Air conditioner indoor unit, air conditioner and air conditioner control method

Abstract

The present invention provides an air-conditioning indoor unit, an air conditioner and an air-conditioning control method. The air-conditioning indoor unit comprises: a main air duct, the main air duct has a first main air outlet; a fresh air duct, the fresh air duct has a fresh air outlet; an auxiliary air duct, the auxiliary air duct is connected to the main air duct in an on-off manner, and the auxiliary air duct has an auxiliary air outlet; wherein the first main air outlet and the auxiliary air outlet are arranged around the fresh air outlet to solve the problem of air supply temperature stratification that is easy to occur in the air conditioner in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, and in particular to an air conditioning indoor unit, an air conditioner and an air conditioning control method. Background Art

[0002] As the market demand for air conditioning comfort and health becomes higher and higher, the traditional air conditioning temperature drop / temperature rise mode can no longer meet user needs. Traditional household air conditioners generally use air internal circulation to adjust. When the air conditioner is running for a long time in a closed space, pollutants such as dust and germs cannot be discharged outdoors, resulting in increased indoor pollutants and CO2 concentrations, reduced indoor air quality, and the risk of air conditioning disease. Therefore, fresh air purification air conditioners are currently a hot spot for the development of healthy air conditioners.

[0003] However, when the indoor unit of the air conditioner introduces fresh air from the outside, due to the large temperature difference between the indoor and outdoor environments, obvious temperature stratification is likely to occur when the fresh air outlet and the main air outlet of the air conditioner deliver air at the same time. Especially when heating in winter, there will be a situation where fresh air is at the bottom and hot air is at the top, resulting in an obvious phenomenon of hot head and cold feet, thereby reducing the thermal comfort of the human body. Summary of the invention

[0004] The main purpose of the present invention is to provide an air conditioner indoor unit, an air conditioner and an air conditioner control method to solve the problem that air supply temperature stratification is prone to occur in air conditioners in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an air-conditioning indoor unit is provided, comprising: a main air duct, the main air duct having a first main air outlet; a fresh air duct, the fresh air duct having a fresh air outlet; an auxiliary air duct, the auxiliary air duct being connectable and disconnectable to the main air duct, the auxiliary air duct having an auxiliary air outlet; wherein the first main air outlet and the auxiliary air outlet are arranged around the fresh air outlet.

[0006] Furthermore, there is one first main air outlet and one auxiliary air outlet, and the first main air outlet and the auxiliary air outlet are respectively located on opposite sides of the fresh air outlet; or there is one first main air outlet and two auxiliary air outlets, which are arranged at intervals in the horizontal direction; and each auxiliary air outlet is arranged around the fresh air outlet.

[0007] Furthermore, the first main air outlet is located above the fresh air outlet; and / or the auxiliary air outlet is located below the fresh air outlet.

[0008] Furthermore, the auxiliary air duct is independently arranged from the main air duct; and / or the auxiliary air duct is independently arranged from the fresh air duct.

[0009] Furthermore, in the volute assembly, the main air duct is arranged in the volute assembly, and the auxiliary air inlet of the auxiliary air duct is arranged on the volute wall of the volute assembly.

[0010] Furthermore, the auxiliary air inlet is strip-shaped, and the extension direction of the auxiliary air inlet is parallel to the air outlet direction of the first main air outlet; there are multiple auxiliary air inlets, and the multiple auxiliary air inlets are arranged around the first main air outlet.

[0011] Furthermore, the volute assembly includes an air outlet and a volute end located inside the air outlet, and the first main air outlet is surrounded by the air outlet so that the airflow in the volute end flows out after passing through the air outlet; the auxiliary air inlet is arranged on the volute end.

[0012] Furthermore, the fresh air duct includes a first fresh air section and a second fresh air section, the first fresh air section is located on a side of the main air duct away from the first main air outlet, and the second fresh air section is located below the main air duct; wherein, one end of the auxiliary air inlet is located on the inner side of the first main air outlet, and the other end of the auxiliary air inlet extends toward the first fresh air section.

[0013] Furthermore, an auxiliary air duct component is provided, the auxiliary air duct component is connected to the volute assembly, and the auxiliary air duct and the auxiliary air outlet are both provided on the auxiliary air duct component.

[0014] Furthermore, the auxiliary air duct component is arranged below the volute assembly.

[0015] Furthermore, the air conditioner indoor unit also includes a base, and the auxiliary air duct and the auxiliary air outlet are surrounded by the base and the volute assembly.

[0016] Furthermore, the auxiliary air duct has an auxiliary air inlet for communicating with the main air duct, and the air conditioner indoor unit also includes: an auxiliary baffle, which is movably arranged at the auxiliary air inlet to open or close the auxiliary air inlet.

[0017] Further, the auxiliary baffle is movably arranged; or the auxiliary baffle is rotatably arranged.

[0018] Further, a stepper motor is connected to the auxiliary baffle to drive the auxiliary baffle to move to open or close the auxiliary air inlet.

[0019] Furthermore, the main air duct has a second main air outlet, the second main air outlet is arranged at the top of the main air duct, and the first main air outlet is arranged at the bottom of the main air duct; and / or there are multiple main air ducts, and each main air duct is arranged independently of each other; the air-conditioning indoor unit includes a first volute, a second volute and a wind shield which are arranged in sequence, and each main air duct includes a first air duct section and a second air duct section which are interconnected, the first air duct section is arranged between the first volute and the second volute, and the second air duct section is arranged between the second volute and the wind shield.

[0020] According to a second aspect of the present invention, there is provided an air conditioner, comprising an air conditioner indoor unit and an air conditioner outdoor unit connected by a refrigerant pipe.

[0021] According to a third aspect of the present invention, an air conditioning control method is provided, the air conditioning control method comprising: when a fresh air duct of an air conditioning indoor unit is in a ventilation state, detecting an operation mode of the air conditioning indoor unit; the operation mode comprises a heating operation and a cooling operation; when the air conditioning indoor unit is in a cooling operation mode, controlling an auxiliary air duct and a main air duct of the air conditioning indoor unit to be in a separated state; when the air conditioning indoor unit is in a heating operation mode, detecting a fresh air temperature T of fresh air flowing through the fresh air duct w , Indoor ambient temperature T n , the air supply temperature T of the main air duct of the air conditioner indoor unit c , so as to control the auxiliary air duct and the main air duct of the air conditioner indoor unit to be in a separated state or a connected state according to the detection results.

[0022] Furthermore, when the indoor unit of the air conditioner is in a heating operation mode, the air conditioner control method includes: obtaining a supply air temperature difference ΔT=T c -T w ; Determine the size between the supply air temperature difference △T and the first predetermined supply air temperature difference △T1, so that when the supply air temperature difference △T is less than the first predetermined supply air temperature difference △T1, the auxiliary air duct and the main air duct are controlled to be in a separated state.

[0023] Furthermore, the air conditioning control method further comprises: when the air supply temperature difference ΔT is greater than or equal to the first predetermined air supply temperature difference ΔT1, determining that the indoor environment temperature T n and the predetermined indoor ambient temperature T2; at the indoor ambient temperature T n When the temperature of the indoor environment is lower than the first predetermined indoor environment temperature T2, the auxiliary air duct is controlled to be in a separated state from the main air duct; otherwise, the auxiliary air duct is controlled to be in a connected state with the main air duct.

[0024] Furthermore, when the auxiliary air duct and the main air duct are in a conducting state, the air conditioning control method further includes: obtaining the supply air temperature difference ΔT=T c -T w and the operating windshield of the air-conditioning indoor unit; according to the air supply temperature difference △T and the size of the operating windshield, the opening size of the auxiliary air inlet connecting the auxiliary air duct and the main air duct is controlled.

[0025] Furthermore, the air conditioning control method further includes: after the air conditioning indoor unit stops heating operation or closes the fresh air duct, controlling the auxiliary air duct and the main air duct to be in a separated state.

[0026] Furthermore, the air-conditioning indoor unit has an upper air outlet and a lower air outlet, and the air-conditioning indoor unit includes a single upper air outlet state in which the main air duct is separately connected to the upper air outlet, a single lower air outlet state in which the main air duct is separately connected to the lower air outlet, and an upper and lower air outlet state in which the main air duct is connected to both the upper air outlet and the lower air outlet. The air-conditioning control method also includes: when the air-conditioning indoor unit is in a cooling operation mode, controlling the air-conditioning indoor unit to be in a single upper air outlet state; when the air-conditioning indoor unit is in a heating operation mode, controlling the air-conditioning indoor unit to be in a single lower air outlet state.

[0027] Furthermore, the air conditioning control method further includes: when the air conditioning indoor unit is in the cooling operation mode, detecting the fresh air temperature T of the fresh air flowing through the fresh air duct w , Indoor ambient temperature T n , the air supply temperature T of the main air duct of the air conditioner indoor unit c ; Get the supply air temperature difference △T=T c -T w ; Determine the size between the supply air temperature difference △T and the second predetermined supply air temperature difference △T3, so that when the supply air temperature difference △T is less than the second predetermined supply air temperature difference △T3, control the air conditioner indoor unit to maintain the single upper air outlet state.

[0028] Furthermore, the air conditioning control method further includes: when the air supply temperature difference ΔT is greater than or equal to the second predetermined air supply temperature difference ΔT3, determining that the indoor environment temperature T n and the predetermined indoor ambient temperature T4; when the indoor ambient temperature T n When the indoor temperature is lower than the predetermined indoor environment temperature T4, the air conditioner indoor unit is controlled to maintain the single upper air outlet state; otherwise, the air conditioner indoor unit is controlled to be in the single lower air outlet state or the upper and lower air outlet state.

[0029] By applying the technical solution of the present invention, the present invention provides an air conditioner indoor unit including a main air duct, a fresh air duct and an auxiliary air duct, wherein the main air duct has a first main air outlet; the fresh air duct has a fresh air outlet; the auxiliary air duct is connected to the main air duct in a switchable manner, and the auxiliary air duct has an auxiliary air outlet, wherein the first main air outlet and the auxiliary air outlet are arranged around the fresh air outlet. In this way, part of the airflow in the main air duct is guided to the auxiliary air outlet through the auxiliary air duct and then discharged, so that the fresh air blown out of the fresh air outlet is between the two airflows originating from the main air duct of the air conditioner, so that when the air conditioner is heating and delivering fresh air in winter, the fresh air and the hot air are fully mixed to avoid temperature stratification, thereby solving the problem of reduced indoor comfort caused by temperature stratification during fresh air operation of the air conditioner in the prior art. At the same time, through the air-conditioning control method provided by the present invention, when the fresh air function of the air conditioner is turned on, the opening and closing of the auxiliary air duct and the amount of induced air are controlled according to the air-conditioning operation mode, the temperature difference between the outdoor fresh air temperature and the air supply temperature of the main air duct of the air conditioner, and the air volume, so that the airflow blown out of the main air duct of the air conditioner and the airflow blown out of the fresh air duct are fully mixed, and the temperature difference between the outdoor fresh air temperature and the air supply temperature of the main air duct of the air conditioner is reduced, thereby solving the problem of severe temperature stratification when the air conditioner supplies fresh air, and improving the indoor fresh air purification effect and the thermal comfort of the human body indoors. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A schematic structural diagram of an auxiliary air duct according to an embodiment of an air conditioner indoor unit of the present invention is shown;

[0032] Figure 2 A schematic diagram showing the positions of the air inlet and the air outlet of the auxiliary air duct according to an embodiment of the air conditioner indoor unit of the present invention is shown;

[0033] Figure 3 A schematic diagram showing the flow of air in each air duct structure according to an embodiment of an indoor unit of an air conditioner according to the present invention is shown;

[0034] Figure 4 A schematic diagram showing the structure and control of an auxiliary air duct air inlet according to an embodiment of an air conditioner indoor unit of the present invention is shown;

[0035] Figure 5 A schematic diagram showing the position of the auxiliary air outlet of the first embodiment of the air conditioner indoor unit according to the present invention;

[0036] Figure 6 A schematic diagram showing the position of the auxiliary air outlet of the second embodiment of the air conditioner indoor unit according to the present invention is shown;

[0037] Figure 7 A schematic diagram of the control logic flow of the air conditioning system during heating operation according to an embodiment of the air conditioning control method of the present invention is shown;

[0038] Figure 8 A schematic diagram of the control logic flow of the air conditioning system during cooling operation according to an embodiment of the air conditioning control method of the present invention is shown;

[0039] Fig. 9 A first position diagram of a fresh air outlet and a main air outlet of an embodiment of an air conditioner indoor unit according to the prior art is shown;

[0040] Fig.10 A second position diagram of the fresh air outlet and the main air outlet of an embodiment of an air conditioner indoor unit according to the prior art is shown; and

[0041] Fig.11 A schematic diagram of airflow in each air duct structure of an embodiment of an air conditioner indoor unit according to the prior art is shown.

[0042] The above drawings include the following reference numerals:

[0043] 10', volute assembly; 20', base; 101', first main air outlet; 100', main air duct; 200', fresh air duct; 201', fresh air outlet;

[0044] 10. Volute assembly; 11. First volute; 12. Second volute; 100. Main air duct; 101. First main air outlet; 102. Second main air outlet; 110. Air outlet; 111. Volute end; 20. Base; 200. Fresh air duct; 201. Fresh air outlet; 210. First fresh air section; 220. Second fresh air section; 30. Auxiliary air duct component; 31. Auxiliary baffle; 300. Auxiliary air duct; 301. Auxiliary air outlet; 302. Auxiliary air inlet; 50. Fan component. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] In the prior art, please refer to Figures 9 to 11The air conditioner indoor unit in the prior art includes: a volute assembly 10', the volute assembly 10' is used to enclose a main air duct 100' and a first main air outlet 101' connected to the main air duct 100'; a base 20', the base 20' and the volute assembly 10' enclose a fresh air duct 200' and a fresh air outlet 201' connected to the fresh air duct 200'; wherein the fresh air outlet 201' is located below the first main air outlet 101'. Since the first main air outlet 101' is above the fresh air outlet 201', and the main air volume is much larger than the fresh air volume, when the air conditioner is in the heating state, the first main air outlet 101' sends hot air continuously upward, while the fresh air outlet 201' sends cold air continuously downward, resulting in a large vertical air temperature difference in the room.

[0047] like Fig.11 As shown in the figure, when designing the fresh air duct or fresh air outlet, designing a certain air supply angle to blow toward the mainstream can mix the fresh air with the airflow blown out of the main air duct to a certain extent. However, due to the large difference in air volume, the fresh air beam has little effect on the axial velocity of the main air supply, and the cold air is blocked from moving upward at the front end of the air conditioning jet supply, and the vertical temperature difference is still large. In the case where the relative position of the air conditioning fresh air outlet and the main air duct outlet cannot be changed, no effective solution has been proposed so far.

[0048] Therefore, by designing a "fresh air auxiliary mixing duct", another air beam is added to allow the fresh air and hot air to be fully mixed and exchanged for heat, thereby reducing the vertical air temperature difference.

[0049] Please refer to Figures 1 to 6 The present invention provides an air conditioner indoor unit, comprising: a main air duct 100, the main air duct 100 having a first main air outlet 101; a fresh air duct 200, the fresh air duct 200 having a fresh air outlet 201; an auxiliary air duct 300, the auxiliary air duct 300 is connected to the main air duct 100 in an on-off manner, and the auxiliary air duct 301 has an auxiliary air outlet 301; wherein the first main air outlet 101 and the auxiliary air outlet 301 are arranged around the fresh air outlet 201.

[0050] The present invention provides an air conditioner indoor unit including a main air duct 100, a fresh air duct 200 and an auxiliary air duct 300, wherein the main air duct 100 has a first main air outlet 101; the fresh air duct 200 has a fresh air outlet 201; the auxiliary air duct 300 is connected to the main air duct 100 in a disconnectable manner, and the auxiliary air duct 300 has an auxiliary air outlet 301, wherein the first main air outlet 101 and the auxiliary air outlet 301 are arranged around the fresh air outlet 201. In this way, part of the airflow in the main air duct 100 is guided to the auxiliary air outlet 301 through the auxiliary air duct 300 and then discharged, so that the fresh air blown out of the fresh air outlet 201 is between two airflows originating from the main air duct 100 of the air conditioner, so that when the air conditioner is used for heating and delivering fresh air in winter, the fresh air and the hot air are fully mixed to avoid temperature stratification, thereby solving the problem of reduced indoor comfort caused by temperature stratification during fresh air operation of the air conditioner in the prior art.

[0051] In an embodiment of the present invention, the air-conditioning indoor unit includes a fan component 50, the fan component 50 includes an upper fan and a lower fan, the main air duct 100 includes an upper fan duct and a lower fan duct separated by a partition, and the first main air outlet 101 includes a first lower air outlet and a second lower air outlet at least partially separated by a partition, wherein the first lower air outlet is located above the second lower air outlet, the first lower air outlet is connected to the upper fan duct, the second lower air outlet is connected to the lower fan duct, and the first lower air outlet and the second lower air outlet are connected to each other to form the first main air outlet 101.

[0052] Specifically, there is one first main air outlet 101 and one auxiliary air outlet 301, and the first main air outlet 101 and the auxiliary air outlet 301 are respectively located on the opposite sides of the fresh air outlet 201; or there is one first main air outlet 101 and two auxiliary air outlets 301, which are arranged at intervals in the horizontal direction; each auxiliary air outlet 301 is arranged around the fresh air outlet 201.

[0053] Preferably, the first main air outlet 101 is located above the fresh air outlet 201; and / or the auxiliary air outlet 301 is located below the fresh air outlet 201. In this way, air can be drawn from the main air duct 100 to below the fresh air outlet 201. At this time, the air flow temperature of the auxiliary air duct 300 is the same as the air flow temperature of the main air duct 100, so that the air-conditioned fresh air is between the two air flows originating from the main air duct 100, so that when the air conditioner is heating and delivering fresh air in winter, the fresh air and the hot air are fully mixed to avoid temperature stratification and the phenomenon of hot head and cold feet.

[0054] like Figure 2 and Figure 3 As shown, the hot air from the auxiliary air duct 300 is introduced into the main air duct 100 , that is, a hole is opened in the main air duct 100 to introduce the air, and the air is delivered below the air-conditioning fresh air outlet 201 .

[0055] In an implementation of the present invention, the auxiliary air duct 300 is independently provided with the main air duct 100 ; and / or the auxiliary air duct 300 is independently provided with the fresh air duct 200 .

[0056] In another implementation of the present invention, the auxiliary air inlet 302 can be arranged to be interconnected with the fresh air duct 200, so that at least part of the airflow in the fresh air duct 200 is mixed with the airflow in the auxiliary air duct 300 and then flows out, and another part of the airflow in the fresh air duct 200 flows out at the fresh air outlet 201.

[0057] Specifically, the air conditioner indoor unit includes: a volute assembly 10 , a main air duct 100 is arranged in the volute assembly 10 , and an auxiliary air inlet 302 of the auxiliary air duct 300 is arranged on the volute wall of the volute assembly 10 .

[0058] Specifically, the volute assembly 10 includes an air outlet portion 110 and a volute end portion 111 located inside the air outlet portion 110 , and the first main air outlet 101 is surrounded by the air outlet portion 110 so that the airflow in the volute end portion 111 flows out after passing through the air outlet portion 110 ; the auxiliary air inlet 302 is arranged on the volute end portion 111 .

[0059] Preferably, if Figure 3 As shown, the auxiliary air duct 300 and the auxiliary air inlet 302 are independently arranged from the fresh air duct 200, that is, the auxiliary air duct 300 and the auxiliary air inlet 302 are arranged away from the fresh air duct 200; at the same time, the auxiliary air inlet 302 is strip-shaped, and the extension direction of the auxiliary air inlet 302 is parallel to the outlet direction of the first main air outlet 101, so that the influence of the auxiliary air inlet 302 on the air supply of the main air duct 100 can be minimized. There are multiple auxiliary air inlets 302, and the multiple auxiliary air inlets 302 are arranged around the first main air outlet 101.

[0060] Specifically, the opening of the auxiliary air inlet 302 is far away from the edge of the auxiliary air outlet 301. In order to avoid excessive local stress, the limit position of the auxiliary air inlet 302 is located at the position of the volute end 111. In addition, the profile of the auxiliary air duct 300 is matched with the incoming wind direction of the main air duct 100 to reduce local vortex and reduce noise.

[0061] like Figure 3 As shown, the fresh air duct 200 includes a first fresh air section 210 and a second fresh air section 220. The first fresh air section 210 is located on a side of the main air duct 100 away from the first main air outlet 101, and the second fresh air section 220 is located below the main air duct 100; wherein, one end of the auxiliary air inlet 302 is located on the inner side of the first main air outlet 101, and the other end of the auxiliary air inlet 302 extends toward the first fresh air section 210.

[0062] In an embodiment of the present invention, the air conditioner indoor unit further includes an auxiliary air duct component 30, the auxiliary air duct component 30 is connected to the volute assembly 10, and the auxiliary air duct 300 and the auxiliary air outlet 301 are both arranged on the auxiliary air duct component 30. Specifically, the auxiliary air duct component 30 is arranged below the volute assembly 10.

[0063] Specifically, the air conditioner indoor unit further includes a base 20 , and the auxiliary air duct 300 and the auxiliary air outlet 301 are surrounded by the base 20 and the volute assembly 10 .

[0064] In an embodiment of the present invention, Figure 4 As shown, the auxiliary air duct 300 has an auxiliary air inlet 302 for communicating with the main air duct 100. Preferably, the air conditioner indoor unit also includes: an auxiliary baffle 31, which is movably arranged at the auxiliary air inlet 302 to open or close the auxiliary air inlet 302.

[0065] Specifically, the air conditioner indoor unit of the present invention further includes a stepper motor, which is connected to the auxiliary baffle 31 to drive the auxiliary baffle 31 to move to open or close the auxiliary air inlet 302. In addition, the size of the opening area of ​​the auxiliary air inlet 302 can be controlled by the stepper motor, thereby realizing the control of the air volume of the auxiliary air duct 300.

[0066] like Figure 4 As shown, L0 is the total width of the auxiliary air inlet 302, L1 is the total length of the auxiliary air inlet 302, and L x It is the actual width of the auxiliary air inlet 302; wherein, the direction of the total length L1 is the same as the air outlet direction of the first main air outlet 101, and the direction of the total width L0 is perpendicular to the direction of the total length L1.

[0067] Therefore, S = L x * L1 is the actual area of ​​the auxiliary air inlet 302. The actual area S of the auxiliary air inlet 302 is determined by the air supply temperature T of the main air duct 100 of the air conditioner indoor unit. c , the air volume m blown out by the fan component 50 corresponding to the main air duct 100 of the air conditioner and the fresh air temperature T of the fresh air flowing through the fresh air duct 200 w Decide that they have the following relationship:

[0068]

[0069] a=f(L0,L1,S z )

[0070]

[0071] Specifically, k represents the actual induced air volume coefficient, a represents the induced air volume coefficient when the auxiliary air inlet 302 is fully opened, S zis the area of ​​the first main air outlet 101, c1 to c 10 is the fitting coefficient. Among them, a and L0, L1, S z The actual induced draft coefficient k is related to T c , T w , a is related to the formula for fitting the nonlinear change curve of k value, which is used for actual operation control.

[0072] By comparing T w and T c The size of the temperature difference is used to control the size of the induced air volume of the auxiliary air duct 300. When the temperature difference is large, the induced air volume is increased, and when the temperature difference is small, the induced air volume is reduced. That is, by increasing or decreasing L x To increase or decrease the air volume.

[0073] Preferably, the auxiliary baffle 31 is movably provided; or the auxiliary baffle 31 is rotatably provided.

[0074] like Figure 5 As shown, in the first embodiment of the present invention, there is one auxiliary air outlet 301 , and the auxiliary air outlet 301 is arranged directly below the fresh air outlet 201 .

[0075] like Figure 6 As shown, in the second embodiment of the present invention, there are two auxiliary air outlets 301, and the two auxiliary air outlets 301 are symmetrically arranged relative to the center line of the base 20, so as to form two jets.

[0076] In an embodiment of the present invention, the main air duct 100 has a second main air outlet 102, the second main air outlet 102 is arranged at the top of the main air duct 100, and the first main air outlet 101 is arranged at the bottom of the main air duct 100; and / or there are multiple main air ducts 100, and each main air duct 100 is arranged independently of each other; the air-conditioning indoor unit includes a first volute 11, a second volute 12 and a wind shield which are arranged in sequence, and each main air duct 100 includes a first air duct section and a second air duct section which are interconnected, the first air duct section is arranged between the first volute 11 and the second volute 12, and the second air duct section is arranged between the second volute 12 and the wind shield.

[0077] According to a second aspect of the present invention, there is provided an air conditioner, comprising an air conditioner indoor unit and an air conditioner outdoor unit connected by a refrigerant pipe, wherein the air conditioner indoor unit is the air conditioner indoor unit described above.

[0078] According to the third aspect of the present invention, please refer to Figure 7 and Figure 8 , provides an air conditioning control method suitable for the above-mentioned air conditioning indoor unit, so that it can take into account both the indoor fresh air purification effect and the room thermal comfort.

[0079] The air conditioning control method includes: when the fresh air duct 200 of the air conditioning indoor unit is in a ventilation state, detecting the operation mode of the air conditioning indoor unit; the operation mode includes heating operation and cooling operation; when the air conditioning indoor unit is in the cooling operation mode, controlling the auxiliary air duct 300 of the air conditioning indoor unit and the main air duct 100 to be in a separated state; when the air conditioning indoor unit is in the heating operation mode, detecting the fresh air temperature T of the fresh air flowing through the fresh air duct 200 w , Indoor ambient temperature T n , the air supply temperature T of the main air duct 100 of the air conditioner indoor unit c , so as to control the auxiliary air duct 300 and the main air duct 100 of the air conditioner indoor unit to be in a separated state or a connected state according to the detection result.

[0080] like Figure 8 As shown, when the air conditioner is in cooling operation mode and the fresh air function is turned on, the moving closing plate (auxiliary baffle 31) is closed, and the fresh air auxiliary mixed air supply function is turned off, and the auxiliary air duct 300 and the main air duct 100 are controlled to be in a separated state.

[0081] like Figure 7 As shown, when the indoor unit of the air conditioner is in the heating operation mode, after detecting and judging that the air conditioner is in the single downward air outlet mode, the fresh air temperature T is detected and recorded. w , Indoor ambient temperature T n , the air supply temperature T of the main air duct 100 of the air conditioner indoor unit c , air supply temperature difference △T=T c -T w , the air volume m blown out by the corresponding windshield of the fan component 50 corresponding to the main air duct 100 of the air conditioner, the air conditioning control method includes: obtaining the air supply temperature difference △T=T c -T w ; Determine the size between the supply air temperature difference △T and the first predetermined supply air temperature difference △T1, so that when the supply air temperature difference △T is less than the first predetermined supply air temperature difference △T1, control the auxiliary air duct 300 and the main air duct 100 to be in a separated state.

[0082] Specifically, when the air supply temperature difference ΔT is less than the first predetermined air supply temperature difference ΔT1, the moving closing plate (auxiliary baffle 31) is closed, and the fresh air auxiliary mixed air supply function is closed, that is, at this time, the auxiliary air duct 300 and the main air duct 100 are in a separated state. w The air supply temperature T of the main air duct 100 c The temperature difference between the two is small, and the problem of uneven mixing of fresh air and cold air can be improved through the original air duct structure. The air conditioner closes the moving closing plate (auxiliary baffle 31), and turns off the fresh air auxiliary mixing air supply function, and maintains the current state to continue heating operation.

[0083] Furthermore, the air conditioning control method further comprises: when the air supply temperature difference ΔT is greater than or equal to the first predetermined air supply temperature difference ΔT1, determining that the indoor environment temperature T n and the predetermined indoor ambient temperature T2; at the indoor ambient temperature T n When the temperature of the indoor environment is lower than the first predetermined indoor environment temperature T2, the auxiliary air duct 300 is controlled to be separated from the main air duct 100; otherwise, the auxiliary air duct 300 is controlled to be connected to the main air duct 100.

[0084] Specifically, at the indoor ambient temperature T n When the indoor ambient temperature is lower than the first predetermined indoor ambient temperature T2, the moving closing plate (auxiliary baffle 31) is closed, and the fresh air auxiliary mixed air supply function is closed, so that the auxiliary air duct 300 and the main air duct 100 are in a separated state; when the indoor ambient temperature T n When the temperature is greater than or equal to the first predetermined indoor ambient temperature T2, the moving closing plate (auxiliary baffle 31) is opened to start the fresh air auxiliary mixed air supply function, so that the auxiliary air duct 300 and the main air duct 100 are in a conducting state.

[0085] When the supply air temperature difference △T is greater than or equal to the first predetermined supply air temperature difference △T1, the fresh air temperature T w The air supply temperature T of the main air duct 100 c The temperature difference between them is large, and the air conditioner needs to solve the problem of air supply temperature stratification. It is necessary to continue to determine the current indoor ambient temperature T n The relationship between the temperature and the predetermined indoor ambient temperature T2.

[0086] At indoor ambient temperature T n When the current indoor ambient temperature T is lower than the first predetermined indoor ambient temperature T2, the current indoor ambient temperature T n When the temperature is lower than the comfortable temperature, the indoor temperature should be quickly raised. The air conditioner should close the movement closing plate (auxiliary baffle 31) and the fresh air auxiliary mixed air supply function to maintain the current heating operation.

[0087] Furthermore, when the auxiliary air duct 300 and the main air duct 100 are in a conducting state, the air conditioning control method further includes: obtaining the air supply temperature difference ΔT=T c -T w according to the air supply temperature difference △T and the size of the running windshield, control the auxiliary air duct 300 and the main air duct 100 connected to the auxiliary air inlet 302 opening size.

[0088] Among them, the running windshield of the indoor unit of the air conditioner is the running windshield of the fan component 50 of the main air duct 100.

[0089] At indoor ambient temperature T nWhen it is greater than or equal to the first predetermined indoor ambient temperature T2, the current indoor temperature is higher than the comfort temperature. At this time, the air conditioner opens the closed movement plate (auxiliary baffle 31) and starts the fresh air auxiliary mixed air supply function. The air conditioner continues to control the auxiliary mixing structure air outlet area S (that is, the actual air inlet area S of the auxiliary air inlet 302) according to the detected supply air temperature difference ΔT and the air volume m, and indirectly controls the air volume m2 by controlling the driving motor to fully mix the fresh air and the hot air for heat exchange, thereby reducing the temperature stratification phenomenon.

[0090] like Figure 4 As shown, the actual air inlet area S of the auxiliary air inlet 302 is L x *L1.

[0091] Furthermore, the air conditioning control method further includes: after the air conditioning indoor unit stops heating operation or closes the fresh air duct 200, controlling the auxiliary duct 300 to be separated from the main duct 100. At this time, the air conditioning closes the auxiliary baffle 31 and closes the fresh air auxiliary mixing function.

[0092] Due to the use of the air conditioner indoor unit structure and air conditioner control method of the present invention, the air conditioner turns on the fresh air during heating operation, and can adjust the fresh air temperature T of the fresh air flowing through the fresh air duct 200 according to the fresh air temperature T of the fresh air flowing through the fresh air duct 200. w The air supply temperature T c The temperature difference can effectively control the air supply volume of the auxiliary air duct 300, so that the fresh air is fully mixed with the air flow of the main air duct 100 of the air conditioner, thereby solving the problem of severe temperature stratification causing hot head and cold feet when the air conditioner is in heating operation and delivering fresh air, and improving the purification effect of indoor fresh air and the thermal comfort of indoor humans.

[0093] In an embodiment of the present invention, the air-conditioning indoor unit has an upper air outlet and a lower air outlet, and the air-conditioning indoor unit includes a single upper air outlet state in which the main air duct is separately connected to the upper air outlet, a single lower air outlet state in which the main air duct is separately connected to the lower air outlet, and an upper and lower air outlet state in which the main air duct is connected to both the upper air outlet and the lower air outlet. The air-conditioning control method also includes: when the air-conditioning indoor unit is in a cooling operation mode, controlling the air-conditioning indoor unit to be in a single upper air outlet state; when the air-conditioning indoor unit is in a heating operation mode, controlling the air-conditioning indoor unit to be in a single lower air outlet state.

[0094] like Figure 8 As shown, further, the air conditioning control method further includes: when the air conditioning indoor unit is in the cooling operation mode, detecting the fresh air temperature T of the fresh air flowing through the fresh air duct 200 w , Indoor ambient temperature T n , the air supply temperature T of the main air duct 100 of the air conditioner indoor unit c ; Get the supply air temperature difference △T=T c -T w; Determine the size between the supply air temperature difference △T and the second predetermined supply air temperature difference △T3, so that when the supply air temperature difference △T is less than the second predetermined supply air temperature difference △T3, control the air conditioner indoor unit to maintain the single upper air outlet state.

[0095] Specifically, when the indoor unit of the air conditioner is in the cooling operation mode, when the fresh air function is turned on, the moving closing plate (auxiliary baffle 31) is closed, and the fresh air auxiliary mixed air supply function is turned off, the air supply mode of the air conditioner is detected and judged to be single upper air supply. If it is single upper air supply, the fresh air temperature T is continuously detected and recorded. w , Indoor ambient temperature T n , the air supply temperature T of the main air duct 100 of the air conditioner c , air volume m, calculate the temperature difference ΔT between the fresh air and the main supply air temperature, and first determine the relationship between the supply air temperature difference ΔT and the preset temperature difference value ΔT3.

[0096] When the supply air temperature difference △T is less than the second predetermined supply air temperature difference △T3, the fresh air temperature T w The air supply temperature T of the main air duct of the air conditioner indoor unit c If the temperature difference between the two is small, the air conditioner maintains the current cooling operation.

[0097] Further, when the air supply temperature difference ΔT is greater than or equal to the second predetermined air supply temperature difference ΔT3, it is determined that the indoor environment temperature T n and the predetermined indoor ambient temperature T4; when the indoor ambient temperature T n When the indoor temperature is lower than the predetermined indoor ambient temperature T4, the air conditioner indoor unit is controlled to maintain the single upper air outlet state; otherwise, the air conditioner indoor unit is controlled to be in the single lower air outlet state or the upper and lower air outlet state.

[0098] Specifically, when the supply air temperature difference ΔT is greater than or equal to the second predetermined supply air temperature difference ΔT3, that is, the fresh air temperature T w The air supply temperature T c The temperature difference between the two is large, and the fresh air introduced from the outside causes the heat load at the bottom of the room to increase instead of decrease, thereby affecting the temperature drop rate of the human activity area. Then, the current indoor temperature value T is determined. n Relationship with the preset comfort temperature value T4.

[0099] When the indoor ambient temperature T n When the indoor temperature is lower than the preset indoor ambient temperature T4, the current indoor temperature has dropped to a comfortable temperature. At this time, the room heat load is low, and the fresh air heat load is in the indoor cold air return area, which can be quickly reduced to room temperature. Therefore, the air conditioner maintains the single upper air supply mode cooling operation to ensure that the cold air does not blow people; when the indoor ambient temperature T nWhen it is greater than or equal to the preset indoor ambient temperature T4, that is, the current indoor temperature is still high, the room heat load is large, and supplying fresh air to the room will affect the temperature drop rate of the human activity area. At this time, the air conditioner is adjusted to the single down air supply mode or the up and down air supply mode, giving priority to the heat load of the human activity area to ensure the temperature drop rate of the human activity area.

[0100] When it is detected that the room temperature reaches the predetermined indoor ambient temperature T4 or the fresh air function is turned off, the air conditioner reverts to the single upper air supply mode to achieve cooling without wind.

[0101] The air-conditioning indoor unit and air-conditioning control method provided by the present invention can draw air from the main air duct 100 to the bottom of the fresh air outlet 201 when the air-conditioning fresh air outlet 201 is below the first main air outlet 101, and when the fresh air function of the air-conditioning is turned on, the opening and closing of the auxiliary air duct 300 and the size of the induced air volume m2 are controlled according to the air-conditioning operation mode, the temperature difference between the outdoor fresh air temperature and the supply air temperature of the air-conditioning main air duct 100, and the air volume, so that the airflow blown out of the air-conditioning main air duct 100 and the airflow blown out of the fresh air duct 200 are fully mixed, and the temperature difference between the outdoor fresh air temperature and the supply air temperature of the air-conditioning main air duct 100 is reduced, thereby solving the problem of severe temperature stratification when the air-conditioning supplies fresh air, and improving the indoor fresh air purification effect and the thermal comfort of the human body indoors.

[0102] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0103] The present invention provides an air conditioner indoor unit including a main air duct 100, a fresh air duct 200 and an auxiliary air duct 300, wherein the main air duct 100 has a first main air outlet 101; the fresh air duct 200 has a fresh air outlet 201; the auxiliary air duct 300 is connected to the main air duct 100 in a disconnectable manner, and the auxiliary air duct 300 has an auxiliary air outlet 301, wherein the first main air outlet 101 and the auxiliary air outlet 301 are arranged around the fresh air outlet 201. In this way, part of the airflow in the main air duct 100 is guided to the auxiliary air outlet 301 through the auxiliary air duct 300 and then discharged, so that the fresh air blown out of the fresh air outlet 201 is between two airflows originating from the main air duct 100 of the air conditioner, so that when the air conditioner is used for heating and delivering fresh air in winter, the fresh air and the hot air are fully mixed to avoid temperature stratification, thereby solving the problem of reduced indoor comfort caused by temperature stratification during fresh air operation of the air conditioner in the prior art. At the same time, through the air conditioning control method provided by the present invention, when the fresh air function of the air conditioner is turned on, the opening and closing of the auxiliary air duct 300 and the size of the induced air volume m2 are controlled according to the air conditioning operation mode, the temperature difference between the outdoor fresh air temperature and the air supply temperature of the air conditioning main air duct 100, and the air volume, so that the airflow blown out of the air conditioning main air duct 100 and the airflow blown out of the fresh air duct 200 are fully mixed, and the temperature difference between the outdoor fresh air temperature and the air supply temperature of the air conditioning main air duct 100 is reduced, thereby solving the problem of severe temperature stratification when the air conditioner supplies fresh air, and improving the indoor fresh air purification effect and the thermal comfort of the human body indoors.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that: include: A main air duct (100), wherein the main air duct (100) has a first main air outlet (101); A fresh air duct (200), wherein the fresh air duct (200) has a fresh air outlet (201); An auxiliary air duct (300), the auxiliary air duct (300) being connectably connected to the main air duct (100), and the auxiliary air duct (300) having an auxiliary air outlet (301); Wherein, the first main air outlet (101) and the auxiliary air outlet (301) are arranged around the fresh air outlet (201).

2. The air conditioner indoor unit according to claim 1, characterized in that: The first main air outlet (101) and the auxiliary air outlet (301) are both one, and the first main air outlet (101) and the auxiliary air outlet (301) are respectively located on two opposite sides of the fresh air outlet (201); or There is one first main air outlet (101), and there are two auxiliary air outlets (301), which are arranged at intervals in the horizontal direction; each auxiliary air outlet (301) is arranged around the fresh air outlet (201).

3. The air conditioner indoor unit according to claim 1, characterized in that: The first main air outlet (101) is located above the fresh air outlet (201); and / or The auxiliary air outlet (301) is located below the fresh air outlet (201).

4. The air conditioner indoor unit according to claim 1, characterized in that: The auxiliary air duct (300) is independently arranged from the main air duct (100); and / or The auxiliary air duct (300) is arranged independently from the fresh air duct (200).

5. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit comprises: A volute assembly (10), wherein the main air duct (100) is arranged inside the volute assembly (10), and the auxiliary air inlet (302) of the auxiliary air duct (300) is arranged on the volute wall of the volute assembly (10).

6. The air conditioner indoor unit according to claim 5, characterized in that: The auxiliary air inlet (302) is strip-shaped, and the extension direction of the auxiliary air inlet (302) is parallel to the air outlet direction of the first main air outlet (101); There are a plurality of auxiliary air inlets (302), and the plurality of auxiliary air inlets (302) are arranged around the first main air outlet (101).

7. The air conditioner indoor unit according to claim 5, characterized in that: The volute assembly (10) comprises an air outlet portion (110) and a volute end portion (111) located inside the air outlet portion (110); the first main air outlet (101) is surrounded by the air outlet portion (110) so that the airflow in the volute end portion (111) flows out after passing through the air outlet portion (110); and the auxiliary air inlet (302) is arranged on the volute end portion (111).

8. The air conditioner indoor unit according to claim 5, characterized in that: The fresh air duct (200) comprises a first fresh air section (210) and a second fresh air section (220), wherein the first fresh air section (210) is located on a side of the main air duct (100) away from the first main air outlet (101), and the second fresh air section (220) is located below the main air duct (100); wherein one end of the auxiliary air inlet (302) is located on the inner side of the first main air outlet (101), and the other end of the auxiliary air inlet (302) extends toward the first fresh air section (210).

9. The air conditioner indoor unit according to claim 5, characterized in that: The air conditioner indoor unit also includes: An auxiliary air duct component (30), the auxiliary air duct component (30) is connected to the volute assembly (10), and the auxiliary air duct (300) and the auxiliary air outlet (301) are both arranged on the auxiliary air duct component (30).

10. The air conditioner indoor unit according to claim 9, characterized in that: The auxiliary air duct component (30) is arranged below the volute assembly (10).

11. The air conditioner indoor unit according to claim 5, characterized in that: The air conditioner indoor unit further comprises a base (20), and the auxiliary air duct (300) and the auxiliary air outlet (301) are surrounded by the base (20) and the volute assembly (10).

12. The air conditioner indoor unit according to any one of claims 1 to 11, characterized in that: The auxiliary air duct (300) has an auxiliary air inlet (302) for communicating with the main air duct (100), and the air conditioner indoor unit further includes: An auxiliary baffle (31), wherein the auxiliary baffle (31) is movably disposed at the auxiliary air inlet (302) to open or close the auxiliary air inlet (302).

13. The air conditioner indoor unit according to claim 12, characterized in that: The auxiliary baffle (31) is movably arranged; or The auxiliary baffle (31) is rotatably arranged.

14. The air conditioner indoor unit according to claim 12, characterized in that: The air conditioner indoor unit also includes: A stepper motor is connected to the auxiliary baffle (31) to drive the auxiliary baffle (31) to move so as to open or close the auxiliary air inlet (302).

15. The air conditioner indoor unit according to claim 1, characterized in that: The main air duct (100) has a second main air outlet (102), the second main air outlet (102) is arranged at the top of the main air duct (100), and the first main air outlet (101) is arranged at the bottom of the main air duct (100); and / or There are a plurality of main air ducts (100), and each of the main air ducts (100) is independently arranged; the air conditioner indoor unit comprises a first volute (11), a second volute (12), and a windshield plate which are arranged in sequence, and each of the main air ducts (100) comprises a first air duct section and a second air duct section which are interconnected, the first air duct section is arranged between the first volute (11) and the second volute (12), and the second air duct section is arranged between the second volute (12) and the windshield plate.

16. An air conditioner, comprising an air conditioner indoor unit and an air conditioner outdoor unit connected by a refrigerant pipe, characterized in that: The air-conditioning indoor unit is the air-conditioning indoor unit according to any one of claims 1 to 15.

17. An air conditioning control method, applicable to the air conditioning indoor unit according to any one of claims 1 to 15, characterized in that: The air conditioning control method comprises: When the fresh air duct (200) of the air conditioner indoor unit is in a ventilation state, detecting the operation mode of the air conditioner indoor unit; the operation mode includes heating operation and cooling operation; When the air conditioner indoor unit is in a cooling operation mode, the auxiliary air duct (300) and the main air duct (100) of the air conditioner indoor unit are controlled to be in a separated state; When the air conditioner indoor unit is in a heating operation mode, the fresh air temperature T of the fresh air flowing through the fresh air duct (200) is detected. w , Indoor ambient temperature T n , the air supply temperature T of the main air duct (100) of the air conditioner indoor unit c , so as to control the auxiliary air duct (300) and the main air duct (100) of the air conditioner indoor unit to be in a separated state or a connected state according to the detection result.

18. The air conditioning control method according to claim 17, characterized in that: When the air conditioner indoor unit is in a heating operation mode, the air conditioner control method includes: Get the supply air temperature difference △T=T c -T w ; The size between the supply air temperature difference ΔT and a first predetermined supply air temperature difference ΔT1 is judged, so that when the supply air temperature difference ΔT is smaller than the first predetermined supply air temperature difference ΔT1, the auxiliary air duct (300) and the main air duct (100) are controlled to be in a separated state.

19. The air conditioning control method according to claim 18, characterized in that: The air conditioning control method further includes: When the air supply temperature difference ΔT is greater than or equal to the first predetermined air supply temperature difference ΔT1, it is determined that the indoor environment temperature T n The difference between the temperature and the predetermined indoor ambient temperature T2; At the indoor ambient temperature T n When the indoor ambient temperature is lower than the first predetermined indoor ambient temperature T2, the auxiliary air duct (300) and the main air duct (100) are controlled to be in a separated state; otherwise, the auxiliary air duct (300) and the main air duct (100) are controlled to be in a conducting state.

20. The air conditioning control method according to claim 17, characterized in that: When the auxiliary air duct (300) and the main air duct (100) are in a conducting state, the air conditioning control method further comprises: Get the supply air temperature difference △T=T c -T w and an operating windshield of the indoor unit of the air conditioner; The opening size of the auxiliary air inlet (302) connecting the auxiliary air duct (300) and the main air duct (100) is controlled according to the air supply temperature difference ΔT and the size of the operating windshield.

21. The air conditioning control method according to claim 17, characterized in that: The air conditioning control method further includes: After the air conditioner indoor unit stops heating operation or closes the fresh air duct (200), the auxiliary air duct (300) and the main air duct (100) are controlled to be in a separated state.

22. The air conditioning control method according to claim 17, characterized in that: The air conditioner indoor unit has an upper air outlet and a lower air outlet, and the air conditioner indoor unit includes a single upper air outlet state in which the main air duct is connected to the upper air outlet alone, a single lower air outlet state in which the main air duct is connected to the lower air outlet alone, and an upper and lower air outlet state in which the main air duct is connected to both the upper air outlet and the lower air outlet. The air conditioning control method further includes: When the air conditioner indoor unit is in a cooling operation mode, controlling the air conditioner indoor unit to be in a single upper air outlet state; When the air-conditioning indoor unit is in a heating operation mode, the air-conditioning indoor unit is controlled to be in a single downward air outlet state.

23. The air conditioning control method according to claim 22, characterized in that: The air conditioning control method further includes: When the air conditioner indoor unit is in a cooling operation mode, the fresh air temperature T of the fresh air flowing through the fresh air duct (200) is detected. w , Indoor ambient temperature T n , the air supply temperature T of the main air duct (100) of the air conditioner indoor unit c ; Get the supply air temperature difference △T=T c -T w ; The size between the supply air temperature difference ΔT and a second predetermined supply air temperature difference ΔT3 is judged, so that when the supply air temperature difference ΔT is less than the second predetermined supply air temperature difference ΔT3, the air conditioner indoor unit is controlled to maintain a single upper air outlet state.

24. The air conditioning control method according to claim 23, characterized in that: The air conditioning control method further includes: When the air supply temperature difference ΔT is greater than or equal to the second predetermined air supply temperature difference ΔT3, it is determined that the indoor environment temperature T n The difference between the temperature and the predetermined indoor ambient temperature T4; When the indoor ambient temperature T n When the indoor ambient temperature is lower than the predetermined indoor ambient temperature T4, the air-conditioning indoor unit is controlled to maintain the single upper air outlet state; otherwise, the air-conditioning indoor unit is controlled to be in the single lower air outlet state or the upper and lower air outlet state.

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