Air conditioner indoor unit and air conditioner

Abstract

The utility model belongs to the technical field of air conditioners, and particularly provides an air conditioner indoor unit and an air conditioner. The utility model aims to solve the problem that a liner for heat insulation in an existing air conditioner indoor unit occupies a large space. Therefore, the air conditioner indoor unit comprises a machine shell, a phase change material layer, a heat exchanger and a draught fan. The machine shell comprises an air return opening, an air supply opening and an air channel located between the air return opening and the air supply opening. The phase change material layer is arranged on the inner surface and / or the outer surface of the air duct of the machine shell. The heat exchanger is used for refrigerating or heating air in the air duct. And the fan is used for driving air in the air duct to flow from the air return port to the air supply port. Due to the fact that the phase change material is generally of a solid structure, compared with a liner in the prior art, the liner is smaller in thickness, occupies a small space of an air conditioner indoor unit, is more beneficial to achieving miniaturization of the air conditioner indoor unit, and overcomes the technical problems.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners, and specifically provides an air conditioner indoor unit and an air conditioner. Background Art

[0002] An air conditioner is a cooling and heating device, generally consisting of an indoor unit and an outdoor unit. An air conditioner generally uses the indoor unit for cooling and heating. Specifically, when the air conditioner is running in the cold winter, the indoor unit heats up the room, while when the air conditioner is running in the hot summer, the indoor unit cools down the room.

[0003] When the existing air conditioner indoor unit is cooling, condensation is easily generated around the air duct. In order to overcome this problem, the prior art generally places a pad around the air duct for heat insulation. However, this pad is generally a compressible elastic material similar to a sponge, which makes it thicker and occupies a large amount of space in the air conditioner indoor unit, resulting in poor space utilization of the air conditioner indoor unit, which is not conducive to the miniaturization of the air conditioner indoor unit. Utility Model Content

[0004] One purpose of the utility model is to solve the problem that the liner used for heat insulation in the indoor unit of the existing air conditioner occupies a lot of space.

[0005] To achieve the above-mentioned object, the utility model provides an air conditioner indoor unit in a first aspect, comprising:

[0006] A housing, comprising a return air inlet, an air supply inlet, and an air duct between the return air inlet and the air supply inlet;

[0007] A phase change material layer is disposed on the inner surface and / or outer surface of the housing on the air duct;

[0008] a heat exchanger for cooling or heating the air in the air duct;

[0009] The fan is used to drive the air in the air duct to flow from the return air outlet to the supply air outlet.

[0010] Optionally, the air duct comprises an upstream section located upstream of the fan and a downstream section located downstream of the fan; the phase change material layer is provided in the downstream section.

[0011] Optionally, the phase change material layer is disposed on an outer surface of the downstream section.

[0012] Optionally, the heat exchanger is arranged in the upstream section.

[0013] Optionally, the thickness of the phase change material layer is selected from any value between 0.1 mm and 10 mm.

[0014] Optionally, the thickness of the phase change material layer is selected from any value between 1 mm and 3 mm.

[0015] Optionally, the phase change material layer is a coating formed on the inner surface and / or outer surface of the air duct by spraying or brushing; and / or, the material of the phase change material layer includes phase change microcapsules.

[0016] Optionally, the return air outlet and the supply air outlet are both formed on the front side panel of the casing.

[0017] Optionally, the air-conditioning indoor unit is an embedded air-conditioner.

[0018] The utility model provides an air conditioner in a second aspect, comprising an air conditioner outdoor unit and an air conditioner indoor unit as described in any one of the first aspects.

[0019] Based on the foregoing description, those skilled in the art can understand that, in the aforementioned technical solution of the utility model, by providing a phase change material layer on the inner surface and / or outer surface of the air duct, the phase change material layer absorbs cold energy, thereby effectively preventing condensation from forming around the air duct. Since the phase change material is usually a solid structure, compared with the gasket in the prior art, the thickness is smaller, the space occupied by the air conditioner indoor unit is less, and it is more conducive to miniaturization of the air conditioner indoor unit.

[0020] Furthermore, since the air upstream of the fan has just entered the casing from the external environment and has a relatively high temperature, condensation is not likely to occur in the upstream section of the air duct upstream of the fan; therefore, the utility model reduces the use of the phase change material layer and reduces the production cost of the air conditioner indoor unit by arranging the phase change material layer in the downstream section of the air duct downstream of the fan.

[0021] Furthermore, by arranging the phase change material layer on the outer surface of the downstream section, it is convenient for workers to arrange the phase change material layer on the casing.

[0022] Furthermore, by selecting the thickness of the phase change material layer from any value between 0.1 mm and 10 mm, while ensuring that the phase change material layer has sufficient cooling capacity, the thickness of the phase change material layer is prevented from being too large.

[0023] Furthermore, by setting the phase change material layer as a coating formed on the inner surface and / or outer surface of the air duct by spraying or brushing, the area on the inner surface and / or outer surface of the air duct where the phase change material layer is required to be arranged can be covered more comprehensively and evenly by the phase change material layer. However, the gasket in the existing air conditioner indoor unit is easily affected by human factors during pasting, resulting in poor anti-condensation effect of the air conditioner indoor unit. The phase change material layer formed by spraying or brushing in the air conditioner indoor unit of the utility model overcomes this problem.

[0024] Other beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand the improved purposes, features and advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the utility model, some embodiments of the utility model will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the same figure number indicates the same or similar parts or components in different drawings; the drawings of the utility model are not necessarily drawn to scale. In the drawings:

[0026] Figure 1 It is a schematic diagram of the effect of the indoor unit of the air conditioner in some embodiments of the utility model;

[0027] Figure 2 yes Figure 1 A schematic cross-sectional view of the indoor unit of the air conditioner along the AA direction;

[0028] Figure 3 It is a partial schematic diagram of the air duct and the phase change material layer in some embodiments of the utility model;

[0029] Figure 4 It is a schematic diagram of the structure of a phase change microcapsule provided by the utility model;

[0030] Figure 5 It is a schematic diagram of the installation of an indoor unit of an air conditioner in some embodiments of the utility model;

[0031] Figure 6 It is a schematic diagram of the composition of the air conditioner in the utility model. DETAILED DESCRIPTION

[0032] It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention, and the embodiments are intended to explain the technical principles of the present invention, rather than to limit the protection scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should still fall within the protection scope of the present invention.

[0033] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] Furthermore, it should be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. For example, the terms "install", "connect", "connect" and "fix", unless otherwise specifically described, can specifically be any feasible connection form such as bolt connection, screw connection, welding, plug-in, riveting, melting, and clamping.

[0035] In addition, it should be noted that in the description of the present utility model, the terms "cold" and "heat" are two descriptions of the same physical state. That is, the higher the "cold" of a certain target object (such as an evaporator, air, condenser, etc.), the lower the "heat" it has, and the lower the "cold" it has, the higher the "heat" it has. A certain target object will release "heat" while absorbing "cold", and will absorb "heat" while releasing "cold". A certain target object stores "cold" or "heat" in order to keep the current temperature of the target object. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, that is, a certain target object (such as an evaporator) will absorb heat while cooling.

[0036] Finally, it should be noted that in the description of the present invention, each functional module can be a physical module composed of multiple structures, components or electronic components, or a virtual module composed of multiple programs; each functional module can be a module that exists independently of each other, or a module divided according to the function of an integral module. It should be understood by those skilled in the art that, under the premise of being able to implement the technical solution described in the present invention, the composition, implementation and positional relationship of each functional module will not deviate from the technical principle of the present invention no matter how they change, and therefore should fall within the protection scope of the present invention.

[0037] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the air conditioner indoor unit 100 includes a casing 110 , a phase change material layer 120 , a heat exchanger 130 and a fan 140 .

[0038] The housing 110 includes a return air port 111 , a supply air port 112 , and an air duct 113 between the return air port 111 and the supply air port 112 .

[0039] The phase change material layer 120 is disposed on the inner surface and / or outer surface of the air duct 113 of the housing 110 .

[0040] The heat exchanger 130 is used to cool or heat the air in the air duct 113 .

[0041] Furthermore, when the air conditioner indoor unit 100 is cooling, the heat exchanger 130 is used as an evaporator to cool the air in the casing 110 ; when the air conditioner indoor unit 100 is heating, the heat exchanger 130 is used as a condenser to heat the air in the casing 110 .

[0042] The fan 140 is used to drive the air in the air duct 113 to flow from the return air port 111 to the supply air port 112 .

[0043] It is understood by those skilled in the art that, in some embodiments of the present invention, a phase change material layer 120 is provided on the inner surface and / or outer surface of the air duct 113 so as to absorb cold through the phase change material layer 120, thereby effectively preventing condensation from forming around the air duct 113. Since the phase change material is generally a solid structure, it has a smaller thickness than the gasket in the prior art, occupies less space in the air conditioner indoor unit 100, and is more conducive to miniaturization of the air conditioner indoor unit 100.

[0044] like Figure 2 As shown, in some embodiments of the present invention, the air duct 113 includes an upstream section 1131 located upstream of the fan 140 and a downstream section 1132 located downstream of the fan 140. The downstream section 1132 is provided with a phase change material layer 120.

[0045] Those skilled in the art will appreciate that, since the air upstream of the fan 140 has just entered the casing 110 from the outside environment and has a relatively high temperature, it is not easy for condensation to occur in the upstream section 1131 of the air duct 113 located upstream of the fan 140; therefore, the utility model reduces the use of the phase change material layer 120 by setting the phase change material layer 120 in the downstream section 1132 of the air duct 113 located downstream of the fan 140, thereby reducing the production cost of the air conditioner indoor unit 100.

[0046] In addition, in other embodiments of the present invention, those skilled in the art may also dispose a phase change material layer 120 in the upstream section 1131 as needed.

[0047] Furthermore, in some embodiments of the present invention, the phase change material layer 120 may be disposed on the outer surface of the downstream section 1132 .

[0048] Those skilled in the art will appreciate that by disposing the phase change material layer 120 on the outer surface of the downstream section 1132 , it is convenient for workers to dispose the phase change material layer 120 on the housing 110 .

[0049] In addition, in other embodiments of the present invention, those skilled in the art may also dispose the phase change material layer 120 on the inner surface of the downstream section 1132 as needed.

[0050] Alternatively, those skilled in the art may also, as required, Figure 2 As shown, the phase change material layer 120 is disposed on the inner surface of a portion of the downstream section 1132 , and the phase change material layer 120 is disposed on the outer surface of another portion of the downstream section 1132 .

[0051] Alternatively, those skilled in the art may also respectively set a phase change material layer 120 on the inner surface and the outer surface of the downstream section 1132 as needed.

[0052] like Figure 2 As shown, in some embodiments of the present invention, the heat exchanger 130 is disposed in the upstream section 1131 .

[0053] Furthermore, the heat exchanger 130 is disposed adjacent to the downstream section 1132, so that the air in the upstream section 1131 quickly enters the fan 140 after passing through the heat exchanger 130, effectively preventing or reducing the air cooled by the heat exchanger 130 from contacting the side wall of the upstream section 1131, thereby effectively avoiding condensation in the upstream section 1131. This ensures that the phase change material layer 120 is only disposed in the downstream section 1132 of the air conditioner indoor unit 100, and can also effectively avoid condensation around the air duct 113.

[0054] like Figure 3 As shown, in some embodiments of the present invention, the thickness D of the phase change material layer 120 is selected from any value between 0.1 mm and 10 mm, for example, 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, 5 mm, 7 mm, 8 mm, 10 mm, etc.

[0055] Further, the thickness D of the phase change material layer 120 is selected from any value between 1 mm and 3 mm, for example, 1 mm, 1.5 mm, 2 mm, 3 mm, etc.

[0056] Those skilled in the art will appreciate that by selecting the thickness D of the phase change material layer 120 from any value between 0.1 mm and 10 mm, and in particular from any value between 1 mm and 3 mm, while ensuring that the phase change material layer 120 has sufficient cooling capacity, the thickness D of the phase change material layer 120 is prevented from being too large.

[0057] Furthermore, in some embodiments of the present invention, the phase change material layer 120 may be a coating formed on the inner surface and / or outer surface of the air duct 113 by spraying or brushing.

[0058] It is understood by those skilled in the art that by setting the phase change material layer 120 as a coating formed on the inner surface and / or outer surface of the air duct 113 by spraying or brushing, the area on the inner surface and / or outer surface of the air duct 113 where the phase change material layer 120 needs to be arranged can be covered more comprehensively and more evenly by the phase change material layer 120. However, the gasket in the existing air conditioning indoor unit 100 is easily affected by human factors during pasting, resulting in the poor anti-condensation effect of the air conditioning indoor unit 100. The phase change material layer 120 formed by spraying or brushing in the air conditioning indoor unit 100 of the utility model overcomes this problem.

[0059] Those skilled in the art can also understand that, since the air conditioner indoor unit 100 does not work all the time when cooling, but works intermittently, the phase change material layer 120 absorbs cold energy when the air conditioner indoor unit 100 is cooling, preventing condensation around the air duct 113; and absorbs heat or releases cold energy when the air conditioner indoor unit 100 is not cooling, thereby ensuring the cold storage capacity of the phase change material layer 120.

[0060] like Figure 4 As shown, in some embodiments of the present invention, the material of the phase change material layer 120 includes phase change microcapsules 121 .

[0061] Furthermore, the phase-change microcapsule 121 includes a capsule core 1211 and a capsule wall 1212 .

[0062] The capsule core 1211 is a phase change material, which is encapsulated in the capsule wall 1212. The phase change material can absorb or release heat within a specific temperature range (e.g., 16°C to 21°C) and undergo a solid-liquid or liquid-solid phase change, thereby storing and releasing a large amount of heat, thereby preventing the surface temperature of the phase change material layer 120 from being too low, and further preventing the occurrence of condensation.

[0063] The capsule wall 1212 is usually made of polymer materials, such as polystyrene, polymethyl methacrylate, urea-formaldehyde resin, melamine resin, etc. These materials can prevent leakage of the phase change material and provide sufficient durability and stability. The encapsulation process of the phase change microcapsule 121 can be achieved by different technologies, such as in-situ polymerization, interfacial polymerization, suspension polymerization, emulsion polymerization, etc.

[0064] In addition, those skilled in the art may also integrally mold the phase change microcapsules 121 onto the housing 110 as needed.

[0065] Return to continue reading Figure 1 and Figure 2 The return air port 111 and the supply air port 112 are both arranged on the front side panel of the housing 110 .

[0066] Those skilled in the art will appreciate that by arranging both the return air vent 111 and the supply air vent 112 on the front side panel of the housing 110, the air conditioner indoor unit 100 can be installed in a small space, without having to reserve more top return air space like a traditional wall-mounted air conditioner. Therefore, the air conditioner indoor unit 100 of the utility model has more applicable scenarios and better return air effect.

[0067] Furthermore, in some embodiments of the present invention, the return air outlet 111 is located on the upper side of the supply air outlet 112 .

[0068] Furthermore, in the vertical direction, the ratio of the height of the return air outlet 111 to the height of the air supply outlet 112 can be selected from any value between 2 and 5. For example, the ratio can be 2, 2.5, 3, 3.1, 3.3, 4, 4.5, 5, etc.

[0069] It will be understood by those skilled in the art that, in the vertical direction, by selecting the ratio of the height of the return air outlet 111 to the height of the air supply outlet 112 from any value between 2 and 5, the return air resistance of the air-conditioning indoor unit 100 is reduced, the wind noise during the operation of the air-conditioning indoor unit 100 is reduced, and the air volume of the air-conditioning indoor unit 100 is ensured.

[0070] In addition, in other embodiments of the present invention, those skilled in the art may also respectively set the return air outlet 111 on the front side plate and the top side plate of the casing 110 as needed.

[0071] Alternatively, those skilled in the art may also dispose the return air outlet 111 at the lower side of the air supply outlet 112 as needed.

[0072] like Figure 2As shown, in some embodiments of the present invention, the air conditioner indoor unit 100 may further include a partition 150. The partition 150 is disposed in the housing 110 and extends from the return air port 111 to the heat exchanger 130, so that the air on the top side of the partition 150 flows to the portion of the heat exchanger 130 located on the top side of the fan 140. In other words, the partition 150 divides the housing 110 into two return air passages, one of which leads to the front of the heat exchanger 130 and the other leads to the rear of the heat exchanger 130.

[0073] It is understood by those skilled in the art that by extending the partition 150 from the return air port 111 to the heat exchanger 130, the air on the top side of the partition 150 flows to the portion of the heat exchanger 130 located on the top side of the fan 140, and then all parts of the heat exchanger 130 are flowed by air, thereby ensuring the working efficiency of the heat exchanger 130. In addition, ice formation at the rear of the heat exchanger 130 due to insufficient air volume is avoided.

[0074] Furthermore, the partition 150 may be fixedly connected to the housing 110 or may be integrally formed therewith.

[0075] In example 1, the partition plate 150 is integrally formed with the front side plate of the housing 110 .

[0076] Example 2: A plug-in structure is provided on the partition 150, and a plug-in matching structure is provided on the front side plate of the housing 110. The partition 150 is plugged together with the front side plate of the housing 110 through the plug-in structure and the plug-in matching structure.

[0077] Example three: A vertical mounting plate is provided on the partition 150, a through hole is provided on the mounting plate, and a threaded hole is provided on the front side plate of the casing 110. The screws pass through the through holes and are tightened together with the threaded holes, thereby fixing the partition 150 to the front side plate of the casing 110.

[0078] like Figure 5 As shown, in some embodiments of the present invention, the air conditioner indoor unit 100 further includes an air guide plate 160 , which is disposed at the air supply port 112 to control the blowing direction of the air flow at the air supply port 112 .

[0079] Furthermore, in some embodiments of the present invention, the air conditioner indoor unit 100 may include any feasible structure such as one air guide plate 160 , two air guide plates 160 , or three air guide plates 160 .

[0080] When there are two air guide plates 160, the two air guide plates 160 may be as follows: Figure 5As shown, the air guide plates 160 are arranged in an upper and lower part, and the rotation axes of the two air guide plates 160 can be arranged close to each other or far from each other. The two air guide plates 160 can also be arranged front and back, and the air guide plate 160 located at the front side can cover the air guide plate 160 at the rear side, so as to optimize the appearance of the air conditioner indoor unit 100 when the air conditioner indoor unit 100 is turned off.

[0081] Furthermore, the air guide plate 160 may be any feasible structure, such as a thin sheet structure, an arc-shaped structure, a columnar structure with an elliptical cross-section, etc.

[0082] Furthermore, a plurality of through holes may be provided on the air guide plate 160 so that when the air guide plate 160 is closed, the air-conditioning wind is blown out from the plurality of through holes, thereby preventing the air-conditioning wind from blowing directly onto the user.

[0083] When a plurality of through holes are provided on the air guide plate 160, a one-way diaphragm can be configured for each through hole. The one-way diaphragm is opened by the air-conditioning wind when the air conditioner is blowing, thereby ensuring the cooling and heating effects of the air conditioner. The one-way diaphragm is automatically closed when the air conditioner is stopped, so as to prevent dust from entering the interior of the housing 110 through the through hole.

[0084] like Figure 5 As shown, in some embodiments of the present invention, the air-conditioning indoor unit 100 may be a built-in air-conditioning unit, which may be embedded in the cabinet 001 or in any other feasible space.

[0085] In addition, the utility model also provides an air conditioner 002.

[0086] like Figure 6 As shown, the air conditioner 002 includes the air conditioner indoor unit 100 and the air conditioner outdoor unit 200 described in any of the above embodiments.

[0087] When the air conditioner 002 is cooling, the air conditioner outdoor unit 200 releases heat, and the air conditioner indoor unit 100 absorbs heat to cool the room.

[0088] When the air conditioner 002 is heating, the air conditioner outdoor unit 200 absorbs heat, and the air conditioner indoor unit 100 releases heat to heat the room.

[0089] The air conditioner 002 generally needs to use its refrigeration system to complete cooling or heating.

[0090] The refrigeration system includes a compressor, a condenser, a pressure reducing component (an expansion valve or a capillary tube) and an evaporator which are connected end to end in sequence.

[0091] Among them, the compressor and the pressure reducing member are generally provided in the air conditioner outdoor unit 200 .

[0092] Furthermore, a heat exchanger 130 is disposed in the air-conditioning outdoor unit 200 and the air-conditioning indoor unit 100 , respectively.

[0093] When the air conditioner 002 is working, the refrigerant in the refrigeration system circulates along the following path: compressor→condenser→pressure reducing component→evaporator→compressor.

[0094] When the refrigerant flows through the compressor, it is compressed into a high-temperature and high-pressure state (liquid or gas-liquid mixed state).

[0095] When the refrigerant flows through the condenser, it dissipates heat through the condenser and cools down to a low temperature and high pressure state (liquid or gas-liquid mixed state).

[0096] When the refrigerant flows through the pressure reducing component, it is throttled and reduced in pressure to a low-temperature and low-pressure state (liquid state or gas-liquid mixed state).

[0097] When the refrigerant flows through the evaporator, it absorbs heat from the external environment through the evaporator and heats up to a high-temperature and low-pressure state (gaseous state).

[0098] Among them, the aforementioned states of the refrigerant in the compressor, condenser, pressure reducing component, and evaporator, that is, the high temperature, low temperature, high pressure, and low pressure of the refrigerant, are the states of the refrigerant after entering the corresponding components or flowing out of the corresponding components compared to the states before it flows into the corresponding components.

[0099] When the air conditioner 002 is heating, the heat exchanger 130 in the air conditioner outdoor unit 200 is used as an evaporator, and the heat exchanger 130 in the air conditioner indoor unit 100 is used as a condenser.

[0100] When the air conditioner 002 is cooling, the heat exchanger 130 in the air conditioner outdoor unit 200 is used as a condenser, and the heat exchanger 130 in the air conditioner indoor unit 100 is used as an evaporator.

[0101] It should be noted that the present invention only describes the main components of the refrigeration system and the general refrigerant flow path. In actual product applications, the refrigeration system may also have at least one series and / or parallel branch.

[0102] Furthermore, it should be noted that the air conditioner indoor unit 100 of the present invention is not limited to the one shown in the drawings, and it can be any feasible air conditioner indoor unit 100. For example, it can be a cabinet air conditioner, a central air conditioner, and the like.

[0103] So far, the technical solution of the utility model has been described in combination with the above multiple embodiments, but it is easy for those skilled in the art to understand that the protection scope of the utility model is not limited to these specific embodiments. Without departing from the technical principle of the utility model, those skilled in the art can split and combine the technical solutions in the above embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principle of the utility model will fall within the protection scope of the utility model.

[0104] Finally, it should be noted that in the present invention, the term "communication" means fluid communication, so as to allow fluid (such as air, liquid) to flow between two connected objects. And the "communication" can be to allow the fluid to flow between the two connected objects without leakage, or to allow the fluid to flow between the two connected objects with a little leakage.

Claims

1. An air conditioner indoor unit, characterized in that: include: A housing, comprising a return air inlet, an air supply inlet, and an air duct between the return air inlet and the air supply inlet; A phase change material layer is disposed on the inner surface and / or outer surface of the housing on the air duct; a heat exchanger for cooling or heating the air in the air duct; The fan is used to drive the air in the air duct to flow from the return air outlet to the supply air outlet.

2. The air conditioner indoor unit according to claim 1, characterized in that: The air duct includes an upstream section located upstream of the fan and a downstream section located downstream of the fan; The downstream section is provided with the phase change material layer.

3. The air conditioner indoor unit according to claim 2, characterized in that: The phase change material layer is disposed on the outer surface of the downstream section.

4. The air conditioner indoor unit according to claim 2, characterized in that: The heat exchanger is disposed in the upstream section.

5. The air conditioner indoor unit according to claim 1, characterized in that: The thickness of the phase change material layer is selected from any value between 0.1 mm and 10 mm.

6. The air conditioner indoor unit according to claim 5, characterized in that: The thickness of the phase change material layer is selected from any value between 1 mm and 3 mm.

7. The air conditioner indoor unit according to any one of claims 1 to 6, characterized in that: The phase change material layer is a coating formed on the inner surface and / or outer surface of the air duct by spraying or brushing; and / or, The material of the phase change material layer includes phase change microcapsules.

8. The air conditioner indoor unit according to any one of claims 1 to 6, characterized in that: The return air port and the supply air port are both formed on the front side plate of the housing.

9. The air conditioner indoor unit according to claim 8, characterized in that: The air-conditioning indoor unit is an embedded air-conditioning.

10. An air conditioner, characterized in that: The invention comprises an air-conditioning outdoor unit and the air-conditioning indoor unit according to any one of claims 1 to 9.

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