Embedded air conditioner indoor unit

Abstract

The utility model provides an embedded air conditioner indoor unit. The embedded air conditioner indoor unit comprises a machine shell, a fan, a heat exchanger and a water pan. An air inlet and an air outlet located above the air inlet are formed in the front side of the machine shell. The draught fan is arranged in the machine shell and used for promoting air outside the machine shell to enter the machine shell through the air inlet, and air inlet airflow is formed. The heat exchanger is arranged in the machine shell, at least part of the heat exchanger is located below the draught fan, an interval is formed between the heat exchanger and a bottom plate of the machine shell, the heat exchanger is used for exchanging heat with the inlet air flow to form heat exchange air flow, and the heat exchange air flow is blown out through the air outlet under the action of the draught fan. The water pan is arranged above the bottom plate, located below the heat exchanger and used for receiving condensate water dripping from the heat exchanger. According to the embedded air conditioner indoor unit, the air outlet and water blowing problems of the embedded air conditioner indoor unit are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an embedded type air-conditioning indoor unit. Background Art

[0002] Air conditioners are used to regulate indoor air, including adjusting the temperature, humidity, and air quality of the air, humidifying and dehumidifying the indoor air, introducing fresh air, etc. Air conditioners consist of a vapor compression refrigeration cycle system consisting of an evaporator, condenser, compressor, throttling device, and other necessary components. The air conditioner outputs cold / hot air through a fan to achieve cooling and heating of the indoor environment.

[0003] The embedded air conditioner indoor unit is a new type of air conditioner indoor unit, which is used for embedded installation, such as embedded in a cabinet or other cabinets. Due to the obstruction of the cabinet, only the front side of the embedded air conditioner indoor unit is exposed to the outside, so most of them adopt the form of front air intake.

[0004] However, the technicians of the utility model found that the air conditioning efficiency of the embedded air conditioner indoor unit with front air intake is always low, and no good solution can be found. Moreover, the embedded air conditioner indoor unit is also prone to water blowing phenomenon, and it is difficult to find the cause. Utility Model Content

[0005] The purpose of the utility model is to provide a built-in air-conditioning indoor unit which overcomes the above problems or at least partially solves the above problems.

[0006] One purpose of the utility model is to solve the problem that the indoor unit of the embedded air conditioner is prone to blow water out of the air.

[0007] Another object of the utility model is to improve the air conditioning energy efficiency of the embedded type air conditioner indoor unit.

[0008] In particular, the utility model provides a built-in air conditioner indoor unit, which includes:

[0009] A housing, the front side of which is provided with an air inlet and an air outlet located above the air inlet;

[0010] A fan, disposed in the housing, for causing air outside the housing to enter the housing through the air inlet to form an inlet airflow;

[0011] a heat exchanger disposed in the housing and at least partially below the fan and spaced apart from the bottom plate of the housing, the heat exchanger being used to exchange heat with the inlet airflow to form a heat exchange airflow, and the heat exchange airflow is blown out through the air outlet under the action of the fan; and

[0012] The water receiving tray is arranged above the bottom plate and below the heat exchanger, and is used for receiving condensed water dripping from the heat exchanger.

[0013] Optionally, the lowest point of the air inlet is at a height position lower than the lowest point of the heat exchanger, so as to allow the airflow in the lower section of the air inlet to flow directly backward to the space below the heat exchanger and then to the rear of the heat exchanger.

[0014] Optionally, the embedded air conditioner indoor unit further includes: a partition, arranged in the casing, for guiding the air flow in the lower section of the air inlet to flow to or remain in the space below the heat exchanger, and then flow to the rear of the heat exchanger.

[0015] Optionally, the partition is in the shape of a plate, which extends forward from the heat exchanger to the front plate of the casing.

[0016] Optionally, the partition extends forward from the lowest point of the heat exchanger to the front plate.

[0017] Optionally, a gap is formed between the water receiving tray and the partition to allow the incoming air flow to pass through.

[0018] Optionally, the heat exchanger is a multi-stage type, comprising a first heat exchange stage, a second heat exchange stage and a third heat exchange stage connected in sequence;

[0019] The first heat exchange section is erected in front of the fan and is spaced apart from the front plate of the housing, and the distance between the first heat exchange section and the front plate is greater than the thickness of the first heat exchange section;

[0020] The second heat exchange section extends obliquely backward and downward from the bottom of the first heat exchange section, and a gap is formed between the bottom of the second heat exchange section and the bottom plate; and

[0021] The third heat exchange section extends obliquely backward and upward from the bottom of the second heat exchange section.

[0022] Optionally, the distance between the lowest point of the heat exchanger and the bottom plate is greater than twice the average thickness of the heat exchanger.

[0023] Optionally, the front plate of the housing is in a grille shape, and the grille holes together constitute the air inlet; and

[0024] At least the grille holes of the lower section of the front plate are gradually inclined upward from the outside of the casing to the inside, so as to facilitate indoor air to enter the inside of the casing at an oblique upward angle.

[0025] Optionally, the ratio of the distance between the lower edge of the air outlet and the upper edge of the air inlet to the vertical dimension of the air outlet is less than 0.2.

[0026] The inventor of the utility model has found through research that the reason why the existing embedded air conditioner indoor unit is prone to the problem of water blowing out of the air is that the heat exchanger is arranged above the fan. When the air conditioner is in cooling operation, the surface temperature of the heat exchanger is low, and the temperature of the surrounding air drops. When the condensed water on the surface of the heat exchanger accumulates too much, it will drip down onto the fan and be blown out with the heat exchange air flow, causing the phenomenon of water blowing out of the air. In the embedded air conditioner indoor unit of the utility model, the air outlet is arranged below the air inlet, so that the heat exchanger is at least partially arranged below the fan, and the water receiving tray is arranged below the heat exchanger. In this way, when the air conditioner is in cooling operation, the condensed water generated by the heat exchanger drips directly into the water receiving tray, away from the fan, thereby solving the problem of water blowing out of the air.

[0027] In addition, the inventor of the utility model has found through research that the reason why the existing embedded air conditioner indoor unit has low air conditioning efficiency and the heat exchanger is prone to ice is related to the uneven distribution of the incoming air flow of the embedded air conditioner indoor unit. The embedded air conditioner indoor unit adopts the front airflow form, and the incoming air flow can blow to the front side of the heat exchanger more smoothly and directly, while it is more laborious or the process is more tortuous to flow to other parts of the heat exchanger, especially the rear part. This causes the incoming air flow rate received by various parts of the heat exchanger to be uneven, so that the heat exchange of different parts of the heat exchanger is uneven, resulting in the heat exchange capacity of the heat exchanger cannot be fully exerted, and its heat exchange efficiency is reduced, which in turn leads to a decrease in the air conditioning efficiency. At the same time, when the air conditioner is cooling, the part of the heat exchanger that receives less incoming air flow is insufficient in heat exchange, resulting in its low temperature and easy to freeze.

[0028] The solution of the utility model makes the height position of the lowest point of the air inlet lower than the lowest point of the heat exchanger, so as to allow the airflow in the lower section of the air inlet to flow directly backward to the space below the heat exchanger, and then flow to the rear of the heat exchanger, so that the lower and rear sections of the heat exchanger can obtain sufficient airflow, so that all parts of the heat exchanger can exchange heat evenly, give full play to the heat exchange capacity of the heat exchanger, make the heat exchange efficiency higher, and make the air conditioning function more energy-efficient.

[0029] Furthermore, the embedded air-conditioning indoor unit of the utility model is provided with a partition in the casing, which is used to guide the air flow in the lower section of the air inlet to flow to or remain in the space below the heat exchanger, and then flow to the rear of the heat exchanger, so that all parts of the heat exchanger can exchange heat evenly, fully exert the heat exchange capacity of the heat exchanger, make the heat exchange efficiency higher, and make the air conditioner function more energy-efficient.

[0030] Furthermore, in the embedded air-conditioning indoor unit of the utility model, the front panel of the casing is grille-shaped, and at least the grille holes in the lower section of the front panel are gradually inclined upward from the outside of the casing to the inside of the casing, so as to facilitate the air outside the casing to enter the inside of the casing at an upward angle, so that the airflow can better bypass the water tray and flow backwards, and it can also prevent the outlet airflow (heat exchange airflow) from mixing with the inlet airflow, and prevent the outlet airflow from mixing with the inlet airflow, resulting in a decrease in the air conditioning energy efficiency.

[0031] Furthermore, in the embedded air-conditioning indoor unit of the utility model, the heat exchanger is multi-stage and surrounded in front of and below the fan. The structure of the heat exchanger is the same as that of the traditional wall-mounted air-conditioning indoor unit, only the installation posture is reversed. The universality of materials can be achieved during production, and there is no need for additional design and mold opening, which saves production and management costs. Moreover, under this structure and layout of the fan and heat exchanger, the negative pressure in the space below the heat exchanger is the strongest after the fan is turned on. The embedded air-conditioning indoor unit adopts the front airflow form, which results in insufficient inlet air flow in the lower and rear sections of the heat exchanger, so that the area with the largest negative pressure cannot receive enough inlet air flow, and the heat exchange capacity of the heat exchanger cannot be exerted.

[0032] The present invention, by making the height position (or height coordinate) of the lowest point of the air inlet lower than the height position of the lowest point of the heat exchanger and setting a partition, can guide sufficient airflow to the lower and rear spaces of the heat exchanger, so that the lower and rear sections of the heat exchanger can obtain sufficient airflow, so that all parts of the heat exchanger can exchange heat evenly, give full play to the heat exchange capacity of the heat exchanger, make the heat exchange efficiency higher, and make the air conditioner more energy efficient. It can be seen that the present invention achieves a balance between production cost and air conditioning performance.

[0033] Based on the detailed description of some specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0035] Figure 1 is a schematic front view of a built-in air conditioner indoor unit according to an embodiment of the utility model;

[0036] Figure 2 yes Figure 1 NN section enlarged view;

[0037] Figure 3 yes Figure 2 Schematic diagram of the embedded air conditioner indoor unit in operation. DETAILED DESCRIPTION

[0038] In the description of this embodiment, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the utility model.

[0039] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, it is defined that the features "first", "second", etc. may explicitly or implicitly include at least one of the features, that is, include one or more of the features.

[0040] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0041] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "coupled" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0042] Furthermore, in the description of this embodiment, a first feature being “above” or “below” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0043] That is, in the description of this embodiment, 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.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used in the description of the embodiments of the present invention have the same meanings as those commonly understood by ordinary technicians in the technical field to which the present application belongs.

[0045] The embodiment of the utility model provides an embedded air conditioner indoor unit. The embedded air conditioner indoor unit is the indoor part of a split air conditioner or the indoor terminal model of a central air conditioner, and is used to adjust the indoor air, specifically, including adjusting the temperature, humidity, air quality of the air, humidifying, dehumidifying, introducing fresh air, etc. The air conditioner can be composed of an evaporator, a condenser, a compressor, a throttling device and other necessary components to form a vapor compression refrigeration cycle system, so as to output cold air / hot air through a fan to achieve cooling and heating of the indoor environment.

[0046] Figure 1 is a schematic front view of a built-in air conditioner indoor unit according to an embodiment of the utility model; Figure 2 yes Figure 1 NN section enlarged view; Figure 3 yes Figure 2 Schematic diagram of the embedded air conditioner indoor unit in operation.

[0047] like Figures 1 to 3 As shown, the embedded air conditioner indoor unit of the embodiment of the utility model may generally include a casing 10 , a fan 30 , a heat exchanger 20 and a water receiving tray 80 .

[0048] The front side of the housing 10 is provided with an air inlet 11 and an air outlet 12 located above the air inlet 11. The housing 10 is used to accommodate the main components of the embedded air conditioner indoor unit, including the fan 30, the heat exchanger 20, the electronic control module, etc. The housing 10 is used to be embedded in a cabinet or other structure, and its front side is exposed. The shape of the housing 10 is not limited in this embodiment. Figures 1 to 3 The case 10 is shown as a horizontally long strip. In addition, the case 10 can also be an upright column, square or other shapes. The case 10 has a bottom plate 120 constituting its top structure and a front plate 130 constituting its front structure. The bottom plate 120 and the front plate 130 face downward and forward respectively.

[0049] The fan 30 is disposed in the housing 10 to force the air outside the housing 10 to enter the housing 10 through the air inlet 11 to form an inlet airflow. The form of the fan 30 is not limited in this embodiment. Figures 1 to 3 The fan 30 is shown as a cross-flow type. In addition, the fan 30 can also be an axial flow type, a centrifugal type or other types.

[0050] The heat exchanger 20 is disposed in the housing 10, and at least partially below the fan 30. The heat exchanger 20 is used to exchange heat with the incoming air flow to form a heat exchange air flow. The heat exchange air flow is blown out through the air outlet 12 under the action of the fan 30. When the air conditioner operates in the cooling mode, the heat exchange air flow is a cold air flow. When the air conditioner operates in the heating mode, the heat exchange air flow is a hot air flow. Of course, the air conditioner can have only a cooling function, or have both cooling and heating functions.

[0051] Figure 2 and Figure 3 An optional structure of the housing 10, the heat exchanger 20 and the fan 30 is shown. Figure 2 and Figure 3 As shown, an air duct 15 may be formed in the housing 10, the outlet of the air duct 15 constitutes an air outlet 12, and the fan 30 is arranged at the inlet of the air duct 15. When the air conditioner is running, the fan 30 is turned on, causing the air outside the housing 10 to enter the housing 10 through the air inlet 11, and after completing the heat exchange with the heat exchanger 20, it flows into the air duct 15, and is guided by the air duct 15 and blown out through the air outlet 12. In the figure, the direction of the inlet air flow is indicated by solid arrows, and the direction of the outlet air flow (heat exchange air flow) is indicated by hollow arrows. Figure 2 and Figure 3 In the embodiment shown, the fan 30 is a cross-flow type, so the air duct 15 is a cross-flow air duct, which includes a front air duct wall 151, a rear air duct wall 152 and two transverse air duct walls, and the four air duct walls together form a cross-flow air duct.

[0052] The water receiving pan 80 is disposed above the bottom plate 120 and below the heat exchanger 20 , and is used to receive condensed water dripping from the heat exchanger 20 .

[0053] The inventor of the utility model has found through research that the reason why the existing embedded air conditioner indoor unit is prone to the phenomenon of water blowing out of the air is that the heat exchanger is arranged above the fan. When the air conditioner is in cooling operation, the surface temperature of the heat exchanger is low, the temperature of the surrounding air decreases, and the condensed water generated by condensation on the surface of the heat exchanger drips down onto the fan, and is blown out with the heat exchange air flow, causing water blowing out of the air. In the embedded air conditioner indoor unit of the embodiment of the utility model, the air outlet 12 is arranged below the air inlet 11, and the heat exchanger 20 is at least partially arranged below the fan 30, so that the water receiving tray 80 is arranged below the heat exchanger 20. In this way, when the air conditioner is in cooling operation, the condensed water generated by the heat exchanger 20 directly drips down into the water receiving tray 80, away from the fan 30, thereby solving the problem of water blowing out of the air.

[0054] In addition, the inventor of the utility model has found through research that the reason why the existing embedded air conditioner indoor unit has low air conditioning efficiency and the heat exchanger is prone to ice is related to the uneven distribution of the air intake airflow of the embedded air conditioner indoor unit. The embedded air conditioner indoor unit adopts the front airflow form, and the air intake airflow can blow to the front side of the heat exchanger 20 more smoothly and directly, while it is more laborious or the process is more tortuous to flow to other parts of the heat exchanger 20, especially the rear part. This causes the air intake airflow received by various parts of the heat exchanger 20 to be uneven, so that the heat exchange of different parts of the heat exchanger 20 is uneven, resulting in the heat exchange capacity of the heat exchanger 20 cannot be fully exerted, and its heat exchange efficiency is reduced, which leads to a decrease in air conditioning efficiency. At the same time, when the air conditioner is cooling, the part of the heat exchanger 20 that receives less air intake airflow is insufficient in heat exchange, resulting in its low temperature and easy to freeze.

[0055] To this end, in some embodiments of the present invention, Figure 3 As shown, the height position (or height coordinate) of the lowest point of the air inlet 11 can be made lower than the lowest point H of the heat exchanger 20, so as to allow the airflow in the lower section of the air inlet 11 to flow directly backward to the space below the heat exchanger 20, and then flow to the rear of the heat exchanger 20. The lower and rear sections of the heat exchanger 20 can obtain sufficient airflow, so that each part of the heat exchanger 20 can exchange heat evenly, give full play to the heat exchange capacity of the heat exchanger 20, make the heat exchange efficiency higher, and make the air conditioner function more energy-efficient. Figure 2 and Figure 3 As shown, it is preferred that the lowest point of the air inlet 11 is adjacent to the bottom plate 120 so that the lowest point of the air inlet 11 is as low as possible and the air intake is as unobstructed as possible.

[0056] Furthermore, in some embodiments, Figure 3 As shown, the embedded air conditioner indoor unit further includes a partition 90. The partition 90 is disposed in the housing 10 and is used to guide the airflow in the lower section of the air inlet 11 to flow to or remain in the space below the heat exchanger 20, and then flow to the rear of the heat exchanger 20. Figure 3 As shown, the partition 90 can be plate-shaped and extend forward from the heat exchanger 20 to the front plate 130 of the housing 10, and further extend forward from the lowest point H of the heat exchanger 20 to the front plate 130. Such a configuration enables the airflow below the partition 90 to flow backward more smoothly to reach the rear section of the heat exchanger 20 without being hindered by the heat exchanger 20 (especially the part near the H point), so that each part of the heat exchanger 20 can exchange heat evenly, give full play to the heat exchange capacity of the heat exchanger 20, make the heat exchange efficiency higher, and make the air conditioner function more energy-efficient.

[0057] Specifically, the partition 90 may be an independent component, and may be mounted on the housing 10 and / or the heat exchanger 20 by screw connection, clamping, bonding, etc. Alternatively, the partition 90 may be a part of the housing 10 or the heat exchanger 20.

[0058] In some embodiments, Figure 3 As shown, a gap can be formed between the water receiving tray 80 and the partition 90, that is, there is a distance between the highest point M of the water receiving tray 80 and the partition 90 to allow the incoming air flow to pass through and minimize the obstruction of the water receiving tray 80 to the incoming air flow.

[0059] In some embodiments, Figure 2 and Figure 3 As shown, the heat exchanger 20 can be a multi-stage type, which includes a first heat exchange section 210, a second heat exchange section 220 and a third heat exchange section 230 connected in sequence. Among them, the first heat exchange section 210 stands in front of the fan 30 and is spaced apart from the front plate 130 of the housing 10. The second heat exchange section 220 extends obliquely from the bottom of the first heat exchange section 210 to the rear and downward, and the bottom of the second heat exchange section 220 is spaced apart from the bottom plate 120. The third heat exchange section 230 extends obliquely from the bottom of the second heat exchange section 220 to the rear and upward.

[0060] In the above embodiment of the utility model, the heat exchanger 20 is multi-stage and surrounded in front of and below the fan 30. The structure of the heat exchanger 20 is the same as that of the traditional wall-mounted air conditioner indoor unit, only the installation posture is reversed. The material can be universal during production without the need for additional design and mold opening, saving production and management costs. Moreover, under this structure and layout of the fan and heat exchanger, after the fan 30 is turned on, the negative pressure of the space below the heat exchanger 20 is the strongest. The embedded air conditioner indoor unit adopts the front airflow form, which leads to insufficient air flow in the lower and rear sections of the heat exchanger 20 (part of the second heat exchange section 220 and the entire third heat exchange section 230), so that the area with the largest negative pressure cannot receive enough air flow, and the heat exchange capacity of the heat exchanger 20 cannot be exerted.

[0061] The embodiment of the utility model, by making the height position (or height coordinate) of the lowest point of the air inlet 11 lower than the lowest point H of the heat exchanger 20 and providing a partition 90, can guide sufficient airflow to the space below and behind the heat exchanger 20, so that the lower and rear sections of the heat exchanger 20 (the second heat exchange section 220 and the third heat exchange section 230) can obtain sufficient airflow, so that each part of the heat exchanger 20 can exchange heat evenly, give full play to the heat exchange capacity of the heat exchanger 20, make the heat exchange efficiency higher, and make the air conditioning energy efficiency higher. It can be seen that the embodiment of the utility model achieves a balance between production cost and air conditioning performance.

[0062] In some embodiments, Figure 3As shown, the distance a between the first heat exchange section 210 and the front plate 130 can be greater than the thickness b of the first heat exchange section 210, that is, a / b>1, preferably a / b>2. Specifically, the value of a / b can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 3, 4, 5, 6, etc. Meeting this size relationship can make the negative pressure between the first heat exchange section 210 and the front plate 130 more suitable for the front airflow structure. In order to make the structure more compact, it is usually not easy to think of designing the distance a so large in the existing air conditioner indoor unit. The embodiment of the utility model overcomes this ideological shackle.

[0063] In some embodiments, Figure 3 As shown, the spacing c between the lowest point H of the heat exchanger 20 and the bottom plate 120 can be greater than twice the average thickness of the heat exchanger 20, preferably greater than 3 times, and the multiples are, for example, 2, 2.2, 2.5, 3, 3.1, 3.5, 4, 5, 6, 7, 8, etc. Meeting this size relationship can ensure that there is enough space below the heat exchanger 20 for the incoming air flow to flow upward. In order to make the structure more compact, it is usually not easy to think of designing the spacing c to be so large in the existing air conditioner indoor unit. The embodiments of the utility model overcome this ideological shackle.

[0064] Furthermore, the ratio of the distance between the lower side T of the air outlet 12 and the upper side E of the air inlet 11 to the vertical dimension of the air outlet 12 can be made less than 0.2, for example, 0.19, 0.18, 0.17, 0.175, 0.16, 0.15, 0.14, 0.13, 0.12, 0.11, 0.1, 0.09, 0.08, 0.07, 0.06, etc. Due to the obstruction of the wind shield 50, the outlet air flow is not easy to mix with the inlet air flow. Therefore, the embodiment of the utility model can more safely design the distance between the air outlet 12 and the air inlet 11 as small as possible, so as to design the air inlet 11 larger, increase the air inlet area as much as possible, and solve the problem of affecting the air conditioning energy efficiency due to insufficient air intake.

[0065] The inventors have found through research that the reason why the existing embedded air-conditioning indoor unit has low air conditioning efficiency is related to the air intake method of the embedded air-conditioning indoor unit. The embedded air-conditioning indoor unit adopts the front airflow form, and the air inlet and the air outlet are arranged adjacent to each other and are very close. This causes a part of the outlet air flow to mix with the inlet air flow and flow back into the casing 10 from the air inlet 11. Taking the cooling mode as an example, the temperature of these outlet air flows is relatively low in itself, and their mixing with the inlet air flow will cause the overall temperature of the inlet air flow to become lower, lowering the heat exchange between the inlet air flow and the heat exchanger 20, causing the heat exchanger 20 to fail to fully exert its heat exchange capacity, reducing its heat exchange efficiency, and further causing the air conditioning efficiency to decrease.

[0066] To this end, in some embodiments, such as Figure 3As shown, the front plate 130 of the housing 10 is in a grille shape, and its grille holes 1301 together constitute the air inlet 11. At least the grille holes 1301 in the lower section of the front plate 130 are gradually inclined upward from the outside of the housing 10 to the inside, so as to facilitate the indoor air to enter the inside of the housing 10 at an oblique upward angle. This allows the airflow to better bypass the water tray 80 and flow backward, and also prevents the outlet airflow (heat exchange airflow) from mixing with the inlet airflow, and prevents the outlet airflow from mixing with the inlet airflow, resulting in reduced air conditioning energy efficiency. It is preferred that all the grille holes 1301 are gradually inclined upward from the outside of the housing 10 to the inside.

[0067] In some embodiments, Figure 2 and Figure 3 As shown, the embedded air conditioner indoor unit further includes a windshield 50 and a guide plate 60. One side of the windshield 50 is rotatably mounted on the housing 10, and its rotation axis x1 extends along the lateral direction of the housing 10 and is adjacent to the upper side K of the air outlet 12. The windshield 50 is used to open or close the air outlet 12. Figure 2 and Figure 3 The closed state and the opened state of the wind deflector 50 are respectively illustrated.

[0068] The guide plate 60 is rotatably mounted on the housing 10 about a transverse axis x2 to guide the air flow direction of the air outlet 12. The rotation axis x2 of the guide plate 60 is adjacent to the lower edge T of the air outlet 12, and the guide plate 60 can be rotated to a wind shielding state extending forward, such as Figure 3 , separate the outlet airflow from the inlet airflow to prevent the outlet airflow from mixing with the inlet airflow.

[0069] In addition, the wind deflector 50 and the guide plate 60 form an "open" mode, and the two can cooperate with each other or independently adjust the air outlet direction and air outlet volume.

[0070] The embedded air conditioner indoor unit is configured such that when the wind shield 50 is in the closed position, the guide plate 60 is rotated to the inside of the housing 10. Specifically, the guide plate 60 can be rotated to a folded position close to the surface of the rear air duct wall 152, such as Figure 2 .

[0071] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

[0072] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A built-in air conditioner indoor unit, characterized in that include: A housing, the front side of which is provided with an air inlet and an air outlet located above the air inlet; A fan, disposed in the housing, for causing air outside the housing to enter the housing through the air inlet to form an inlet airflow; a heat exchanger, arranged in the housing and at least partially below the fan and spaced apart from the bottom plate of the housing, the heat exchanger being used to exchange heat with the inlet airflow to form a heat exchange airflow, and the heat exchange airflow is blown out through the air outlet under the action of the fan; and The water receiving tray is arranged above the bottom plate and below the heat exchanger, and is used for receiving condensed water dripping from the heat exchanger.

2. The embedded air conditioner indoor unit according to claim 1, characterized in that: The lowest point of the air inlet is at a height position lower than the lowest point of the heat exchanger, so as to allow the airflow in the lower section of the air inlet to flow directly backward to the space below the heat exchanger and then to the rear of the heat exchanger.

3. The embedded air conditioner indoor unit according to claim 2, characterized in that Also includes: The partition is arranged in the casing and is used to guide the air flow in the lower section of the air inlet to flow to or remain in the space below the heat exchanger, and then flow to the rear of the heat exchanger.

4. The embedded air conditioner indoor unit according to claim 3, characterized in that: The partition is in the shape of a plate and extends forward from the heat exchanger to the front plate of the casing.

5. The embedded air conditioner indoor unit according to claim 4, characterized in that: The partition extends forward from the lowest point of the heat exchanger to the front plate.

6. The embedded air conditioner indoor unit according to claim 3, characterized in that: A gap is formed between the water receiving tray and the partition to allow the incoming air flow to pass through.

7. The embedded air conditioner indoor unit according to claim 2, characterized in that: The heat exchanger is a multi-stage heat exchanger, which includes a first heat exchange stage, a second heat exchange stage and a third heat exchange stage connected in sequence; The first heat exchange section is erected in front of the fan and is spaced apart from the front plate of the housing, and the distance between the first heat exchange section and the front plate is greater than the thickness of the first heat exchange section; The second heat exchange section extends obliquely backward and downward from the bottom of the first heat exchange section, and a gap is formed between the bottom of the second heat exchange section and the bottom plate; and The third heat exchange section extends obliquely backward and upward from the bottom of the second heat exchange section.

8. The embedded air conditioner indoor unit according to claim 1, characterized in that: The distance between the lowest point of the heat exchanger and the bottom plate is greater than twice the average thickness of the heat exchanger.

9. The embedded air conditioner indoor unit according to claim 1, characterized in that: The front plate of the housing is in a grille shape, and the grille holes together constitute the air inlet; and At least the grille holes of the lower section of the front plate are gradually inclined upward from the outside of the casing to the inside, so as to facilitate indoor air to enter the inside of the casing at an oblique upward angle.

10. The embedded air conditioner indoor unit according to claim 9, characterized in that: The ratio of the distance between the lower edge of the air outlet and the upper edge of the air inlet to the vertical dimension of the air outlet is less than 0.2.

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