Air conditioner indoor unit and air conditioner

Abstract

This invention discloses an indoor air conditioning unit and an air conditioner. The indoor air conditioning unit includes a heat exchange unit and at least two air-expelling units. The heat exchange unit has a heat exchange duct. The at least two air-expelling units are stacked layer by layer with the heat exchange unit in the vertical direction. Each air-expelling unit has an air-expelling duct, a jet duct, and a damper. The air-expelling duct has an air-expelling inlet and an air-expelling outlet communicating with indoor air. The jet duct has a jet outlet and an air-expelling outlet communicating with the heat exchange duct. The jet duct blows air out of the heat exchange duct, creating a negative pressure within the air-expelling duct, causing the air at the air-expelling inlet to flow towards the air-expelling outlet. The damper is located at the jet outlet to adjust the opening of the jet outlet. The dampers of the at least two air-expelling units can be controlled independently. This invention's indoor air conditioning unit can control the continuous airflow at different heights.

Description

Technical Field

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

[0002] With the improvement of living standards, air conditioners have become a major household appliance in people's daily lives. Air conditioners can circulate and exchange heat in indoor air, thereby providing people with a comfortable living environment.

[0003] Existing air conditioners generally use a combination of fans, heat exchangers, and air deflectors to adjust air temperature, direction, and speed to meet the needs of users in different areas. In addition, to ensure the comfort of the airflow from the air conditioner, some products use an air jet multiplication scheme, which sets up a single air outlet to mix hot and cold air in advance, reducing the impact of air discontinuity and improving comfort.

[0004] The airflow delivered by cutting the air with a rotating fan has the problem of discontinuous and unstable airflow, resulting in a poor user experience and discomfort. While the air jet multiplication solution achieves continuous and stable airflow output, existing air conditioners use a single air outlet design and rely on rotation to meet the cooling or heating needs of different areas. This makes it impossible to control the airflow at different heights, thus limiting its effectiveness. Summary of the Invention

[0005] The main objective of this invention is to propose an air conditioner indoor unit that addresses the problem that existing air conditioner indoor units cannot control airflow at different heights.

[0006] To achieve the above objectives, the present invention provides an indoor air conditioning unit, comprising:

[0007] A heat exchange unit having a heat exchange air duct;

[0008] At least two air-exhaust units are arranged in a stacked manner with the heat exchange unit in the vertical direction. Each air-exhaust unit has an air-exhaust duct, a jet duct, and a damper. The air-exhaust duct has an air-exhaust inlet and an air-exhaust outlet, both of which are connected to the indoor air. The jet duct has a flow inlet and a flow outlet, with the flow inlet connected to the heat exchange duct. The jet duct is used to blow air from the heat exchange duct through the flow outlet, creating a negative pressure within the air-exhaust duct so that the air at the air-exhaust inlet flows towards the air-exhaust outlet. The damper is located at the flow outlet or within the jet duct and is used to adjust the opening of the flow outlet. The dampers of the at least two air-exhaust units can be controlled independently.

[0009] In one embodiment, the heat exchange unit is disposed below the at least two air-exhaust units.

[0010] In one embodiment, the jet duct further has a connecting port, and in two adjacent air intake units, the connecting port is connected to the air intake port.

[0011] In one embodiment, the jet duct is arranged in a ring shape, the inlet is located at the lower end of the jet duct, the connecting port is located at the upper end of the jet duct, and the jet outlet is located on one side of the jet duct and is arranged in a ring shape.

[0012] In one embodiment, any two adjacent air intake units are detachably connected.

[0013] In one embodiment, the air-guiding unit includes an air-guiding shell, the air-guiding duct passes through the opposite sides of the air-guiding shell, the jet port is disposed on the inner wall of the air-guiding duct, and the jet port is disposed facing the air-guiding outlet.

[0014] In one embodiment, the inner wall of the air intake unit includes a first intake tube forming part of the jet air duct and a second intake tube forming the air intake outlet. The diameter of the end of the first intake tube near the air intake outlet is smaller than the diameter of the end of the second intake tube away from the air intake outlet. The jet outlet is formed between the end of the first intake tube facing the air intake outlet and the end of the second intake tube away from the air intake outlet.

[0015] In one embodiment, the damper is disposed within the jet duct and is movable in directions toward and away from the jet inlet.

[0016] In one embodiment, the damper is disposed between the first drain tube and the second drain tube.

[0017] In one embodiment, the damper includes a plurality of grid plates arranged circumferentially along the jet orifice, the grid plates being rotatable to adjust the opening of the jet orifice.

[0018] In one embodiment, the rotation range of the grating plate is -90° to +90°.

[0019] In one embodiment, the width of the jet orifice is not less than 1 / 50 of the diameter of the air outlet and not greater than 1 / 2 of the diameter of the air outlet.

[0020] In one embodiment, the diameter of the first guide tube gradually decreases in the direction from the air inlet to the air outlet, and the diameter of the second guide tube gradually increases in the direction from the air inlet to the air outlet.

[0021] In one embodiment, a baffle is provided at the communication port of the uppermost air-guiding unit among the at least two air-guiding units, and the baffle is used to close the communication port.

[0022] In one embodiment, the number of air-expelling units is 2 to 5.

[0023] In one embodiment, in any two adjacent air-guiding units, the width of the jet outlet of one air-guiding unit is not less than the width of the jet outlet of the other air-guiding unit located below it.

[0024] In one embodiment, the width of the jet orifice gradually increases from bottom to top.

[0025] This invention also proposes an air conditioner, comprising an outdoor unit and an indoor unit; the outdoor unit and the indoor unit are connected by a duct, the outdoor unit providing a heat exchange medium to the indoor unit; the indoor unit includes a heat exchange unit and at least two air intake units; the heat exchange unit has a heat exchange duct; the at least two air intake units are stacked layer by layer with the heat exchange unit in the vertical direction, the air intake unit having an air intake duct, a jet duct, and a damper; the air intake duct has an air intake inlet and an air intake outlet communicating with indoor air; the jet duct has a jet outlet and an intake outlet communicating with the heat exchange duct, the jet duct blowing air out of the heat exchange duct to create a negative pressure in the air intake duct, causing the air at the air intake inlet to flow towards the air intake outlet; the damper is located at the jet outlet to adjust the opening of the jet outlet; wherein the dampers of the at least two air intake units can be controlled independently.

[0026] This invention relates to an air conditioner indoor unit that utilizes at least two air-exhaust units and a heat exchange unit arranged in a stacked, vertically aligned manner. Each heat exchange unit contains a heat exchange duct that connects to a jet duct within the air-exhaust unit. The jet duct has a jet nozzle for expelling air from the heat exchange duct. An air-exhaust duct is also provided on the air-exhaust unit. When air is ejected from the jet nozzle, a negative pressure is created within the air-exhaust duct, causing the air in the air-exhaust duct to mix with the air ejected from the jet nozzle, resulting in continuous airflow and improved comfort. Each air-exhaust unit's jet nozzle is also equipped with an independently controllable damper, which controls the opening degree of the jet nozzle to regulate the airflow volume. Ultimately, this allows for the control of the continuous airflow volume of the air conditioner indoor unit at different heights. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the indoor unit of the air conditioner of the present invention;

[0029] Figure 2 for Figure 1 A structural schematic diagram of the indoor unit of a central air conditioner from another perspective;

[0030] Figure 3 for Figure 1 A cross-sectional view of the indoor unit of a central air conditioner;

[0031] Figure 4 for Figure 1 Exploded view of an indoor unit of a central air conditioner;

[0032] Figure 5 for Figure 1 Cross-sectional view of the central exhaust fan unit;

[0033] Figure 6 for Figure 1 Enlarged view of the central grille, showing the grille fully extended;

[0034] Figure 7 This is a schematic diagram of another embodiment of the indoor unit of the air conditioner of the present invention;

[0035] Figure 8 for Figure 7 A cross-sectional view of the central exhaust fan unit, with the baffles in the open position;

[0036] Figure 9 This is a cross-sectional view of another embodiment of the indoor unit of the air conditioner of the present invention.

[0037] Explanation of icon numbers:

[0038]

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0043] Traditional air conditioner indoor units typically use a combination of fans, heat exchangers, and air deflectors to regulate air temperature, direction, and speed to meet the different needs of users in various areas. Each air outlet is equipped with a fan to direct airflow, and each outlet has an opening / closing device to control the airflow volume. While fans rotate and cut the air to deliver airflow, this method suffers from discontinuous and unstable airflow. Furthermore, the air, after heat exchange, comes into direct contact with the human body upon exiting the outlet, resulting in a poor user experience and discomfort.

[0044] To improve the comfort of the airflow from heat exchangers, some air conditioner indoor units employ an air jet multiplier design with a single air outlet to pre-mix hot and cold air and reduce the impact of air discontinuity. However, this single-outlet design, which rotates to meet cooling or heating needs in different areas, cannot achieve airflow control at different heights. When there are work scenarios requiring changes in airflow height, this indoor unit cannot function effectively, limiting its performance.

[0045] This invention proposes an indoor unit for an air conditioner.

[0046] Please see Figures 1 to 4 The indoor unit 100 of the air conditioner includes a heat exchange unit 10 and at least two air intake units 20. The heat exchange unit 10 includes a housing 11, a heat exchanger 12 disposed within the housing 11, and a fan 13. A heat exchange duct 14 is formed within the housing 11, and the heat exchange duct 14 includes an air inlet 111 disposed on the side of the housing 11 and an air outlet 112 disposed on its end face. A heat exchange medium flows within the heat exchanger 12, and the heat exchanger 12 is disposed near the air inlet 111. The exhaust side 131 of the fan 13 is connected to the air outlet 112.

[0047] The at least two air-exhausting units 20 and the heat exchange unit 10 are stacked one layer above each other in the vertical direction. The air-exhausting unit 20 has an air-exhausting duct 23 and a jet duct 22. The air-exhausting duct 23 has an air-exhausting inlet 231 and an air-exhausting outlet 232, both of which are connected to the indoor air. The jet duct 22 has a flow-in port 221 and a jet port 222. The flow-in port 221 is connected to the heat exchange duct 14. The jet duct 22 is used to blow air from the heat exchange duct 14 out through the jet port 222, thereby creating a negative pressure in the air-exhausting duct 23, so that the air in the air-exhausting inlet 231 flows toward the air-exhausting outlet 232.

[0048] In this embodiment, to facilitate the stacking of the air-drawing unit 20 and the heat exchange unit 10, the air-drawing unit 20 is shaped as a cylinder, preferably approximately cylindrical. When the at least two air-drawing units 20 and the heat exchange unit 10 are stacked one layer at a time in the vertical direction, to avoid backflow between the jet outlet 222 and the air inlet 231 of adjacent air-drawing units 20, the opening directions of the jet outlet 222 and the air outlet 232 of the at least two air-drawing units 20 are all uniformly oriented in the same direction. Simultaneously, to prevent backflow between the air inlet 111 on the side of the heat exchange unit 10 and the jet outlet 222 on the adjacent air-drawing unit 20, causing heated or cooled air to re-enter the heat exchange duct 14 and reduce the working efficiency of the indoor unit 100, the air inlet 111 is positioned on the housing 11 to avoid the area within the vertical direction where the jet outlet 222 is located. To enhance the pressure difference between the inside and outside of the housing 11 when the heat exchange unit 10 draws air, thus improving the air intake efficiency, the air inlet 111 is configured as an inlet grille, which also blocks some debris from entering the heat exchange unit 10. The main function of the fan 13 is to draw indoor air into the heat exchange duct 14 and then discharge the heat-exchanged air into the jet duct 22, allowing the heat-exchanged air to circulate into the at least two exhaust units 20. The specific structure of the fan 13 can be varied, such as a centrifugal fan, a mixed-flow fan, an axial flow fan, a cross-flow fan, or a counter-rotating fan 13.

[0049] Please see Figures 3 to 5 In this embodiment, the air-guiding unit 20 further includes an air-guiding shell 21, and an air-guiding duct 23 passes through the opposite sides of the air-guiding shell 21. The jet port 222 is disposed on the inner wall of the air-guiding duct 23 and faces the air-guiding outlet 232. The jet duct 22 is arranged in a ring shape, and the jet port 222 is disposed on one side of the jet duct 22 and is also arranged in a ring shape. The inner wall of the air intake unit 20 includes a first intake cylinder 24 (which also forms an air intake inlet 231) that partially forms the jet duct 22 and a second intake cylinder 25 that forms the air intake outlet 232. The diameter of the first intake cylinder 24 near the air intake outlet 232 is smaller than the diameter of the second intake cylinder 25 away from the air intake outlet 232. The jet outlet 222 is formed between the end of the first intake cylinder 24 facing the air intake outlet 232 and the end of the second intake cylinder 25 away from the air intake outlet 232. The diameter of the first intake cylinder 24 gradually decreases in the direction from the air intake inlet 231 to the air intake outlet 232, and the diameter of the second intake cylinder 25 gradually increases in the direction from the air intake inlet 231 to the air intake outlet 232.

[0050] When the indoor unit 100 of the air conditioner is running, indoor air flows into the heat exchange duct 14 through the air inlet 111. After heat exchange with the heat exchange medium in the heat exchanger 12, the temperature rises or falls. The air is then drawn in by the fan 13 and discharged from the air outlet 112. The air discharged from the heat exchange duct 14 flows into the jet duct 22 through the inlet 221. When passing through the jet outlet 222, the flow area suddenly decreases. According to the continuity equation derived from the law of conservation of mass, when the fluid flows continuously, a smaller cross-section will increase the flow velocity. Therefore, the flow velocity of the air passing through the jet outlet 222 increases and it is ejected from the jet outlet 222.

[0051] Because the air velocity flowing out of the jet port 222 is relatively high, the air pressure in the direction of the airflow from the jet port 222 is relatively low. As a result, the air near the jet port 222 will converge in the direction of the airflow from the jet port 222. Therefore, when the air flows out of the jet port 222, it will form a flowing air at the exhaust outlet. Thus, the air velocity at the exhaust outlet is relatively high and the regional pressure is relatively low. The airflow in the exhaust duct 23 will converge in the direction of the airflow from the jet port 222, and a negative pressure will be formed in the exhaust duct 23 (there is a pressure difference between the exhaust inlet and the exhaust outlet). External air will continuously flow into the exhaust duct 23 from the exhaust inlet 231 and then flow out from the exhaust outlet 232, and converge with the airflow from the jet port 222, thereby greatly increasing the air volume.

[0052] The diameter of the first air intake tube 24 gradually decreases in the direction from the air intake 231 to the air outlet 232, so that external air can easily enter the air intake duct 23 through the air intake 231.

[0053] The diameter of the second guide tube 25 gradually increases in the direction from the air inlet 231 to the air outlet 232. This design is primarily to ensure that after external air enters the air duct 23, it mainly gathers within the second guide tube 25, where airflow is relatively fast. Setting the second guide tube 25 as an flared opening facilitates the smooth outflow of the gathered air. The mixed airflow is then discharged into the room, improving indoor comfort. The amount of air discharged into the room is significantly greater than the amount of air exiting from the jet outlet 222 due to the mixing of air from the air duct 23, achieving an air multiplication effect. Furthermore, the diameter of the first guide tube 24 gradually decreases in the direction from the air inlet 231 to the air outlet 232, while the diameter of the second guide tube 25 gradually increases in the direction from the air inlet 231 to the air outlet 232. This means the air duct 23 expands outwards from the center, increasing the amount of indoor air that can be mixed. At this time, the heat-exchanged air discharged from the jet port 222 is continuous, and before it is discharged from the exhaust port 232, it has already mixed with the indoor air in the exhaust duct 23. When it is discharged into the room and comes into contact with the human body, it will not make the human body feel uncomfortable, thus improving the comfort of the heat-exchanged air.

[0054] Please see Figure 3 and Figure 4 The at least two air-expelling units 20 and the heat exchange unit 10 are arranged in a stacked manner in the vertical direction. The heat exchange unit 10 can be located above or between the at least two air-expelling units 20. Considering that the fan 13 inside the heat exchange unit 10 will vibrate when it is running, and that the heat exchange unit 10 also includes a heat exchanger 12, which is heavier than the air-expelling units 20, placing the heat exchange unit 10 above or between the at least two air-expelling units 20 can easily cause instability. Therefore, in one embodiment, the heat exchange unit 10 is located below the at least two air-expelling units 20, making the overall installation of the air conditioner indoor unit 100 more stable.

[0055] Based on the previous embodiment, in order to allow air in the heat exchange duct 14 to enter each of the stacked air intake units 20, the jet duct 22 also has a connecting port 223. The air intake port 221 is located at the lower end of the jet duct 22, and the connecting port 223 is located at the upper end of the jet duct 22. In two adjacent air intake units 20, the connecting port 223 communicates with the air intake port 221. A baffle 28 is provided at the connecting port 223 of the uppermost air intake unit 20 to close the connecting port 223. When multiple air-guiding units 20 are stacked on the heat exchange unit 10, the air inlet 221 of the lowest air-guiding unit 20 is connected to the exhaust port of the heat exchange unit 10, the connection ports of two adjacent air-guiding units 20 are connected to the air inlet 221, and the connection port of the highest air-guiding unit 20 is sealed by the single plate. A complete jet air duct 22 is formed within the multiple air-guiding units 20, so that the heat-exchanged air can circulate into each air-guiding unit 20. The multiple air-guiding units 20 can be designed as a whole or as detachable connections. There are many specific connection methods, such as snap-fit ​​connections, threaded connections, or magnetic connections. The number of air-guiding units 20 can be increased according to the needs of the application scenario to meet the air outlet requirements at different heights.

[0056] Furthermore, in the previous embodiment, the heat exchange unit 10 is placed below the at least two air-drawing units 20. If the number of air-drawing units 20 is too large, the stacking of the air-drawing units 20 too high will cause the center of gravity of the air conditioner indoor unit 100 to become unstable, increasing the possibility of the air conditioner indoor unit 100 tipping over. At the same time, if the air-drawing units 20 are stacked too high, the fan 13 cannot provide sufficient power to allow the heat-exchanged air to reach the air-drawing units 20 located above. Therefore, to control the reasonable height of the air conditioner indoor unit, it is preferable to set the number of air-drawing units 20 to 2 to 5.

[0057] In one embodiment, considering that if the width of the jet outlet 222 is too large, the velocity of the air flowing out of the jet outlet 222 after heat exchange cannot be significantly increased, thus failing to create a large pressure difference within the air duct 23. Consequently, the amount of air discharged from the air outlet 232 is relatively small, reducing the effectiveness of the indoor unit 100. If the width of the jet outlet 222 is too small, too little air flows out of the jet outlet 222, and after mixing with the air in the air duct 23, the proportion of air after heat exchange is too small, failing to improve indoor air quality. Therefore, the preferred width of the jet outlet 222 is not less than 1 / 50 and not more than 1 / 2 of the diameter of the air outlet 232. For example, the width of the jet port 222 is preferably not less than 1 / 30, 1 / 25, 1 / 20, 1 / 15, 1 / 10, 1 / 8, 1 / 5, or 1 / 3 of the diameter of the air outlet 232.

[0058] Please see Figure 9 Considering that if the width of the jet outlet 222 of each of the air-guiding units 20 is the same, a portion of the air in the jet duct 22 will be discharged from the jet outlet 222 each time it flows through an air-guiding unit 20, causing the air in the jet duct 22 to gradually decrease from bottom to top. This may eventually lead to a lack of air in the jet duct 22 of the upper air-guiding unit 20, resulting in no airflow from the upper air-guiding unit 20 and affecting the airflow effect and user experience of the indoor unit of the air conditioner. Therefore, in one embodiment, in any two adjacent air-guiding units 20, the width of the jet outlet 222 of one air-guiding unit 20 is not less than the width of the jet outlet 222 of the other air-guiding unit 20 located below it. The widths of the jet outlets 222 are designated A, B, C, and D from bottom to top, with the relationship A ≤ B ≤ C ≤ D. Here, when the number of air intake units 20 is small, such as less than 5, even if A, B, C, and D are equal, the airflow volume emitted from each jet port 222 will have some difference, but overall it will not have a significant impact. Furthermore, if the width of each jet port 222 is small, even if A, B, C, and D are equal, their airflow volume will be roughly the same. Of course, to improve the user experience, the airflow volume cannot be too small, meaning the width of the jet ports cannot be too small. This implies that if A, B, C, and D are equal, the airflow volume from the jet ports 222 of the lower air intake unit 20 will inevitably be larger, while the airflow volume from the jet ports 222 of the upper air intake unit 20 will be smaller.

[0059] Therefore, in another preferred embodiment, the width of the jet outlet 222 is set to gradually increase from bottom to top. The width of the jet outlet 222 of the lower air-guiding unit 20 is smaller than that of the jet outlet 222 of the upper air-guiding unit 20, and under normal circumstances, less air can be discharged. However, the air volume in the jet duct 22 within the lower air-guiding unit 20 is relatively sufficient, and the pressure is relatively greater than that in the jet duct 22 within the upper air-guiding unit 20, which further promotes air discharge. The width of the jet outlet 222 of the upper air-guiding unit 20 is relatively large, but the pressure in the jet duct 22 within the upper air-guiding unit 20 is relatively small. By controlling the width of the jet outlet 222, the pressure difference of the jet duct 22 in the air-guiding unit 20 in the vertical direction is balanced, so that the amount of air flowing out of the jet outlet 222 of each air-guiding unit 20 is nearly consistent, making the air output of each air-guiding unit 20 more uniform.

[0060] Unlike the previous embodiment, to address the issue of the upper-positioned air intake unit 20 failing to expel air, in one embodiment, in addition to the fan 13 located within the heat exchange unit 10 for air intake and exhaust, other fans (not shown) are also installed within the jet duct 22 formed between the multiple air intake units 20. These fans allow the air within the jet duct 22 to reach a greater distance, preventing the air from failing to reach the upper-positioned air intake unit 20. In this case, simply increasing the power of the fan 13 within the heat exchange unit 10 and increasing the air intake within the heat exchange duct 14 ensures that each air intake unit 20 can eject sufficient air. The fans within the jet duct 22 primarily increase the distance the heat-exchanged air can travel, without involving changes in airflow direction; axial flow fans are generally used, making installation simple.

[0061] The width of the jet outlet 222 of the air-guiding unit 20 at different heights is different. The air outlet requirements of the indoor unit at different heights can be met by reducing or increasing the number of air-guiding units 20. However, if the width of the jet outlet 222 of each air-guiding unit 20 needs to be controlled and the width of the jet outlet 222 is set to gradually increase from bottom to top, it will increase the manufacturing and installation difficulty of the indoor unit. While adding other fans in the jet duct 22 formed between multiple air-guiding units 20 solves the problem of low or no airflow in the upper air-guiding units 20, it also increases manufacturing costs. In addition, adding fans also means increasing noise, which affects the user experience of the indoor unit 100.

[0062] Therefore, in one embodiment, a damper is also provided in the air intake unit, and the damper is located at the jet inlet 222 or in the jet duct 22.

[0063] Specifically, a damper is provided between the first guide tube 24 and the second guide tube 25, and the damper is used to adjust the opening of the jet port 222; wherein, the dampers of the at least two air-guiding units 20 can be controlled independently. The opening of the jet port 222 determines the velocity of the air discharged from the jet duct 22, which in turn determines the pressure difference that can be formed in the air-guiding duct 23, and ultimately determines the amount of mixed air discharged from the air-guiding outlet 232 and the distance that the discharged mixed air can be ejected.

[0064] Optionally, since the airflow is already controlled by the damper at the jet outlet 222, the jet outlets 222 of the air-guiding units 20 at different heights can be set to have the same width, or the width of the jet outlets 222 can be set to gradually increase from bottom to top. Meanwhile, since the damper can individually control the opening of the jet outlet 222 of each air-guiding unit 20, closing the damper of the upper air-guiding unit 20 has a similar effect to disassembling the air-guiding unit 20. Therefore, the air-guiding unit 20 can be set as a single unit, or it can be set as a detachable connection.

[0065] Please see Figure 7 and Figure 8 There are various forms of dampers. In one embodiment, the damper includes a baffle 27, which is movable along the axial direction of the first guide tube 24 (moving towards and away from the jet port 222) and located within the jet duct 22. The baffle 27 can move towards or away from the jet port 222, and the baffles 27 of the at least two guide units 20 can be independently controlled to move. When the baffle 27 moves towards the jet port 222, the area through which air in the jet duct 22 can pass through the jet port 222 decreases, i.e., the opening of the jet port 222 decreases; when the baffle 27 moves away from the jet port 222, the area through which air in the jet duct 22 can pass through the jet port 222 increases, i.e., the opening of the jet port 222 increases. By individually controlling the moving direction and moving distance of the baffle 27 in each of the air-guiding units 20, the air volume of each air-guiding unit 20 can be individually controlled, so that the air conditioner indoor unit 100 can adjust the continuous air volume at different height positions to meet different working scenarios.

[0066] Please see Figure 4 and Figure 6In addition to the baffle 27, the damper also includes a plurality of grid plates 26 arranged circumferentially along the jet outlet 222. The grid plates 26 can be fixed in place, with their surfaces parallel to the central axis of the jet outlet 222. The grid plates 26 divert the airflow from the jet outlet 222, reducing the adhesion resistance between air particles. In another preferred embodiment, the damper may not have the baffle 27; instead, the opening of the jet outlet 222 is adjusted by the grid plates 26. The opening of the jet outlet 222 is adjusted by the rotation of the grid plates 26. Specifically, the grid plates 26 can rotate around their own axis by an angle of -90° to +90°. When the surface of the grille plate 26 is parallel to the central axis of the jet outlet 222, the grille plate 26 is fully open, and the opening of the jet outlet 222 reaches its maximum. After controlling the grille plate 26 to rotate clockwise or counterclockwise by 45°, the angle between the surface of the grille plate 26 and the central axis of the jet outlet 222 is 45°, and the opening of the jet outlet 222 is half of its maximum opening. After controlling the grille plate 26 to rotate clockwise or counterclockwise again by 45°, the angle between the surface of the grille plate 26 and the central axis of the jet outlet 222 is 90°, the grille plate 26 is fully closed, the jet outlet 222 is sealed, and the opening reaches its minimum. By individually controlling the rotation angle of the grille plate 26 in each air-inducing unit 20, the air volume of each air-inducing unit 20 can be individually controlled, allowing the indoor unit 100 of the air conditioner to adjust the continuous air volume at different height positions to meet different working scenarios. For example, the airflow of each of the air-expelling units can be set to four different levels; in the closed position, the angle between the surface of the grille plate 26 and the central axis of the jet port 222 is 90°, the grille plate 26 is completely closed, and no airflow is emitted from the corresponding jet port; in level 1, the angle between the surface of the grille plate 26 and the central axis of the jet port 222 is 60°; in level 2, the angle between the surface of the grille plate 26 and the central axis of the jet port 222 is 30°; in level 3, the surface of the grille plate 26 is parallel to the central axis of the jet port 222, the grille plate 26 is fully open, and the opening of the jet port 222 reaches its maximum.

[0067] This invention also proposes an air conditioner comprising an outdoor unit and an indoor unit. The specific structure of the indoor unit is as described in the above embodiments. Since this air conditioner adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The outdoor unit and the indoor unit are connected by a conduit. The outdoor unit provides a heat exchange medium to the indoor unit, which exchanges heat with the indoor air, thereby increasing or decreasing the temperature of the indoor air entering the indoor unit.

[0068] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: A heat exchange unit having a heat exchange air duct; At least two air-exhaust units are arranged in a stacked manner with the heat exchange unit in the vertical direction. Each air-exhaust unit has an air-exhaust duct, a jet duct, and a damper. The air-exhaust duct has an air-exhaust inlet and an air-exhaust outlet, both of which are connected to the indoor air. The jet duct has a flow-in port and a flow-out port, with the flow-in port connected to the heat exchange duct. The jet duct is used to blow air from the heat exchange duct through the flow-out port, creating a negative pressure within the air-exhaust duct so that the air at the air-exhaust inlet is directed towards the air-exhaust outlet. The jet flow is directed to the nozzle; the damper is located at the jet nozzle or within the jet duct to adjust the opening of the jet nozzle; wherein the dampers of the at least two induced draft units can be controlled independently; the heat exchange unit is located below the at least two induced draft units; the jet duct also has a connecting port, and in two adjacent induced draft units, the connecting port is connected to the jet nozzle; in any two adjacent induced draft units, the width of the jet nozzle of one induced draft unit is not less than the width of the jet nozzle of the other induced draft unit located below it; the width of the jet nozzle gradually increases from bottom to top.

2. The air conditioner indoor unit as described in claim 1, characterized in that, The jet duct is arranged in a ring shape, the inlet is located at the lower end of the jet duct, the connecting port is located at the upper end of the jet duct, and the jet outlet is located on one side of the jet duct, and is arranged in a ring shape.

3. The air conditioner indoor unit as described in claim 2, characterized in that, Any two adjacent air intake units can be detachably connected.

4. The air conditioner indoor unit as described in claim 2, characterized in that, The air-guiding unit includes an air-guiding shell, the air-guiding duct passes through the opposite sides of the air-guiding shell, the jet port is disposed on the inner wall of the air-guiding duct, and the jet port is disposed facing the air-guiding outlet.

5. The air conditioner indoor unit as described in claim 4, characterized in that, The inner wall of the air intake unit includes a first intake tube forming part of the jet air duct and a second intake tube forming the air intake outlet. The diameter of the end of the first intake tube near the air intake outlet is smaller than the diameter of the end of the second intake tube away from the air intake outlet. The jet outlet is formed between the end of the first intake tube facing the air intake outlet and the end of the second intake tube away from the air intake outlet.

6. The air conditioner indoor unit as described in claim 5, characterized in that, The damper is disposed within the jet duct and is movable in the direction of approaching and moving away from the jet inlet.

7. The air conditioner indoor unit as described in claim 5, characterized in that, The damper is located between the first diversion tube and the second diversion tube.

8. The air conditioner indoor unit as described in claim 7, characterized in that, The damper includes a plurality of grid plates arranged circumferentially along the jet orifice, and the grid plates are rotatable to adjust the opening of the jet orifice.

9. The air conditioner indoor unit as described in claim 8, characterized in that, The rotation range of the grating plate is -90° to +90°.

10. The air conditioner indoor unit as described in claim 5, characterized in that, The width of the jet nozzle is not less than 1 / 50 of the diameter of the air outlet and not greater than 1 / 2 of the diameter of the air outlet.

11. The air conditioner indoor unit as described in claim 5, characterized in that, The diameter of the first guide tube gradually decreases in the direction from the air inlet to the air outlet, and the diameter of the second guide tube gradually increases in the direction from the air inlet to the air outlet.

12. The air conditioner indoor unit as described in claim 2, characterized in that, In the at least two air-guiding units, a baffle is provided at the connection port of the uppermost air-guiding unit, and the baffle is used to close the connection port.

13. The air conditioner indoor unit as described in claim 1, characterized in that, The number of the air-expelling units is 2 to 5.

14. An air conditioner, characterized in that, It includes an outdoor unit and an indoor air conditioning unit as described in any one of claims 1 to 13, wherein the outdoor unit is connected to the indoor air conditioning unit.

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