Air conditioner indoor unit, air conditioner and control method

Abstract

The invention relates to the technical field of air conditioners, and provides an air conditioner indoor unit, an air conditioner and a control method. The machine shell comprises a first air inlet, a second air inlet and an air outlet. An inlet of the heat exchange module communicates with the first air inlet. A first inlet of the mixing air bellow communicates with an outlet of the heat exchange module, and a second inlet of the mixing air bellow communicates with the second air inlet; an outlet of the mixing air box communicates with the air outlet. The air inducing assembly comprises an air inducing door which is arranged at the second air inlet in an openable and closable manner; in the operation process of the air conditioner, indoor air enters from the first air inlet, is cooled by the heat exchange module and then enters the mixing air box, and meanwhile, the indoor air directly enters the mixing air box through the second air inlet; the two air flows are mixed in the mixing air bellow, so that the temperature of mixed air at the outlet of the mixing air bellow is increased, the condensation phenomenon generated at the air outlet is avoided, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, especially to an air conditioner indoor unit, an air conditioner and a control method. BACKGROUND

[0002] In modern family life, as a widely used environmental conditioning device, the main function of the air conditioner is to heat or cool the indoor air to effectively regulate the indoor temperature and improve the comfort of the living environment. With the improvement of people's living standards and the increasing demand for indoor air quality, the air conditioner has gradually become an indispensable important appliance in the family environment, which not only plays a key role in extreme weather conditions, but also has important significance in improving the living environment and protecting human health.

[0003] At present, when the air conditioner runs for a long time, condensation is easy to occur at the outlet of the indoor unit, and the condensed water gathers at the edge of the guide plate of the outlet. When accumulated to a certain extent, water droplets will form and fall, affecting the user's experience. SUMMARY

[0004] The present application provides an air conditioner indoor unit, an air conditioner and a control method to solve the defect that the outlet is easy to produce condensed water during cooling operation in the prior art, which affects the user's experience.

[0005] The present application provides an air conditioner indoor unit, comprising: A cabinet including a first air inlet, a second air inlet and an air outlet; A heat exchange module is arranged in the cabinet, and the inlet of the heat exchange module is communicated with the first air inlet; A mixed air box is arranged in the cabinet, the mixed air box includes a first inlet and a second inlet, the first inlet is communicated with the outlet of the heat exchange module, and the second inlet is communicated with the second air inlet; the outlet of the mixed air box is communicated with the air outlet; An air guide assembly, the air guide assembly includes an air guide door which is arranged in the second air inlet and can be opened and closed.

[0006] According to the air conditioner indoor unit provided by the present application, further comprising: A first sensor is arranged at the outlet of the heat exchange module; A controller is electrically connected with the first sensor and the air guide door, respectively, and the controller is used to control the air guide door to open or close based on the outlet temperature detected by the first sensor.

[0007] According to the air conditioner indoor unit provided by the present application, further comprising: A second sensor is electrically connected to the controller, and the second sensor is configured to detect indoor environment information.

[0008] The air conditioner indoor unit further comprises: A third sensor is electrically connected to the controller, and the third sensor is configured to detect a mixed air temperature of the air outlet.

[0009] The air conditioner indoor unit further comprises:

[0010] The air conditioner indoor unit further comprises: determining a dew point temperature of an indoor environment; judging whether the air outlet is at risk of condensation based on an outlet air temperature and the dew point temperature; controlling the air guide door to open the second air inlet to introduce indoor air into the mixed air box through the second air inlet when the air outlet is at risk of condensation.

[0011] The air conditioner indoor unit further comprises: obtaining an outlet air temperature of the heat exchange module; determining that the air outlet is at risk of condensation when a temperature difference between the dew point temperature and the outlet air temperature is greater than or equal to a preset value.

[0012] The air conditioner indoor unit further comprises: obtaining a mixed air temperature of the air outlet; determining a mixing ratio based on an indoor temperature, the mixed air temperature and the outlet air temperature; determining an air volume of the second air inlet based on the mixing ratio and an air volume of the first air inlet; adjusting an opening degree of the air guide door based on the air volume of the second air inlet.

[0013] The air conditioner indoor unit further comprises: determining a first difference between the indoor temperature and the mixed air temperature; determining a second difference between the indoor temperature and the outlet air temperature; determining a mixing ratio as a ratio of the first difference to the second difference.

[0014] The application further provides an air conditioner, comprising the indoor air conditioner as described in any one of the above.

[0015] The indoor air conditioner provided by the application has the first air inlet and the second air inlet arranged on the shell, the first air inlet is communicated with the heat exchange module, the heat exchange module is connected to the first inlet of the mixed air box, and the second air inlet is directly communicated with the second inlet of the mixed air box. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 Fig. 1 is a structural schematic diagram of the indoor air conditioner provided by the application.

[0018] Figure 2 Fig. 1 is a structural schematic diagram of the indoor air conditioner provided by the application.

[0019] Figure 3 Fig. 1 is a structural schematic diagram of the indoor air conditioner provided by the application.

[0020] Figure 4 Fig. 1 is a structural schematic diagram of the indoor air conditioner provided by the application.

[0021] Figure 5 Fig. 1 is a structural schematic diagram of the indoor air conditioner provided by the application.

[0022] Figure 6 Fig. 1 is a structural schematic diagram of the indoor air conditioner provided by the application.

[0023] Figure 7 Fig. 1 is a structural schematic diagram of the indoor air conditioner provided by the application.

[0024] REFERENCE NUMERALS: 10, shell; 11, first air inlet; 12, second air inlet; 13, air outlet; 20, heat exchange module; 30, mixing wind box; 31, first inlet; 32, second inlet; 41, air intake door. DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0026] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the present application and simplify the description, and thus cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0029] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0030] The embodiment of the first aspect of the present invention provides an air conditioner indoor unit, such as Figure 1 As shown, the air conditioner indoor unit includes a casing 10, a heat exchange module 20, a mixing air box 30 and an air induction component.

[0031] Among them, the casing 10 includes a first air inlet 11, a second air inlet 12 and an air outlet 13; the heat exchange module 20 is arranged in the casing 10, and the inlet of the heat exchange module 20 is connected to the first air inlet 11; the mixing air box 30 is arranged in the casing 10, and the mixing air box 30 includes a first inlet 31 and a second inlet 32, the first inlet 31 is connected to the outlet of the heat exchange module 20, and the second inlet 32 ​​is connected to the second air inlet 12; the outlet of the mixing air box 30 is connected to the air outlet 13; the air induced component includes an air induced door 41, and the air induced door 41 is openably and closably arranged at the second air inlet 12.

[0032] It can be understood that the casing 10 is provided with a first air inlet 11 and an air outlet 13, and the heat exchange module 20 is arranged in the casing 10. The indoor air enters the casing 10 through the first air inlet 11, and is directly blown into the room through the air outlet 13 after being cooled by the heat exchange module 20; when the air conditioner is in long-term cooling operation, condensation is generated at the air outlet 13 due to the contact between the low-temperature airflow and the surrounding hot and humid air. The condensation water gathers at the edge of the guide plate of the air outlet 13. When it accumulates to a certain extent, water droplets will form and drip, affecting the user experience. Based on this, the present invention sets a mixing air box 30 in the casing 10, and the mixing air box 30 includes two inlets, namely a first inlet 31 and a second inlet 32. The first inlet 31 of the mixing air box 30 is connected to the outlet of the heat exchange module 20, and a second air inlet 12 connected to the second inlet 32 ​​is provided on the casing 10, and an air induced draft component is provided at the second air inlet 12. The air induced draft component includes an air induced draft door 41 that can be opened and closed and is set at the second air inlet 12, and the outlet of the mixing air box 30 is connected to the air outlet 13 of the casing 10.

[0033] It can be understood that, in the initial state, the air guide door 41 closes the second air inlet 12; at this time, the indoor air enters the indoor space in sequence through the first air inlet 11, the heat exchange module 20, the first inlet 31 of the mixing air box 30, the outlet of the mixing air box 30, and finally the air outlet 13; in the case that there is a risk of condensation at the air outlet 13, the air guide door 41 opens the second air inlet 12, and part of the indoor air enters the mixing air box 30 in sequence through the first air inlet 11, the heat exchange module 20, and the first inlet 31 of the mixing air box 30 (referred to as primary air), and part of the indoor air enters the mixing air box 30 through the second air inlet 12 and the second inlet 32 of the mixing air box 30 (referred to as secondary air); after the primary air and the secondary air are mixed in the mixing air box 30, they are blown into the indoor space through the outlet of the mixing air box 30 and the air outlet 13; since the secondary air directly uses indoor air, the temperature of the primary air can be improved, so that the temperature of the mixed air after the primary air and the secondary air are mixed is improved, thereby avoiding the risk of condensation at the air outlet 13 and improving the user experience.

[0034] The air conditioner indoor unit provided by the embodiment of the present application is provided with the first air inlet 11 and the second air inlet 12 on the casing 10, the first air inlet 11 is in communication with the heat exchange module 20, the heat exchange module 20 is connected to the first inlet 31 of the mixing air box 30, and the second air inlet 12 is directly communicated to the second inlet 32 of the mixing air box 30. During the operation of the air conditioner, the indoor air enters through the first air inlet 11, is cooled by the heat exchange module 20, and then enters the mixing air box 30, and at the same time, the indoor air directly enters the mixing air box 30 through the second air inlet 12; the two air flows are fully mixed in the mixing air box 30, so that the temperature of the mixed air at the outlet of the mixing air box 30 is improved, thereby effectively avoiding the condensation phenomenon of the air outlet 13 due to the contact of the low-temperature air flow with the surrounding hot and humid air, reducing the risk of condensate dripping, and thereby improving the safety and comfort of the use of the air conditioner and improving the user experience.

[0035] It should be noted that, during the operation of the traditional air conditioner, the indoor air usually enters the casing 10 through the first air inlet 11, is then cooled by the heat exchange module 20, and is directly blown to the indoor space through the air outlet 13. Since the low-temperature air is directly sent out without mixing, a clear low-temperature direct blowing area is easily formed in a local area, resulting in uneven distribution of cold and hot air and affecting the comfort of the user. By fully mixing the low-temperature air after the heat exchange module 20 and the high-temperature indoor air directly introduced from the second air inlet 12 in the mixing air box 30, the present application effectively improves the temperature of the air sent out by the air outlet 13, reduces the temperature difference between the air sent out and the indoor environment, and can effectively avoid the uneven distribution of cold and hot air due to a large local temperature difference, thereby significantly improving the uniformity of the indoor temperature field and improving the comfort of the use of the air conditioner.

[0036] According to an embodiment of the present application, the heat exchange module 20 comprises an evaporator, which is not only used to realize the air cooling or heating function, but also has a good dehumidification effect.

[0037] It can be understood that, in the air conditioning refrigeration operation process, when the indoor air enters through the first air inlet 11 and flows through the evaporator, the water vapor in the air will be cooled and condensed into water droplets on the surface of the evaporator, thereby effectively reducing the humidity of the air; in this way, while improving the air treatment efficiency, the water content in the air is further reduced, the possibility of condensation in the subsequent air outlet 13 is reduced, the adaptability and stability of the whole machine in a high humidity environment are enhanced, and a more comfortable use environment is provided for the user.

[0038] In an embodiment of the present application, the air conditioner indoor unit further comprises a first sensor and a controller; wherein the first sensor is arranged at the outlet of the heat exchange module 20, and is used to detect the outlet air temperature of the heat exchange module 20; the controller is electrically connected with the first sensor and the air guide door 41 respectively, and is used to control the air guide door 41 to open or close based on the outlet air temperature detected by the first sensor.

[0039] It can be understood that the first sensor is arranged at the outlet position of the heat exchange module 20, and is used to detect the air temperature flowing out of the heat exchange module 20 in real time, i.e. the outlet air temperature after heat exchange. The controller is electrically connected with the first sensor and the air guide door 41 respectively, and is used to receive the temperature signal collected by the first sensor, and determine whether the current outlet air temperature is lower than the set threshold value according to the temperature signal. When it is detected that the outlet air temperature is low and there is a risk of condensation, the controller will automatically adjust the opening state of the air guide door 41, effectively preventing the condensation phenomenon at the air outlet 13 due to the contact between the low-temperature airflow and the humid hot air.

[0040] It should be noted that the controller can adjust the opening degree of the air guide door 41 according to the temperature signal collected by the first sensor, and then adjust the mixing ratio of the primary air and the secondary air entering the mixed air box 30, so as to improve the overall temperature of the mixed air in the mixed air box 30, and further improve the stability of the air conditioner operation and the user's use comfort.

[0041] In an embodiment of the present application, the air conditioner indoor unit further comprises a second sensor, which is used to detect indoor environment information, and the controller is electrically connected with the second sensor, and is used to determine the dew point temperature based on the indoor environment information.

[0042] It can be understood that the second sensor is used to detect indoor environment information, which can be temperature, humidity and other information related to the state of the air. The controller is electrically connected with the second sensor, and can calculate the current indoor dew point temperature according to the indoor environment information collected by the second sensor.

[0043] It should be noted that the dew point temperature refers to the critical temperature at which water vapor in the air begins to condense into liquid water. By determining this temperature, the controller can determine whether the air outlet 13 is at risk of condensation under the current operating state, and control the opening and closing state of the air guide door 41 accordingly, thereby effectively avoiding the occurrence of condensation phenomenon and improving the safety of equipment operation and user experience.

[0044] In an embodiment of the present application, the air conditioner indoor unit further comprises a third sensor, which is arranged at the air outlet 13 and is used to detect the mixed air temperature of the air outlet 13. The controller is electrically connected with the third sensor.

[0045] It can be understood that the air outlet 13 is provided with a third sensor for real-time detection of the mixed air temperature blown out from the air outlet 13 to accurately reflect the air temperature state after mixing by the mixed air box 30. The controller is electrically connected with the third sensor, can receive the air outlet temperature signal collected thereby, and adjust the opening degree of the air guide door 41 according to the mixed air temperature, thereby adjusting the mixed air temperature.

[0046] It should be noted that in other embodiments, the third sensor can also be arranged at the outlet of the mixed air box 30.

[0047] In a specific embodiment of the present application, the air conditioner indoor unit comprises a housing 10, a heat exchange module 20, a mixed air box 30 and an air guide assembly. Wherein: The housing 10 comprises a first air inlet 11, a second air inlet 12 and an air outlet 13.

[0048] The heat exchange module 20 is arranged in the housing 10, and the heat exchange module 20 comprises an evaporator and a first fan. The evaporator inlet is communicated with the first air inlet 11. The first fan is used to introduce indoor air into the evaporator through the first air inlet 11, and the evaporator performs cooling and dehumidification treatment on the indoor air.

[0049] The mixed air box 30 is arranged in the housing 10, and the mixed air box 30 comprises a first inlet 31 and a second inlet 32. The first inlet 31 is communicated with the outlet of the evaporator, and the second inlet 32 is communicated with the second air inlet 12. The outlet of the mixed air box 30 is communicated with the air outlet 13.

[0050] The air guide assembly is arranged at the second air inlet 12, and the air guide assembly comprises a second fan and an air guide door 41. The air guide door 41 is arranged at the second air inlet 12 in an openable and closable manner. It should be noted that when the air guide door 41 opens the second air inlet 12, the second fan is started to introduce indoor air into the mixed air box 30 through the second air inlet 12. In this embodiment, the second fan is started before the air guide door 41 opens the second air inlet 12, and the second fan is closed after the air guide door 41 closes the second air inlet 12.

[0051] It can be understood that the indoor air flows through the evaporator for cooling and dehumidification treatment, and the treated air is referred to as primary air; the indoor air directly enters the mixed air box 30 through the second air inlet 12 and is referred to as secondary air, and the primary air and the secondary air are fully mixed in the mixed air box 30 and then discharged into the indoor through the air outlet 13; since the secondary air is directly used indoor air, the temperature of the supply air can be improved without bringing additional heat.

[0052] In this embodiment, the first fan and the second fan can be variable frequency fans to control the air volume of the primary air and the secondary air. It should be noted that the air volume adjustment of the secondary air can be realized by adjusting the operating frequency of the second fan and / or controlling the opening angle of the air guide door 41; the speed of the second fan is adjusted by the variable frequency control mode, so that the flow of the secondary air entering the mixed air box 30 can be controlled; the angle adjustment of the air guide door 41 can control the introduction ratio of the secondary air, so as to realize the dynamic adjustment of the mixed air temperature.

[0053] It should be noted that the air temperature at the air outlet 13 can be improved by adjusting the opening of the air guide door 41, changing the speed of the fan or controlling the working state of the heat exchange module 20, so as to avoid the condensation phenomenon caused by the contact between the low-temperature airflow and the surrounding hot and humid air.

[0054] Further, the first sensor is arranged at the outlet position of the heat exchange module 20 to detect the temperature of the air flowing out of the heat exchange module 20, i.e. the temperature of the primary air; the second sensor includes an indoor temperature sensor and an indoor humidity sensor, the indoor temperature sensor is used to detect the indoor temperature in real time, and the indoor humidity sensor is used to detect the indoor humidity in real time, and the relative humidity of the indoor environment can be obtained based on the indoor humidity; the third sensor is arranged at the air outlet 13 to detect the temperature of the mixed air in real time.

[0055] It should be noted that the dry-bulb temperature sensor is arranged at the outlet of the heat exchange module 20 and the outlet of the mixed air box 30 to measure the dry-bulb temperature of the air after the heat exchange module 20 and the dry-bulb temperature of the mixed air at the outlet of the mixed air box 30, respectively. The controller estimates the dew point temperature of the current indoor environment in real time according to the collected dry-bulb temperature at the outlet of the heat exchange module 20, the dry-bulb temperature at the outlet of the mixed air box 30 and the relative humidity of the indoor environment; in this way, it can be judged whether the air in the air outlet 13 area can reach the dew point state, so that the anti-condensation control strategy can be taken in advance, and the phenomenon of condensate drops at the air outlet 13 can be effectively avoided.

[0056] Based on the air conditioner indoor unit provided by any of the above embodiments, an embodiment of the present application further provides a control method of an air conditioner indoor unit, as shown in Figure 2 The method comprises the following steps: Step 100, determining the dew point temperature of the indoor environment.

[0057] For example, the dry-bulb temperature of the air at the outlet of the heat exchange module 20 and the dry-bulb temperature of the mixed air at the outlet of the mixed air box 30 are collected by the dry-bulb temperature sensors arranged at the outlets of the heat exchange module 20 and the mixed air box 30 respectively, and the dew point temperature of the current indoor environment is determined in real time in combination with the relative humidity of the indoor environment detected by the second sensor.

[0058] In step 200, whether the outlet 13 has a condensation risk is determined based on the outlet air temperature and the dew point temperature.

[0059] It can be understood that the outlet air temperature and the dew point temperature are compared to determine whether the outlet 13 has a condensation risk; if the outlet air temperature is lower than the dew point temperature, it is determined that the outlet 13 has a condensation risk.

[0060] In step 300, in the case that there is a condensation risk, the air guide door 41 is controlled to open the second air inlet 12 to introduce the indoor air into the mixed air box 30 through the second air inlet 12.

[0061] It can be understood that in the case that it is determined that the outlet 13 has a condensation risk, the air guide door 41 opens the second air inlet 12, and part of the indoor air enters the mixed air box 30 through the first air inlet 11, the heat exchange module 20 and the first inlet 31 of the mixed air box 30 (referred to as primary air) in sequence, and part of the indoor air enters the mixed air box 30 through the second air inlet 12 and the second inlet 32 of the mixed air box 30 (referred to as secondary air), and the primary air and the secondary air are mixed in the mixed air box 30 and then blown into the indoor environment through the outlet of the mixed air box 30 and the outlet 13. Since the secondary air directly uses the indoor air, the temperature of the primary air can be improved, so that the temperature of the mixed air after the primary air and the secondary air are mixed is improved, thereby avoiding the condensation risk at the outlet 13 and improving the user experience.

[0062] In an embodiment of the present application, as shown in Figure 3 Step 100, the dew point temperature of the indoor environment is determined, which can specifically include the following steps: In step 110, the humidity of the indoor environment is obtained.

[0063] In step 120, the dew point temperature of the indoor environment is determined based on the humidity of the indoor environment.

[0064] It can be understood that the indoor humidity of the current indoor environment is obtained by the second sensor to reflect the water content in the air; and the dew point temperature Td of the current indoor environment is determined based on the obtained humidity of the indoor environment and in combination with the dry-bulb temperature of the air at the outlet of the heat exchange module 20 and the dry-bulb temperature of the mixed air at the outlet of the mixed air box 30.

[0065] In an embodiment of the present application, as shown in Figure 4As shown, step 200 specifically can include the following steps: Step 210, obtaining the outlet air temperature of the heat exchange module 20.

[0066] Step 220, in the case that the temperature difference between the dew point temperature and the outlet air temperature is greater than or equal to the preset value, it is determined that the outlet air port 13 has a condensation risk.

[0067] It can be understood that the outlet air temperature (i.e. primary air temperature T1) of the heat exchange module 20 is obtained, and in the case that the outlet air temperature is less than the dew point temperature and the temperature difference between the dew point temperature Td and the outlet air temperature is greater than or equal to the preset value, it is determined that the outlet air port 13 has a condensation risk.

[0068] It should be noted that in the case that the temperature difference between the dew point temperature and the outlet air temperature is less than the preset value, it is determined that the outlet air port 13 does not have a condensation risk, the primary air is directly output, and the air guide door 41 is closed to close the second air inlet port 12, i.e. the secondary air is closed.

[0069] For example, the preset value x is 2℃, T1≤Td+2, and the outlet air port 13 has a condensation risk; T1>Td+2, and the outlet air port 13 does not have a condensation risk.

[0070] In an embodiment of the present application, as shown in Figure 5 As shown, in step 300, the air guide door 41 is controlled to open the second air inlet port 12, which specifically can include the following steps: Step 310, obtaining the mixed air temperature of the outlet air port 13.

[0071] Step 320, determining the mixing ratio based on the indoor temperature, the mixed air temperature and the outlet air temperature.

[0072] Step 330, determining the air volume of the second air inlet port 12 based on the mixing ratio and the air volume of the first air inlet port 11.

[0073] Step 340, adjusting the opening degree of the air guide door 41 based on the air volume of the second air inlet port 12.

[0074] It can be understood that the third sensor arranged at the outlet air port 13 is used to obtain the mixed air temperature Tmix of the current outlet air port 13, which is used to reflect the state of the air after mixing by the mixed air box 30; based on the obtained indoor temperature Tn, mixed air temperature Tmix and outlet air temperature (primary air temperature T1) of the heat exchange module 20, the air mixing ratio, i.e. the mixing ratio, is calculated; according to the mixing ratio and the air volume of the first air inlet port 11, the air volume of the second air inlet port 12 is calculated; and according to the calculated required air volume of the second air inlet port 12, the opening degree of the air guide door 41 is adjusted, so as to realize the control of the secondary air introduction amount.

[0075] Optionally, step 320 specifically can include the following contents: determining a first difference between the indoor temperature and the mixed air temperature; determining a second difference between the indoor temperature and the outlet air temperature; determining a mixing ratio as a ratio of the first difference to the second difference.

[0076] For example, the mixing ratio is determined based on formula (1): (1) wherein, represents the mixing ratio.

[0077] The air volume of the second air inlet is determined based on formula (2): (2) wherein, represents the air volume of the first air inlet, i.e. the primary air volume; represents the air volume of the second air inlet, i.e. the secondary air volume.

[0078] It can be understood that, according to the calculated secondary air volume requirement, the air volume required by the second air inlet can be satisfied by adjusting the rotating speed of the second air fan or adjusting the opening angle of the air guide door 41, or adjusting both. Specifically, when the secondary air introduction amount needs to be increased, the rotating speed of the second air fan and / or the opening angle of the air guide door 41 can be increased; conversely, if the air volume needs to be reduced, the rotating speed of the air fan and / or the opening angle of the air guide door 41 can be reduced.

[0079] In one specific embodiment of the present application, the control method of the air conditioner indoor unit comprises the following steps: S1, starting the cooling operation, and collecting data in real time by each sensor.

[0080] S2, obtaining the relative humidity of the indoor environment, and determining whether the relative humidity meets the condensation condition.

[0081] For example, it is determined whether the relative humidity of the indoor environment is greater than 40%, and when the relative humidity of the indoor environment is greater than 40%, step S3 is executed; when the relative humidity of the indoor environment is less than or equal to 40%, it indicates that the indoor air is relatively dry, and the air guide door 41 is in the state, directly outputting the primary air and closing the secondary air.

[0082] S3, calculating the dew point temperature Td of the indoor environment based on the humidity of the indoor environment, and collecting the outlet air temperature of the heat exchange module 20.

[0083] The outlet air temperature of the heat exchange module 20 is the primary air temperature T1.

[0084] S4. Determine whether T1 is less than or equal to Td+x. If T1≤Td+x, execute step S5. If T1>Td+2, the air induced door 41 is in the state, directly outputs the primary air, and closes the secondary air.

[0085] S5. Control the air induced door 41 to open the second air inlet 12 to start the secondary air.

[0086] S6. Obtain the mixed air temperature Tmix at the air outlet 13 and determine whether Tmix is ​​less than or equal to Td+x. If Tmix>Td+2, maintain the second fan speed and the opening angle of the induced draft door 41; if Tmix≤Td+x, increase the secondary air ratio until Tmix>Td+2.

[0087] The embodiment of the present invention also provides a control device for an air conditioner indoor unit, such as Figure 6 As shown, the device includes a determination module 610, a judgment module 620 and a control module 630, wherein: The determination module 610 is configured to determine the dew point temperature of the indoor environment.

[0088] The judgment module 620 is used to judge whether there is a condensation risk at the air outlet based on the air outlet temperature and the dew point temperature.

[0089] The control module 630 is used to control the air intake door to open the second air inlet when there is a risk of condensation, so as to introduce the indoor air into the mixing air box through the second air inlet.

[0090] An embodiment of the present invention provides an air conditioner, which includes the air conditioner indoor unit provided by any of the above embodiments.

[0091] Figure 7 An example of a physical structure diagram of an electronic device is shown below. Figure 7 As shown, the electronic device may include: a processor, a communications interface (CAI), a memory (memory), and a communications bus. The processor, communications interface (720), and memory (730) communicate with each other via a communications bus (740). Processor (710) may invoke logic instructions in memory (730) to execute a method for controlling an air conditioner indoor unit. The method includes: determining the dew point temperature of the indoor environment; determining whether there is a condensation risk at the air outlet based on the outlet air temperature and the dew point temperature; and, if there is a condensation risk, controlling the air induction door to open the second air inlet to introduce indoor air into the mixing air box through the second air inlet.

[0092] In addition, the logic instructions in the memory 730 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0093] In another aspect, the present application also provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program is executed by a processor, so that the computer can execute the control method of the air conditioner indoor unit provided by the above-mentioned methods, and the method comprises: determining the dew point temperature of the indoor environment; judging whether there is a condensation risk in the air outlet based on the outlet temperature and the dew point temperature; and in the case of condensation risk, controlling the air guide door to open the second air inlet to introduce indoor air into the mixed air box through the second air inlet.

[0094] In another aspect, the present application also provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the control method of the air conditioner indoor unit provided by the above-mentioned methods, and the method comprises: determining the dew point temperature of the indoor environment; judging whether there is a condensation risk in the air outlet based on the outlet temperature and the dew point temperature; and in the case of condensation risk, controlling the air guide door to open the second air inlet to introduce indoor air into the mixed air box through the second air inlet.

[0095] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An air conditioner indoor unit, characterized in that: include: a housing comprising a first air inlet, a second air inlet, and an air outlet; a heat exchange module, disposed in the housing, wherein an inlet of the heat exchange module is connected to the first air inlet; a mixing air box, disposed in the housing, comprising a first inlet and a second inlet, wherein the first inlet is connected to the outlet of the heat exchange module, and the second inlet is connected to the second air inlet; and the outlet of the mixing air box is connected to the air outlet; The air induction component includes an air induction door that can be opened and closed and is arranged at the second air inlet.

2. The air conditioner indoor unit according to claim 1, characterized in that: Also includes: A first sensor is provided at the outlet of the heat exchange module; A controller is electrically connected to the first sensor and the air induced door, respectively, and is used to control the air induced door to open or close based on the air outlet temperature detected by the first sensor.

3. The air conditioner indoor unit according to claim 2, characterized in that: Also includes: The second sensor is electrically connected to the controller, and the second sensor is used to detect indoor environmental information. The controller is used to determine the dew point temperature based on the indoor environmental information.

4. The air conditioner indoor unit according to claim 2, characterized in that: Also includes: A third sensor is electrically connected to the controller, and is used to detect the mixed air temperature at the air outlet.

5. The air conditioner indoor unit according to any one of claims 1 to 4, characterized in that: The heat exchange module includes an evaporator.

6. A control method for an air conditioner indoor unit according to any one of claims 1 to 5, characterized in that: include: Determine the dew point temperature of the indoor environment; Based on the air outlet temperature and the dew point temperature, determining whether there is a condensation risk at the air outlet; When there is a risk of condensation, the air induced door is controlled to open the second air inlet to introduce the indoor air into the mixing air box through the second air inlet.

7. The control method of the air conditioner indoor unit according to claim 6, characterized in that: Based on the air outlet temperature and the dew point temperature, determining whether there is a condensation risk at the air outlet includes: Get the outlet air temperature of the heat exchange module; When the temperature difference between the dew point temperature and the air outlet temperature is greater than or equal to a preset value, it is determined that there is a condensation risk at the air outlet.

8. The control method of the air conditioner indoor unit according to claim 6, characterized in that: The controlling the air induced door to open the second air inlet comprises: Get the mixed air temperature at the air outlet; determining a mixing ratio based on the indoor temperature, the mixed air temperature, and the outlet air temperature; determining an air volume of the second air inlet based on the mixing ratio and the air volume of the first air inlet; The opening of the air induced door is adjusted based on the air volume of the second air inlet.

9. The control method of the air conditioner indoor unit according to claim 8, characterized in that: The determining of the mixing ratio based on the indoor temperature, the mixed air temperature, and the outlet air temperature includes: determining a first difference between the indoor temperature and the mixed air temperature; determining a second difference between the indoor temperature and the outlet air temperature; The ratio of the first difference to the second difference is determined as a mixing ratio.

10. An air conditioner, characterized in that: It comprises the air conditioner indoor unit according to any one of claims 1 to 5.

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