Indoor unit of air conditioner

Abstract

The invention discloses an air conditioner indoor unit which comprises a machine shell, an air inlet, an air outlet, a heat exchanger and a heat exchanger. The draught fan assembly is arranged in the machine shell; the indoor heat exchanger is arranged in the machine shell; the photocatalytic assembly is arranged in the machine shell; the photocatalysis assembly comprises a light source used for emitting ultraviolet light and infrared light; the filter screen is in an arc shape, the light source is located in the concave surface of the filter screen, a first curved surface and a second curved surface are formed on the filter screen, the first curved surface is the concave surface of the filter screen, and the second curved surface is the convex surface of the filter screen. Wherein the infrared light and the second curved surface generate photo-thermal reaction, so that the sterilization of the surface of the second curved surface is realized, the efficiency of catalytic reaction generated by the ultraviolet light and the first curved surface can be improved, the defect of short propagation distance of the ultraviolet light is made up, and the catalytic effect is enhanced.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an indoor unit of an air conditioner. Background Technology

[0002] The indoor unit of an air conditioner can quickly regulate indoor temperature and provide a comfortable living environment. It includes a fan assembly and an indoor heat exchanger. The indoor heat exchanger exchanges heat with the air drawn in by the fan assembly, and then the fan assembly outputs conditioned air into the room to regulate the indoor temperature. To maintain a clean air environment, the indoor unit is equipped with a photocatalytic component at the air inlet. The air entering the indoor unit is sterilized and purified by the photocatalytic component before continuing to circulate within the indoor air duct, thus achieving indoor air conditioning.

[0003] In a photocatalytic component, a light source shines on a filter screen, which is loaded with catalytically active materials. Once activated by the light source, these materials catalyze the air purification process.

[0004] In related technologies, photocatalytic components employ a linear combination of multiple LED beads and a shielding element. The energy of the light source is superimposed, increasing the irradiation area and localized irradiation power, while any leaked light is absorbed by the shielding element. While these photocatalytic components improve purification capabilities to some extent, the increased number of LED beads inherently results in low energy utilization per individual bead and also adds wind resistance, impacting the air conditioning's airflow / heat exchange efficiency and purification effect. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an indoor unit for an air conditioner in which infrared light generates a photothermal reaction with a second curved surface, improving the efficiency of the catalytic reaction generated by ultraviolet light with a first curved surface, compensating for the short propagation distance of ultraviolet light, enhancing the catalytic effect, and improving the energy utilization rate of the light source.

[0006] An indoor unit of an air conditioner according to a first aspect of the present invention includes: a housing having an air inlet and an air outlet spaced apart from each other; a fan assembly disposed within the housing; an indoor heat exchanger disposed within the housing for exchanging heat with indoor air entering the housing; and a photocatalytic component disposed within the housing. The photocatalytic component includes: a light source for emitting ultraviolet light and infrared light; and a filter screen, the filter screen being arc-shaped, the light source being located within the concave surface of the filter screen, the filter screen having a first curved surface and a second curved surface, the first curved surface being the concave surface of the filter screen, and the second curved surface being the convex surface of the filter screen; wherein, when ultraviolet light irradiates the first curved surface, the ultraviolet light can undergo a catalytic reaction with the first curved surface; and when infrared light irradiates the second curved surface, the infrared light can undergo a photothermal reaction with the second curved surface.

[0007] According to the first aspect of the present invention, the indoor unit of the air conditioner generates a photothermal reaction with the second curved surface, which not only achieves sterilization of the surface of the second curved surface, but also improves the efficiency of the catalytic reaction generated by the ultraviolet light and the first curved surface, making up for the short propagation distance of ultraviolet light and enhancing the catalytic effect.

[0008] According to some embodiments of the present invention, the light source includes: a first lamp bead disposed on the side of the first curved surface opposite to the second curved surface, the first lamp bead being used to emit ultraviolet light; and a second lamp bead disposed at a distance from the first lamp bead along a first direction, the second lamp bead being used to emit infrared light.

[0009] According to some embodiments of the present invention, there are multiple first LEDs, which are spaced apart along a first direction; and there are multiple second LEDs, which are spaced apart along a first direction.

[0010] According to some embodiments of the present invention, a first medium is coated on the first curved surface, and the ultraviolet light can react with the first medium to undergo a catalytic reaction; and a second medium is coated on the second curved surface, and the infrared light can react with the second medium to undergo a photothermal reaction.

[0011] According to some embodiments of the present invention, the porosity of the filter screen is A, and A satisfies the relationship: 40%≤A≤95%.

[0012] According to some embodiments of the present invention, the photocatalytic component further includes: a support frame, the support frame including: a base, the base being fixed to the air inlet, the light source being disposed on the base; a frame, one end of the frame being fixed to the base and the other end being detachably fixed to the base, a clamping space being formed between the frame and the base, and the filter being disposed in the clamping space.

[0013] According to some embodiments of the present invention, the photocatalytic component is disposed at the air inlet and / or the air outlet.

[0014] An indoor unit of an air conditioner according to a second aspect of the present invention includes: a housing having an air inlet and an air outlet spaced apart from each other; a fan assembly disposed within the housing; an indoor heat exchanger disposed within the housing for exchanging heat with indoor air entering the housing; and a photocatalytic component disposed within the housing. The photocatalytic component includes: a light source for emitting ultraviolet and infrared light; a filter screen, the filter screen being arc-shaped, the light source being located within the concave surface of the filter screen, the filter screen having a first curved surface and a second curved surface, the first curved surface being the concave surface of the filter screen, and the second curved surface being the convex surface of the filter screen; the filter screen having a first curved surface and a second curved surface, the second curved surface being disposed on the side of the first curved surface opposite to the light source, the first curved surface and the second curved surface being coated with a first medium and a second medium, respectively; wherein the curvatures of the first curved surface and the second curved surface are different.

[0015] According to the second aspect of the present invention, the indoor unit of the air conditioner has different curvatures of the first curved surface and the second curved surface, and the thickness of the filter is positively correlated with the intensity of infrared light, so as to ensure that the infrared light fully reacts with the second medium and makes full use of the energy of the infrared light.

[0016] According to some embodiments of the present invention, the curvature of the second surface is greater than the curvature of the first surface.

[0017] According to some embodiments of the present invention, the cross-section of the second curved surface along the first direction is an elliptical arc centered on the light source.

[0018] According to some embodiments of the present invention, let the eccentricity of the elliptical arc be B, and B satisfy the relationship: 0.1≤B≤0.8.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of an indoor unit of an air conditioner according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of an indoor unit of an air conditioner according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of an indoor unit of an air conditioner according to an embodiment of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the structure of a photocatalytic component according to an embodiment of the present invention; Figure 5 The explosion of the photocatalytic component according to an embodiment of the present invention Figure 1 ; Figure 6 The explosion of the photocatalytic component according to an embodiment of the present invention Figure 2 ; Figure 7 The explosion of the photocatalytic component according to an embodiment of the present invention Figure 3 ; Figure 8 This is a schematic diagram of the support frame according to an embodiment of the present invention; Figure 9 This is an exploded view of the support frame according to an embodiment of the present invention; Figure 10 yes Figure 9 Partial schematic diagram A; Figure 11 This is a cross-sectional view of a photocatalytic component according to an embodiment of the present invention.

[0021] Figure label: 100. Indoor unit of air conditioner; 10. Casing; 11. Air inlet; 12. Air outlet; 13. Indoor heat exchanger; 20. Photocatalytic component; 21. Filter; 211. First curved surface; 212. Second curved surface; 22. Light source; 221. First LED bead; 222. Second LED bead; 23. Support frame; 231. Base; 2311. Mounting plate; 2312. Light shield; 2313. Support plate; 2314. Support rod; 2315. Slide groove; 232. Frame. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0023] The following is for reference. Figures 1-11 An indoor unit 100 of an air conditioner according to an embodiment of the present invention is described.

[0024] Reference Figures 1-11 As shown, the indoor unit 100 of the air conditioner in this embodiment of the invention includes: a casing 10, a fan assembly, an indoor heat exchanger 13, and a photocatalytic assembly 20.

[0025] The first direction is the length direction of the photocatalytic component 20, and the length direction of the photocatalytic component 20 is consistent with the length direction of the air conditioner's interior.

[0026] Figures 1-11The length direction is the length direction of the photocatalytic component 20, and the height direction is the height direction of the photocatalytic component 20.

[0027] The casing 10 is used to protect the internal components, prevent the external environment from damaging the internal components, and provide support and protection for the internal components, ensuring that the components are installed in the designed position, maintaining the structural stability and operating efficiency of the air conditioner indoor unit 100, and extending the service life of the air conditioner.

[0028] like Figures 1-3 As shown, the casing 10 is provided with air inlets 11 and air outlets 12 spaced apart from each other. Indoor air enters the casing 10 through the air inlet 11, and after heat exchange by the indoor heat exchanger 13, it forms a heat exchange airflow, which enters the room through the air outlet 12, maintaining good airflow.

[0029] The fan assembly is located inside the housing 10. The fan assembly is configured to introduce airflow from outside the housing 10 into the housing 10 and output airflow from inside the housing 10 to the outside. The fan assembly provides power for the flow of indoor air and can maintain air circulation in the cabinet air conditioner.

[0030] The indoor heat exchanger 13 is installed inside the casing 10. The indoor heat exchanger 13 is responsible for exchanging heat between the refrigerant and the air introduced into the casing 10 by the fan assembly. After heat exchange, the air is then output to the outside by the fan assembly, thereby regulating the indoor temperature.

[0031] When the air conditioner is running, the compressor compresses the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure gas. After being condensed and cooled by the outdoor condenser, it becomes a high-pressure liquid and then enters the indoor heat exchanger 13 through the expansion valve. At this time, the indoor heat exchanger 13 can be an evaporator. The refrigerant absorbs heat from the indoor air in the indoor heat exchanger 13 and evaporates from a liquid state to a gaseous state, thus realizing the cooling process.

[0032] In heating mode, the indoor heat exchanger 13 acts as a condenser, where the refrigerant condenses from a gaseous state to a liquid state, releasing heat to the indoor air to achieve a heating effect.

[0033] The indoor heat exchanger 13 may include heat exchange tubes through which the refrigerant flows and undergoes a phase change, i.e., from liquid to gas or from gas to liquid. The heat exchange tubes are typically made of copper, which has good thermal conductivity and can efficiently transfer heat between the refrigerant and the air. The piping is usually designed in a U-shape or serpentine shape to increase the refrigerant flow path and thus increase the contact time with the air.

[0034] The indoor heat exchanger 13 may include heat exchange fins, which are typically made of aluminum to increase the heat exchange area and improve heat exchange efficiency. The heat exchange fins are closely arranged around the heat exchange tubes, and when indoor air flows over the heat exchange fins, the heat in the air exchanges with the fins.

[0035] The indoor heat exchanger 13 may include a water collection tray. When the air conditioner is cooling, the surface of the indoor heat exchanger 13 is at a low temperature, and the moisture in the air will condense on the heat exchange fins to form condensate. The condensate is collected through the water collection tray below the indoor heat exchanger 13 and then discharged through the drain pipe to prevent water droplets from entering the room.

[0036] In some embodiments, the photocatalytic component 20 can be disposed at the air inlet 11. The photocatalytic component 20 can be disposed separately at the air inlet 11 to sterilize the airflow entering the housing 10.

[0037] Reference Figure 2 and Figure 3 As shown, the photocatalytic component 20 can be installed at the air inlet 11 and the air outlet 12. That is, it can also be installed separately at the air outlet 12 to sterilize the airflow discharged from the air outlet 12.

[0038] In some other embodiments, photocatalytic components 20 may be provided at both the air inlet 11 and the air outlet 12 to sterilize the airflow entering the housing 10 from the air inlet 11 and the airflow exiting from the air outlet 12.

[0039] Combination Figure 2 and Figure 3 As shown, the photocatalytic component 20 is installed inside the housing 10. When indoor air enters the housing 10 and flows through the photocatalytic component 20, the photocatalytic component 20 can sterilize and purify the airflow at the air inlet 11 and / or the air outlet 12, thereby improving the quality of the air outlet 12.

[0040] according to Figure 4 and Figure 5 As shown, the photocatalytic component 20 includes a light source 22 for emitting ultraviolet and infrared light. Specifically, ultraviolet light has a relatively short propagation distance, while infrared light has a relatively long propagation distance. Ultraviolet light can react with the photocatalyst to produce oxides, while infrared light can react with metal oxides or carbon materials to produce a photothermal reaction, thereby rapidly heating the material surface for surface sterilization.

[0041] Furthermore, the photocatalytic component 20 includes: a filter 21, which is arc-shaped, with the light source located within the concave surface of the filter 21. The filter 21 has a first curved surface 211 and a second curved surface 212 formed thereon. The first curved surface 211 is the concave surface of the filter 21, and the second curved surface 212 is the convex surface of the filter 21. In other words, the filter 21 has an arc-shaped structure, and the first curved surface 211 and the second curved surface 212 are two opposing surfaces. The first curved surface 211 is concave, and the second curved surface 212 is convex. The second curved surface 212 is located on the side of the first curved surface 211 facing away from the light source 22, while the first curved surface 211 is located on the side of the filter 21 facing the light source 22. The first curved surface 211 is coated with a catalytic material, allowing it to react with ultraviolet light to produce a catalytic reaction, and the second curved surface 212 to react with infrared light to produce a photothermal reaction.

[0042] The light source 22 is located at the center of the first curved surface 211 and the second curved surface 212, ensuring that the light emitted by the light source 22 can evenly cover the first curved surface 211 and the second curved surface 212, ensuring that the first curved surface 211 fully reacts with ultraviolet light and the second curved surface 212 fully reacts with infrared light.

[0043] When ultraviolet light irradiates the first curved surface 211, it can undergo a catalytic reaction with the surface. Specifically, after ultraviolet light irradiates the filter 21, it first irradiates the first curved surface 211. The ultraviolet light passes through the first curved surface 211 and enters the filter 21, where it rapidly attenuates. Therefore, the ultraviolet energy received by the second curved surface 212 is low, and there is no ultraviolet light leakage. When ultraviolet light irradiates the first curved surface 211, it can undergo a catalytic reaction with the surface. The first curved surface 211 can be coated with a catalytic material, and the catalytic medium located on the first curved surface 211 can be activated by ultraviolet light. That is, the ultraviolet light can undergo a catalytic reaction with the catalytic medium to produce active oxides, which are used for air sterilization and oxidation of indoor gaseous pollutants such as formaldehyde, benzene compounds, and other organic molecules.

[0044] When infrared light irradiates the second curved surface 212, the infrared light can undergo a photothermal reaction with the second curved surface 212. Specifically, the catalytic material on the first curved surface 211 cannot absorb infrared light, so the loss of infrared light propagating to the second curved surface 212 is low; while the second curved surface 212, in contact with infrared light, can generate a photothermal effect, causing the surface of the second curved surface 212 to heat up rapidly for surface sterilization, while improving the catalytic reaction efficiency of the catalytic medium with ultraviolet light, enhancing catalytic performance, and improving the stability of the catalytic material.

[0045] Therefore, the infrared light reacts with the second curved surface in a photothermal reaction, which not only sterilizes the surface of the second curved surface 212, but also improves the efficiency of the catalytic reaction between the ultraviolet light and the first curved surface, makes up for the short propagation distance of the ultraviolet light, enhances the catalytic effect, and improves the energy utilization rate of the light source 22.

[0046] Furthermore, a first medium is coated on the first curved surface 211. When ultraviolet light irradiates the first curved surface 211, the ultraviolet light can undergo a catalytic reaction with the first medium. Specifically, after the ultraviolet light irradiates the filter 21, it first irradiates the first curved surface 211. The ultraviolet light passes through the first curved surface 211 and enters the filter 21, where it rapidly attenuates. Therefore, the ultraviolet energy received on the second curved surface 212 is low, and there is no ultraviolet light leakage. When ultraviolet light irradiates the first curved surface 211, the first medium located on the first curved surface 211 can be activated by the ultraviolet light. That is, the ultraviolet light can undergo a catalytic reaction with the first medium to produce active oxides, which are used for air sterilization and oxidation of indoor gaseous pollutants such as formaldehyde, benzene compounds, and other organic molecules.

[0047] Ultraviolet light irradiates the first medium to produce a photocatalytic reaction, effectively decomposing harmful substances in the air, such as bacteria, viruses, and volatile organic compounds, thereby improving air quality, achieving air purification and deodorization, and enhancing the comfort and health benefits of air conditioning.

[0048] The first medium can be a semiconductor material. The semiconductor material can be a wide-bandgap semiconductor such as titanium dioxide or zinc oxide. This semiconductor material can undergo a catalytic reaction with ultraviolet light to produce active oxides, such as hydroxyl radicals, which can be used for air sterilization and the oxidation of indoor gaseous pollutants such as formaldehyde and benzene compounds.

[0049] Furthermore, a second medium is coated on the second curved surface 212. When infrared light irradiates the second curved surface 212, the infrared light can undergo a photothermal reaction with the second medium. Specifically, the first medium on the first curved surface 211 cannot absorb infrared light, so the loss of infrared light propagating to the second curved surface 212 is low. The second medium on the second curved surface 212 can generate a photothermal effect when it receives infrared light, causing the surface of the second curved surface 212 to heat up rapidly for surface sterilization. At the same time, it improves the catalytic reaction efficiency of the first medium with ultraviolet light, enhances catalytic performance, and improves the stability of the first medium.

[0050] The second medium can be a metal oxide or a carbon material.

[0051] Thus, the infrared light and the second medium produce a photothermal reaction, which not only sterilizes the surface of the second curved surface 212, but also improves the efficiency of the catalytic reaction between the ultraviolet light and the first medium, makes up for the short propagation distance of the ultraviolet light, enhances the catalytic effect, and improves the energy utilization rate of the light source 22.

[0052] like Figure 5As shown, the light source 22 includes a first LED bead 221, which is disposed on the side of the first curved surface 211 opposite to the second curved surface 212. The first LED bead 221 is used to emit ultraviolet light. Specifically, the first LED bead 221 is disposed on the concave side of the filter 21, that is, on one side of the first curved surface 211, and the second curved surface 212 is disposed on the other side of the first curved surface 211. The first LED bead 221 is used to emit ultraviolet light. The ultraviolet light irradiates the first curved surface 211 and undergoes a catalytic reaction with the first medium to produce oxides, which are used for air sterilization and oxidation of indoor gaseous pollutants such as formaldehyde, benzene series compounds and other organic molecules.

[0053] Furthermore, there are multiple first LED beads 221, which are spaced apart along the first direction. That is, the multiple first LED beads 221 are spaced apart along the length of the filter 21 to ensure that the ultraviolet light emitted by the first LED beads 221 can irradiate all positions of the first curved surface 211, ensuring that the ultraviolet light fully reacts with the first medium on the first curved surface 211 to ensure the sterilization effect.

[0054] In some embodiments, the distance between two adjacent first LED beads 221 is L1, where L1 satisfies the relationship: 20 mm ≤ L1 ≤ 50 mm. Specifically, the distance between two adjacent first LED beads 221 is between 20 mm and 50 mm, ensuring that ultraviolet light can fully irradiate the first curved surface 211, so that the surface of the first curved surface 211 is uniformly covered with ultraviolet light, while ensuring that the light does not overflow, thus making full use of the energy of a single first LED bead 221.

[0055] Preferably, L1≥25mm, the distance between two adjacent first LED beads 221 is greater than or equal to 25mm, to avoid an excessive number of first LED beads 221, which would waste resources, while ensuring that the surface of the first curved surface 211 is uniformly covered with ultraviolet light, and to make full use of the energy of the first LED beads 221.

[0056] More preferably, L1≥30mm, the distance between two adjacent first LED beads 221 is greater than or equal to 30mm, reducing the number of first LED beads 221, reducing the cost of first LED beads 221, while ensuring that the surface of the first curved surface 211 is uniformly covered with ultraviolet light, making full use of the energy of the first LED beads 221.

[0057] Preferably, L1≤45mm, the distance between two adjacent first lamp beads 221 is less than or equal to 45mm, to avoid the number of first lamp beads 221 being too small, resulting in low intensity of ultraviolet light covering the surface of the first curved surface 211, which would lead to incomplete catalytic reaction between ultraviolet light and the first medium and reduce the sterilization effect.

[0058] More preferably, L1≤40mm, the distance between two adjacent first lamp beads 221 is less than or equal to 40mm, while reducing the number of first lamp beads 221, ensuring that the surface of the first curved surface 211 is covered with sufficient ultraviolet light intensity, ensuring the catalytic reaction effect of ultraviolet light and the first medium, and ensuring the sterilization effect.

[0059] like Figure 5 As shown, the light source 22 includes a second LED 222, which is spaced apart from the first LED 221 along a first direction. The second LED 222 is used to emit infrared light. Specifically, the second LED 222 and the first LED 221 are disposed on the same side of the filter 21. The second LED 222 emits infrared light, which passes through the first curved surface 211 to the second curved surface 212. The infrared light reacts with the second medium on the second curved surface 212 to generate a photothermal reaction, causing the surface of the second curved surface 212 to heat up rapidly for surface sterilization. At the same time, it improves the catalytic reaction efficiency of the first medium with ultraviolet light, enhances the catalytic performance, and improves the stability of the first medium.

[0060] Furthermore, there are multiple second LED beads 222, which are spaced apart along the first direction. Specifically, the multiple second LED beads 222 are spaced apart along the length of the filter 21 to ensure that the infrared light emitted by the second LED beads 222 can illuminate all positions of the second curved surface 212, ensuring that the second medium on the second curved surface 212 can fully react with the infrared light to ensure the sterilization effect and enhance the catalytic effect.

[0061] In some embodiments, the distance between two adjacent second LED beads 222 is L2, where L2 satisfies the relationship: 20 mm ≤ L2 ≤ 50 mm. Specifically, the distance between two adjacent second LED beads 222 is between 20 mm and 50 mm, ensuring that infrared light can fully illuminate the second curved surface 212, so that the surface of the second curved surface 212 is uniformly covered with infrared light, while ensuring that the light does not overflow, thus making full use of the energy of a single second LED bead 222.

[0062] Preferably, L2≥25mm, the distance between two adjacent second LED beads 222 is greater than or equal to 25mm, to avoid having too many second LED beads 222 and wasting resources, while ensuring that the surface of the second curved surface 212 is uniformly covered with infrared light, and to make full use of the energy of the second LED beads 222.

[0063] More preferably, L2≥30mm, the distance between two adjacent second LED beads 222 is greater than or equal to 30mm, reducing the number of second LED beads 222, reducing the cost of second LED beads 222, while ensuring that the surface of the second curved surface 212 is uniformly covered with infrared light, and making full use of the energy of the second LED beads 222.

[0064] Preferably, L2≤45mm, and the distance between two adjacent second lamp beads 222 is less than or equal to 45mm, to avoid the number of second lamp beads 222 being too small, resulting in low infrared light intensity covering the surface of the second curved surface 212, which leads to incomplete photothermal interaction between the infrared light and the second medium, thus affecting the sterilization effect.

[0065] More preferably, L2≤40mm, the distance between two adjacent second lamp beads 222 is less than or equal to 40mm, while reducing the number of second lamp beads 222, ensuring that the infrared light intensity covering the surface of the second curved surface 212 is sufficient, ensuring the photothermal reaction effect between the infrared light and the second medium, and ensuring the sterilization effect.

[0066] In some embodiments, the light source 22 is disposed at the center of the filter 21, and the illumination area of ​​the light source 22 covers the inner surface of the filter 21. It should be noted that the light source 22 includes a lamp board, a first lamp bead 221 and a second lamp bead 222. The lamp board is fixed on the base plate, and a plurality of first lamp beads 221 and second lamp beads 222 are vertically and evenly embedded on the lamp board. The lamp board is at an angle relative to the base plate so that the first lamp beads 221 and second lamp beads 222 illuminate obliquely upward. This angle is related to the curvature of the filter 21 and the illumination angle of the first lamp beads 221 and second lamp beads 222.

[0067] Preferably, the illumination angle of the light source 22 is between 120° and 180° to ensure that the light source 22 can fully illuminate the first curved surface 211 and the second curved surface 212 on the filter 21, and to ensure that the light source 22 reacts completely with the first medium and the second medium.

[0068] The light source 22 can be selected to shine upward at 180°, evenly covering the surface of the filter 21, so that the light power density of the filter 21 surface in the area is the same, enhancing the light absorption effect and improving the air purification effect of the indoor unit 100 of the air conditioner.

[0069] The light source 22 can also be selected as a 120° light source 22 that shines obliquely upwards, which can cover the surface of the filter 21 in the area. At this time, the light power density shining on the surface of the filter 21 with the light source 22 as the center is the same, which enhances the light absorption effect and improves the air purification effect of the indoor unit 100 of the air conditioner.

[0070] Therefore, the illumination angle of the light source 22 is determined according to the curvature of the filter 21. The first lamp bead 221 and the second lamp bead 222 on the lamp board are arranged regularly and can illuminate the filter 21 at different angles, so that the light beam covers more of the surface of the filter 21 without the appearance of overlapping areas, thus avoiding the phenomenon that the light power density at the overlapping area is higher than that in other areas.

[0071] In some embodiments, a plurality of first openings are provided on the first curved surface 211, and a plurality of second openings are provided on the second curved surface 212, forming channels between the first and second openings. Specifically, the channels formed by the first and second openings are not through holes, but can be cross-linked pores. Compared to through holes with straight arrangement and no cross-linking between channels, the channels of the cross-linked pore structure are connected by cross-linking, forming a complex three-dimensional network structure. The channels are interconnected to form multiple airflow channels, allowing the airflow to better contact the first and second media on the first and second curved surfaces 211 and 212 when passing through, thereby improving the efficiency of the catalytic reaction. The cross-linked pore structure has a large number of channels, which can store gas or liquid and have a large surface area. The airflow at the filter 21 can fully participate in the photocatalytic and photothermal reactions, improving the air sterilization and purification effect.

[0072] In some embodiments, the porosity of the filter 21 is A, where A satisfies the relationship: 40% ≤ A ≤ 95%.

[0073] The porosity refers to the ratio of the area of ​​the openings to the surface area of ​​the opening region. Specifically, an porosity of 40%-95% means that there is a large proportion of voids in the material, which effectively promotes gas flow and improves air filtration and purification efficiency.

[0074] In some specific embodiments of the present invention, the porosity of the filter 21 is A, where A ≥ 40%.

[0075] In other words, the number of pores in filter 21 cannot be too small, and the porosity of the first curved surface 211 and the second curved surface 212 cannot be too low. With an porosity of 40%, airflow can pass through filter 21 relatively smoothly and react with the first and second media on filter 21, resulting in better indoor air purification. A porosity below 40% leads to fewer pores, restricted airflow, and thus affects the air conditioning's air delivery.

[0076] Furthermore, the reduced number of pores decreases the contact area between the airflow entering from the air inlet 11 or flowing out from the air outlet 12 and the filter 21. This prevents the airflow from fully contacting the oxides and the curved surface of the first curved surface 211, thus reducing the air purification effect. Therefore, the porosity of the filter 21 must not be less than 40%.

[0077] Preferably, the porosity of the filter screen 21 is not less than 50%, i.e., A≥50%. This increases the number of pores on the filter screen 21, increases the airflow channels, and increases the contact area between the airflow and the filter screen 21, which can ensure better air delivery efficiency and air purification effect.

[0078] In a further preferred embodiment, the porosity of filter 21 is not less than 60%, i.e., A≥60%. This further increases the number of pores on filter 21, significantly reducing air resistance at filter 21, improving air conditioning efficiency, and further increasing the surface area of ​​filter 21 in contact with airflow. This allows filter 21 to capture more harmful substances, significantly enhancing the purification effect of the indoor unit 100 of the air conditioner. Furthermore, despite the high pore ratio, it still maintains good strength and stability.

[0079] In some specific embodiments of the present invention, the porosity of the filter 21 is A, where A ≤ 95%.

[0080] In other words, the number of pores in filter 21 cannot be excessive, and the porosity of filter 21 cannot be too high. A porosity of 95% means that there is very little solid material on filter 21, resulting in extremely low air resistance and high airflow efficiency, which helps improve air conditioning efficiency and reduce system energy efficiency. Simultaneously, the surface area of ​​airflow in contact with filter 21 is extremely large, significantly enhancing the air purification effect. However, due to an excessively high porosity, the overall strength of filter 21 is relatively low, and the design and assembly must consider how other components in the photocatalytic assembly 20 will work in conjunction with filter 21. Therefore, the porosity of filter 21 cannot exceed 95%, as too many pores can easily lead to deformation or breakage of filter 21 under pressure.

[0081] Preferably, the opening rate of filter 21 is no more than 80%, that is, A≤80%. Within this range, the airflow rate is appropriate, the air purification effect is good, and it can withstand greater pressure, thus extending the service life of filter 21.

[0082] Further preferably, the porosity of the filter 21 is no more than 70%, i.e., A≤70%. Within this range, it can still maintain a good airflow rate, without affecting the air conditioning supply. The contact area between the airflow and the catalytic active material in the filter 21 is moderate, without affecting the air purification effect. At the same time, it can maintain high strength, withstand greater pressure, and reduce the replacement frequency of the filter 21.

[0083] As shown in the figure, the photocatalytic component 20 also includes a support frame 23, which is disposed at the air inlet 11 or the air outlet 12. The support frame 23 is connected to the housing to complete the installation and fixation of the photocatalytic component 20. The support frame 23 is the main support and positioning structure of the photocatalytic component 20, maintaining the stability of the photocatalytic component 20 within the indoor unit 100 of the air conditioner.

[0084] Combination Figures 6-9As shown, the support frame 23 includes: a base 231, which is fixed to the air inlet 11, and a light source 22 disposed on the base 231. Specifically, the base 231 is disposed on the indoor heat exchanger 13, and the light source 22 is disposed on the base 231 with the light beam emitted by the light source 22 facing the air inlet 11. After indoor air enters through the air inlet 11, the gas flows through the photocatalytic component 20. The orientation of the light source 22 toward the air inlet 11 maximizes the effect of photocatalytic air purification, thereby purifying some polluting gases. Through multiple cycles, the purpose of indoor air purification can be achieved.

[0085] Reference Figure 6 , Figure 7 and Figure 9 As shown, the base 231 may include a mounting plate 2311, which is disposed at the bottom of the base 231, and there is at least one mounting plate 2311. Specifically, the mounting plate 2311 is a support structure in the base 231, used to ensure the stability of the base 231. The light source 22 can be fixed on the mounting plate 2311 to prevent the light source 22 from shaking or shifting.

[0086] In this embodiment, there can be three mounting plates 2311, and there are gaps between the three mounting plates 2311. After the indoor air passes through the photocatalytic component 20, it comes into contact with the indoor heat exchanger 13 and exchanges heat. The gaps between the mounting plates 2311 increase the contact area between the indoor air and the indoor heat exchanger 13, reduce wind resistance, and ensure good air supply of the indoor unit 100 of the air conditioner.

[0087] The base 231 may include two light-shielding plates 2312, which are disposed at both ends of at least one mounting plate 2311 to block part of the light beam. Specifically, a filter 21 is disposed above the base 231 and extends to both sides in the width direction, and the two light-shielding plates 2312 are disposed at both ends in the length direction of the base 231 to block the light beam emitted by the light source 22. The light-shielding plates 2312 cooperate with the filter 21 to ensure that the light beam emitted by the light source 22 is completely blocked, preventing light leakage.

[0088] The base 231 may include a support plate 2313, the two ends of which are connected between two light-shielding plates 2312 and spaced apart from the mounting plate 2311. A clamping space is formed between the support plate 2313, the two light-shielding plates 2312, and the frame 232. There is at least one support plate 2313. Specifically, the support plate 2313 is disposed above the base 231. The support plate 2313 includes an arc-shaped portion that can support the two light-shielding plates 2312 and the filter 21, thereby improving the structural strength of the base 231.

[0089] The base 231 may include a support rod 2314, which is disposed between the support plate 2313 and the mounting plate 2311 to support the support plate 2313 and improve the stability of the base 231. In this embodiment, there is one support rod 2314. In other embodiments, there may be two, three or more support rods 2314.

[0090] The support frame 23 includes a skeleton 232, one end of which is fixed to the base 231 and the other end is detachably fixed to the base 231, forming a clamping space between the skeleton 232 and the base 231. Specifically, a groove 2315 is provided on one side of the base 231, and one end of the skeleton 232 can slide along the groove 2315 and be nested in the base 231. With this configuration, the skeleton 232 and the base 231 can be easily disassembled, facilitating the installation of the filter screen 21.

[0091] Furthermore, the clamping space is arc-shaped and the shape of the filter 21 is adapted to the clamping space. In other words, the filter 21 can be an arc-shaped structure. Compared with the flat filter 21, the arc-shaped filter 21 is closer to the light source 22 on both sides, has a stronger ability to absorb the light source 22, and enhances the photocatalytic effect. Moreover, under the same installation volume, the arc-shaped filter 21 has a larger contact area with the polluted gas, resulting in a better air purification effect.

[0092] The filter screen 21 is installed in the clamping space, with its concave side (i.e., the first curved surface 211) fitting against the base 231 and its convex side (the second curved surface 212) fitting against the frame 232. The frame 232 may be provided with buckles, and the base 231 with slots. During the installation of the filter screen 21, the frame 232 remains movable. After the filter screen 21 fits against the frame 232 and the base 231, the frame 232 and the base 231 are fixed together using the buckles and slots, thus securing the filter screen 21 within the support frame 23.

[0093] In addition, power interfaces are provided on both sides of the photocatalytic component 20, and terminals are reserved in the electronic control device of the air conditioner indoor unit 100 for supplying power to the photocatalytic component 20.

[0094] The length of the photocatalytic component 20 can be adjusted as needed. For example, if half the length of the air outlet 12 of the air inlet 11 is used as the length of the photocatalytic component 20, then when the air conditioner is in fan-blowing or cooling / heating mode, half of the gas will flow through the photocatalytic component 20, achieving partial purification of pollutants. Through multiple cycles, the purpose of indoor air purification can be achieved. The photocatalytic component 20 can also be the same length as the air inlet 11 and the air outlet 12, fully covering the air inlet 11 and the air outlet 12, further improving purification efficiency.

[0095] An indoor unit 100 of an air conditioner according to a second aspect of the present invention includes: a housing 10, a fan assembly, a heat exchanger, and a photocatalytic assembly 20.

[0096] The housing 10 is provided with air inlets 11 and air outlets 12 spaced apart from each other. The housing 10 is used to protect the internal components, prevent the external environment from damaging the internal components, and provide support and protection for the internal components, ensuring that the components are installed in the designed positions, maintaining the structural stability and operating efficiency of the air conditioner indoor unit 100, and extending the service life of the air conditioner.

[0097] The casing 10 is provided with air inlets 11 and air outlets 12 spaced apart from each other. Indoor air enters the indoor unit 100 of the air conditioner through the air inlet 11 and is then output to the room through the air outlet 12, maintaining good airflow.

[0098] The fan assembly is located inside the housing 10. The fan assembly is configured to introduce airflow from outside the housing 10 into the housing 10 and output airflow from inside the housing 10 to the outside. The fan assembly provides power for the flow of indoor air and can maintain air circulation in the cabinet air conditioner.

[0099] The indoor heat exchanger 13 is installed inside the casing 10. The indoor heat exchanger 13 is responsible for exchanging heat between the refrigerant and the air introduced into the casing 10 by the fan assembly. After heat exchange, the air is then output to the outside by the fan assembly, thereby regulating the indoor temperature.

[0100] The photocatalytic component 20 is installed inside the housing 10. When indoor air enters the housing 10 and flows through the photocatalytic component 20, the photocatalytic component 20 can sterilize and purify the airflow at the air inlet 11 and / or the air outlet 12, thereby improving the quality of the air outlet 12.

[0101] The photocatalytic component 20 includes a light source 22 for emitting ultraviolet and infrared light. Specifically, ultraviolet light has a relatively short propagation distance, while infrared light has a relatively long propagation distance. Ultraviolet light can react with the photocatalyst to produce oxides, while infrared light can react with metal oxides or carbon materials to produce a photothermal reaction, thereby rapidly heating the material surface for surface sterilization.

[0102] The filter 21 has a first curved surface 211 and a second curved surface 212 formed on it. The second curved surface 212 is located on the side of the first curved surface 211 that is away from the light source 22. The first curved surface 211 and the second curved surface 212 are respectively coated with a first medium and a second medium. That is, the filter 21 has an arc-shaped structure, and the first curved surface 211 and the second curved surface 212 are two opposing surfaces. The second curved surface 212 is located on the side of the first curved surface 211 that is away from the light source 22, and the first curved surface 211 is located on the side of the filter 21 facing the light source 22. The first curved surface 211 is coated with a first medium, which can produce a catalytic reaction with ultraviolet light, and the second medium can produce a photothermal reaction with infrared light.

[0103] The first surface 211 and the second surface 212 have different curvatures. Specifically, the arc of the first surface 211 is different from that of the second surface 212, so that the filter 21 forms an arc-shaped three-dimensional structure that is thicker in the middle and thinner at both ends. The luminous intensity of the light source 22 depends on the angular direction: the light intensity is greatest in the normal direction, and the light intensity gradually decreases at different angles away from the normal direction. Therefore, the higher intensity light in the middle illuminates the thicker filter 21, and the lower intensity light at both ends illuminates the thinner filter 21, which can make full use of the energy of infrared light and ensure that the photothermal reaction between the second medium and infrared light is sufficient.

[0104] Therefore, the curvatures of the first surface 211 and the second surface 212 are different, and the thickness of the filter 21 is positively correlated with the intensity of the infrared light, ensuring that the infrared light fully reacts with the second medium and makes full use of the energy of the infrared light.

[0105] Preferably, the curvature of the second surface 212 is greater than that of the first surface 211. That is, the arc of the second surface 212 is greater than that of the first surface 211. The curvature of the convex surface of the filter 21 (the second surface 212) is related to the illumination intensity of the light source 22. The luminous intensity of the light source 22 depends on the angular direction: the light intensity is greatest in the normal direction, and gradually decreases at different angles away from the normal direction. Therefore, the higher intensity light in the middle illuminates the thicker filter 21, while the lower intensity light at both ends illuminates the thinner filter 21, which can fully utilize the energy of infrared light and ensure a sufficient photothermal reaction between the second medium and the infrared light.

[0106] More preferably, the cross-section of the second curved surface 212 along the first direction is an elliptical arc centered on the light source 22. Specifically, the second curved surface 212 is an elliptical arc, and the cross-section of the first curved surface 211 along the first direction can be an arc centered on the light source 22. The curvature of the second curved surface 212 is greater than that of the first curved surface 211, so that the filter 21 forms an arc-shaped three-dimensional structure that is thick in the middle and thin at both ends. The infrared light with high intensity in the middle irradiates the thicker filter 21 up to the second curved surface 212, while the light with low intensity at both ends irradiates the thinner filter 21 up to the second curved surface 212. This can make full use of the energy of the infrared light and ensure that the photothermal reaction between the second medium and the infrared light is sufficient.

[0107] Furthermore, let the eccentricity of the elliptical arc be B, where B satisfies the relationship: 0.1 ≤ B ≤ 0.8. That is, the eccentricity of the elliptical arc is between 0.1 and 0.8, ensuring that the curvature of the elliptical arc is greater than the curvature of the first surface 211, and that there is a certain thickness difference between the middle part and the two ends of the filter 21, so as to make full use of the energy of infrared light and ensure that the photothermal reaction between the second medium and the infrared light is sufficient.

[0108] Preferably, B≥0.2, the curvature difference between the second surface 212 and the first surface 211 should not be too large, and the thickness difference between the middle position and the two ends of the filter 21 is adjusted according to the light intensity attenuation of infrared light to ensure that infrared light can pass through the filter 21 and irradiate the two ends of the second surface 212, so as to make full use of the energy of infrared light.

[0109] More preferably, B≥0.3, the curvature difference between the second surface 212 and the first surface 211 should not be too large, but at the same time, the filter 21 is thicker in the middle and thinner at both ends, so that the infrared light intensity is strong in the middle and weak at both ends, ensuring that the infrared light can pass through the filter 21 and irradiate both ends of the second surface 212, making full use of the energy of the infrared light.

[0110] Preferably, B≤0.7, ensuring that the difference between the curvature of the second surface 212 and the curvature of the first surface 211 is not too small, avoiding excessive thickness at both ends of the filter 21, which would prevent some infrared light from passing through the filter 21 to irradiate both ends of the second surface 212, thereby making full use of the energy of the infrared light.

[0111] Preferably, B≤0.6, ensuring that the difference between the curvature of the second surface 212 and the curvature of the first surface 211 is within a better range, and that the thickness at both ends of the filter 21 is appropriate, so that infrared light can pass through the filter 21 and irradiate both ends of the second surface 212, thereby making full use of the energy of infrared light.

[0112] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0113] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0114] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An indoor unit of an air conditioner, comprising: The casing has air inlets and outlets spaced apart from each other; A fan assembly, which is disposed within the housing; An indoor heat exchanger is disposed inside the casing and is used to exchange heat with indoor air entering the casing. A photocatalytic component, which is disposed within the housing; The photocatalytic component is characterized by comprising: A light source used to emit ultraviolet and infrared light; The filter screen is arc-shaped, the light source is located in the concave surface of the filter screen, and a first curved surface and a second curved surface are formed on the filter screen. The first curved surface is the concave surface of the filter screen, and the second curved surface is the convex surface of the filter screen. When ultraviolet light irradiates the first curved surface, the ultraviolet light can undergo a catalytic reaction with the first curved surface; when infrared light irradiates the second curved surface, the infrared light can undergo a photothermal reaction with the second curved surface.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The light source includes: The first LED is disposed on the side of the first curved surface opposite to the second curved surface, and the first LED is used to emit the ultraviolet light; The second LED is arranged at a distance from the first LED along a first direction, and the second LED is used to emit the infrared light.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, There are multiple first LED beads, and the multiple first LED beads are spaced apart along a first direction; and, There are multiple second LED beads, which are spaced apart along the first direction.

4. The indoor unit of the air conditioner according to claim 1, characterized in that, The first curved surface is coated with a first medium, and the ultraviolet light can catalyze a reaction with the first medium. as well as, The second curved surface is coated with a second medium, and the infrared light can react with the second medium in a photothermal reaction.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, The filter screen has an opening ratio of A, where A satisfies the following formula: 40% ≤ A ≤ 95%.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, The photocatalytic component further includes: a support frame, the support frame comprising: A base, which is fixed to the air inlet, and a light source is disposed on the base; A frame, one end of which is fixed to the base and the other end is detachably fixed to the base, a clamping space is formed between the frame and the base, and the filter screen is disposed in the clamping space.

7. The indoor unit of the air conditioner according to claim 1, characterized in that, The photocatalytic component is disposed at the air inlet and / or the air outlet.

8. An indoor unit of an air conditioner, comprising: The housing has air inlets and air outlets spaced apart from each other. A fan assembly, wherein the fan assembly is disposed within the housing; An indoor heat exchanger is disposed inside the casing and is used to exchange heat with indoor air entering the casing. A photocatalytic component, wherein the photocatalytic component is disposed within the housing; The photocatalytic component is characterized by comprising: A light source used to emit ultraviolet and infrared light; The filter screen is arc-shaped, the light source is located in the concave surface of the filter screen, and a first curved surface and a second curved surface are formed on the filter screen. The first curved surface is the concave surface of the filter screen, and the second curved surface is the convex surface of the filter screen. The curvatures of the first surface and the second surface are different.

9. The indoor unit of the air conditioner according to claim 8, characterized in that, The curvature of the second surface is greater than that of the first surface.

10. The indoor unit of the air conditioner according to claim 9, characterized in that, The cross-section of the second curved surface along the first direction is an elliptical arc centered on the light source.

11. The indoor unit of the air conditioner according to claim 10, characterized in that, Let the eccentricity of the elliptical arc be B, and let B satisfy the relationship: 0.1≤B≤0.8.

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