Control method for duct type air conditioner and duct type air conditioner

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method for a duct type air conditioner and the duct type air conditioner, and aims to solve the problem that an existing duct type air conditioner cannot accurately set the compensation temperature according to the temperature detected by an air return opening. In order to achieve the purpose, the control method for the duct type air conditioner comprises the steps that in at least one temperature adjusting period of multiple indoor units, operation parameters of the multiple indoor units are obtained; if the operation parameters reach the first preset parameters, the indoor unit is controlled to be switched to be in a standby state; the change condition of the first temperature in the air return opening within the first preset time when the indoor unit is switched into the standby state is obtained; and temperature compensation values are selectively set for the multiple indoor units according to the change condition of the first temperature. In this way, the duct type air conditioner can set the temperature compensation values according to the conditions of the multiple partitions, so that the temperatures of the multiple partitions can be at the target temperature, and the use satisfaction degree of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly provides a control method for an air duct machine and an air duct machine. Background Art

[0002] The air duct machine is a new type of machine developed in response to the diverse market demands and the changes in the overall decoration space. It is mostly used in occasions such as multi-story commercial buildings or residential buildings, especially suitable for integral buildings such as office buildings, hotels, and apartments that often use air duct machines to provide centralized temperature control. In the cold winter, people living or working indoors usually use the air duct machine to heat the indoor environment, thereby increasing the indoor ambient temperature. The air duct machine is generally installed at the upper position indoors, so that the temperature sensor installed at the air return opening of the indoor unit of the air duct machine has a deviation from the temperature actually felt by the user, that is, the temperature detected by the temperature sensor is higher than the temperature actually felt by the user. The same is true for the cooling mode, which will not be elaborated here.

[0003] In the prior art, there are two solutions to the above problems. The first one is to extend the air return opening of the air duct machine downward. At this time, the temperature sensor installed at the air return opening is consistent with the user's body sensation temperature. The second one is to set a temperature compensation value for the indoor unit when the air return opening of the air duct machine is installed at the upper part of the room. For example, when the air conditioner operates in the heating mode, the compensation temperature is set to 5°C (or other fixed parameter values). When the temperature set by the user is 26°C, the actual air conditioner operation plan executes at 31°C, and the air conditioner will stop when the local temperature of the air conditioner reaches 31°C. Through such a plan, the hot air above the room will continuously accumulate, and the accumulated hot air will continuously pile downwards, so that the temperature below the room reaches the temperature set by the user.

[0004] However, due to the differences in decoration styles and usage requirements of integral buildings using air duct machines, the air return openings of some rooms are extended downward through external air ducts, while the air return openings of other rooms are arranged at the top. This leads to the problem that the air duct machine cannot accurately set the compensation temperature according to the temperature detected at the air return opening.

[0005] Therefore, there is a need in the art for a new control method for an air duct machine and a corresponding air duct machine to solve the above technical problems. Summary of the Invention

[0006] The present invention aims to solve the above technical problems, that is, to solve the problem that in the case of the air return opening of an integral building using an air duct machine being arranged at the top, the air duct machine cannot accurately set the compensation temperature according to the temperature detected at the air return opening.

[0007] In a first aspect, the present invention provides a control method for an air duct machine, the air duct machine includes an outdoor unit and a plurality of indoor units, the plurality of indoor units are correspondingly arranged for a plurality of zones, and a first temperature sensor is correspondingly arranged in the air return opening of each indoor unit. The method includes:

[0008] During at least one temperature adjustment cycle of the plurality of indoor units, obtain the operating parameters of the plurality of indoor units;

[0009] If the operating parameters reach a first preset parameter, correspondingly control the plurality of indoor units to switch to the standby state;

[0010] Obtain the change situation of the first temperature inside the air return opening within a first preset time since the plurality of indoor units switched to the standby state;

[0011] Selectively set a temperature compensation value for the plurality of indoor units according to the change situation of the first temperature.

[0012] In the preferred technical solution of the above control method for an air duct machine, the step of "selectively setting a temperature compensation value for the plurality of indoor units according to the change situation of the first temperature" includes:

[0013] Obtain the expected value of the change of the first temperature in the direction approaching the initial temperature of the zone within the first preset time;

[0014] If the expected value is less than a preset expected threshold, the temperature compensation value is zero. If the expected value is greater than or equal to the preset expected threshold, set the temperature compensation value.

[0015] In the preferred technical solution of the above control method for an air duct machine, the step of "obtaining the expected value of the change of the first temperature in the direction approaching the initial temperature of the zone within the first preset time" includes:

[0016] If the first temperature changes in the direction approaching the initial temperature of the zone within the first preset time, record that the number of times of event A is incremented by 1, otherwise record that the number of times of event B is incremented by 1;

[0017] Obtain the cumulative number of times of event A and the cumulative number of times of event B of the plurality of indoor units during at least one temperature adjustment cycle;

[0018] Take the ratio of the cumulative number of times of event A to the cumulative number of times of event B as the expected value.

[0019] In the preferred technical solution of the above control method for an air duct machine, after the step of "if the expected value is less than a preset expected threshold, the temperature compensation value is zero", the control method further includes:

[0020] Between running one heating cycle to the next heating cycle for multiple indoor units, if it is detected that multiple zones still remain at the target temperature after exceeding the second preset time, and the first temperature is higher than the first preset temperature threshold, then control the indoor unit to blow air at a low wind speed for a fourth preset time every third preset time;

[0021] During the process of blowing air at a low wind speed, obtain the second temperature inside the return air duct. If the second temperature is lower than the target temperature, then control the indoor unit to enter the temperature adjustment cycle.

[0022] In the preferred technical solution of the above control method for an air duct machine, after the step of "if the expected value is greater than or equal to the preset expected threshold, then set the temperature compensation value", the control method further includes:

[0023] In the next heating cycle, based on the temperature compensation value, control the indoor unit corresponding to which the temperature compensation value is set to perform temperature adjustment work.

[0024] In the preferred technical solution of the above control method for an air duct machine, after the step of "if the expected value is greater than or equal to the preset expected threshold, then set the temperature compensation value", the control method further includes:

[0025] The temperature compensation value is modified manually.

[0026] In the preferred technology of the above control method for an air duct machine, after the step of "if the expected value is greater than or equal to the preset expected threshold, then set the temperature compensation value", the control method further includes:

[0027] When the indoor unit is about to end the temperature adjustment work, control multiple indoor units to be connected to a mobile terminal located in the zone through a network;

[0028] Control the mobile terminal with temperature measurement function to obtain the actual temperature in the zone;

[0029] Adjust the temperature compensation value according to the difference between the third temperature detected by the first temperature sensor and the actual temperature.

[0030] In the preferred technical solution of the above control method for an air duct machine, the operating parameters include:

[0031] The temperature on the surface of the heat exchanger inside the indoor unit; or

[0032] The duration of continuous temperature adjustment work of the indoor unit.

[0033] In the preferred technical solution of the above control method for an air duct machine, the target temperature is the required temperature set by the user.

[0034] In a second aspect, the present invention further provides an air duct machine, which includes a controller configured to execute the above control method for the air duct machine.

[0035] In the case of adopting the above technical solution, the air duct machine of the present invention includes an outdoor unit and a plurality of indoor units connected to the outdoor unit. The plurality of indoor units are respectively arranged in a plurality of partitions so that the air duct machine can independently control the temperature of the plurality of partitions. Moreover, the present invention can also set the temperature compensation values for the plurality of partitions correspondingly by detecting the temperature changes at the return air openings of the plurality of indoor units of the air duct machine within at least one temperature adjustment cycle. In this way, the air duct machine of the present invention can set the temperature compensation values according to the conditions of the plurality of partitions respectively, so that the temperatures of the plurality of partitions can be respectively at the target temperatures, thereby improving the user's satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings, in which:

[0037] Figure 1 is a schematic installation structure diagram of the air duct machine of the present invention;

[0038] Figure 2 is a main flowchart of the control method for the air duct machine of the present invention;

[0039] Figure 3 is a flowchart of setting the temperature compensation value of the control method for the air duct machine of the present invention;

[0040] Figure 4 is a flowchart of obtaining the expected value of the control method for the air duct machine of the present invention;

[0041] Figure 5 is a flowchart of the control method after setting the temperature compensation value to zero in the control method for the air duct machine of the present invention;

[0042] Figure 6 is a flowchart of the control method after setting the temperature compensation value not to zero in the control method for the air duct machine of the present invention;

[0043] Figure 7 is a flowchart of manually adjusting the temperature compensation value in the control method for the air duct machine of the present invention;

[0044] Figure 8 is a flowchart of automatically adjusting the temperature compensation value in the control method for the air duct machine of the present invention.

[0045] List of reference numerals:

[0046] 100, Air duct unit; 1, Outdoor unit; 2, Indoor unit; 3, Air duct; 31, Return air inlet; 32, First temperature sensor; 33, Air inlet. Detailed implementation manner

[0047] The preferred implementation manners of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. For example, although the following embodiments describe each step in a sequential order. However, those skilled in the art can understand that in order to achieve the effects of this embodiment, different steps do not have to be executed in such an order, and they can be executed simultaneously (in parallel) or in a reversed order, and these simple changes are all within the protection scope of the present application.

[0048] Figure 1 It is a structural block diagram of an embodiment of the air duct unit 100 of the present invention. As Figure 1 shown, in the present invention, the air duct unit 100 includes an outdoor unit 1, an indoor unit 2 and a first temperature sensor 32. The outdoor unit 1 is arranged on the outside of the building. The indoor unit 2 is arranged inside the building. Specifically, when the present invention is specifically implemented, there are multiple rooms inside the building, and moreover, there may be multiple indoor units 2 installed inside one room. Here, the temperature range controlled by one indoor unit 2 is called a partition, that is, in the present invention, multiple indoor units 2 are arranged in one-to-one correspondence with multiple partitions. A first temperature sensor 32 is arranged in the return air inlet 31 of the air duct 3 of each indoor unit 2 for detecting the temperature inside the return air inlet 31. It should be noted that during the specific implementation process of the present application, no temperature sensor is arranged at the air inlet 33 of the air duct 3, but this is not restrictive. In other implementation manners of the present application, a temperature sensor can also be arranged at the air inlet 33.

[0049] In the present invention, the indoor unit 2 is also configured with a second temperature sensor (not shown), and this second temperature sensor is used to detect the surface temperature of the heat exchanger (not shown) in the indoor unit 2, so that the air duct unit 100 can obtain the surface temperature of the heat exchanger in the indoor unit 2 through the second temperature sensor.

[0050] In the present invention, the air duct unit 100 further includes a control module (not shown), and this control module is connected to the outdoor unit 1, the indoor unit 2, the first temperature sensor 32 and the second temperature sensor, so that the air duct unit 100 can obtain the temperatures of multiple indoor partitions through the first temperature sensor 32, and obtain the surface temperatures of the heat exchangers in the indoor units 2 corresponding to the multiple partitions through the second temperature sensor, so that the control module of the air duct unit 100 controls the operation of the outdoor unit 1 and the indoor unit 2 by obtaining the temperature of the return air inlet 31 of the indoor unit 2 and the surface temperature of the heat exchanger, so as to realize the separate control of the temperatures of multiple partitions inside the building.

[0051] It should be noted that although the control module described above controls the temperature of the indoor zones by obtaining the temperature inside the return air opening 31 of the indoor unit 2 and the temperature of the heat exchanger in the indoor unit 2, this is not restrictive. In other embodiments of the present invention, the present invention can also control the temperature of the zones by obtaining the temperature inside the return air opening 31 of the indoor unit 2 and the operation duration of the indoor unit. In addition, the temperature of the return air opening 31 of the indoor unit 2 and the temperature of the heat exchanger in the indoor unit 2 can be obtained in real time or in an intermittent manner.

[0052] Next, with reference to Figures 2 - 8 the possible implementation manners of the control method for the air duct machine of the present invention will be described.

[0053] As Figure 2 shown, in a possible implementation manner, the control method of the present invention includes the following steps:

[0054] S100: Obtain the operation parameters of multiple indoor units within at least one temperature adjustment cycle of the multiple indoor units;

[0055] S101: If the operation parameters reach the first preset parameter, control the indoor unit to switch to the standby state;

[0056] S102: Obtain the change situation of the first temperature inside the return air opening within the first preset time since the indoor unit switches to the standby state;

[0057] S103: Selectively set the temperature compensation value for the multiple indoor units according to the change situation of the first temperature.

[0058] In S100, during at least one temperature adjustment cycle of multiple indoor units, the operating parameters of the multiple indoor units are obtained. Here, the temperature adjustment cycle ends when the temperature of the zone where each indoor unit is located reaches the target temperature starting from the start of the temperature adjustment work for each indoor unit among the multiple indoor units. It should be noted that due to differences in factors such as the location, spatial size, internal decoration style, and height of each zone, the temperature adjustment cycles will also be different. That is, in the present invention, the temperature adjustment cycles of each zone will vary due to the differences in the above factors. Therefore, the temperature adjustment cycles of each zone in the present invention are also different. Thus, in the specific implementation process of the present invention, due to seasonal changes, the outdoor temperature will also change, and at this time, the temperature adjustment cycle will also change. Therefore, during the temperature adjustment work of the present invention, the operating parameters of the indoor unit within one temperature adjustment cycle can be obtained, or the operating parameters of the indoor unit within multiple temperature adjustment cycles can be obtained. Among them, the operating parameter can be the duration for which the indoor unit continuously performs temperature adjustment work. The specific duration for which the indoor unit continuously performs temperature adjustment work is the duration during which the indoor unit continuously cools or heats during the temperature adjustment cycle of the indoor unit. If, during the temperature adjustment work process, the duration for which the indoor unit continuously cools or heats reaches the standard of the operating parameter, then the indoor unit is controlled to switch to the standby state. And, if the indoor unit then switches from the standby state to the temperature adjustment working state again, the duration for which the indoor unit continuously performs temperature adjustment work is recalculated so that the indoor unit can switch the temperature adjustment working state at least once within one temperature adjustment cycle. The operating parameter can also be the surface temperature of the heat exchanger in the indoor unit obtained through the second temperature sensor.

[0059] In S101, if it is detected that the operating parameters reach the first preset parameters, the indoor unit is controlled by the control module to switch to the standby state. Specifically, when the operating parameter is the duration of the indoor unit continuously performing temperature adjustment work, the first preset parameter can be 20 minutes to 40 minutes. Or, when the operating parameter is the surface temperature of the heat exchanger inside the indoor unit, if the temperature adjustment work is in the heating mode, the first preset parameter can be 50°C to 70°C; if the temperature adjustment work is in the cooling mode, the first preset parameter can be 1°C to 10°C. It should be noted that when the air duct unit is in the cooling mode, the temperature of the heat exchanger inside the indoor unit is much lower than the indoor temperature. Therefore, when the indoor hot air meets the indoor unit housing and the air duct of the indoor unit during cooling by the air duct unit, water will condense on the surfaces of the indoor unit housing and the air duct. To solve the above problem, the present invention wraps thermal insulation structures (not shown) around the outside of the indoor unit housing and the outside of the air duct. Moreover, if the return air openings of the indoor units in some partitions are arranged to extend downward, a thermal insulation structure will also be wrapped around the outside of the pipe extending downward. This is the case even if the pipe is buried in the wall, except when the wall itself is made of thermal insulation material. By setting it in this way, when the air duct unit is in the cooling mode, there will be no condensate on the indoor unit housing and the outside of the extended pipe, thus avoiding the corrosion of the indoor unit housing and the outer wall of the pipe caused by water vapor condensation on the housing and the outside of the pipe. At the same time, it can also improve the accuracy of the internal temperature of the return air opening detected by the first temperature sensor.

[0060] In S102, within the first preset time starting from when the indoor unit switches to the standby state during the temperature adjustment cycle, the first temperature sensor continuously obtains the first temperature inside the return air opening in real time and sends it to the control module, and the control module records the change of this first temperature within the first preset time. If the indoor temperature does not reach the target temperature before the indoor unit switches to the standby state, then when the standby duration of the indoor unit reaches the first preset time, the control module controls the indoor unit to switch from the standby state to the temperature adjustment working state. The above process continues until the indoor temperature reaches the target temperature. Among them, the target temperature is the required temperature set by the user. Specifically, it can be the required temperature input by the user to the air conditioner through a mobile phone, a tablet computer, or the required temperature input by the user to the air conditioner through a remote control, or the required temperature input by other devices to the air conditioner, etc.

[0061] Specifically, during the specific implementation of the present invention, during a temperature adjustment cycle, the indoor unit may switch to the standby state once, or may switch to the standby state multiple times. It is also possible that the indoor unit does not switch to the standby state during a temperature adjustment cycle. Then, when the indoor unit does not switch to the standby state during a temperature adjustment cycle, the control module adjusts the value of the first preset parameter by itself so that the indoor unit switches to the standby state during the next temperature adjustment cycle. The specific adjustment process will not be elaborated here. As long as the change of the first temperature obtained by the adjusted value of the first preset parameter can be accurately reflected by the air duct unit. For example, when the indoor unit is in the heating mode, if the operating parameters of the indoor unit reach the first preset operating parameters and switch to the standby state, within the first preset time starting from the moment when the indoor unit switches to the standby state by itself, it is accurate that the internal temperature of the return air outlet detected by the first temperature sensor arranged in the downward-extending return air outlet does not drop. The same applies to the cooling mode and will not be elaborated here.

[0062] It should be noted that the first preset time can be determined according to specific requirements as long as the air duct unit can distinguish the change of the first temperature inside the return air outlet through the set first preset time. For example, the range of the first preset time is 5 min - 15 min. In the embodiment of the present invention, the duration of the first preset time is 10 min.

[0063] In S103, the temperature compensation value is selectively set for multiple indoor units according to the change of the first temperature. In this way, the set temperature value of the indoor unit in multiple indoor units can be targeted to improve the user's satisfaction.

[0064] As Figure 3 shown, in a possible implementation manner, step S103 specifically includes the following steps:

[0065] S200: Obtain the expected value of the change of the first temperature in the direction close to the initial temperature of the partition within the first preset time;

[0066] S201: If the expected value is less than the preset expected threshold, the temperature compensation value is zero. If the expected value is greater than or equal to the preset expected threshold, the temperature compensation value is set.

[0067] In S200, obtain the expected value of the change in the first temperature inside the return air outlet in the first preset time when the indoor unit switches to the standby state during at least one temperature adjustment cycle. For example, during a temperature adjustment cycle when the indoor unit is in the heating mode, obtain the expected value of the decrease in the internal temperature of the return air outlet in the first preset time when the indoor unit switches to the standby state. Or, during a temperature adjustment cycle when the indoor unit is in the cooling mode, obtain the expected value of the increase in the internal temperature of the return air outlet in the first preset time when the indoor unit switches to the standby state.

[0068] In S201, if the expected value is less than the preset expected threshold, do not set a temperature compensation value for the indoor units in the corresponding zone; if the expected value is greater than or equal to the preset expected threshold, set a temperature compensation value for the indoor units in the corresponding zone.

[0069] It should be noted that the principle of the present invention is to utilize the difference in the heat preservation performance between the top-mounted return air outlet of the indoor unit and the downward-extending return air outlet to judge whether the indoor units in the zone are provided with downward-extending return air outlets. Specifically, taking the indoor unit in the heating mode as an example, when the indoor unit adopts the top-mounted return air outlet, the distance between the air inlet and the return air outlet of the indoor unit is relatively close and in the same plane, so that even if the indoor unit and the air duct are externally wrapped with a heat preservation structure, the heat in the indoor unit and the air duct can be dissipated relatively quickly through the air inlet and the air outlet. In this way, when the operating parameters of the indoor unit reach the first preset parameters and then switch to the standby state, the heat exchanger in the indoor unit exchanges heat with the air in the air duct and is dissipated quickly through the air inlet and the return air outlet, so that the temperature in the air duct can be reduced during the first preset time when the indoor unit switches to the standby state. And when the return air outlet of the indoor unit adopts the downward-extending setting method, the distance between the air inlet and the return air outlet of the indoor unit is relatively far, and the air duct of the indoor unit is in an L-shaped structure. Also, because the air duct is externally wrapped with a heat preservation structure, the hot air in the air duct cannot be dissipated quickly through the air inlet and the return air outlet of the indoor unit, so that the temperature in the air duct can rise or remain unchanged after the first preset time when the indoor unit switches to the standby state. Similarly, when the indoor unit is in the cooling mode, the heat exchange speed between the downward-extending return air outlet of the indoor unit and the air is also faster than that of the top-mounted return air outlet. Based on this principle, the present invention judges the setting form of the return air outlet of the indoor unit by measuring the temperature change inside the return air outlet during the first preset time when switching to the standby state, and then judges whether to set a temperature compensation for the indoor units in the zone.

[0070] As Figure 4 shown, as a possible implementation manner, step S200 specifically includes the following steps:

[0071] S300: If the first temperature within the first preset time changes in the direction approaching the initial temperature of the partition, then the count of event A is incremented by 1; otherwise, the count of event B is incremented by 1.

[0072] S301: Obtain the cumulative count of event A and the cumulative count of event B for multiple indoor units within at least one temperature adjustment cycle.

[0073] S302: Use the ratio of the cumulative count of event A to the cumulative count of event B as the expected value.

[0074] In S300, within the first preset time since multiple indoor units switch to the standby state, if the temperature inside the return air vent changes in the direction approaching the initial temperature within the partition, then the count of event A is incremented by 1; otherwise, the count of event B is incremented by 1. For example, when the air conditioner is in the heating mode, within the first preset time since the indoor unit switches to the standby state, if the temperature inside the return air vent decreases, then the count of event A is incremented by 1; otherwise, the count of event B is incremented by 1. Or, when the air conditioner is in the cooling mode, within the first preset time since the indoor unit switches to the standby state, if the temperature inside the return air vent increases, then the count of event A is incremented by 1; otherwise, the count of event B is incremented by 1. Additionally, if the indoor unit simultaneously has the cooling mode and the heating mode within at least one temperature adjustment cycle, the counts of event A and event B are calculated through the above process simultaneously.

[0075] In S302, use the ratio of the cumulative count of event A to the cumulative count of event B as the expected value. At this time, the value of the preset expected threshold is 1. In this way, when the expected value is greater than 1, it indicates that during the temperature adjustment cycle of the indoor unit, after the indoor unit switches to the standby state, the probability that the temperature inside the return air vent of the indoor unit changes in the direction approaching the initial temperature of the partition is relatively high. This indicates that the possibility of the indoor unit in this partition using a top-mounted return air vent is relatively high. At this time, it can be determined that the return air vent of the indoor unit is top-mounted; otherwise, it is determined that the return air vent of the indoor unit extends downward.

[0076] It should be noted that the cumulative count of event A and the cumulative count of event B can be for one temperature adjustment cycle, or two or more temperature adjustment cycles. Of course, the more the number of temperature adjustment cycles, the more accurate the expected value calculated through the cumulative count of event A and the cumulative count of event B, so as to make the obtained change situation of the first temperature inside the return air vent within the first preset time more accurate.

[0077] As Figure 5 shown, as a possible implementation manner, after step S201, the following steps are further included:

[0078] S400: Between the end of one heating cycle and the start of the next heating cycle when multiple indoor units are operating, if it is detected that the first temperature inside the return air vents of the multiple indoor units remains at the target temperature after exceeding the second preset time and the first temperature is higher than the first preset temperature threshold, then control the indoor units to blow air at a low wind speed for the fourth preset time every third preset time.

[0079] S401: During the process of blowing air at a low wind speed, obtain the second temperature inside the return air vent. If the second temperature is lower than the target temperature, then control the indoor unit to enter the temperature adjustment cycle.

[0080] In S400, when the return air vents of the indoor units are arranged in a downward extension manner, since the air conditioner is in the heating mode, the temperature of the heat exchanger of the indoor unit is approximately between 50°C and 70°C, that is, the surface temperature of the heat exchanger is much higher than the temperature in the area. In this case, even after the indoor unit switches to the standby state, the heat of the heat exchanger will still be transferred to the air in the air duct, causing the heat of the air in the air duct to rise. Also, because hot air has a lower density, this will cause the hotter air in the air duct to gather above the air duct and make the cooler air flow downward. And since the return air vents of the indoor units are arranged in a downward extension manner, this will cause the hotter air in the air duct to only flow out from the air outlet preferentially. Since the outflow speed is slow and the outer shell of the indoor unit and the outside of the air duct are wrapped with a heat insulation structure, this will make the heat dissipation speed of the heat in the air duct even slower, and then cause the hot air to also gather at the return air vent of the air duct, thus making the temperature of the air inside the return air vent rise, and even the temperature may be higher than the target temperature. This will affect the accuracy of the first temperature sensor installed in the return air vent to measure the temperature. At this time, in order to reduce the influence of the heat of the heat exchanger on the temperature detection accuracy at the return air vent, control the indoor unit in the standby state to blow air at a low wind speed, so that the air in the area will flow into the return air vent, so that the first temperature sensor installed at the return air vent can detect the temperature of the indoor air, effectively avoiding the influence of the surface temperature of the heat exchanger.

[0081] In addition, the second preset time can be determined according to specific requirements, as long as the temperature in the partition where the indoor unit is located can reach the target temperature through the set second preset time. For example, the range of the second preset time is 5 min - 15 min. In the embodiment of the present invention, the duration of the second preset time is 10 min. Similarly, the third preset time can also be determined according to specific requirements, as long as the third preset time is less than the second preset time, so that the indoor unit can blow air at a low wind speed in an intermittent manner within the second preset time. Similarly, the fourth preset time can also be determined according to specific requirements, as long as the first temperature sensor arranged at the air return opening can detect the air in the partition through the set fourth preset time. For example, the range of the fourth preset time is 30 s - 1 min.

[0082] In S401, during the process of the indoor unit blowing air at a low wind speed, the second temperature of the air inside the air return opening is obtained through the first temperature sensor. If the second temperature is lower than the target temperature, it means that the temperature of the air in the human height range is lower than the target temperature at this time. In this case, the indoor unit needs to enter the next temperature adjustment working cycle to ensure that the air in the human height range can be kept at the target temperature as much as possible, so that the human body can be in a relatively comfortable living environment and the user satisfaction can be improved.

[0083] As Figure 6 shown, as a possible implementation manner, after the step of setting the temperature compensation value when the expected value is greater than or equal to the preset expected threshold, the control method further includes the following steps:

[0084] S500: In the next heating cycle, based on the temperature compensation value, control the indoor unit corresponding to which the temperature compensation value is set to perform temperature adjustment work.

[0085] In S500, when the expected value is greater than or equal to the preset expected threshold, it means that in this temperature adjustment cycle, it is judged that the air return opening of the indoor unit adopts the top-mounted method. At this time, it is necessary to set temperature compensation for the indoor unit in this partition and control the indoor unit to perform temperature adjustment control on the partition in the next temperature adjustment cycle in combination with the set temperature compensation value, so that the temperature in the human height range in the partition is at the target temperature.

[0086] As Figure 7 shown, as a possible implementation manner, after the step of setting the temperature compensation value when the expected value is greater than or equal to the preset expected threshold, the control method further includes the following steps:

[0087] S600: The temperature compensation value is modified manually.

[0088] In S600, during the long-term operation of the indoor unit, if the user feels that the temperature in the partition is not the comfortable temperature for themselves after the temperature adjustment cycle of the indoor unit ends, the user can manually modify it. The modification method can be to manually adjust by increasing or decreasing the temperature compensation value.

[0089] As Figure 8 shown, as a possible implementation manner, after the step of setting the temperature compensation value when the expected value is greater than or equal to the preset expected threshold, the control method further includes the following steps:

[0090] S700: When the indoor unit is about to end the temperature adjustment work, control multiple indoor units to connect to the mobile terminals located in the partition through the network.

[0091] S701: Control the mobile terminal with temperature measurement function to obtain the actual temperature in the partition;

[0092] S702: Adjust the temperature compensation value according to the difference between the third temperature detected by the first temperature sensor and the actual temperature.

[0093] In S701, the mobile terminal with temperature measurement function can be a product such as a mobile phone, a watch, a tablet computer or a smart temperature sensor placed within the human height range.

[0094] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0095] It should be noted that although the detailed steps of the method of the present application are described in detail above, on the premise of not deviating from the basic principle of the present application, those skilled in the art can combine, split and change the order of the above steps. The technical solutions modified in this way do not change the basic concept of the present application, so they also fall within the protection scope of the present application.

[0096] So far, the technical solutions of the present invention have been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. On the premise of not deviating from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A control method for an air duct machine, characterized in that, The air duct machine includes an outdoor unit and multiple indoor units. The multiple indoor units are set corresponding to multiple zones. A first temperature sensor is correspondingly arranged in the air return opening of each indoor unit. The method includes: During at least one temperature adjustment cycle of the multiple indoor units, obtain the operating parameters of the multiple indoor units; If the operating parameters reach the first preset parameters, control the multiple indoor units to switch to the standby state; Obtain the change situation of the first temperature inside the air return opening within the first preset time since the multiple indoor units switched to the standby state; Selectively set a temperature compensation value for the multiple indoor units according to the change situation of the first temperature.

2. The control method according to claim 1, wherein The step of "selectively setting a temperature compensation value for the multiple indoor units according to the change situation of the first temperature" includes: Obtain the expected value of the change of the first temperature in the direction approaching the initial temperature of the zone within the first preset time; If the expected value is less than the preset expected threshold, the temperature compensation value is zero. If the expected value is greater than or equal to the preset expected threshold, set the temperature compensation value.

3. The control method according to claim 2, wherein The step of "obtaining the expected value of the change of the first temperature in the direction approaching the initial temperature of the zone within the first preset time" includes: If the first temperature changes in the direction approaching the initial temperature of the zone within the first preset time, record that the number of times of event A is increased by 1, otherwise record that the number of times of event B is increased by 1; Obtain the cumulative number of times of event A and the cumulative number of times of event B of the multiple indoor units during at least one temperature adjustment cycle; Take the ratio of the cumulative number of times of event A to the cumulative number of times of event B as the expected value.

4. The control method according to claim 2, wherein After the step of "if the expected value is less than the preset expected threshold, the temperature compensation value is zero", the control method further includes: Between one heating cycle and the next heating cycle of the multiple indoor units, if it is detected that the multiple zones are still at the target temperature after exceeding the second preset time, and the first temperature is higher than the first preset temperature threshold, then control the indoor units to blow air at a low wind speed for the fourth preset time every third preset time; During the process of blowing air at a low wind speed, obtain the second temperature inside the air return opening. If the second temperature is lower than the target temperature, control the indoor unit to enter the temperature adjustment cycle.

5. The control method according to claim 2, wherein After the step of "if the expected value is greater than or equal to the preset expected threshold, set the temperature compensation value", the control method further includes: In the next heating cycle, control the indoor unit corresponding to which the temperature compensation value is set to perform temperature adjustment work based on the temperature compensation value.

6. The control method according to claim 2, wherein After the step of "if the expected value is greater than or equal to the preset expected threshold, set the temperature compensation value", the control method further includes: The temperature compensation value is modified manually.

7. The control method according to claim 2, wherein After the step of "if the expected value is greater than or equal to the preset expected threshold, set the temperature compensation value", the control method further includes: When the indoor unit is about to end the temperature adjustment work, control the multiple indoor units to connect to a mobile terminal located in the zone through the network; Control the mobile terminal with a temperature measurement function to obtain the actual temperature within the partition; Adjust the temperature compensation value according to the difference between the third temperature detected by the first temperature sensor and the actual temperature.

8. The control method according to claim 1, characterized in that The operating parameters include: The temperature of the surface of the heat exchanger inside the indoor unit; or The duration of continuous temperature adjustment operation of the indoor unit.

9. The control method according to any one of claims 1-8, characterized in that The target temperature is the required temperature set by the user.

10. An air duct machine, characterized in that, The air duct machine includes a controller configured to be able to execute the control method according to any one of claims 1 to 9.

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