Air conditioner indoor unit and air conditioner

Abstract

The air conditioner indoor unit comprises a machine shell, a heat exchanger, an air duct component, a centrifugal fan, a motor and an axial flow fan, and an air inlet and an air outlet are formed in the machine shell; the axial flow fan is arranged in the machine shell, the axial flow fan and the centrifugal fan are coaxially arranged, and air sucked by the axial flow fan is driven to be exhausted to the centrifugal fan when the axial flow fan rotates. According to the air conditioner indoor unit, the combined design of the centrifugal fan and the axial flow fan is adopted, and the axial flow fan is configured to drive air sucked by the axial flow fan to be exhausted to the centrifugal fan when the axial flow fan rotates, namely air flow is gathered to the centrifugal fan, so that the air supply amount and the air supply distance of the centrifugal fan are increased, and the air supply efficiency is improved; the performance of the air conditioner is improved; compared with a centrifugal fan, the axial fan occupies a small space, has small influence on the volume of the indoor unit, and does not excessively increase the volume of the indoor unit.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air conditioning technical field, concretely relates to air conditioner indoor unit and air conditioner. BACKGROUND

[0002] With the development of technology, and the need of production and life, the structure of air conditioner is more and more diversified, including traditional wall-mounted air conditioner and stand-type air conditioner, window air conditioner and ceiling type air conditioner have also been widely used.

[0003] The ceiling type air conditioner is a kind of ceiling type air conditioner, and the ceiling type air conditioner can also be called ceiling type air conditioner, and the unit is arranged in the ceiling.

[0004] In the related art, for the ceiling type air conditioner indoor unit using centrifugal fan, if the air volume is increased and the heat exchange effect is improved, the number of centrifugal fans is usually increased or the size of centrifugal fan is increased to realize, the number of air duct components is increased or the size of air duct components is increased, the volume of indoor unit is increased, the indoor space is increased, which is not conducive to the miniaturization design of air conditioner, and the cost is increased.

[0005] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, therefore, it can include prior art known by those skilled in the art. SUMMARY

[0006] In view of the problems in the background art, the utility model provides an air conditioner indoor unit and air conditioner, which can increase the air supply and improve the performance of the air conditioner, and has little effect on the volume of the indoor unit.

[0007] To achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:

[0008] In some embodiments of the present application, an air conditioner indoor unit is provided, comprising:

[0009] A casing, provided with an air inlet and an air outlet;

[0010] A heat exchanger, arranged in the casing and located between the air inlet and the air outlet;

[0011] An air duct component, arranged in the casing, the air duct component defines an air duct therein, and the air duct communicates with the air inlet and the air outlet;

[0012] A centrifugal fan, arranged in the air duct, for driving air to enter the casing from the air inlet and flow out from the air outlet after heat exchange by the heat exchanger;

[0013] A motor, arranged in the casing, for driving the centrifugal fan to rotate;

[0014] An axial flow fan is arranged in the casing, and is configured to be coaxially arranged with the centrifugal fan and to drive the air sucked in to be discharged to the centrifugal fan when rotating.

[0015] The air conditioner indoor unit has the following advantages or beneficial effects:

[0016] The air conditioner indoor unit of the present application adopts the combined design of the centrifugal fan and the axial flow fan, and the axial flow fan is configured to drive the air sucked in to be discharged to the centrifugal fan when rotating, i.e. to gather the airflow to the centrifugal fan, which has the effect of air supplement to the centrifugal fan, thereby being conducive to increasing the air supply amount and air supply distance of the centrifugal fan and improving the air supply efficiency, and thus improving the performance of the air conditioner;

[0017] Compared with the centrifugal fan, the axial flow fan has a small size and occupies a small space, and compared with the related art of increasing the number or size of the centrifugal fan to increase the air supply amount, the axial flow fan has a small impact on the volume of the indoor unit and does not excessively increase the volume of the indoor unit;

[0018] Compared with the related art, under the premise of achieving the same heat exchange efficiency and heat exchange effect, the centrifugal fan can be operated at a lower speed, thereby being conducive to reducing the working noise of the fan, and thus being conducive to reducing the working noise of the air conditioner indoor unit.

[0019] In some embodiments of the present application, the centrifugal fan and the axial flow fan are both arranged on the motor shaft of the motor, the centrifugal fan is fixedly connected with the motor shaft, and the axial flow fan is rotatably connected with the motor shaft.

[0020] The air conditioner indoor unit has the following advantages or beneficial effects: the centrifugal fan is driven to rotate by the motor, the axial flow fan is rotatably connected with the motor shaft, and the axial flow fan is rotated under the action of the airflow stirred by the rotation of the centrifugal fan, so that the airflow is gathered to the centrifugal fan, which is equivalent to passive rotation, and the running noise is small, thereby further improving the noise reduction effect.

[0021] In some embodiments of the present application, the motor is a double-shaft motor, and the motor shafts are arranged at the two ends of the motor in the axial direction; the number of the centrifugal fans is multiple, and a part of the centrifugal fans are arranged on one of the motor shafts, and the rest of the centrifugal fans are arranged on the other motor shaft; one axial flow fan is arranged on the free end of each of the two motor shafts.

[0022] The air conditioner indoor unit has the following advantages or beneficial effects: for the indoor unit with multiple centrifugal fans, the overall axial size is large after combined installation, so the multiple centrifugal fans are simultaneously driven by the double-shaft motor, and the fan rotation stability is high; and one axial fan is arranged at the free end of each motor shaft, that is, at both ends of the centrifugal fan axis, so that the airflow at both ends is gathered to the centrifugal fan between the two axial fans, further increasing the air supply volume and improving the air supply efficiency and heat exchange effect.

[0023] In some embodiments of the present application, the centrifugal fan and the axial fan are both arranged on the motor shaft of the motor, the centrifugal fan is fixedly connected with the motor shaft, and the axial fan is fixedly connected with the motor shaft.

[0024] The air conditioner indoor unit has the following advantages or beneficial effects: the centrifugal fan and the axial fan are both fixedly connected with the motor shaft, so that the centrifugal fan and the axial fan are synchronously driven to rotate when the motor works, the operation is stable and reliable, the rotation speed of the axial fan is not affected by the centrifugal fan, and the air supply effect of the centrifugal fan is reliable.

[0025] In some embodiments of the present application, the motor is a double-shaft motor, the motor shafts are arranged at the axial two ends of the motor respectively, the number of the centrifugal fans is multiple, a part of the centrifugal fans are arranged on one of the motor shafts, and the rest of the centrifugal fans are arranged on the other motor shaft; one axial fan is arranged on the free end of each of the two motor shafts.

[0026] The air conditioner indoor unit has the following advantages or beneficial effects: for the indoor unit with multiple centrifugal fans, the overall axial size is large after combined installation, so the multiple centrifugal fans are simultaneously driven by the double-shaft motor, and the fan rotation stability is high; and one axial fan is arranged at the free end of each motor shaft, that is, at both ends of the centrifugal fan axis, so that the airflow at both ends is gathered to the centrifugal fan between the two axial fans, further increasing the air supply volume and improving the air supply efficiency and heat exchange effect.

[0027] In some embodiments of the present application, the air conditioner indoor unit further comprises:

[0028] The electric control box is arranged in the cabinet and located at the air suction side of the axial fan;

[0029] The electric control box comprises an outer box body and an inner baffle, the outer box body comprises a top plate, a bottom plate and a circumferential side plate, the circumferential side plate comprises a first side plate facing the axial fan, and a heat dissipation airflow outlet is formed in the first side plate; the inner baffle is arranged in the outer box body and opposite to the heat dissipation airflow outlet, and the electrical components in the electric control box are arranged on the side of the inner baffle away from the heat dissipation airflow outlet.

[0030] The air conditioner indoor unit has the following advantages or beneficial effects: the electric control box is arranged at the suction side of the axial flow fan, the first side plate of the electric control box is formed with a heat dissipation airflow outlet facing the axial flow fan, and when the axial flow fan rotates, the heat inside the electric control box can be taken away through the heat dissipation airflow outlet of the electric control box, and the heat dissipation of the electric control box is enhanced; the electric control box comprises an outer box body and an inner baffle, the electrical components in the electric control box are arranged on the side of the inner baffle away from the heat dissipation airflow outlet, and the outer box body and the inner baffle can adopt a metal plate structure, so that the electric control box forms a double-layer metal plate structure, and the waterproof and dustproof effects of the electric control box are improved, and the use safety and reliability of the internal electrical components are improved.

[0031] In some embodiments of the present application, the inner baffle is arranged parallel to the first side plate, and a distance is formed between the top edge of the inner baffle and the lower surface of the top plate of the outer box body to form an airflow flow gap, and a distance is formed between the bottom edge of the inner baffle and the upper surface of the bottom plate of the outer box body to form an airflow flow gap.

[0032] The air conditioner indoor unit has the following advantages or beneficial effects: the inner baffle of the electric control box is formed with an airflow flow gap between the top edge and the lower surface of the top plate of the outer box body, and an airflow flow gap is formed between the bottom edge and the upper surface of the bottom plate of the outer box body, so as to minimize the obstruction of the double-layer structure to the airflow inside the electric control box, ensure smooth airflow, and improve the heat dissipation effect.

[0033] In some embodiments of the present application, a distance is formed between the inner baffle and the first side plate.

[0034] The air conditioner indoor unit has the following advantages or beneficial effects: since the inner baffle is arranged inside the outer box body, a distance is formed between the inner baffle and the first side plate of the outer box body, so that the electrical components on the inner baffle are spaced apart from the heat dissipation airflow outlet on the outer box body, which is beneficial to improve the waterproof and dustproof effects.

[0035] In some embodiments of the present application, the circumferential side plate comprises a second side plate facing the air inlet, and the second side plate is formed with a heat dissipation airflow inlet.

[0036] The air conditioner indoor unit has the following advantages or beneficial effects: the outer box body of the electric control box is provided with a heat dissipation airflow inlet in addition to the heat dissipation airflow outlet, and the heat dissipation airflow inlet faces the air inlet of the indoor unit, so that when the centrifugal fan and the axial flow fan work, the heat dissipation airflow outlet and the heat dissipation airflow inlet jointly act to make the airflow flow through the electric control box smoothly, strengthen the heat exchange of the electric control box, and further improve the heat dissipation effect of the electric control box.

[0037] In some embodiments of the present application, an air conditioner is also provided, comprising the above-mentioned air conditioner indoor unit.

[0038] The air conditioner has the advantages or beneficial effects that: by arranging the air conditioner indoor unit, the air supply amount and air supply distance can be increased, the performance of the air conditioner is improved, the volume of the indoor unit is slightly affected, the production cost of the air conditioner is reduced, and the market competitiveness is improved.

[0039] Other features and advantages of the present application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0041] Figure 1 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0042] Figure 2 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0043] Figure 3 For Figure 2 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0044] Figure 4 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0045] Figure 5 For Figure 4 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0046] Figure 6 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0047] Figure 7 For Figure 6 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0048] Figure 8 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0049] Figure 9 Exemplarily shows a perspective view of the air inlet side of the air conditioner indoor unit according to some embodiments;

[0050] Figure 10 For Figure 9C toward the front view of

[0051] Figure 11 is Figure 10 D-D cross-sectional view of

[0052] Reference signs:

[0053] 100, indoor unit;

[0054] 110, housing; 111, air inlet; 112, air outlet;

[0055] 120, duct member; 121, first portion; 122, second portion; 123, air inlet portion; 124, air outlet portion; 125, motor mounting portion; 126, skeleton portion; 127, sawtooth portion;

[0056] 130, centrifugal fan;

[0057] 140, motor; 141, motor shaft;

[0058] 150, axial fan;

[0059] 160, control box; 161, outer box body; 162, inner baffle; 163, first side plate; 164, heat dissipation air outlet; 165, electrical device; 166, air flow flow gap; 167, second side plate; 168, heat dissipation air inlet. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0061] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present application.

[0062] The terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or an ordering between or among the indicated technical features. Thus, a feature defined with "first", "second", etc. can include one or more of the features implicitly or explicitly.

[0063] In the description of the present application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0065] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0066] In the present application, the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and refrigeration or heating of indoor space.

[0067] The low-temperature and low-pressure refrigerant enters the compressor, which compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0068] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant formed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with the material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0069] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0070] The indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[0071] Reference Figures 1 to 9 In some embodiments of the present application, an air conditioner is proposed, which includes an air conditioner indoor unit 100.

[0072] In some embodiments of the present application, the air conditioner is a ceiling-mounted air conditioner, and the indoor unit 100 is a ceiling-mounted air conditioner indoor unit, which includes a casing 110, a heat exchanger, an air duct component 120, a centrifugal fan 130, a motor 140, and an axial fan 150.

[0073] The casing 110 of the indoor unit 100 defines the external outline of the indoor unit 100, and in some embodiments of the present application, the casing 110 has a cuboid shape, including a top plate, a bottom plate, and a circumferential side plate composed of a front panel, a rear panel, a left side plate, and a right side plate. The circumferential side plate is provided with an air inlet 111 and an air outlet 112, and the air inlet 111 can be provided with an air inlet grille (not shown), and the air outlet 112 can also be provided with an air outlet grille (not shown).

[0074] The heat exchanger (not shown) is arranged in the casing 110, i.e., in the internal space of the indoor unit 100, and is located between the air inlet 111 and the air outlet 112, for heat exchange with the air flow entering the casing 110 from the air inlet 111 and flowing out through the air outlet 112, to adjust the temperature of the indoor air. The heat exchanger can have a one-stage, two-stage, or three-stage structure, and its specific structure is the same as that of the related art, which will not be described here.

[0075] The air duct component 120 is located inside the housing 110. The air duct component 120 defines an air duct that connects the air inlet 111 and the air outlet 112, thus defining the airflow path within the housing 110.

[0076] Centrifugal fan 130 is located in the air duct. It is the main fan of the indoor unit 100 of the air conditioner in some embodiments of this application. It is used to drive air from the air inlet 111 into the casing 110, and after heat exchange by the heat exchanger, it flows out from the air outlet 112.

[0077] The motor 140 is located inside the housing 110 and is used to drive the centrifugal fan 130 to rotate.

[0078] An axial fan 150 is housed inside the housing 110. The axial fan 150 is configured to be coaxial with the centrifugal fan 130 and drives air to be discharged to the centrifugal fan 130 when it rotates.

[0079] In some embodiments of this application, the indoor unit 100 of the air conditioner adopts a combination design of a centrifugal fan 130 and an axial fan 150. The axial fan 150 is configured such that when it rotates, it drives the air it draws in to be discharged towards the centrifugal fan 130, that is, the centrifugal fan 130 is located on the exhaust side of the axial fan 150. When the axial fan 150 rotates, it discharges and gathers the airflow near it towards the centrifugal fan 130, which has a supplementary airflow effect on the centrifugal fan 130. This helps to increase the air volume and air delivery distance of the centrifugal fan 130, improve the air delivery efficiency, and thus improve the performance of the air conditioner. Compared with the centrifugal fan 130, the axial fan 150 has a simpler structure, smaller size, occupies less space, and has a larger air volume. Compared with the related technology of increasing the number or size of the centrifugal fan 130 to increase the air volume, the axial fan 150 has little impact on the volume of the indoor unit 100 and will not increase the volume of the indoor unit 100 excessively.

[0080] like Figure 6 As shown, in some embodiments of this application, both the centrifugal fan 130 and the axial fan 150 are mounted on the motor shaft 141 of the motor 140. The centrifugal fan 130 is fixedly connected to the motor shaft 141, and the axial fan 150 is rotatably connected to the motor shaft 141.

[0081] The centrifugal fan 130 is directly driven to rotate by the motor 140, while the axial fan 150 rotates under the action of the airflow stirred by the centrifugal fan 130, which is equivalent to passive rotation, resulting in low operating noise and further improving the noise reduction effect.

[0082] Specifically, the axial fan 150 can be rotated relative to the motor shaft 141 by setting a bushing or bearing between the axial fan 150 and the motor shaft 141. The fixed connection between the centrifugal fan 130 and the motor shaft 141 can be the same as existing related technologies, such as key connection or interference fit, which will not be described in detail here.

[0083] In some embodiments of this application, both the centrifugal fan 130 and the axial fan 150 are mounted on the motor shaft 141 of the motor 140. The centrifugal fan 130 is fixedly connected to the motor shaft 141, and the axial fan 150 is also fixedly connected to the motor shaft 141. That is, since both the centrifugal fan 130 and the axial fan 150 are fixedly connected to the motor shaft 141, when the motor 140 is working, it synchronously drives the centrifugal fan 130 and the axial fan 150 to rotate, resulting in stable and reliable operation. The speed of the axial fan 150 is not affected by the centrifugal fan 130, and the air supply effect to the centrifugal fan 130 is reliable.

[0084] In some embodiments of this application, for some air conditioners that require a large air volume, the indoor unit 100 is equipped with multiple centrifugal fans 130. The multiple centrifugal fans 130 are coaxially arranged and can be driven by the same motor or by multiple motors respectively.

[0085] For this type of indoor unit 100 with multiple centrifugal fans 130, since its overall axial dimension is large after assembly, in order to minimize space occupation and ensure structural strength and reduce deformation, in some embodiments of this application, the motor 140 is a dual-shaft motor, with a motor shaft 141 at each of the two axial ends of the dual-shaft motor; among the multiple centrifugal fans 130, some of the centrifugal fans 130 are located on one of the motor shafts 141, and the remaining centrifugal fans 130 are located on the other motor shaft 141; an axial flow fan 150 is provided on the free end of each of the two motor shafts 141.

[0086] like Figure 6 and Figure 7 As shown, taking three centrifugal fans 130 as an example, two centrifugal fans 130 are spaced apart on the left end motor shaft 141 of the motor 140, and the third centrifugal fan 130 is located on the right end motor shaft 141 of the motor 140. There are two axial flow fans 150, one of which is located on the free end of the left end motor shaft 141, and the other is located on the free end of the right end motor shaft 141.

[0087] Of course, the number of centrifugal fans 130 is not limited to the three mentioned above, and there is no specific limit to their number.

[0088] The multiple centrifugal fans 130 are simultaneously driven by the double-shaft motor 140, the fan rotation stability is high, and the axial flow fans 150 are arranged at the free ends of the two motor shafts 141, i.e. at both ends of the axis of the centrifugal fan 130, so that the air flows at both ends are gathered to the centrifugal fan 130 between the two axial flow fans 150, further increasing the air supply volume and improving the air supply efficiency and heat exchange effect.

[0089] In some embodiments of the present application, the axial flow fans 150 at both ends are of the same structure, model and parameters, and are symmetrically arranged, to facilitate assembly.

[0090] For the air duct component 120, as shown in Figure 8 , while combining Figure 4 , for easy installation, it is a split structure, including a first part 121 and a second part 122 connected in opposition, the two parts together enclose air ducts corresponding to each centrifugal fan 130, and each centrifugal fan 130 is correspondingly accommodated in each air duct. Each air duct has an air inlet portion 123 and an air outlet portion 124 respectively communicating with the internal space of the air duct, the air inlet portion 123 is located at both ends of the corresponding centrifugal fan 130, and each air inlet portion 123 respectively communicates with the air inlet 111 of the indoor unit 100, and the air outlet portion 124 respectively communicates with the air outlet 112 of the indoor unit 100.

[0091] In some embodiments of the present application, as shown in Figure 5 , the air outlet portion 124 of the air duct is formed with a sawtooth portion 127 located above the centrifugal fan 130, which can divide the air outlet into small air flows to further reduce noise.

[0092] In some embodiments of the present application, the air duct component 120 is formed with a motor mounting portion 125, and the motor 140 is supported and mounted on the motor mounting portion 125.

[0093] As shown in the view angle Figure 8 , the air duct component 120 is an injection molding structure, the first part 121 and the second part 122 are connected in opposition, the first part 121 is on the top, the second part 122 is on the bottom, the motor mounting portion 125 is formed on the second part 122, the second part 122 extends to the side where the air outlet 112 of the indoor unit 100 is located to form a skeleton portion 126, and the second part 122 and the skeleton portion 126 are fixedly connected with the housing 110 of the indoor unit 100 as a whole, so as to fix the air duct component 120 in the housing 110 of the indoor unit 100.

[0094] The first part 121 and the second part 122 are provided with a plurality of buckle structures and screw connection structures matched with each other, and are connected as a whole in the connected state through the buckle structures and the screw connection structures, to facilitate installation and disassembly.

[0095] Referring toFigure 10 and Figure 11 while combining Figure 3 In some embodiments of the present application, the air conditioner indoor unit 100 further comprises an electric control box 160, which is arranged in the casing 110 and located at the suction side of the axial flow fan 150.

[0096] Some electrical components 165 required for the operation of the air conditioner, such as fan drive power modules and power modules, are installed in the electric control box 160.

[0097] The electric control box 160 comprises an outer box body 161 and an inner baffle 162. The outer box body 161 comprises a top plate, a bottom plate and a circumferential side plate, which comprises a first side plate 163 facing the axial flow fan 150. The first side plate 163 is formed with a heat dissipation airflow outlet 164, which communicates with the internal space of the electric control box 160. The inner baffle 162 is arranged in the outer box body 161 and is arranged opposite to the heat dissipation airflow outlet 164. The electrical components 165 in the electric control box 160 are arranged on the inner baffle 162 and located on the side of the inner baffle 162 away from the heat dissipation airflow outlet 164.

[0098] When the axial flow fan 150 rotates, the heat generated by the electrical components 165 in the electric control box 160 can be taken away through the heat dissipation airflow outlet 164 of the electric control box 160, thereby enhancing the heat dissipation of the electric control box 160. The electric control box 160 comprises an outer box body 161 and an inner baffle 162. The electrical components 165 in the electric control box 160 are arranged on the inner baffle 162 and located on the side of the inner baffle 162 away from the heat dissipation airflow outlet 164. The outer box body 161 and the inner baffle 162 can adopt a metal structure, so that the electric control box 160 forms a double-layer metal structure, and the waterproof and dustproof effects of the electric control box 160 are improved, thereby improving the safety and reliability of the internal electrical components 165.

[0099] In some embodiments of the present application, as shown in Figure 11 The top edge of the inner baffle 162 is spaced apart from the lower surface of the top plate of the outer box body 161 by a certain distance to form an airflow flow gap 166. The bottom edge of the inner baffle 162 is spaced apart from the upper surface of the bottom plate of the outer box body 161 by a certain distance to form an airflow flow gap 166. When the axial flow fan 150 operates, the heat inside the electric control box 160 is driven to flow out through the airflow flow gap and the heat dissipation airflow outlet 164, thereby minimizing the obstruction of the double-layer structure to the airflow inside the electric control box 160, ensuring smooth airflow and improving the heat dissipation effect.

[0100] In some embodiments of the present application, as shown in Figure 11As shown, the inner baffle 162 is located inside the outer box body 161 and is spaced apart from the first side plate 163, so that the electrical device 165 on the inner baffle 162 is spaced apart from the heat dissipation air outlet 164 on the outer box body 161, which is beneficial to improve the waterproof and dustproof effect.

[0101] In some embodiments of the present application, as shown in Figure 3 and Figure 10 As shown, the circumferential side plate of the outer box body 161 further comprises a second side plate 167 arranged towards the air inlet 111, and the second side plate 167 is formed with a heat dissipation air inlet 168, which communicates with the internal space of the electric control box 160.

[0102] The heat dissipation air inlet 168 is directed towards the air inlet 111 of the indoor unit 100, so that part of the air introduced into the casing 110 from the air inlet 111 of the indoor unit 100 can enter the electric control box 160 through the heat dissipation air inlet 168. When the centrifugal fan 130 and the axial flow fan 150 are working, the heat dissipation air outlet 164 and the heat dissipation air inlet 168 jointly act to make the air flow smoothly through the electric control box 160, thereby strengthening the heat exchange of the electric control box 160 and further improving the heat dissipation effect of the electric control box 160.

[0103] In some embodiments of the present application, as shown in Figure 3 The electric control box 160 is located at one end of the indoor unit 100, and the heat dissipation air inlet 168 thereof is arranged flush with the air inlet 111 of the indoor unit 100. The heat dissipation air outlet 164 and the heat dissipation air inlet 168 are both arranged in a grid shape to ensure the waterproof and dustproof effect.

[0104] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0105] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements easily thought of by those skilled in the art within the technical range disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The casing has an air inlet and an air outlet. A heat exchanger is disposed inside the housing and located between the air inlet and the air outlet; An air duct component is disposed within the housing, the air duct component defines an air outlet, and the air duct connects the air inlet and the air outlet; A centrifugal fan, located within the air duct, drives air to enter the casing from the air inlet, and after heat exchange by the heat exchanger, flows out from the air outlet. An electric motor, located inside the housing, is used to drive the centrifugal fan to rotate; An axial fan is disposed within the housing, the axial fan being configured to be coaxial with the centrifugal fan, and driving the air drawn in by the axial fan to be discharged towards the centrifugal fan when rotating.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, Both the centrifugal fan and the axial fan are mounted on the motor shaft of the motor. The centrifugal fan is fixedly connected to the motor shaft, and the axial fan is rotatably connected to the motor shaft.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The motor is a dual-shaft motor, with motor shafts at both ends of its axial direction; there are multiple centrifugal fans, some of which are located on one of the motor shafts and the rest on the other motor shaft; an axial flow fan is provided on the free end of each of the two motor shafts.

4. The indoor unit of the air conditioner according to claim 1, characterized in that, Both the centrifugal fan and the axial fan are mounted on the motor shaft of the motor. The centrifugal fan and the axial fan are fixedly connected to the motor shaft.

5. The indoor unit of the air conditioner according to claim 4, characterized in that, The motor is a dual-shaft motor, with motor shafts at both ends of its axial direction; there are multiple centrifugal fans, some of which are located on one of the motor shafts and the rest on the other motor shaft; an axial flow fan is provided on the free end of each of the two motor shafts.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, Also includes: An electrical control box is located inside the housing and on the suction side of the axial fan; The electrical control box includes an outer box and an inner baffle. The outer box includes a top plate, a bottom plate, and circumferential side plates. The circumferential side plates include a first side plate facing the axial fan, and a heat dissipation airflow outlet is formed on the first side plate. The inner baffle is disposed inside the outer box and is disposed opposite to the heat dissipation airflow outlet. The electrical components inside the electrical control box are disposed on the side of the inner baffle that is opposite to the heat dissipation airflow outlet.

7. The indoor unit of the air conditioner according to claim 6, characterized in that, The inner baffle is arranged parallel to the first side plate. The top edge of the inner baffle is spaced a certain distance from the lower surface of the top plate of the outer box to form an airflow gap. The bottom edge of the inner baffle is spaced a certain distance from the upper surface of the bottom plate of the outer box to form an airflow gap.

8. The indoor unit of the air conditioner according to claim 6, characterized in that, The inner baffle is spaced a certain distance from the first side plate.

9. The indoor unit of the air conditioner according to claim 6, characterized in that, The circumferential side plate includes a second side plate facing the air inlet, and a heat dissipation airflow inlet is formed on the second side plate.

10. An air conditioner, characterized in that, The indoor unit of the air conditioner includes any one of claims 1 to 9.

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