residual heat blowing time of the indoor unit does not exist and the temperature reaching shutdown signal does not meet the preset temperature reaching shutdown signal condition, the initial residual heat blowing time of the indoor unit is obtained.

8. A control device for a multi-split air conditioner, characterized in that: The control device comprises: A first detected temperature acquisition unit is used to acquire a first detected temperature reflecting the temperature perceived by a human body in the room where the indoor unit is located when receiving a temperature-reaching shutdown signal of the indoor unit; the first detected temperature is detected by a temperature detection device placed within a human activity range in the room; A first indoor temperature acquisition unit, configured to acquire a first indoor temperature detected by the indoor unit upon receiving a temperature reaching shutdown signal of the indoor unit; a corrected indoor temperature obtaining unit, configured to correct the first indoor temperature according to the first detected temperature; A corrected indoor temperature judgment unit is used to judge whether the corrected indoor temperature meets a preset residual heat blowing time correction condition; the preset residual heat blowing time correction condition includes: the corrected indoor temperature is greater than a set temperature; A second detected temperature acquisition unit is used to acquire in real time a second detected temperature reflecting a human body perceived temperature in the room where the indoor unit is located during the process of starting to time the corrected indoor temperature to meet the preset residual heat blowing time correction condition; A second indoor temperature acquisition unit is used to acquire the second indoor temperature detected by the indoor unit in real time during the process of starting the timing from when the corrected indoor temperature meets the preset residual heat blowing time correction condition; An inner coil temperature acquisition unit, used for acquiring the inner coil temperature of the indoor unit in real time during the process of starting the timing from when the corrected indoor temperature meets the preset residual heat blowing time correction condition; A first timing time determination unit is used to determine the first timing time from the time when the corrected indoor temperature meets the preset blowing residual heat time correction condition as the timing start time to the time when the difference between the second indoor temperature and the second detection temperature meets the first temperature difference condition and the inner coil temperature meets the preset coil temperature condition; the first temperature difference condition includes: the second indoor temperature is lower than the second detection temperature, and the difference between the second indoor temperature and the second detection temperature is not less than a first temperature difference threshold; the preset coil temperature condition includes: the inner coil temperature is greater than the coil temperature threshold; A second timing time determination unit is used to determine the time from the time when the corrected indoor temperature meets the preset blowing residual heat time correction condition as the timing start time to the time when the difference between the second indoor temperature and the second detection temperature meets the second temperature difference condition and the inner coil temperature does not meet the preset coil temperature condition as the second timing time; the second timing time is greater than the first timing time; the second temperature difference condition includes: the second indoor temperature is higher than the second detection temperature, and the difference between the second indoor temperature and the second detection temperature is not less than a second temperature difference threshold; A third timing time determination unit is used to determine the time from the time when the corrected indoor temperature meets the preset blowing residual heat time correction condition as the timing start time to the time when the difference between the second indoor temperature and the second detection temperature meets the third temperature difference condition as the third timing time; the third timing time is greater than the second timing time; the third temperature difference condition includes: the second indoor temperature is lower than the second detection temperature, and the difference between the second indoor temperature and the second detection temperature is not less than a third temperature difference threshold; The corrected rear-blowing residual heat time determination unit is used to determine the third timing time as the corrected rear-blowing residual heat time when the difference between the third timing time and the second timing time meets a preset time condition; otherwise, determine the first timing time as the corrected rear-blowing residual heat time; the preset time condition includes: the time difference is greater than a time difference threshold.

9. A multi-split air conditioner, comprising an outdoor unit and a plurality of indoor units, characterized in that: The multi-split air conditioner also includes the control device of the multi-split air conditioner as described in claim 8 above.

10. An electronic device comprising a processor, a memory and a computer program stored in the memory, characterized in that: The processor is configured to execute the computer program to implement the control method of the multi-split air conditioner according to any one of claims 1 to 7.

Images