Air conditioner indoor unit and air conditioner

Abstract

The application discloses an air conditioner indoor unit and an air conditioner, and relates to the technical field of air conditioners. The air conditioner indoor unit comprises a shell, a fan, a heat exchanger assembly and a flow distribution assembly. The shell is internally formed with a heat exchange air duct, which is provided with an air inlet and an air outlet. The fan and the heat exchanger assembly are arranged in the heat exchange air duct. The flow distribution assembly is arranged at the air outlet, and the flow distribution assembly separates the air outlet into an upper air outlet and a lower air outlet. The heat exchanger assembly comprises a front heat exchanger and a rear heat exchanger, and the temperatures of the front heat exchanger and the rear heat exchanger can be independently adjusted. The technical scheme can solve the problem that the existing air conditioner cannot simultaneously satisfy the comfort of direct blowing and the rapid indoor cooling.

Description

Technical Field

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

[0002] An air conditioner is an electrical device that regulates and maintains the indoor temperature to the user's desired level. It mainly consists of a refrigeration cycle system and an air circulation system. The refrigerant circulating within its refrigeration system exchanges heat with the indoor air to cool or heat the room, providing people with a fresh and comfortable indoor air environment.

[0003] Existing air conditioner indoor units have air guide plates installed inside the air outlet, and the air guide plates are located at the end of the air outlet, far away from the cross-flow fan blades. In cooling mode, the evaporator temperature is low, resulting in excessively low air outlet temperature. Cold air blows into people in cooling mode, causing discomfort to users. In order to prevent cold air from blowing into people, the air guide plate is usually rotated to a horizontal position or a micro-perforated air guide plate is used to cover the air outlet.

[0004] Using the anti-direct-blow mode, people will not feel uncomfortable from the direct blowing of cold air, but the lack of airflow can make people feel stuffy and unable to provide a natural breeze. However, if the blowing temperature is increased, while the comfort of the blowing air is improved, the cooling capacity will be insufficient, and the cooling time will be increased, which is not conducive to rapid indoor cooling. In other words, existing air conditioners have the problem of not being able to satisfy both the comfort of direct blowing air and rapid indoor cooling. Summary of the Invention

[0005] The main objective of this invention is to provide an indoor air conditioning unit and an air conditioner that addresses the problem that existing air conditioners cannot simultaneously satisfy the comfort of direct airflow and rapid indoor cooling.

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

[0007] A housing, wherein a heat exchange air duct is formed inside the housing, and the heat exchange air duct has an air inlet and an air outlet;

[0008] The fan is located inside the heat exchange duct;

[0009] The heat exchanger assembly is disposed within the heat exchange duct; and

[0010] A diversion component is provided at the air outlet, which divides the air outlet into an upper air outlet and a lower air outlet.

[0011] The heat exchanger assembly includes a front heat exchanger and a rear heat exchanger, the temperatures of which can be adjusted independently.

[0012] In one embodiment, the housing includes a volute and a volute tongue, and the flow splitting assembly includes a first flow splitting plate and a second flow splitting plate connected at an angle, the second flow splitting plate extending toward the interior of the heat exchange duct, the rear end of the first flow splitting plate being connected to the front end of the second flow splitting plate, and the first flow splitting plate extending toward the exterior of the air outlet.

[0013] The first flow divider is closer to the volute tongue relative to the volute housing; or

[0014] The first diverter plate is closer to the volute shell than the volute tongue.

[0015] In one embodiment, the flow diversion assembly further includes a third flow diversion plate, the rear end of which is connected to the front end of the second flow diversion plate. The third flow diversion plate extends toward the outside of the air outlet. One of the first flow diversion plate and the second flow diversion plate is closer to the volute tongue relative to the volute shell, and the other is closer to the volute shell relative to the volute tongue.

[0016] In one embodiment, one of the first and third diverter plates, which is closer to the volute tongue relative to the volute shell, is inclined upwards, while the other is inclined downwards.

[0017] In one embodiment, the diversion component extends linearly from the interior of the heat exchange duct toward the exterior of the air outlet.

[0018] In one embodiment, the housing includes a volute and a volute tongue, and the flow diversion assembly includes an upper flow diversion plate and a lower flow diversion plate connected at an angle. The rear end of the upper flow diversion plate is connected to the rear end of the lower flow diversion plate. Both the upper and lower flow diversion plates extend toward the outside of the air outlet. The upper flow diversion plate is closer to the volute tongue than the volute, and the lower flow diversion plate is closer to the volute than the volute tongue.

[0019] In one embodiment, the outer circumferential radius of the fan ranges from 85 to 132 mm, and the ratio of the minimum distance between the rear end of the diversion component and the fan to the outer circumferential radius of the fan ranges from 0.1 to 1.2.

[0020] In one embodiment, the rear end of the diversion component extends to the rear side of the vertical line of the center of the fan, and the vertical deflection angle of the line connecting the upper vertex of the rear end of the diversion component and the center of rotation of the fan is in the range of 0°-44°.

[0021] In one embodiment, the rear end of the diversion component extends to the front side of the vertical line of the center of the fan, and the vertical deflection angle of the line connecting the upper vertex of the rear end of the diversion component and the center of rotation of the fan is in the range of 0°-24°.

[0022] In one embodiment, the angle between the top surface of the rear end of the diversion component and the horizontal plane ranges from 0° to 90°.

[0023] In one embodiment, the ratio of the distance between the top rear surface of the diversion component and the upper wall of the heat exchange duct to the distance between the bottom rear surface of the diversion component and the lower wall of the heat exchange duct is in the range of 0.5-3.

[0024] In one embodiment, the first and third diverter plates, the one closer to the volute tongue relative to the volute shell, are inclined upwards at an angle ranging from 0° to 15°.

[0025] In one embodiment, the first and third diverter plates, the one closer to the volute relative to the volute tongue, is inclined downwards at an angle ranging from 45° to 90°.

[0026] In one embodiment, the included angle formed by the first and third splitters is greater than 50°.

[0027] In one embodiment, the ratio of the height of the upper air outlet to the height of the lower air outlet is in the range of 0.8-1.

[0028] In one embodiment, the evaporation temperature of the front heat exchanger is not higher than the evaporation temperature of the rear heat exchanger.

[0029] The present invention also proposes an air conditioner, which includes an outdoor unit and an indoor unit as described above. The outdoor unit includes a compressor, a third heat exchanger, and an electronic expansion valve. The compressor, the third heat exchanger, the electronic expansion valve, and the heat exchanger assembly are sequentially connected to form a heat exchange circuit. The electronic expansion valve includes a first electronic expansion valve and a second electronic expansion valve that can be controlled independently. The third heat exchanger is connected to the front heat exchanger and the rear heat exchanger through the first electronic expansion valve and the second electronic expansion valve, respectively.

[0030] In one embodiment, the heat exchange circuit further includes a four-way valve that connects the outlet of the compressor, the inlet of the compressor, the outlet of the heat exchanger assembly, and the inlet of the third heat exchanger.

[0031] The technical solution of this invention sets up a front heat exchanger and a rear heat exchanger that can independently adjust the evaporation temperature, and divides the air outlet into an upper air outlet and a lower air outlet through a flow splitting component. Finally, the cold air after heat exchange by the front heat exchanger is discharged from the upper air outlet through the fan, and the hot air after heat exchange by the rear heat exchanger is discharged from the lower air outlet. At the same time, the cold air can quickly cool the room, and the hot air can directly blow to bring comfort to the human body. Attached Figure Description

[0032] 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.

[0033] 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;

[0034] Figure 2 This is a schematic diagram of another embodiment of the indoor unit of the air conditioner of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of another embodiment of the indoor unit of the air conditioner of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of another embodiment of the indoor unit of the air conditioner of the present invention;

[0037] Figure 5 This is a schematic diagram of another embodiment of the indoor unit of the air conditioner of the present invention;

[0038] Figure 6 for Figure 1 A magnified view of part A in the indoor unit of the air conditioner.

[0039] Explanation of icon numbers:

[0040] label name label name 10 air conditioner indoor unit 100 case 110 heat exchange air duct 111 air inlet 112 air vent 112a Top air vent 112b Lower air outlet 120 Snail shell 130 Cochlear tongue 200 heat exchanger assembly 210 front heat exchanger 220 Rear heat exchanger 300 Fan 310 Rotation Center 400 shunt component 410 First diverter plate 420 Second diverter plate 430 Third Diverter 440 Upper splitter 450 Lower splitter

[0041] 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

[0042] 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.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0044] Furthermore, the use of terms such as "first" and "second" in this invention is 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 that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0045] Existing air conditioner indoor units have air guide vanes inside the air outlet, located at the far end of the outlet and far from the cross-flow fan blades. In cooling mode, the evaporator temperature is low, resulting in excessively low outlet air temperature. This causes cold air to blow directly into people, causing discomfort. To prevent this, the air guide vane is usually rotated to a horizontal position or a perforated vane is used to cover the air outlet. However, without airflow directly onto the body, people feel stuffy and lack a natural breeze. Increasing the airflow temperature improves comfort but reduces cooling capacity, increasing the time it takes to cool down and hindering rapid indoor temperature reduction. In short, existing air conditioners cannot simultaneously provide both the comfort of direct airflow and rapid indoor cooling.

[0046] To address the above problems, this invention proposes an indoor air conditioning unit.

[0047] Please see Figure 1 In this embodiment, the indoor unit 10 of the air conditioner includes a housing 100, a fan 300, a heat exchanger assembly 200, and a flow distribution assembly 400. The housing 100 contains a heat exchange duct 110 with an air inlet 111 and an air outlet 112. The fan 300 is disposed within the heat exchange duct 110. The flow distribution assembly 400 is located at the air outlet 112, dividing the air outlet 112 into an upper air outlet 112a and a lower air outlet 112b. The heat exchanger assembly 200 is disposed within the heat exchange duct 110 and includes a front heat exchanger 210 and a rear heat exchanger 220, the temperatures of which are independently adjustable. The housing 100 includes a volute 120 and a volute tongue 130, and the heat exchange duct 110 is located between the volute 120 and the volute tongue 130.

[0048] In cooling mode, the front heat exchanger 210 and rear heat exchanger 220 act as evaporators, exchanging heat with the indoor air entering the heat exchange duct 110 to lower the indoor air temperature. When the indoor unit 10 of the air conditioner is running, the fan 300 starts, drawing air into the heat exchange duct 110 through the air inlet 111. The heat exchanger assembly 200 operates, exchanging heat with the flowing air, lowering the air temperature. The cooled air is then discharged into the room through the air outlet 112, mixing with the indoor air to ultimately lower the indoor temperature. Since the diversion component 400 divides the air outlet 112 into an upper air outlet 112a and a lower air outlet 112b, the heat exchanger assembly 200 includes a front heat exchanger 210 and a rear heat exchanger 220. The air flowing through the front heat exchanger 210 is mainly discharged into the room through the upper air outlet 112a, and the air flowing through the rear heat exchanger 220 is mainly discharged into the room through the lower air outlet 112b.

[0049] The front heat exchanger 210 and the rear heat exchanger 220 have independent temperatures, meaning that when they function as evaporators, they have independent evaporation temperatures and can cool the flowing air separately. By adjusting the evaporation temperature of the front heat exchanger 210 to be different from that of the rear heat exchanger 220, the temperature of the air discharged from the upper air outlet 112a can be different from the temperature of the air discharged from the lower air outlet 112b.

[0050] Utilizing the above principle, the indoor unit 10 of the air conditioner is equipped with an anti-cold air direct blowing mode. In this mode, the evaporation temperature of the rear heat exchanger 220 is set higher than that of the front heat exchanger 210, meaning the air temperature flowing through the rear heat exchanger 220 is higher than that flowing through the front heat exchanger 210. The air flowing through the front heat exchanger 210 is mainly discharged through the upper air outlet 112a, flowing upwards into the room, and is at a lower temperature, used to reduce or maintain the indoor temperature. The air flowing through the rear heat exchanger 220 is mainly discharged through the lower air outlet 112b, flowing downwards into the room, and is at a higher temperature. When a user is indoors, this airflow can directly blow onto the body, providing a natural and comfortable blowing experience, unlike direct cold air blowing, which causes discomfort. In other words, through the heat exchanger assembly 200 with independent evaporation temperatures and the separated air outlets 112, both cold air cooling of the room and warm air blowing directly onto the body provide a comfortable blowing experience.

[0051] When further rapid cooling of the indoor environment is required, the indoor unit 10 of the air conditioner is equipped with a rapid cooling mode. In this mode, the evaporation temperatures of both the rear heat exchanger 220 and the front heat exchanger 210 are lowered, causing both the lower air outlet 112b and the upper air outlet 112a to expel cold air. Users can temporarily avoid standing near the lower air outlet 112b, as the cold air rapidly fills the indoor space, causing the indoor temperature to drop quickly. Once the indoor temperature has reached the user-set temperature, the evaporation temperature of the rear heat exchanger 220 is raised, causing the lower air outlet 112b to expel warm air that provides comfort to the human body, blowing directly on them.

[0052] Considering that air density increases with temperature, meaning that when indoor air temperature is uneven, cooler air will flow downwards while warmer air will flow upwards, it is preferable that the evaporation temperature of the front heat exchanger 210 should not be higher than the evaporation temperature of the rear heat exchanger 220, that is, the temperature of the air discharged from the upper air outlet 112a should not be higher than the temperature of the air discharged from the lower air outlet 112b. When the temperature of the air discharged from the upper air outlet 112a is lower than the temperature of the air discharged from the lower air outlet 112b, since the upper air outlet 112a is located above the lower air outlet 112b, the air discharged from the upper air outlet 112a has an initial velocity of flowing upwards into the room under the action of the fan 300. After flowing upwards for a certain distance, because its temperature is lower than the temperature of the indoor air, the cold air flows downwards into the room under the action of gravity. Conversely, the air discharged from the lower air outlet 112b has an initial velocity of flowing downwards into the room under the action of the fan 300. After flowing downwards for a certain distance, because its temperature is higher than the temperature of the air above it, the hot air flows upwards into the room. This pattern of cold air flowing upwards and then downwards into the room, and hot air flowing downwards and then upwards into the room, enhances the mixing of cold and hot air with the indoor air, allowing the indoor temperature to reach the user-set temperature more quickly.

[0053] The cooling efficiency and airflow feel of the indoor unit 10 of the air conditioner are affected not only by the evaporation temperatures of the front heat exchanger 210 and the rear heat exchanger 220, but also by the configuration of the diversion component 400. The rationality of the configuration of the diversion component 400 will directly affect the air volume, air temperature and air velocity of the upper air outlet 112a and the lower air outlet 112b respectively.

[0054] Please see Figure 2 and Figure 3In one embodiment, the flow diversion assembly 400 includes a first flow diversion plate 410 and a second flow diversion plate 420 connected at an angle. The second flow diversion plate 420 extends toward the interior of the heat exchange duct 110, and the rear end of the first flow diversion plate 410 is connected to the front end of the second flow diversion plate 420. The first flow diversion plate 410 extends toward the exterior of the air outlet 112. Specifically, the first flow diversion plate 410 is closer to the volute tongue 130 relative to the volute 120, such that the area of ​​the upper air outlet 112a is smaller than the area of ​​the lower air outlet 112b; or the first flow diversion plate 410 is closer to the volute 120 relative to the volute tongue 130, such that the area of ​​the lower air outlet is smaller than the area of ​​the upper air outlet 112a.

[0055] When the area of ​​the lower air outlet is smaller than the area of ​​the upper air outlet 112a, it can be concluded that, given a similar amount of air passing through both sides of the second diverter plate 420, the air velocity discharged from the lower air outlet 112b is greater than the air velocity discharged from the upper air outlet 112a. That is, the velocity of hot air is higher, and the velocity of cold air is lower. A lower initial velocity of cold air results in a smaller maximum reach when discharged, preventing it from quickly filling the indoor space, thus reducing the rate at which the indoor air conditioner lowers the indoor temperature. Conversely, a higher initial velocity of hot air, when blowing directly on a person, can cause discomfort and reduce the user's airflow experience.

[0056] When the area of ​​the upper air outlet 112a is smaller than the area of ​​the lower air outlet, it can be concluded that, given a similar amount of air passing through both sides of the second diverter 420, the velocity of the air discharged from the upper air outlet 112a is greater than the velocity of the air discharged from the lower air outlet 112b. That is, the velocity of hot air is lower, while the velocity of cold air is higher. A higher initial velocity of cold air means it can reach a greater distance; a lower initial velocity of hot air means it cannot provide a noticeable blowing sensation when blowing directly on a person, thus reducing the user's experience.

[0057] Please see Figure 5 Unlike the above embodiments, in another embodiment, the flow-dividing component 400 extends linearly from the inside of the heat exchange duct 110 towards the outside of the air outlet 112, making the area of ​​the upper air outlet 112a similar to the area of ​​the lower air outlet 112b. In this case, the flow-dividing component 400 is essentially a straight plate. When the cold and hot air are discharged from the air outlet 112 along the flow-dividing component 400, the distance between adjacent airflows is too small, causing the cold and hot air to interfere with each other after discharge, thus failing to achieve a good dual-temperature effect.

[0058] Please see Figure 4In another embodiment, the diversion assembly 400 includes an upper diversion plate 440 and a lower diversion plate 450 connected at an angle. The rear end of the upper diversion plate 440 is connected to the rear end of the lower diversion plate 450. Both the upper diversion plate 440 and the lower diversion plate 450 extend outward toward the air outlet 112. The upper diversion plate 440 is closer to the volute tongue 130 relative to the volute housing 120, and the lower diversion plate 450 is closer to the volute housing 120 relative to the volute tongue 130. The upper diversion plate 440 and the lower diversion plate 450 are set at a certain angle, so that the area of ​​the upper air outlet 112a and the area of ​​the lower air outlet 112b are similar, and a certain distance exists between the upper air outlet 112a and the lower air outlet 112b, which maintains the air outlet rates of cold and hot air while avoiding mutual interference between the cold and hot air.

[0059] In the above example, the diversion component 400 divides the air outlet 112 into an upper air outlet 112a and a lower air outlet 112b with a certain distance between them. However, it does not separate the cold air passing through the front heat exchanger 210 and the hot air passing through the rear heat exchanger 220 in the heat exchange duct 110. This means that the cold air and hot air have mixed together in the heat exchange duct 110 between the air outlet 112 and the heat exchange duct 110. The temperature difference between the cold air and hot air discharged from the air outlet 112 is reduced, resulting in a decrease in the dual-temperature effect of the indoor unit 10 of the air conditioner.

[0060] Please see Figure 1 and Figure 6 Therefore, unlike the above embodiments, in one embodiment, the flow-diverting assembly 400 includes a first flow-diverting plate 410, a second flow-diverting plate 420, and a third flow-diverting plate 430 connected at an angle. The second flow-diverting plate 420 extends toward the interior of the heat exchange duct 110. The rear ends of the first flow-diverting plate 410 and the third flow-diverting plate 430 are connected to the front ends of the second flow-diverting plate 420. The first flow-diverting plate 410 and the third flow-diverting plate 430 extend toward the exterior of the air outlet 112. One of the first flow-diverting plate 410 and the second flow-diverting plate 420 is closer to the volute tongue 130 relative to the volute 120, and the other is closer to the volute 120 relative to the volute tongue 130.

[0061] The second diverter plate 420 is disposed within the heat exchange duct 110 to separate the cold air formed after passing through the front heat exchanger 210 and the hot air formed after passing through the rear heat exchanger 220, preventing the cold and hot air from mixing prematurely before exiting the air outlet 112; the first diverter plate 410 and the third diverter plate 430 are arranged at a certain angle, so that the area of ​​the upper air outlet 112a and the area of ​​the lower air outlet 112b are similar, and there is a certain distance between the upper air outlet 112a and the lower air outlet 112b, which maintains the air outlet rate of the cold and hot air and avoids mutual interference between the cold and hot air; the diverter assembly 400 separates a section of the heat exchange duct 110 near the air outlet 112 into independent upper and lower air outlet channels.

[0062] Preferably, of the first diverter plate 410 and the third diverter plate 430, the one closer to the volute tongue 130 relative to the volute housing 120 is inclined upwards, and the other is inclined downwards. For example, the first diverter plate 410 is closer to the volute tongue 130 relative to the volute housing 120 and is inclined upwards, while the third diverter plate 430 is closer to the volute housing 120 relative to the volute tongue 130 and is inclined downwards. The upward inclination of the first diverter plate 410 causes the upper air outlet 112a to exhaust air upwards, which helps the cold air exhausted from the upper air outlet 112a to fill the entire indoor space more quickly; the downward inclination of the third diverter plate 430 causes the lower air outlet 112b to exhaust air downwards, which helps the hot air exhausted from the lower air outlet 112b to be blown more concentratedly towards the human body, bringing a more sufficient direct airflow sensation to the human body.

[0063] Specifically, the outer radius of the fan 300 ranges from 85 to 132 mm, and the ratio of the minimum distance between the rear end of the diverter assembly 400 and the fan 300 to the outer radius of the fan 300 ranges from 0.1 to 1.2. The rear end of the diverter assembly 400 extends to the rear side of the center vertical line of the fan 300, and the vertical angle Z of the line connecting the upper vertex of the rear end of the diverter assembly 400 and the rotation center 310 of the fan 300 ranges from 0° to 44°. The rear end of the diverter assembly 400 extends to the front side of the center vertical line of the fan 300, and the vertical angle Z of the line connecting the upper vertex of the rear end of the diverter assembly 400 and the rotation center 310 of the fan 300 ranges from 0° to 24°.

[0064] If the fan 300 is too small, the air intake will be small, and the corresponding air output will not meet the requirements, which will reduce the rate at which the indoor unit 10 cools the room. At the same time, insufficient air output may also reduce the intensity of the direct airflow from the lower air outlet 112b, thus reducing the comfort of the direct airflow. If the fan 300 is too large, the overall size of the indoor unit 10 will be larger, and the space required for installation will be larger. The smaller the minimum distance between the rear end of the diversion component 400 and the fan 300, the better the separation effect of the diversion component 400 on the cold and hot air blown by the fan 300 within the heat exchange duct 110. However, if the minimum distance between the rear end of the diversion component 400 and the fan 300 is too small, the impact effect of the air blown by the fan 300 on the diversion component 400 will be stronger, the diversion component 400 will create resistance to the airflow, the air velocity will decrease, and the amount of air passing through the air outlet 112 per unit time will decrease. There is an optimal value for the ratio of the minimum distance between the rear end of the diversion component 400 and the fan 300 to the outer radius of the fan 300. When the rear end of the flow divider 400 extends to the rear side of the center vertical line of the fan 300, the larger the vertical angle Z of the line connecting the upper vertex of the rear end of the flow divider 400 and the rotation center 310 of the fan 300, the longer the second flow divider plate 420 extends into the heat exchange duct 110, and the earlier the cold and hot air blown out by the fan 300 can be separated. When the rear end of the flow divider 400 extends to the front side of the center vertical line of the fan 300, the larger the vertical angle Z of the line connecting the upper vertex of the rear end of the flow divider 400 and the rotation center 310 of the fan 300, the more time the cold and hot air blown out by the fan 300 has to mix in the heat exchange duct 110, and the smaller the temperature difference between the upper air outlet 112a and the lower air outlet 112b. However, the longer the second diverter plate 420 extends into the heat exchange duct 110, the greater the resistance to airflow within the duct 110, resulting in a decrease in airflow velocity and a reduction in airflow at the upper outlet 112a and lower outlet 112b. Conversely, if the second diverter plate 420 extends too short into the heat exchange duct 110, it cannot effectively separate cold and hot air, and premature mixing consumes air energy, further reducing airflow velocity and airflow at the upper outlet 112a and lower outlet 112b. Therefore, there exists a suitable vertical angle Z between the upper apex of the diverter assembly 400's rear end and the rotation center 310 of the fan 300.

[0065] Table 1. Test data of airflow and temperature of indoor air conditioning unit

[0066]

[0067] Table 1 shows the test results of the changes in the airflow rate and air temperature of the upper air outlet 112a and lower air outlet 112b when the ratio of the minimum distance between the rear end of the diverter assembly 400 and the fan 300 to the outer radius of the fan 300 is different, and the vertical angle Z of the line connecting the upper vertex of the rear end of the diverter assembly 400 and the rotation center 310 of the fan 300 is different. It can be concluded that, preferably, the ratio of the minimum distance between the rear end of the diverter assembly 400 and the fan 300 to the outer radius of the fan 300 is 0.35; and the vertical angle Z of the line connecting the upper vertex of the rear end of the diverter assembly 400 and the rotation center 310 of the fan 300 is 12°. Furthermore, at this time, the sum of the air flow rates of the upper air outlet 112a and the lower air outlet 112b is greater than the air flow rate of the air outlet 112 of the existing air conditioner indoor unit 10. This indicates that the second diverter plate 420 can effectively separate the cold and hot air blown out by the fan 300 without causing its own resistance to significantly affect the air flow rate of the air outlet 112.

[0068] Furthermore, the angle W between the top rear surface of the diversion component 400 and the horizontal plane ranges from 0° to 90°. When the angle W between the top rear surface of the diversion component 400 and the horizontal plane is different, the impact angle between the air discharged from the fan 300 and the second diversion plate 420 is also different. The energy loss of the flowing air is greatest when the air discharged from the fan 300 impacts the second diversion plate 420 perpendicularly, and the resistance to the air is minimized when the direction of the second diversion plate 420 is similar to the airflow direction within the heat exchange duct 110. For example, preferably, the angle W between the top rear surface of the diversion component 400 and the horizontal plane is 30°. The end face of the second diversion plate 420 away from the air outlet 112 and the upper and lower sides of the second diversion plate 420 can be arranged in an arc or streamlined shape, guiding the air flowing against the second diversion plate 420 and further reducing the airflow resistance within the heat exchange duct 110.

[0069] The ratio of the distance between the top rear surface of the diversion component 400 and the upper wall of the heat exchange duct 110 to the distance between the bottom rear surface of the diversion component 400 and the lower wall of the heat exchange duct 110 ranges from 0.5 to 3. Different distances between the second diversion plate 420 and the upper and lower walls of the heat exchange duct 110 result in different airflow rates in the upper and lower ducts. The closer the plate is to the upper wall of the heat exchange duct 110, the more air flows into the lower duct; conversely, the closer the plate is to the lower wall, the more air flows into the upper duct. If the amount of cold air discharged from the upper air outlet 112a is too small, it cannot quickly cool the room; if the amount of hot air discharged from the lower air outlet 112b is too small, it cannot provide the user with the comfort of direct airflow. Preferably, the ratio of the distance between the rear top surface of the diversion component 400 and the upper wall of the heat exchange duct 110 to the distance between the rear bottom surface of the diversion component 400 and the lower wall of the heat exchange duct 110 is 2. In this case, the amount of air flowing into the upper air duct is greater than the amount flowing into the lower air duct. This is because the main function of the indoor air conditioner is to cool the room; the larger volume of cold air discharged from the upper outlet can quickly lower the indoor temperature. Simultaneously, the volume of hot air discharged from the lower air outlet 112b can also satisfy the user's comfort with direct airflow.

[0070] The first diverter plate 410 and the third diverter plate 430, whichever is closer to the volute tongue 130 relative to the volute 120, are inclined upwards at an angle X ranging from 0° to 15°. For example, when the first diverter plate 410 is closer to the volute tongue 130 relative to the volute 120, the upward inclination angle X of the first diverter plate 410 is different, indicating that the air outlet angle of the upper air outlet 112a is different. The larger the air outlet angle of the upper air outlet 112a, the higher the height the cold air discharged from the upper air outlet 112a can reach, but the horizontal distance it can reach is also shorter, and it cannot quickly cover areas far from the air outlet 112a in the room; the smaller the air outlet angle of the upper air outlet 112a, the farther the horizontal distance the cold air discharged from the upper air outlet 112a can reach, but the height it can reach is also lower, and the cold air will flow downwards due to gravity after being discharged, causing the temperature of the upper space in the room to not drop quickly. Preferably, the first diverter plate 410 is tilted upward at an angle X of 5° to balance the height and horizontal distance that the cold air discharged from the upper air outlet 112a can reach, so that the cold air can quickly fill the entire indoor space.

[0071] The first diverter plate 410 and the third diverter plate 430, whichever is closer to the volute 120 relative to the volute tongue 130, are inclined downwards at an angle Y ranging from 45° to 90°. For example, when the third diverter plate 430 is closer to the volute 120 relative to the volute tongue 130, the downward inclination angle Y of the third diverter plate 430 is different, indicating that the air outlet angle of the lower air outlet 112b is different. The larger the downward inclination angle of the third diverter plate 430, the shorter the horizontal distance that the hot air discharged from the lower air outlet 112b can cover, and the user needs to be closer to the lower air outlet 112b to be directly exposed to the hot air; the smaller the downward inclination angle Y of the third diverter plate 430, the longer the horizontal distance that the hot air discharged from the lower air outlet 112b can cover, but the hot air flows upwards because its density is lower than that of cold air, resulting in a decrease in the airflow volume when directly exposed to the air, and a decrease in the user's comfort when directly exposed to the air. Preferably, the downward tilt angle Y of the third diverter plate 430 is 65°, which balances the horizontal distance that the hot air discharged from the lower air outlet 112b can cover and the air volume when it reaches the human body, thus satisfying the user's comfort with direct airflow.

[0072] Furthermore, in one embodiment, to prevent cold and hot air from mixing directly after being discharged from the upper air outlet 112a and the lower air outlet 112b respectively, which would affect both the rapid reduction of indoor temperature by the cold air and the user's comfort when directly exposed to hot air, preferably, the angle formed by the first diverter plate 410 and the third diverter plate 430 is greater than 50°. Simultaneously, the upper air outlet 112a and the lower air outlet 112b are angled, resulting in a smaller air source compared to existing air conditioner indoor units 10. This means less noise is generated by the airflow, and the user experiences less noise when directly exposed to air or within the angle formed by the upper air outlet 112a and the lower air outlet 112b, thus improving the user experience of the air conditioner indoor unit 10.

[0073] The opening size of the air outlet 112 is limited. Besides controlling the angles of the upper air outlet 112a and the lower air outlet 112b, it is also necessary to control the opening size of the upper air outlet 112a and the lower air outlet 112b. When the opening sizes of the upper air outlet 112a and the lower air outlet 112b are reasonable, it is necessary to ensure that the cold air discharged from the upper air outlet 112a can rapidly cool the room, while also ensuring that the hot air discharged from the lower air outlet 112b will not cause significant changes in the room temperature, i.e., it will not significantly affect the cooling rate of the cold air. Preferably, the ratio of the height of the upper air outlet 112a to the height of the lower air outlet 112b is in the range of 0.8-1.

[0074] This invention also proposes an air conditioner, which includes an outdoor unit and an indoor unit 10 as described above. The specific structure of the indoor unit 10 is as described in the above embodiments. Since this air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The outdoor unit includes a compressor, a third heat exchanger, and an electronic expansion valve. The compressor, the third heat exchanger, the electronic expansion valve, and the heat exchanger assembly 200 are sequentially connected to form a heat exchange circuit. The electronic expansion valve includes a first electronic expansion valve and a second electronic expansion valve that can be controlled independently. The third heat exchanger is connected to the front heat exchanger 210 and the rear heat exchanger 220 through the first electronic expansion valve and the second electronic expansion valve, respectively. In this embodiment, the independent adjustment of the temperature of the front heat exchanger 210 and the rear heat exchanger 220 is achieved by adjusting the opening degree of the first electronic expansion valve and the second electronic expansion valve.

[0075] Furthermore, in one embodiment, the heat exchange circuit further includes a four-way valve, which connects the compressor outlet, the compressor inlet, the outlet of the heat exchanger assembly 200, and the inlet of the third heat exchanger. The flow direction of the refrigerant within the heat exchange circuit can be changed by adjusting the four-way valve. When the four-way valve is adjusted so that the refrigerant flows from the compressor outlet into the inlet of the third heat exchanger, and finally from the outlet of the heat exchanger assembly 200 into the compressor inlet, the heat exchanger assembly 200 functions as an evaporator, and the indoor unit 10 cools the room. When the four-way valve is adjusted so that the refrigerant flows from the compressor outlet into the outlet of the heat exchanger assembly 200, and finally from the inlet of the third heat exchanger into the compressor inlet, the heat exchanger assembly 200 functions as a condenser, and the indoor unit 10 warms the room.

[0076] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air conditioner indoor unit characterized by comprising: The application relates to a heat exchange device. The heat exchange device comprises a shell, a heat exchange air duct formed in the shell, an air fan, a heat exchanger assembly and a flow distribution assembly. The heat exchange air duct has an air inlet and an air outlet. The heat exchanger assembly is arranged in the heat exchange air duct. The flow distribution assembly is arranged at the air outlet and separates the air outlet into an upper air outlet and a lower air outlet. The heat exchanger assembly comprises a front heat exchanger and a rear heat exchanger, and the temperatures of the front heat exchanger and the rear heat exchanger can be independently adjusted. The outer radius of the air fan ranges from 85 mm to 132 mm, and the ratio of the minimum distance between the rear end of the flow distribution assembly and the air fan to the outer radius of the air fan ranges from 0.1 to 1.

2.

2. The air conditioning indoor unit as claimed in claim 1, wherein, The shell comprises a volute and a volute tongue. The flow distribution assembly comprises a first flow distribution plate and a second flow distribution plate connected at an included angle. The second flow distribution plate extends towards the inside of the heat exchange air duct.

3. The air conditioning indoor unit as claimed in claim 2, wherein The rear end of the first flow distribution plate is connected to the front end of the second flow distribution plate.

4. The air conditioning indoor unit as claimed in claim 3, wherein The first flow distribution plate extends towards the outside of the air outlet.

5. The air conditioning indoor unit as claimed in claim 1, wherein The first flow distribution plate is closer to the volute tongue than to the volute. 6.The indoor unit of the air conditioner of claim 1, wherein, The first flow distribution plate is closer to the volute than to the volute tongue.

7. The air conditioning indoor unit according to any one of claims 2 to 5, characterized by The flow distribution assembly further comprises a third flow distribution plate.

8. The air conditioning indoor unit according to any one of claims 2 to 5, wherein The rear end of the third flow distribution plate is connected to the front end of the second flow distribution plate.

9. The air conditioning indoor unit according to any one of claims 2 to 5, wherein One of the first flow distribution plate and the third flow distribution plate is closer to the volute tongue than to the volute.

10. The air conditioning indoor unit according to any one of claims 2 to 5, wherein The other one of the first flow distribution plate and the third flow distribution plate is closer to the volute than to the volute tongue.

11. The air conditioning indoor unit according to any one of claims 3 to 4, wherein One of the first flow distribution plate and the third flow distribution plate is arranged upwardly at an inclination angle.

12. The air conditioning indoor unit according to any one of claims 3 to 4, characterized by The other one of the first flow distribution plate and the third flow distribution plate is arranged downwardly at an inclination angle.

13. The air conditioning indoor unit according to any one of claims 3 to 4, characterized by The flow distribution assembly extends linearly from the inside of the heat exchange air duct to the outside of the air outlet. The shell comprises a volute and a volute tongue. The flow distribution assembly comprises an upper flow distribution plate and a lower flow distribution plate connected at an included angle. The rear end of the upper flow distribution plate is connected to the rear end of the lower flow distribution plate. The upper flow distribution plate and the lower flow distribution plate both extend towards the outside of the air outlet. The upper flow distribution plate is closer to the volute tongue than to the volute. The lower flow distribution plate is closer to the volute than to the volute tongue. The rear end of the flow distribution assembly extends to the rear side of the vertical line of the center of the air fan. The vertical angle between the upper vertex of the rear end of the flow distribution assembly and the line connecting the center of rotation of the air fan ranges from 0 to 44 degrees. The rear end of the flow distribution assembly extends to the front side of the vertical line of the center of the air fan. The vertical angle between the upper vertex of the rear end of the flow distribution assembly and the line connecting the center of rotation of the air fan ranges from 0 to 24 degrees. The included angle between the top surface of the rear end of the flow distribution assembly and the horizontal plane ranges from 0 to 90 degrees. The ratio of the distance between the top surface of the rear end of the flow distribution assembly and the upper wall of the heat exchange air duct to the distance between the bottom surface of the rear end of the flow distribution assembly and the lower wall of the heat exchange air duct ranges from 0.5 to 3. One of the first flow distribution plate and the third flow distribution plate is arranged upwardly at an inclination angle ranging from 0 to 15 degrees. The other one of the first flow distribution plate and the third flow distribution plate is arranged downwardly at an inclination angle ranging from 45 to 90 degrees. The included angle formed by the first flow distribution plate and the third flow distribution plate is greater than 50 degrees.

14. The air conditioning indoor unit according to any one of claims 3 to 4, characterized by The ratio of the height of the upper air outlet to the height of the lower air outlet ranges from 0.8 to 1.

15. The air conditioning indoor unit according to any one of claims 1 to 6, characterized by The evaporation temperature of the front heat exchanger is not higher than the evaporation temperature of the rear heat exchanger.

16. An air conditioner characterized by comprising: The air conditioner indoor unit comprises an outdoor unit and an indoor unit as claimed in any one of claims 1 to 15, the outdoor unit comprising a compressor, a third heat exchanger and an electronic expansion valve, the compressor, the third heat exchanger, the electronic expansion valve and the heat exchanger assembly being sequentially communicated to form a heat exchange circuit, the electronic expansion valve comprising a first electronic expansion valve and a second electronic expansion valve which can be independently controlled, the third heat exchanger being communicated with the front heat exchanger and the rear heat exchanger through the first electronic expansion valve and the second electronic expansion valve respectively.

17. The air conditioner of claim 16, wherein The heat exchange circuit further comprises a four-way valve, the four-way valve being communicated with the outlet of the compressor, the inlet of the compressor, the outlet of the heat exchanger assembly and the inlet of the third heat exchanger. The heat exchange circuit further comprises a four-way valve, the four-way valve being communicated with the outlet of the compressor, the inlet of the compressor, the outlet of the heat exchanger assembly and the inlet of the third heat exchanger.

Images