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 an electric control unit in an existing air conditioner indoor unit is prone to condensation. Therefore, the air conditioner indoor unit comprises a machine shell, a heat exchanger, a fan and an electric control unit. The machine shell is provided with an air return opening and an air supply opening. The heat exchanger is arranged in the machine shell. The fan is arranged in the machine shell and is configured to drive air to flow from the air return opening to the air supply opening through the heat exchanger. And the electric control unit is arranged between the air return port and the heat exchanger on an air flow path. The temperature of the electric control unit of the indoor unit of the air conditioner can be basically consistent with the temperature of the external environment, and the phenomenon that in the prior art, due to the fact that the electric control unit in the indoor unit of the air conditioner is cooled by the evaporator, the temperature is lowered, and water in air is separated out to form condensation is avoided.

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] Existing air conditioners generally include an outdoor unit and an indoor unit. When the air conditioner is cooling, the outdoor unit releases heat and the indoor unit absorbs heat to cool the room. When the air conditioner is heating, the outdoor unit absorbs heat and the indoor unit releases heat to heat the room.

[0003] When cooling or heating, the air conditioner generally needs to rely on its refrigeration system. The refrigeration system includes a compressor, a condenser, a pressure-reducing component (expansion valve or capillary tube) and an evaporator connected end to end. Heat exchangers are arranged in the outdoor unit and the indoor unit respectively. When the air conditioner is working, the refrigerant in the refrigeration system circulates along the following path: compressor → condenser → pressure-reducing component → evaporator → compressor.

[0004] Specifically, when the refrigerant flows through the compressor, it is compressed by the compressor into a high temperature and high pressure state (liquid or gas-liquid mixed state). When the refrigerant flows through the condenser, the condenser dissipates heat and the temperature is reduced to a low temperature and high pressure state (liquid or gas-liquid mixed state). When the refrigerant flows through the pressure reducing component, it is throttled and reduced to a low temperature and low pressure state (liquid or gas-liquid mixed state) by the pressure reducing component. 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).

[0005] 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.

[0006] When the air conditioner is heating, the heat exchanger in the outdoor unit is used as an evaporator, and the heat exchanger in the indoor unit is used as a condenser. When the air conditioner is cooling, the heat exchanger in the outdoor unit is used as a condenser, and the heat exchanger in the indoor unit is used as an evaporator.

[0007] In order to realize the cooling, heating and control the flow of refrigerant of the air conditioner, the existing indoor unit is generally equipped with an electronic control unit (such as a circuit board). Usually, the electronic control unit is arranged at one end of the indoor unit in the length direction, that is, at the left end or the right end of the indoor unit.

[0008] However, the above arrangement of the electric control unit in the existing indoor unit not only increases the length of the indoor unit, but also makes it easy for condensation to occur in the electric control unit because the electric control unit is close to the evaporator in the indoor unit. Over time, the condensation on the electric control unit may cause corrosion, short circuit, failure, etc. of the electric control unit. Utility Model Content

[0009] One purpose of the utility model is to solve the problem that condensation is easy to occur in the electric control unit of the existing air-conditioning indoor unit.

[0010] A further object of the present invention is to ensure the working efficiency of the heat exchanger in the indoor unit of the air conditioner.

[0011] To achieve the above-mentioned object, the utility model provides an air conditioner indoor unit in a first aspect, comprising:

[0012] A housing having a return air vent and a supply air vent;

[0013] A heat exchanger is disposed in the casing;

[0014] a fan, disposed in the housing and configured to drive air from the return air port to the supply air port via the heat exchanger;

[0015] The electric control unit is arranged between the return air port and the heat exchanger on the flow path of the air.

[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 return air outlet is located on the upper side of the supply air outlet.

[0018] Optionally, in the vertical direction, the ratio of the height of the return air outlet to the height of the supply air outlet is selected from any value between 2 and 5.

[0019] Optionally, in the vertical direction, the ratio of the height of the return air outlet to the height of the supply air outlet is selected from any value between 2.5 and 3.5.

[0020] Optionally, the fan is a cross-flow fan; a portion of the heat exchanger is distributed on the front side and top side of the fan; the air conditioner indoor unit also includes a partition arranged in the casing, and the partition extends from the return air outlet toward the heat exchanger so that the air on the top side of the partition flows to the portion of the heat exchanger located on the top side of the fan.

[0021] Optionally, the ratio of the portion of the return air outlet located above the partition to the portion located below the partition is selected from any value between 1 / 5 and 1 / 3.

[0022] Optionally, the electronic control unit is arranged above the heat exchanger; and / or, the electronic control unit is arranged at the left end or the right end of the heat exchanger.

[0023] Optionally, the air-conditioning indoor unit is an embedded air-conditioning indoor unit.

[0024] 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.

[0025] Based on the foregoing description, those skilled in the art can understand that, in the aforementioned technical solution of the utility model, by arranging the electric control unit between the return air port and the heat exchanger on the air flow path, the air entering the indoor unit of the air conditioner first flows through the electric control unit and then flows to the heat exchanger, thereby avoiding the heat exchanger from cooling the electric control unit when it is used as an evaporator. Therefore, the temperature of the electric control unit of the indoor unit of the air conditioner in the utility model can be basically consistent with the temperature of the external environment, and the indoor unit of the air conditioner in the prior art will not have its temperature lowered due to the cooling of the electric control unit by the evaporator, and the water in the air will not be analyzed to form condensation.

[0026] Furthermore, when the air-conditioning indoor machine is heating, the electronic control unit will not be heated by the heat exchanger, thus preventing the performance of the electronic control unit from being reduced or damaged due to high temperature.

[0027] Furthermore, by forming both the return air outlet and the supply air outlet on the front side plate of the casing, the air conditioner indoor unit of the present invention can be embedded in a wall or other closed area. For example, the top side of the air conditioner indoor unit of the present invention can abut against the ceiling of the room.

[0028] Furthermore, by locating the return air outlet on the upper side of the supply air outlet, the cold air or hot air blown out from the supply air outlet can be directly blown to the area where the user is located without exchanging heat with the return air, thereby affecting the cooling or heating effect of the air conditioner.

[0029] Furthermore, in the vertical direction, by selecting the ratio of the height of the return air outlet to the height of the supply air outlet from any value between 2 and 5, the return air resistance of the air-conditioning indoor unit is reduced, the wind noise during the operation of the air-conditioning indoor unit is reduced, and the air volume of the air-conditioning indoor unit is ensured.

[0030] Furthermore, by extending the partition from the return air port to the heat exchanger, the air on the top side of the partition flows to the part of the heat exchanger located on the top side of the fan, so that air flows through all parts of the heat exchanger, thereby ensuring the working efficiency of the heat exchanger.

[0031] 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

[0032] 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:

[0033] Figure 1 is an axonometric view of an indoor unit of an air conditioner in some embodiments of the present utility model;

[0034] Figure 2 yes Figure 1 The effect view of the indoor unit of the air conditioner with part of the casing hidden;

[0035] Figure 3 yes Figure 1 A cross-sectional view of the indoor unit of the air conditioner along the AA direction;

[0036] Figure 4 It is a schematic diagram of the structure of air conditioners in other embodiments of the utility model. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Further, in the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. That is, in the description of the present invention, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] Unless otherwise defined, all terms (including technical terms and scientific terms) used in the description of the present invention have the same meanings as commonly understood by ordinary technicians in the technical field to which the present application belongs.

[0043] In the description of the utility model, the description with reference to the terms "a utility model", "some utility models", "illustrative utility models", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the utility model or example are included in at least one utility model or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same utility model or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more utility models or examples in a suitable manner.

[0044] like Figures 1 to 3 As shown, in some embodiments of the present invention, the air conditioner indoor unit 100 includes a casing 110 , a heat exchanger 130 , a fan 140 and an electronic control unit 150 .

[0045] The housing 110 has a return air port 1101 and a supply air port 1102 .

[0046] The heat exchanger 130 is disposed in the casing 110 .

[0047] The fan 140 is disposed in the housing 110 and is configured to drive air to flow from the return air port 1101 to the supply air port 1102 via the heat exchanger 130 .

[0048] The electronic control unit 150 is disposed between the return air port 1101 and the heat exchanger 130 on the air flow path.

[0049] Those skilled in the art will appreciate that, in some embodiments of the present invention, the electronic control unit 150 is disposed between the return air port 1101 and the heat exchanger 130 in the air flow path, so that the air entering the air-conditioning indoor unit 100 first flows through the electronic control unit 150 and then flows to the heat exchanger 130, thereby avoiding cooling of the electronic control unit 150 when the heat exchanger 130 acts as an evaporator.

[0050] Therefore, the temperature of the electric control unit 150 of the air-conditioning indoor unit 100 in the utility model can be basically consistent with the temperature of the external environment, and the air-conditioning indoor unit 100 in the prior art will not have its temperature lowered due to the internal electric control unit 150 being cooled by the evaporator, thereby analyzing water in the air to form condensation.

[0051] Furthermore, when the air-conditioning indoor unit 100 is heating, the electric control unit 150 will not be heated by the heat exchanger 130, thereby preventing the performance of the electric control unit 150 from being reduced or damaged due to high temperature.

[0052] like Figure 1 and Figure 3As shown, in some embodiments of the present invention, the housing 110 has a front side plate 111 , and the return air port 1101 and the supply air port 1102 are both formed on the front side plate 111 of the housing 110 .

[0053] It is understood by those skilled in the art that by forming both the return air vent 1101 and the air supply vent 1102 on the front side plate 111 of the housing 110, the air conditioner indoor unit 100 of the present invention can be embedded in other enclosed areas such as walls and cabinets or areas with smaller spaces. For example, the top side of the air conditioner indoor unit 100 of the present invention can abut against the ceiling of the room. In particular, the return air vent 1101 of the air conditioner indoor unit 100 of the present invention will not be blocked by a wall or a cabinet.

[0054] like Figure 1 and Figure 3 As shown, in some embodiments of the present invention, the return air outlet 1101 is located on the upper side of the supply air outlet 1102 .

[0055] Those skilled in the art can understand that by locating the return air outlet 1101 on the upper side of the air supply outlet 1102, the cold air or hot air blown out from the air supply outlet 1102 can be blown directly to the area where the user is located without exchanging heat with the return air, thereby affecting the cooling or heating effect of the air conditioner.

[0056] In addition, in other embodiments of the present invention, those skilled in the art may also locate the return air outlet 1101 at the lower side of the supply air outlet 1102 as required.

[0057] like Figure 3 As shown, in some embodiments of the present invention, in the vertical direction, the ratio of the height H1 of the return air outlet 1101 to the height H2 of the air supply outlet 1102 is selected from any value between 2 and 5. For example, the ratio of H1 to H2 can be 2, 2.5, 3, 3.1, 3.3, 4, 4.5, 5, etc.

[0058] 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 1101 to the height of the air supply outlet 1102 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.

[0059] Furthermore, in the vertical direction, the ratio of the height of the return air outlet 1101 to the height of the supply air outlet 1102 can be selected from any value between 2.5 and 3.5.

[0060] like Figures 1 to 3As shown, in some embodiments of the present invention, the air conditioner indoor unit 100 further includes an air guide plate 120 , which is installed at the air supply port 1102 to control the blowing direction of the air blown out from the air supply port 1102 .

[0061] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the fan 140 is a cross-flow fan.

[0062] In addition, in other embodiments of the present invention, those skilled in the art may also configure the fan 140 to any feasible form such as an axial flow fan, a centrifugal fan, etc. as needed.

[0063] Continue reading Figure 2 and Figure 3 In some embodiments of the present invention, a portion of the heat exchanger 130 is distributed on the front side and the top side of the fan 140 .

[0064] Specific as Figure 3 As shown, the heat exchanger 130 includes a first section 131 located in front of the fan 140 , a second section 132 located in the upper front side of the fan 140 , and a third section 133 located in the upper rear side of the fan 140 .

[0065] In addition, in other embodiments of the present invention, those skilled in the art may also configure the heat exchanger 130 to any other feasible structure as needed, such as a structure with a C-shaped or V-shaped cross-section.

[0066] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the air conditioner indoor unit 100 further includes a partition 160 disposed in the housing 110, and the partition 160 extends from the return air port 1101 to the heat exchanger 130, so that the air on the top side of the partition 160 flows to the portion of the heat exchanger 130 located on the top side of the fan 140. In other words, the partition 160 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.

[0067] Those skilled in the art will appreciate that by extending the partition 160 from the return air port 1101 toward the heat exchanger 130, the air on the top side of the partition 160 flows toward the portion of the heat exchanger 130 located on the top side of the fan 140, and thus air flows through each portion of the heat exchanger 130, 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.

[0068] Furthermore, the ratio of the portion H11 of the return air outlet 1101 located above the partition 160 to the portion H12 located below the partition 160 is selected from any value between 1 / 5 and 1 / 3.

[0069] The ratio may be any feasible value such as 1 / 5, 1 / 4, 1 / 3, etc.

[0070] Those skilled in the art will appreciate that by selecting the ratio of the portion H11 of the return air outlet 1101 located above the partition 160 to the portion H12 located below the partition 160 as any value between 1 / 5 and 1 / 3, sufficient air can flow through the top and rear of the heat exchanger 130, thereby making the air flow rate through each portion of the heat exchanger 130 substantially consistent, thereby improving the working efficiency of the heat exchanger 130.

[0071] Furthermore, the partition 160 may be fixedly connected to the housing 110 or may be integrally formed therewith.

[0072] In example 1, the partition plate 160 and the front side plate 111 are made integrally.

[0073] Example 2: A plug-in structure is provided on the partition 160, and a plug-in matching structure is provided on the front side plate 111. The partition 160 is plugged together with the front side plate 111 through the plug-in structure and the plug-in matching structure.

[0074] Example three: A vertical mounting plate is provided on the partition 160 , a through hole is provided on the mounting plate, and a threaded hole is provided on the front side plate 111 . Screws pass through the through holes and are tightened together with the threaded holes, thereby fixing the partition 160 to the front side plate 111 .

[0075] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the electronic control unit 150 is disposed above the heat exchanger 130 to prevent condensed water formed during cooling of the heat exchanger 130 from dripping onto the fan 140 .

[0076] Those skilled in the art will appreciate that by disposing the electronic control unit 150 above the heat exchanger 130, disposing the electronic control unit 150 on the left or right side of the heat exchanger 130 is avoided, thereby shortening the length of the air conditioner indoor unit 100 compared to the prior art.

[0077] like Figure 3 As shown, in some embodiments of the present invention, there is a gap between the electronic control unit 150 and the heat exchanger 130 to ensure the fluidity of air.

[0078] like Figure 2As shown, in some embodiments of the present invention, the electric control unit 150 is disposed at the left end or the right end of the heat exchanger 130 to reduce the resistance of the electric control unit 150 to the air.

[0079] like Figure 3 As shown, in some embodiments of the present invention, the air conditioner indoor unit 100 further includes a water receiving tray 170 disposed in the casing 110 .

[0080] Those skilled in the art will appreciate that the water receiving tray 170 is disposed below the heat exchanger 130 so as to receive the condensed water remaining on the heat exchanger 130 .

[0081] from Figures 1 to 3 As shown, the air-conditioning indoor unit 100 in some embodiments of the present invention may be a built-in air-conditioning indoor unit.

[0082] In addition, in other embodiments of the utility model, those skilled in the art may also, as needed, set the air-conditioning indoor unit 100 of the utility model to any other feasible form, such as an ordinary indoor unit, a cabinet unit, a central air conditioner, etc., on the premise that the electronic control unit 150 is located between the return air outlet 1101 and the heat exchanger 130 on the air flow path.

[0083] Furthermore, in some embodiments of the present invention, the electric control unit 150 may include electronic components such as circuit boards, capacitors, resistors, etc. The electric control unit 150 may also have a housing to enclose the electronic components.

[0084] like Figure 4 As shown, in other embodiments of the present invention, the present invention further provides an air conditioner 001 including an air conditioner outdoor unit 200 and an air conditioner indoor unit 100 described in any of the above embodiments.

[0085] In other embodiments of the present invention, when the air conditioner 001 is cooling, the air conditioner outdoor unit 200 releases heat, and the air conditioner indoor unit 100 absorbs heat to cool the room.

[0086] When the air conditioner 001 is heating, the air conditioner outdoor unit 200 absorbs heat, and the air conditioner indoor unit 100 releases heat to heat the room.

[0087] The air conditioner 001 generally needs to use its refrigeration system to complete cooling or heating.

[0088] 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.

[0089] Among them, the compressor and the pressure reducing member are generally provided in the air conditioner outdoor unit 200 .

[0090] Furthermore, a heat exchanger 130 is disposed in the air-conditioning outdoor unit 200 and the air-conditioning indoor unit 100 , respectively.

[0091] When the air conditioner 001 is working, the refrigerant in the refrigeration system circulates along the following path: compressor→condenser→pressure reducing component→evaporator→compressor.

[0092] Specifically, when the refrigerant flows through the compressor, it is compressed by the compressor into a high-temperature and high-pressure state (liquid state or a gas-liquid mixed state).

[0093] When the refrigerant flows through the condenser, it dissipates heat through the condenser and is cooled to a low temperature and high pressure state (liquid or gas-liquid mixed state).

[0094] 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 or gas-liquid mixed state).

[0095] 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).

[0096] 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.

[0097] When the air conditioner 001 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.

[0098] When the air conditioner 001 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.

[0099] 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.

[0100] 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.

[0101] 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 having a return air vent and a supply air vent; A heat exchanger is disposed in the casing; a fan, disposed in the housing and configured to drive air from the return air port to the supply air port via the heat exchanger; The electric control unit is arranged between the return air port and the heat exchanger on the flow path of the air.

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

3. The air conditioner indoor unit according to claim 2, characterized in that: The return air outlet is located on the upper side of the supply air outlet.

4. The air conditioner indoor unit according to claim 3, characterized in that: In the vertical direction, the ratio of the height of the return air outlet to the height of the supply air outlet is selected from any value between 2 and 5.

5. The air conditioner indoor unit according to claim 4, characterized in that: In the vertical direction, the ratio of the height of the return air outlet to the height of the supply air outlet is selected from any value between 2.5 and 3.

5.

6. The air conditioner indoor unit according to claim 3, characterized in that: The fan is a crossflow fan; A portion of the heat exchanger is distributed on the front side and the top side of the fan; The air conditioner indoor unit further comprises a partition plate arranged in the casing, wherein the partition plate extends from the return air port toward the heat exchanger so that the air on the top side of the partition plate flows toward the portion of the heat exchanger located on the top side of the fan.

7. The air conditioner indoor unit according to claim 6, characterized in that: The ratio of the return air outlet portion located above the partition to the return air outlet portion located below the partition is selected from any value between 1 / 5 and 1 / 3.

8. The air conditioner indoor unit according to any one of claims 1 to 7, characterized in that: The electric control unit is arranged above the heat exchanger; and / or, The electric control unit is arranged at the left end or the right end of the heat exchanger.

9. The air conditioner indoor unit according to any one of claims 1 to 7, characterized in that: The air-conditioning indoor unit is a built-in air-conditioning indoor unit.

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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