Flow guide structure, air conditioner and flow guide control method

Abstract

The invention discloses a flow guide structure, an air conditioner and a flow guide control method.The flow guide structure comprises a heat exchange module, a fan and a flow guide module, the fan is used for blowing airflow to the heat exchange module, the flow guide module is provided with a flow guide plate located between an air outlet of the fan and the heat exchange module, and the flow guide plate is used for guiding the heat exchange module. The posture of the flow guide plate can be changed so as to adjust the state of airflow blown to the heat exchange module; wherein the heat exchange module comprises an upper heat exchanger and a lower heat exchanger which work independently, and the flow guide module has at least one of a conventional posture, a water blowing prevention posture, a dehumidification heating posture, a dehumidification cooling posture and a dehumidification middle posture. The flow field state between the fan and the heat exchange module can be effectively adjusted, and the air outlet comfort degree is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flow guide structures, and in particular to a flow guide structure, an air conditioner and a flow guide control method. Background Art

[0002] As people's requirements for indoor environmental comfort continue to increase, air conditioners are not only required to have efficient cooling / heating functions, but also to perform well in humidity control to meet the needs of use in different seasons and climate conditions. The indoor heat exchanger design of traditional air conditioners usually adopts a single structure with the upper and lower parts keeping the same temperature. It is mainly used to achieve air cooling or heating, but its performance in dehumidification is relatively limited.

[0003] In order to further optimize the dehumidification performance of the air conditioner and keep the indoor temperature stable and uniform, air conditioners integrating cooling, heating and dehumidification functions have gradually appeared on the market, such as the common constant temperature dehumidification duct air conditioner. Figure 1 As shown, this type of air conditioner divides the indoor heat exchanger into two parts, the upper and lower parts. In the constant temperature dehumidification mode, they respectively assume the functions of dehumidification and heat exchange. That is, the upper heat exchanger focuses on dehumidification, while the lower heat exchanger is mainly responsible for providing heat to adjust the outlet air temperature, so as to achieve more refined temperature and humidity regulation.

[0004] However, although this arrangement of upper and lower heat exchangers can significantly improve the dehumidification efficiency and temperature control capabilities of the air conditioner in theory, it faces a major challenge in practical applications: due to the difference in the operating temperatures of the upper and lower heat exchangers, the temperature and humidity of the airflow will change significantly when it flows through the two heat exchangers. The control scheme of existing ducted air conditioners is usually designed based on a single indoor heat exchanger, and lacks research on precise control of airflow when the upper and lower temperatures are inconsistent. When applied to constant temperature dehumidification ducted air conditioners, it cannot be guaranteed that the air sent by the upper heat exchanger and the air sent by the lower heat exchanger can meet the indoor use requirements after mixing, which seriously limits the improvement of the overall performance of the ducted air conditioner.

[0005] Therefore, how to design a flow guide structure, an air conditioner and a flow guide control method that can flexibly adjust the airflow state of a heat exchange module is a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0006] In order to solve the problem of unstable temperature control of existing air conditioners, the present invention proposes a guide structure, an air conditioner and a guide control method. The guide structure can effectively adjust the flow field state between the fan and the heat exchange module, and effectively improve the air outlet comfort.

[0007] The technical solution adopted by the present invention is to design a flow guide structure, including:

[0008] A heat exchange module, the heat exchange module comprising: an upper heat exchanger and a lower heat exchanger that work independently;

[0009] A fan, the fan is used to blow air to the heat exchange module;

[0010] A flow guide module, wherein the flow guide module has a flow guide plate located between the air outlet of the fan and the heat exchange module, and the flow guide plate can change its posture to adjust the air flow of the upper heat exchanger and the lower heat exchanger.

[0011] Furthermore, the diversion module includes:

[0012] A support frame, wherein the support frame is fixedly installed;

[0013] A first motor, wherein the first motor is mounted on the support frame;

[0014] A power telescopic rod, the fixed end of which is connected to the transmission shaft of the first motor, the first motor is used to drive the power telescopic rod to rotate, the guide plate is connected to the movable end of the power telescopic rod, and the power telescopic rod is used to adjust the distance of the guide plate relative to the support frame.

[0015] Furthermore, the diversion module also includes:

[0016] A rotating shaft, the rotating shaft is movably mounted on the movable end of the power telescopic rod, and the guide plate is fixed on the rotating shaft;

[0017] A second motor, the second motor is used to drive the rotating shaft to rotate;

[0018] Wherein, the transmission shaft of the first motor, the transmission shaft of the second motor and the rotating shaft are all parallel to the length direction of the guide plate.

[0019] Furthermore, the guide plate is fixed to the rotating shaft via an intermediate connecting piece, one end of the intermediate connecting piece is detachably mounted on the guide plate, and the other end of the intermediate connecting piece is detachably mounted on the rotating shaft.

[0020] Furthermore, the length L2 of the air outlet of the fan is greater than the length L1 of the guide plate, so as to allow the guide plate to extend into the air outlet.

[0021] Furthermore, the air inlet end of the upper heat exchanger is inclined upward, the air inlet end of the lower heat exchanger is inclined downward, and the air outlet end of the upper heat exchanger is close to the air outlet end of the lower heat exchanger.

[0022] Furthermore, the diversion module has at least one of a normal posture, a water-proof posture, a dehumidification and heating posture, a dehumidification and cooling posture, and a dehumidification intermediate posture;

[0023] The guide plate is away from the air outlet of the fan and the heat exchange module in the normal posture;

[0024] And / or the guide plate moves to a position close to the bottom of the heat exchange module in the anti-blow water posture, and one end of the guide plate close to the heat exchange module is tilted upward to guide the airflow to prevent water from entering the water receiving tray below the heat exchange module;

[0025] and / or the guide plate moves to the air outlet of the fan in the dehumidification and heating posture, and one end of the guide plate close to the heat exchange module tilts downward to reduce the air flow of the upper heat exchanger;

[0026] and / or the guide plate moves to the air outlet of the fan in a dehumidification and cooling posture, and one end of the guide plate close to the heat exchange module tilts upward to increase the air flow of the upper heat exchanger;

[0027] And / or the guide plate moves to the air outlet of the fan in the intermediate dehumidification posture, and the guide plate is arranged along the air flow direction of the fan.

[0028] In some embodiments, the fan is a centrifugal fan, and an air outlet facing the heat exchange module is provided on the upper part of the fan, and the air outlet is inclined downward on a side close to the heat exchange module, and the angle β between the lower edge of the air outlet of the fan and the horizontal direction is 8°~10°;

[0029] The normal posture is that the guide plate is parallel to the lower edge of the air outlet of the fan, and the parallel distance L1 from the guide plate to the lower edge of the air outlet of the fan is between 0.2L and 0.3L, and the minimum vertical distance L2 from the guide plate to the water receiving tray is between 0.3L and 0.4L, and L is the vertical distance from the lower edge of the air outlet of the fan to the bottom of the shell where the guide structure is located;

[0030] And / or the anti-blow water posture is that the angle β3 between the guide plate and the horizontal direction is 0-10°, and the minimum vertical distance L5 from the guide plate to the water receiving tray is 3mm-5mm;

[0031] And / or the dehumidification and heating posture is that the angle β2 between the guide plate and the horizontal direction is between 32° and 38°;

[0032] And / or the dehumidification and cooling posture is that the angle β1 between the guide plate and the horizontal direction is 12°~15°;

[0033] And / or the dehumidification intermediate posture is that the angle β0 between the guide plate and the horizontal direction is between 8° and 10°.

[0034] The present invention further provides an air conditioner, which comprises an indoor unit, and the indoor unit comprises the above-mentioned flow guide structure.

[0035] In some embodiments, the air conditioner is a ducted air conditioner.

[0036] The present invention also proposes a flow diversion control method, which is applied to the above air conditioner and includes:

[0037] Obtaining the operating mode of the air conditioner;

[0038] The posture of the guide structure is controlled according to the working mode.

[0039] Further, controlling the posture of the guide structure according to the working mode includes:

[0040] When the working mode is the normal mode, detecting the actual water level of the water receiving tray below the heat exchange module;

[0041] Determining whether the actual water level rises to a set dangerous water level;

[0042] If yes, control the diversion module to switch to the anti-blow water posture;

[0043] If not, controlling the diversion module to switch to a normal posture;

[0044] The normal mode includes at least one of a standby mode, a cooling mode and a heating mode.

[0045] Further, controlling the posture of the guide structure according to the working mode includes:

[0046] When the working mode is the constant temperature dehumidification mode, the upper heat exchanger of the heat exchange module is in the cooling state and the lower heat exchanger is in the heating state, the actual air outlet temperature T1 of the upper heat exchanger and the actual air outlet temperature T2 of the lower heat exchanger are detected, and the temperature difference T3 = T2-T1 is calculated;

[0047] Comparing the temperature difference T3 with a set value T4;

[0048] When T3>T4, the diversion module is controlled to switch to a dehumidification and cooling posture;

[0049] and / or when T3=T4, controlling the flow guide module to switch to the dehumidification intermediate posture;

[0050] And / or when T3<T4, control the diversion module to switch to the dehumidification and heating posture.

[0051] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0052] 1. A variable-position guide plate is designed between the air outlet of the fan and the heat exchanger. The guide plate is used to adjust the airflow state of the fan blowing to the heat exchange module to control the air supply effect of the heat exchange module. Especially in the constant temperature dehumidification state, the airflow discharged from different areas of the heat exchange module can be mixed with cold and hot air in a balanced manner, achieving constant temperature air supply and significantly improving comfort.

[0053] 2. The air guide module is installed between the fan and the heat exchange module as an independent mechanical motion module. It occupies a small space and does not affect the installation of other components in the air conditioner. The air guide plate can be flexibly changed in posture. When it is switched to the normal posture away from the fan outlet and the heat exchange module, it has little effect on the cooling and heating efficiency, thus ensuring the reliability of the air conditioner in different modes.

[0054] 3. The guide plate can be moved downward to the water tray under the heat exchange module and set at an angle so that there is an angle between the air flow direction passing through the guide plate and the water flow direction, which can prevent the air flow from directly blowing to the bottom plate of the indoor unit and avoid the generation of vortex airflow at the bottom of the indoor unit, making the air flow near the water tray more stable, and effectively blocking the water flow from entering the water tray under the heat exchange module to prevent the overflow of accumulated water that has not been discharged in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The present invention is described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0056] Figure 1 It is a structural schematic diagram of an existing duct machine;

[0057] Figure 2 It is a structural schematic diagram of the indoor unit of the present invention;

[0058] Figure 3 It is a structural schematic diagram of the flow diversion module of the present invention;

[0059] Figure 4 It is a schematic diagram of the dimensions of the air outlet and the guide plate of the present invention;

[0060] Figure 5 Schematic diagram of the conventional posture of the flow guide module of the present invention;

[0061] Figure 6 Schematic diagram of the anti-blow water posture of the diversion module of the present invention;

[0062] Figure 7 It is a schematic diagram of the dehumidification and heating posture of the flow guide module of the present invention;

[0063] Figure 8 Schematic diagram of the dehumidification intermediate posture of the flow guide module of the present invention;

[0064] Fig. 9 Schematic diagram of the dehumidification and cooling posture of the flow guide module of the present invention;

[0065] Fig.10 It is a schematic diagram of the dimensions of the conventional posture of the present invention;

[0066] Fig.11 It is a schematic diagram of the dimensions of the anti-blow water posture of the present invention;

[0067] Fig.12 It is a schematic diagram of the dimensions of the dehumidification and heating posture of the present invention;

[0068] Fig.13 It is a schematic diagram of the dimensions of the intermediate posture of the dehumidification of the present invention;

[0069] Fig.14 It is a schematic diagram of the dimensions of the dehumidification and cooling posture of the present invention;

[0070] Fig.15 It is a schematic flow chart of the flow diversion control method of the present invention;

[0071] Description of the drawings: 1. Casing; 11. Air supply port; 2. Fan; 21. Air outlet; 3. Heat exchange module; 31. Upper heat exchanger; 32. Lower heat exchanger; 4. Guide module; 41. Guide plate; 42. Support frame; 43. First motor; 44. Power telescopic rod; 45. Rotating shaft; 46. Intermediate connecting piece; 5. Water tray. DETAILED DESCRIPTION

[0072] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0073] like Figure 2 As shown, the flow guide structure proposed in the present invention is suitable for an air conditioner, especially an indoor unit of an air conditioner. The flow guide structure includes a heat exchange module 3, a fan 2 and a flow guide module 4. The fan 2 is used to blow air to the heat exchange module 3. The flow guide module 4 has a flow guide plate 41 located between the air outlet 21 of the fan 2 and the heat exchange module 3. The flow guide plate 41 can change its posture to adjust the state of the air flow blowing to the heat exchange module 3.

[0074] Taking the duct air conditioner as an example, the heat exchange module 3, the fan 2 and the guide module 4 are arranged in the casing 1. The casing 1 has an air supply port 11 connected to the room. The heat exchange module 3 is close to the air supply port 11. When the fan 2 is working, it blows air to the heat exchange module 3, and the airflow processed by the heat exchange module 3 enters the room through the air supply port 11. After the guide plate 41 changes its posture, the state of the airflow blown by the fan 2 to the heat exchange module 3 changes, so as to control the air supply effect of the heat exchange module 3, especially in the constant temperature dehumidification state, by adjusting the airflow in different areas of the heat exchange module 3 through the posture of the guide plate 41, the airflow discharged from the heat exchange module 3 can be balanced with hot and cold air, so as to achieve constant temperature air supply on the basis of dehumidification, thereby significantly improving the comfort.

[0075] like Figure 3 As shown, in some embodiments of the present invention, the air guide module 4 includes: a support frame 42, a first motor 43 and a power telescopic rod 44. The support frame 42 is installed in the housing 1 to support the entire air guide module 4. The preferred solution is to install it below the air outlet 21 to avoid affecting the air discharge of the fan 2 in normal mode. The first motor 43 is installed on the support frame 42, the fixed end of the power telescopic rod 44 is connected to the transmission shaft of the first motor 43, and the air guide plate 41 is connected to the movable end of the power telescopic rod 44. The power telescopic rod 44 includes but is not limited to a pneumatic telescopic rod, a hydraulic telescopic rod, an electric telescopic rod, etc. The specific type can be selected according to actual use requirements.

[0076] When the transmission shaft of the first motor 43 rotates, it drives the power telescopic rod 44 to rotate synchronously, and the guide plate 41 rotates along with the power telescopic rod 44. When the power telescopic rod 44 is extended, the guide plate 41 is pushed outward, and when the power telescopic rod 44 is shortened, the guide plate 41 is pulled inward. During the rotation and telescopic movement of the power telescopic rod 44, the position and inclination angle of the guide plate 41 change, thereby adjusting the flow field state between the fan 2 and the heat exchange module 3.

[0077] This design installs the guide module 4 as an independent mechanical motion module between the fan 2 and the heat exchange module 3, which occupies a small space and does not affect the installation of other components in the air conditioner indoor unit. The guide plate 41 has a variable posture and can adapt to different airflow adjustment requirements to improve the working performance of the air conditioner.

[0078] On the basis of the above-mentioned guide module 4, in order to improve the flexibility of the guide plate 41, the guide module 4 also includes a rotating shaft 45, which is movably installed on the movable end of the power telescopic rod 44, and the guide plate 41 is fixed on the rotating shaft 45. The rotating shaft 45 is connected to the transmission shaft of the second motor (not shown in the figure). When the transmission shaft of the second motor rotates, the rotating shaft 45 is driven to rotate synchronously, and the guide plate 41 rotates with the rotating shaft 45. The transmission shaft of the first motor 43, the transmission shaft of the second motor and the rotating shaft 45 are all parallel to the length direction of the guide plate 41, that is, under the drive of the first motor 43, the guide plate 41 rotates around the fixed end of the power telescopic rod 44, and under the drive of the second motor, the guide plate 41 rotates around the movable end of the power telescopic rod 44. Under the drive of the power telescopic rod 44, the guide plate 41 can approach or move away from the support frame 42. Therefore, under the joint action of the first motor 43, the power telescopic rod 44 and the second motor, the position and inclination angle of the guide plate 41 can be flexibly adjusted within a larger range, the function is more complete and the guide effect is better.

[0079] In the preferred embodiment, in order to facilitate installation and maintenance, the guide plate 41 and the rotating shaft 45 are connected by an intermediate connecting member 46. One end of the intermediate connecting member 46 can be detachably installed on the guide plate 41, and the other end can be detachably installed on the rotating shaft 45. After the intermediate connecting member 46 is added between the rotating shaft 45 and the guide plate 41, later damage mainly occurs in the intermediate connecting member 46. During maintenance, it is only necessary to disassemble and replace the intermediate connecting member 46.

[0080] Optionally, the support frame and the power telescopic rod 44 of the guide module 4 are of symmetrical structure, and a power telescopic rod 44 and a support frame 42 are respectively provided at both ends of the guide plate 41. Each power telescopic rod 44 is correspondingly configured with a first motor 43, and a dual-motor drive form is adopted to avoid the motor drive shaft from generating a large overturning bending moment when a single motor is driven, thereby affecting the reliability and service life of the guide module 4. If in actual applications, the motor drive shaft has good bending moment resistance and the length of the guide piece is short, a single motor form can also be adopted.

[0081] like Figures 2 to 4 As shown, for ease of understanding, some application examples of the present invention are used as examples. The fan 2 adopts a centrifugal fan, and the guide module 4 is installed below the air outlet 21 of the fan 2. The support frame 42 is fixed to the fan plate of the centrifugal fan by two pairs of screws. Since the guide plate 41 can achieve a better guide effect by changing its posture at the air outlet, the preferred solution is that the air outlet length L2 of the fan 2 is greater than the length L1 of the guide plate 41 to allow the guide plate 41 to extend into the air outlet 21. When the second motor is installed axially, an installation position for the second motor needs to be reserved between the air outlet 21 of the fan 2 and the guide plate 41, and the size requirement is , L 余For design margin, L5 is the required installation length of the second motor.

[0082] In addition, considering that after the power telescopic rod 44 is excessively rotated, there is interference between the power telescopic rod 44 and the air outlet 21 of the fan 2, and there is interference between the guide plate 41 and the water receiving tray 5 at the bottom of the casing 1, the rotation angle of the power telescopic rod 44 must be limited within a certain range. For example, the rotation angle range of the first motor 43 between the two extreme positions of the power telescopic rod 44 relative to the support frame 42 is 0~185°. Considering that after the guide plate 41 is excessively rotated, there is interference between the guide plate 41 and the power telescopic rod 44, the rotation angle of the guide plate 41 must be limited within a certain range. For example, the rotation angle range of the second motor between the two extreme positions of the guide plate 41 relative to the power telescopic rod 44 is 0~180°.

[0083] like Figure 5 As shown, the heat exchange module 3 of the present invention includes: an upper heat exchanger 31 and a lower heat exchanger 32 that work independently. When cooling or heating, the upper heat exchanger 31 and the lower heat exchanger 32 work in the cooling state or the heating state at the same time, and the temperature difference between the upper and lower heat exchangers is not large. The temperature of the airflow sent through the upper and lower heat exchangers is basically the same, and there is no excessive temperature difference.

[0084] During constant temperature dehumidification, the upper heat exchanger 31 cools and the lower heat exchanger 32 heats. Part of the airflow blown out by the fan 2 passes through the upper heat exchanger 31 for cooling and dehumidification, and the other part passes through the lower heat exchanger 32 for heating. Ideally, the air volume of the upper and lower heat exchangers is basically the same, with cold air flowing down and warm air flowing up. After the two airflows with different temperatures are mixed, the mixed temperature is maintained at the user-set temperature. However, the air outlet state of the fan 2 is affected by many factors, and it is impossible to ensure that the air volume blown to the upper and lower heat exchangers is the same. In particular, when the fan 2 adopts a centrifugal fan, under the influence of the angle of the volute tongue and the angle of the upper volute, there are disturbances and eddies in the airflow between the air outlet 21 of the centrifugal fan and the heat exchange module. The air volume passing through the upper and lower heat exchangers is obviously inconsistent, resulting in the mixed temperature of the two parts of the airflow deviating from the user-set temperature, affecting the user experience. If the refrigerant pressure and speed of the upper and lower heat exchangers are modified, it is necessary to design complex control logic to accurately control the compressor or the corresponding throttle valve, so that the cooling capacity of the upper heat exchanger 31 and the heating capacity of the lower heat exchanger 32 have a certain balance, and finally the supply air temperature of the heat exchange module 3 is kept constant. This places high demands on the controller, and its reliability and practicality are very poor.

[0085] Based on the inventor's in-depth research on the air conditioner, it was found that in the constant temperature dehumidification mode, the air supply temperature of the heat exchange module 3 is actually also affected by the gas flow difference passing through the upper heat exchanger 31 and the lower heat exchanger 32, and the air flow is affected by the flow velocity V and the flow area S. If the above-mentioned guide module 4 is added between the air outlet 21 of the fan 2 and the heat exchange module 3, then in the normal mode, the guide plate 41 can be kept away from the fan 2 and the heat exchange module 3, which has basically no effect on the cooling efficiency or heating efficiency, thereby ensuring the reliability of the air conditioner in the normal mode. In the dehumidification mode, the air flow of the upper heat exchanger 31 and the lower heat exchanger 32 can be adjusted to achieve constant temperature air supply and significantly improve the comfort.

[0086] In the preferred embodiment, the upper heat exchanger 31 and the lower heat exchanger 32 are designed to be inclined to increase the heat exchange area and improve the heat exchange efficiency. In particular, the air inlet end of the upper heat exchanger 31 is inclined upward, and the air inlet end of the lower heat exchanger 32 is inclined downward. The air outlet end of the upper heat exchanger 31 is close to the air outlet end of the lower heat exchanger 32, forming a V-shaped heat exchange module with an opening facing the fan 2. After passing through the upper and lower heat exchangers, the air flow will quickly converge and mix at the air supply port 11 to achieve a better air supply effect.

[0087] Specifically, the diversion module 4 can move to at least one of a normal posture, a water-blowing prevention posture, a dehumidification and heating posture, a dehumidification and cooling posture, and a dehumidification intermediate posture, and each posture is introduced in detail.

[0088] like Figure 5 As shown, in the normal posture, the guide plate 41 is away from the air outlet 21 of the fan 2 and the heat exchange module 3. On the one hand, there is a certain safety distance between the guide plate 41 and the air outlet 21 of the fan 2 in the vertical direction and the horizontal direction, ensuring that the guide plate 41 has basically no effect on the air outlet 21 of the fan 2. On the other hand, there is also a certain safety distance between the guide plate 41 and the heat exchange module 3, ensuring that the guide plate 41 will not affect the heat exchange efficiency of the heat exchange module 3.

[0089] like Figure 6 As shown, in the anti-blowing water posture, the guide plate 41 moves to the bottom close to the heat exchange module 3, and the end of the guide plate 41 close to the heat exchange module 3 is tilted upward, so that the airflow direction passing through the guide plate 41 and the water flow direction have a certain angle, which can not only prevent the airflow from directly blowing to the bottom plate of the indoor unit, avoid the generation of vortex airflow at the bottom of the indoor unit, and make the airflow near the water receiving tray 5 more stable, but also use the obstruction of the airflow to slow down the water flow entering the water receiving tray 5 below the heat exchange module 3, avoid the water level in the water receiving tray 5 from continuing to rise, and prevent the accumulated water that is not discharged in time from overflowing.

[0090] like Figure 7As shown, in the dehumidification and heating posture, the guide plate 41 moves to the air outlet 21 of the fan 2, and the end of the guide plate 41 close to the heat exchange module 3 is tilted downward, which is equivalent to the windward side of the guide plate 41 being tilted upward. The airflow is guided to flow downward along the guide plate 41 to reduce the airflow of the upper heat exchanger 31 and increase the airflow of the lower heat exchanger 32.

[0091] like Figure 8 As shown, in the intermediate dehumidification posture, the guide plate 41 moves to the air outlet 21 of the fan 2, and the guide plate 41 is set along the airflow direction of the fan 2. The guide plate 41 is basically parallel to the airflow direction at its position, and the airflow of the upper heat exchanger 31 and the lower heat exchanger 32 maintains the current state.

[0092] like Fig. 9 As shown, in the dehumidification and cooling posture, the guide plate 41 moves to the air outlet 21 of the fan 2, and the end of the guide plate 41 close to the heat exchange module 3 is tilted upward, and the windward side of the guide plate 41 is lowered downward, and the airflow is guided to flow upward along the guide plate 41 to increase the airflow of the upper heat exchanger 31 and reduce the airflow of the lower heat exchanger 32.

[0093] It should be noted that, in practical applications, the above-mentioned postures can be selectively designed according to usage requirements, and the present invention does not impose any special restrictions on the types and quantities of postures of the diversion modules.

[0094] For ease of understanding, some application examples of the present invention are used as examples. The fan 2 is a centrifugal fan. An air outlet 21 facing the heat exchange module 3 is provided on the upper part of the fan 2. The air outlet 21 is inclined downward on the side close to the heat exchange module 3. The angle β between the lower edge of the air outlet 21 of the fan 2 and the horizontal direction is 8°~10°.

[0095] like Fig.10 As shown, the normal posture is that the guide plate 41 is parallel to the lower edge of the air outlet of the fan 2, and the parallel distance L1 from the guide plate 41 to the lower edge of the air outlet of the fan 2 is between 0.2L and 0.3L, and the minimum vertical distance L2 from the guide plate 41 to the water receiving tray 5 is between 0.3L and 0.4L, L is the vertical distance from the lower edge of the air outlet 21 of the fan 2 to the bottom of the shell where the guide structure is located, for example, when L is 95mm, L1 is selected as 23mm, and L2 is selected as 35mm.

[0096] like Fig.11 As shown, the anti-blow water posture is that the angle β3 between the guide plate 41 and the horizontal direction is 0-10°, and the minimum vertical distance L5 from the guide plate 41 to the water receiving tray 5 is 3mm-5mm;

[0097] like Fig.12 As shown, the dehumidification and heating posture is that the angle β2 between the guide plate 41 and the horizontal direction is 32°~38°;

[0098] like Fig.13 As shown, the dehumidification intermediate posture is that the angle β0 between the guide plate and the horizontal direction is between 8° and 10°;

[0099] like Fig.14 As shown, the dehumidification and cooling posture is that the angle β1 between the guide plate and the horizontal direction is between 12° and 15°.

[0100] The inventors conducted three-dimensional modeling simulations on some application examples in Ansys Fluent, defined the inclined design of the upper heat exchanger and the lower heat exchanger, and provided an electric auxiliary heater in the middle position between the upper heat exchanger and the lower heat exchanger. The models in the comparative experiment were basically the same, and the only difference was the addition of the diversion module. In Ansys Fluent, the energy equation and turbulence model calculations were opened, and the fluid calculation area was divided into two. The heat exchange module area was set as a porous medium, and the contact surface of the heat exchange module was set as a porous medium transition surface. The inlet was a velocity inlet, defined as 6m / s, the temperature was 300k, the outlet was a free pressure outlet, and the return air temperature was 273.5k. The calculation time of the transient model was 5s and the time step was 0.1. From the simulation results, as the angle of the guide plate changes, the windward side of the guide plate tilts upward, and the flow velocity of some gases flowing through the upper heat exchanger is slower, and the windward side of the guide plate tilts downward, and the flow velocity of some gases flowing through the lower heat exchanger is slower.

[0101] like Fig.15 As shown, the present invention also proposes a flow diversion control method, which is applied to an air conditioner with a flow diversion structure. The control logic of the flow diversion control method is to obtain the working mode of the air conditioner, and then control the posture of the flow diversion structure according to the working mode. This design can reasonably adjust the airflow state inside the indoor unit by accurately controlling the posture of the flow diversion structure, thereby improving the overall performance of the air conditioner.

[0102] Specifically, if Fig.15 As shown, in some embodiments of the present invention, controlling the posture of the diversion structure according to the working mode includes:

[0103] When the working mode is normal mode, the actual water level of the water receiving tray below the heat exchange module is detected;

[0104] Determine whether the actual water level rises to the set dangerous water level;

[0105] If yes, the flow guide module is controlled to switch to the anti-blowing posture to prevent the airflow from blowing directly to the water receiving tray, so as to make the airflow near the water receiving tray more stable and prevent the water level in the water receiving tray from continuing to rise;

[0106] If not, the control guide module switches to a normal posture to ensure that there is basically no impact on the air outlet of the fan and the heat exchange efficiency of the heat exchange module;

[0107] The normal mode includes at least one of a standby mode, a cooling mode and a heating mode.

[0108] like Fig.15 As shown, in some embodiments of the present invention, controlling the posture of the diversion structure according to the working mode includes:

[0109] When the working mode is the constant temperature dehumidification mode, the upper heat exchanger of the heat exchange module is in the cooling state and the lower heat exchanger is in the heating state. The actual outlet air temperature T1 of the upper heat exchanger and the actual outlet air temperature T2 of the lower heat exchanger are detected, and the temperature difference T3=T2-T1 is calculated;

[0110] Compare the temperature difference T3 with the set value T4. The set value T4 can be designed according to actual needs, such as 4°C~7°C;

[0111] When T3>T4, it means that the temperature difference between the actual outlet air temperature T2 of the lower heat exchanger and the actual outlet air temperature T1 of the upper heat exchanger is large, and the supply air temperature after the two airflows are mixed will be high. At this time, the control guide module switches to the dehumidification and cooling posture, increasing the air flow of the upper heat exchanger and reducing the air flow of the lower heat exchanger;

[0112] When T3=T4, it means that the temperature difference between the actual outlet air temperature T2 of the lower heat exchanger and the actual outlet air temperature T1 of the upper heat exchanger is within a reasonable range. At this time, the control flow guide module is switched to the dehumidification intermediate posture, and the air flow of the upper heat exchanger and the lower heat exchanger maintains the current state;

[0113] When T3<T4, it means that the temperature difference between the actual outlet air temperature T2 of the lower heat exchanger and the actual outlet air temperature T1 of the upper heat exchanger is small, and the supply air temperature after the two airflows are mixed will be low. The control guide module switches to the dehumidification and heating posture to reduce the air flow of the upper heat exchanger and increase the air flow of the lower heat exchanger.

[0114] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. The order of execution of actions, steps, etc. in the devices and methods shown in the specification and the accompanying drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar terms of order used for the convenience of description do not mean that they must be implemented in such an order.

[0115] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flow guiding structure, characterized in that: include: A heat exchange module, the heat exchange module comprising: an upper heat exchanger and a lower heat exchanger that work independently; A fan, the fan is used to blow air to the heat exchange module; A flow guide module, wherein the flow guide module has a flow guide plate located between the air outlet of the fan and the heat exchange module, and the flow guide plate can change its posture to adjust the air flow of the upper heat exchanger and the lower heat exchanger.

2. The flow guiding structure according to claim 1, characterized in that: The flow guide module comprises: A support frame, wherein the support frame is fixedly installed; A first motor, wherein the first motor is mounted on the support frame; A power telescopic rod, the fixed end of which is connected to the transmission shaft of the first motor, the first motor is used to drive the power telescopic rod to rotate, the guide plate is connected to the movable end of the power telescopic rod, and the power telescopic rod is used to adjust the distance of the guide plate relative to the support frame.

3. The flow guiding structure according to claim 2, characterized in that: The flow guide module also includes: A rotating shaft, the rotating shaft is movably mounted on the movable end of the power telescopic rod, and the guide plate is fixed on the rotating shaft; A second motor, the second motor is used to drive the rotating shaft to rotate; Wherein, the transmission shaft of the first motor, the transmission shaft of the second motor and the rotating shaft are all parallel to the length direction of the guide plate.

4. The flow guiding structure according to claim 3, characterized in that: The guide plate is fixed on the rotating shaft via an intermediate connecting piece, one end of the intermediate connecting piece is detachably mounted on the guide plate, and the other end of the intermediate connecting piece is detachably mounted on the rotating shaft.

5. The flow guiding structure according to claim 1, characterized in that: The length L2 of the air outlet of the fan is greater than the length L1 of the guide plate, so as to allow the guide plate to extend into the air outlet.

6. The flow guiding structure according to claim 1, characterized in that: The air inlet end of the upper heat exchanger is inclined upward, the air inlet end of the lower heat exchanger is inclined downward, and the air outlet end of the upper heat exchanger is close to the air outlet end of the lower heat exchanger.

7. The flow guiding structure according to claim 1, characterized in that: The diversion module has at least one of a normal posture, a water-proof posture, a dehumidification and heating posture, a dehumidification and cooling posture, and a dehumidification intermediate posture; The guide plate is away from the air outlet of the fan and the heat exchange module in the normal posture; And / or the guide plate moves to a position close to the bottom of the heat exchange module in the anti-blow water posture, and one end of the guide plate close to the heat exchange module is tilted upward to guide the airflow to prevent water from entering the water receiving tray below the heat exchange module; and / or the guide plate moves to the air outlet of the fan in the dehumidification and heating posture, and one end of the guide plate close to the heat exchange module tilts downward to reduce the air flow of the upper heat exchanger; and / or the guide plate moves to the air outlet of the fan in a dehumidification and cooling posture, and one end of the guide plate close to the heat exchange module tilts upward to increase the air flow of the upper heat exchanger; And / or the guide plate moves to the air outlet of the fan in the intermediate dehumidification posture, and the guide plate is arranged along the air flow direction of the fan.

8. The flow guiding structure according to claim 7, characterized in that: The fan is a centrifugal fan, and an air outlet facing the heat exchange module is provided on the upper part of the fan, and the air outlet is inclined downward on a side close to the heat exchange module, and the angle β between the lower edge of the air outlet of the fan and the horizontal direction is 8°~10°; The normal posture is that the guide plate is parallel to the lower edge of the air outlet of the fan, and the parallel distance L1 from the guide plate to the lower edge of the air outlet of the fan is between 0.2L and 0.3L, and the minimum vertical distance L2 from the guide plate to the water receiving tray is between 0.3L and 0.4L, and L is the vertical distance from the lower edge of the air outlet of the fan to the bottom of the shell where the guide structure is located; And / or the anti-blow water posture is that the angle β3 between the guide plate and the horizontal direction is 0-10°, and the minimum vertical distance L5 from the guide plate to the water receiving tray is 3mm-5mm; And / or the dehumidification and heating posture is that the angle β2 between the guide plate and the horizontal direction is between 32° and 38°; And / or the dehumidification and cooling posture is that the angle β1 between the guide plate and the horizontal direction is 12°~15°; And / or the dehumidification intermediate posture is that the angle β0 between the guide plate and the horizontal direction is between 8° and 10°.

9. Air conditioners, including: An indoor unit, characterized in that the indoor unit comprises the flow guide structure according to any one of claims 1 to 8.

10. The air conditioner according to claim 9, characterized in that: The air conditioner is a duct air conditioner.

11. A flow control method, said flow control method being applied to the air conditioner of claim 9 or 10, characterized in that: include: Obtaining the operating mode of the air conditioner; The posture of the guide structure is controlled according to the working mode.

12. The flow control method according to claim 11, characterized in that: Controlling the posture of the guide structure according to the working mode includes: When the working mode is the normal mode, detecting the actual water level of the water receiving tray below the heat exchange module; Determining whether the actual water level rises to a set dangerous water level; If yes, control the diversion module to switch to the anti-blow water posture; If not, controlling the diversion module to switch to a normal posture; The normal mode includes at least one of a standby mode, a cooling mode and a heating mode.

13. The flow control method according to claim 11, characterized in that: Controlling the posture of the guide structure according to the working mode includes: When the working mode is the constant temperature dehumidification mode, the upper heat exchanger of the heat exchange module is in the cooling state and the lower heat exchanger is in the heating state, the actual air outlet temperature T1 of the upper heat exchanger and the actual air outlet temperature T2 of the lower heat exchanger are detected, and the temperature difference T3 = T2-T1 is calculated; Comparing the temperature difference T3 with a set value T4; When T3>T4, the diversion module is controlled to switch to a dehumidification and cooling posture; and / or when T3=T4, controlling the flow guide module to switch to the dehumidification intermediate posture; And / or when T3<T4, control the diversion module to switch to the dehumidification and heating posture.

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