An air conditioner indoor unit, an air supply method, and an air conditioner

Abstract

The application discloses an air conditioner indoor unit, an air supply method and an air conditioner. The indoor unit comprises a shell, the shell is provided with at least one air inlet and at least one air outlet, the indoor unit further comprises at least one air supply assembly, the air supply assembly comprises an air duct which is communicated with the air inlet and the air outlet, and a second fan and a first fan which are arranged on the air duct; wherein: the first fan is arranged corresponding to the position of the air inlet, and the second fan is arranged corresponding to the position of the air outlet; the air supply direction of the first fan is consistent with the air supply direction of the second fan, and the size of the fan blade of the second fan is smaller than the size of the fan blade of the first fan; the first fan is used for pressurizing the airflow entering the air duct once; and the second fan is used for pressurizing the airflow blown out from the first fan twice. The application sets the flow gathering fan at the center of the air outlet, so that the airflow of the air outlet is gathered to the center, the diffusion amount is reduced, and the air supply distance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to an air conditioner indoor unit, an air supply method and an air conditioner. BACKGROUND

[0002] When an air conditioner is supplying air, due to the difference between the inside and outside of the air duct, the airflow will rapidly spread in all directions after leaving the air outlet. This characteristic can increase the air supply area of the air conditioner, but it will also seriously shorten the air supply distance. For example, when an axial flow air conditioner is working in a large indoor environment (such as a restaurant, a workshop or a shopping mall), the air supply distance is not enough to effectively cool the remote area, resulting in poor user experience in the remote area. At the same time, due to the short air supply distance, the indoor air convection circulation effect is poor, the overall room cooling effect is uneven, and the situation of "near cold and far hot" occurs. SUMMARY

[0003] In view of this, the present application discloses an air conditioner indoor unit, an air supply method and an air conditioner to solve the problem that the existing air conditioner cannot effectively cool the remote area due to the short air supply distance, resulting in poor user experience in the remote area, and also leading to poor indoor air circulation, uneven overall temperature and poor comfort.

[0004] To achieve the above-mentioned target, the technical solution adopted by the embodiments of the present application is as follows:

[0005] The first aspect of the embodiments of the present application discloses an air conditioner indoor unit. The indoor unit comprises a shell, the shell is provided with at least one air inlet and at least one air outlet. The indoor unit further comprises at least one air supply assembly, the air supply assembly comprises: an air duct communicating with the air inlet and the air outlet, and a second fan and a first fan arranged on the air duct; wherein:

[0006] The first fan is arranged corresponding to the position of the air inlet, and the second fan is arranged corresponding to the position of the air outlet;

[0007] The air supply direction of the first fan is consistent with the air supply direction of the second fan, and the size of the fan blade of the second fan is smaller than the size of the fan blade of the first fan;

[0008] The first fan is used to pressurize the airflow entering the air duct once;

[0009] The second fan is used to pressurize the airflow blown out from the first fan twice.

[0010] Further optionally, the first fan is arranged at the air inlet, and the second fan is arranged at the air outlet. The fan type of the first fan is an axial fan, and the fan type of the second fan is an axial fan.

[0011] Further optionally, the air supply assembly further comprises:

[0012] An air outlet grille is arranged at the air outlet, and the second air fan is arranged at the center of the air outlet grille; the air outlet grille comprises an outer frame, a core frame, and a plurality of grille bars connected between the outer frame and the core frame; the outer frame is arranged at the air outlet; and the second air fan is fixed on the core frame.

[0013] Further, the air supply assembly further comprises a plurality of fixing devices, each of which comprises a connecting rod and a flexible piece; one end of the connecting rod is connected to the motor shell of the second air fan, and the other end of the connecting rod is connected to the core frame to fix the second air fan; and the flexible piece is arranged at the connection between the other end of the connecting rod and the core frame.

[0014] Further, the grille bars are curved in an arc shape, each of the grille bars is curved towards the same direction, and the curved direction is opposite to the rotation direction of the fan blades of the second air fan.

[0015] The rotation direction of the fan blades of the second air fan is the same as the rotation direction of the fan blades of the first air fan.

[0016] Further, the air conditioner is a cabinet type air conditioner, and the air outlet and the air inlet of the air supply assembly are respectively formed on the opposite side walls of the shell.

[0017] Further, the at least one air outlet comprises upper and lower air outlets, and the at least one air supply assembly comprises a first air supply assembly and a second air supply assembly; the first air fan of the first air supply assembly and the first air fan of the second air supply assembly are arranged on the same side wall and arranged in an upper and lower arrangement, wherein the first air fan of the first air supply assembly is arranged corresponding to the upper air outlet, and the first air fan of the second air supply assembly is arranged corresponding to the lower air outlet.

[0018] Further, the indoor unit further comprises:

[0019] A control module is connected to the first air supply assembly and the second air supply assembly, and is used to control the operating state of the upper air fan and / or the lower air fan.

[0020] Further, the indoor unit further comprises:

[0021] A detection device is arranged between the air outlet of the first air supply assembly and the air outlet of the second air supply assembly, and is used to detect whether there is a person in the air supply direction of the indoor unit.

[0022] The detection device is connected to the control module, and the control module controls the operating state of the upper air fan and / or the lower air fan according to the detection signal of the detection device.

[0023] The second aspect of the embodiment of the application discloses a method for air supply of an indoor unit, the indoor unit comprising a shell, the shell being provided with at least one air inlet and at least one air outlet, the indoor unit further comprising at least one air supply assembly, the air supply assembly comprising: an air duct communicating the air inlet and the air outlet, and a second fan and a first fan arranged on the air duct; wherein: the first fan is arranged corresponding to the position of the air inlet, and the second fan is arranged corresponding to the position of the air outlet; the air supply direction of the first fan is consistent with the air supply direction of the second fan, and the size of the fan blade of the second fan is smaller than the size of the fan blade of the first fan; the first fan is used for pressurizing the airflow entering the air duct once; the second fan is used for pressurizing the airflow blown out by the first fan twice; the method comprises:

[0024] in response to the long-distance air supply instruction, controlling the second fan of the air supply assembly associated with the long-distance air supply instruction to pressurize the airflow blown out by the first fan thereof twice.

[0025] Further optionally, the at least one air outlet comprises upper and lower air outlets, and the at least one air supply assembly comprises a first air supply assembly and a second air supply assembly, the first air supply assembly and the second air supply assembly being arranged on the same side wall and arranged in an upper and lower manner, wherein the first air supply assembly corresponds to the upper air outlet, and the second air supply assembly corresponds to the lower air outlet; the long-distance air supply instruction comprises a first-level long-distance air supply instruction; in response to the long-distance air supply instruction, controlling the second fan of the air supply assembly associated with the long-distance air supply instruction to pressurize the airflow blown out by the first fan thereof twice, comprising:

[0026] in response to the first-level long-distance air supply instruction, controlling the second fan of the first air supply assembly to operate at a first set rotating speed to pressurize the airflow blown out by the first fan thereof twice.

[0027] Further optionally, the long-distance air supply instruction comprises a second-level long-distance air supply instruction; in response to the long-distance air supply instruction, controlling the second fan of the air supply assembly associated with the long-distance air supply instruction to pressurize the airflow blown out by the first fan thereof twice, comprising:

[0028] in response to the second-level long-distance air supply instruction, controlling the second fan of the first air supply assembly and the second fan of the second air supply assembly to operate at a second set rotating speed; or,

[0029] controlling the second fan of the first air supply assembly to operate at the second set rotating speed;

[0030] detecting whether there is a person in the air outlet direction of the indoor unit;

[0031] in the case that there is a person in the air outlet direction, making the second fan of the second air supply assembly in a closed state; or,

[0032] in the case that there is no person in the air outlet direction, making the second fan of the second air supply assembly operate at the second set rotating speed.

[0033] Further optionally, detecting whether there is a person in the air outlet direction of the indoor unit comprises:

[0034] Detecting whether there is a person in the air outlet direction of the indoor unit according to a set time interval.

[0035] Further optionally, the first set rotating speed is determined according to a set air supply distance of the first air supply assembly; and the second set rotating speed is determined according to a set air supply distance of the second air supply assembly.

[0036] The second aspect of the embodiment of the application discloses an air conditioner, which comprises the indoor unit of any one of the first aspect; or, the air conditioner adopts the method of any one of the second aspect.

[0037] Beneficial effects: By setting a small high-speed converging fan at a corresponding position in the center of the air outlet, the central airflow from the main fan in the air duct is subjected to secondary pressurization, so that the flow rate of the central airflow is greater than that of the outer airflow, the inner air pressure of the overall airflow is less than the outer air pressure, the outer airflow is gathered to the center under the action of the pressure difference force, the diffusion amount is reduced, the air supply distance is increased, the indoor cold air convection circulation effect is enhanced, the overall indoor temperature drop is uniform, and the comfort is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and other objects, features and advantages of the disclosed application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which:

[0039] Figure 1 Exemplarily shows a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the application;

[0040] Figure 2 Exemplarily shows a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the application;

[0041] Figure 3 Exemplarily shows a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the application;

[0042] Figure 4 Exemplarily shows a structural schematic diagram of an air conditioner indoor unit according to an embodiment of the application;

[0043] Figure 5 Exemplarily shows a flow field diagram of air conditioner air outlet when the upper converging fan is not started;

[0044] Figure 6 Exemplarily shows a flow field diagram of air conditioner air outlet when the upper converging fan is started;

[0045] Figure 7 Fig. 1 shows a flow chart of a method for air supply according to an embodiment of the present application;

[0046] Figure 8 Fig. 1 shows a flow chart of a method for air supply according to an embodiment of the present application.

[0047] Wherein: 1 - air outlet grille, 2 - second fan, 3 - detection device, 4 - first fan, 11 - outer frame, 12 - core frame, 13 - grille bar. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application but not 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 efforts fall within the scope of the present application.

[0049] The terms used in the embodiments of the present application are only for the purpose of describing particular embodiments and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two but does not exclude the case of including at least one.

[0050] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0051] It should also be noted that the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such product or system. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the product or system including the element.

[0052] The existing air conditioner cannot effectively control the temperature of the remote area due to the short air supply distance, resulting in poor user experience of the remote area, and poor indoor air circulation, uneven overall temperature and poor comfort. To this end, the first aspect of the embodiment of the present application discloses an air conditioner indoor unit, as shown in Figure 1 、 Figure 2 The shell is provided with at least one air inlet and at least one air outlet, and the indoor unit further comprises at least one air supply assembly, which comprises an air duct communicating with the air inlet and the air outlet, and a second fan 2 and a first fan 4 arranged on the air duct.

[0053] The first fan 4 (main fan) is arranged corresponding to the position of the air inlet, and the second fan 2 is arranged corresponding to the position of the air outlet; the air supply direction of the first fan 4 is consistent with the air supply direction of the second fan 2, and the size of the fan blade of the second fan 2 is smaller than the size of the fan blade of the first fan 4.

[0054] The first fan 4 is used to pressurize the airflow entering the air duct once;

[0055] The second fan 2 is used to pressurize the airflow blown out by the first fan 4 twice.

[0056] The air conditioner indoor unit provided by the embodiment comprises at least one air supply assembly, for each air supply assembly, by adding a second fan 2 in the air duct, and the air supply direction of the second fan 2 is consistent with the air supply direction of the first fan 4, and the size of the fan blade of the second fan 2 is smaller than the size of the fan blade of the first fan 4, the airflow blown out by the first fan 4 is pressurized twice by the second fan 2, so that the central air pressure of the airflow discharged from the air outlet is lower than the outside air pressure, and the central flow rate is higher than the outside flow rate. By using the principle of pressure difference, the effect of gathering the airflow to the center under the action of the pressure difference force is enhanced, the gas diffusion amount and pressure loss along the path are reduced, the air supply distance is improved, the refrigeration capacity of the indoor remote end is enhanced, the air disturbance capacity of the air conditioner to the indoor air is enhanced, the circulation convection of the indoor air is enhanced, the indoor temperature is more uniform, and the comfort is improved. Thus, the problem that the existing air conditioner cannot effectively control the temperature of the remote area due to the short air supply distance, resulting in poor user experience of the remote area, and poor indoor air circulation, uneven overall temperature and poor comfort is effectively solved.

[0057] Since the size of the second fan 2 is small and it plays a role in flow gathering and speed increasing, it is also called a small high-speed flow gathering fan, which can be realized by using an air circulation fan, a high-speed fan, etc.

[0058] Among them: an indoor heat exchanger can be arranged between the first fan 4 and the air inlet, under the action of the first fan 4, the indoor air or outdoor fresh air enters the air duct through the air inlet, and completes heat exchange with the indoor heat exchanger.

[0059] The second fan 2 can be arranged at a position close to the air outlet on the air duct, and the closer the position of the second fan 2 to the air outlet, the better the effect of air gathering and long-distance air supply.

[0060] When the air conditioner indoor unit has two or more air supply assemblies, taking two as an example, the air outlets of the two air supply assemblies can be located on the same side wall of the shell, so that better temperature control and long-distance air supply effects can be achieved in one direction, in which case the first fans (main fans) of the two air supply assemblies can share one indoor heat exchanger and one air inlet; or the air outlets of the two air supply assemblies can be located on different side walls of the shell, so that air gathering and long-distance air supply effects can be achieved in different air outlet directions, in which case each air supply assembly needs to be configured with a respective indoor heat exchanger.

[0061] The power of the second fan 2 determines the flow rate and pressure of the airflow after secondary pressurization, and the flow rate and pressure generated can be determined according to the distance difference before and after long-distance air supply.

[0062] In an implementation manner of the embodiment of the present application, as shown in Figure 1 , Figure 2 , the first fan 4 is arranged at the air inlet, and the second fan 2 is arranged at the air outlet, the fan type of the first fan 4 is an axial fan, and the fan type of the second fan 2 is an axial fan.

[0063] In this implementation manner, the first fan 4 and the second fan 2 are preferably axial fans, and based on the inventive concept of the present application, the types of the first fan 4 and the second fan 2 can be extended to other air conditioners, including but not limited to cross-flow fans and centrifugal fans.

[0064] In an implementation manner of the embodiment of the present application, as shown in Figure 3 , Figure 4 , the air supply assembly further comprises:

[0065] an air outlet grille 1 arranged at the air outlet, the second fan 2 being arranged at the center of the air outlet grille 1; the air outlet grille 1 can be adaptively arranged at the air outlet, so as to avoid foreign matters from entering the interior of the air conditioner indoor unit without affecting the air outlet effect; in the case that the fan types of the first fan 4 and the second fan 2 are both axial fans, the air outlet is preferably circular, and the corresponding air outlet grille 1 is also circular, but the shapes of the air outlet and the air outlet grille 1 are not limited thereto;

[0066] the air outlet grille 1 comprises an outer frame 11, a core frame 12, and a plurality of grille bars 13 connected between the outer frame 11 and the core frame 12; the outer frame 11 is arranged at the air outlet; and the second fan 2 is fixed on the core frame 12.

[0067] In the implementation of the embodiment, the second fan 2 is fixed on the heart frame 12 of the air outlet grille 1, and after the second fan 2 is started, the central part of the airflow from the main fan in the air duct is subjected to secondary pressurization and speed-up. After the secondary pressurization and speed-up of the second fan 2, the flow rate of the central airflow is greater than that of the outer airflow, and the air pressure of the central airflow is less than that of the outer airflow after the airflow leaves the air outlet grille 1. The outer airflow is gathered to the center under the action of the pressure difference, the diffusion amount is reduced, the air supply distance is increased, and the indoor cold air convection circulation effect is enhanced in the case of refrigeration. The indoor overall temperature drop is uniform, and the comfort is improved.

[0068] Further, the air supply assembly further comprises a plurality of fixing devices, the fixing device comprising a connecting rod and a flexible piece; one end of the connecting rod is connected to the motor shell of the second fan, and the other end of the connecting rod is connected to the heart frame to fix the second fan; and the flexible piece is arranged at the connection between the other end of the connecting rod and the heart frame.

[0069] The motor is fixed on the heart frame 12 of the air outlet grille 1 through the connecting rod, and the connecting rod, the motor shell and the heart frame are preferably threadedly connected. The flexible piece is arranged at the connection between the heart frame and the connecting rod, which can not only play a damping effect, but also achieve a certain degree of air diffusion. The number of fixing devices is preferably three, which can not only achieve a good fixing effect, but also increase the central airflow flow area of the main fan, thereby achieving better flow gathering and long-distance air supply effects.

[0070] In an implementation of the embodiment, as shown in Figure 3 , Figure 4 The grille bars 13 are curved in an arc shape, each grille bar 13 is curved towards the same direction, and the curved direction is opposite to the rotation direction of the fan blade of the second fan 2; the rotation direction of the fan blade of the second fan 2 is the same as that of the fan blade of the first fan 4.

[0071] When the rotation direction of the fan is opposite to the curved direction of the grille bars 13 of the air outlet grille, the airflow is gathered; for example, when the fan rotates to the left, the airflow sent by the fan will have a movement mode of spiraling to the left. When the right-rotating grille is encountered, the grille will make the airflow gather to the center due to the reaction force pointing to the inside of the airflow, and vice versa.

[0072] In an implementation of the embodiment, the air conditioner is a cabinet type air conditioner, and the air outlet and the air inlet of the air supply assembly are formed on the opposite side walls of the shell. The air outlets of different air supply assemblies can be located on the same side wall or different side walls.

[0073] In an implementation of the embodiment, as shown in Figure 1As shown, the at least one air outlet includes upper and lower air outlets, and the at least one air supply assembly includes a first air supply assembly and a second air supply assembly, the second fan of the first air supply assembly and the second fan of the second air supply assembly are located on the same side wall and arranged in an upper and lower manner, wherein the second fan of the first air supply assembly is arranged corresponding to the upper air outlet, and the first fan of the second air supply assembly is arranged corresponding to the lower air outlet.

[0074] The airflow blown by the first fan of the first air supply assembly is subjected to secondary pressurization and speed increase by the second fan of the first air supply assembly, so that the airflow blown by the upper air outlet is subjected to flow concentration and speed increase, thereby realizing the effect of long-distance flow concentration air supply of the upper air outlet. The airflow blown by the first fan of the second air supply assembly is subjected to secondary pressurization and speed increase by the second fan of the second air supply assembly, so that the airflow blown by the lower air outlet is subjected to flow concentration and speed increase, thereby realizing the effect of long-distance flow concentration air supply of the lower air outlet. By performing long-distance flow concentration air supply on the upper air outlet and / or the lower air outlet in the same air outlet direction, different long-distance air supply requirements can be realized, and indoor temperature uniformity and comfort can be improved. Further, the indoor unit further comprises a control module connected with the first air supply assembly and the second air supply assembly, for controlling the operation state of the upper fan and / or the lower fan.

[0075] The control module can include one controller or multiple controllers.

[0076] Optionally, each fan corresponds to a controller, that is, the motor of each fan is controlled by an independent controller.

[0077] Optionally, each air supply assembly is controlled by a controller.

[0078] Optionally, all air supply assemblies are controlled by one controller.

[0079] Further, the indoor unit further comprises a detection device arranged between the air outlet of the first air supply assembly and the air outlet of the second air supply assembly, for detecting whether there is a person in the air supply direction of the indoor unit.

[0080] The detection device is connected with the control module, and the control module controls the operation state of the upper fan and / or the lower fan according to the detection signal of the detection device.

[0081] By detecting whether there is a person in the air supply direction of the indoor unit and controlling the operation state of the upper fan and / or the lower fan according to the detection result, the straight blowing of the air conditioner to the user can be avoided, the air circulation effect can be improved, and the indoor temperature comfort can be further improved.

[0082] The second aspect of the embodiment of the present application provides a method for air supply of an indoor unit. The indoor unit comprises a shell, the shell is provided with at least one air inlet and at least one air outlet, and the indoor unit further comprises at least one air supply assembly. The air supply assembly comprises an air duct which is in communication with the air inlet and the air outlet, and a second fan and a first fan which are arranged on the air duct. The first fan is arranged corresponding to the position of the air inlet, and the second fan is arranged corresponding to the position of the air outlet. The air supply direction of the first fan is consistent with the air supply direction of the second fan, and the size of the fan blade of the second fan is smaller than the size of the fan blade of the first fan. The first fan is used to pressurize the airflow entering the air duct once, and the second fan is used to pressurize the airflow blown out by the first fan twice. As shown in the method, S1 comprises: Figure 7

[0083] S1, in response to a remote air supply instruction, controlling the second fan of the air supply assembly associated with the remote air supply instruction to pressurize the airflow blown out by the first fan thereof twice.

[0084] In the conventional control mode of the air conditioner, such as refrigeration, heating and the like, the first fan (main fan) of the air supply assembly is turned on, and the second fan is not turned on. The air conditioner is provided with different remote air supply modes, each remote air supply mode corresponds to a remote air supply instruction, and the air supply distance of each remote air supply mode can be the same or different. For example, the indoor unit of the air conditioner comprises two air supply assemblies, the air supply directions of the two air supply assemblies are different, the first remote air supply mode is to turn on the second fan of one of the air supply assemblies, the second remote air supply mode is to turn on the second fan of the other air supply assembly, or the third remote air supply mode is to turn on the second fans of the two air supply assemblies at the same time, or the air outlets of the two air supply assemblies are located on the same side wall of the shell and are arranged in an upper and lower manner, the first-level remote air supply mode is to turn on the second fan of the upper air supply assembly, and the second-level remote air supply mode is to turn on the second fans of the upper and lower air supply assemblies.

[0085] Further, the at least one air outlet comprises upper and lower air outlets, and the at least one air supply assembly comprises a first air supply assembly and a second air supply assembly. The first air supply assembly and the second air supply assembly are located on the same side wall and are arranged in an upper and lower manner. The first air supply assembly corresponds to the upper air outlet, and the second air supply assembly corresponds to the lower air outlet.

[0086] The remote air supply instruction comprises a first-level remote air supply instruction. In S1, in response to the remote air supply instruction, the second fan of the air supply assembly associated with the remote air supply instruction is controlled to pressurize the airflow blown out by the first fan thereof twice, which comprises S11:

[0087] In response to the first-level remote air supply instruction, the second fan of the first air supply assembly is controlled to operate at a first set speed to pressurize the airflow blown out by the first fan thereof twice.

[0088] ​The air supply method provided by the embodiment is based on different long-distance air supply instructions to start different long-distance air supply modes. When the second fan is started, the central airflow from the first fan in the air duct is subjected to secondary pressurization, so that the flow rate of the central airflow is greater than the flow rate of the outer airflow, and the inner side air pressure of the overall airflow is less than the outer side air pressure. By using the pressure difference principle, the outer airflow is gathered to the center of the airflow under the action of the pressure difference force, the gas diffusion amount and pressure loss along the path are reduced, the air supply distance is increased, the refrigeration capacity of the indoor far end is enhanced, the air supply of the air conditioner enhances the disturbance capacity of the indoor air, the circulation convection of the indoor air is enhanced, the indoor temperature is more uniform, and the comfort is improved. Thus, the problem that the existing air conditioner cannot effectively control the temperature of the remote area due to the short air supply distance, resulting in poor user experience of the remote area, and also causing poor indoor air circulation, uneven overall temperature, and poor comfort is effectively solved.

[0089] Further, the long-distance air supply instruction comprises a secondary long-distance air supply instruction; in S1, in response to the long-distance air supply instruction, the second fan of the air supply assembly associated with the long-distance air supply instruction is controlled to perform secondary pressurization on the airflow blown by the first fan of the air supply assembly, comprising S12-S13, wherein:

[0090] S12, in response to the secondary long-distance air supply instruction, the second fan of the first air supply assembly and the second fan of the second air supply assembly are controlled to operate at a second set rotating speed; or,

[0091] S12, the second fan of the first air supply assembly is controlled to operate at a second set rotating speed;

[0092] S13, whether there is a person in the air outlet direction of the indoor unit is detected;

[0093] S14, in the case that there is a person in the air outlet direction, the second fan of the second air supply assembly is in a closed state; or,

[0094] S15, in the case that there is no person in the air outlet direction, the second fan of the second air supply assembly is controlled to operate at a second set rotating speed;

[0095] Wherein, the second fan of the first air supply assembly is located above the second fan of the second air supply assembly.

[0096] In the air conditioner, a first long-distance air supply mode and a second long-distance air supply mode are provided, and the sinking effect of the gas during refrigeration is considered. When the first long-distance air supply mode is started, the air supply distance of the upper air outlet is enhanced by starting the air gathering fan arranged at the center of the upper air outlet grille. When the second long-distance air supply mode is started, the upper and lower high-speed fans are started at the same time.

[0097] S23, control the second fan of the first air supply assembly to run at a set rotating speed, acquire a detection signal of whether there is a person in the preset air supply area, and control the second fan of the second air supply assembly to start or stop according to the detection signal;

[0098] Considering that the upper and lower high-speed fans are started at the same time, the problem of directly blowing the human body may occur, in the embodiment, the infrared detection feedback is used to control the start and stop of the lower air outlet flow gathering fan, so as to avoid directly blowing the human body; wherein the preset air supply area refers to an area directly blown by air of the air conditioner, in the embodiment, the detection device is arranged between the upper and lower air outlets, so that the area directly blown by the human body can be detected.

[0099] In an implementation manner of the embodiment, S23, the air conditioner indoor unit controls the second fan of the second air supply assembly to start or stop according to the detection signal of whether there is a person in the air supply direction, including:

[0100] S231, determine whether there is a person in the air supply direction of the air conditioner indoor unit according to a set time interval; the infrared detection device can detect whether there is a person in the detection range in real time, or can detect once every several minutes.

[0101] Specifically, the gradient long-distance air supply control mode is used, the upper and lower high-speed fans are started according to different gradients, the maximum air supply distance is achieved, direct blowing of the human body is avoided, and the air conditioner can be started to supply air when there is no person and stopped to avoid direct blowing when there is a person.

[0102] Figure 5 A flow field diagram of air supply of the air conditioner when the upper flow gathering fan (i.e. the flow gathering fan at the upper air outlet) is not started; Figure 6 A flow field diagram of air supply of the air conditioner when the upper flow gathering fan is started; Figure 8 A flow chart of the air supply method of the embodiment of the present application; combined with Figure 5 、 Figure 6 、 Figure 8 , the implementation manner of the embodiment of the present application is described in detail.

[0103] When the user outputs Y1 through the remote controller to start the first-stage air supply function, the controller sends signal K1 to start the air gathering fan corresponding to the upper air outlet, and the first-stage long-distance air supply mode is started. When the user outputs Y2 through the remote controller to start the second-stage air supply function, the controller sends signal K2 to start the air gathering fan of the upper air outlet, and sends signal H1 to start the infrared detection device. The infrared detection device detects whether there is a human body in the air supply path of the lower air outlet. When the detection result is "yes", the detection device feeds back signal A, the controller receives signal A and sends signal K3, the air gathering fan of the lower air outlet is not started, and the prompt signal lamp is turned on. When the detection result is "no", the detection device feeds back signal B, the controller receives signal B and sends signal K4, the air gathering fan of the lower air outlet is started, and the prompt signal lamp is turned off. The infrared detection device is kept in the starting state. When a human body is detected and the continuous detection time is greater than or equal to 5s, the detection device sends signal C, the controller receives signal C and sends signal K3, the air gathering fan of the lower air outlet is turned off, and the prompt signal lamp is turned on. When the human body leaves, the detection device sends signal D, the air gathering fan of the lower air outlet is started, and the prompt signal lamp is turned off.

[0104] The third aspect of the embodiment of the present application discloses a cabinet air conditioner, which comprises the indoor unit of the air conditioner provided in any one of the preceding embodiments; or the cabinet air conditioner adopts the method provided in any one of the preceding embodiments.

[0105] In different embodiments provided by the present application, the same parameters, names, logics, etc. should be understood as having the same meaning, and the present application does not deliberately repeat the description in each embodiment.

[0106] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements within the spirit and scope of the appended claims.

Claims

1. An indoor unit for an air conditioner, characterized in that, The indoor unit includes a housing, the housing having at least one air inlet and at least one air outlet. The indoor unit also includes at least one air supply assembly, the air supply assembly comprising: an air duct connecting the air inlet and the air outlet, and a second fan and a first fan disposed on the air duct; wherein: The first fan is positioned corresponding to the air inlet, and the second fan is positioned corresponding to the air outlet; The air delivery direction of the first fan is the same as that of the second fan, and the blade size of the second fan is smaller than that of the first fan. The first fan is used to pressurize the airflow entering the air duct. The second fan is used to further pressurize the airflow blown out from the first fan; The air supply assembly also includes: An air outlet grille is disposed at the air outlet, and a second fan is disposed at the center of the air outlet grille; the air outlet grille includes an outer frame, a core frame, and a plurality of grille strips connecting the outer frame and the core frame; the outer frame is disposed at the air outlet; and the second fan is fixed on the core frame.

2. The indoor unit as described in claim 1, characterized in that, The first fan is located at the air inlet, and the second fan is located at the air outlet. The first fan is an axial flow fan, and the second fan is an axial flow fan.

3. The indoor unit as described in claim 1, characterized in that, The air supply assembly also includes multiple fixing devices, each including a connecting rod and a flexible component; one end of the connecting rod is connected to the motor housing of the second fan, and the other end of the connecting rod is connected to the core frame to fix the second fan; the flexible component is disposed at the connection between the other end of the connecting rod and the core frame.

4. The indoor unit as described in claim 1, characterized in that, The grille bars are curved arcs, and each grille bar bends in the same direction, with the bending direction opposite to the rotation direction of the blades of the second fan. The direction of rotation of the blades of the second fan is the same as that of the blades of the first fan.

5. The indoor unit as described in claim 1, characterized in that, The air conditioner is a cabinet-type air conditioner, and the air outlet and air inlet of the air supply component are respectively formed on the two opposite side walls of the housing.

6. The indoor unit as described in any one of claims 1-5, characterized in that, The at least one air outlet includes an upper air outlet and a lower air outlet. The at least one air supply component includes a first air supply component and a second air supply component. The second fan of the first air supply component and the second fan of the second air supply component are located on the same side wall and arranged vertically. The second fan of the first air supply component is set to correspond to the upper air outlet, and the second fan of the second air supply component is set to correspond to the lower air outlet.

7. The indoor unit as described in claim 6, characterized in that, The indoor unit also includes: The control module is connected to both the first air supply component and the second air supply component, and is used to control the operating status of the upper fan and / or the lower fan.

8. The indoor unit as described in claim 7, characterized in that, The indoor unit also includes: A detection device is installed between the air outlet of the first air supply component and the air outlet of the second air supply component to detect whether there is a person in the air supply direction of the indoor unit. The detection device is connected to the control module, and the control module controls the operating status of the upper fan and / or the lower fan according to the detection signal of the detection device.

9. An air supply method for an indoor unit, characterized in that, The indoor unit includes a housing, the housing having at least one air inlet and at least one air outlet. The indoor unit also includes at least one air supply assembly, the air supply assembly including: an air duct connecting the air inlet and the air outlet, and a second fan and a first fan disposed on the air duct; wherein: the first fan is disposed corresponding to the position of the air inlet, and the second fan is disposed corresponding to the position of the air outlet; the air supply direction of the first fan and the air supply direction of the second fan are the same, and the fan blade size of the second fan is smaller than the fan blade size of the first fan; the first fan is used to pressurize the airflow entering the air duct for the first time; the second fan is used to pressurize the airflow blown out from the first fan for the second time; the air supply assembly further includes: an air outlet grille disposed at the air outlet, and the second fan disposed at the center of the air outlet grille; the air outlet grille includes an outer frame, a core frame, and a plurality of grille strips connecting the outer frame and the core frame; the outer frame is disposed at the air outlet; the second fan is fixed on the core frame; the method includes: In response to a long-distance air supply command, the second fan of the air supply assembly associated with the long-distance air supply command is controlled to repressurize the airflow blown out by the first fan.

10. The method as described in claim 9, characterized in that, The at least one air outlet includes an upper air outlet and a lower air outlet, and the at least one air supply component includes a first air supply component and a second air supply component. The first air supply component and the second air supply component are located on the same side wall and are arranged vertically. The first air supply component corresponds to the upper air outlet, and the second air supply component corresponds to the lower air outlet. The long-distance air supply command includes a primary long-distance air supply command; the step of controlling the second fan of the air supply component associated with the long-distance air supply command to perform secondary pressurization on the airflow blown out by the first fan, in response to the long-distance air supply command, includes: In response to the primary long-distance air supply command, the second fan of the first air supply component is controlled to operate at a first set speed to further pressurize the airflow blown out by the first fan.

11. The method as described in claim 10, characterized in that, The long-distance air supply command includes a secondary long-distance air supply command; the step of controlling the second fan of the air supply component associated with the long-distance air supply command to further pressurize the airflow blown out by the first fan in response to the long-distance air supply command includes: In response to the secondary long-distance air supply command, both the second fan of the first air supply assembly and the second fan of the second air supply assembly are controlled to operate at a second set speed; or, The second fan of the first air supply assembly is controlled to operate at the second set speed; Detect whether there is anyone in the direction of the air outlet of the indoor unit; If there are people in the air outlet direction, the second fan of the second air supply assembly is turned off; or, When there is no one in the air outlet direction, the second fan of the second air supply assembly is operated at the second set speed.

12. The method as described in claim 11, characterized in that, The detection of whether there is a person in the air outlet direction of the indoor unit includes: The system detects whether there are people in the direction of the air outlet of the indoor unit at set time intervals.

13. The method as described in claim 11, characterized in that, The first set rotation speed is determined based on the set air delivery distance of the first air delivery component; the second set rotation speed is determined based on the set air delivery distance of the second air delivery component.

14. An air conditioner, characterized in that, The air conditioner includes an indoor unit as described in any one of claims 1-8; or, The air conditioner uses the method described in any one of claims 9-13.

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